Guide vane sleeve cold assembly shaft sleeve dismounting tool

Abstract

The utility model discloses a guide vane sleeve cold assembly shaft sleeve dismounting tool, which is used for dismounting a cold assembly shaft sleeve in a guide vane sleeve, and comprises a hollow jack, a screw rod, a mounting nut, a plum blossom plate and a limiting piece which are collinear in axial lead, the plum blossom plate is sleeved at the first end of the screw rod, and a round hole is formed in the center of the plum blossom plate; the diameter of the round hole is larger than that of the screw rod, the plum blossom plate is matched with the end face of the shaft sleeve when in a horizontal state, the plum blossom plate is matched with the inner diameter of the shaft sleeve when in an inclined state, the limiting piece is detachably connected with the first end of the screw rod, and the bottom face of the plum blossom plate makes contact with the limiting piece. The shaft sleeve dismounting device is simple in structure, the shaft sleeve can be easily and quickly dismounted, the requirement for operators is lowered, the working efficiency is improved, the labor intensity is lowered to a great extent, and meanwhile the safety in the dismounting process is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of demolition tools, and particularly relates to a demolition tool for a cold-mounted bushing of a guide vane sleeve. Background Technique

[0002] The cold-mounted bushing of the guide vane sleeve is installed on the inner ring of the guide vane sleeve, mainly of a steel-backed polyoxymethylene structure. The steel back has an interference fit with the inner ring of the guide vane sleeve. It is necessary to cool and shrink the bushing with liquid nitrogen before installation. The inner ring of the steel back is attached with polyoxymethylene material for self-lubrication. The main function of the cold-mounted bushing is mainly used for the central limit of the movable guide vane, providing a radial restraint force during the rotation of the movable guide vane, and providing a self-lubrication function to reduce the rotational friction resistance of the movable guide vane. After long-term operation, the polyoxymethylene lubricating material of the bushing will wear and consume, increasing the inner diameter of the bushing and losing the central positioning and lubrication functions. Therefore, the bushing needs to be disassembled and replaced after running for a certain number of years. Each guide vane sleeve is equipped with middle and upper bushings, and the bushings are of a cold-mounted structure.

[0003] When the cold-mounted bushing is disassembled conventionally, generally, part of the polyoxymethylene material is cleaned with a angle grinder, and two L-shaped frames are symmetrically welded on the steel back at the cleaned position. Two screw jacks are used to symmetrically and evenly lift it for disassembly. During the disassembly process, two people are required to operate the screw jacks, and two people support the L-shaped frames to prevent the L-shaped frames from losing force at the moment of removing the cold-mounted bushing, resulting in a center of gravity shift, the collapse of the screw jacks and the L-shaped frames, and the situation of injuring the demolition personnel. During the lifting process of the two screw jacks, it is also necessary to lift horizontally to make the force on the bushing symmetric and balanced, otherwise it will cause the bushing to be eccentric and increase the removal force, resulting in the tearing of the welding position of the L-shaped frame and the damage of the sleeve. At the same time, for each removed bushing, the welded L-shaped frame needs to be cut off and then reinstalled on the next bushing, and so on until all the bushings are removed. Therefore, the conventional method for removing the cold-mounted bushing of the guide vane sleeve not only has a large labor intensity, complex processes, is not easy to operate, but also has low efficiency and there are unsafe factors. Content of the Utility Model

[0004] The purpose of the utility model is to provide a demolition tool for a cold-mounted bushing of a guide vane sleeve to solve the problems mentioned in the above background technique.

[0005] To solve the above technical problems, the present utility model provides a cold-fitted bushing removal tool for a guide vane sleeve, which is used to remove the cold-fitted bushing inside the guide vane sleeve. It includes a hollow jack, a screw rod, a mounting nut, a plum blossom plate and a limiting member with collinear central axes. The hollow jack is installed above the sleeve. The screw rod is arranged longitudinally, and its first end penetrates through the hollow jack and is located inside the sleeve. The mounting nut is threadedly connected to the second end of the screw rod and contacts the top surface of the hollow jack. The plum blossom plate is sleeved on the first end of the screw rod, and a round hole is opened at the center position thereof. The diameter of the round hole is larger than the diameter of the screw rod. When the plum blossom plate is in a horizontal state, it is adapted to the end face of the bushing. When the plum blossom plate is in an inclined state, it is adapted to the inner diameter of the bushing. The limiting member is detachably connected to the first end of the screw rod and contacts the bottom surface of the plum blossom plate.

