Method for disassembling disc spring of hydraulic operating mechanism and disassembling system thereof

Abstract

A hydraulic operating mechanism disc spring dismounting method and a dismounting system thereof, comprising a turning-over tool, a spring pressing tool, a spring pressing support and a lifting tool, the turning-over tool is used for installing and turning over the operating mechanism, the spring pressing tool is used for compressing the disc spring on the operating mechanism, the spring pressing support is used for being installed to the bottom flange of the operating mechanism, the nut on the stroke pull rod at the bottom flange is dismounted or installed through the spring pressing support, and the lifting tool is used for lifting the disc spring. The present application solves the problem of the operating mechanism spring dismounting work in the factory, replaces the traditional factory repair with the field repair, saves the construction period and human capital, and also describes the steps of the operating mechanism disc spring dismounting and installation in detail, which has great guiding significance for the disassembly and repair of the operating mechanism.

Description

Technical Field

[0001] This invention relates to the field of maintenance technology for high-voltage circuit breaker operating mechanisms, and in particular to a method for disassembling and assembling disc springs of hydraulic operating mechanisms and its disassembly system. Background Technology

[0002] The operating mechanism of a high-voltage circuit breaker is the device that enables rapid opening and closing actions. During operation, its internal oil pressure reaches approximately 600 bar, which is also the compressive force borne by the disc springs of the operating mechanism. The disassembly and assembly of the disc springs in the high-voltage circuit breaker operating mechanism is a crucial part of on-site disassembly and maintenance. The operating mechanism itself weighs 0.8 tons, and the disc springs account for more than two-thirds of its weight. Therefore, on-site spring compression poses high safety risks, is extremely difficult, and requires highly sophisticated techniques. Currently, there is no simple method for disassembling and assembling the disc springs of the high-voltage circuit breaker operating mechanism at the maintenance site. Summary of the Invention

[0003] The main objective of this invention is to provide a method for disassembling and assembling disc springs in a hydraulic operating mechanism, used for disassembling and assembling disc springs in the operating mechanism of a high-voltage circuit breaker.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a method for disassembling and assembling a disc spring in a hydraulic operating mechanism, comprising a disassembly method and an installation method, wherein the disassembly method includes the following steps: S10. Install the lifting lugs onto the top cover of the operating mechanism, and use lifting equipment to install the operating mechanism onto the turning fixture; S11. Rotate the operating mechanism using the turning tool to remove the bottom cover of the operating mechanism; S12. Install lifting eye bolts on the threaded hole at the bottom of the high-pressure cylinder of the operating mechanism, and use lifting equipment to place the operating mechanism on the moving platform of the compression spring fixture, wherein one end of the top cover of the operating mechanism is placed on the moving platform and one end of the bottom flange of the operating mechanism faces upward. S13. Move the operating mechanism to below the jack of the spring fixture using a mobile platform, and place the spring support on the bottom flange of the operating mechanism; S14. Press the jack of the spring fixture, and after the bottom flange moves down, remove the nut on the travel rod, and then the jack gradually retracts; S15. Move the operating mechanism out using a mobile platform, and lift the upper disc spring of the operating mechanism out using a lifting device; The installation method includes the following steps: S21. Place the operating mechanism of the disc spring to be installed onto the moving platform of the compression spring fixture, wherein one end of the top cover of the operating mechanism is placed on the moving platform, and one end of the bottom plug of the high pressure cylinder of the operating mechanism faces upward. The disc spring is then hoisted and installed onto the operating mechanism using a lifting device. S22. Install guide columns on the bottom plug of the high-pressure cylinder of the operating mechanism, lift the disc spring onto the operating mechanism using a lifting device, and place the bottom flange on the top disc spring; S23. Move the operating mechanism to below the jack of the spring fixture using the mobile platform, and place the spring support on the bottom flange; S24. Pressurize the jack of the spring fixture. After the thread of the travel rod passes through the bottom flange, install the nut on the travel rod, and then the jack gradually retracts. S25. Remove the compression spring support, move the operating mechanism out using the moving platform, install the lifting eye bolt on the threaded hole at the bottom of the high-pressure cylinder of the operating mechanism, and use lifting equipment to hoist the operating mechanism onto the turning fixture and install the bottom cover.

