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750mm hot rolled stainless steel strip production line
General description
The 750mm hot rolled stainless steel strip production line of Jinhai Stainless Steel Co., Ltd. produces 1 million tons of hot rolled coils of various specifications every year.
The heating furnace control system adopts German Siemens s7-1500 programmable controller and Advantech industrial computer to form an advanced and practical control system. The s7-1500 programmable controller runs the software program to collect, process and transmit data, and has real-time communication with the upper computer (monitoring system). The industrial computer runs SIMATIC WinCC upper computer software to provide the system monitoring interface.
The heated slab is removed from the furnace scale and attached protective slag on the surface by the mechanical descaling machine and rough descaling box, and then sent to the rough rolling unit for rolling by the roller table, and the slab is rolled into an intermediate slab of 30 ~ 40mm.With the cooperation of the width gauge at the outlet of the roughing mill, the vertical roll mill adopts the hydraulic AWC automatic control system to control the width of the intermediate billet;It also has the function of ending the head and tail (SSC). When the width of the head and tail is too wide, the width of the head and tail can be corrected through the SSC function
The reduction of finish rolling flat roll f1-f9 and Fe1 stands is full stroke hydraulic reduction, which is electrically controlled by P201 and p202.
The automatic positioning control of roll gap is realized by installing a large stroke hydraulic screwdown cylinder on the transmission side and operation side of the frame to quickly drive the up and down of the support roll and work roll system, and the thickness fluctuation caused by the temperature drop of strip steel is eliminated through the on-line roll gap adjustment, i.e. AGC control function, so as to achieve the purpose of high-precision thickness,Produce high-quality finished strip steel.
The coiler adopts two full hydraulic underground coilers with four auxiliary rollers. The strip steel is coiled on the drum under the action of the auxiliary roller.A hydraulic side guide plate is set in front of the coiler to strictly align the strip steel;A pinch roll is set in front of the coiler to form a certain tension with the coiler when the strip head is formed and the strip tail comes out of the finishing mill.
Strip thickness: | 2.4～8.0 | mm |
Strip width: | 450~600 | mm |
Coil inner diameter: | 530 | mm |
Outer diameter of steel coil: | Max. 1280 | mm |
Coil weight: | Max.3.9 | t |
Coiler index: | Max. 10 | t |
1.1.1 Yield allocated by variety
Serial number | Product name | Representative steel grade | Planned annual output (T) | percentage (％) |
1. | stainless steel | 201 | 500000 | 50 |
2. | 304 | 300000 | 30 | |
3. | 420 | 200000 | 20 | |
total | 1000000 | 100 |
Mechanical equipment configuration of main rolling line
1、 Equipment in heating furnace area
1. Furnace feeding roller table
Roller size:Φthree hundred and fifty×The wall thickness of 800 mm steel pipe is 35 mm
Roll distance: 800 mm
Roll speed: 0.85 M / S
Number of rolls: 8
Motor: yzr200l-6 22 kW, 2 sets of variable frequency speed regulation
structure characteristics;Centralized chain drive, and side plates are set on both sides of the roller table.The roller is a hollow roller, and the roller deck and side plate are welded structural parts.
Lubrication: reducer oil pool lubrication.The roller bearings are manually lubricated with dry oil.
Cooling: roller body, roller bearing seat, turbid circulating water internal cooling.
2. Pusher
Oil cylinder size: 350x270x1500mm 2 sets, total thrust 700T
Oil tank size: 1800x1700x1000 1 set
Oil pump model: hy250s-rp VG = 250ml PN = 31.5mp n = 1500rpm 3 sets
3 heating furnace
Furnace type: push type continuous heating furnace
Blower: 9-26no14d flow: 58902 ~ 70682m3 / h;Total pressure: 11830 ~ 11099pa
Motor model for fan: y355l1-4 power: 280KW 2 sets (frequency conversion control)
Induced draft fan: y9-38no14d flow: 77997 ~ 85796m3 / h total pressure: 3128 ~ 3059pa
Motor model for fan: y315m3-6 power: 132kw (frequency conversion control)
Vaporization cooling: drum diameter isΦ1400mm, length 8000mm
Feed pump:
Soft water treatment system: 1 set, soft water treatment capacity: 20t / h
4. Discharge roller table:
Roller size:Φtwo hundred and ninety-five×The wall thickness of 800 mm steel pipe is 35 mm
Roll distance: 800 mm
Number of rolls: 40
Reducer: ZL50 I = 8
Motor: yzr200l-6 22 kW, 6 sets of variable frequency speed regulation
structure characteristics;Centralized chain drive, and side plates are set on both sides of the roller table.The roller is a hollow roller, and the roller deck and side plate are welded structural parts.
Lubrication: reducer oil pool lubrication.The roller bearings are manually lubricated with dry oil.
Cooling: cooling inside the turbid circulating water of the roller body and the turbid circulating water of the roller bearing seat.
5. Tapping machine:The thrust is about 5T, and the effective stroke is ≥ 6m.1 set
2、 Phosphorus remover area equipment
1. Front roller table of descaling machine
Performance parameters:
Roller size:φ295mm, the wall thickness of steel pipe is 35 mm
Number of rolls: 12 1000mm, 6 800mm
Roll spacing: 800mm
Motor: yga160s1-6 3kw
Reducer: zd20 speed ratio i = 4
structure characteristics;The AC speed regulating motor drives separately, side plates are set on both sides of the roller table, and a bridge is set in the middle.The roller is a hollow roller, and the roller deck and side plate are welded structural parts.YASKAWA a1000 frequency converter control, forward and reverse
Lubrication: reducer oil pool lubrication.The roller bearings are manually lubricated with dry oil.
Cooling: roller body spray cooling.
2. Descaling vertical roll mill
Purpose: mechanical scale breaking, edge rolling.
Quantity: 1 set
Performance parameters:
Type: horizontal transmission mechanical reduction vertical phosphorus removal
Roll diameter:φ520mm。Roll body length: 600mm
Hydraulic steel turnover machine: 1 set (including oil tank, 32py14-1b oil pump and hydraulic valve group)
Alignment box: 1 set
Reducer: 1 set
Motor: ac800kw, 1 set,
3. Descaling box
Purpose: to remove the oxide scale on the surface of hot billet
Quantity: 1 set
Performance parameters:
Part specification: section 150, 160×450-575mm
Blank length: 6M
Number of nozzles: 18
Steel grade: stainless steel
Working pressure: sprayed on the rolled piece surface pressure: 25MPa
4. Phosphorus removal pump
Performance parameters:
3D series high pressure horizontal three plunger electric reciprocating descaling pump,
Descaling pump model: 3ds30 / 35C,
Quantity: 4 sets (3 for use and 1 for standby)
Rated flow: 30m3 / h, rated pressure: 35MPa;
Motor power: yvp355l3-4, 355KW, 4 sets
5. Rear roller table of descaling box
Roller size:φ295mm, the wall thickness of steel pipe is 35 mm
Number of rollers: 10 1000mm, 12 800mm
Roll spacing: 800mm
Motor: yga160s1-6 3kw
Reducer: zd20 speed ratio i = 4
structure characteristics;The AC speed regulating motor drives separately, side plates are set on both sides of the roller table, and a bridge is set in the middle.The roller is a hollow roller, and the roller deck and side plate are welded structural parts.YASKAWA a1000 frequency converter control, forward and reverse
Lubrication: reducer oil pool lubrication.The roller bearings are manually lubricated with dry oil.
