A track leveling device for railway track laying construction

Abstract

The present application discloses a kind of track leveling equipment for railway track laying construction, it is related to track traffic equipment technical field, the present application includes track and tamping car, further include: two leveling components, leveling component is used to the ballast around the sleeper is leveled and is handled, the leveling component includes fixed plate, and fixed plate bottom sliding installation has push flat plate, push flat plate is installed on ballast take-off mechanism, ballast take-off mechanism is used to the ballast around the sleeper is collected or the ballast of collected discharge according to the moving distance of push flat plate relative to fixed plate.Occupation is in: can be self-adapting leveling before tamping and real-time sensing ballast compactness and height, and utilize the displacement of push flat plate in leveling process automatically stepless regulation tamping vibration intensity, while the displacement of push flat plate can also trigger ballast take-off mechanism, realize the collection of excess ballast or the release filling of collected ballast, greatly improve tamping quality, energy efficiency and track laying precision.

Description

A track leveling device for railway track laying construction Technical Field

[0001] This invention relates to the field of rail transit equipment technology, and in particular to a track leveling device for railway track laying construction. Background Technology

[0002] In railway track laying construction, in order to ensure the smoothness, stability and train operation safety of the track, it is necessary to tamp the ballast bed under the preliminarily placed track panels. The tamping machine, as the core large track maintenance machinery, uses high-frequency vibration to rearrange, flow and compact the ballast particles, thereby stabilizing the sleepers and improving track accuracy.

[0003] However, existing tamping machines use preset fixed parameters for the vibration power of their tamping units or require manual adjustment by the operator based on experience. There are natural differences in the ballast filling height and density in different sections of the track bed. When encountering areas with excessive or dense ballast, fixed-intensity tamping may fail to achieve effective fluidization and deep compaction due to excessive energy damping, resulting in uneven tamping and poor performance. Conversely, in areas with loose ballast, fixed high-intensity output will result in energy waste and excessive wear on the equipment.

[0004] Therefore, it is necessary to design a track leveling device for railway track laying construction. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a track leveling device for railway track laying construction, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A track leveling device for railway track laying construction includes a track and a tamping machine, and further includes:

[0008] Two leveling components are provided. The leveling components are used to level the ballast around the sleepers. The leveling components include a fixed plate and a push plate is slidably installed on the bottom of the fixed plate. A ballast collection and release mechanism is installed on the push plate. The ballast collection and release mechanism is used to collect the ballast around the sleepers or discharge the collected ballast according to the moving distance of the push plate relative to the fixed plate.

[0009] Two tamping assemblies are used to compact the ballast after it has been leveled around the sleepers. Each tamping assembly includes a tamping box mounted on a tamping vehicle via an electric push rod. The tamping box is equipped with tamping claws, and a power shaft is rotatably mounted inside the tamping box.

[0010] Two drive components are provided. The drive components are used to control the vibration amplitude of the tamping component according to the moving distance of the push plate relative to the fixed plate. The drive components include a connecting frame installed on the tamping vehicle. A drive motor is fixedly installed on the side wall of the connecting frame. The output end of the drive motor is fixedly connected to a drive shaft, and a speed change mechanism is installed between the drive shaft and the power shaft.

[0011] Furthermore, the output end of the electric push rod is fixedly connected to the tamping box, a connecting rod is fixedly installed on the side wall of the output end of the electric push rod, and the connecting rod is fixedly connected to the connecting frame. A guide block is swungly installed at the end of the electric push rod away from the tamping box, and a guide rail that slides with the guide block is provided on the side wall of the tamping vehicle.

[0012] Furthermore, a hydraulic cylinder is fixedly installed on the tamping vehicle, and a mounting bracket is fixedly connected to the output end of the hydraulic cylinder. The mounting bracket is fixedly connected to both fixed plates.

[0013] Furthermore, two T-shaped columns are fixedly installed on the top of the push plate, and two connecting grooves that slide with the corresponding T-shaped columns are opened at the bottom of the fixed plate. Springs are installed between the two connecting grooves and the corresponding T-shaped columns. A cavity is opened inside the push plate, and multiple through holes communicating with the cavity are opened at the bottom of the push plate.