[0005] In S11, the lifting lugs installed on the top cover of the operating mechanism are removed, and the overturning fixture drives the operating mechanism to rotate so that the bottom cover of the operating mechanism is tilted upward. Marking lines are made on the bottom plug of the high-pressure cylinder and the bottom cover. The operating mechanism is rotated further so that the bottom plug of the high-pressure cylinder connected to the bottom cover of the operating mechanism is longitudinally upward.

[0006] In S13, the bottom plug of the high-pressure cylinder of the operating mechanism is aligned with the center of the jack, and the top of the bottom plug of the high-pressure cylinder is checked by a spirit level. If it is not level, a shim is inserted at the bottom of the moving platform to adjust the level. Then the moving platform is fixed to the frame of the compression spring fixture.

[0007] In S14, before pressurizing, place a support plate above the spring support as needed. After placement, confirm that the support plate is level, check that the travel lever of the operating mechanism is at its highest position, tighten the pressure relief valve of the operating mechanism, and place a support plate above the travel lever of the operating mechanism. Pressurize the jack of the spring fixture to move the piston rod of the jack downwards. The piston rod gradually contacts the support plate on the spring support. When the oil pressure reaches 320 bar, remove the nuts on the travel levers in opposite directions, and then operate the piston rod of the jack to retract.

[0008] In S21, the top cover of the operating mechanism engages with the limiting groove on the moving platform to limit the movement. The limiting groove locks the top cover, thus releasing the lifting ring bolt on the bottom plug of the high-pressure cylinder.

[0009] In S22, the guide column is connected to the bottom plug of the high-pressure cylinder with 6 bolts. The guide column plays a guiding role. Then, the bottom flange is placed on the disc spring at the top, and the top of the travel rod passes through the hole on the bottom flange.

[0010] In S23, a support plate is placed above the compression spring support as needed. After placement, it is confirmed that the support plate is level, and a protective plate is placed below the detection rod of the operating mechanism.

[0011] In step S24, pressurize the jack to slowly move the piston rod downwards until it contacts the adjusting plate on the compression spring support. During pressurization, constantly monitor the pressure gauge, ensure the disc spring compression is smooth, and check for any jamming as the guide column passes through the bottom flange, the travel rod's passage through the bottom flange, and the detection rod's contact with the lower protective plate. If the detection rod contacts the protective plate during installation, immediately stop pressurizing, release the pressure, and raise the travel rod back to its highest position before resuming the pressurization process. Once the oil pressure reaches 320 bar, pressurize intermittently. When the thread at the top of the travel rod exceeds the bottom flange, install the nuts on the travel rod using the intervals on the compression spring support, and apply torque symmetrically with a torque wrench to recheck the torque. After all procedures are completed and confirmed to be correct, gradually retract the jack to complete the disc spring installation.

[0012] In S15, after the removal of the disc springs from the operating mechanism is completed, the operating mechanism is smoothly pushed out of the spring clamp. First, the bottom flange is removed, and the lifting device is installed on the lifting equipment. The lifting device is slowly lowered from the center directly above the operating mechanism. When the support foot of the lifting device is lower than the bottom disc spring, the lifting device stops descending and rotates the support foot to the inside and locks it in place. The lifting device is then lifted upwards, so that the disc springs and the cylinder of the operating mechanism gradually separate. After the two are completely separated, the lifting device carrying the disc springs is lifted to a sleeper where the disc springs can be placed. Then, the marked disc spring assemblies are separated one by one using the lifting device. The four sets of disc spring assemblies are inspected and pressure tested. After the disc spring assemblies pass the inspection, the disc springs are reinstalled, transported, and lifted in reverse order.

[0013] A hydraulic operating mechanism disc spring disassembly and assembly system is provided to implement the aforementioned hydraulic operating mechanism disc spring disassembly and assembly method. The disassembly and assembly system includes a turning fixture, a spring compression fixture, a spring compression support, and a lifting device. The turning fixture is used to install the operating mechanism and turn it over. The spring compression fixture is used to compress the disc spring on the operating mechanism. The spring compression support is used to install onto the bottom flange of the operating mechanism, and the spring compression support is used to disassemble or install the nut located at the bottom flange on the travel rod. The lifting device is used to lift the disc spring.

