A device for replacing backup rolls of a hot rolling coil finishing mill and a method for replacing the same

Abstract

The present invention relates to a device for replacing a backup roll of a hot rolling coil finishing mill and a method for replacing the same, belonging to the technical field of hot rolling coil finishing mill equipment in the metallurgical industry. The technical solution is as follows: it includes a gantry part, an upper backup roll supporting part, and a lower backup roll supporting part; the gantry part includes two identical gantry frames, and the gantry frame is a gantry structure formed by connecting two portal columns (4) and a cross beam (5), and the distance between the two portal columns (4) matches the backup roll of the finishing mill; the upper backup roll supporting part includes an upper support bracket (13-5), a lower support bracket (13-6), and a support bracket slideway (14) arranged between the two gantry frames; the lower backup roll supporting part includes brackets (2), support brackets (2-1), and support bracket rotating shafts (2-2) arranged below each portal column (4) in the gantry frame. The beneficial effects of the present invention are: facilitating the disassembly, assembly, and handling of the backup roll of the finishing mill, being safe and reliable, and improving work efficiency.

Description

Technical Field

[0001] The present invention relates to a device for replacing backup rolls of a hot rolling coiled sheet finishing mill and a method for replacing the same, belonging to the technical field of hot rolling coiled sheet finishing mill equipment in the metallurgical industry. Background Art

[0002] The hot rolling coiled sheet finishing mill is a four-high rolling mill, including two work rolls and two backup rolls. The two backup rolls are respectively located above and below the two work rolls, and a cover plate is provided above the lower backup roll. After the finishing mill has rolled for a certain period of time, it is necessary to inspect, repair, and replace the backup rolls. The inspection of the backup rolls includes surface quality, roll diameter, roundness, curve deviation, etc. When inspecting, repairing, and replacing the backup rolls, it is necessary to first disassemble the two backup rolls from the rolling mill housing, and then reinstall them onto the rolling mill housing after repair.

[0003] Currently, there is no dedicated replacement device for the backup rolls. The replacement mainly adopts the method of hoisting and transporting with an electric fixture. The specific roll-changing process includes: lifting the cover plate, pushing out the lower backup roll horizontally from the rolling mill housing using a hydraulic cylinder, and then transporting the lower backup roll to a designated position using an electric fixture; then dropping the upper backup roll from above the rolling mill housing to the bottom of the housing, and then pushing out the upper backup roll using a hydraulic cylinder and transporting the lower backup roll to a designated position using an electric fixture. Each step requires alignment and replacement of the hoisting device, and the backup rolls need to be transported multiple times using an electric fixture, resulting in a high failure rate of the electric fixture. There are multiple stands of the same finishing mill, which takes a long time, and there are unsafe factors such as falling objects hitting people and high-altitude falls during operation. Summary of the Invention

[0004] The purpose of the present invention is to provide a device for replacing backup rolls of a hot rolling coiled sheet finishing mill and a method for replacing the same, which is convenient for disassembling, installing, and transporting the backup rolls of the finishing mill, safe and reliable, improves work efficiency, and solves the problems in the background art.

[0005] The technical solution of the present invention is as follows:

[0006] A device for replacing backup rolls of a hot rolling coiled sheet finishing mill includes a gantry part, an upper backup roll supporting part, and a lower backup roll supporting part;

[0007] The gantry part includes two identical gantries. The gantry is a gantry structure formed by connecting two portal columns and a crossbeam. The distance between the two portal columns matches the backup rolls of the finishing mill. The crossbeams of the two gantries are connected by a top beam, and a hook is provided on the top beam;

[0008] The upper support roller bearing part includes an upper bracket support, a lower bracket support, and a bracket support slideway disposed between two gantry frames. The upper bracket support is fixed to the lower bracket support through a vertical support. The lower bracket support is horizontally slidably connected to the bracket slideway through a bracket support pulley. The bracket slideway is in a horizontal state and is vertically slidably connected to the T-shaped frame slideway through a T-shaped frame pulley and a T-shaped frame. The T-shaped frame slideway is integrally structured with the gantry frame column.

[0009] The lower support roller bearing part is located below the upper support roller bearing part. The lower support roller bearing part includes a bracket, a bearing bracket, and a bearing bracket rotating shaft disposed below each gantry frame column. The bearing bracket is rotatably connected to the bracket through the bearing bracket rotating shaft. The bracket is integrally structured with the T-shaped frame slideway in the upper support roller bearing part.