[0014] Furthermore, the ballast delivery mechanism comprises a negative pressure pump, a pressure sensor, a side opening, a fixed column, a mounting plate, a sealing plate, and multiple sealing columns. The negative pressure pump is fixedly installed on the side wall of the fixed plate, and a flexible hose is fixedly connected between the output end of the negative pressure pump and the cavity. The pressure sensor is fixedly installed at the bottom of the push plate and is electrically connected to the negative pressure pump. The side opening is located on the side wall of the push plate and communicates with the cavity. The fixed column is fixedly connected to the bottom of the fixed plate and slides with the push plate. The mounting plate is fixedly installed at the end of the fixed column located in the cavity. The sealing plate is fixedly installed on the side wall of the mounting plate and mates with the side opening. Multiple sealing columns are fixedly installed at the bottom of the mounting plate, and each sealing column corresponds to a corresponding through hole position.

[0015] Furthermore, the transmission mechanism consists of a drive wheel, a fixed disc, a movable disc, and a V-shaped steel belt. The drive wheel is fixedly mounted on the drive shaft, the fixed disc is fixedly mounted on the power shaft, the movable disc is slidably mounted on the power shaft, and the V-shaped steel belt is installed between the movable disc and the drive wheel.

[0016] Furthermore, the power shaft is provided with multiple sliding grooves, and multiple sliders that slide in cooperation with the corresponding sliding grooves are fixedly installed on the inner wall of the moving disk, and a tension spring is installed between each slider and the corresponding sliding groove.

[0017] Furthermore, a pressure seat is fixedly installed on the side wall of the connecting frame, and a piston plate is slidably installed inside the pressure seat. Multiple push rods that are slidably connected to the pressure seat are fixedly installed on the side wall of the piston plate, and a contact block is rotatably installed on the end of each push rod near the moving disk.

[0018] Furthermore, an oil cavity is provided at the bottom of the fixed plate, and a T-shaped piston is fixedly installed on the top of the push plate and slidably connected to the oil cavity. An oil pipe is connected between the end of the oil cavity away from the push plate and the end of the pressure seat near the moving disk.

[0019] Compared with existing technologies, the advantages of this invention are:

[0020] 1. The floating design of the pusher plate allows it to slide along the irregular track bed surface, mechanically leveling it before tamping. At the same time, the movement of the pusher plate relative to the fixed plate can sense the compaction and height of the ballast in real time, providing a direct and reliable mechanical feedback signal for subsequent power adjustment.

[0021] 2: Through the coordination of the speed change mechanism, oil chamber and pressure seat, the transmission ratio between the drive shaft and the power shaft can be automatically adjusted by the up and down movement of the push plate, thereby changing the tamping vibration amplitude, so that the tamping intensity matches the actual resistance of the ballast in real time. In the compacted area, the vibration force is automatically increased to ensure quality, and in the loose area, it is automatically reduced to save energy consumption, which significantly improves the uniformity of tamping and the energy efficiency of the equipment.

[0022] 3: The design of the ballast collection and release mechanism can be used to automatically control the collection of excess ballast or the release and filling of collected ballast by utilizing the up-and-down movement of the push plate. This can effectively correct local unevenness of the track bed, provide a smoother and more uniform working surface for subsequent tamping, and improve the overall track laying accuracy.

[0023] In summary, this invention can adaptively level the ballast before tamping and sense the ballast density and height in real time. It can also automatically and steplessly adjust the tamping vibration intensity by utilizing the displacement of the push plate during the leveling process. At the same time, the displacement of the push plate can also trigger the ballast collection and release mechanism to collect excess ballast or release and fill the collected ballast, which greatly improves the tamping quality, energy efficiency and track laying accuracy. Attached Figure Description

[0024] Figure 1 is a structural schematic diagram of a track leveling device for railway track laying construction proposed in this invention;

[0025] Figure 2 is a schematic diagram of the structure after removing the track from Figure 1;

[0026] Figure 3 is a structural schematic diagram from another perspective of Figure 2;

[0027] Figure 4 is an enlarged schematic diagram of the structure at one of the tamping components in Figure 3;

[0028] Figure 5 is an enlarged schematic diagram of the structure at one of the leveling components in Figure 3;

[0029] Figure 6 is a top view of Figure 5;

[0030] Figure 7 is a schematic diagram of the structure of surface AA in the 6th case;

[0031] Figure 8 is an enlarged schematic diagram of the structure at the mounting plate in Figure 7;

[0032] Figure 9 is an exploded view of the structure at the drive shaft in Figure 4;

[0033] Figure 10 is an enlarged schematic diagram of the structure at the movable disk in Figure 9.

