A tension roll replacement hoisting device for a cold rolling mill

Abstract

This utility model discloses a tension roll replacement hoisting device for a cold rolling mill, including a main beam, a transmission mechanism, a traveling mechanism, and a counterweight. The transmission mechanism is installed on one side of the main beam, and the counterweight and the traveling mechanism are both connected to the lead screw nut of the transmission mechanism. The wheels of the traveling mechanism roll on the main beam. Two tension roll lifting lugs are provided at the lower end of the other side of the main beam, and two or more overhead crane hoisting holes are provided at the middle of the top of the main beam. This utility model allows for direct replacement without the need to hoist the closed cover plate, improving operational safety and work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of cold rolling equipment maintenance technology, and more specifically, to a lifting device for replacing tension rolls in a cold rolling mill. Background Technology

[0002] Most sheet and strip production currently employs continuous coil production. In the strip steel production process, tension rolls, as a crucial component, play a vital role in the sheet and strip production line. They are widely used in pickling and rolling, hot-dip galvanizing, electro-galvanizing, continuous annealing furnace, and recoiling production lines.

[0003] As the production line operates continuously, the surface roughness of the tension rollers naturally decreases due to wear, making it easy for the roller surface to slip against the strip steel. This directly affects the surface quality of the strip steel, requiring regular inspection, maintenance, and replacement of the tension rollers.

[0004] However, in order to improve product quality requirements, the exit section of each production line is designed with dustproof enclosures, which makes roller changing inconvenient. Before changing the roller, the enclosure cover must be lifted out before it can be replaced, and after the roller is replaced, it must be reset. This involves too much high-altitude work, which is dangerous, particularly unsafe, and also labor-intensive, time-consuming, and costly. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a lifting device for replacing tension rolls in cold rolling mills, which allows for direct replacement without the need to lift the closed cover plate, thereby improving operational safety and work efficiency.

[0006] The present invention adopts the following technical solution:

[0007] This utility model discloses a tension roll replacement and hoisting device for a cold rolling mill, including a main beam, a transmission mechanism, a traveling mechanism, and a counterweight. The transmission mechanism is installed on one side of the main beam. The counterweight and the traveling mechanism are both connected to the lead screw nut of the transmission mechanism. The wheels of the traveling mechanism roll on the main beam. Two tension roll lifting lugs are provided at the lower end of the other side of the main beam. Two or more overhead crane hoisting holes are provided at the middle of the top of the main beam.

[0008] Furthermore, the main beam includes an upper beam plate and a lower beam plate. Baffles are installed at the rear ends of the upper beam plate and the lower beam plate. Stiffeners are installed at the upper and lower ends of the upper beam plate. The crane hoisting hole is located at the middle of the upper end of the baffle plate. Tension roller lifting lugs are installed at the lower end of the lower beam plate.

[0009] Furthermore, the transmission mechanism also includes a motor and a motor base. The bottom of the motor base is installed at one end of the upper beam plate, and the motor is installed on the motor base. Two bearing seats are installed at the bottom of the lower beam plate, and lead screws are installed at the two bearing seats. Sprockets are installed at the ends of the lead screws and the motor. A chain is installed between the two sprockets, and a lead screw nut is installed on the lead screw. The top of the counterweight is connected to the lead screw nut.

[0010] Furthermore, the traveling mechanism includes a transfer plate, the upper beam plate has a transfer plate through groove, the bottom of the transfer plate is connected to the top of the counterweight block by fasteners, the upper end of the transfer plate is connected to a wheel, and the wheel is located between the upper beam plate and the lower beam plate.

[0011] Furthermore, two impact plates are installed on the upper beam plate, and the transition plate is located between the two impact plates.

[0012] Furthermore, a control box is installed on the baffle, which is electrically connected to the motor, and a handle controller is connected to the control box.

[0013] Furthermore, a support frame is provided at the lower end of the lower beam plate on one side relative to the counterweight block.

