Replacing device and construction method for fiber roller of strip steel production furnace

Abstract

The invention provides a strip steel production furnace fiber roller replacing device and a construction method, and the device comprises a fiber roller which comprises a main roller and an auxiliary roller assembled and matched with the main roller; wheels are arranged at the bottom of the moving trolley, and the moving trolley can move on the track; the fixed bracket is fixed on the moving trolley and is used for supporting a roller shaft neck of the main roller; the adjustable bracket is fixed on the moving trolley, is positioned on the inner side of the fixed bracket and is used for supporting the roller shaft neck of the auxiliary roller at the lowest position; and the adjustable bracket is used for jacking and lowering the roller shaft neck of the auxiliary roller and can drive the auxiliary roller and the main roller to move up and down together so as to adjust the height position of the fiber roller, so that the roller shaft neck of the main roller is placed on the fixed bracket. The device is simple in structure and convenient to operate, the replacement time can be greatly shortened, the construction safety risk in the high-temperature environment is reduced, and the strip steel yield is increased; the replacing device can be repeatedly used, the maintenance cost is reduced, and the replacing device is suitable for replacing fiber rollers of various specifications.

Description

Technical Field

[0001] This application belongs to the technical field of strip steel production equipment in the metallurgical industry, and in particular relates to a replacement device and construction method for fiber rollers in strip steel production furnaces, which is especially suitable for the rapid and safe replacement of fiber rollers or other similar workpieces in high-temperature environments. Background Technology

[0002] As a key component in the strip steel production line, the fiber roller in the mixing furnace area has excellent high temperature resistance. It can usually withstand temperatures above 1000℃ and has a low coefficient of expansion and small high-temperature deformation, which can effectively protect the surface quality of the strip steel and ensure production stability.

[0003] During production, fiber rollers require frequent replacement due to the need for rapid switching based on product specifications and material differences. Traditional replacement methods have numerous drawbacks. Typically, six workers are required to operate the machine, taking approximately four hours to complete a single replacement, resulting in a total working time of 24 hours – extremely low efficiency. Furthermore, the high-temperature environment of the mixing furnace area poses significant safety risks to workers, such as burns and equipment malfunctions, and prolonged downtime severely impacts production quality and output. In addition, traditional methods rely on manual handling and positioning, which is cumbersome and prone to damaging fiber rollers or bearing housings, increasing maintenance costs. These factors collectively restrict the overall efficiency and safety of the strip steel production line. Therefore, a more efficient and safer fiber roller replacement device and method are urgently needed to solve these problems. Summary of the Invention

[0004] This application provides a replacement device and construction method for fiber rollers in a strip steel production furnace, which solves the technical problems of low fiber roller replacement efficiency, high safety risks, and long downtime in the prior art.

[0005] To solve at least one of the above-mentioned technical problems, the technical solution adopted in this application is:

[0006] A fiber roller replacement device for a strip steel production furnace, comprising:

[0007] A fiber roller, comprising a main roller and an auxiliary roller assembled and fitted with the main roller;

[0008] A mobile cart equipped with wheels at its bottom, allowing it to move on tracks;

[0009] A fixed bracket, fixed on the mobile trolley, is used to support the roller journal of the main roller;

[0010] An adjustable bracket, fixed on the mobile trolley and located inside the fixed bracket, is used to support the roller journal of the auxiliary roller at its lowest position.

[0011] The adjustable bracket raises and lowers the journal of the auxiliary roller, which can drive the auxiliary roller and the main roller to move up and down together to adjust the height of the fiber roller so that the journal of the main roller is placed on the fixed bracket.

[0012] Furthermore, the body of the mobile trolley is constructed as a frame structure, welded from channel steel; several H-shaped steel frames are welded inside the body along its width; and support frames are welded intersecting between the H-shaped steel frames.

[0013] Furthermore, four wheels are provided at the bottom of the vehicle body; and two sets of symmetrically arranged lifting trunnions are provided on both sides of the width of the vehicle body; and the lifting trunnions are located between the wheels at both ends.

[0014] Furthermore, the fixed brackets are symmetrically arranged at both ends of the mobile trolley, and include two vertical frames welded to the mobile trolley and axle support frame for connecting the vertical frames; the axle support frame is arranged horizontally and is a certain distance away from the top of the vertical frame.

[0015] Furthermore, the top of the vertical frame forms a groove with the bearing support frame to prevent the journal of the main roller from slipping off; and a boss is also provided on the top surface of the bearing support frame, the boss being located on the side of the bearing support frame away from the adjustable bracket and being arranged along its length.