[0010] The composition further includes a lifting part for the lower support roller cover plate of the finishing mill. The lifting part for the lower support roller cover plate of the finishing mill is disposed below the lower support roller bearing part. The lifting part for the lower support roller cover plate of the finishing mill includes a position guiding block, a wire rope with a hook, a bottom beam, and a wire rope hanging ring. The position guiding block is integrally structured with the bracket, the T-shaped frame slideway, and the gantry frame column. The brackets below the two gantry frame columns are connected by the bottom beam. The bottom beam is provided with a wire rope hanging ring. One end of the wire rope with a hook is fixed to the position guiding block, and the other end of the wire rope with a hook is hooked on the wire rope hanging ring.

[0011] The gantry frame column in the gantry frame part, the T-shaped frame slideway in the upper support roller bearing part, the bracket in the lower support roller bearing part, and the position guiding block in the lifting part for the lower support roller cover plate of the finishing mill are all channel steels of an integral structure.

[0012] There are two hooks on the top beam. A two-way hook guiding bottom plate that cooperates with the overhead crane hook is further provided between the two hooks. The two-way hook guiding bottom plate is rotatably connected to the top beam. The two-way hook guiding bottom plate is provided with a two-way hook placement groove and a direction pointer.

[0013] The two-way hook placement groove on the two-way hook guiding bottom plate is located at both ends of the two-way hook guiding bottom plate, and the direction pointer is located in the middle of the two-way hook guiding bottom plate.

[0014] Support roller anti-slip plates are respectively provided on the upper bracket support and the lower bracket support in the upper support roller bearing part. Bracket support slideway anti-slip teeth are provided on the bracket support slideway.

[0015] Bracket support anti-slip teeth are provided on the bearing bracket in the lower support roller bearing part.

[0016] A method for replacing the support roller of a hot-rolled coil finishing mill uses a support roller replacement device for a hot-rolled coil finishing mill defined above and operates according to the following steps:

[0017] ①Use the overhead crane to lift the device to one side of the finishing mill housing, aligning the lower support roll bearing part with the lower support roll in the mill housing;

[0018] ②Use the hydraulic cylinder to push the lower support roll from the mill housing onto the support bracket in the lower support roll bearing part;

[0019] ③Lower the bracket support slideway in the upper support roll bearing part along the T-shaped frame slideway, fixing the lower bracket support on the lower support roll;

[0020] ④Use the hydraulic cylinder to send the lower support roll and the upper support roll bearing part together into the mill housing;

[0021] ⑤Lower the upper support roll onto the upper bracket support in the upper support roll bearing part;

[0022] ⑥Use the hydraulic cylinder to push the lower support roll, the upper support roll bearing part and the upper support roll together from the mill housing onto the support bracket in the lower support roll bearing part;

[0023] ⑦Use the overhead crane to lift the device together with the lower support roll and the upper support roll to the designated location, thus completing the disassembly of the finishing mill support roll;

[0024] ⑧The reinstallation of the lower support roll and the upper support roll of the finishing mill is opposite to the disassembly process.

[0025] Before step ②, first use the lifting part of the lower support roll cover plate of the finishing mill to cooperate with the overhead crane to lift the cover plate covering the upper part of the lower support roll.

[0026] The beneficial effects of the present invention are: convenient disassembly, assembly and handling of the finishing mill support roll, safe and reliable, and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the front view of the present invention;

[0028] Figure 2 is the schematic diagram of the bottom structure of the present invention;

[0029] Figure 3 is the exploded view of the bottom of the present invention;

[0030] Figure 4 is the schematic diagram of the retracted state of the lower support roll bearing part of the present invention;

[0031] Figure 5 is the schematic diagram of the opened state of the lower support roll bearing part of the present invention;

[0032] Figure 6 is the schematic diagram of the top structure of the present invention;

[0033] Figure 7 is the schematic diagram of the bearing cross-section of the present invention;

[0034] Figure 8 Schematic diagram of the upper support roll bracket and the bracket slideway of the present invention;

