Grinding roller sleeve dismounting device

Abstract

The utility model provides a grinding roller sleeve dismounting device. Relates to the field of coal mill maintenance tools, and aims to solve the problem that when a grinding roller sleeve is disassembled at present, a jack needs to be additionally configured with a hydraulic source, so that the operation is complex, a connecting piece and a jacking bolt are installed on a fixed disc, the connecting piece establishes connection between the fixed disc and the grinding roller sleeve, and the jacking bolt is matched with a threaded hole in the fixed disc; the jacking bolt abuts against the grinding roller and gradually pushes the grinding roller to move in the axial direction, so that the grinding roller and the grinding roller sleeve are gradually separated in the axial direction, use of large equipment such as a jack is avoided, the operation difficulty is reduced, and the use convenience is improved.

Description

Technical Field

[0001] The utility model relates to the field of maintenance tools for coal mills, and particularly to a roll sleeve disassembly device. Background Technique

[0002] When performing maintenance operations on the grinding rolls of a coal mill, it is necessary to remove the roll sleeves from the grinding rolls. During disassembly, a T-shaped tool and a screw jack are used, and a sledgehammer is used to strike. A crane is used to assist in disassembling the roll sleeve pressing block. An oil jack is installed between the disassembly platform and the roll sleeve, and the oil jack station is started to pressurize to a certain value (such as 120 MPa) to remove the roll sleeve from the grinding roll. The hoisting and disassembly of the roll sleeve require high experience of the operators. The traditional disassembly method is likely to damage the equipment, resulting in an increase in workload and labor input, low work efficiency, and inability to guarantee the maintenance time.

[0003] Chinese Patent (Publication No. CN 115302435 A) discloses a disassembly and assembly tool kit for large bearings inside a roll assembly, including a vertical jack, a long screw, double nuts, and an installation and disassembly cover plate. The installation and disassembly cover plate is of an annular structure, and a number of first through holes for cooperating with the long screw are evenly distributed on the annular installation and disassembly cover plate. The diameter of the through hole is larger than the diameter of the long screw. The installation and disassembly cover plate is sleeved outside the roll shaft, and each long screw correspondingly passes through the first through hole on the installation and disassembly cover plate, and double nuts are screwed on each long screw for fastening. The top surface of the jack contacts the lower surface of the installation and disassembly cover plate. Multiple people synchronously operate the jack, and the depth of the bearing being pushed downward is monitored from the vertical plane direction of the axis where the jack is located, so that the bearing, together with the roll shaft, large spacer sleeve, and small spacer sleeve outer circle, is separated from the roll core. During its operation process, it is still necessary for multiple people to synchronously operate the jack, and it is necessary to additionally configure a hydraulic source and precisely control the action of the jack, with relatively high requirements for operation accuracy. The required hydraulic source for the action also makes the disassembly tool complex. Content of the Utility Model

[0004] The purpose of the utility model is to address the defects existing in the prior art and provide a roll sleeve disassembly device. A connecting piece and a jacking bolt are installed on a fixed disk. The connecting piece establishes the connection between the fixed disk and the roll sleeve. The jacking bolt cooperates with the threaded hole on the fixed disk. When the jacking bolt is screwed, the jacking bolt abuts against the grinding roll and gradually pushes the grinding roll to move axially, so that the grinding roll and the roll sleeve are gradually separated axially, avoiding the use of large equipment such as jacks, reducing the operation difficulty, and improving its use convenience.

[0005] To achieve the above purpose, the following technical solutions are adopted:

[0006] A roller sleeve disassembly device includes a fixed disk. Multiple connection holes and multiple jacking holes are provided on the fixed disk. The jacking holes are threaded through holes and are threadedly fitted with jacking bolts. One end of the jacking bolt is a head end, and the other end is an abutting end that abuts against the roller. The connection holes are fitted with connectors for connecting the roller sleeve. A cushion block is provided on the bottom end surface of the fixed disk. The cushion block protrudes from the bottom end surface of the fixed disk and abuts against the roller sleeve, so as to form a gap between the bottom end surface of the fixed disk and the roller sleeve.

[0007] Further, the connection holes are divided into at least three groups, with at least one connection hole in each group, and all groups of connection holes are evenly distributed circumferentially along the axis of the fixed disk.

[0008] Further, the connection holes in the same group include two connection holes. The connection holes in the same group are spaced apart radially along the fixed disk. The connection holes are through holes, and at least one connection hole in the same group of connection holes is fitted with a connector.

[0009] Further, multiple cushion blocks are provided, and all cushion blocks are evenly distributed circumferentially along the axis of the fixed disk. The positions where the cushion blocks abut against the roller sleeve are coplanar.

[0010] Further, the cushion blocks are arranged corresponding to the connection holes. Each group of connection holes corresponds to one cushion block, and the connector passes through the connection hole and the cushion block in sequence and then is connected to the roller sleeve.

