A device for dismounting a housing of a stand roll bearing of a rolling mill

Abstract

The utility model discloses a kind of dismounting devices of mill vertical roll bearing sleeve, including rack, hydraulic cylinder and press dismounting tool, the rack includes base and hanger located above the base, press dismounting tool is equipped on the base, the cylinder body of the hydraulic cylinder is fixedly installed on the hanger, the telescopic rod of the hydraulic cylinder is downward, the press dismounting tool includes pressing block and more than two clamping blocks, the pressing block is fixedly installed on the free end of the telescopic rod of the hydraulic cylinder, the clamping block is located at the step of the vertical roll end side of the bearing sleeve, the clamping block and the pressing block are detachably installed by bolt.The utility model utilizes the installation structure of the pressing block and the clamping block split body and detachable, so that the clamping block can be extended into the end side of the bearing sleeve, and then under the power of hydraulic cylinder, the bearing sleeve is pressed out from the vertical roll, avoid the waste of bearing sleeve when vertical roll scrap.

Description

Technical Field

[0001] This utility model relates to the field of disassembly and assembly tools, and in particular to a disassembly device for the outer sleeve of a rolling mill vertical roll bearing. Background Technology

[0002] In the field of structural steel production, the universal rolling mill is an extremely important piece of equipment, widely used for rolling various types of structural steel, such as H-beams, rails, I-beams, channel steel, sheet piles, U-beams, L-beams, and unequal angle steel. The universal rolling mill mainly consists of a pair of horizontal rolls and a pair of vertical rolls, with the vertical rolls being the key component for determining the flange dimensions of the rolled structural steel. The stability and precision of the vertical rolls directly determine the flange dimensional accuracy and quality of the rolled structural steel; therefore, the maintenance and replacement of the vertical rolls and their related components are crucial for ensuring production efficiency and product quality.

[0003] Each vertical roll requires the installation of two thrust bearings, one upper and one lower, during operation. These thrust bearings ensure the stability of the vertical roll under high-speed rotation and high-load conditions, preventing axial movement and thus guaranteeing the accuracy and continuity of the rolling process. Typically, the bearings have a longer service life than the vertical roll itself, especially under good lubrication and maintenance conditions. Even after the vertical roll has reached its end-of-life diameter, the internal thrust bearings can often continue to be used.

[0004] However, in actual production, the disassembly and replacement of thrust bearings face numerous technical challenges. For example... Figure 1 As shown, the outer sleeve 101 of the thrust bearing and the inner wall of the vertical roller 102 are fitted with an interference fit through heating. While this interference fit ensures a tight connection between the bearing and the vertical roller, it also greatly complicates subsequent disassembly. Furthermore, to axially limit the movement of the upper and lower thrust bearings, a step 103 extends inward from the middle of the inner wall of the vertical roller 102. The presence of the step 103 further restricts the use of traditional disassembly tools, making it impossible to press the outer sleeve 101 of the thrust bearing out of the vertical roller 102 using traditional jacks, hydraulic presses, or other pressure devices. Therefore, when the vertical roller reaches its scrap standard, the vertical roller and its internal thrust bearings are essentially scrapped simultaneously. This situation not only wastes resources but also results in significant economic losses. Utility Model Content

[0005] The purpose of this utility model is to provide a disassembly device for the outer sleeve of a rolling mill vertical roll bearing.

