Shaft seal extractor

Abstract

The application provides a shaft seal seat pulling-out device, which comprises a pulling-out support, a pulling-out screw rod spirally connected to the pulling-out support, a force applying connecting end connected to the pulling-out screw rod, and a pulling-out support leg for fixed connection with a flange hole. The shaft seal seat pulling-out device further comprises a top shaft support fixedly connected to the pulling-out support or having a top shaft support leg for fixed connection with the flange hole, a top shaft structure of the top shaft support abutting against an end of an insulating pull rod, and the force applying connecting end comprising a force applying connecting rod extending axially along the flange hole and capable of applying an axial pulling force to the shaft seal seat. By rotating the pulling-out screw rod, the axial pulling force can be transmitted to the shaft seal seat by the force applying connecting end, the shaft seal seat is driven to move axially upward, the top shaft structure limits the insulating pull rod, the shaft seal seat is removed, and then the insulating pull rod is safely taken out.

Description

Technical Field

[0001] This invention relates to a shaft seal seat removal device, belonging to the technical field of inserting or removing sleeves or bearing races. Background Technology

[0002] The ZHW1-126, ZHW1-145, and ZHW1-252 series of composite switchgear have gained attention and favor from the power sector in recent years due to their wide applicability in engineering projects, reliable operation, convenient installation and maintenance, good economic efficiency, and environmental benefits. Furthermore, this product is filled with SF6 insulating gas, providing strong sealing and tight component connections.

[0003] Before this series of equipment is put into formal use, a product break-in test needs to be completed for the disconnecting switch and grounding switch components. After the test, the equipment must be disassembled and cleaned, and the insulating tie rods need to be removed during the disassembly and cleaning process. A cross-sectional diagram of the composite combined electrical appliance, which reflects the position and structure of the insulating tie rods, can be found here. Figure 1 The composite electrical unit includes a housing 111, a transmission component for the disconnecting switch and grounding switch 112, and an insulating pull rod 113 connected to the transmission component 112. The insulating pull rod 113 passes through a mounting port 114 and is sealed by a shaft seal seat 115. The mounting port 114 has flange holes along its circumference that connect to a cover plate 116. Due to structural factors, disassembling the insulating pull rod requires first removing the shaft seal seat. After removing the shaft seal seat, the insulating pull rod can be easily removed. However, the shaft seal seat and the insulating pull rod are tightly sealed and connected, and there is a lack of leverage points during removal, making removal difficult. Furthermore, the insulating pull rod is made of a highly insulating material with high hardness and brittleness. If force is applied to the shaft seal seat through the threaded hole to remove it, it is essential to ensure that no bending force is generated to interfere with it; otherwise, the insulating pull rod is easily damaged.

[0004] Chinese utility model patent with announcement number CN210335811U and announcement date of April 17, 2020 discloses an oil seal disassembly device, including a bracket, a disassembly component and a rotating handle. In use, the bracket is first supported and fixed, then the disassembly component is used to clamp the oil seal, and the oil seal is removed by rotating the rotating handle to drive the disassembly component to move axially.

[0005] However, the oil seal disassembly device disclosed in the above-mentioned utility model has two main drawbacks. First, its structure is not suitable for the limited working space and conditions when disassembling the shaft seal seat. Second, because the shaft seal seat and the insulating tie rod are too tightly connected, the structure lacks limiting measures and cannot limit or fix the insulating tie rod. If the above-mentioned oil seal disassembly device is used for disassembly, the shaft seal seat and the insulating tie rod can easily come off together. Since the insulating tie rod itself is brittle and easily damaged, disassembling it after it comes off will only put stress directly on the insulating tie rod and the shaft seal seat, which will increase the risk of damage to the insulating tie rod. Summary of the Invention

[0006] The purpose of this invention is to provide a shaft seal removal device to solve the problem of difficulty in removing the shaft seal from the GIS insulating tie rod.