[0011] Further, the multiple jacking holes are evenly distributed circumferentially along the axis of the fixed disk, and each jacking hole is respectively fitted with a jacking bolt.

[0012] Further, the jacking bolt penetrates through the fixed disk, and the head end of the jacking bolt is used to receive external driving.

[0013] Further, the connection holes are through holes, the connectors are connection bolts, and the end of the connection bolt abuts against the fixed disk.

[0014] Further, a lifting lug is installed on the fixed disk, and a lifting hole is provided on the lifting lug to cooperate with a lifting tool.

[0015] Further, the lifting lug is installed at the center of the fixed disk, and the lifting lug is located on the top end surface of the fixed disk away from the cushion block.

[0016] Compared with the prior art, the advantages and positive effects of the present utility model are:

[0017] (1) In view of the problem that when removing the grinding roller sleeve currently, using a jack requires additional configuration of a hydraulic source, resulting in complex operations, a connecting piece and a jacking bolt are installed on the fixed disk. The connecting piece establishes the connection between the fixed disk and the grinding roller sleeve. The jacking bolt cooperates with the threaded hole on the fixed disk. When the jacking bolt is turned, the jacking bolt abuts against the grinding roller and gradually pushes the grinding roller to move axially, so that the grinding roller and the grinding roller sleeve are gradually separated axially, avoiding the use of large equipment such as jacks, reducing the operation difficulty, and improving its usability.

[0018] (2) A cushion block is arranged on the fixed disk. The cushion block can abut against the grinding roller sleeve, leaving a gap between the grinding roller sleeve and the fixed disk, so as to observe the contact state between the jacking bolt and the grinding roller through the gap, and improve the operation accuracy. Brief Description of the Drawings

[0019] The attached drawings forming a part of this utility model are used to provide a further understanding of this utility model. The schematic embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation to this utility model.

[0020] Figure 1 It is a schematic diagram of the device for removing the grinding roller sleeve in the embodiment of this utility model.

[0021] Figure 2 It is a schematic diagram of the fixed disk in the embodiment of this utility model.

[0022] Figure 3 It is a schematic diagram of the cushion block installed on the bottom end face of the fixed disk in the embodiment of this utility model.

[0023] In the figure, 1. lifting lug, 2. cushion block, 3. connecting piece, 4. jacking bolt, 5. fixed disk, 6. lifting hole, 7. connecting hole, 8. jacking hole. Detailed Embodiment

[0024] In a typical embodiment of this utility model, as Figures 1 - 3 shown, a device for removing the grinding roller sleeve is proposed.

[0025] Traditional disassembly and assembly tools need to use a jack. Using a jack requires additional configuration of a hydraulic source and precise control of the jack's action, with high requirements for operation accuracy. The required hydraulic source for the action also makes the disassembly and assembly tools complex. Based on this, this embodiment provides a device for removing the grinding roller sleeve. A connecting piece 3 and a jacking bolt 4 are installed on the fixed disk 5. The connecting piece 3 establishes the connection between the fixed disk 5 and the grinding roller sleeve. By using the action of the jacking bolt 4, the grinding roller and the grinding roller sleeve are gradually separated axially, avoiding the use of large equipment such as jacks, reducing the operation difficulty, and improving its usability.

[0026] As Figure 1As shown in the figure, the roll sleeve disassembly device mainly includes a fixed disk 5, a connecting member 3 and a jacking bolt 4. The fixed disk 5 is provided with a plurality of connecting holes 7 and a plurality of jacking holes 8. The jacking holes 8 are threaded through holes and are in threaded fit with the jacking bolts 4. One end of the jacking bolt 4 is a head end, and the other end is a contact end for contacting the roll. The connecting holes 7 are fitted with connecting members 3 for connecting the roll sleeve; a cushion block 2 is provided on the bottom end surface of the fixed disk 5. The cushion block 2 protrudes from the bottom end surface of the fixed disk 5 and abuts against the roll sleeve, so as to form a gap between the bottom end surface of the fixed disk 5 and the roll sleeve.

[0027] Specifically, in industrial production, especially in the maintenance of grinding equipment, the disassembly of the roll sleeve is a common and important task. Traditional disassembly methods often rely on large equipment such as jacks. These equipment are not only complex to operate, occupy a large space, but also easily cause additional damage or stress to the equipment itself. In addition, the use of large equipment also increases the safety risks of operation and reduces work efficiency. In this embodiment, by the synergistic effect of components such as the fixed disk 5, the connecting member 3, the jacking bolt 4 and the cushion block 2, the disassembly of the roll sleeve can be achieved through a simple rotation operation.