Cooling: roller body spray cooling.
3、 Roughing area equipment
1. Rough rolling inlet roller table
Roller size:φ295mm, the wall thickness of steel pipe is 35 mm
Working face: 1400mm
Number of rolls: 13 rolls
Spacing: 800mm
Motor: yga160s1-6 3KW 13 sets
Reducer: zd20 speed ratio i = 4 13 sets
structure characteristics;The AC speed regulating motor drives separately, side plates are set on both sides of the roller table, and a bridge is set in the middle.The roller is a hollow roller, and the roller deck and side plate are welded structural parts.YASKAWA a1000 frequency converter control, forward and reverse
Lubrication: reducer oil pool lubrication.The roller bearings are manually lubricated with dry oil.
Cooling: roller body spray cooling.
2. Front centering side guide plate of roughing mill
Purpose: the side guide plate is located in front of 750 two high reversible rolling mill;Its function is to align the continuous casting billet and guide the continuous casting billet into the roughing flat roll mill.
performance parameter
The centering side guide plate is hydraulically driven rack and pinion type.
The guide plate is composed of push plate, guide roller, upper and lower push rods and transmission device.Racks are installed on the upper and lower push rods,
The gears mesh with the upper and lower racks at the same time to ensure the synchronous action of the two push rod devices, and the guide plate on the transmission side is installed
On the upper push rod, the operating side guide plate is installed on the lower pull rod.When the hydraulic cylinder extends, it drives the upper push rod to push forward,
Through the action of the gear, the pull-down rod is driven to pull back, so that the guide plates on the transmission side and the operation side are synchronized and symmetrically close to the rolling center line.On the contrary, when the hydraulic cylinder shrinks, the guide plates on the transmission side and the operation side are synchronized and symmetrically opened on the rolling center line.The opening of the side guide plate is detected and controlled by the sensor.
Type: | Hydraulically driven rack and pinion type | |
Minimum working opening | mm | 400 |
Maximum working opening | mm | 800 |
Hydraulic cylinder | number | 2 |
Cylinder diameter / rod diameter | mm | Φ125/70 |
Maximum working stroke | mm | 300 |
Maximum centering force (one side) | kN | 250 |
3. Roughing mill
Mill Name: 750 two high reversible mill
Application: the 150 mm thick continuous casting billet is rolled into 30-40 mm thick intermediate billet through 5 passes
Quantity: 1 set
Performance parameters:
Type: horizontal transmission electromechanical screwdown
Roll balance mode: hydraulic drive upper balance
Roll diameter:φ820mm。Roll body length: 780mm
Work roll change mode: the flat plate trolley device driven by hydraulic cylinder pulls out the roll change;
Transmission shaft: cross universal shaft swc780-680wf * 3500 2 setting brackets (hydraulic balance)
Alignment box: model 850, 1 set with hard tooth surface
Motor: Harbin electric z2500 / 14004200kw, 5160a, 900v, 60 / 120 rpm, 1 set
A bridge crossing device is set between rough rolling and vertical rolling, and free rollers are equipped at both ends of the bridge
4. Roughing vertical roll mill
Purpose: it is arranged together with R1 flat roll mill to control the width of billet edge.
Type: upper drive, two vertical motors drive the combined reducer to drive the roll to rotate.
Performance parameters:
The side pressure device is driven by the hydraulic cylinder servo valve;Set hydraulic AWC and SSC functions.A displacement sensor is arranged in the side pressure oil cylinder.
Roll diameter:φ650mm。Roll body length: 395mm
Roll balance mode: hydraulic cylinder drive control balance.
Roll changing device of vertical roll mill: the frame device is pulled out as a whole.
Vertical roll mill drive shaft: two cross universal joint shafts swc390bh-1903
Set the axle lifting device (driven by hydraulic cylinder).
Main reducer: hard tooth surface reducer is adopted;The high-speed shaft adopts domestic high-quality bearings.
Motor: z4-355-22361kw, 982a, 440V, 680 / 1600 rpm, 2 sets
5. Transport roller table behind roughing vertical roll
Purpose: to receive rolled pieces and transport them to the cutting shear direction.
Performance parameters:
Roller size:φ295 * 800mm, the wall thickness of steel pipe is 35mm
Number of rolls: 45
Roll spacing: 800mm
Motor: yga160s1-6 3kw
Reducer: zd20 speed ratio i = 4
structure characteristics;The AC speed regulating motor drives separately, side plates are set on both sides of the roller table, and a bridge is set in the middle.The roller is a hollow roller, the roller neck is cooled by water spray, the roller deck frame and side plate are welded structural parts, and the roller deck is provided with a thermal insulation cover.YASKAWA a1000 frequency converter control, forward and reverse
Lubrication: reducer oil pool lubrication.Manual dry oil lubrication of roller bearing
4.Finishing mill equipment
1
The head cutting flying shear is installed before the finishing vertical roll to cut off the irregular head and tail before the intermediate strip enters the finishing mill.
Model: qa95-300 1 set
Intermediate strip specification (thickness)×Width): max40×600 mm
Shear force: 3000 kn
Shear temperature: ≥ 900 ℃
Cutting edge length: 650mm
Cutting edge replacement method: online cutting edge replacement
Waste collection: the waste enters the hopper through the chute and is lifted away by the crane.
2
Performance parameters:
Roller size:φ295 * 800mm, the wall thickness of steel pipe is 35mm
Number of rolls: 5
Roll spacing: 800mm
Motor: yga160s1-6 3kw
Reducer: zd20 speed ratio i = 4
structure characteristics;The AC speed regulating motor drives separately, side plates are set on both sides of the roller table, and a bridge is set in the middle.The roller is a hollow roller, the roller neck is cooled by water spray, the roller deck frame and side plate are welded structural parts, and the roller deck is provided with a thermal insulation cover.YASKAWA a1000 frequency converter control, forward and reverse
Lubrication: reducer oil pool lubrication.Manual dry oil lubrication of roller bearing
3. F1E finishing vertical roll mill
Purpose: it is arranged before finishing rolling F1 to control the width of billet edge.
Type: upper drive, two vertical motors drive the combined reducer to drive the roll to rotate.
Performance parameters:
The side pressure device is driven by the hydraulic cylinder servo valve;Set hydraulic AWC and SSC functions.A displacement sensor is arranged in the side pressure oil cylinder.
Roll diameter:φ500mm。Roll body length: 240mm
Roll balance mode: hydraulic cylinder drive control balance.
Roll changing device of vertical roll mill: the frame device is pulled out as a whole.
Vertical roll mill drive shaft: cross universal joint shaft swc280ch-1901 * 1300 + 350;Article 2
Set the axle lifting device (driven by hydraulic cylinder).
Main reducer: hard tooth surface reducer is adopted;The high-speed shaft adopts domestic high-quality bearings.