[0006] Further, the plum blossom plate is in the shape of three plum blossom leaves, and the outer edge of the bottom surface of the plum blossom plate is chamfered.

[0007] Further, it further includes a first backing plate, which is sleeved on the second end of the screw rod, and its two side surfaces respectively contact the mounting nut and the hollow jack.

[0008] Further, a first spare nut is arranged on the outer side of the mounting nut. The first spare nut is threadedly connected to the screw rod and contacts the mounting nut.

[0009] Further, the limiting member includes a second backing plate, a supporting nut and a second spare nut. The diameter of the second backing plate is adapted to the inner diameter of the bushing. The second backing plate is sleeved on the screw rod and contacts the plum blossom plate. The supporting nut is threadedly connected to the screw rod and contacts the second backing plate. The second spare nut is threadedly connected to the screw rod and contacts the bottom surface of the supporting nut.

[0010] Further, it further includes a support ring, which is provided with a through hole longitudinally penetrating therethrough, and its inner diameter is larger than the outer diameter of the bushing. An annular groove adapted to the hollow jack is opened at the top of the support ring. The bottom of the support ring contacts the sleeve.

[0011] Further, a limiting groove extending inward from the bottom surface of the support ring is opened on the inner wall of the support ring, and the limiting groove is adapted to the outer wall of the sleeve.

[0012] Further, it further includes a support tube placed inside the sleeve. The support tube is provided with a receiving hole longitudinally penetrating therethrough, and the receiving hole is adapted to the screw rod. The top surface of the support tube contacts the limiting member.

[0013] The beneficial effects of the present utility model are as follows: The structure of the present utility model is simple, and the bushing can be easily and quickly removed, reducing the requirements for operators, improving work efficiency, greatly reducing labor intensity, and further enhancing the safety during the removal process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram when removing the upper bushing in an embodiment of the present utility model.

[0015] Figure 2 It is a schematic structural diagram when removing the middle bushing in an embodiment of the present utility model.

[0016] Figure 3 It is a schematic structural diagram of the plum blossom plate in an embodiment of the present utility model.

[0017] Wherein: 1. Sleeve; 2. Bushing; 3. Hollow jack; 4. Screw; 5. Mounting nut; 6. Plum blossom plate; 7. Limiting member; 8. First backing plate; 9. First spare nut; 10. Support ring; 11. Limiting groove; 12. Support pipe.

[0018] 21. Upper bushing; 22. Middle bushing; 71. Second backing plate; 72. Support nut; 73. Second spare nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only one embodiment of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] To make the objectives, technical solutions, and advantages of the present application clearer, the following further elaborates on the present application in detail in conjunction with the accompanying drawings and specific embodiments.

[0021] In the following description, references to "one embodiment", "an embodiment", "one example", "an example", etc. indicate that the described embodiment or example may include specific features, structures, characteristics, properties, elements, or limitations, but not every embodiment or example necessarily includes specific features, structures, characteristics, properties, elements, or limitations. Additionally, repeated use of the phrase "according to an embodiment of the present application" may, although possibly, refer to the same embodiment, but not necessarily to the same embodiment.