[0028] The fixed disk 5 serves as the basis of the entire disassembly device, is used for installing the connecting member 3 and the jacking bolt 4, and provides stable support. The connecting holes 7 provided on the fixed disk 5 are used for installing the connecting member 3 to establish a firm connection with the roll sleeve, ensuring that the roll sleeve can move together with the fixed disk 5 during the disassembly process; the jacking holes 8 provided on the fixed disk 5 are threaded through holes and are used for installing the jacking bolts 4.

[0029] One end of the jacking bolt 4 is a head end, which is convenient for cooperating with tools such as wrenches and sockets to be screwed. The other end is a contact end for contacting the roll to apply a driving force to the roll. By rotating the jacking bolt 4, it contacts and pushes the roll to move axially, thereby realizing the separation of the roll and the roll sleeve. The jacking bolt 4 is installed in the jacking hole 8 of the fixed disk 5 through threaded fit, and the self-locking characteristic of the thread is utilized to ensure the stability during the disassembly process.

[0030] The cushion block 2 is arranged on the bottom end surface of the fixed disk 5 and protrudes from the bottom end surface of the fixed disk 5. The presence of the cushion block 2 makes a certain gap formed between the bottom end surface of the fixed disk 5 and the roll sleeve, so as to facilitate observing the contact state between the jacking bolt 4 and the roll through the gap, improving the operation accuracy. And it improves the disassembly convenience, enabling the operator to easily complete the disassembly task; without using large equipment, reducing the equipment cost and maintenance cost.

[0031] As Figure 2As shown, the connection holes 7 are divided into at least three groups, each group contains at least one connection hole 7, and all groups of connection holes 7 are evenly distributed circumferentially along the axis of the fixed disk 5. The connection between the fixed disk 5 and the roller sleeve is realized from multiple positions, making the connection between the fixed disk 5 and the roller sleeve more uniform and stable, and preventing skew or imbalance during the disassembly process.

[0032] The connection holes 7 in the same group include two connection holes 7, which are spaced apart radially along the fixed disk 5. On the one hand, it increases the redundancy and stability of the connection. Even if one connection hole 7 has a problem, the other connection hole 7 can still maintain the connection. On the other hand, it can also make the connection holes 7 adapt to the preset holes of the roller sleeves at different radial positions, so as to be able to connect roller sleeves of different sizes and specifications.

[0033] The design of multiple groups of connection holes 7 and the cushion blocks 2 enables this disassembly device to adapt to roller sleeves of different specifications and models, improving its versatility and flexibility.

[0034] As Figure 3 shown, there are multiple cushion blocks 2, and they are evenly distributed circumferentially along the axis of the fixed disk 5. The positions where the cushion blocks 2 abut against the roller sleeve are coplanar, ensuring that the gap between the fixed disk 5 and the roller sleeve is uniform, which is beneficial to the smooth movement of the roller sleeve. The cushion blocks 2 are arranged corresponding to the connection holes 7, and each group of connection holes 7 corresponds to one cushion block 2 respectively. So that the connecting piece 3 can pass through the connection hole 7 and the cushion block 2 in sequence and then be connected to the roller sleeve, further enhancing the stability and reliability of the connection.

[0035] In addition, an elastic layer can be set at the position where the cushion block 2 abuts against the roller sleeve. The elastic layer can be made of rubber pads, plastic pads, etc., to prevent the cushion block 2 from scratching and damaging the roller sleeve.

[0036] In this embodiment, the connecting piece 3 can adopt a connecting bolt. In other alternative embodiments, the connecting piece 3 can also adopt external hexagon screws, internal hexagon screws, etc.

[0037] As Figure 2 shown, multiple jacking holes 8 are evenly distributed circumferentially along the axis of the fixed disk 5, and each jacking hole 8 is respectively equipped with a jacking bolt 4. So that the jacking force can act evenly on the roller, avoiding local stress concentration. The jacking bolt 4 penetrates the fixed disk 5, and its end is used to receive external drive, such as a wrench or a power tool, making the rotation operation of the jacking bolt 4 more convenient and efficient.

[0038] The connection hole 7 is a through hole, and the connecting piece 3 adopts a connecting bolt. One end of the connecting bolt abuts against the fixed disk 5, and the other end passes through the connection hole 7 and the cushion block 2 and is fixed to the preset hole on the roller sleeve by threads. The preset hole on the roller sleeve can be a threaded blind hole to ensure the firmness of the connection.

[0039] The fixing plate 5 is provided with a lifting lug 1, and a lifting hole 6 is provided on the lifting lug 1 to cooperate with the lifting device for lifting or moving. The entire disassembly device can be conveniently lifted or moved when needed. The lifting lug 1 is installed at the center of the fixing plate 5, located on the top surface of the fixing plate 5 away from the cushion block 2, which is conducive to maintaining balance and stability during the lifting process.