Motor: z4-315-11132kw, 344A, 440V, 500 / 1600 rpm
4. Finishing two high mill (F1)
The rolling mill frame is integrally cast and made of high-quality medium carbon structural steel. The two sides of the window are bolted to the frame lining plate, and the material is 40Cr,
Quantity: 1 set
Performance parameters:
Type: horizontal drive
Pressing mode: Hydraulic AGC pressing
Roll balance mode: hydraulic drive upper balance
Roll diameter:φ680mm。Roll body length: 730mm
Work roll change mode: the flat plate trolley device driven by hydraulic cylinder pulls out the roll change;
Transmission shaft: cross universal shaft swc780-680wf * 3500 2
Setting bracket (hydraulic balance)
Alignment box: model 850, 1 set with hard tooth surface
Main reducer: hard tooth surface reducer is adopted;Domestic high-quality bearings are adopted.1 set
Motor: dc2250kw, 1 set
5. Finishing four high mill (f2-f9)
Main technical data:
The rolling mill frame is integrally cast and made of high-quality medium carbon structural steel. The two sides of the window are bolted to the frame lining plate, which is made of 40Cr. Guide devices are set at the front and rear of the rolling mill.Rolling mill connecting beam is set between stands.
Quantity: 8
Performance parameters:
Type: horizontal transmission
Pressing mode: Hydraulic AGC pressing
Roll balance mode: hydraulic drive upper balance
Backup roll diameter:φ660mm。Roll body length: 730mm
Work roll diameter:φ410 roll body length: 750mm
Work roll change mode: the flat plate trolley device driven by hydraulic cylinder pulls out the roll change;
Transmission connecting shaft: two cross universal connecting shafts swc440wf-390-350 * 2782
Setting bracket (hydraulic balance)
Tooth box: model 450, 8 sets of hard tooth surfaces
Reducer: model 1200, 7 sets with hard tooth surface
Motor: dc2250kw, 2 sets
Dc1600kw upper backpack water cooling 6 sets
6. Electric looper
Purpose: to support the strip steel and absorb the set amount caused by the dynamic speed drop caused by steel biting;And make the strip steel form tension between frames;Participate in speed control of finishing mill.
Quantity: 6 sets
Main technical data:
Motor: zzj-806, 22.4kw, 440V, 56a, 220V, 3.03a, 650 / 1300 rpm, 6 sets
Reducer: ZL50 6 sets
7. rear output roller table of finishing mill
Purpose: used to receive and transport finished strip steel after finishing rolling.
Roller specification:фtwo hundred and fifteen×750mm
Quantity: 82
Transmission mode: AC variable frequency motor direct transmission
Motor: AC variable frequency motor ygp132m2-4 1450r / min 2.2kw
Control Description: manually control the forward and reverse rotation, start and stop of roller table.
structure characteristics
Each roller assembly includes roller, bearing seat, coupling and motor.The roller is of hollow structure.The upper part of the roller is provided with a side plate, which is installed on the transmission side and the operation side.The motor is equipped with a protective cover to prevent cooling water from splashing onto the motor.
The output roller table roller is water-cooled by external spray.
Bearing lubrication: manual dry oil lubrication
5、 Coiling area equipment
1Front guide plate of coiler
Guide plate opening: 400 ~ 800 mm
Moving speed: 100 / 200mm / s, hydraulically driven.
Side guide hydraulic cylinder:Φ125/Φseventy×300 mm 2 sets
The equipment is composed of inclined section guide plate, parallel section guide plate, transmission device, etc.
The equipment is symmetrically arranged by the operation side and the transmission side.A hydraulic cylinder drives the guide plate device to move in parallel on each side;The parallel section guide plate drives the inclined section guide plate to swing around the fixed hinge point;The hydraulic cylinders on both sides move synchronously;The alignment of strip steel can be realized.The guide plate device drives the push rod device and drives the synchronous shaft through the synchronous gearbox to ensure the parallel movement of the guide plate device.
The transmission device is composed of synchronous gearbox, synchronous shaft, push rod device, hydraulic cylinder transmission device, rail seat, etc.
Lubrication: including automatic dry oil lubrication and manual dry oil lubrication.
3. Centering roller table at the front entrance of coiler
Roller specification:фtwo hundred and fifteen×750mm
Quantity: 8
Transmission mode: AC variable frequency motor direct transmission
Motor: AC variable frequency motor ygp132m2-4 1450r / min 2.2kw
structure characteristics
Each roller assembly includes roller, bearing seat, coupling and motor.The roller is of hollow structure.The upper part of the roller is provided with a side plate, which is installed on the transmission side.The motor is equipped with a protective cover to prevent cooling water from splashing onto the motor.
The output roller table roller is water-cooled by external spray.
4Pinch roll
Pinch roll: upper rollΦsix hundred and five×800 mm 1 piece
Lower rollΦthree hundred and five×800 mm 1 piece
Pinch roll motor: z4-315-21160kw, 440V, 413a, 180V, 22.8a, 500 / 1500 rpm
The equipment is installed on the upper part of the entrance side of the underground coiler. Before the strip steel enters the coiler, the head of the strip steel is bent to guide the strip steel into the coiler.At the same time, the tension between the finishing mill and the coiler shall be established to ensure good coiling quality.
The transmission of the upper and lower rollers is directly driven by the motor through the universal joint shaft.The roll gap adjustment is realized by the hydraulic cylinder installed on the frame to drive the upper roll bearing seat to move up and down.
A guiding guard plate and a pressing roller device are arranged on the inlet side of the pinch roll to protect the tail of the strip steel from damage. An outlet valve is installed on the outlet side to guide the strip steel into the coiler;It can also prevent the strip steel from flying out
Pinch roll is mainly composed of frame assembly, upper pinch roll device, lower pinch roll device, pinch roll drive device, etc.
The frame adopts thick steel plate welding structure.
The upper pinch roll is a hollow roll, the roll surface is overlaid, and the roller bearing is a roller bearing.
The lower pinch roll is a solid roll, the roll surface is overlaid, and the roller bearing is a roller bearing.
Lubrication: the bearing is centralized dry oil lubrication, and the pressure of the system is 20MPa.
5. Coiler
Coiler type: full hydraulic four auxiliary coiler
Strip thickness×Width: 1.8-8.0×450－600 mm
Coil inner diameter:Φ530mm
Outer diameter of steel coil:Φ1250～Φ1880 mm
Coiling speed: Max 13 m / S
Coiling temperature: 550 ~ 650 ° C;
Drum: plunger connecting rod type, length 800 mm, 1 piece
Maximum expansion diameter of drum:Ф530 mm
Normal diameter reduction of drum:Ф485 mm
Drum expansion and contraction hydraulic cylinder:Ф320/Ф180/Фone hundred and twenty×73.86mm 1 piece
Working pressure: P = 6Mpa
Auxiliary winding roller:
1Hydraulic cylinder of No. 2 auxiliary winding roller: zq-125 / 90 * 620 1 piece
2Hydraulic cylinder of No. 2 auxiliary winding roller: zq-125 / 90 * 620 1 piece
3Hydraulic cylinder of No. auxiliary winding roller: zq-125 / 90 * 390 1 piece
4Hydraulic cylinder of No. auxiliary winding roller: zq-125 / 90 * 390 1 piece
Drum motor: z4-355-22250kw, 623a, 440V, 750 / 1600 rpm, 1 set
Auxiliary winding roller motor: zzj-806, 22.4kw, 440V, 56a, 220V, 3.03a, 650 / 1300 rpm, 4 sets
The coiler is a dual-purpose coiler that can coil steel from thin specification to thick specification.
The coiler is mainly composed of frame assembly, external support device, coiler device, coiler arm device (1#, 2#, 3#, 4#), coiler drive device, drum device, drum drive device, etc.
Type: hydraulic cylinder driven trolley walking type
Coil temperature: 550 ℃ - 650 ℃.
structure characteristics
The equipment is composed of lifting device, traveling device, track, stroke control device, drag chain bench and piping.