[0006] The technical solution to achieve the purpose of this utility model is: a disassembly device for the bearing outer sleeve of a rolling mill vertical roll, used to disassemble the bearing outer sleeve inside the vertical roll, wherein the hole wall of the vertical roll has a step extending radially inward, and the bearing outer sleeve is coaxially fixed to the hole wall of the vertical roll, wherein the inner diameter of the bearing outer sleeve is smaller than the diameter of the step;

[0007] The disassembly device for the bearing outer sleeve of the rolling mill vertical roll includes a frame, a hydraulic cylinder, and a pressure-relief fixture. The frame includes a base and a hanger located above the base. The base has a pressure-relief clearance groove. The width of the pressure-relief clearance groove is greater than the outer diameter of the bearing outer sleeve but less than the outer diameter of the vertical roll. The height of the pressure-relief clearance groove is greater than the height of the bearing outer sleeve. The hydraulic cylinder is vertically positioned, and its cylinder body is fixedly mounted on the hanger. The extension rod of the hydraulic cylinder points downwards. The pressure-relief fixture includes a pressure block and two or more clamping blocks. The pressure block is fixedly mounted on the free end of the extension rod of the hydraulic cylinder. The diameter of the pressure block is smaller than that of the bearing outer sleeve. The inner diameter is such that two or more of the clamping blocks are distributed circumferentially along the pressure block. The clamping blocks are located at the end of the bearing outer sleeve and at the step of the vertical roller. The distance from the outer edge of the clamping block to the axis of the hydraulic cylinder is D1, and the distance from the inner wall of the bearing outer sleeve near the step end to the axis of the hydraulic cylinder is D2. The relationship between D1 and D2 is D1>D2. The clamping blocks and the pressure block partially overlap. The pressure block has a through hole, and the clamping blocks have threaded holes. Each threaded hole is provided with a corresponding bolt. The bolt passes through the through hole and is threaded into the corresponding threaded hole. The clamping blocks and the pressure block are in contact and fastened together.

[0008] Furthermore, the pressure block is disc-shaped. The pressure block can be square or circular. Since the bearing outer sleeve is annular, a disc-shaped pressure block results in a more regular structure when placed inside the bearing outer sleeve, and also facilitates installation and fixation with the retaining block.

[0009] Furthermore, the clamping block is fan-shaped. Since both the vertical roller and the bearing outer sleeve are annular structures, when the clamping block is fan-shaped, the contact surface with the bearing outer sleeve is large, facilitating the application of force and pressure.

[0010] Furthermore, all the locking blocks are evenly distributed along the circumference of the pressure block. This arrangement allows for more even force distribution across the circumferential parts of the bearing outer sleeve.

[0011] Furthermore, the number of clamping blocks is three. The number of clamping blocks can be two, three, four or more. Compared to two, when force is applied with three clamping blocks, there are three force application points, forming a triangle, which prevents the pressure block from swaying and makes the pressing operation more stable; compared to four or more, the number of clamping blocks is less, and the installation and removal of the clamping blocks are also more convenient before and after removing the bearing outer sleeve from the vertical roller.

[0012] Furthermore, the number of threaded holes on the locking block is several, and these threaded holes are arranged along the width direction of the locking block. When locking the locking block and the pressure block by inserting different threaded holes, the relative installation position of the locking block and the pressure block can be adjusted, thereby adjusting the distance from the outer edge of the locking block to the axis of the hydraulic cylinder. This allows the pressure-removing fixture to adapt to the dimensions of bearing sleeves of different sizes, enabling the disassembly and assembly of the bearing sleeves.

[0013] Furthermore, the hanger includes an upright longitudinal beam and a horizontally arranged crossbeam, with the crossbeam fixedly installed on the upper part of the longitudinal beam.

[0014] Furthermore, a U-shaped opening is provided at the upper part of the longitudinal beam, and the end of the crossbeam is located within the U-shaped opening. A limiting hole is horizontally provided on each side of the longitudinal beam on both sides of the U-shaped opening. The two limiting holes are coaxial, and a limiting rod is inserted into both limiting holes, positioned above the end of the crossbeam. The limiting rod is close to the crossbeam. The crossbeam and the longitudinal beam can be directly welded together, bolted together, or fixed using the aforementioned limiting rod. Compared to other methods, by providing the U-shaped opening at the upper part of the longitudinal beam, and inserting the end of the crossbeam into the U-shaped opening through the upper opening, and then fixing the end of the crossbeam using the limiting rod, the crossbeam is not only easy to install but also allows for flexible disassembly and assembly, particularly facilitating the inspection and maintenance of hydraulic cylinders, etc.