[0007] To achieve the above objectives, the present invention employs the following technical solution: the shaft seal seat pull-out device includes a pull-out sleeve bracket, a pull-out sleeve screw is screwed onto the pull-out sleeve bracket, a force-applying connecting end is connected to the pull-out sleeve screw, the pull-out sleeve bracket has a pull-out sleeve support for fixed connection with the flange hole, the shaft seal seat pull-out device further includes a top shaft bracket, the top shaft bracket is fixedly connected to the pull-out sleeve bracket or the top shaft bracket has a top shaft support for fixed connection with the flange hole and is fixed to the flange hole, the top shaft bracket has a top shaft structure that abuts against the end of the insulating pull rod, the force-applying connecting end includes a force-applying connecting rod extending axially along the flange hole to apply axial tension to the shaft seal seat.

[0008] The beneficial effects of the above technical solution are as follows: The top shaft bracket and the pull-out sleeve bracket are fixedly connected, with the pull-out sleeve bracket fixed to the equipment flange hole via pull-out sleeve feet, or the top shaft bracket and the pull-out sleeve bracket are fixed to the equipment flange hole via top shaft feet and pull-out sleeve feet respectively. Both methods allow the invention to better adapt to the limited working space when disassembling the shaft seal seat. The force-applying connection end and the force-applying connection rod ensure stable transmission of tension to the shaft seal seat. Simultaneously, the top shaft structure limits the insulating pull rod, ensuring its stability. This allows for simple and convenient safe separation of the shaft seal seat from the insulating pull rod.

[0009] Furthermore, the top shaft bracket is fixedly connected to the flange hole, the pull sleeve bracket is higher than the top shaft bracket, the pull sleeve screw is coaxial with the top shaft structure, the force-applying connection end includes a force-applying component connected to the end of the pull sleeve screw, there are two or more force-applying connecting rods connected to the force-applying component, and the force-applying component is located between the top shaft bracket and the pull sleeve bracket.

[0010] The beneficial effects of the above technical solution are as follows: The top shaft support and the pull-out sleeve support are separately installed and fixed to the flange holes, which reduces the external force on the pull-out sleeve support legs and improves the stability and reliability of the shaft seal seat pull-out device. The pull-out sleeve support is higher than the top shaft support, ensuring sufficient installation and working space for the top shaft structure. The use of two or more force-applying connecting rods allows for more balanced force transmission, avoids eccentric forces, and ultimately ensures a safer separation of the insulating tie rod from the shaft seal seat.

[0011] Furthermore, the sleeve support includes three sleeve support legs, the top shaft support includes three top shaft support legs, and both the sleeve support legs and the top shaft support legs are circumferentially offset along the insertion opening at the insulating tie rod. The force-applying connecting rod is provided with three legs offset from the top shaft support legs.

[0012] The beneficial effects of the above technical solution are as follows: Triangles provide stability, and the three legs on both the pull-out sleeve support and the top shaft support ensure the stability of the pull-out sleeve bracket and the top shaft bracket, meeting the stability requirements of the shaft seal seat pull-out device in the most economical way. Simultaneously, the three force-applying connecting rods allow for a more even distribution of pulling force to the shaft seal seat, preventing uneven force distribution and eccentric forces, thus enhancing the reliability of the shaft seal seat pull-out device. The top shaft support and pull-out sleeve support are staggered circumferentially along the insertion opening, and the force-applying connecting rods are also staggered with the top shaft support, ensuring that the components do not interfere with each other and enabling the normal installation of the shaft seal seat pull-out device.

[0013] Furthermore, the pull-out support and / or top shaft support are arc-shaped supports along the circumference of the insertion opening.

[0014] The beneficial effects of the above technical solution are as follows: the sleeve support and the top shaft support are set as arc-shaped supports along the circumference of the insertion port, which can reduce the thickness of the sleeve support and the top shaft support, ensure the stability of the shaft seal seat extraction device and maximize the use of the installation space on the equipment, thus meeting the stability requirements of the shaft seal seat extraction device in the most economical way.

