Disassembly and assembly device and method for disc spring fastening nut of high-voltage circuit breaker operating mechanism

Abstract

The device and method for disassembling and assembling the disc spring fastening nut of the operating mechanism of the high-voltage circuit breaker include a support frame unit, a lifting platform unit and a jacking unit. The support frame unit includes a top plate and a bottom plate and a plurality of connecting rods connected between the top plate and the bottom plate. The top plate is provided with a disc spring limiting hole. The lifting platform unit includes a disc spring tray. The lower side of the disc spring tray is provided with a plurality of supporting wheels. The jacking unit includes a jack. The jack is installed in the middle of the upper side of the bottom plate. A support rail seat is installed on the bottom plate, and the support rail seat extends out of the bottom plate for a distance. The disc spring tray can be directional moved on the support rail seat to the support frame unit through the supporting wheels. Through the above structure, a safe and convenient compression of the disc spring is achieved, thereby facilitating the removal or installation of the fastening nut.

Description

Technical Field

[0001] The invention relates to the technical field of high-voltage circuit breaker maintenance, and in particular to a disassembly and assembly device and a disassembly and assembly method for a disc spring fastening nut of a high-voltage circuit breaker operating mechanism. Background Art

[0002] In the power system, various switches such as high-voltage circuit breakers, disconnectors, and grounding switches are extremely critical control and protection devices. They can control the operation and stop of equipment lines in the system. When a line fails in the system, the faulty line and equipment can be quickly cut off to ensure the safety of the equipment and maintain the normal operation of other parts of the power system.

[0003] As the actuator of high-voltage circuit breakers, the operating mechanism is one of the essential core components in the power system. The safety and reliability of the operating mechanism are directly related to whether the power system can operate safely and reliably. The operating mechanism mainly includes hydraulic operating mechanism, spring operating mechanism and pneumatic operating mechanism. The spring operating mechanism has become the preferred mechanism due to its fast response, small size, light weight, simple structure, low operating noise and no pollution to the environment.

[0004] The spring operating mechanism uses the energy-stored disc spring as a power source to realize the opening and closing of the high-voltage circuit breaker. To effectively realize the opening and closing, the disc spring must be compressed to the energy storage stroke. At the same time, when the spring operating mechanism is inspected and repaired, the disc spring must also be compressed to a reasonable stroke to transfer the compressive force to the tooling, so that the disc spring fastening nut can be disassembled and assembled to complete the disassembly of the disc spring group. The existing compression spring equipment is a simple bracket and a hydraulic jack. The operating jack compresses the disc spring from the top downward to transfer the disc spring compressive force to the bracket. Due to structural limitations, the top pressure contact surface of the bracket and the disc spring interferes with the disassembly and assembly of the disc spring fastening nut, and the inspection space is cramped, which is very inconvenient to use.

[0005] Chinese patent document CN207414758U also discloses a compression spring tooling for a hydraulic spring operating mechanism. When in use, the disc spring assembly needs to be placed on a jack. Since the disc spring assembly is heavy, it is inconvenient to place it. In addition, using multiple jacks to press the disc spring assembly may easily cause an unbalanced lifting force, causing a safety risk.

[0006] Summary of the invention:

[0007] The technical problem to be solved by the present invention is: to solve the problems existing in the above-mentioned background technology, and to provide a disassembly and assembly device and disassembly and assembly method for a disc spring fastening nut of a high-voltage circuit breaker operating mechanism, so as to realize safe and convenient compression of the disc spring, thereby facilitating the removal or installation of the fastening nut.

[0008] In order to achieve the above-mentioned technical features, the purpose of the present invention is achieved as follows: A high-voltage circuit breaker operating mechanism disc spring fastening nut disassembly and assembly device includes a support frame unit, a lifting platform unit and a jacking unit, the support frame unit includes a top plate and a bottom plate and a plurality of connecting rods connected between the top plate and the bottom plate, a disc spring limiting hole is arranged on the top plate, the lifting platform unit includes a disc spring tray, a plurality of supporting wheels are arranged on the lower side of the disc spring tray, the jacking unit includes a jack, the jack is installed in the middle part of the upper side of the bottom plate, a supporting rail seat is installed on the bottom plate, and the supporting rail seat extends out of the bottom plate for a distance, and the disc spring tray can be moved in a directed manner on the supporting rail seat into the support frame unit through the supporting wheels.