[0015] Furthermore, a baffle is provided on the outer side of the U-shaped opening. The baffle limits the two ends of the crossbeam, preventing horizontal movement of the crossbeam and making the installation structure of the crossbeam more stable and reliable.

[0016] Furthermore, a support plate is inclinedly provided at the bottom of the longitudinal beam. The bottom of the support plate is fixed to the base, and the top of the support plate is fixed to the side wall of the longitudinal beam. The support plate reinforces the longitudinal beam, making its vertical structure more robust and stable.

[0017] Furthermore, the crossbeam is made of H-shaped steel, and several reinforcing plates are provided in the middle of the crossbeam. When the hydraulic cylinder presses downward to disassemble the bearing sleeve, the crossbeam is subjected to a large force. To facilitate material sourcing while also increasing the structural strength of the crossbeam, preferably, the crossbeam is made of H-shaped steel, and several reinforcing plates are provided in the middle of the crossbeam.

[0018] This utility model relates to a disassembly device for the bearing outer sleeve of a rolling mill vertical roll. Through the configuration of a base with the pressure relief groove and a hydraulic cylinder, the bearing outer sleeve on the vertical roll is placed on the base, and under the power of the hydraulic cylinder, the bearing outer sleeve is pressed out of the vertical roll. Furthermore, the device incorporates a pressure relief fixture, which includes a pressure block and a locking block. The pressure block is fixed to the telescopic rod of the hydraulic cylinder, and the locking block is inserted into the vertical roll at the step position. The edge of the locking block extends into the end side of the bearing outer sleeve, directly facing its end face. The locking block is detachably installed to the pressure block via bolts. Thus, by utilizing the separate pressure block and locking block and the detachable installation structure, the locking block can extend into the end side of the bearing outer sleeve, pressing it out from inside the vertical roll.

[0019] This utility model relates to a disassembly device for the bearing outer sleeve of a rolling mill vertical roll. It solves the problem that traditional pressure devices such as jacks and hydraulic presses cannot directly press the bearing outer sleeve out of the vertical roll from the outside, allowing the bearing outer sleeve to be removed from inside the roll and avoiding waste when the roll is scrapped. Furthermore, although the pressure block and the locking block are detachable structures, once the bolts are fixed, their installation is firm and reliable. There is no shaking between the pressure block and the locking block during pressing, making the operation more stable and reliable. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the assembly structure of the vertical roller and the outer sleeve of the thrust bearing;

[0021] Figure 2 This is a three-dimensional structural schematic diagram of the disassembly device for the outer sleeve of the vertical roll bearing of the rolling mill according to this utility model;

[0022] Figure 3 This is a front perspective view of the disassembly device for the outer sleeve of the vertical roll bearing of the rolling mill according to this utility model.

[0023] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure along line AA;

[0024] Figure 5 This is the first embodiment. Figure 3 Schematic diagram of the cross-sectional structure along line BB;

[0025] Figure 6 This is the second embodiment. Figure 3 A schematic diagram of the cross-sectional structure along line BB. Detailed Implementation

[0026] The preferred embodiment of the disassembly device for the rolling mill vertical roll bearing outer sleeve of this utility model will be described in detail below with reference to the accompanying drawings:

[0027] Figures 2 to 5 This invention discloses a first embodiment of a disassembly device for the bearing outer sleeve of a rolling mill vertical roll. In this first embodiment, the device is used to disassemble the bearing outer sleeve 10 inside the vertical roll 20. The vertical roll 20 has a step 201 extending radially inward from its bore wall. The bearing outer sleeve 10 is coaxially fitted onto the bore wall of the vertical roll 20. The inner diameter R11 of the bearing outer sleeve 10 is smaller than the diameter R21 of the step 201.