[0015] Furthermore, the force-applying component is a disc-shaped structure, including a force-transmitting disc and an anti-detachment cover fixedly installed on the force-transmitting disc. The anti-detachment cover has a clearance hole, and the pull-out screw passes through the clearance hole and extends into the anti-detachment cover and rotates relative to the anti-detachment cover. The end of the pull-out screw has an anti-detachment end that blocks the anti-detachment cover axially.

[0016] The beneficial effects of the above technical solution are as follows: after the force-applying component and the pull-out screw are installed, they rotate relative to each other, which can ensure that only axial tensile force is transmitted to the force-transmitting component during use, blocking bending stress, and thus realizing the safe separation of the shaft seal seat and the insulating pull rod.

[0017] Furthermore, the force-applying connecting rod has a threaded section for connecting with the flange hole on the shaft seal seat, and the other end passes through the force-applying component and has a stop structure at the end opposite to the threaded section that stops the force-applying component.

[0018] The beneficial effects of the above technical solution are as follows: the stop structure can ensure that the axial tensile force of the force-applying component is transmitted to the connecting rod, and the threaded section of the force-applying connecting rod can make the shaft seal seat more firmly and tightly connected to it, so that the shaft seal seat can be smoothly pulled out of the equipment.

[0019] Furthermore, the force-applying connecting rod is a double-threaded rod, with the bottom threaded section connected to the shaft seal seat and the top threaded section screwed with a nut, which constitutes the stop structure.

[0020] The beneficial effects of the above technical solution are as follows: when fixing the force-applying connecting rod with a nut, a certain gap can be reserved between the force-applying component and the nut to facilitate the screwing of the force-applying connecting rod into the shaft seal seat for fixing. Then the nut is tightened, making the installation of the shaft seal seat pull-out device more convenient and improving work efficiency.

[0021] Furthermore, the middle part of the force-applying connecting rod is provided with a parallel milled surface, which forms a screwing part that is easy to turn with a wrench, so as to facilitate the connection between the bottom threaded section and the shaft seal seat.

[0022] The beneficial effects of the above technical solution are: it facilitates the connection between the threaded section at the bottom of the force-applying connecting rod and the shaft seal seat, thereby improving work efficiency.

[0023] Furthermore, the top shaft structure is axially adjustable on the top shaft bracket.

[0024] The beneficial effects of the above technical solution are as follows: the top shaft structure adopts an adjustable installation form, which can move up and down along the longitudinal axis and be fixed at any position, ensuring its tight fit with the insulating tie rod, avoiding the movement of the insulating tie rod being affected by eccentric force, and making the shaft seal seat and the insulating tie rod more safely separated.

[0025] Furthermore, the top shaft structure includes a top shaft cover plate, the top shaft cover plate includes an upper screw rod, the top shaft bracket is provided with an adjusting screw hole, the upper screw rod is tunably connected to the top shaft bracket through the adjusting screw hole, and the bottom of the top shaft cover plate has a groove that matches the end of the insulating pull rod shaft.

[0026] The beneficial effects of the above technical solution are as follows: the top shaft structure is a top shaft cover plate, and the bottom is provided with a groove that matches the end of the insulating tie rod shaft. On the one hand, this allows the top shaft cover plate to fit more tightly with the insulating tie rod; on the other hand, the cover plate has a larger force application area and more uniform force transmission, ensuring the safety of the insulating tie rod and avoiding damage caused by uneven force. The upper part of the top shaft cover plate is connected to the top shaft bracket by a screw, which facilitates component processing and installation, reduces production costs, and improves work efficiency. Attached Figure Description

[0027] Figure 1 A cross-section of a composite electrical appliance that reflects the positional structure of an insulating tie rod in the prior art;