[0009] The connecting rod is a butt joint structure.

[0010] The connecting rod includes an upper rod connected to the lower side of the top plate and a lower rod connected to the upper side of the bottom plate. The lower side of the upper rod is connected to a docking sleeve, which is provided with a connecting hole. The upper end of the lower rod can be inserted into the docking sleeve and is provided with a through hole corresponding to the position of the connecting hole. The pin is inserted into the connecting hole on the docking sleeve and the through hole on the lower rod to connect and limit the upper rod and the lower rod.

[0011] The support rail seat is a U-shaped structure, one side of the two end portions of the support rail seat is connected to the bottom plate, and the upper side of the support rail seat is provided with a guide groove for guiding the rolling of the support wheel.

[0012] The front end of the disc spring tray is provided with two limit pins, and telescopic pins are respectively provided on both sides of the rear end of the disc spring tray. The connecting rod of the support frame unit is respectively provided with lifting limit grooves corresponding to the limit pins and the telescopic pins, and a limit ring is also provided at the center of the upper middle part of the disc spring tray corresponding to the center of the jack; the telescopic pin is slidably and telescopically connected with the disc spring tray, and can be telescopically limited by the limit mechanism; a slide groove is provided on the disc spring tray between the two telescopic pins, and the limit mechanism includes an insertion rod and a locking wedge, the locking wedge is rotatably installed on the insertion rod, and limit pieces are respectively provided at both ends of the locking wedge on the insertion rod, and a positioning block is provided on one end of the insertion rod located in the slide groove, and a positioning groove for hooking the positioning block is also provided in the slide groove. The telescopic pin is installed with a positioning ring at one end located in the slide groove, and a spring is installed on the telescopic pin between the positioning ring and the other end of the telescopic pin. A limiting hole is also provided on one side of the slide corresponding to the plug-in rod. The plug-in rod is pushed, and the locking wedge block squeezes the telescopic pins on both sides. The telescopic pins extend outward, and one end of the plug-in rod located in the slide is inserted into the limiting hole. The plug-in rod is rotated, and the positioning block hooks the positioning slot to limit the telescopic pin.

[0013] A push-pull handrail is also installed on the disc spring tray.

[0014] A pressure sensor is installed on the top of the piston rod of the jack, and a displacement sensor is installed on the side of the jack. The pressure sensor and the displacement sensor are electrically connected to the control display.

[0015] The lifting unit also includes a hydraulic oil pump, the jack is a hydraulic oil cylinder, the hydraulic oil pump is connected to the jack through a hydraulic pipeline, and the hydraulic oil pump and a control display are installed on the side of the support frame unit.

[0016] The three sides of the support frame unit are provided with a first protective plate, and one side of the disc spring tray is provided with a second protective plate.

[0017] The disassembly and assembly method using the disc spring fastening nut disassembly and assembly device of the high-voltage circuit breaker operating mechanism comprises the following steps:

[0018] S1. Place the disc spring assembly on the disc spring tray and position it using the stop ring on the disc spring tray;

[0019] S2. The disc spring tray and the disc spring assembly above are pushed into the support frame unit by moving the support wheel in a directional manner on the support rail seat;

[0020] S3. Align the limit pin and telescopic pin with the lifting limit slot on the connecting rod, push the plug-in rod, lock the wedge to squeeze the telescopic pins on both sides, extend the telescopic pins outward and insert them into the lifting limit slots on both sides, then rotate the plug-in rod, the positioning block hooks the positioning slot, and limits the telescopic pin, so that the lifting platform unit can only move up and down in the vertical direction. At this time, the disc spring assembly is located directly above the jack and directly below the disc spring limit hole;

[0021] S4. Operate the jack to raise the jack, so that the disc spring tray directly above the jack and the disc spring assembly placed above it rise as a whole;

[0022] S5. After rising for a certain distance, the upper end of the disc spring assembly is stuck in the disc spring limit hole, and the jack continues to rise, compressing the disc spring assembly to a certain height. The jack stops rising, and a wrench is used to remove or install the fastening nut on the upper end of the disc spring assembly. Then the jack descends and the disc spring assembly is pulled out through the lifting platform unit.

