Maintenance platform for assisting hot rolling mill oil cylinder replacement

Abstract

The utility model discloses a maintenance platform for assisting hot rolling mill oil cylinder replacement, which comprises a platform main body, a fixed seat, a front support leg and a rear support leg, one end of the platform main body is connected with the front support leg, the other end of the platform main body is connected with the rear support leg, and the front support leg and the rear support leg are matched with a roller replacement guide rail to support the platform main body. The fixing base is installed at the front end of the front supporting leg and connected with the roller replacing trolley so that the roller replacing trolley can provide driving force to enable the maintenance platform to move, and the rear supporting leg is connected with the oil cylinder replacing device so that the oil cylinder replacing device can enter and exit from a rolling mill housing through the maintenance platform to achieve cylinder replacing operation. The device has the advantages of reasonable structure, high operation efficiency and the like.

Description

Technical Field

[0001] This utility model discloses a maintenance platform for assisting in the replacement of hydraulic cylinders in hot rolling mills, relating to a maintenance platform required for replacing lower-mounted HGC cylinders and bending roll cylinders in hot rolling mills in the metallurgical steel rolling field. Background Technology

[0002] In the metallurgical steel rolling industry, the bottom-mounted hot rolling mill HGC cylinder is installed at the bottom center of the inner frame of the mill stand, with locations on the drive side and operating side, used to adjust the rolling force and roll gap of the work rolls. The bending roll cylinder is installed in the middle of the inner frame of the stand, distributed on the inlet and outlet sides of the upper and lower work rolls, allowing for fine-tuning of the work roll position to even out wear and improve the surface quality of the strip. Due to the harsh working environment and the heavy load on the hydraulic cylinders, the HGC cylinder and bending roll cylinder need to be replaced periodically.

[0003] During periodic replacements, due to space limitations in and around the mill stand, specialized replacement devices are typically required to remove the HGC cylinders and bending roll cylinders from the mill stand separately. The cylinder replacement device needs a roll-changing trolley to enter and exit the mill stand, but due to limited movement, the trolley cannot directly push the cylinder replacement device to the mill drive side and remove it from the stand. Furthermore, before replacing the cylinders, workers must enter the mill stand to manually disassemble the cylinder fasteners and connect the cylinders to the transport device. However, since there is no maintenance platform inside the mill stand, this disassembly work is extremely inconvenient and poses safety hazards. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a maintenance platform for assisting in the replacement of hot rolling mill cylinders. It can provide workers with a safe and convenient maintenance space and assist in the replacement of hot rolling mill cylinders.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A maintenance platform for assisting in the replacement of hydraulic cylinders in a hot rolling mill includes a platform body, a fixed base, a front support leg, and a rear support leg. One end of the platform body is connected to the front support leg, and the other end of the platform body is connected to the rear support leg. The front and rear support legs cooperate with a roll changing guide rail to support the platform body. The fixed base is installed at the front end of the front support leg and is connected to a roll changing trolley so that the roll changing trolley provides driving force to move the maintenance platform. The rear support leg is connected to a hydraulic cylinder replacement device so that the hydraulic cylinder replacement device can enter and exit the mill stand through the maintenance platform to perform cylinder replacement operations.

[0007] Furthermore, the fixing seat is installed on the front support leg by screws or bolts. The top of the fixing seat is provided with a hole for lifting screws, and the front end of the fixing seat is provided with a Y-shaped groove with an annular groove inside, so as to be used with the mushroom head of the roller changing trolley.

[0008] Furthermore, the front support leg is welded to the front end of the platform body. The front support leg is connected to a U-shaped boss. The opening on the U-shaped boss matches the fixing seat and is secured by screws or bolts. Both the fixing seat and the front support leg have positioning holes for easy alignment and installation.

[0009] Furthermore, a pin hole is provided at the tail of the rear support leg. The connecting pin of the hydraulic cylinder replacement device is inserted into the pin hole, and then a safety pin is used to connect it, so that the hydraulic cylinder replacement device can be driven by the maintenance platform.

[0010] Furthermore, wear-resistant plates are provided at the bottom of the front and rear support legs, allowing them to slide on the roller changing guide rail.

[0011] Furthermore, the platform is divided into upper and lower layers. The upper layer is used to replace the bending roller cylinder, and the lower layer is used to replace the HGC cylinder.

[0012] Furthermore, a grating cover is laid on the platform, and the upper and lower platforms are connected by a steel ladder. The grating cover at the entrance of the steel ladder on the upper platform can be opened so that maintenance workers can descend from the upper platform to the lower platform via the steel ladder when needed.