[0016] Furthermore, the adjustable bracket is symmetrically arranged on the mobile trolley, and includes a balance cylinder and a hydraulic cylinder arranged in the same row, as well as a bearing seat for supporting the roller journal of the auxiliary roller. The hydraulic cylinder is located on the central axis of the mobile trolley, and the balance cylinder is placed on both sides of the hydraulic cylinder; the bearing seat is fixed on the connecting frame on the hydraulic cylinder.

[0017] Furthermore, the lower surfaces of the balance cylinder and the hydraulic cylinder are fixed on the same mounting bracket, and their piston rods are uniformly connected to the connecting bracket, and the shaft pillow seat is fixed on the connecting bracket.

[0018] Furthermore, the bearing seat is constructed as a V-shaped groove structure, with the bottom surface of the groove being a plane and its angle ranging from 30 to 75°.

[0019] Furthermore, a water tank is provided at one end of the mobile trolley, which is fixed to the outside of the fixed bracket for storing cooling water.

[0020] A method for replacing fiber rollers in a strip steel production furnace using the replacement device described above includes the following steps:

[0021] S1. The assembled replacement device is pushed into the underside of the strip steel production furnace along the laid trolley track by the wheels on the mobile trolley, so that the replacement device moves directly under the old fiber roller to be replaced.

[0022] S2. Operate the adjustable bracket to raise the bearing seat on it that supports the journal of the auxiliary roller until it is in close contact with and against the journal of the auxiliary roller located at the bottom.

[0023] S3. Remove the bearing seat bolts at both ends of the main roller journal and remove the upper cover of the bearing seat;

[0024] S4. Operate the hydraulic cylinder in the adjustable bracket to slowly lower it and drive the old fiber roller to fall smoothly until the main roller's journal is completely placed on the bearing bracket on the fixed bracket; wherein, the hydraulic cylinder is raised and lowered by an external manual pressure pump, and the balance cylinders on both sides of the hydraulic cylinder are raised and lowered synchronously to maintain stable support for the auxiliary roller's journal.

[0025] S5. The replacement device carrying the old fiber roller is pushed out along the trolley track to the crane working area, and the old fiber roller is directly lifted away by the crane.

[0026] S6. Then hoist the new fiber roller onto the shaft pillow frame;

[0027] S7. Push the replacement device carrying the new fiber roller back into the working position under the strip steel production furnace; operate the hydraulic cylinder in the adjustable bracket to lift the new fiber roller to the installation height through the bearing seat, then reinstall the bearing seat on the main roller journal of the new fiber roller, install the cover and tighten the bolts to complete the installation;

[0028] S8. Remove the replacement device and clean up the site.

[0029] This application presents a fiber roller replacement device and construction method for a strip steel production furnace. The device is simple in structure, easy to operate, and can significantly shorten replacement time and reduce construction safety risks in high-temperature environments. Through a dedicated device and standardized construction process, the fiber roller replacement time is reduced from 4 hours to 1 hour, and the working hours are reduced from 24 hours to 4 hours, greatly improving efficiency. Simultaneously, it can accumulate more than 3 hours of additional production time per day, increasing strip steel output. The replacement device is reusable, reducing maintenance costs, and is suitable for replacing fiber rollers of various specifications. Attached Figure Description

[0030] Figure 1 This is a perspective view of the fiber roller replacement device in this application;

[0031] Figure 2 This is a perspective view of the replacement device in this application;

[0032] Figure 3 This is a top view of the replacement device in this application;

[0033] Figure 4 This is a front view of the replacement device in this application.

[0034] In the picture:

[0035] 10. Fiber roller; 11. Main roller; 12. Auxiliary roller

[0036] 13. Connecting rod; 14. Bearing housing; 20. Moving trolley

[0037] 21. Wheel; 22. Lifting trunnion; 30. Fixing bracket

[0038] 31. Vertical bracket; 32. Shaft pillow bracket; 33. Boss

[0039] 40. Adjustable bracket; 41. Hydraulic cylinder; 42. Balance cylinder

[0040] 43. Connecting bracket; 44. Shaft pillow seat; 50. Water tank

[0041] 60. Track Detailed Implementation

[0042] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0043] This embodiment proposes a replacement device for fiber rollers in a strip steel production furnace, such as... Figure 1 As shown, the device for replacing the fiber roller 10 includes a movable trolley 20 that can move on a track 60, and a fixed bracket 30, an adjustable bracket 40, and a water tank 50 fixedly mounted on the movable trolley. The fiber roller 10 includes a main roller 11 and an auxiliary roller 12 assembled with the main roller 11. The fixed bracket 30 has a bearing support 32 for supporting the roller journal of the main roller 11, and the adjustable bracket 40 has a bearing seat 44 for supporting the roller journal of the auxiliary roller 12 at its lowest position and a hydraulic cylinder 41. The adjustable bracket 40 raises and lowers the roller journal of the auxiliary roller 12, which can drive the auxiliary roller 12 and the main roller 11 to move up and down together to adjust the height position of the fiber roller 10, so that the roller journal of the main roller 11 is placed on the bearing support 32 of the fixed bracket 30. Since the auxiliary roller 12 is rigidly connected to the main roller 11 through a connecting rod 13, raising the roller journal of the auxiliary roller 12 can drive the entire fiber roller 10 assembly to move synchronously.

[0044] The fiber roller 10 is a ceramic fiber roller or a refractory fiber roller, mainly used in the furnace section of continuous heat treatment furnaces, such as annealing furnaces, quenching furnaces, and sintering furnaces. The fiber roller 10 is installed in the furnace section of the production line as a furnace roller, directly carrying and conveying the high-temperature strip steel, allowing it to pass through the furnace at a uniform speed to complete heat treatment processes such as heating, heat preservation, and cooling. In this embodiment, each main roller 11 has a connecting rod 13 at its end, which mates with its axis. The two ends of the connecting rod 13 are fixedly connected to the ends of two auxiliary rollers 12, respectively. At the outer end of the main roller 11, i.e., outside the connecting rod 13, a bearing seat 14 is also provided, connected to the roller shaft of the main roller 11. The bearing seat 14 is fixed to the roller shaft of the main roller 11 by a nut.

[0045] like Figure 2-3 The mobile trolley 20 has a frame structure constructed from welded channel steel. Several H-shaped steel frames are welded along its width inside the trolley, with support frames welded across them; the structure is stable and has a strong load-bearing capacity. Four wheels 21 are located at the bottom of the mobile trolley 20, allowing it to move on a pre-set horizontal track 60, facilitating the pushing of the replacement device under the strip steel production furnace or outwards to the overhead crane working area. Two sets of symmetrically arranged lifting trunnions 22 are located on both sides of the trolley's width, between the wheels 21 at both ends, facilitating lifting and transportation and improving the device's mobility and applicability.

[0046] The water tank 50, used to store cooling water, is fixed on the mobile trolley 20 and located at one end of the trolley 20. Fixed brackets 30 and adjustable brackets 40 are symmetrically arranged along the length of the mobile trolley 20, with one end of the fixed bracket 30 positioned close to the water tank 50, and the adjustable bracket located inside the fixed bracket 30. The water tank 50 is primarily used to store cooling water, providing cooling and emergency response in high-temperature working environments, thus improving construction safety.

[0047] Along the length of the moving trolley, the distance between the two fixed supports 30 is greater than the distance between the two adjustable supports 40. This is mainly because the fixed supports 30 are used to support the journal of the main roller 11, and the adjustable supports 40 are used to support the journal of the auxiliary roller 12. The length of the journal of the main roller 11 is greater than the length of the journal of the auxiliary roller 12.

[0048] like Figure 2-4As shown, fixed supports 30 are symmetrically arranged at both ends of the moving trolley 20 to support the journals of the main roller 11. The fixed supports 30 include two vertical frames 31 welded to the body of the moving trolley 20 and a bearing support 32 for connecting the upper section of the vertical frames 31. The bearing support 32 is horizontally arranged. It is positioned a certain distance from the top of the vertical frames 31 to allow the tops of the two vertical frames 31 to form a groove with the bearing support 32, preventing the journals of the main roller 11 from slipping out of the groove and improving the stability and safety of the main roller 11 support. A boss 33 is also provided on the top surface of the bearing support 32. The boss 33 is arranged along the length of the bearing support 32 and is located on the side of the bearing support 32 away from the adjustable support 40. This is to increase the friction of the bearing support 32 supporting the journals of the main roller 11, thereby increasing the supporting force on the main roller 11.

[0049] The adjustable support 40 includes two balance cylinders 42 and a hydraulic cylinder 41 arranged in the same row, as well as a bearing seat 44 for supporting the roller journal of the auxiliary roller 12. The hydraulic cylinder 41 is located on the central axis of the moving trolley 20, and the balance cylinders 42 are placed on both sides of the hydraulic cylinder 41. The lower surfaces of the balance cylinders 42 and the hydraulic cylinders 41 are fixed on the same mounting bracket, and their piston rods are uniformly connected to the connecting bracket 43. The bearing seat 44 is fixed on the connecting bracket 43 and the hydraulic cylinder 41. Through the coordinated work of the hydraulic cylinder 41 and the balance cylinder 42, the auxiliary roller 12 and the main roller 11 can be raised and lowered synchronously and smoothly.