[0028] Figure 2 This is a perspective view of the shaft seal pull-out device of the present invention;

[0029] Figure 3 This is a perspective view of the shaft seal removal device of the present invention in use;

[0030] Figure 4 This is a front view of the shaft seal removal device of the present invention in use;

[0031] Figure 5 This is a front view of the pull-out screw in this invention;

[0032] Figure 6 This is a perspective view of the top shaft cover plate in this invention;

[0033] Figure 7 This is a cross-sectional view of the top shaft cover plate in this invention;

[0034] Figure 8 This is a perspective view of the anti-cap removal device in this invention;

[0035] Figure 9 This is a cross-sectional view of the anti-detachment cap in this invention.

[0036] In the diagram: 1. Rotary handle; 2. Pull-out screw; 3. Pull-out bracket; 4. Top shaft cover plate; 5. Insulating pull rod shaft end; 6. Force-applying connecting rod; 7. Top shaft bracket; 8. Force transmission plate; 9. Anti-disengagement cover; 10. Pull-out support foot; 11. Top shaft support foot; 12. Mounting hole; 13. Threaded section; 14. Anti-disengagement end; 15. Clearance hole; 16. Stepped surface; 17. Semi-circular hole; 18. Upper screw of top shaft cover plate; 19. Adhesive plate; 20. Force-applying groove; 21. Groove; 111. Equipment housing; 112. Disconnecting switch and grounding switch transmission components; 113. Insulating pull rod; 114. Insertion port; 115. Shaft seal seat; 116. Cover plate. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0039] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0041] One embodiment of the present invention is as follows: Figure 2-9 As shown, the shaft seal seat pull-out device includes a pull-out sleeve bracket 3 and a top shaft bracket 7, which are separately configured.

[0042] The sleeve support 3 includes a threaded hole at the center for the sleeve screw 2 to be screwed in, and three sleeve support legs 10 for fixed connection with the flange hole at the equipment insertion port. The sleeve support legs 10 are arc-shaped along the circumference of the insertion port and are staggered from each other at an angle of 120° along the circumference of the insertion port.

[0043] The pull-out screw 2 is a threaded rod, including a mounting hole 12 at the top for mounting the handle, a threaded section 13 in the middle, and an anti-disengagement end 14 at the bottom, which is connected to the anti-disengagement cover 9. The anti-disengagement cover 9 is a stepped disc structure, including a clearance hole 15 for the pull-out screw 2 to pass through, a stepped surface 16 inside the anti-disengagement cover 9 that engages with the anti-disengagement end 14, and three semi-circular holes 17 at 120° angles to each other on the outer edge for fixed connection with the force transmission plate 8. The inner edge of the force transmission plate 8 has bolt holes for fixing the anti-disengagement cover 9 at positions corresponding to the semi-circular holes 17, and three bolt holes for fixing the force application connecting rod 6 are located 60° off the outer edge from the bolt holes for fixing the anti-disengagement cover 9.

[0044] The force-applying connecting rod 6 is a double-threaded rod with a milled surface in the middle that aligns with the wrench for easy tightening. During assembly, the pull-out screw 2 is passed through the anti-disengagement cover 9. The bottom anti-disengagement end 14 of the pull-out screw 2 is engaged with the stepped surface 16 and rotates relative to the anti-disengagement cover. Then, the force transmission plate 8 is connected and fixed to the semi-circular hole 17 on the anti-disengagement cover 9 through the bolt holes on its inner edge. After fixing, the force-applying connecting rod 6 is installed at the bolt hole position on the outer edge of the force transmission plate 8 using a nut. A certain gap is left between the nut and the force transmission plate 8 to facilitate the later tightening of the force-applying connecting rod onto the shaft seal seat. Then, the pull-out screw 2 is screwed to the pull-out bracket 3, and the handle 1 is installed into the mounting hole 12 on the pull-out screw 2.