[0028] The disassembly device for the bearing outer sleeve of the rolling mill vertical roll includes a frame 1, a hydraulic cylinder 2, and a pressure relief fixture 3. The frame 1 includes a base 11 and a hanger 12 located above the base 11. The base 11 is provided with a pressure relief groove 111. The width R of the pressure relief groove 111 is greater than the outer diameter R12 of the bearing outer sleeve 10 and less than the outer diameter R22 of the vertical roll 20. The height H of the pressure relief groove 111 is greater than the height H1 of the bearing outer sleeve 20. The hydraulic cylinder 2 is vertically arranged, and the cylinder body of the hydraulic cylinder 2 is fixedly installed on the hanger 12. The telescopic rod 21 of the hydraulic cylinder 2 faces downward. The pressure relief fixture 3 includes a pressure block 31 and two or more clamping blocks 32. The pressure block 31 is fixedly installed on the free end of the telescopic rod 21 of the hydraulic cylinder 2. The diameter R3 of the pressure block 31 is smaller than that of the bearing outer sleeve. The inner diameter R11 of the bearing outer sleeve 10 is 10. Two or more of the clamping blocks 32 are distributed circumferentially along the pressure block 31. The clamping blocks 32 are located at the end of the bearing outer sleeve 10 and at the step 201 of the vertical roller 20. The distance from the outer edge of the clamping block 32 to the axis of the hydraulic cylinder 2 is D1. The distance from the inner wall of the bearing outer sleeve 10 near the step 201 to the axis of the hydraulic cylinder 2 is D2. The relationship between D1 and D2 is D1>D2. The clamping blocks 32 and the pressure block 31 partially overlap. The pressure block 31 has a through hole 311. The clamping blocks 32 have a threaded hole 321. Each threaded hole 321 is provided with a corresponding bolt 4. The bolt 4 passes through the through hole 311 and is threaded into the corresponding threaded hole 321. The clamping blocks 32 and the pressure block 31 are in contact and fastened.

[0029] This utility model relates to a disassembly device for the bearing outer sleeve of a rolling mill vertical roll, used to disassemble the bearing outer sleeve 10 inside the vertical roll 20. The bearing is installed inside the vertical roll 20, with the bearing outer sleeve 10 having an interference fit with the inner wall of the vertical roll 20. The key to disassembling the bearing inside the vertical roll 20 lies in how to remove the bearing outer sleeve 10 from inside the vertical roll 20. The structure of the vertical roll 20 and its inner bearing outer sleeve 10 is an existing structure, and therefore will not be elaborated upon further in this utility model.

[0030] This utility model relates to a disassembly device for the bearing outer sleeve of a rolling mill vertical roll. It mainly includes a frame 1, a hydraulic cylinder 2, and a pressing and unloading fixture 3. The frame 1 includes a base 11 and a hanger 12 located above the base 11. The base 11 has a disassembly position for placing the vertical roll 20. The base 11 also has a pressing and unloading clearance groove 111, which is used to allow space for the bearing outer sleeve 10 pressed out inside the vertical roll 20. The hanger 12 is used to install the hydraulic cylinder 2. The hydraulic cylinder 2 provides the operating power for the disassembly operation. It is connected to a hydraulic cylinder drive motor 23 via a hydraulic hose 22. The hydraulic cylinder drive motor 23 provides power to control the flow of hydraulic oil on the hydraulic hose 22, thereby controlling the extension and retraction of the telescopic rod 21 of the hydraulic cylinder 2. The structure and working principle of the hydraulic cylinder 2 are existing technologies, and will not be elaborated further in this utility model.