[0014] Beneficial effects

[0015] This invention allows for direct replacement of the cover plate without the need for hoisting, improving operational safety and work efficiency. It can also be applied to hoisting operations of equipment such as steering rollers and ground rollers, demonstrating the device's multi-functionality, reducing the risks of working at heights, and simplifying the approval process for obtaining high-altitude work permits. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the tension roller in a suspended state according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of a tension roller replacement hoisting device according to an embodiment of the present invention.

[0018] Figure 3 for Figure 2 Schematic diagram of AA.

[0019] Figure 4 for Figure 2 Diagram of BB in the middle. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] As shown in the figure, this utility model discloses a tension roll replacement and hoisting device for a cold rolling mill, including a main beam 1, a transmission mechanism 2, a traveling mechanism 3, and a counterweight 4. The transmission mechanism 2 is installed on one side of the main beam 1. The counterweight 4 and the traveling mechanism 3 are both connected to the lead screw and nut of the transmission mechanism. The wheels 31 of the traveling mechanism 3 roll on the main beam 1. Two tension roll lifting lugs 5 are provided at the lower end of the other side of the main beam 1. Several overhead crane hoisting holes 101 are provided at the middle of the top of the main beam 1.

[0022] This utility model utilizes a crane to move the entire hoisting device, then uses the tension roller lug 5 of the hoisting device to lift the tension roller C, then uses the counterweight 4 to lift the tension roller C, and then uses the crane to move the entire hoisting device, thereby moving the tension roller C and realizing the removal of the tension roller C.

[0023] In one embodiment of this utility model, the main beam 1 includes an upper beam plate 11 and a lower beam plate 12. Baffles 13 are installed at the rear ends of both the upper and lower beam plates 11. Rib plates 14 are installed at both the upper and lower ends of the upper beam plate 11. A crane lifting hole 101 is located at the middle of the upper end of the baffle 13. Tension roller lifting lugs 5 are installed at the lower end of the lower beam plate 12. The rib plates 14 serve to strengthen the connection between the baffle 13 and the upper beam plate 11, and between the baffle 13 and the lower beam plate 12. The baffle 13 also serves to connect the upper beam plate 11 and the lower beam plate 12.

[0024] In one embodiment of this utility model, the transmission mechanism 2 further includes a motor 21 and a motor base 22. The bottom of the motor base 22 is installed at one end of the upper beam plate 11. The motor 21 is installed on the motor base 22. Two bearing seats 23 are installed at the bottom of the lower beam plate 12. A lead screw 24 is installed at the two bearing seats 23. A sprocket 25 is installed at the end of the lead screw 24 and the end of the motor 21. A chain 26 is installed between the two sprockets 25. A lead screw nut 27 is installed on the lead screw 24. The top of the counterweight 4 is connected to the lead screw nut 27.

[0025] When motor 21 is working, one sprocket 25 rotates, and through chain drive, the other sprocket 25 rotates. Sprocket 25 drives lead screw 24 to rotate, which in turn drives lead screw nut 27 to move linearly, which in turn drives counterweight 4 to move linearly.

[0026] In one embodiment of this utility model, the walking mechanism 3 includes a transition plate 32. The upper beam plate 11 is provided with a transition plate through groove. The bottom of the transition plate 32 is connected to the top of the counterweight 4 by fasteners. The upper end of the transition plate 32 is connected to a wheel 31, which is located between the upper beam plate 11 and the lower beam plate 12. The lead screw nut 27 simultaneously drives the transition plate 32 to move, and the transition plate 32 also drives the wheel 31 to move. The wheel 31 moves smoothly with the transition plate 32, ultimately making the counterweight 4 move smoothly.

[0027] In one embodiment of this utility model, two impact plates 15 are installed on the upper beam plate 11, and the transition plate 32 is located between the two impact plates 15. The two impact plates 15 serve to limit the movement of the transition plate 32.

[0028] In one embodiment of this utility model, a control box 7 is installed on the baffle 13. The control box 7 is electrically connected to the motor 21, and a handle controller 8 is connected to the control box 7.