[0050] The hydraulic cylinder 41 has an oil inlet and an oil outlet on its cylinder body. When not in use, the oil pipe is removed and the two oil ports are sealed with nuts. When needed, the nuts are removed and the cylinder is directly connected to an external pressure pump via an oil pipe. Each of the two hydraulic cylinders 41 is connected to an external pressure pump. The pressure pump is a common structure in this field, and the attached diagram is omitted. The external pressure pumps are manually controlled simultaneously on both sides, thereby controlling the lifting and lowering movement of the hydraulic cylinder 41. The hydraulic cylinder 41 drives the shaft support 44 to rise and fall with the hydraulic cylinder 41 via the connecting frame 43. At the same time, the balance cylinders 42 on both sides of the hydraulic cylinder 41 rise and fall synchronously to maintain stable support for the journal of the auxiliary roller 12.

[0051] Preferably, the bearing seat 44 is constructed as a V-shaped groove structure, with a flat bottom surface and an angle range of 30-75°, which facilitates the placement and stable support of the roller journal of the auxiliary roller 12, enables precise adjustment of the height of the fiber roller 10, and facilitates installation and disassembly.

[0052] A method for replacing fiber rollers in a strip steel production furnace using the replacement device described above includes the following steps:

[0053] S1. The assembled replacement device is pushed under the strip steel production furnace by the wheels 21 on the mobile trolley 20 along the laid trolley track 60, so that the replacement device moves directly under the old fiber roller 10 to be replaced.

[0054] S2. Operate the adjustable bracket 40 to raise the bearing seat 44 that supports the journal of the auxiliary roller 12 until it is in close contact with and presses against the journal of the lowest auxiliary roller 12. Since the auxiliary roller 12 is rigidly connected to the main roller 11 through the connecting rod 13, raising the journal of the auxiliary roller 12 can drive the entire fiber roller 10 assembly to move synchronously.

[0055] S3. Remove the bolts on the bearing seats 14 at both ends of the journal of the main roller 11, and remove the cover or nut of the bearing seat 14 to separate the journal of the main roller 11 from the bearing seat 14.

[0056] S4. Operate the hydraulic cylinder 41 in the adjustable bracket 40 to slowly lower it and drive the old fiber roller 10 to fall smoothly until the roller journal of the main roller 11 falls completely on the shaft pillow frame 32 on the fixed bracket 30.

[0057] S5. The replacement device carrying the old fiber roller 10 is pushed out along the trolley track 60 to the crane working area, and the old fiber roller 10 is directly lifted away by the crane.

[0058] S6. Then hoist the new fiber roller 10 onto the shaft pillow frame 32.

[0059] S7. Push the replacement device carrying the new fiber roller 10 back into the working position under the strip steel production furnace, operate the hydraulic cylinder 41 in the adjustable bracket 40 to lift the new fiber roller 10 to the installation height through the bearing seat 44, then reinstall the bearing seat 14 on the journal of the main roller 11 in the new fiber roller 10, install the cover and tighten the bolts to complete the installation.

[0060] S8. Remove the replacement unit and clean up the site.

[0061] This application presents a fiber roller replacement device and construction method for a strip steel production furnace. The device is simple in structure, easy to operate, and can significantly shorten replacement time and reduce construction safety risks in high-temperature environments. Through a dedicated device and standardized construction process, the fiber roller replacement time is reduced from 4 hours to 1 hour, and the working hours are reduced from 24 hours to 4 hours, greatly improving efficiency. Simultaneously, it can accumulate more than 3 hours of additional production time per day, increasing strip steel output. The replacement device is reusable, reducing maintenance costs, and is suitable for replacing fiber rollers of various specifications.

[0062] The embodiments of this application have been described in detail above. These descriptions are merely preferred embodiments and should not be construed as limiting the scope of this application. All equivalent variations and modifications made within the scope of this application should still fall within the patent coverage of this application.