[0014] The present invention has the following beneficial effects: This invention solves the problem of disassembling and assembling the pressure spring of the operating mechanism in the factory. It replaces the traditional return-to-factory maintenance with on-site inspection, saving time and manpower. At the same time, it details the steps of disassembling and installing the disc spring of the operating mechanism, which has great guiding significance for the disassembly and maintenance of the operating mechanism. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the operating mechanism.

[0017] Figure 2 This is a structural diagram of the turning workwear.

[0018] Figure 3 This is a schematic diagram of the compression spring fixture.

[0019] Figure 4 This is a schematic diagram showing the operating mechanism, to be installed with a disc spring, placed on a mobile platform.

[0020] Figure 5 This is a schematic diagram showing the disc spring placed behind the operating mechanism.

[0021] Figure 6 This is a diagram showing the mobile platform moving under the jack.

[0022] Figure 7 This is a schematic diagram of a compression spring support installed on the bottom flange.

[0023] Figure 8 This is a schematic diagram of the lifting device.

[0024] In the diagram: operating mechanism 10, top cover 11, lifting lug 12, bottom cover 13, disc spring 14, bottom flange 15, high-pressure cylinder bottom plug 16, stroke tie rod 17, detection tie rod 18, protective plate 19, turning fixture 20, compression spring fixture 30, moving platform 31, jack 32, compression spring support 40, pressure plate 41, pressure claw 42, lifting device 50, cage body 51, support foot 52, guide column 60. Detailed Implementation

[0025] Example 1: See Figure 1-8 As shown, a method for disassembling and assembling a disc spring in a hydraulic operating mechanism includes a disassembly method and an installation method. The disassembly method includes the following steps: S10. Install the lifting lug 12 onto the top cover 11 of the operating mechanism 10, and use lifting equipment to install the operating mechanism 10 onto the turning fixture 20; S11. Rotate the operating mechanism 10 using the turning fixture 20 to remove the bottom cover 13 of the operating mechanism 10; S12. Install a lifting eye bolt on the threaded hole of the high-pressure cylinder bottom plug 16 of the operating mechanism 10, and use a lifting device to place the operating mechanism 10 on the moving platform 31 of the compression spring fixture 30, wherein one end of the top cover 11 of the operating mechanism 10 is placed on the moving platform 31, and one end of the bottom flange 15 of the operating mechanism 10 faces upward. S13. Move the operating mechanism 10 to below the jack 32 of the spring tooling 30 via the moving platform 31, and place the spring support 40 on the bottom flange 15 of the operating mechanism 10. S14. Pressurize the jack 32 of the spring tooling 30. After the bottom flange 15 moves down, remove the nut on the travel rod 17. Then the jack 32 gradually retracts. S15. Move the operating mechanism 10 out using the mobile platform 31, and lift the upper disc spring 14 of the operating mechanism 10 out using the lifting device 50; The installation method includes the following steps: S21. See also Figure 4 Place the operating mechanism 10, to be installed with the disc spring 14, onto the moving platform 31 of the compression spring fixture 30, with one end of the top cover 11 of the operating mechanism 10 resting on the moving platform 31, and one end of the high-pressure cylinder bottom plug 16 of the operating mechanism 10 facing upwards. (See attached image) Figure 5 The disc spring 14 is hoisted and installed onto the operating mechanism 10 using the lifting device 50; S22. Install guide column 60 on the high pressure cylinder bottom plug 16 of operating mechanism 10, hoist disc spring 14 onto operating mechanism 10 using lifting device 50, and place bottom flange 15 onto top disc spring 14; S23. See also Figure 6 The operating mechanism 10 is moved to the jack 32 of the spring tooling 30 via the mobile platform 31, and the spring support 40 is placed on the bottom flange 15. S24. Press the jack 32 of the spring tooling 30. After the thread of the travel rod 17 passes through the bottom flange 15, install the nut on the travel rod 17. Then the jack 32 gradually retracts. S25. Remove the compression spring support 40, move the operating mechanism 10 out via the moving platform 31, install the lifting eye bolt on the threaded hole of the high pressure cylinder bottom plug 16 of the operating mechanism 10, and use lifting equipment to hoist the operating mechanism 10 onto the turning fixture 20 and install the bottom cover 13.

[0026] Through the above steps, the disc springs of the operating mechanism 10 can be disassembled or installed. This invention solves the problem of disassembling and assembling the operating mechanism springs in the factory, replacing the traditional return-to-factory repair with on-site maintenance, saving time and manpower. It also details the steps for disassembling and installing the disc springs of the operating mechanism, providing significant guidance for the disassembly and repair of operating mechanisms.