[0022] As Figures 1-3As shown in the figure, the present utility model discloses a cold-fitted bushing 2 removal tool for a guide vane sleeve 1, which is used to remove the cold-fitted bushing 2 inside the guide vane sleeve 1. It includes a hollow jack 3, a screw rod 4, a mounting nut 5, a plum blossom plate 6 and a limiting member 7 with collinear central axes. The hollow jack 3 is installed above the sleeve 1. The screw rod 4 is arranged longitudinally, and its first end penetrates through the hollow jack 3 and is located inside the sleeve 1. The mounting nut 5 is threadedly connected to the second end of the screw rod 4 and contacts the top surface of the hollow jack 3. The plum blossom plate 6 is sleeved on the first end of the screw rod 4, and a round hole is opened at the center position thereof. The diameter of the round hole is larger than the diameter of the screw rod 4. When the plum blossom plate 6 is in a horizontal state, it is adapted to the end face of the bushing 2. When the plum blossom plate 6 is in an inclined state, it is adapted to the inner diameter of the bushing 2. The limiting member 7 is detachably connected to the first end of the screw rod 4 and contacts the bottom surface of the plum blossom plate 6. In this embodiment, the mounting nut 5 is a high-strength carbon steel nut, and the plum blossom plate 6 is a 45# forged round plate, which has a certain strength and stiffness, ensuring a certain bearing capacity and a certain anti-destruction ability.

[0023] When the present utility model is in use, the staff first installs the limiting member 7 on the first end of the screw rod 4, then inserts the plum blossom plate 6 into the screw rod 4, tilts the plum blossom plate 6 so that the plum blossom plate 6 passes through the center of the bushing 2 to the lower side of the bushing 2, and then installs the hollow jack 3 through the central hole of the screw rod 4 on the top of the sleeve 1. Then, a nut is screwed into the upper end of the screw rod 4 until the screw rod 4 is lifted, so that the plum blossom plate 6 is tightly attached to the lower end of the bushing 2.

[0024] After the installation is completed, the hollow jack 3 is lifted. The middle part of the jack rises, generating an upward sleeve pulling force and a downward sleeve pulling reaction force. The sleeve pulling reaction force is transmitted to the sleeve 1 through the bottom of the hollow jack 3. The nut transmits the sleeve pulling force to the screw rod 4 through the screw thread of the screw rod 4. The screw rod 4 transmits the sleeve pulling force to the lower end, and the lower end transmits the force to the limiting member 7 through the screw thread. The limiting member 7 transmits the sleeve pulling force to the plum blossom plate 6, and the plum blossom plate 6 transmits the force to the bushing 2. The bushing 2 is lifted and pulled out under the action of the sleeve pulling force.

[0025] The structure of the present utility model is simple, and it can easily and quickly remove the bushing 2, reducing the requirements for operators, improving work efficiency, greatly reducing labor intensity, and further improving the safety of the removal process.

[0026] In one embodiment, the plum blossom plate 6 is in the shape of three plum blossom leaves, and the outer edge of the bottom surface of the plum blossom plate 6 is chamfered. When the effective diameter is greater than the inner hole diameter of the cold-fitted bushing 2, it can be tilted and installed to the lower end of the bushing 2 through the inner hole of the bushing 2. While having sufficient strength and stiffness to pull out the bushing 2 without damage, it reduces the sharp corners when contacting the bushing 2 and reduces the scraping generated during the removal process.

[0027] In one embodiment, it further includes a first backing plate 8. The first backing plate 8 is sleeved on the second end of the screw rod 4, and its two sides are respectively in contact with the mounting nut 5 and the hollow jack 3. In this embodiment, the first backing plate 8 is a high-strength carbon steel circular plate, and its function is to increase the stress area of the mounting nut 5 and increase the bearing capacity of the mounting nut 5.

[0028] In one embodiment, a first spare nut 9 is arranged on the outer side of the mounting nut 5. The first spare nut 9 is threadedly connected to the screw rod 4 and is in contact with the mounting nut 5. The first spare nut 9 is a high-strength carbon steel nut consistent with the mounting nut 5, and its function is the same as that of the nut, mainly to increase the threaded stress area of the screw rod 4 and increase the bearing capacity of the screw rod 4.