[0029] In one embodiment of this utility model, a support frame 10 is provided at the lower end of the lower beam plate 12 on one side relative to the counterweight block 4. When not in use, one side of the lower beam plate 12 rests on the support frame 10.

[0030] The tension roller replacement and hoisting process is as follows:

[0031] Step S1: Use a wrench and hammer to remove the gearbox and tension roller coupling and safety cover;

[0032] Step S2: Remove the upper cover of the bearing housing;

[0033] Step S3: Hang the lifting device on the overhead crane trench 6;

[0034] Step S4: Operate the overhead crane trenching 6, and at the same time operate the handle controller 8 to adjust the hoisting device to a horizontal state;

[0035] Step S5: The crane moves to directly above the roller changing position;

[0036] Step S6: Connect the tension roller C to the hoisting device using the wire rope 9 and shackles;

[0037] Step S7: Use the jog operation to straighten the wire rope and apply slight force;

[0038] Step S8: Operate the controller to move the counterweight backward, slightly lifting the tension roller;

[0039] Step S9: Operate the overhead crane to create a trench and hoist the tension roller to the designated placement position;

[0040] Step S10: The crane returns to the trench, and at the same time, the controller is operated to move the counterweight forward and adjust the lifting device to a horizontal state;

[0041] Step S11: Repeat steps S5-10 to perform the next tension roller hoisting operation;

[0042] Step S12: Operate the overhead crane to lift the hoisting device to the designated placement position;

[0043] Step S13: Remove the wire rope connecting to the crane hook to complete the hoisting operation.

[0044] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A cold mill tension roll change hoisting device, characterized by: It includes a main beam, a transmission mechanism, a traveling mechanism, and a counterweight. The transmission mechanism is installed on one side of the main beam. The counterweight and the traveling mechanism are both connected to the lead screw and nut of the transmission mechanism. The wheels of the traveling mechanism roll on the main beam. Two tension roller lugs are provided at the lower end of the other side of the main beam. Two or more overhead crane lifting holes are provided at the middle of the top of the main beam.

2. A cold rolling mill tension roll replacement hoisting device according to claim 1, characterized in that: The main beam consists of an upper beam plate and a lower beam plate. Baffles are installed at the rear ends of the upper and lower beam plates. Stiffeners are installed at both the upper and lower ends of the upper beam plate. The crane hoisting hole is located at the middle of the upper end of the baffle plate. Tension roller lifting lugs are installed at the lower end of the lower beam plate.

3. A cold rolling mill tension roll replacement hoisting device according to claim 2, characterized in that: The transmission mechanism also includes a motor and a motor base. The bottom of the motor base is installed at one end of the upper beam plate. The motor is installed on the motor base. Two bearing seats are installed at the bottom of the lower beam plate. A lead screw is installed at the two bearing seats. A sprocket is installed at the end of the lead screw and the end of the motor. A chain is installed between the two sprockets. A lead screw nut is installed on the lead screw. The top of the counterweight is connected to the lead screw nut.

4. A cold rolling mill tension roll replacement hoisting device according to claim 3, characterized in that: The traveling mechanism includes a transfer plate. The upper beam plate has a transfer plate through groove. The bottom of the transfer plate is connected to the top of the counterweight block by fasteners. The upper end of the transfer plate is connected to a wheel, which is located between the upper beam plate and the lower beam plate.

5. A cold rolling mill tension roll replacement hoisting device according to claim 4, characterized in that: Two impact plates are installed on the upper beam plate, and the transition plate is located between the two impact plates.

6. A cold rolling mill tension roll replacement hoisting device according to claim 5, characterized in that: A control box is installed on the baffle. The control box is electrically connected to the motor, and a handle controller is connected to the control box.

7. A cold rolling mill tension roll replacement hoisting device according to claim 2, characterized in that: A support frame is provided at the lower end of the lower beam plate on the side opposite to the counterweight block.

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