[0045] The top shaft bracket 7 includes an adjusting screw hole at the bottom center for screwing the top shaft cover plate 4, and three top shaft support legs 11 for fixed connection with the flange holes at the equipment mounting port. The top shaft support legs 11 are arc-shaped around the mounting port and staggered from each other at a 120° angle around the mounting port. The top shaft cover plate 4 includes an upper screw 18 connected to the top shaft bracket 7 and a mating plate 19 that fits against the insulating tie rod. The upper screw 18 of the top shaft cover plate has a force-applying groove 20 for cooperating with a wrench and a hexagonal hole from the top position for cooperating with a hexagonal wrench. The lower side of the mating plate 19 has a groove 21 that matches the shaft end 5 of the insulating tie rod. During assembly, simply screw the top shaft cover plate 4 onto the top shaft bracket 7 using the upper screw 18.

[0046] When assembled and in use, first connect and fix the top shaft bracket 7 to the original flange hole on the equipment insertion port using bolts through the top shaft support 11. After fixing, use a hex wrench to tighten the upper screw 18 of the top shaft cover plate so that the bottom groove 21 of the top shaft cover plate 4 contacts the end 5 of the insulating pull rod shaft. Then apply a little force to make the two fit more tightly, ensuring the axial limiting and fixing effect. Then connect and fix the pull sleeve bracket 3 to the original flange hole on the equipment insertion port using bolts through the pull sleeve support 10. When fixing, the top shaft support 11 of the top shaft bracket 7 and the pull sleeve support 10 of the pull sleeve bracket 3 are staggered by 60° around the insertion port to make use of the limited installation space without affecting each other. After the two parts are installed, rotate the handle 1 to move the force-applying component composed of the anti-detachment cover 9 and the force transmission plate 8 downward until the force-applying connecting rod 6 contacts the screw hole of the shaft seal seat. Then use a wrench to tighten the force-applying connecting rod 6 onto the shaft seal seat, and then tighten the nut at the upper end of the force-applying connecting rod 6 to fix it.

[0047] Finally, rotating the handle 1 causes the pull sleeve screw 2 to rotate and rise. Since the force-applying component does not rotate, it can only transmit the axial tension to the force-applying connecting rod 6. Therefore, under the action of the pull sleeve screw 2, the force-applying connecting end only rises axially, thus pulling out the shaft seal seat. The insulating pull rod shaft end 5, due to the action of the top shaft cover plate 4, does not experience displacement or bend stress. Ultimately, while ensuring the safety of the insulating pull rod, the shaft seal seat is removed. Finally, the bolts fixing the pull sleeve bracket 3 and the top shaft bracket 7 are removed, the device is disassembled, and the insulating pull rod can be safely removed.

[0048] In other embodiments: the top shaft bracket may not require a top shaft support foot for fixation; it can be directly connected to the pull-out sleeve bracket, forming an integral structure with it. No other adjustments are needed.

[0049] In other embodiments: the number of the pull-out support foot of the pull-out bracket, the top shaft support foot of the top shaft bracket, and the force-applying connecting rod can also be set to four. It is only necessary to ensure that the top shaft support foot of the top shaft bracket is staggered and the force-applying connecting rod is staggered with the top shaft support foot. Other parts do not need to be adjusted.

[0050] In other embodiments: the pull-out sleeve support and the top shaft support do not need to be set as arc-shaped supports extending circumferentially along the insertion opening. In this case, it is only necessary to increase the thickness of the pull-out sleeve support and the top shaft support to ensure that the pull-out sleeve bracket and the top shaft bracket are installed stably. No other parts need to be adjusted.

[0051] In other embodiments: the force-applying component can also adopt a spoke structure, including a spoke-type anti-detachment cover and a spoke-type force transmission plate fixed to the anti-detachment cover. The anti-detachment cover has a clearance hole. The pull-out screw passes through the clearance hole and extends into the anti-detachment cover and rotates relative to the anti-detachment cover. The end of the pull-out screw has an anti-detachment end that blocks the anti-detachment cover axially. Other parts do not need to be adjusted.