[0029] In one embodiment, the limiting member 7 includes a second backing plate 71, a supporting nut 72 and a second spare nut 73. The diameter of the second backing plate 71 is adapted to the inner diameter of the bushing 2. The second backing plate 71 is sleeved on the screw rod 4 and is in contact with the plum blossom plate 6. The supporting nut 72 is threadedly connected to the screw rod 4 and is in contact with the second backing plate 71. The second spare nut 73 is threadedly connected to the screw rod 4 and is in contact with the bottom surface of the supporting nut 72. That is, the second backing plate 71, the supporting nut 72 and the second spare nut 73 are sequentially installed on the screw rod 4 below the plum blossom plate 6. The design is simple and convenient to use. In this embodiment, both the supporting nut 72 and the second spare nut 73 are high-strength carbon steel nuts, and the second backing plate 71 is a high-strength carbon steel circular plate.

[0030] In one embodiment, it further includes a support ring 10. The support ring 10 is provided with a through hole longitudinally penetrating therethrough, and its inner diameter is larger than the outer diameter of the bushing 2, ensuring that no additional pressure or damage is caused to the bushing 2 during the removal process. A circular groove adapted to the hollow jack 3 is opened at the top of the support ring 10 for the positioning and installation of the hollow jack 3. The bottom of the support ring 10 is in contact with the sleeve 1, making the entire removal tool more stable when applying pressure, reducing the possibility of shaking and tilting.

[0031] In one embodiment, a limiting groove 11 extending inward from the bottom surface of the support ring 10 is opened on the inner wall of the support ring 10. The limiting groove 11 is adapted to the outer wall of the sleeve 1. When installing the support ring 10 on the middle bushing 22 during removal, the support ring 10 can be positioned and installed on the outer edge of the sleeve 1, automatically centering and firmly positioning.

[0032] In one embodiment, it further includes a support tube 12 placed inside the sleeve 1. The support tube 12 is provided with a receiving hole longitudinally penetrating therethrough. The receiving hole is adapted to the screw rod 4. The top surface of the support tube 12 is in contact with the limiting member 7. When installing this removal tool, it can be temporarily placed. That is, after installing the plum blossom plate 6, the screw rod 4 is inserted into the receiving hole, and the limiting member 7 is placed on the top surface of the support tube 12, providing additional support force for preparing to install the hollow jack 3.

[0033] The working principle of this embodiment is as follows:

[0034] First, rotate the lower end of the screw rod 4 into the support nut 72 and the second spare nut 73, and install the second backing plate 71 through the central hole at the upper end of the screw rod 4 to the upper end of the support nut 72. Install the plum blossom plate 6 through the central hole at the upper end of the screw rod 4 to the upper end of the second backing plate 71. Then install the support ring 10 to the top of the sleeve 1, and adjust the center of the support ring 10 to be consistent with the center of the upper shaft sleeve 21. If the middle shaft sleeve 22 is removed, install the inner groove of the support ring 10 to the outer edge of the sleeve 1 for center positioning. Then place the support tube 12 at the central position inside the sleeve 1. Then lift the screw rod 4 and tilt the plum blossom plate 6 so that the plum blossom plate 6 passes through the shaft sleeve 2 to the lower end of the shaft sleeve 2, insert the screw rod 4 into the receiving hole on the support tube 12, and place the support nut 72, the second spare nut 73, the second backing plate 71, and the plum blossom plate 6 on the support tube 12. Then install the central hole of the hollow jack 3 through the upper end of the screw rod 4 into the annular groove on the support ring 10. Then install the central hole of the first backing plate 8 through the upper end of the screw rod 4 to the upper end of the hollow jack 3. Then screw in the mounting nut 5 from the upper end of the screw rod 4 to lift the screw rod 4, and press the plum blossom plate 6 tightly against the lower end of the shaft sleeve 2. Finally, screw in the first spare nut 9 from the upper end of the screw rod 4 until it is in tight contact with the mounting nut 5.