[0034] In the diagram: 1. Track, 2. Tamping trolley, 3. Tamping box, 4. Tamping claw, 5. Mounting frame, 6. Fixing plate, 7. Push plate, 8. Cavity, 9. Through hole, 10. T-shaped column, 11. Connecting groove, 12. Spring, 13. Fixing column, 14. Mounting plate, 15. Sealing column, 16. Negative pressure pump, 17. Pressure sensor, 18. Side opening, 19. Sealing plate, 20. Connecting frame, 21. Drive motor, 22. Drive shaft, 23. Power shaft, 24. Drive wheel, 25. Fixed plate, 26. Moving plate, 27. Slide groove, 28. Slider, 29. Pressure seat, 30. Piston plate, 31. Top rod, 32. Contact block, 33. T-shaped piston, 34. Oil cavity, 35. Electric push rod, 36. V-shaped steel belt. Detailed Implementation

[0035] Referring to Figures 1-3, a track leveling device for railway track laying construction includes a track 1 and a tamping machine 2. The tamping machine 2 operates in the same way as existing tamping machines, moving longitudinally along the track 1 during operation. Its working principle and specific structure are not described here.

[0036] Two tamping assemblies are used to compact the ballast after it has been leveled around the sleepers. The tamping assembly includes a tamping box 3 mounted on the tamping car 2 via an electric push rod 35. The output end of the electric push rod 35 is fixedly connected to the tamping box 3. A guide block is oscillatingly mounted on the end of the electric push rod 35 away from the tamping box 3. A guide rail is provided on the side wall of the tamping car 2, which slides with the guide block. When the electric push rod 35 is working, it drives the tamping box 3 to move up and down. The sliding engagement of the guide block on the guide rail can prevent the electric push rod 35 from being obstructed.

[0037] The tamping box 3 is equipped with tamping claws 4, and a power shaft 23 is rotatably installed inside the tamping box 3. An eccentric cam is installed at one end of the power shaft 23 inside the tamping box 3. When the power shaft 23 rotates at high speed, it drives multiple tamping claws 4 to vibrate, thereby realizing the fluidization and leveling action of the ballast. The connection between the tamping claws 4 and the tamping box 3 is existing technology, and the setting of the eccentric cam is also existing technology. Therefore, the working principle and specific structure will not be described here.

[0038] Referring to Figures 1-10, a track leveling device for railway track laying construction further includes two leveling components. The leveling components are used to level the ballast around the sleepers. The leveling components include a fixed plate 6, and a push plate 7 is slidably installed on the bottom of the fixed plate 6. A hydraulic cylinder is fixedly installed on the tamping machine 2, and the output end of the hydraulic cylinder is fixedly connected to a mounting frame 5. The mounting frame 5 is fixedly connected to both fixed plates 6. When working, the hydraulic cylinder is activated, causing the mounting frame 5 to drive the two fixed plates 6 to move down, thereby causing the push plate 7 to move down and contact the ballast surface. By using the movement of the tamping machine 2, the push plate 7 first levels the ballast surface.

[0039] Two T-shaped posts 10 are fixedly installed on the top of the push plate 7. Two connecting grooves 11 are opened at the bottom of the fixed plate 6 to slide with the corresponding T-shaped posts 10. Springs 12 are installed between the two connecting grooves 11 and the corresponding T-shaped posts 10. The elastic force of the springs 12 applies a force away from the fixed plate 6 to the push plate 7, so that the push plate 7 can apply sufficient pressure to the ballast below it. However, when the ballast is high in height and has a high density, the reaction force applied by the ballast to the push plate 7 will cause the T-shaped posts 10 to overcome the elastic force of the springs 12 and move upward, so that the push plate 7 moves upward and closer to the fixed plate 6.

[0040] The push plate 7 has a cavity 8 inside, and the bottom of the push plate 7 has multiple through holes 9 that communicate with the cavity 8. When the push plate 7 moves normally, if there are some protruding parts of the ballast below it, some of the protruding ballast will enter the cavity 8 through the through holes 9. Then, as the push plate 7 moves, some of the ballast that has entered the cavity 8 will be discharged to other recessed areas, thus improving the leveling effect.

[0041] The push plate 7 is equipped with a ballast collection and release mechanism. The ballast collection and release mechanism is used to collect the ballast around the sleeper or discharge the collected ballast according to the moving distance of the push plate 7 relative to the fixed plate 6. The ballast collection and release mechanism consists of a negative pressure pump 16, a pressure sensor 17, a side opening 18, a fixed column 13, a mounting plate 14, a sealing plate 19, and multiple sealing columns 15.