[0040] The even distribution of multiple groups of connecting holes 7 and pads 2, as well as the redundant design of the connecting piece 3, improves the connection stability between the fixed plate 5 and the grinding roller sleeve. The even distribution of the lifting holes 8 and the through-hole design of the lifting bolts 4 make the disassembly operation more convenient and efficient.

[0041] In this embodiment, Figures 1 - 3 As shown, when using:

[0042] The fixing plate 5 is connected and fixed with the original preset threaded hole on the grinding roller sleeve by using the connecting piece 3.

[0043] A pad 2 is provided between the fixed disk 5 and the grinding roller sleeve, and is used to observe and adjust the connection and fixing conditions between the grinding roller sleeve disassembly device and the grinding roller sleeve when the connecting member 3 is used to fix the fixed disk 5 and the grinding roller sleeve. In this embodiment, eight groups of connecting holes 7 are provided, two in each group, and the two connecting holes 7 in the same group are spaced apart in the radial direction of the fixed disk 5. Two connecting members 3 can be used to connect the two connecting holes 7 in the same group to the grinding roller sleeve at the same time, or a single connecting member 3 can be used to select one of the connecting holes 7 to connect the grinding roller sleeve.

[0044] In other optional embodiments, adjacent groups of connecting holes 7 can be distributed at different radial positions, that is, adjacent groups of connecting holes 7 are at different distances from the central axis of the fixed disk 5, and different grinding roller sleeves are provided with preset holes in different radial positions. Different grinding roller sleeves can be adapted by utilizing diversified distribution of connecting holes 7.

[0045] After the grinding roller sleeve disassembly device and the grinding roller sleeve are connected and fixed, the lifting lug 1 is connected to a lifting device composed of a shackle and a wire rope, and the grinding roller sleeve disassembly device is hoisted by using the lifting device.

[0046] When the grinding roller sleeve and the grinding roller are separated, the lifting bolts 4 are screwed into the three lifting holes 8 on the fixed plate 5. When the lifting bolts 4 are against the grinding roller, the lifting bolts 4 are screwed in sequence and in a cycle to separate the grinding roller sleeve and the grinding roller.

[0047] During installation, the grinding roller sleeve disassembly device can be used to connect the grinding roller sleeve with the connecting bolts, and then installed with the grinding roller.

[0048] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A roll sleeve disassembly device, characterized in that, It includes a fixed disk, on which there are a plurality of connection holes and a plurality of jacking holes. The jacking holes are threaded through holes and are threadedly fitted with jacking bolts. One end of the jacking bolt is a head end, and the other end is a contact end that contacts the grinding roller. The connection holes are fitted with connectors for connecting the grinding roller sleeve; on the bottom end surface of the fixed disk, there are cushion blocks, and the cushion blocks protrude from the bottom end surface of the fixed disk and contact the grinding roller sleeve, so as to form a gap between the bottom end surface of the fixed disk and the grinding roller sleeve.

2. The roll sleeve disassembly device according to claim 1, wherein The connection holes are divided into at least three groups, with at least one connection hole in each group, and all groups of connection holes are evenly distributed circumferentially along the axis of the fixed disk.

3. The roll sleeve disassembly device according to claim 2, characterized in that, The connection holes in the same group include two connection holes, and the connection holes in the same group are spaced apart radially along the fixed disk. The connection holes are through holes, and at least one connection hole in the same group of connection holes is fitted with a connector.

4. The roll sleeve disassembly device according to claim 2 or 3, characterized in that, There are a plurality of the cushion blocks, and all the cushion blocks are evenly distributed circumferentially along the axis of the fixed disk. The positions where the cushion blocks contact the grinding roller sleeve are coplanar.

5. The roll sleeve disassembly device according to claim 4, characterized in that, The cushion blocks are arranged corresponding to the connection holes. Each group of connection holes corresponds to one cushion block, and the connector passes through the connection hole and the cushion block in sequence and then is connected to the grinding roller sleeve.

6. The roll sleeve disassembly device according to claim 1, characterized in that, The plurality of jacking holes are evenly distributed circumferentially along the axis of the fixed disk, and each jacking hole is respectively fitted with a jacking bolt.

7. The roll sleeve disassembly device according to claim 1 or 6, characterized in that The jacking bolt penetrates through the fixed disk, and the head end of the jacking bolt is used to receive external drive.

8. The roll sleeve disassembly device according to claim 1, characterized in that, The connection holes are through holes, the connector is a connection bolt, and the end of the connection bolt abuts against the fixed disk.

9. The roll sleeve disassembly device according to claim 1, characterized in that A lifting lug is installed on the fixed disk, and a lifting hole is provided on the lifting lug to cooperate with a lifting tool.

10. The roll sleeve disassembly device according to claim 9, characterized in that, The lifting lug is installed at the center of the fixed disk, and the lifting lug is located on the top end surface of the fixed disk at the end away from the cushion block.

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