The lifting device is composed of lifting frame and hydraulic cylinder.The lifting frame is welded into a closed frame by steel plate.
A limit switch is installed on the track to send a signal to the final position to control the start point and end point of action.Alloy steel forgings for wheels and axles.
The track is composed of welded H-section steel, and safety buffers are set at both ends of the track;The traveling mechanism is placed on the frame, which is a welded structure.
Roller size:Фtwo hundred and forty×800 mm
Number of rollers: 6
Motor: AC variable frequency motor ygp132m2-4 1450r / min 2.2kW 6 sets
2The inlet roller table of No. 2 coiler is located in front of the pinch roller at the inlet of No. 2 coiler to transport the strip steel to the underground coiler.A side guide plate is installed on the roller table, and the structure, side guide plate, coiler and other equipment of the roller table are the same as those of the 1# coiler
6、 Configuration list of public and auxiliary water supply and drainage system
Water supply and drainage equipment list | ||||
Serial number | Equipment name | Specification and model | Company | quantity |
one | Clean circulating water pump station | |||
1 | Clean annular feedwater pump set | XA150/26 | platform | 3 |
electromotor | Y200L-4,30Kw | platform | 3 | |
2 | Heater feed pump set | XA150/26 | platform | 3 |
electromotor | Y200L-4,30Kw | platform | 3 | |
3 | Dephosphorization pump feed pump set | XA150/26 | platform | 2 |
electromotor | Y200L-4,30Kw | platform | 2 | |
two | Turbid ring water pump station | |||
1 | Finishing mill feed pump set | XA200/32 | platform | 3 |
electromotor | JS-180S-4 | platform | 3 | |
2 | Finishing mill feed pump set | XA200/26 | platform | 3 |
electromotor | Y250M-4,55Kw | platform | 3 | |
three | Rough rolling sump | |||
1 | Rough rolling return water pump set | XA200/26 | ||
electromotor | Y250M-4,55Kw | platform | 2 | |
four | Coiling sump | |||
1 | Coiling return water pump set | XA200/32 | platform | 5 |
electromotor | JS-180S-4 | platform | 5 | |
Configuration list of electric control system | ||||||
Serial number | name | to configure | quantity | Company | Power kw | |
1 | Hydraulic pusher | 3Two hydraulic pumps, one for use and one for standby, and two frequency converters | 1 | set | 55Kw | |
2 | Steel jacking machine | 1 | set | 18.5Kw | ||
3 | Heating furnace blower | Two frequency converters, one for use and one for standby | 2 | set | 280Kw | |
4 | Induced draft fan | 1 control frequency converter | 1 | set | 132Kw | |
5 | Drum feed pump | One for use and one for standby | 2 | set | 15Kw | |
6 | Outlet roller table of heating furnace | 6Three motors are driven by chain and controlled by three frequency converters | 40 | group | 18.5Kw | |
7 | Phosphorus removal roller table | Single transmission, one Yaskawa a1000 frequency converter | 13 | group | 3Kw | |
8 | Phosphorus breaker | One set of startup cabinet of hydropower unit | 1 | set | 800Kw | |
9 | Phosphorus removal pump | Plunger pump 3 for use and 1 for standby, 4 ABB Frequency Converters | 4 | set | 355Kw | |
10 | Front roller table of roughing mill | Single transmission, one Yaskawa a1000 frequency converter | 38 | group | 3Kw | |
11 | Front centering device of roughing mill | One set of hydraulic station | 1 | set | 5.5Kw | |
12 | Roughing reversing mill | Siemens 6ra80 control system | 1 | set | 4200Kw | |
13 | Roughing reversible vertical roll mill | AWC side voltage, Siemens 6ra80 control system, 2 DC motors | 1 | set | 361Kw | |
14 | Rear and shear roller table of roughing mill | Single transmission, 2 sets of Anchuan a1000 frequency converters | 45 | group | 3Kw | |
15 | ||||||
16 | Hot shear | Frequency converter control | 1 | set | 45Kw | |
17 | Finishing vertical roll mill | 2DC motor + AWC side voltage, Siemens 6ra80 control system | 1 | set | 132Kw | |
18 | Finishing mill F1 | AGC screwdown, Siemens 6RA70 control system | 1 | set | 2250Kw | |
19 | Finishing mill F2 | AGC screwdown, Siemens 6RA70 control system | 1 | set | 2250Kw | |
20 | Finishing mill F3 | AGC screwdown, Siemens 6RA70 control system | 1 | set | 2250Kw | |
21 | Finishing F4 mill | AGC screwdown, Siemens 6RA70 control system | 1 | set | 1600Kw | |
22 | Finishing mill F5 | AGC screwdown, Siemens 6RA70 control system | 1 | set | 1600Kw | |
23 | Finishing mill F6 | AGC screwdown, Siemens 6RA70 control system | 1 | set | 1600Kw | |
24 | Finishing F7 mill | AGC screwdown, Siemens 6RA70 control system | 1 | set | 1600Kw | |
25 | Finishing mill F8 | AGC screwdown, Siemens 6RA70 control system | 1 | set | 1600Kw | |
26 | Finishing F9 mill | AGC screwdown, Siemens 6RA70 control system | 1 | set | 1600Kw | |
27 | 1# looper | Siemens 6ra80 control system | 1 | set | 37Kw | |
28 | 2# looper | Siemens 6ra80 control system | 1 | set | 37Kw | |
29 | 3# looper | Siemens 6ra80 control system | 1 | set | 22.4Kw | |
30 | 4# looper | Siemens 6ra80 control system | 1 | set | 22.4Kw | |
31 | 5# looper | Siemens 6ra80 control system | 1 | set | 22.4Kw | |
32 | 6# looper | Siemens 6ra80 control system | 1 | set | 22.4Kw | |
33 | Width gauge | Dalian yataihua | 2 | platform | ||
34 | Coiling transport roller table | Single transmission, 4 sets of Anchuan a1000 frequency converters | 82 | group | 2.2Kw | |
35 | Coiler | 2 sets of horizontal cored coiling and 2 sets of Siemens 6RA70 control system | 2 | set | 250Kw | |
36 | 2# centering roller table | Single pass, one Schneider frequency converter | 6 | group | 2.2Kw | |
37 | High and low voltage thin oil station of roughing mill motor | High voltage one for use and one for standby, low voltage one for use and one for standby | 1 | set | 30Kw | |
38 | Roughing hydraulic station | 2 roll change pumps and 2 balance pumps | 1 | set | 30Kw | |
39 | Rough rolling lubrication station | One for use and one for standby | 1 | set | 30Kw | |
40 | Roughing AGC hydraulic station | One for use and one for standby | 1 | set | 55Kw | |
41 | Finish rolling AGC hydraulic station | Three for use and two for standby | 1 | set | 55Kw | |
42 | Finishing hydraulic station | 2 roll change pumps and 2 balance pumps | 1 | set | 30Kw | |
43 | Finish rolling lubrication station | One for use and one for standby | 1 | set | 30Kw | |
44 | Coiling hydraulic station | Three for use and two for standby | 1 | set | 55Kw | |
45 | Coiling lubrication station | One for use and one for standby | 1 | set | 5.5Kw | |
46 | AGC screwdown control system for roughing mill | Siemens | 1 | set | ||
47 | AGC screwdown control system for finish rolling | Siemens, TDC | 1 | set | ||
8、 Electronic control system configuration
750mm hot rolled stainless steel strip production line
General description
The 750mm hot rolled stainless steel strip production line of Jinhai Stainless Steel Co., Ltd. produces 1 million tons of hot rolled coils of various specifications every year.