[0035] In the figure: position guiding block 1, hooked steel wire rope 1-1, bracket 2, bearing bracket 2-1, bearing bracket rotating shaft 2-2, anti-slip teeth 2-3 of the bearing bracket, partition baffle 2-4, T-shaped frame slideway 3, T-shaped frame pulley 3-1, T-shaped frame 3-2, portal frame column 4, cross beam 5, limit pulley bracket 5-1, limit pulley 5-2, top beam 6, bearing groove 6-1, screw hole 6-2, bearing 7, bearing column 8, bearing cover plate 9, middle hole 9-1 of the bearing cover plate, through hole 9-2 of the bearing cover plate, fixing screw 10, two-way hook guiding bottom plate 11, two-way hook placement groove 11-1, direction pointer 11-2, hook 12, safety belt fixing ring 12-1, vertical support 13-1, horizontal support 13-2, anti-slip plate 13-3 of the support roll, bracket supporting pulley 13-4, upper bracket support 13-5, lower bracket support 13-6, bracket support slideway 14, bracket support slideway baffle 14-1, anti-slip teeth 14-2 of the bracket support slideway, bottom beam 15, maintenance ladder 15-1, steel wire rope hanging ring 15-2, lower support roll 16, upper support roll 17. Detailed implementation manner

[0036] The present invention will be further described below with reference to the accompanying drawings and through examples.

[0037] Refer to the attached Figure 1-8 , a support roll replacement device for a hot-rolled coil finishing mill, comprising a portal frame part, an upper support roll bearing part and a lower support roll bearing part;

[0038] The portal frame part comprises two identical portal frames, and the portal frame is a portal structure formed by connecting two portal frame columns 4 and a cross beam 5. The distance between the two portal frame columns 4 matches the support roll of the finishing mill. The cross beams 5 of the two portal frames are connected by a top beam 6, and a hook 12 is provided on the top beam 6;

[0039] The upper support roll bearing part comprises an upper bracket support 13-5, a lower bracket support 13-6 and a bracket support slideway 14 arranged between the two portal frames. The upper bracket support 13-5 is fixed on the lower bracket support 13-6 through a vertical support 13-1. The lower bracket support 13-6 is horizontally slidably connected to the bracket slideway 14 through a bracket supporting pulley 13-4. The bracket slideway 14 is in a horizontal state, and the bracket slideway 14 is vertically slidably connected to the T-shaped frame slideway 3 through a T-shaped frame pulley 3-1 and a T-shaped frame 3-2. The T-shaped frame slideway 3 is an integral structure with the portal frame column 4;

[0040] The lower support roll bearing part is located below the upper support roll bearing part. The lower support roll bearing part includes brackets 2, bearing brackets 2-1 and bearing bracket rotating shafts 2-2 provided below each portal column 4 in the gantry. The bearing brackets 2-1 are rotatably connected to the brackets 2 through the bearing bracket rotating shafts 2-2. The brackets 2 and the T-shaped frame slideway 3 in the upper support roll bearing part are of an integral structure.

[0041] In this embodiment, it further includes a hoisting part for the lower support roll cover plate of the finishing mill. The hoisting part for the lower support roll cover plate of the finishing mill is arranged below the lower support roll bearing part. The hoisting part for the lower support roll cover plate of the finishing mill includes a position guiding block 1, a wire rope with a hook 1-1, a bottom beam 15 and a wire rope hanging ring 15-2. The position guiding block 1 and the brackets 2, the T-shaped frame slideway 3 and the portal column 4 of the gantry form an integral structure. The brackets 2 below the two portal columns 4 of the gantry are connected by the bottom beam 15. The bottom beam 15 is provided with the wire rope hanging ring 15-2. One end of the wire rope with a hook 1-1 is fixed on the position guiding block 1, and the other end of the wire rope with a hook 1-1 is hooked on the wire rope hanging ring 15-2.

[0042] The portal column 4 in the gantry part, the T-shaped frame slideway 3 in the upper support roll bearing part, the bracket 2 in the lower support roll bearing part and the position guiding block 1 in the hoisting part for the lower support roll cover plate of the finishing mill are channel steels of an integral structure.

[0043] Refer to the appendix Figure 1-5 , the bearing bracket 2-1 is connected to the bracket 2 through the bearing bracket rotating shaft 2-2. The upper surface of the bearing bracket 2-1 is provided with bearing bracket anti-slip teeth 2-3. The bracket 2 is provided with a partition blocking piece 2-4. The partition blocking piece 2-4 is provided with the T-shaped frame slideway 3. The T-shaped frame 3-2 slides inside the T-shaped frame slideway 3 through the T-shaped frame pulleys 3-1 on both sides.

[0044] The upper part of the portal column 4 of the gantry is connected to the limit pulley frame 5-1 below the gantry cross beam 5. Four limit pulleys 5-2 are installed in parallel inside the limit pulley frame 5-1.