[0023] The present invention has the following beneficial effects:

[0024] 1. The support frame unit of the present invention is used to support the position of the limited disc spring group, the lifting platform unit is used to stably place the disc spring group, and the lifting unit is used to lift the disc spring group. When in use, first move the lifting platform unit to the support track seat outside the support frame unit, first place the disc spring group on the disc spring tray of the lifting platform unit, and then push the disc spring tray, and the disc spring tray moves along the support track seat into the support frame unit, and then operate the jack, and the jack lifts the disc spring tray, thereby squeezing the disc spring group, and the central axis of the upper end of the disc spring group extends from the disc spring limiting hole, so as to facilitate the removal or installation of the disc spring fastening nut. Through the above structure, safe and convenient compression of the butterfly spring is achieved, thereby facilitating the removal or installation of the fastening nut.

[0025] 2. The present invention realizes the smooth lifting of the disc spring tray by sliding the limit pin and the telescopic pin up and down with the lifting limit slot respectively, preventing the disc spring tray from shifting horizontally during the lifting process, thereby preventing the occurrence of safety accidents. And through the limit mechanism, the telescopic pin can be extended and positioned, so that the disc spring tray can be translated on the support rail seat, and can move up and down along the lifting limit slot, and prevent the disc spring group from tilting during the lifting process.

[0026] 3. A pressure sensor is installed on the top of the piston rod of the jack of the present invention, and a displacement sensor is installed on the side of the jack. The pressure sensor and the displacement sensor are electrically connected to the control display to form a disc spring group pressure and compression stroke monitoring system, which can monitor the status of the disc spring in real time when the disc spring is compressed. The pressure sensor is used to detect the pressure of the disc spring group when it is compressed, and the displacement sensor is used to detect the stroke of the disc spring group when it is compressed, so as to prevent damage to the spring group during the removal operation of the fastening nut or safety accidents caused by overpressure and overstroke. During the disassembly process, if the pressure sensor detects that the pressure of the disc spring group is too high, or the displacement sensor for compression stroke measurement detects that the compression stroke is too large, the control display will sound an alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 It is a schematic diagram of the structure of the lifting platform unit of the present invention.

[0029] Figure 3 It is a schematic diagram of the top view of the disc spring tray of the present invention.

[0030] Figure 4 for Figure 3 Enlarged structural diagram at A in the middle.

[0031] Figure 5 It is a schematic diagram of the support frame unit structure of the present invention.

[0032] Figure 6 It is a schematic diagram of the structure of the lifting unit of the present invention.

[0033] In the figure: support frame unit 10, top plate 11, bottom plate 12, connecting rod 13, upper rod 131, lower rod 132, docking sleeve 133, connecting hole 134, latch 135, lifting limit slot 136, disc spring limit hole 14, support rail seat 15, first protective plate 16;

[0034] Lifting platform unit 20, disc spring tray 21, slide slot 211, positioning slot 212, limiting hole 213, limiting ring 22, limiting mechanism 23, plug-in rod 231, locking wedge 232, limiting member 233, positioning block 234, supporting wheel 24, telescopic pin 25, positioning ring 251, spring 252, limiting pin 26, push-pull handrail 27, second protective plate 28;

[0035] Lifting unit 30 , hydraulic oil pump 31 , jack 32 , pressure sensor 33 , displacement sensor 34 , control display 35 . DETAILED DESCRIPTION

[0036] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0037] Embodiment 1:

[0038] See also Figure 1-6 The invention discloses a device for disassembling and assembling a disc spring fastening nut of a high-voltage circuit breaker operating mechanism, comprising a support frame unit 10, a lifting platform unit 20 and a lifting unit 30. The support frame unit 10 comprises a top plate 11 and a bottom plate 12 and a plurality of connecting rods 13 connected between the top plate 11 and the bottom plate 12. The top plate 11 is provided with a disc spring limiting hole 14. The lifting platform unit 20 comprises a disc spring tray 21. The lower side of the disc spring tray 21 is provided with a plurality of supporting wheels 24. The lifting unit 30 comprises a jack 32. The jack 32 is installed in the middle of the upper side of the bottom plate 12. A supporting rail seat 15 is installed on the bottom plate 12, and the supporting rail seat 15 extends out of the bottom plate 12 for a distance. The disc spring tray 21 can be directional moved into the support frame unit 10 on the supporting rail seat 15 through the supporting wheels 24. The support frame unit 10 is used to support the position of the limiting disc spring group, the lifting platform unit 20 is used to stably place the disc spring group, and the lifting unit 30 is used to lift the disc spring group. When in use, first move the lifting platform unit 20 to the support rail seat 15 outside the support frame unit 10, place the disc spring group on the disc spring tray 21 of the lifting platform unit 20, and then push the disc spring tray 21, and the disc spring tray 21 moves along the support rail seat 15 to the support frame unit 10, and then operate the jack, the jack lifts the disc spring tray 21, so as to squeeze the disc spring group, and the central axis of the upper end of the disc spring group extends from the disc spring limit hole 14, so as to facilitate the removal or installation of the disc spring fastening nut. Through the above structure, safe and convenient compression of the butterfly spring is achieved, so that the fastening nut is conveniently removed or installed.