The heating furnace control system adopts German Siemens s7-1500 programmable controller and Advantech industrial computer to form an advanced and practical control system. The s7-1500 programmable controller runs the software program to collect, process and transmit data, and has real-time communication with the upper computer (monitoring system). The industrial computer runs SIMATIC WinCC upper computer software to provide the system monitoring interface.
The heated slab is removed from the furnace scale and attached protective slag on the surface by the mechanical descaling machine and rough descaling box, and then sent to the rough rolling unit for rolling by the roller table, and the slab is rolled into an intermediate slab of 30 ~ 40mm.With the cooperation of the width gauge at the outlet of the roughing mill, the vertical roll mill adopts the hydraulic AWC automatic control system to control the width of the intermediate billet;It also has the function of ending the head and tail (SSC). When the width of the head and tail is too wide, the width of the head and tail can be corrected through the SSC function
The reduction of finish rolling flat roll f1-f9 and Fe1 stands is full stroke hydraulic reduction, which is electrically controlled by P201 and p202.
The automatic positioning control of roll gap is realized by installing a large stroke hydraulic screwdown cylinder on the transmission side and operation side of the frame to quickly drive the up and down of the support roll and work roll system, and the thickness fluctuation caused by the temperature drop of strip steel is eliminated through the on-line roll gap adjustment, i.e. AGC control function, so as to achieve the purpose of high-precision thickness,Produce high-quality finished strip steel.
The coiler adopts two full hydraulic underground coilers with four auxiliary rollers. The strip steel is coiled on the drum under the action of the auxiliary roller.A hydraulic side guide plate is set in front of the coiler to strictly align the strip steel;A pinch roll is set in front of the coiler to form a certain tension with the coiler when the strip head is formed and the strip tail comes out of the finishing mill.
Strip thickness: | 2.4～8.0 | mm |
Strip width: | 450~600 | mm |
Coil inner diameter: | 530 | mm |
Outer diameter of steel coil: | Max. 1280 | mm |
Coil weight: | Max.3.9 | t |
Coiler index: | Max. 10 | t |
1.1.1 Yield allocated by variety
Serial number | Product name | Representative steel grade | Planned annual output (T) | percentage (％) |
1. | stainless steel | 201 | 500000 | 50 |
2. | 304 | 300000 | 30 | |
3. | 420 | 200000 | 20 | |
total | 1000000 | 100 |
Mechanical equipment configuration of main rolling line
1、 Equipment in heating furnace area
1. Furnace feeding roller table
Roller size:Φthree hundred and fifty×The wall thickness of 800 mm steel pipe is 35 mm
Roll distance: 800 mm
Roll speed: 0.85 M / S
Number of rolls: 8
Motor: yzr200l-6 22 kW, 2 sets of variable frequency speed regulation
structure characteristics;Centralized chain drive, and side plates are set on both sides of the roller table.The roller is a hollow roller, and the roller deck and side plate are welded structural parts.
Lubrication: reducer oil pool lubrication.The roller bearings are manually lubricated with dry oil.
Cooling: roller body, roller bearing seat, turbid circulating water internal cooling.
2. Pusher
Oil cylinder size: 350x270x1500mm 2 sets, total thrust 700T
Oil tank size: 1800x1700x1000 1 set
Oil pump model: hy250s-rp VG = 250ml PN = 31.5mp n = 1500rpm 3 sets
3 heating furnace
Furnace type: push type continuous heating furnace
Blower: 9-26no14d flow: 58902 ~ 70682m3 / h;Total pressure: 11830 ~ 11099pa
Motor model for fan: y355l1-4 power: 280KW 2 sets (frequency conversion control)
Induced draft fan: y9-38no14d flow: 77997 ~ 85796m3 / h total pressure: 3128 ~ 3059pa
Motor model for fan: y315m3-6 power: 132kw (frequency conversion control)
Vaporization cooling: drum diameter isΦ1400mm, length 8000mm
Feed pump:
Soft water treatment system: 1 set, soft water treatment capacity: 20t / h
4. Discharge roller table:
Roller size:Φtwo hundred and ninety-five×The wall thickness of 800 mm steel pipe is 35 mm
Roll distance: 800 mm
Number of rolls: 40
Reducer: ZL50 I = 8
Motor: yzr200l-6 22 kW, 6 sets of variable frequency speed regulation
structure characteristics;Centralized chain drive, and side plates are set on both sides of the roller table.The roller is a hollow roller, and the roller deck and side plate are welded structural parts.
Lubrication: reducer oil pool lubrication.The roller bearings are manually lubricated with dry oil.
Cooling: cooling inside the turbid circulating water of the roller body and the turbid circulating water of the roller bearing seat.
5. Tapping machine:The thrust is about 5T, and the effective stroke is ≥ 6m.1 set
2、 Phosphorus remover area equipment
1. Front roller table of descaling machine
Performance parameters:
Roller size:φ295mm, the wall thickness of steel pipe is 35 mm
Number of rolls: 12 1000mm, 6 800mm
Roll spacing: 800mm
Motor: yga160s1-6 3kw
Reducer: zd20 speed ratio i = 4
structure characteristics;The AC speed regulating motor drives separately, side plates are set on both sides of the roller table, and a bridge is set in the middle.The roller is a hollow roller, and the roller deck and side plate are welded structural parts.YASKAWA a1000 frequency converter control, forward and reverse
Lubrication: reducer oil pool lubrication.The roller bearings are manually lubricated with dry oil.
Cooling: roller body spray cooling.
2. Descaling vertical roll mill
Purpose: mechanical scale breaking, edge rolling.
Quantity: 1 set
Performance parameters:
Type: horizontal transmission mechanical reduction vertical phosphorus removal
Roll diameter:φ520mm。Roll body length: 600mm
Hydraulic steel turnover machine: 1 set (including oil tank, 32py14-1b oil pump and hydraulic valve group)
Alignment box: 1 set
Reducer: 1 set
Motor: ac800kw, 1 set,
3. Descaling box
Purpose: to remove the oxide scale on the surface of hot billet
Quantity: 1 set
Performance parameters:
Part specification: section 150, 160×450-575mm
Blank length: 6M
Number of nozzles: 18
Steel grade: stainless steel
Working pressure: sprayed on the rolled piece surface pressure: 25MPa
4. Phosphorus removal pump
Performance parameters:
3D series high pressure horizontal three plunger electric reciprocating descaling pump,
Descaling pump model: 3ds30 / 35C,
Quantity: 4 sets (3 for use and 1 for standby)
Rated flow: 30m3 / h, rated pressure: 35MPa;
Motor power: yvp355l3-4, 355KW, 4 sets
5. Rear roller table of descaling box
Roller size:φ295mm, the wall thickness of steel pipe is 35 mm
Number of rollers: 10 1000mm, 12 800mm
Roll spacing: 800mm
Motor: yga160s1-6 3kw
Reducer: zd20 speed ratio i = 4
structure characteristics;The AC speed regulating motor drives separately, side plates are set on both sides of the roller table, and a bridge is set in the middle.The roller is a hollow roller, and the roller deck and side plate are welded structural parts.YASKAWA a1000 frequency converter control, forward and reverse
Lubrication: reducer oil pool lubrication.The roller bearings are manually lubricated with dry oil.