[0027] In step S11, the lifting lug 12 installed on the top cover 11 of the operating mechanism 10 is removed. The turning fixture 20 drives the operating mechanism 10 to rotate, so that the bottom cover 13 of the operating mechanism 10 faces upward at an angle. Marking lines are made on the bottom plug 16 of the high-pressure cylinder and the bottom cover 13 to facilitate alignment during later installation. The operating mechanism 10 is then rotated further, so that the bottom plug 16 of the high-pressure cylinder, which is connected to the bottom cover 13 of the operating mechanism 10, faces upward longitudinally. The turning fixture 20 is used to flip the operating mechanism 10.

[0028] In step S13, the high-pressure cylinder bottom plug 16 of the operating mechanism 10 is aligned with the center of the jack 32. A spirit level is used to check if the top of the high-pressure cylinder bottom plug 16 is level. If it is not level, shims are inserted at the bottom of the moving platform 31 to adjust the level. Then, the moving platform 31 is fixed to the frame of the compression spring fixture 30. Adjusting the level ensures the stability and safety of the pressurization.

[0029] In S14, before pressurization, a support plate is placed above the spring support 40 as needed. After placement, it is confirmed that the support plate is level, and the travel lever 17 of the operating mechanism 10 is checked to ensure it is at its highest position. The pressure relief valve of the operating mechanism 10 is tightened, and a support plate is placed above the travel lever 17 of the operating mechanism 10. The jack 32 of the spring tooling 30 is pressurized, causing the piston rod of the jack 32 to move downwards. The piston rod gradually contacts the support plate on the spring support 40. When the oil pressure reaches 320 bar, the nuts on the travel lever 17 are removed one by one. Then, the piston rod of the jack 32 is retracted. Installing a support plate on the spring support 40 ensures a suitable height and allows the spring support 40 to be removed after the spring pressurization is complete. This is because after the nuts on the travel lever 17 are removed, the disc spring is extended, and the travel of the disc spring increases, making it inconvenient to remove the spring support 40.

[0030] In S21, the top cover 11 of the operating mechanism 10 engages with the limiting groove 33 on the moving platform 31 for limiting, see [reference]. Figure 3 The limiting groove 33 can hold the top cover 11 to ensure the stability of the operating mechanism 10 placed on the moving platform 31. Then, the lifting ring bolt on the bottom plug 16 of the high pressure cylinder is loosened.

[0031] See S22. Figure 4 , 5 The guide post 60 is connected to the high-pressure cylinder bottom plug 16 by six bolts. The guide post 60 serves as a guide. Then, the bottom flange 15 is placed on the top disc spring 14, and the top end of the travel rod 17 passes through the hole on the bottom flange 15. Only after the guide post 60 is installed can the high-pressure cylinder bottom plug 16 smoothly enter the inner hole of the bottom flange 15.

[0032] In step S23, a support plate is placed above the compression spring support 40 as needed. After placement, it is confirmed that the support plate is level, and a protective plate 19 is placed below the detection pull rod 18 of the operating mechanism 10. The protective plate 19 is used to protect the detection pull rod 18. Preferably, the protective plate 19 is a wooden board or a wooden block.

[0033] See S24. Figure 4-6Pressurize jack 32 to slowly move the piston rod downwards until it contacts the adjusting plate on the spring support 40. During pressurization, constantly monitor the pressure gauge, ensure the disc spring is compressed smoothly, and ensure the guide column 60 passes through the bottom flange 15 without jamming. Also, monitor the travel rod 17 as it passes through the bottom flange 15 and ensure the detection rod 18 does not contact the lower protective plate. If the detection rod 18 contacts the protective plate 19 during installation, immediately stop pressurizing, release the pressure, remove all operating devices, and raise the travel rod 17 to its highest position before resuming the pressurization operation. Once the oil pressure reaches 320 bar, pressurize intermittently. When the thread at the top of the travel rod 17 exceeds the bottom flange 15, install the nut on the travel rod 17 through the gap on the spring support 40, and apply torque symmetrically with a torque wrench to recheck the torque. After all procedures are completed and confirmed to be correct, gradually retract jack 32 to complete the disc spring installation. Through the above steps, the disc spring 14 can be compressed smoothly, and the top of the travel rod 17 can pass smoothly through the bottom flange 15, and the detection rod 18 can be bent due to the compression of the disc spring during the compression process.