[0042] The negative pressure pump 16 is fixedly installed on the side wall of the fixed plate 6, and a hose is fixedly connected between the output end of the negative pressure pump 16 and the cavity 8. The pressure sensor 17 is fixedly installed at the bottom of the push plate 7, and the pressure sensor 17 is electrically connected to the negative pressure pump 16. When the push plate 7 moves upward under the action of the ballast reaction force and the pressure sensor 17 contacts the bottom of the mounting plate 6, the pressure sensor 17 transmits an electrical signal to the negative pressure pump 16. At this time, the negative pressure pump 16 runs and generates negative pressure in the cavity 8 through the hose.

[0043] A side opening 18 is formed on the side wall of the push plate 7 and communicates with the cavity 8. A fixing post 13 is fixedly connected to the bottom of the fixing plate 6 and slides with the push plate 7. A mounting plate 14 is fixedly installed on one end of the fixing post 13 located in the cavity 8. A sealing plate 19 is fixedly installed on the side wall of the mounting plate 14 and cooperates with the side opening 18. Multiple sealing posts 15 are fixedly installed on the bottom of the mounting plate 14, and each sealing post 15 corresponds to the position of the corresponding through hole 9. When the push plate 7 moves upward under the reaction force of the ballast and the pressure sensor 17 contacts the bottom of the mounting plate 6, the mounting plate 14 moves downward relative to the push plate 7 because it is fixed to the fixing plate 6. At this time, the multiple sealing posts 15 on it seal the multiple through holes 9, and the sealing plate 19 moves upward. When the side opening 18 is opened, the ballast on the side of the push plate 7 is drawn into the cavity 8 for collection under the action of the negative pressure pump 16. Since the through hole 9 is sealed, the drawn ballast will not be discharged immediately. As the tamping machine 2 moves, the distance between the push plate 7 and the mounting plate 6 will also change due to the change in the height of the ballast. During the process of the push plate 7 moving down and resetting, the sealing column 15 gradually opens the through hole 9. At this time, the ballast in the cavity 8 can be discharged through the through hole 9 to fill the depression. At the same time, the distance between the sealing column 15 and the through hole 9 will control the discharge speed of the ballast. The distance between the sealing column 15 and the through hole 9 is controlled by the reaction force on the push plate 7. Therefore, the discharge speed of the ballast will be adaptively adjusted according to the overall thickness of the ballast below, which effectively improves the uniformity of the leveling.

[0044] Two drive components are provided. The drive components are used to control the vibration amplitude of the tamping component according to the moving distance of the push plate 7 relative to the fixed plate 6. The drive components include a connecting frame 20 installed on the tamping vehicle 2. A connecting rod is fixedly installed on the side wall of the output end of the electric push rod 35 and the connecting rod is fixedly connected to the connecting frame 20. A drive motor 21 is fixedly installed on the side wall of the connecting frame 20. A drive shaft 22 is fixedly connected to the output end of the drive motor 21. A speed change mechanism is installed between the drive shaft 22 and the power shaft 23. The speed change mechanism consists of a drive wheel 24, a fixed plate 25, a moving plate 26 and a V-shaped steel belt 36.

[0045] The drive wheel 24 is fixedly mounted on the drive shaft 22, the fixed disc 25 is fixedly mounted on the power shaft 23, and the movable disc 26 is slidably mounted on the power shaft 23. A V-shaped steel belt 36 is installed between the movable disc 26 and the drive wheel 24. For ease of description, the combination of the fixed disc 25 and the movable disc 26 is named the "driven wheel," and the corresponding drive wheel 24 is named the "driving wheel." The V-shaped steel belt 36 is mainly composed of two nested parts: a metal ring assembly and metal sheets. The metal ring assembly is typically composed of 2-6 layers (commonly 2 or 4 layers) of thin metal rings stacked together, each layer... All metal rings are "seamless annular structures" with multiple layers of tightly nested rings forming a combination structure similar to "concentric circles". The metal sheet is the component that directly contacts the driving wheel and driven wheel of the V-shaped steel belt 36. Through the friction between the V-shaped side of the metal sheet and the conical surface of the wheel set, the torque of the driving wheel is transmitted to the driven wheel. When the driving wheel rotates, the conical surface of the wheel set squeezes the V-shaped working surface of the metal sheet, generating friction to drive the metal sheet to move. The metal sheet drives the metal ring assembly to rotate through the positioning hole, thereby transmitting power to the metal sheet of the driven wheel, and finally driving the driven wheel to rotate, thus realizing torque transmission.