Cooling: roller body spray cooling.
3、 Roughing area equipment
1. Rough rolling inlet roller table
Roller size:φ295mm, the wall thickness of steel pipe is 35 mm
Working face: 1400mm
Number of rolls: 13 rolls
Spacing: 800mm
Motor: yga160s1-6 3KW 13 sets
Reducer: zd20 speed ratio i = 4 13 sets
structure characteristics;The AC speed regulating motor drives separately, side plates are set on both sides of the roller table, and a bridge is set in the middle.The roller is a hollow roller, and the roller deck and side plate are welded structural parts.YASKAWA a1000 frequency converter control, forward and reverse
Lubrication: reducer oil pool lubrication.The roller bearings are manually lubricated with dry oil.
Cooling: roller body spray cooling.
2. Front centering side guide plate of roughing mill
Purpose: the side guide plate is located in front of 750 two high reversible rolling mill;Its function is to align the continuous casting billet and guide the continuous casting billet into the roughing flat roll mill.
performance parameter
The centering side guide plate is hydraulically driven rack and pinion type.
The guide plate is composed of push plate, guide roller, upper and lower push rods and transmission device.Racks are installed on the upper and lower push rods,
The gears mesh with the upper and lower racks at the same time to ensure the synchronous action of the two push rod devices, and the guide plate on the transmission side is installed
On the upper push rod, the operating side guide plate is installed on the lower pull rod.When the hydraulic cylinder extends, it drives the upper push rod to push forward,
Through the action of the gear, the pull-down rod is driven to pull back, so that the guide plates on the transmission side and the operation side are synchronized and symmetrically close to the rolling center line.On the contrary, when the hydraulic cylinder shrinks, the guide plates on the transmission side and the operation side are synchronized and symmetrically opened on the rolling center line.The opening of the side guide plate is detected and controlled by the sensor.
Type: | Hydraulically driven rack and pinion type | |
Minimum working opening | mm | 400 |
Maximum working opening | mm | 800 |
Hydraulic cylinder | number | 2 |
Cylinder diameter / rod diameter | mm | Φ125/70 |
Maximum working stroke | mm | 300 |
Maximum centering force (one side) | kN | 250 |
3. Roughing mill
Mill Name: 750 two high reversible mill
Application: the 150 mm thick continuous casting billet is rolled into 30-40 mm thick intermediate billet through 5 passes
Quantity: 1 set
Performance parameters:
Type: horizontal transmission electromechanical screwdown
Roll balance mode: hydraulic drive upper balance
Roll diameter:φ820mm。Roll body length: 780mm
Work roll change mode: the flat plate trolley device driven by hydraulic cylinder pulls out the roll change;
Transmission shaft: cross universal shaft swc780-680wf * 3500 2 setting brackets (hydraulic balance)
Alignment box: model 850, 1 set with hard tooth surface
Motor: Harbin electric z2500 / 14004200kw, 5160a, 900v, 60 / 120 rpm, 1 set
A bridge crossing device is set between rough rolling and vertical rolling, and free rollers are equipped at both ends of the bridge
4. Roughing vertical roll mill
Purpose: it is arranged together with R1 flat roll mill to control the width of billet edge.
Type: upper drive, two vertical motors drive the combined reducer to drive the roll to rotate.
Performance parameters:
The side pressure device is driven by the hydraulic cylinder servo valve;Set hydraulic AWC and SSC functions.A displacement sensor is arranged in the side pressure oil cylinder.
Roll diameter:φ650mm。Roll body length: 395mm
Roll balance mode: hydraulic cylinder drive control balance.
Roll changing device of vertical roll mill: the frame device is pulled out as a whole.
Vertical roll mill drive shaft: two cross universal joint shafts swc390bh-1903
Set the axle lifting device (driven by hydraulic cylinder).
Main reducer: hard tooth surface reducer is adopted;The high-speed shaft adopts domestic high-quality bearings.
Motor: z4-355-22361kw, 982a, 440V, 680 / 1600 rpm, 2 sets
5. Transport roller table behind roughing vertical roll
Purpose: to receive rolled pieces and transport them to the cutting shear direction.
Performance parameters:
Roller size:φ295 * 800mm, the wall thickness of steel pipe is 35mm
Number of rolls: 45
Roll spacing: 800mm
Motor: yga160s1-6 3kw
Reducer: zd20 speed ratio i = 4
structure characteristics;The AC speed regulating motor drives separately, side plates are set on both sides of the roller table, and a bridge is set in the middle.The roller is a hollow roller, the roller neck is cooled by water spray, the roller deck frame and side plate are welded structural parts, and the roller deck is provided with a thermal insulation cover.YASKAWA a1000 frequency converter control, forward and reverse
Lubrication: reducer oil pool lubrication.Manual dry oil lubrication of roller bearing
4.Finishing mill equipment
1
The head cutting flying shear is installed before the finishing vertical roll to cut off the irregular head and tail before the intermediate strip enters the finishing mill.
Model: qa95-300 1 set
Intermediate strip specification (thickness)×Width): max40×600 mm
Shear force: 3000 kn
Shear temperature: ≥ 900 ℃
Cutting edge length: 650mm
Cutting edge replacement method: online cutting edge replacement
Waste collection: the waste enters the hopper through the chute and is lifted away by the crane.
2
Performance parameters:
Roller size:φ295 * 800mm, the wall thickness of steel pipe is 35mm
Number of rolls: 5
Roll spacing: 800mm
Motor: yga160s1-6 3kw
Reducer: zd20 speed ratio i = 4
structure characteristics;The AC speed regulating motor drives separately, side plates are set on both sides of the roller table, and a bridge is set in the middle.The roller is a hollow roller, the roller neck is cooled by water spray, the roller deck frame and side plate are welded structural parts, and the roller deck is provided with a thermal insulation cover.YASKAWA a1000 frequency converter control, forward and reverse
Lubrication: reducer oil pool lubrication.Manual dry oil lubrication of roller bearing
3. F1E finishing vertical roll mill
Purpose: it is arranged before finishing rolling F1 to control the width of billet edge.
Type: upper drive, two vertical motors drive the combined reducer to drive the roll to rotate.
Performance parameters:
The side pressure device is driven by the hydraulic cylinder servo valve;Set hydraulic AWC and SSC functions.A displacement sensor is arranged in the side pressure oil cylinder.
Roll diameter:φ500mm。Roll body length: 240mm
Roll balance mode: hydraulic cylinder drive control balance.
Roll changing device of vertical roll mill: the frame device is pulled out as a whole.
Vertical roll mill drive shaft: cross universal joint shaft swc280ch-1901 * 1300 + 350;Article 2
Set the axle lifting device (driven by hydraulic cylinder).
Main reducer: hard tooth surface reducer is adopted;The high-speed shaft adopts domestic high-quality bearings.