[0039] In another embodiment, see Figure 1 The connecting rod 13 is a docking structure. The upper part of the support frame unit 10 can be disassembled to achieve rapid placement of the disc spring group.

[0040] Specifically, the connecting rod 13 includes an upper rod 131 connected to the lower side of the top plate 11 and a lower rod 132 connected to the upper side of the bottom plate 12. The lower side of the upper rod 131 is connected to a docking sleeve 133, and a connecting hole 134 is provided on the docking sleeve 133. The upper end of the lower rod 132 can be inserted into the docking sleeve 133, and a through hole corresponding to the position of the connecting hole 134 is provided. The pin 135 is inserted into the connecting hole 134 on the docking sleeve 133 and the through hole on the lower rod 132 to connect and limit the upper rod 131 and the lower rod 132.

[0041] When in use, first remove the latch 135, take out the top plate 11 and the upper rod 131, move the lifting platform unit 20 into the support frame unit 10, directly hoist the disc spring assembly onto the disc spring tray 21 of the lifting platform unit 20, and then install and fix the top plate 11 and the upper rod 131 to achieve the placement of the disc spring assembly under different working conditions.

[0042] Specifically, the support rail seat 15 is a U-shaped structure, one side of the two ends of the support rail seat 15 is connected to the bottom plate 12, and the upper side of the support rail seat 15 is provided with a guide groove for guiding the rolling of the support wheel 24. The guide groove is provided on the upper side of the support rail seat 15, which improves the stability and accuracy of the lifting platform unit 20 moving on the support rail seat 15. In addition, the extended support rail seat 15 improves the stability of the support frame unit 10.

[0043] See also Figure 3 , 4The front end of the disc spring tray 21 is provided with two limit pins 26, and the rear ends of the disc spring tray 21 are respectively provided with telescopic pins 25. The connecting rod 13 of the support frame unit 10 is provided with lifting limit grooves 136 at the positions corresponding to the limit pins 26 and the telescopic pins 25. The middle part of the upper side of the disc spring tray 21 is also provided with a limit ring 22 corresponding to the center of the jack 32; the telescopic pin 25 is slidably and telescopically connected to the disc spring tray 21, and can be telescopically limited by the limit mechanism 23; the disc spring tray 21 is provided with a slide groove 211 between the two telescopic pins 25, The limiting mechanism 23 includes an insertion rod 231 and a locking wedge 232. The locking wedge 232 is rotatably mounted on the insertion rod 231. The insertion rod 231 is provided with limiting pieces 233 at both ends of the locking wedge 232. The insertion rod 231 is provided with a positioning block 234 at one end located in the slide groove 211. The slide groove 211 is also provided with a positioning groove 212 for the positioning block 234 to hook. The telescopic pin 25 is provided with a positioning ring 251 at one end located in the slide groove 211. The telescopic pin 25 is provided with a spring 252 between the positioning ring 251 and the other end of the telescopic pin 25. A limiting hole 213 is also provided on one side of the slide slot 211 corresponding to the plug-in rod 231. The plug-in rod 231 is pushed, and the locking wedge block 232 squeezes the telescopic pins 25 on both sides, so that the telescopic pins 25 extend outward, and one end of the plug-in rod 231 located in the slide slot 211 is inserted into the limiting hole 213. The plug-in rod 231 is rotated, and the positioning block 234 hooks the positioning slot 212 to limit the telescopic pin 25. The limiting pin 26 and the telescopic pin 25 are respectively guided up and down with the lifting limiting slot 136 to achieve the smooth lifting and lowering of the disc spring tray 21, and the disc spring tray 21 is prevented from shifting horizontally during the lifting process, thereby preventing the occurrence of safety accidents. And through the limiting mechanism 23, the telescopic pin 25 can be extended and positioned, so that the disc spring tray 21 can be translated on the support rail seat 15, and can move up and down along the lifting limiting slot 136, and prevent the disc spring group from tilting during the lifting process. A limiting ring 22 is provided in the middle of the upper side of the disc spring tray 21 to limit the disc spring assembly so that the force is more stable during top pressure.