[0034] In S15, after the removal of the disc spring 14 of the operating mechanism 10 is completed, the operating mechanism 10 is smoothly pushed out of the spring clamp 30. First, the bottom flange 15 is removed, and the lifting device 50 is installed on the lifting equipment. The lifting device 50 is slowly lowered from the center directly above the operating mechanism 10. When the support foot 52 of the lifting device 50 is lower than the lowest disc spring, the lifting device 50 stops descending and rotates the support foot 52 to the inside and locks it. The lifting device 50 is then lifted upwards, so that the disc spring 14 is gradually separated from the cylinder of the operating mechanism. After the two are completely separated, the lifting device 50 carrying the disc spring is lifted to a sleeper where the disc spring can be placed. Then, the marked disc spring assemblies are separated one by one using the lifting device 50. The four sets of disc spring assemblies are inspected and pressure tested. After the disc spring assemblies pass the inspection, the disc spring reinstallation, transfer and lifting work can be carried out in reverse order. Through the above steps, the disc spring 14 can be hoisted, and not only can the disc spring be hoisted as a whole, but the disc spring assemblies can also be separated into groups, which facilitates the inspection and pressure test of the four groups of disc spring assemblies.

[0035] Example 2: A hydraulic operating mechanism disc spring disassembly and assembly system is provided to implement the aforementioned hydraulic operating mechanism disc spring disassembly and assembly method. The disassembly and assembly system includes a turning fixture 20, a spring compression fixture 30, a spring compression support 40, and a lifting device 50. The turning fixture 20 is used to install the operating mechanism 10 and turn the operating mechanism 10 over. The spring compression fixture 30 is used to compress the disc spring 14 on the operating mechanism 10. The spring compression support 40 is used to install onto the bottom flange 15 of the operating mechanism 10. The spring compression support 40 is used to disassemble or install the nut located at the bottom flange 15 on the travel rod 17. The lifting device 50 is used to lift the disc spring 14.

[0036] See Figure 2 The present invention uses a turning fixture 20, which includes a frame. The lower end of the frame is fixed to the ground. A motor reducer is installed on the frame. A U-shaped frame is installed on the output shaft of the motor reducer. The flange ring at the waist of the operating mechanism 10 is bolted to both ends of the U-shaped frame. During operation, the operating mechanism 10 is located inside the U-shaped frame.

[0037] See Figure 3 The present invention employs a spring-loaded fixture 30, which includes a frame. A slide rail is provided on one side of the frame, and a movable platform 31 is slidably mounted on the slide rail. The bottom of the movable platform 31 is provided with a groove, and the movable platform 31 is placed on the slide rail through the groove. The bottom of the movable platform 31 can be connected to the slide rail through a hydraulic cylinder, thereby pushing and pulling the movable platform 31 to move along the slide rail. It has good load-bearing capacity and stability. A jack 32 is installed on the top of the frame. The jack 32 is a hydraulic cylinder, which is connected to a hydraulic pump station through a hydraulic hose. A pressure gauge is installed on the hydraulic pump station. Figure 3 An openable protective baffle is installed around the frame.

[0038] See Figure 7 The present invention employs a compression spring support 40, which includes a pressure plate 41 and compression claws 42 disposed on the lower side of the pressure plate 41. The lower end of the compression claws 42 has an annular groove. In use, the upper end face of the bottom flange 15 is engaged within the annular groove. There is a gap between adjacent compression claws 42, and the mounting holes on the bottom flange 15 correspond to the gaps between adjacent compression claws 42, facilitating the installation of a nut and the application of torque to the nut after the threaded end of the travel rod 17 passes through the mounting hole.

[0039] See Figure 8 The present invention employs a lifting device 50, which includes a cage body 51 and support legs 52. The cage body 51 is similar to a birdcage. At least three support legs 52 are evenly installed on the lower end of the cage body 51 by bolts in a ring. When the bolts are loosened, the support legs 52 can rotate, making it easy for the cage body 51 to fit into the disc spring 14. After the disc spring 14 is fitted in, the support legs 52 are rotated so that the support legs 52 face inward and the bolts are tightened, so that the support legs 52 are located on the lower side of the disc spring 14, and the disc spring can be lifted.