Motor: z4-315-11132kw, 344A, 440V, 500 / 1600 rpm
4. Finishing two high mill (F1)
The rolling mill frame is integrally cast and made of high-quality medium carbon structural steel. The two sides of the window are bolted to the frame lining plate, and the material is 40Cr,
Quantity: 1 set
Performance parameters:
Type: horizontal drive
Pressing mode: Hydraulic AGC pressing
Roll balance mode: hydraulic drive upper balance
Roll diameter:φ680mm。Roll body length: 730mm
Work roll change mode: the flat plate trolley device driven by hydraulic cylinder pulls out the roll change;
Transmission shaft: cross universal shaft swc780-680wf * 3500 2
Setting bracket (hydraulic balance)
Alignment box: model 850, 1 set with hard tooth surface
Main reducer: hard tooth surface reducer is adopted;Domestic high-quality bearings are adopted.1 set
Motor: dc2250kw, 1 set
5. Finishing four high mill (f2-f9)
Main technical data:
The rolling mill frame is integrally cast and made of high-quality medium carbon structural steel. The two sides of the window are bolted to the frame lining plate, which is made of 40Cr. Guide devices are set at the front and rear of the rolling mill.Rolling mill connecting beam is set between stands.
Quantity: 8
Performance parameters:
Type: horizontal transmission
Pressing mode: Hydraulic AGC pressing
Roll balance mode: hydraulic drive upper balance
Backup roll diameter:φ660mm。Roll body length: 730mm
Work roll diameter:φ410 roll body length: 750mm
Work roll change mode: the flat plate trolley device driven by hydraulic cylinder pulls out the roll change;
Transmission connecting shaft: two cross universal connecting shafts swc440wf-390-350 * 2782
Setting bracket (hydraulic balance)
Tooth box: model 450, 8 sets of hard tooth surfaces
Reducer: model 1200, 7 sets with hard tooth surface
Motor: dc2250kw, 2 sets
Dc1600kw upper backpack water cooling 6 sets
6. Electric looper
Purpose: to support the strip steel and absorb the set amount caused by the dynamic speed drop caused by steel biting;And make the strip steel form tension between frames;Participate in speed control of finishing mill.
Quantity: 6 sets
Main technical data:
Motor: zzj-806, 22.4kw, 440V, 56a, 220V, 3.03a, 650 / 1300 rpm, 6 sets
Reducer: ZL50 6 sets
7. rear output roller table of finishing mill
Purpose: used to receive and transport finished strip steel after finishing rolling.
Roller specification:фtwo hundred and fifteen×750mm
Quantity: 82
Transmission mode: AC variable frequency motor direct transmission
Motor: AC variable frequency motor ygp132m2-4 1450r / min 2.2kw
Control Description: manually control the forward and reverse rotation, start and stop of roller table.
structure characteristics
Each roller assembly includes roller, bearing seat, coupling and motor.The roller is of hollow structure.The upper part of the roller is provided with a side plate, which is installed on the transmission side and the operation side.The motor is equipped with a protective cover to prevent cooling water from splashing onto the motor.
The output roller table roller is water-cooled by external spray.
Bearing lubrication: manual dry oil lubrication
5、 Coiling area equipment
1Front guide plate of coiler
Guide plate opening: 400 ~ 800 mm
Moving speed: 100 / 200mm / s, hydraulically driven.
Side guide hydraulic cylinder:Φ125/Φseventy×300 mm 2 sets
The equipment is composed of inclined section guide plate, parallel section guide plate, transmission device, etc.
The equipment is symmetrically arranged by the operation side and the transmission side.A hydraulic cylinder drives the guide plate device to move in parallel on each side;The parallel section guide plate drives the inclined section guide plate to swing around the fixed hinge point;The hydraulic cylinders on both sides move synchronously;The alignment of strip steel can be realized.The guide plate device drives the push rod device and drives the synchronous shaft through the synchronous gearbox to ensure the parallel movement of the guide plate device.
The transmission device is composed of synchronous gearbox, synchronous shaft, push rod device, hydraulic cylinder transmission device, rail seat, etc.
Lubrication: including automatic dry oil lubrication and manual dry oil lubrication.
3. Centering roller table at the front entrance of coiler
Roller specification:фtwo hundred and fifteen×750mm
Quantity: 8
Transmission mode: AC variable frequency motor direct transmission
Motor: AC variable frequency motor ygp132m2-4 1450r / min 2.2kw
structure characteristics
Each roller assembly includes roller, bearing seat, coupling and motor.The roller is of hollow structure.The upper part of the roller is provided with a side plate, which is installed on the transmission side.The motor is equipped with a protective cover to prevent cooling water from splashing onto the motor.
The output roller table roller is water-cooled by external spray.
4Pinch roll
Pinch roll: upper rollΦsix hundred and five×800 mm 1 piece
Lower rollΦthree hundred and five×800 mm 1 piece
Pinch roll motor: z4-315-21160kw, 440V, 413a, 180V, 22.8a, 500 / 1500 rpm
The equipment is installed on the upper part of the entrance side of the underground coiler. Before the strip steel enters the coiler, the head of the strip steel is bent to guide the strip steel into the coiler.At the same time, the tension between the finishing mill and the coiler shall be established to ensure good coiling quality.
The transmission of the upper and lower rollers is directly driven by the motor through the universal joint shaft.The roll gap adjustment is realized by the hydraulic cylinder installed on the frame to drive the upper roll bearing seat to move up and down.
A guiding guard plate and a pressing roller device are arranged on the inlet side of the pinch roll to protect the tail of the strip steel from damage. An outlet valve is installed on the outlet side to guide the strip steel into the coiler;It can also prevent the strip steel from flying out
Pinch roll is mainly composed of frame assembly, upper pinch roll device, lower pinch roll device, pinch roll drive device, etc.
The frame adopts thick steel plate welding structure.
The upper pinch roll is a hollow roll, the roll surface is overlaid, and the roller bearing is a roller bearing.
The lower pinch roll is a solid roll, the roll surface is overlaid, and the roller bearing is a roller bearing.
Lubrication: the bearing is centralized dry oil lubrication, and the pressure of the system is 20MPa.
5. Coiler
Coiler type: full hydraulic four auxiliary coiler
Strip thickness×Width: 1.8-8.0×450－600 mm
Coil inner diameter:Φ530mm
Outer diameter of steel coil:Φ1250～Φ1880 mm
Coiling speed: Max 13 m / S
Coiling temperature: 550 ~ 650 ° C;
Drum: plunger connecting rod type, length 800 mm, 1 piece
Maximum expansion diameter of drum:Ф530 mm
Normal diameter reduction of drum:Ф485 mm
Drum expansion and contraction hydraulic cylinder:Ф320/Ф180/Фone hundred and twenty×73.86mm 1 piece
Working pressure: P = 6Mpa
Auxiliary winding roller:
1Hydraulic cylinder of No. 2 auxiliary winding roller: zq-125 / 90 * 620 1 piece
2Hydraulic cylinder of No. 2 auxiliary winding roller: zq-125 / 90 * 620 1 piece
3Hydraulic cylinder of No. auxiliary winding roller: zq-125 / 90 * 390 1 piece
4Hydraulic cylinder of No. auxiliary winding roller: zq-125 / 90 * 390 1 piece
Drum motor: z4-355-22250kw, 623a, 440V, 750 / 1600 rpm, 1 set
Auxiliary winding roller motor: zzj-806, 22.4kw, 440V, 56a, 220V, 3.03a, 650 / 1300 rpm, 4 sets
The coiler is a dual-purpose coiler that can coil steel from thin specification to thick specification.
The coiler is mainly composed of frame assembly, external support device, coiler device, coiler arm device (1#, 2#, 3#, 4#), coiler drive device, drum device, drum drive device, etc.
Type: hydraulic cylinder driven trolley walking type
Coil temperature: 550 ℃ - 650 ℃.
structure characteristics
The equipment is composed of lifting device, traveling device, track, stroke control device, drag chain bench and piping.