[0031] This utility model relates to a disassembly device for the outer casing of a vertical roll bearing in a rolling mill. The pressure disassembly fixture 3 includes a pressure block 31 and two or more clamping blocks 32. The diameter R3 of the pressure block 31 is smaller than the inner diameter R11 of the outer casing 10, and the pressure block 31 can extend into the outer casing 10. The clamping blocks 32 are located at the end of the outer casing 10 and at the step 201 of the vertical roll 20. The pressure block 31 has a through hole 311, and the clamping blocks 32 have a threaded hole 321. Bolts 4 are inserted into the through hole 311 and the threaded hole 321, and the bolts 4 are threaded into the threaded hole 321. The clamping blocks 32 and the pressure block 31 can be detached and installed by the bolts 4. The distance D1 from the outer edge of the clamping block 32 to the axis of the hydraulic cylinder 2 is greater than the distance D2 from the inner wall of the outer casing 10 to the axis of the hydraulic cylinder 2 at the same position. When the clamping block 32 moves axially, it can press against the end face of the outer casing 10. The detachable structure of the locking block 32 and the pressing block 31 is used to extend into the vertical roller 20 and face the end face of the bearing outer sleeve 10 so as to press the bearing outer sleeve 10.

[0032] The present invention relates to a disassembly device for the bearing outer sleeve of a rolling mill vertical roll. When disassembling the bearing outer sleeve 10 inside the vertical roll 20, the vertical roll 20, with the bearing outer sleeve 10 inside, is placed on the base 11. The vertical roll 20 is positioned upright on the base 11 with its end facing upwards, and the bearing outer sleeve 10 is located directly above the pressure relief groove 111. Then, each of the retaining blocks 32 is inserted into the vertical roll 20 at the position of the step 201, with the edge of the retaining block 32 extending into the end side of the bearing outer sleeve 10 and facing the end face of the bearing outer sleeve 10. Next, the pressure block 31 is moved to the retaining block 32, and the bolt 4 passes through the through hole 311 and threadedly engages with the threaded hole 321, allowing each retaining block 32 to be fixedly mounted on the pressure block 31 by the bolt 4. After all the locking blocks 32 are fixedly installed on the pressure block 31 by the bolts 4, the hydraulic cylinder 2 is activated, and the telescopic rod 21 of the hydraulic cylinder 2 extends, driving the pressure block 31 and the locking blocks 32 on it to move downward. The locking blocks 32 press against the bearing outer sleeve 10, pushing the bearing outer sleeve 10 out of the vertical roller 20, thus removing the bearing outer sleeve 10 from the vertical roller 20. After removing the bearing outer sleeve 10 from the vertical roller 20, the bolts 4 are loosened, and each locking block 32 is separated from the pressure block 31. Then, the hydraulic cylinder 2 is activated, and the telescopic rod 21 of the hydraulic cylinder 2 retracts, driving the pressure block 31 to move upward for reset. At the same time, the locking blocks 32 can be removed. When removing the other bearing outer sleeve 10 inside the vertical roller 20, the vertical roller 20 is turned upside down and placed on the base 11. The same disassembly process described above is repeated to remove it.

[0033] This utility model relates to a disassembly device for the outer sleeve of a vertical roll bearing in a rolling mill. The device moves the pressure block 31 to the locking block 32. When the bolt 4 passes through the through hole 311 and engages with the threaded hole 321, the pressure block 31 can be moved by the hydraulic cylinder 2. Alternatively, the pressure block 31 and the hydraulic cylinder 2 can be moved together by a gantry crane. To ensure the bolt 4 passes through the through hole 311 and the threaded hole 321, the locking block 32 can be positioned visually or by using a plumb bob passing through the through hole 311, thereby ensuring accurate alignment of the through hole 311 and the threaded hole 321.

[0034] In this utility model, the disassembly device for the bearing outer sleeve of a rolling mill vertical roll preferably has a disc-shaped pressure block 31. The pressure block 31 can be square or circular. Since the bearing outer sleeve 10 is annular, a disc-shaped pressure block 31 results in a more regular structure when placed inside the bearing outer sleeve 10, and also facilitates installation and fixation with the locking block 32.