[0052] In other embodiments: the stopping structure of the force-applying connecting rod can also be set as a disc-shaped stopping end, as long as the stopping end is larger than the screw hole on the outer edge of the force transmission disc, and other parts do not need to be adjusted.

[0053] In other embodiments: the top shaft structure can also use a screw with a smooth bottom. In this case, it can be directly screwed into the adjustment screw hole of the top shaft bracket, and no other parts need to be adjusted.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A shaft seal seat pull-out device, comprising a pull-out sleeve bracket, wherein a pull-out sleeve screw is screwed onto the pull-out sleeve bracket, and the pull-out sleeve screw is connected to a force-applying connection end, characterized in that: The pull-out bracket has pull-out legs for fixed connection with the flange hole. The shaft seal seat pull-out device also includes a top shaft bracket. The top shaft bracket is fixedly connected to the pull-out bracket, or the top shaft bracket has top shaft legs for fixed connection with the flange hole and is fixed to the flange hole. The top shaft bracket has a top shaft structure that abuts against the end of the insulating tie rod. The force-applying connection end includes a force-applying connection rod extending axially along the flange hole to apply axial tension to the shaft seal seat. The top shaft bracket is fixedly connected to the flange hole, and the pull-out bracket is high... The top shaft support has a pull-out screw coaxial with the top shaft structure. The force-applying connection end includes a force-applying component connected to the end of the pull-out screw. There are two or more force-applying connecting rods connected to the force-applying component, which is located between the top shaft support and the pull-out support. The force-applying component is a disc-shaped structure, including a force transmission disc and an anti-disengagement cover fixedly installed on the force transmission disc. The anti-disengagement cover has a clearance hole. The pull-out screw passes through the clearance hole and extends into the anti-disengagement cover and rotates relative to the anti-disengagement cover. The end of the pull-out screw has an anti-disengagement end that blocks the anti-disengagement cover axially.

2. The shaft seal seat pull-out device according to claim 1, characterized in that: The sleeve puller bracket includes three sleeve puller legs, and the top shaft bracket includes three top shaft legs. The sleeve puller legs and the top shaft legs are circumferentially offset along the insertion opening at the insulating tie rod. The force-applying connecting rod is provided with three legs offset from the top shaft legs.

3. The shaft seal seat pull-out device according to claim 2, characterized in that: The pull-out support and / or top shaft support are arc-shaped supports that extend circumferentially along the insertion opening.

4. The shaft seal seat extraction device according to any one of claims 1-3, characterized in that: The force-applying connecting rod has a threaded section for connecting with the flange hole on the shaft seal seat, and the other end passes through the force-applying component and has a stop structure at the end opposite to the threaded section that blocks the force-applying component.

5. The shaft seal seat pull-out device according to claim 4, characterized in that: The force-applying connecting rod is a double-threaded rod, with the bottom threaded section connected to the shaft seal seat and the top threaded section screwed with a nut, which constitutes the stop structure.

6. The shaft seal seat pull-out device according to claim 5, characterized in that: The force-applying connecting rod has a parallel milled surface in the middle, which forms a screwing part that is easy to turn with a wrench, so as to facilitate the connection between the bottom threaded section and the shaft seal seat.

7. The shaft seal seat extraction device according to any one of claims 1-3, characterized in that: The top shaft structure is axially adjustable on the top shaft bracket.

8. The shaft seal seat pull-out device according to claim 7, characterized in that: The top shaft structure includes a top shaft cover plate, the top shaft cover plate includes an upper screw rod, the top shaft bracket is provided with an adjusting screw hole, the upper screw rod is tunably connected to the top shaft bracket through the adjusting screw hole, and the bottom of the top shaft cover plate has a groove that matches the end of the insulating pull rod shaft.

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