[0045] Refer to Figure 6 , 7 , in the middle above the top beam 6, there is a bearing groove 6-1. Uniformly distributed screw holes 6-2 are provided around the bearing groove. A bearing 7 with an outer wall higher than the inner wall is embedded in the bearing groove 6-1. There is a bearing column 8 in the middle of the bearing 7. For the bearing cover 9, there is a bearing cover middle hole 9-1 in the middle part, which can pass through the bearing column 8. Bearing cover through holes 9-2 are provided around the bearing cover middle hole 9-1. The fixing screws 10 pass through the bearing cover through holes 9-2 and are fixed to the screw holes 6-2 of the top beam.

[0046] Refer to Figure 6, the two-way hook guide bottom plate 11 is fixed above the bearing column 8. There are two-way hook placement grooves 11-1 on both sides of the two-way hook guide bottom plate, and a direction pointer 11-2 is provided on one side of the middle part. Hooks 12 are provided on both sides of the bearing groove 6-1, and a safety belt fixing ring 12-1 is provided at the top of the hook 12.

[0047] Refer to Figure 1 , 8 , the upper support bracket 13-5 and the lower support bracket 15-6 are connected by a vertical bracket 13-1. The two vertical brackets 13-1 are connected by a horizontal bracket 13-2. Support roller anti-slip plates 13-3 are provided on the outside of the upper support bracket 13-5 and the lower support bracket 15-6. Bracket support pulleys 13-4 are symmetrically provided on both sides of the lower support bracket 13-6. The bracket support pulleys 13-4 slide in the bracket slideway 14. A bracket slideway baffle 14-1 is provided on the side of the bracket slideway 14 away from the rolling mill. Bracket slideway anti-slip teeth 14-2 are provided at the bottom of the bracket slideway 14. The bracket slideway 14 is connected to the T-shaped frame 3-2.

[0048] A bottom beam 15 is provided in the middle of the brackets 2 on the same side of the two gantry frames. Steel wire rope hanging rings 15-2 are provided in the middle of the bottom beams 15 on both sides. A maintenance ladder 15-1 is provided on one of the bottom beams 15.

[0049] When replacing the backup roll of the hot rolling coiled sheet finishing mill, the following steps are specifically followed for operation:

[0050] ① Use a crane to lift the device to one side of the finishing mill housing, and align the lower support roll bearing part with the lower support roll in the finishing mill housing.

[0051] ② Use the lifting part of the lower support roll cover plate of the finishing mill in cooperation with the crane to lift the cover plate covering the upper part of the lower support roll.

[0052] ③ Use a hydraulic cylinder to push the lower support roll from the finishing mill housing to the support bracket 2-1 in the lower support roll bearing part; and make the bracket slideway 14 in the upper support roll bearing part slide down along the T-shaped frame slideway 3, so that the lower support bracket 13-6 is fixed on the lower support roll.

[0053] ④ Use a hydraulic cylinder to send the lower support roll and the upper support roll bearing part together into the finishing mill housing.

[0054] ⑤ Lower the upper support roll onto the upper support bracket 13-5 in the upper support roll bearing part.

[0055] ⑥ Use a hydraulic cylinder to push the lower support roll, the upper support roll bearing part and the upper support roll together from the finishing mill housing to the support bracket 2-1 in the lower support roll bearing part.

[0056] ⑦ Use a crane to lift the device together with the lower support roll and the upper support roll to the designated location, that is, complete the disassembly of the backup roll of the finishing mill.

[0057] ⑧ The reinstallation of the lower backup roll and upper backup roll of the finishing mill is opposite to the disassembly process.