[0035] After all the components of the cold installation shaft sleeve 2 removal tool for the guide vane sleeve 1 are installed, lift the hollow jack 3. The middle part of the jack rises, generating an upward sleeve pulling force and a downward sleeve pulling reaction force. The sleeve pulling reaction force is transmitted through the bottom of the hollow jack 3 to the support ring 10, and the support ring 10 transmits the sleeve pulling reaction force to the sleeve 1. The sleeve pulling force is transmitted through the first backing plate 8 to the mounting nut 5. The mounting nut 5 distributes the sleeve pulling force evenly to the first spare nut 9. The mounting nut 5 and the first spare nut 9 transmit the sleeve pulling force to the screw rod 4 through the screw threads with the screw rod 4. The screw rod 4 transmits the sleeve pulling force to the lower end, and the lower end transmits the force to the support nut 72 and the second spare nut 73 through the screw threads. The support nut 72 transmits the sleeve pulling force to the second backing plate 71, the second backing plate 71 transmits the sleeve pulling force to the plum blossom plate 6, and the plum blossom plate 6 transmits the force to the shaft sleeve 2. The shaft sleeve 2 is lifted and pulled out under the action of the sleeve pulling force.

[0036] The structure of the utility model is simple, and it can easily and quickly remove the shaft sleeve 2, reducing the requirements for operators, improving work efficiency, greatly reducing labor intensity, and further improving the safety of the removal process.

[0037] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cold-fitted bushing removal tool for a guide vane sleeve, used to remove the cold-fitted bushing inside the guide vane sleeve, characterized in that: It includes a hollow jack, a screw rod, an installation nut, a plum blossom plate and a limiting member with their central axes collinear. The hollow jack is installed above the sleeve. The screw rod is arranged longitudinally, and its first end penetrates through the hollow jack and is located inside the sleeve. The installation nut is threadedly connected to the second end of the screw rod and contacts the top surface of the hollow jack. The plum blossom plate is sleeved on the first end of the screw rod, and a round hole is opened at its central position. The diameter of the round hole is larger than the diameter of the screw rod. When the plum blossom plate is in a horizontal state, it is adapted to the end face of the shaft sleeve. When the plum blossom plate is in an inclined state, it is adapted to the inner diameter of the shaft sleeve. The limiting member is detachably connected to the first end of the screw rod and contacts the bottom surface of the plum blossom plate.

2. The cold-fitting bushing removal tool for a guide vane sleeve according to claim 1, wherein: The plum blossom plate is in the shape of three plum blossom leaves, and the outer edge of the bottom surface of the plum blossom plate is chamfered.

3. A removal tool for a cold-fitted shaft sleeve of a guide vane sleeve according to claim 1, characterized in that: It further includes a first backing plate, which is sleeved on the second end of the screw rod, and its two sides respectively contact the installation nut and the hollow jack.

4. A removal tool for a cold-fitted shaft sleeve of a guide vane sleeve according to claim 1, characterized in that: A first spare nut is arranged outside the installation nut. The first spare nut is threadedly connected to the screw rod and contacts the installation nut.

5. A removal tool for a cold-fitted shaft sleeve of a guide vane sleeve according to claim 1, characterized in that: The limiting member includes a second backing plate, a support nut and a second spare nut. The diameter of the second backing plate is adapted to the inner diameter of the shaft sleeve. The second backing plate is sleeved on the screw rod and contacts the plum blossom plate. The support nut is threadedly connected to the screw rod and contacts the second backing plate. The second spare nut is threadedly connected to the screw rod and contacts the bottom surface of the support nut.

6. The cold installation shaft sleeve removal tool for a guide vane sleeve according to claim 1, wherein: It further includes a support ring. A through hole penetrating longitudinally is opened on the support ring, and its inner diameter is larger than the outer diameter of the shaft sleeve. An annular groove adapted to the hollow jack is opened at the top of the support ring. The bottom of the support ring contacts the sleeve.

7. A removal tool for a cold-fitted shaft sleeve of a guide vane sleeve according to claim 6, characterized in that: A limiting groove extending inward along the bottom surface of the support ring is opened on the inner wall of the support ring. The limiting groove is adapted to the outer wall of the sleeve.

8. A removal tool for a cold-fitted shaft sleeve of a guide vane sleeve according to claim 1, characterized in that: It further includes a support tube placed inside the sleeve. A receiving hole penetrating longitudinally is opened on the support tube. The receiving hole is adapted to the screw rod. The top surface of the support tube contacts the limiting member.

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