[0013] This utility model discloses a maintenance platform for assisting in the replacement of hydraulic cylinders in hot rolling mills. It provides workers with a safe and convenient maintenance space and facilitates the replacement of hydraulic cylinders. Considering the different replacement devices for various cylinders, the platform is designed to be universal, with the pin holes of the rear support legs engaging with the connecting pins of the cylinder replacement device. During cylinder replacement within the hot rolling mill stand, the roll-changing trolley uses this utility model to drive the cylinder replacement device to the transmission side, thereby removing the HGC cylinder and bending roll cylinder from the mill stand to complete the cylinder replacement operation. Attached Figure Description

[0014] Figure 1 This is an assembly diagram of an embodiment of the present invention.

[0015] Figure 2 This is a perspective view of the fixing base of this utility model.

[0016] Figure 3 This is a side view of the fixing base of this utility model.

[0017] Figure 4 yes Figure 3 Sectional view along line A.

[0018] Figure 5 This is a front view of the front support leg of this utility model.

[0019] Figure 6 This is a top view of the front support leg.

[0020] Figure 7 yes Figure 6Sectional view along line B.

[0021] Figure 8 This is a view of the rear support leg of this utility model.

[0022] Figure 9 This is a top view of the rear support leg.

[0023] Figure 10 yes Figure 9 Sectional view along line C.

[0024] Numbering on the map:

[0025] 1. Fixed base; 2. Front support leg; 3. Platform; 4. Rear support leg; 5. Safety pin; 6. Wear-resistant plate. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] This utility model provides a maintenance platform required for replacing the lower-mounted HGC cylinder and bending roll cylinder of a hot rolling mill. The main purpose is to provide a universal maintenance platform that can provide workers with a safe and convenient maintenance space and assist in the replacement of hot rolling mill cylinders.

[0032] This utility model relates to a maintenance platform for assisting in the replacement of hydraulic cylinders in hot rolling mills. Please refer to [link / reference needed]. Figures 1 to 10 The platform includes a fixed base 1, a front support leg 2, a platform body 3, and a rear support leg 4. One end of the platform body 3 is connected to the front support leg 2, and the other end of the platform body 3 is connected to the rear support leg 4. The front and rear support legs cooperate with the roll changing guide rail to support the platform body 3. The fixed base 1 is installed at the front end of the front support leg 2 and is connected to the roll changing trolley so that the roll changing trolley provides driving force to move the maintenance platform. The rear support leg 4 is connected to the cylinder replacement device so that the cylinder replacement device can enter and exit the mill stand through the maintenance platform to perform cylinder replacement operations.

[0033] The implementation steps of this utility model are as follows:

[0034] 1. Use the workshop crane to lift the maintenance platform to the rolling mill operating side and place the front and rear support legs 2 and 4 on the roll changing guide rail;

[0035] 2. Start the roller changing trolley and connect it to the front fixed seat 1 of the maintenance platform;

[0036] 3. Use the workshop crane to lift the cylinder replacement device to the rolling mill operating side and place it next to the rear support leg 4 of the maintenance platform. Start the roll changing trolley again and push the maintenance platform so that the pin hole of the rear support leg 4 matches the connecting pin of the cylinder replacement device. Install the safety pin 5 to securely connect the maintenance platform and the cylinder replacement device.

[0037] 4. The maintenance worker climbs onto the platform, starts the roller changing trolley, and moves the cylinder replacement device to the maintenance position via the maintenance platform. Then the maintenance worker carries out the disassembly and hoisting work.

[0038] 5. After the hydraulic cylinder is disassembled and hoisted, and moved to the replacement position, the roller changing trolley is restarted to pull the hydraulic cylinder replacement device out of the archway via the maintenance platform.

[0039] VI. When installing a new hydraulic cylinder, the steps for using the maintenance platform should be performed in reverse order of the disassembly steps described above.

[0040] 7. After the hydraulic cylinder is replaced, the maintenance platform can be lifted off the work station by the workshop crane.

[0041] To enable the hydraulic cylinder disassembly and replacement device to achieve the above-described working process, the manufacturing and installation requirements for each component of this utility model are as follows:

[0042] I. For example Figure 1 As shown, the mounting base 1 is installed on the front support leg 2 using fasteners such as screws or bolts. For ease of installation, as... Figure 2 , Figure 3 , Figure 4 As shown, both the fixed base 1 and the front support leg 2 have positioning holes 11, with openings for lifting screws at the top and Y-shaped grooves 13 at the front end, and annular grooves 14 inside, to be used with the mushroom head of the roller changing trolley.