Claims

1. A hot rolling coil finishing mill backup roll replacement device, characterized in that: It includes a gantry part, an upper support roll bearing part and a lower support roll bearing part; The gantry part includes two identical gantries, and the gantry is a gantry structure formed by connecting two portal columns (4) and a cross beam (5). The distance between the two portal columns (4) matches the support roll of the finishing mill. The cross beams (5) of the two gantries are connected by a top beam (6), and a hook (12) is provided on the top beam (6); The upper support roll bearing part includes an upper support bracket (13-5), a lower support bracket (13-6) and a support bracket slideway (14) arranged between the two gantries. The upper support bracket (13-5) is fixed on the lower support bracket (13-6) through a vertical support (13-1). The lower support bracket (13-6) is horizontally slidably connected to the support bracket slideway (14) through a support bracket pulley (13-4). The support bracket slideway (14) is in a horizontal state. The support bracket slideway (14) is vertically slidably connected to a T-shaped frame slideway (3) through a T-shaped frame pulley (3-1) and a T-shaped frame (3-2). The T-shaped frame slideway (3) is integrally structured with the portal column (4) of the gantry; Support roll anti-slip plates (13-3) are respectively provided on the upper support bracket (13-5) and the lower support bracket (13-6) in the upper support roll bearing part; The lower support roll bearing part is located below the upper support roll bearing part. The lower support roll bearing part includes brackets (2), bearing brackets (2-1) and bearing bracket rotating shafts (2-2) arranged below each portal column (4) in the gantry. The bearing bracket (2-1) is rotatably connected to the bracket (2) through the bearing bracket rotating shaft (2-2). The bracket (2) is integrally structured with the T-shaped frame slideway (3) in the upper support roll bearing part; There are two hooks (12) on the top beam (6). A two-way hook guiding bottom plate (11) matching the overhead crane hook is also provided between the two hooks (12). The two-way hook guiding bottom plate (11) is rotatably connected to the top beam (6). A two-way hook placement groove (11-1) and a direction pointer (11-2) are provided on the two-way hook guiding bottom plate (11); The two-way hook placement groove (11-1) on the two-way hook guiding bottom plate (11) is located at both ends of the two-way hook guiding bottom plate (11), and the direction pointer (11-2) is located in the middle of the two-way hook guiding bottom plate (11).

2. The hot rolling coil finishing mill backup roll replacement device according to claim 1, characterized in that: The composition also includes a hoisting part for the lower support roll cover of the finishing mill. The hoisting part for the lower support roll cover of the finishing mill is arranged below the lower support roll bearing part. The hoisting part for the lower support roll cover of the finishing mill includes a position guiding block (1), a wire rope with a hook (1-1), a bottom beam (15) and a wire rope hanging ring (15-2). The position guiding block (1) is integrally structured with the bracket (2), the T-shaped frame slideway (3) and the portal column (4) of the gantry. The brackets (2) below the two portal columns (4) of the gantry are connected by the bottom beam (15). A wire rope hanging ring (15-2) is provided on the bottom beam (15). One end of the wire rope with a hook (1-1) is fixed on the position guiding block (1), and the other end of the wire rope with a hook (1-1) is hooked on the wire rope hanging ring (15-2).

3. The hot rolling coil finishing mill backup roll replacement device according to claim 2, characterized in that: The portal frame columns (4) in the portal frame part, the T-shaped frame slideway (3) in the upper support roller supporting part, the bracket (2) in the lower support roller supporting part, and the position guiding block (1) in the hoisting part of the lower cover plate of the finishing mill lower support roller are all channel steels of an integral structure.

4. A hot-rolled coil finishing mill backup roll replacement device according to claim 1 or 2, characterized in that: The bracket supporting slideway (14) is provided with bracket supporting slideway anti-slip teeth (14-2).

5. A hot-rolled coil finishing mill backup roll replacement device according to claim 1 or 2, characterized in that: The supporting bracket (2-1) in the lower support roller supporting part is provided with supporting bracket anti-slip teeth (2-3).

6. A method for replacing backup rolls of a hot rolling coil finishing mill, characterized in that: For a device for replacing the support roller of a hot-rolled coil finishing mill according to any one of claims 1-5, the operation is carried out according to the following steps: ① Use a crane to hoist the device to one side of the finishing mill housing, and align the lower support roller supporting part with the lower support roller in the finishing mill housing. ② Use a hydraulic cylinder to push the lower support roller from the finishing mill housing onto the supporting bracket (2-1) in the lower support roller supporting part. ③ Slide the bracket supporting slideway (14) in the upper support roller supporting part down along the T-shaped frame slideway (3) to fix the lower bracket support (13-6) on the lower support roller. ④ Use a hydraulic cylinder to send the lower support roller and the upper support roller supporting part together into the finishing mill housing. ⑤ Lower the upper support roller onto the upper bracket support (13-5) in the upper support roller supporting part. ⑥ Use a hydraulic cylinder to push the lower support roller, the upper support roller supporting part and the upper support roller together from the finishing mill housing onto the supporting bracket (2-1) in the lower support roller supporting part. ⑦ Use a crane to hoist the device together with the lower support roller and the upper support roller to a designated location, and the disassembly of the finishing mill support roller is completed. ⑧ The reinstallation of the lower support roller and the upper support roller of the finishing mill is opposite to the disassembly process.

7. A method for replacing the backup roll of a hot rolling coil finishing mill according to claim 6, characterized in that: Before step ②, first use the hoisting part of the lower cover plate of the finishing mill lower support roller to cooperate with the crane to lift the cover plate covering the upper part of the lower support roller.

Images