[0035] In this utility model, the disassembly device for the bearing outer sleeve of a rolling mill vertical roll preferably has a fan-shaped locking block 32. Since both the vertical roll 20 and the bearing outer sleeve 10 are annular structures, when the locking block 32 is fan-shaped, the contact surface with the bearing outer sleeve 10 is large, facilitating the application of force and pressure.

[0036] In this utility model, the disassembly device for the outer sleeve of a vertical roll bearing in a rolling mill is preferably configured such that all the clamping blocks 32 are evenly distributed circumferentially along the pressure block 31. This arrangement allows for more even force distribution on all circumferential parts of the bearing outer sleeve 10.

[0037] The present invention relates to a disassembly device for the bearing outer sleeve of a rolling mill vertical roll. Preferably, the number of clamping blocks 32 is three. The number of clamping blocks 32 can be two, three, four, or more. Compared to two, when force is applied by three clamping blocks 32, the force application points are three, forming a triangle, preventing the pressure block 31 from swaying and making the pressing operation more stable. Compared to four or more, the number of clamping blocks 32 is less, and the installation and disassembly of the clamping blocks 32 are also more convenient before and after removing the bearing outer sleeve 10 from the vertical roll 20.

[0038] The present invention relates to a disassembly device for the outer sleeve of a vertical roll bearing of a rolling mill. Preferably, the hanger 12 includes an upright longitudinal beam 121 and a horizontally arranged crossbeam 122. The crossbeam 122 is fixedly installed on the upper part of the longitudinal beam 121, and the cylinder body of the hydraulic cylinder 2 is fixedly installed on the crossbeam 122.

[0039] The present invention relates to a disassembly device for the outer sleeve of a rolling mill vertical roll bearing. Preferably, the upper part of the longitudinal beam 121 has a U-shaped opening 1211, and the end of the crossbeam 122 is located within the U-shaped opening 1211. A limiting hole 1212 is horizontally opened on each side of the longitudinal beam 121 on both sides of the U-shaped opening 1211. The two limiting holes 1212 are coaxial, and a limiting rod 1213 is inserted into both limiting holes 1212. The limiting rod 1213 is located above the end of the crossbeam 122. The limiting rod 1213 is close to the crossbeam 122. The crossbeam 122 and the longitudinal beam 121 can be directly welded together, bolted together, or fixed by the limiting rod 1213. Compared to others, when the U-shaped opening 1211 is opened at the upper part of the longitudinal beam 121, and the end of the crossbeam 122 is inserted into the U-shaped opening 1211 through the opening above the U-shaped opening 1211, the end of the crossbeam 122 is limited and fixed by the limiting rod 1213. This makes the crossbeam 122 not only easy to install, but also flexible to disassemble and assemble, which is especially convenient for the inspection and maintenance of the hydraulic cylinder 2 and the like. In addition, with this configuration, when disassembling and assembling the pressure block 31 and the locking block 32, a gantry crane can be used to easily lift the crossbeam 122 and the hydraulic cylinder 2 and the pressure block 31 on it, so that the through hole 311 and the threaded hole 321 can be easily aligned during operation, allowing the bolt 4 to pass through the through hole 311 and the threaded hole 321 to install the pressure block 31 and the locking block 32; or after the bolt 4 is removed, a gantry crane can be used to lift the crossbeam 122 and the hydraulic cylinder 2 and the pressure block 31 on it away, so that the pressure block 31 and the locking block 32 are separated.

[0040] In this utility model, the disassembly device for the outer sleeve of the vertical roll bearing of a rolling mill preferably includes a baffle 1214 on the outer side of the U-shaped opening 1211. The baffle 1214 limits the two ends of the crossbeam 122, preventing the crossbeam 122 from moving horizontally, thus making the installation structure of the crossbeam 122 more stable and reliable.