[0044] See also Figure 1 , 2 A push-pull handrail 27 is also installed on the disc spring tray 21. It is convenient to push the disc spring tray 21 and prevent the disc spring group from tipping over and falling during movement.

[0045] See also Figure 6A pressure sensor 33 is installed on the top of the piston rod of the jack 32, and a displacement sensor 34 is installed on the side of the jack 32. The pressure sensor 33 and the displacement sensor 34 are electrically connected to the control display 35 to form a disc spring group pressure and compression stroke monitoring system, which can monitor the state of the disc spring in real time when the disc spring is compressed. The pressure sensor 33 is used to detect the pressure of the disc spring group when it is compressed, and the displacement sensor 34 is used to detect the stroke of the disc spring group when it is compressed, so as to prevent the spring group from being damaged or safety accidents caused by overpressure and overstroke during the process of tightening the nut and removing the operation.

[0046] During the disassembly and assembly process, if the pressure sensor 33 detects that the disc spring group pressure is too large, or the displacement sensor 34 for measuring the compression stroke detects that the compression stroke is too large, the control display 35 will sound an alarm.

[0047] See also Figure 6 The lifting unit 30 also includes a hydraulic oil pump 31, and the jack 32 is a hydraulic oil cylinder. The hydraulic oil pump 31 and the jack 32 are connected through a hydraulic pipeline. The hydraulic oil pump 31 and the control display 35 are installed on the side of the support frame unit 10. The hydraulic oil cylinder is driven by the hydraulic oil pump 31, and the hydraulic oil pump 31 is driven by a motor, which is more convenient to use and more efficient. Of course, a manual pump can also be used to drive the jack 32.

[0048] Preferably, the pressure sensor 33 is a PLD204M circular plate pressure sensor.

[0049] Preferably, the displacement sensor 34 is a TR3 series linear displacement sensor.

[0050] Preferably, the control display 35 adopts an XSAW series digital display transmitter display screen.

[0051] When in use, the motors controlling the display 35 and the hydraulic oil pump 31 need to be connected to a power source.

[0052] To further increase the safety of the device, see Figure 1 A first protective plate 16 is provided on three sides of the support frame unit 10 , and a second protective plate 28 is provided on one side of the disc spring tray 21 .

[0053] Embodiment 2:

[0054] See also Figure 1 The disassembly and assembly method of the disc spring fastening nut disassembly and assembly device of the high-voltage circuit breaker operating mechanism comprises the following steps:

[0055] S1. Place the disc spring assembly on the disc spring tray 21 and position it using the limiting ring 22 on the disc spring tray 21.

[0056] S2. By moving the support wheel 24 in a directional manner on the support rail seat 15, the disc spring tray 21 and the disc spring assembly above are pushed into the support frame unit 10.

[0057] S3. Align the limit pin 26 and the telescopic pin 25 with the lifting limit slot 136 on the connecting rod 13, push the plug-in rod 231, and lock the wedge block 232 to squeeze the telescopic pins 25 on both sides. The telescopic pins 25 extend outward and insert into the lifting limit slots 136 on both sides. Then rotate the plug-in rod 231, and the positioning block 234 hooks the positioning slot 212 to limit the telescopic pin 25, so that the lifting platform unit 20 can only move up and down in the vertical direction. At this time, the disc spring assembly is located directly above the jack 32 and directly below the disc spring limit hole 14;

[0058] S4. Operate the jack 32 to lift the jack 32, so that the disc spring tray 21 directly above the jack 32 and the disc spring assembly placed thereon rise as a whole, and the lifting stroke is 0-150mm.

[0059] S5. After rising for a certain distance, the upper end of the disc spring assembly is inserted into the disc spring limit hole 14, and the jack 32 continues to rise, compressing the disc spring assembly to a certain height, with a compression range of 0-10mm. The jack 32 stops rising, and a wrench is used to remove or install the fastening nut at the upper end of the disc spring assembly. Then the jack 32 descends, and the disc spring assembly is pulled out through the lifting platform unit 20.

