A changing device for a rolling mill backup roll

Abstract

The utility model provides a kind of replacement device for rolling mill backup roll.The utility model includes replacement subassembly and the backup roll pin cooperation of replacement subassembly, the backup roll pin includes pin head, steel wire rope connecting part and arc lifting lug, pin head, steel wire rope connecting part and arc lifting lug are sequentially connected, replacement subassembly includes handle portion, lengthening rod portion and hooking portion, the handle portion, lengthening rod portion and hooking portion are sequentially connected, the main part of the hooking portion is S shape, the end of the hooking portion can be placed into arc lifting lug.The utility model directly expands the arm action range of operator by setting lengthening rod portion, so that it can reach the backup roll box area that needs to climb ladder originally on ground or safety platform, by setting S-shaped hooking portion, the arc lifting lug of backup roll pin can be reliably hooked / catched, the design of S shape makes it can pull pin, and also can stably push pin, effectively transmit the force applied by operator on ground to pin.

Description

Technical Field

[0001] This utility model relates to the field of cold rolling mill support roll replacement technology, and in particular to a replacement device for rolling mill support rolls. Background Technology

[0002] As the first step in the cold rolling process, the pickling and rolling mill unit produces millions of tons annually to supply downstream finished product units. Therefore, stable production of the pickling and rolling mill unit relies heavily on regular equipment maintenance and periodic roll replacement. Safe and convenient replacement of support rolls is particularly important. Currently, when replacing support rolls in the pickling and rolling mill unit, the distance between the lifting equipment and the support roll is too great, preventing production personnel from directly attaching the lifting equipment to the roll box. This necessitates climbing ladders for the operation, posing a safety hazard. Utility Model Content

[0003] To address the aforementioned technical problems, a replacement device for rolling mill support rolls is provided. The technical means employed in this invention are as follows: A replacement device for a rolling mill support roll includes a replacement assembly and a support roll pin that cooperates with the replacement assembly. The support roll pin includes a pin head, a wire rope connection part, and an arc-shaped lifting lug, which are connected in sequence. The replacement assembly includes a handle part, an extension rod part, and a hook part, which are connected in sequence. The main body of the hook part is S-shaped, and the end of the hook part can be inserted into the arc-shaped lifting lug.

[0004] Furthermore, the length L of the extended rod satisfies: 2.5 meters ≤ L ≤ 3.6 meters.

[0005] Furthermore, the front end of the hook part, i.e. the front end of the S-shape, is arc-shaped, and the diameter D of the arc satisfies: φ95mm≤D≤φ140mm.

[0006] Furthermore, both ends of the wire rope connection are planar structures, and the hook part is also provided with a bending part at the end of the extension rod part. One end of the bending part is connected to the extension rod part, and the other end is connected to the front end of the S-shaped hook part. The bending part includes a straight plate and a flat plate parallel to the extension rod part. The included angle between the straight plate and the flat plate, and between the straight plate and the extension rod part, is 90 degrees.

[0007] Furthermore, reinforcing ribs are installed in the bending section.

[0008] This invention has the following advantages: By incorporating an extended rod, it directly expands the operator's reach, allowing them to access the support roller box area—previously requiring a ladder—from the ground or a safe platform. The S-shaped hook reliably hooks / locks the arc-shaped lifting lug of the support roller pin. The S-shaped design enables both pulling and stable pushing of the pin, effectively transferring the force applied by the operator on the ground to the pin. Combined with a ring handle, it suspends the device, reducing operational risks. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the replacement component structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the support roller pin structure of this utility model.

[0012] In the diagram: 1. Handle; 2. Extension rod; 3. Hook; 4. Reinforcing rib; 5. Pin; 6. Wire rope connection; 7. Curved lifting lug. Detailed Implementation To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0013] This utility model discloses a replacement device for rolling mill support rolls, including as follows: Figure 1 The replacement components shown and as Figure 2 The support roller pin shown is used in conjunction with the replacement component. The support roller pin includes a pin head 5, a wire rope connection part 6, and an arc-shaped lifting lug 7. The pin head, wire rope connection part, and arc-shaped lifting lug are connected in sequence. The replacement component includes a handle part 1, an extension rod part 2, and a hook part 3. The handle part, extension rod part, and hook part are connected in sequence. The main body of the hook part is S-shaped, and the end of the hook part can be inserted into the arc-shaped lifting lug.