[0041] In a preferred embodiment of the disassembly device for the outer sleeve of a vertical roll bearing in a rolling mill, a support plate 1215 is inclinedly provided at the bottom of the longitudinal beam 121. The bottom of the support plate 1215 is fixed to the base 11, and the top of the support plate 1215 is fixed to the side wall of the longitudinal beam 121. The provision of the support plate 1215 can reinforce the longitudinal beam 121, making the vertical structure of the longitudinal beam 121 more robust and stable.

[0042] The present invention relates to a disassembly device for the bearing outer sleeve of a rolling mill vertical roll. Preferably, the crossbeam 122 is made of H-shaped steel, and a plurality of reinforcing plates 1221 are provided in the middle of the crossbeam 122. When the hydraulic cylinder 2 presses downward to disassemble the bearing outer sleeve 10, the crossbeam 122 is subjected to a large force. To facilitate the use of materials, the crossbeam 122 can also have higher structural strength. Preferably, the crossbeam 122 is made of H-shaped steel, and a plurality of reinforcing plates 1221 are provided in the middle of the crossbeam 122.

[0043] Figures 2-4 , Figure 6 A second embodiment of the disassembly device for the outer casing of a vertical roll bearing of a rolling mill is disclosed. In this second embodiment, the number of threaded holes 321 on the locking block 32 is several, and the several threaded holes 321 are arranged along the width direction of the locking block 32. Other structures are the same as in Embodiment 1.

[0044] In the second embodiment of the disassembly device for the rolling mill vertical roll bearing outer sleeve of this utility model, when inserting different threaded holes 321 to lock the locking block 32 and the pressure block 31, the relative installation position of the locking block 32 and the pressure block 31 can be adjusted, thereby adjusting the distance D1 from the outer edge of the locking block 32 to the axis of the hydraulic cylinder 2, so that the pressure unloading fixture 3 can also adapt to the size of the bearing outer sleeve 10 of different sizes, and disassemble and install the bearing outer sleeve 10.

[0045] The present invention relates to a disassembly device for the bearing outer sleeve of a rolling mill vertical roll. By setting up a base 11 with the pressure relief groove 111 and a hydraulic cylinder 2, after the vertical roll 20 with the bearing outer sleeve 10 is placed on the base 11, the bearing outer sleeve 10 is pressed out of the vertical roll 20 under the power of the hydraulic cylinder 2. Based on this, and combined with the setting of the pressing and unloading fixture 3, the pressing and unloading fixture 3 includes the pressing block 31 and the clamping block 32. The pressing block 31 is fixed to the telescopic rod 21 of the hydraulic cylinder 2. The clamping block 32 is inserted into the vertical roller 20 at the position of the step 201. The edge of the clamping block 32 extends into the end side of the bearing outer sleeve 10 and is directly opposite the end face of the bearing outer sleeve 10. The clamping block 32 is detachably installed to the pressing block 31 by the bolt 4. In this way, by using the separate pressing block 31 and the clamping block 32 and the detachable installation structure, the clamping block 32 can extend into the end side of the bearing outer sleeve 10 and press the bearing outer sleeve 10 out from inside the vertical roller 20.

[0046] This utility model relates to a disassembly device for the bearing outer sleeve of a rolling mill vertical roll. It solves the problem that traditional pressure devices such as jacks and hydraulic presses cannot directly press the bearing outer sleeve 10 out of the vertical roll 20 from the outside. This allows the bearing outer sleeve 10 to be disassembled from inside the vertical roll 20, avoiding waste when the vertical roll is scrapped. Furthermore, although the pressure block 31 and the locking block 32 are detachable structures, after the bolts 4 are fixed, the installation of the pressure block 31 and the locking block 32 is firm and reliable. There is no shaking between the pressure block 31 and the locking block 32 during pressing, making the operation more stable and reliable.

[0047] For those skilled in the art to which this utility model pertains, several simple deductions or substitutions can be made without departing from the concept of this utility model, and all such deductions or substitutions should be considered to fall within the protection scope of this utility model.