The lifting device is composed of lifting frame and hydraulic cylinder.The lifting frame is welded into a closed frame by steel plate.
A limit switch is installed on the track to send a signal to the final position to control the start point and end point of action.Alloy steel forgings for wheels and axles.
The track is composed of welded H-section steel, and safety buffers are set at both ends of the track;The traveling mechanism is placed on the frame, which is a welded structure.
Roller size:Фtwo hundred and forty×800 mm
Number of rollers: 6
Motor: AC variable frequency motor ygp132m2-4 1450r / min 2.2kW 6 sets
2The inlet roller table of No. 2 coiler is located in front of the pinch roller at the inlet of No. 2 coiler to transport the strip steel to the underground coiler.A side guide plate is installed on the roller table, and the structure, side guide plate, coiler and other equipment of the roller table are the same as those of the 1# coiler
6、 Configuration list of public and auxiliary water supply and drainage system
Water supply and drainage equipment list | ||||
Serial number | Equipment name | Specification and model | Company | quantity |
one | Clean circulating water pump station | |||
1 | Clean annular feedwater pump set | XA150/26 | platform | 3 |
electromotor | Y200L-4,30Kw | platform | 3 | |
2 | Heater feed pump set | XA150/26 | platform | 3 |
electromotor | Y200L-4,30Kw | platform | 3 | |
3 | Dephosphorization pump feed pump set | XA150/26 | platform | 2 |
electromotor | Y200L-4,30Kw | platform | 2 | |
two | Turbid ring water pump station | |||
1 | Finishing mill feed pump set | XA200/32 | platform | 3 |
electromotor | JS-180S-4 | platform | 3 | |
2 | Finishing mill feed pump set | XA200/26 | platform | 3 |
electromotor | Y250M-4,55Kw | platform | 3 | |
three | Rough rolling sump | |||
1 | Rough rolling return water pump set | XA200/26 | ||
electromotor | Y250M-4,55Kw | platform | 2 | |
four | Coiling sump | |||
1 | Coiling return water pump set | XA200/32 | platform | 5 |
electromotor | JS-180S-4 | platform | 5 | |
Configuration list of electric control system | ||||||
Serial number | name | to configure | quantity | Company | Power kw | |
1 | Hydraulic pusher | 3Two hydraulic pumps, one for use and one for standby, and two frequency converters | 1 | set | 55Kw | |
2 | Steel jacking machine | 1 | set | 18.5Kw | ||
3 | Heating furnace blower | Two frequency converters, one for use and one for standby | 2 | set | 280Kw | |
4 | Induced draft fan | 1 control frequency converter | 1 | set | 132Kw | |
5 | Drum feed pump | One for use and one for standby | 2 | set | 15Kw | |
6 | Outlet roller table of heating furnace | 6Three motors are driven by chain and controlled by three frequency converters | 40 | group | 18.5Kw | |
7 | Phosphorus removal roller table | Single transmission, one Yaskawa a1000 frequency converter | 13 | group | 3Kw | |
8 | Phosphorus breaker | One set of startup cabinet of hydropower unit | 1 | set | 800Kw | |
9 | Phosphorus removal pump | Plunger pump 3 for use and 1 for standby, 4 ABB Frequency Converters | 4 | set | 355Kw | |
10 | Front roller table of roughing mill | Single transmission, one Yaskawa a1000 frequency converter | 38 | group | 3Kw | |
11 | Front centering device of roughing mill | One set of hydraulic station | 1 | set | 5.5Kw | |
12 | Roughing reversing mill | Siemens 6ra80 control system | 1 | set | 4200Kw | |
13 | Roughing reversible vertical roll mill | AWC side voltage, Siemens 6ra80 control system, 2 DC motors | 1 | set | 361Kw | |
14 | Rear and shear roller table of roughing mill | Single transmission, 2 sets of Anchuan a1000 frequency converters | 45 | group | 3Kw | |
15 | ||||||
16 | Hot shear | Frequency converter control | 1 | set | 45Kw | |
17 | Finishing vertical roll mill | 2DC motor + AWC side voltage, Siemens 6ra80 control system | 1 | set | 132Kw | |
18 | Finishing mill F1 | AGC screwdown, Siemens 6RA70 control system | 1 | set | 2250Kw | |
19 | Finishing mill F2 | AGC screwdown, Siemens 6RA70 control system | 1 | set | 2250Kw | |
20 | Finishing mill F3 | AGC screwdown, Siemens 6RA70 control system | 1 | set | 2250Kw | |
21 | Finishing F4 mill | AGC screwdown, Siemens 6RA70 control system | 1 | set | 1600Kw | |
22 | Finishing mill F5 | AGC screwdown, Siemens 6RA70 control system | 1 | set | 1600Kw | |
23 | Finishing mill F6 | AGC screwdown, Siemens 6RA70 control system | 1 | set | 1600Kw | |
24 | Finishing F7 mill | AGC screwdown, Siemens 6RA70 control system | 1 | set | 1600Kw | |
25 | Finishing mill F8 | AGC screwdown, Siemens 6RA70 control system | 1 | set | 1600Kw | |
26 | Finishing F9 mill | AGC screwdown, Siemens 6RA70 control system | 1 | set | 1600Kw | |
27 | 1# looper | Siemens 6ra80 control system | 1 | set | 37Kw | |
28 | 2# looper | Siemens 6ra80 control system | 1 | set | 37Kw | |
29 | 3# looper | Siemens 6ra80 control system | 1 | set | 22.4Kw | |
30 | 4# looper | Siemens 6ra80 control system | 1 | set | 22.4Kw | |
31 | 5# looper | Siemens 6ra80 control system | 1 | set | 22.4Kw | |
32 | 6# looper | Siemens 6ra80 control system | 1 | set | 22.4Kw | |
33 | Width gauge | Dalian yataihua | 2 | platform | ||
34 | Coiling transport roller table | Single transmission, 4 sets of Anchuan a1000 frequency converters | 82 | group | 2.2Kw | |
35 | Coiler | 2 sets of horizontal cored coiling and 2 sets of Siemens 6RA70 control system | 2 | set | 250Kw | |
36 | 2# centering roller table | Single pass, one Schneider frequency converter | 6 | group | 2.2Kw | |
37 | High and low voltage thin oil station of roughing mill motor | High voltage one for use and one for standby, low voltage one for use and one for standby | 1 | set | 30Kw | |
38 | Roughing hydraulic station | 2 roll change pumps and 2 balance pumps | 1 | set | 30Kw | |
39 | Rough rolling lubrication station | One for use and one for standby | 1 | set | 30Kw | |
40 | Roughing AGC hydraulic station | One for use and one for standby | 1 | set | 55Kw | |
41 | Finish rolling AGC hydraulic station | Three for use and two for standby | 1 | set | 55Kw | |
42 | Finishing hydraulic station | 2 roll change pumps and 2 balance pumps | 1 | set | 30Kw | |
43 | Finish rolling lubrication station | One for use and one for standby | 1 | set | 30Kw | |
44 | Coiling hydraulic station | Three for use and two for standby | 1 | set | 55Kw | |
45 | Coiling lubrication station | One for use and one for standby | 1 | set | 5.5Kw | |
46 | AGC screwdown control system for roughing mill | Siemens | 1 | set | ||
47 | AGC screwdown control system for finish rolling | Siemens, TDC | 1 | set | ||
8、 Electronic control system configuration