[0014] The ring-shaped handle is a welded closed ring, allowing for easy handholding by the operator. As an expandable implementation, it can be made by bending and welding round steel into a closed ring, or by forging it into a single piece. The handle surface is provided with knurling for easy gripping or covered with a non-slip rubber sleeve.

[0015] Furthermore, the length L of the extended rod satisfies: 2.5 meters ≤ L ≤ 3.6 meters.

[0016] Furthermore, the front end of the hook part, i.e. the front end of the S-shape, is arc-shaped, and the diameter D of the arc satisfies: φ95mm≤D≤φ140mm.

[0017] In one optional implementation, both ends of the wire rope connector are planar structures. The hook section also has a bend at the end of the extended rod. One end of the bend is connected to the extended rod, and the other end is connected to the front end of the S-shaped hook. The bend includes a straight plate and a flat plate parallel to the extended rod, with the included angles between the straight plate and the flat plate, and between the straight plate and the extended rod, both being 90 degrees. The bend can serve as a structure that directly contacts the arc-shaped lifting lug, which is particularly suitable for the support rolls of small-scale pickling and rolling mill units.

[0018] Furthermore, as an extended implementation method, for the support rolls of large-scale pickling and rolling mill units, where the pins are relatively large, reinforcing ribs 4 of a certain strength can be installed in the bending section to facilitate the pushing of heavier pins during installation.

[0019] As an optional implementation, the extended rod can be made using M10 threaded steel bars.

[0020] The method of using this utility model is as follows: Taking the disassembly of the support roller as an example, firstly, the overhead crane's hook is equipped with a lifting device and a wire rope. The ground operator holds the replacement component and hooks the wire rope using the S-shaped hook. This is then fitted onto the wire rope connection of the support roller pin. The operator on the ground holds the replacement component and adjusts its position and angle so that the opening of the S-shaped hook at the end of the device aligns with the arc-shaped lifting lug of the support roller pin. By pushing, pulling, or slightly swinging the long rod, the S-shaped hook is fitted or hooked onto the arc-shaped lifting lug of the pin. The specific curved shape of the S-shaped hook ensures that it can hold the arc-shaped lifting lug of the pin and is not prone to slippage.

[0021] The operator uses leverage by pushing, pulling, lifting, pressing, or slightly rotating a long rod on the ground to change the pitch angle of the pin. The support roller pin is then pulled out, lifted by an overhead crane, and placed in a designated area for the replacement of the support roller.

[0022] After the support roller is replaced, the above steps are reversed. The overhead crane lifts the support roller pin, and the ground staff, by holding the replacement component, cooperate with the crane staff to complete the initial positioning of the support roller pin to the roller box. Then, by pushing, pulling, lifting, pressing or slightly rotating the long rod on the ground, the support roller pin is aligned with the roller box. The long rod is then continuously and steadily pushed towards the roller box until the support roller pin enters the roller box.

[0023] Then remove the wire rope and move the S-hook out of the support roller pin.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A replacement device for rolling mill support rolls, characterized in that, The device includes a replacement component and a support roller pin that mates with the replacement component. The support roller pin includes a pin head, a wire rope connection part, and an arc-shaped lifting lug, which are connected in sequence. The replacement component includes a handle part, an extension rod part, and a hook part, which are connected in sequence. The main body of the hook part is S-shaped, and the end of the hook part can be inserted into the arc-shaped lifting lug.

2. The replacement device for rolling mill support rolls according to claim 1, characterized in that, The length L of the extended rod must satisfy the following condition: 2.5 meters ≤ L ≤ 3.6 meters.

3. The replacement device for rolling mill support rolls according to claim 1, characterized in that, The front end of the hook part, i.e. the front end of the S-shape, is arc-shaped, and the diameter D of the arc satisfies: φ95mm≤D≤φ140mm.

4. The replacement device for rolling mill support rolls according to claim 1, characterized in that, Both ends of the wire rope connection are planar structures. The hook part is also provided with a bending part at the end of the extension rod. One end of the bending part is connected to the extension rod, and the other end is connected to the front end of the S-shaped hook part. The bending part includes a straight plate and a flat plate parallel to the extension rod. The included angles between the straight plate and the flat plate, and between the straight plate and the extension rod are all 90 degrees.

5. The replacement device for rolling mill support rolls according to claim 1, characterized in that, Reinforcing ribs are installed in the bending section.

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