Claims

1. A disassembly device for a bearing outer sleeve of a rolling mill vertical roll, used to disassemble the bearing outer sleeve inside the vertical roll, wherein the bore wall of the vertical roll has a step extending radially inward, the bearing outer sleeve is coaxially fitted onto the bore wall of the vertical roll, and the inner diameter of the bearing outer sleeve is smaller than the diameter of the step; characterized in that: The assembly includes a frame, a hydraulic cylinder, and a pressure-relieving fixture. The frame includes a base and a hanger located above the base. The base has a pressure-relieving groove, the width of which is greater than the outer diameter of the bearing outer sleeve and less than the outer diameter of the vertical roller. The height of the pressure-relieving groove is greater than the height of the bearing outer sleeve. The hydraulic cylinder is vertically arranged, and its cylinder body is fixedly mounted on the hanger. The extension rod of the hydraulic cylinder points downwards. The pressure-relieving fixture includes a pressure block and two or more clamping blocks. The pressure block is fixedly mounted on the free end of the extension rod of the hydraulic cylinder. The diameter of the pressure block is smaller than the inner diameter of the bearing outer sleeve. The locking blocks are distributed circumferentially along the pressure block. The locking blocks are located at the end of the bearing outer sleeve and at the step of the vertical roller. The distance from the outer edge of the locking block to the axis of the hydraulic cylinder is D1, and the distance from the inner wall of the bearing outer sleeve near the step end to the axis of the hydraulic cylinder is D2. The relationship between D1 and D2 is D1>D2. The locking blocks and the pressure block partially overlap. The pressure block has a through hole, and the locking blocks have threaded holes. Each threaded hole is provided with a corresponding bolt. The bolt passes through the through hole and is threaded into the corresponding threaded hole. The locking blocks and the pressure block are in contact and fastened together.

2. The disassembly device for the outer sleeve of the vertical roll bearing of a rolling mill according to claim 1, characterized in that: The pressing block is disc-shaped.

3. The disassembly device for the outer sleeve of the vertical roll bearing of a rolling mill according to claim 1, characterized in that: The card block is fan-shaped.

4. The disassembly device for the outer sleeve of the vertical roll bearing of a rolling mill according to claim 1, characterized in that: All the card blocks are evenly distributed along the circumference of the pressure block.

5. The disassembly device for the outer sleeve of the vertical roll bearing of a rolling mill according to claim 1, characterized in that: The number of card blocks is three.

6. The disassembly device for the outer sleeve of the vertical roll bearing of a rolling mill according to claim 1, characterized in that: The number of threaded holes on the card block is several, and the several threaded holes are arranged and distributed along the width direction of the card block.

7. The disassembly device for the outer sleeve of the vertical roll bearing of a rolling mill according to claim 1, characterized in that: The hanger includes an upright longitudinal beam and a horizontally arranged crossbeam, with the crossbeam fixedly installed on the upper part of the longitudinal beam.

8. The disassembly device for the outer sleeve of the vertical roll bearing of a rolling mill according to claim 7, characterized in that: The upper part of the longitudinal beam has a U-shaped opening, and the end of the crossbeam is located inside the U-shaped opening. A limiting hole is horizontally opened on each side of the longitudinal beam on both sides of the U-shaped opening. The two limiting holes are coaxial, and a limiting rod is inserted into both limiting holes. The limiting rod is located above the end of the crossbeam.

9. The disassembly device for the outer sleeve of the vertical roll bearing of a rolling mill according to claim 8, characterized in that: A baffle is provided on the outside of the U-shaped opening.

10. The disassembly device for the outer sleeve of the vertical roll bearing of a rolling mill according to claim 7, characterized in that: The bottom of the longitudinal beam is inclined with a support plate, the bottom of the support plate is fixed to the base, and the top of the support plate is fixed to the side wall of the longitudinal beam; the crossbeam is made of H-shaped steel, and the middle of the crossbeam is provided with several reinforcing plates.

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