Claims

1. A replacement device for fiber rollers in a strip steel production furnace, characterized in that, include: A fiber roller, comprising a main roller and an auxiliary roller assembled and fitted with the main roller; A mobile cart equipped with wheels at its bottom, allowing it to move on tracks; A fixed bracket, fixed on the mobile trolley, is used to support the roller journal of the main roller; An adjustable bracket, fixed on the mobile trolley and located inside the fixed bracket, is used to support the roller journal of the auxiliary roller at its lowest position. The adjustable bracket raises and lowers the journal of the auxiliary roller, which can drive the auxiliary roller and the main roller to move up and down together to adjust the height of the fiber roller so that the journal of the main roller is placed on the fixed bracket.

2. The fiber roller replacement device for a strip steel production furnace according to claim 1, characterized in that, The mobile trolley has a frame structure made of welded channel steel; several H-shaped steel frames are welded inside the trolley along its width; and support frames are welded across the H-shaped steel frames.

3. The fiber roller replacement device for a strip steel production furnace according to claim 2, characterized in that, Four wheels are provided at the bottom of the vehicle body; and two sets of symmetrically arranged lifting trunnions are provided on both sides of the width of the vehicle body; and the lifting trunnions are located between the wheels at both ends.

4. A fiber roller replacement device for a strip steel production furnace according to any one of claims 1-3, characterized in that, The fixed brackets are symmetrically arranged at both ends of the mobile trolley, and include two vertical frames welded to the mobile trolley and axle support frame for connecting the vertical frames; the axle support frame is arranged horizontally and is a certain distance away from the top of the vertical frames.

5. The fiber roller replacement device for a strip steel production furnace according to claim 4, characterized in that, The top of the vertical frame forms a groove with the bearing support frame to prevent the journal of the main roller from slipping off; and a boss is also provided on the top surface of the bearing support frame, the boss being located on the side of the bearing support frame away from the adjustable bracket and being arranged along its length.

6. A fiber roller replacement device for a strip steel production furnace according to any one of claims 1-3 and 5, characterized in that, The adjustable bracket is symmetrically arranged on the mobile trolley. It includes a balance cylinder and a hydraulic cylinder arranged in the same row, as well as a bearing seat for supporting the roller journal of the auxiliary roller. The hydraulic cylinder is located on the central axis of the mobile trolley, and the balance cylinder is placed on both sides of the hydraulic cylinder. The bearing seat is fixed on the connecting bracket of the hydraulic cylinder.

7. The fiber roller replacement device for a strip steel production furnace according to claim 6, characterized in that, The lower surfaces of the balance cylinder and the hydraulic cylinder are fixed on the same mounting bracket, and their piston rods are uniformly connected to the connecting bracket. The shaft pillow seat is fixed on the connecting bracket.

8. The fiber roller replacement device for a strip steel production furnace according to claim 6, characterized in that, The bearing seat is constructed as a V-shaped groove structure, with the bottom surface of the groove being a plane and its angle ranging from 30 to 75°.

9. A fiber roller replacement device for a strip steel production furnace according to any one of claims 1-3, 5, and 7-8, characterized in that, A water tank is also provided at one end of the mobile trolley, which is fixed to the outside of the fixed bracket and is used to store cooling water.

10. A method for replacing fiber rollers in a strip steel production furnace using the replacement device as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. The assembled replacement device is pushed into the underside of the strip steel production furnace along the laid trolley track by the wheels on the mobile trolley, so that the replacement device moves directly under the old fiber roller to be replaced. S2. Operate the adjustable bracket to raise the bearing seat on it that supports the journal of the auxiliary roller until it is in close contact with and against the journal of the auxiliary roller located at the bottom. S3. Remove the bearing seat bolts at both ends of the main roller journal and remove the upper cover of the bearing seat; S4. Operate the hydraulic cylinder in the adjustable bracket to slowly lower it and drive the old fiber roller to fall smoothly until the main roller's journal is completely placed on the bearing bracket on the fixed bracket; wherein, the hydraulic cylinder is raised and lowered by an external manual pressure pump, and the balance cylinders on both sides of the hydraulic cylinder are raised and lowered synchronously to maintain stable support for the auxiliary roller's journal. S5. The replacement device carrying the old fiber roller is pushed out along the trolley track to the crane working area, and the old fiber roller is directly lifted away by the crane. S6. Then hoist the new fiber roller onto the shaft pillow frame; S7. Push the replacement device carrying the new fiber roller back into the working position under the strip steel production furnace; operate the hydraulic cylinder in the adjustable bracket to lift the new fiber roller to the installation height through the bearing seat, then reinstall the bearing seat on the main roller journal of the new fiber roller, install the cover and tighten the bolts to complete the installation; S8. Remove the replacement device and clean up the site.

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