Claims

1. A hydraulic operating mechanism disc spring dismounting method characterized by, This includes a disassembly method and an installation method, wherein the disassembly method includes the following steps: S10. Install the lifting lug (12) onto the top cover (11) of the operating mechanism (10), and use the lifting equipment to lift the operating mechanism (10) onto the turning fixture (20); S11. Rotate the operating mechanism (10) using the turning fixture (20) to remove the bottom cover (13) of the operating mechanism (10). S12. Install a lifting eye bolt on the threaded hole of the high pressure cylinder bottom plug (16) of the operating mechanism (10), and use a lifting device to place the operating mechanism (10) on the moving platform (31) of the compression spring fixture (30), wherein one end of the top cover (11) of the operating mechanism (10) is placed on the moving platform (31), and one end of the bottom flange (15) of the operating mechanism (10) faces upward; S13. Move the operating mechanism (10) to the jack (32) of the spring fixture (30) via the moving platform (31), and place the spring support (40) on the bottom flange (15) of the operating mechanism (10). S14. Press the jack (32) of the spring fixture (30) down, and after the bottom flange (15) moves down, remove the nut on the travel rod (17), and then the jack (32) gradually retracts. S15. Move the operating mechanism (10) out using the mobile platform (31), and lift the disc spring (14) on the operating mechanism (10) out using the lifting device (50); The installation method includes the following steps: S21. Place the operating mechanism (10) of the disc spring (14) to be installed on the moving platform (31) of the compression spring fixture (30), wherein one end of the top cover (11) of the operating mechanism (10) is placed on the moving platform (31), and one end of the high pressure cylinder bottom plug (16) of the operating mechanism (10) faces upward. The disc spring (14) is hoisted and installed on the operating mechanism (10) by the hoist (50). S22. Install guide column (60) on the high pressure cylinder bottom plug (16) of the operating mechanism (10), lift disc spring (14) onto the operating mechanism (10) by means of lifting tool (50), and place bottom flange (15) on top disc spring (14); S23. Move the operating mechanism (10) to the jack (32) of the spring fixture (30) via the moving platform (31) and place the spring support (40) on the bottom flange (15); S24. Press the jack (32) of the spring fixture (30) and after the thread of the travel rod (17) passes through the bottom flange (15), install the nut on the travel rod (17), and then the jack (32) gradually retracts. S25. Remove the spring support (40), move the operating mechanism (10) out via the moving platform (31), install the lifting eye bolt on the threaded hole of the high pressure cylinder bottom plug (16) of the operating mechanism (10), and use the lifting equipment to lift the operating mechanism (10) onto the turning fixture (20) and install the bottom cover (13).

2. The hydraulic operating mechanism disc spring dismounting method according to claim 1, characterized by In S11, the lifting lug (12) installed on the top cover (11) of the operating mechanism (10) is removed, and the turning tool (20) drives the operating mechanism (10) to rotate, so that the bottom cover (13) of the operating mechanism (10) is tilted upward. Marking lines are made on the bottom plug (16) of the high pressure cylinder and the bottom cover (13). The operating mechanism (10) is rotated again, so that the bottom plug (16) of the high pressure cylinder connected to the bottom cover (13) of the operating mechanism (10) is longitudinally upward.

3. The method for disassembling and assembling a disc spring in a hydraulic operating mechanism according to claim 1, characterized in that, In S13, the high-pressure cylinder bottom plug (16) of the operating mechanism (10) is aligned with the center of the jack (32), and the top of the high-pressure cylinder bottom plug (16) is checked by a level ruler to see if it is level. If it is not level, the level is adjusted by inserting a shim at the bottom of the moving platform (31), and then the moving platform (31) is fixed to the frame of the spring fixture (30).

4. The method for disassembling and assembling a disc spring in a hydraulic operating mechanism according to claim 1, characterized in that, In S14, before pressurizing, a support plate is placed above the spring support (40) as needed. After placement, it is confirmed that the support plate is placed horizontally. The travel lever (17) of the operating mechanism (10) is checked to see if it is in the highest position. The pressure relief valve of the operating mechanism (10) is tightened, and a support plate is placed above the travel lever (17) of the operating mechanism (10). The jack (32) of the spring fixture (30) is pressurized, so that the piston rod of the jack (32) moves downward and the piston rod gradually contacts the support plate on the spring support (40). When the oil pressure reaches 320 bar, the nuts on the travel lever (17) are removed in opposite directions. Then the piston rod of the jack (32) is operated to retract.