[0060] Embodiment three:

[0061] See also Figure 1 , the height of the support frame unit 10 is about 2m, and the total height of the lifting platform unit 20 including the push-pull handrail 27 is about 0.5m. Therefore, when there is no bridge crane (bridge crane) resource on site, only temporary lifting tools such as small cranes and small forklifts can be used to place the disc spring group on the disc spring tray 21. Since the lifting height of temporary lifting tools such as small cranes and small forklifts is limited, it is necessary to assemble the upper section rod 131 and the lower section rod 132 first, and lock the upper section rod 131 and the lower section rod 132 into a whole through the latch 135. First, pull the lifting platform unit 20 out of the support frame unit 10 through the support rail seat 15, then place the disc spring group on the disc spring tray 21, and then push the lifting platform unit 20 to push the disc spring group into the support frame unit 10, and then lock the lifting platform unit 20.

[0062] If there is a lifting device such as a bridge crane or a crane on site, the lifting height is not limited at this time. The lifting platform unit 20 can be pushed into the support frame unit 10 first, the lifting platform unit 20 can be locked, and the top plate 11 can be disassembled. After the top plate of the support frame unit 10 is removed, the height is about 1.6 meters. Use a bridge crane or a crane to lift the disc spring group of the operating mechanism onto the disc spring tray 21 of the lifting platform unit 20, and then install the top plate 11 above the bottom plate 12. The upper section rod 131 and the lower section rod 132 are locked by the latch 135, and the preparation for lifting the compression spring group is made. In this way, the lifting and placement of the disc spring group under different working conditions can be realized.

Claims

1. A device for disassembling and assembling a disc spring fastening nut of a high-voltage circuit breaker operating mechanism, characterized in that: The invention comprises a support frame unit (10), a lifting platform unit (20) and a lifting unit (30), wherein the support frame unit (10) comprises a top plate (11) and a bottom plate (12) and a plurality of connecting rods (13) connected between the top plate (11) and the bottom plate (12), the top plate (11) is provided with a disc spring limiting hole (14), the lifting platform unit (20) comprises a disc spring tray (21), a plurality of supporting wheels (24) are provided on the lower side of the disc spring tray (21), the lifting unit (30) comprises a jack (32), the jack (32) is installed in the middle part of the upper side of the bottom plate (12), a supporting rail seat (15) is installed on the bottom plate (12), and the supporting rail seat (15) extends out of the bottom plate (12) for a certain distance, and the disc spring tray (21) can be moved in a directional manner on the supporting rail seat (15) into the support frame unit (10) through the supporting wheels (24); The front end of the disc spring tray (21) is provided with two limit pins (26), and the two sides of the rear end of the disc spring tray (21) are respectively provided with telescopic pins (25). The connecting rod (13) of the support frame unit (10) is provided with lifting limit grooves (136) at the positions corresponding to the limit pins (26) and the telescopic pins (25). A limit ring (22) is also provided at the middle of the upper side of the disc spring tray (21) corresponding to the center of the jack (32); the telescopic pin (25) is connected to the disc spring tray (21) in a sliding and telescopic manner, and can be telescopically limited by the limit mechanism (23); a slide groove (211) is provided on the disc spring tray (21) between the two telescopic pins (25), and the limit mechanism (23) includes The plug-in rod (231) comprises a plug-in rod (231) and a locking wedge (232), wherein the locking wedge (232) is rotatably mounted on the plug-in rod (231), and the plug-in rod (231) is provided with stoppers (233) at both ends of the locking wedge (232), and the plug-in rod (231) is provided with a positioning block (234) at one end located in the slide groove (211), and the slide groove (211) is also provided with a positioning groove (212) for hooking the positioning block (234), and the telescopic pin (25) is provided with a positioning ring (251) at one end located in the slide groove (211), and a spring (252) is installed on the telescopic pin (25) between the positioning ring (251) and the other end of the telescopic pin (25), A limiting hole (213) is further provided on one side of the slide groove (211) corresponding to the plug-in rod (231). When the plug-in rod (231) is pushed, the locking wedge block (232) squeezes the telescopic pins (25) on both sides, and the telescopic pins (25) extend outward. One end of the plug-in rod (231) located in the slide groove (211) is inserted into the limiting hole (213). When the plug-in rod (231) is rotated, the positioning block (234) hooks the positioning groove (212) to limit the telescopic pin (25).