[0043] II. Figure 1 , Figure 5 , 6 and Figure 7 As shown, the front support leg 2 is welded to the front end of the platform body 3, and a U-shaped boss is welded to its front end. The threaded hole 22 and positioning hole 23 on the U-shaped boss cooperate with the fixed seat 1. A wear-resistant plate 6 is installed at the bottom of the front support leg 2 to allow it to slide smoothly on the guide rail.

[0044] III. Figure 1 As shown, the platform body 3 consists of two levels. The upper level is mainly used by maintenance workers to replace the bending roller cylinder, and the lower level is mainly used by maintenance workers to replace the HGC cylinder. A grating cover is laid on the platform body 3, and the upper and lower levels are connected by a steel ladder. The grating cover at the entrance of the steel ladder on the upper platform can be opened, allowing maintenance workers to descend from the upper platform to the lower platform when needed. Railings are installed around the platform body 3 to prevent maintenance workers from falling.

[0045] IV. Figure 8 , 9 As shown in Figure 10, the rear support leg 4 has a pin hole 41 at its tail. The connecting pin of the cylinder replacement device is inserted into the pin hole, and then connected using the safety pin 5. This allows the cylinder replacement device to be moved via the maintenance platform. As long as the connecting pin of the cylinder replacement device is always in contact with the pin hole, the cylinder replacement device can be moved in and out of the rolling mill stand via the maintenance platform. A wear-resistant plate 6 is provided at the point where the rear support leg 4 mates with the roll changing guide rail.

[0046] This utility model addresses the problems of the inability of the roll changing trolley to directly drive the cylinder changing device to the transmission side when changing cylinders inside the hot rolling mill stand, which makes it inconvenient for workers to move around inside the stand during maintenance and poses safety hazards, as well as the different changing devices. It designs a universal maintenance auxiliary platform with advantages such as reasonable structure, high work efficiency and strong versatility.

[0047] The above description is merely an embodiment of the invention's technical content. Any modifications or variations made by those skilled in the art using this invention are within the scope of the invention's claims, and are not limited to those disclosed in the embodiments.

Claims

1. A maintenance platform for assisting in the replacement of hydraulic cylinders in hot rolling mills, characterized in that: The platform includes a main body, a fixed base, a front support leg, and a rear support leg. One end of the main body is connected to the front support leg, and the other end of the main body is connected to the rear support leg. The front and rear support legs cooperate with the roll changing guide rail to support the main body. The fixed base is installed at the front end of the front support leg and is connected to the roll changing trolley so that the roll changing trolley provides driving force to move the maintenance platform. The rear support leg is connected to the cylinder replacement device so that the cylinder replacement device can enter and exit the mill stand through the maintenance platform to perform cylinder replacement operations.

2. A maintenance platform for assisting in the replacement of hydraulic cylinders in a hot rolling mill, as described in claim 1, is characterized in that: The mounting base is installed on the front support leg by screws or bolts. The top of the mounting base has a hole for lifting screws, and the front end of the mounting base has a Y-shaped groove with an annular groove inside, to be used with the mushroom head of the roller changing trolley.

3. A maintenance platform for assisting in the replacement of hydraulic cylinders in a hot rolling mill, as described in claim 1, is characterized in that: The front support leg is welded to the front end of the platform body. The front support leg is connected to a U-shaped boss. The opening on the U-shaped boss matches the fixing seat and is secured by screws or bolts. Both the fixing seat and the front support leg have positioning holes for easy alignment and installation.

4. A maintenance platform for assisting in the replacement of hydraulic cylinders in a hot rolling mill, as described in claim 1, is characterized in that: The rear support leg has a pin hole at the end. Insert the connecting pin of the cylinder replacement device into the pin hole, and then connect it with a safety pin. The cylinder replacement device can then be driven by the maintenance platform.

5. A maintenance platform for assisting in the replacement of hydraulic cylinders in a hot rolling mill, as described in claim 1, characterized in that: The bottom of the front and rear support legs is equipped with wear-resistant plates, which allow them to slide on the roller changing guide rail.

6. A maintenance platform for assisting in the replacement of hydraulic cylinders in a hot rolling mill, as described in any one of claims 1 to 5, characterized in that: The platform is divided into two levels. The upper level is used to replace the bending roller cylinder, and the lower level is used to replace the HGC cylinder. The upper and lower platforms are surrounded by railings.

7. A maintenance platform for assisting in the replacement of hydraulic cylinders in a hot rolling mill, as described in claim 6, is characterized in that: The platform is covered with grating plates, and the upper and lower platforms are connected by steel ladders. The grating plate at the entrance of the steel ladder on the upper platform can be opened so that maintenance workers can go down from the upper platform to the lower platform via the steel ladder when needed.

Images