5. The method for disassembling and assembling a disc spring in a hydraulic operating mechanism according to claim 1, characterized in that, In S21, the top cover (11) of the operating mechanism (10) cooperates with the limiting groove (33) on the moving platform (31) to limit the movement. The limiting groove (33) locks the top cover (11) and releases the lifting ring bolt on the bottom plug (16) of the high pressure cylinder.

6. The method for disassembling and assembling a disc spring in a hydraulic operating mechanism according to claim 1, characterized in that, In S22, the guide post (60) is connected to the bottom plug (16) of the high pressure cylinder with 6 bolts. The guide post (60) plays a guiding role. Then, the bottom flange (15) is placed on the top disc spring (14). The top of the travel rod (17) passes through the hole on the bottom flange (15).

7. The method for disassembling and assembling a disc spring in a hydraulic operating mechanism according to claim 1, characterized in that, In S23, a support plate is placed above the compression spring support (40) as needed. After placement, it is confirmed that the support plate is placed horizontally, and a protective plate (19) is placed below the detection pull rod (18) of the operating mechanism (10).

8. A method for disassembling and assembling a disc spring in a hydraulic operating mechanism according to claim 7, characterized in that, In S24, the jack (32) is pressed down, causing the piston rod to slowly move downwards and gradually contact the adjusting plate on the spring support (40). During the pressing process, the pressure gauge should be monitored constantly to ensure that the disc spring is compressed smoothly. At the same time, the guide column (60) should be checked for any jamming when passing through the bottom flange (15), the travel rod (17) should be checked for passing through the bottom flange (15), and the detection rod (18) should be checked to ensure that it does not contact the lower protective plate. If the detection rod (18) contacts the protective plate (19) during the installation process, the pressure gauge should be checked. If pressure is not applied, pressure should be stopped immediately and the pressure released immediately. The travel lever (17) should be raised to the top again before the pressure operation is performed again. After the oil pressure reaches 320 bar, pressure should be applied intermittently. When the thread at the top of the travel lever (17) exceeds the bottom flange (15), the nuts on the travel lever (17) should be installed relative to each other through the gap on the spring support (40). The torque should be applied symmetrically with a torque wrench and the torque should be checked again. After all the procedures are completed, check and confirm that there are no errors. Then, operate the jack (32) to gradually retract and complete the disc spring installation.

9. A method for disassembling and assembling a disc spring in a hydraulic operating mechanism according to claim 1, characterized in that, In S15, after the removal of the disc spring (14) of the operating mechanism (10) is completed, the operating mechanism (10) is smoothly pushed out of the compression spring fixture (30). First, the bottom flange (15) is removed, and the lifting device (50) is installed on the lifting equipment. The lifting device (50) is slowly lowered from the center directly above the operating mechanism (10). When the support foot (52) of the lifting device (50) is lower than the lowest disc spring, the lifting device (50) stops descending and rotates the support foot (52). 52) Move to the inside and lock it in place. Lift the lifting device (50) upwards so that the disc spring (14) and the cylinder of the operating mechanism gradually separate. When the two are completely separated, lift the lifting device (50) carrying the disc spring to the sleeper where the disc spring can be placed. Then, separate the marked disc spring pieces one by one with the lifting device (50). Inspect and pressure test the four disc spring pieces. After the disc spring pieces are qualified, carry out the disc spring reinstallation, transfer and hoisting work in reverse process.

10. A hydraulic operating mechanism disc spring disassembly and assembly system, characterized in that, The disassembly and assembly system for implementing the hydraulic operating mechanism disc spring disassembly and assembly method according to any one of claims 1-9 includes a turning fixture (20), a spring compression fixture (30), a spring compression support (40), and a lifting device (50). The turning fixture (20) is used to install the operating mechanism (10) and turn the operating mechanism (10) over. The spring compression fixture (30) is used to compress the disc spring (14) on the operating mechanism (10). The spring compression support (40) is used to install to the bottom flange (15) of the operating mechanism (10). The spring compression support (40) is used to disassemble or install the nut located at the bottom flange (15) on the travel rod (17). The lifting device (50) is used to lift the disc spring (14).

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