2. The high-voltage circuit breaker operating mechanism disc spring fastening nut disassembly and assembly device according to claim 1, characterized in that: The connecting rod (13) is a butt-jointed structure.

3. The high-voltage circuit breaker operating mechanism disc spring fastening nut disassembly and assembly device according to claim 2, characterized in that: The connecting rod (13) comprises an upper rod (131) connected to the lower side of the top plate (11) and a lower rod (132) connected to the upper side of the bottom plate (12); the lower side of the upper rod (131) is connected to a docking sleeve (133); the docking sleeve (133) is provided with a connecting hole (134); the upper end of the lower rod (132) can be inserted into the docking sleeve (133) and is provided with a through hole corresponding to the position of the connecting hole (134); a latch (135) is inserted into the connecting hole (134) on the docking sleeve (133) and the through hole on the lower rod (132) to connect and limit the upper rod (131) and the lower rod (132).

4. The high-voltage circuit breaker operating mechanism disc spring fastening nut disassembly and assembly device according to claim 1, characterized in that: The support rail seat (15) is a U-shaped structure, one side of two end portions of the support rail seat (15) is connected to the bottom plate (12), and a guide groove for guiding the support wheel (24) to roll is provided on the upper side of the support rail seat (15).

5. The high-voltage circuit breaker operating mechanism disc spring fastening nut disassembly and assembly device according to claim 1, characterized in that: A push-pull handrail (27) is also installed on the disc spring tray (21).

6. The high-voltage circuit breaker operating mechanism disc spring fastening nut disassembly and assembly device according to claim 1, characterized in that: A pressure sensor (33) is installed on the top of the piston rod of the jack (32), a displacement sensor (34) is installed on the side of the jack (32), and the pressure sensor (33) and the displacement sensor (34) are electrically connected to the control display (35).

7. The high-voltage circuit breaker operating mechanism disc spring fastening nut disassembly and assembly device according to claim 1 or 6, characterized in that: The lifting unit (30) further comprises a hydraulic oil pump (31); the jack (32) is a hydraulic oil cylinder; the hydraulic oil pump (31) and the jack (32) are connected via a hydraulic pipeline; the hydraulic oil pump (31) and a control display (35) are mounted on a side of the support frame unit (10).

8. The high-voltage circuit breaker operating mechanism disc spring fastening nut disassembly and assembly device according to claim 1, characterized in that: The three sides of the support frame unit (10) are provided with a first protective plate (16), and one side of the disc spring tray (21) is provided with a second protective plate (28).

9. A disassembly and assembly method using the disc spring fastening nut disassembly and assembly device for a high-voltage circuit breaker operating mechanism according to claim 1, characterized in that: The following steps are involved: S1. Place the disc spring assembly on the disc spring tray (21) and position it by the stop ring (22) on the disc spring tray (21); S2. The disc spring tray (21) and the disc spring assembly above are pushed into the support frame unit (10) by the support wheel (24) being directional moved on the support rail seat (15); S3. Align the limit pin (26) and the telescopic pin (25) with the lifting limit slot (136) on the connecting rod (13), push the plug-in rod (231), and the locking wedge block (232) squeezes the telescopic pins (25) on both sides, so that the telescopic pins (25) extend outward and are inserted into the lifting limit slots (136) on both sides. Then, the plug-in rod (231) is rotated, and the positioning block (234) hooks the positioning slot (212), and the telescopic pin (25) is limited, so that the lifting platform unit (20) can only move up and down in the vertical direction. At this time, the disc spring assembly is located directly above the jack (32) and directly below the disc spring limit hole (14); S4. The jack (32) is operated to lift the jack (32) so that the disc spring tray (21) directly above the jack (32) and the disc spring assembly placed above it rise as a whole; S5. After rising for a certain distance, the upper end of the disc spring assembly is inserted into the disc spring limit hole (14), and the jack (32) continues to rise, so that the disc spring assembly is compressed to a certain height. The jack (32) stops rising, and a wrench is used to remove or install the fastening nut at the upper end of the disc spring assembly. Then the jack (32) is lowered, and the disc spring assembly is pulled out through the lifting platform unit (20).

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