[0046] Multiple grooves 27 are provided on the drive shaft 23. Multiple sliders 28 that slide in cooperation with the corresponding grooves 27 are fixedly installed on the inner wall of the movable disk 26. Each slider 28 is connected to the corresponding groove 27 with a tension spring. The tension spring is installed at the end of the slider 28 near the fixed disk 25. When the movable disk 26 moves on the drive shaft 23, the contact diameter between the driven wheel and the V-shaped steel belt 36 can be adjusted to achieve different transmission ratios between the drive shaft 22 and the drive shaft 23.

[0047] A pressure seat 29 is fixedly installed on the side wall of the connecting frame 20, and a piston plate 30 is slidably installed inside the pressure seat 29. Multiple push rods 31, which are slidably connected to the pressure seat 29, are fixedly installed on the side wall of the piston plate 30. A contact block 32 is rotatably installed at the end of each push rod 31 near the moving disk 26. An oil cavity 34 is opened at the bottom of the fixed plate 6 and filled with hydraulic oil. A T-shaped piston 33, which is slidably connected to the oil cavity 34, is fixedly installed on the top of the push plate 7. An oil pipe connects the end of the oil cavity 34 away from the push plate 7 and the end of the pressure seat 29 near the moving disk 26. The oil pipe is made of plastic. The material hose and oil pipe are not shown in the figure. When the push plate 7 moves upward under the reaction force of the ballast, the T-shaped piston 33 moves upward in the oil chamber 34 at the same time. At this time, the hydraulic oil enters the pressure seat 29 through the oil pipe, causing the piston plate 30 to move towards the end closer to the moving disc 26. At this time, the contact block 32 on the push rod 31 pushes the moving disc 26 closer to the fixed disc 25. The contact diameter between the V-shaped steel belt 36 and the driven wheel decreases, so the transmission ratio of the drive shaft 22 to the power shaft 23 increases. At this time, the power of the tamping box 3 on the corresponding side increases, and the vibration force of the tamping claw 4 on the ballast increases, making the ballast on this side easier to be vibrated and leveled.

[0048] To improve the consistency between leveling and vibration, the push plate 7 can be positioned near the tamping claw 4 or on the outside of the push plate 7. The specific position adjustment method will not be described in detail here.

[0049] The negative pressure pump 16, pressure sensor 17, drive motor 21 and electric push rod 35 are all existing products, and their working principle and specific structure will not be described here.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A track leveling device for railway track laying construction, comprising a track (1) and a tamping machine (2), characterized in that, Also includes: Two leveling components are provided. The leveling components are used to level the ballast around the sleepers. The leveling components include a fixed plate (6), and a push plate (7) is slidably installed on the bottom of the fixed plate (6). A ballast collection and release mechanism is installed on the push plate (7). The ballast collection and release mechanism is used to collect the ballast around the sleepers or discharge the collected ballast according to the moving distance of the push plate (7) relative to the fixed plate (6). Two tamping components are provided. The tamping components are used to compact the leveled ballast around the sleepers. The tamping components include a tamping box (3) installed on the tamping car (2) by an electric push rod (35). A tamping claw (4) is installed on the tamping box (3), and a tamping claw (4) is rotatably installed inside the tamping box (3). The drive shaft (23) has two drive components. The drive components are used to control the vibration amplitude of the tamping component according to the moving distance of the push plate (7) relative to the fixed plate (6). The drive components include a connecting frame (20) installed on the tamping vehicle (2). A drive motor (21) is fixedly installed on the side wall of the connecting frame (20). The output end of the drive motor (21) is fixedly connected to a drive shaft (22), and a speed change mechanism is installed between the drive shaft (22) and the drive shaft (23). Two T-shaped columns (10) are fixedly installed on the top of the push plate (7). Two connecting grooves (11) that slide with the corresponding T-shaped columns (10) are opened at the bottom of the fixed plate (6). Springs (12) are installed between the groove (11) and the corresponding T-shaped column (10). A cavity (8) is opened inside the push plate (7), and multiple through holes (9) communicating with the cavity (8) are opened at the bottom of the push plate (7). The ballast loading and unloading mechanism consists of a negative pressure pump (16), a pressure sensor (17), a side opening (18), a fixed column (13), a mounting plate (14), a sealing plate (19), and multiple sealing columns (15). The negative pressure pump (16) is fixedly installed on the side wall of the fixed plate (6), and a hose is fixedly connected between the output end of the negative pressure pump (16) and the cavity (8). The pressure sensor (17) is fixedly installed at the bottom of the push plate (7), and the pressure sensor... The device (17) is electrically connected to the negative pressure pump (16). The side port (18) is opened on the side wall of the push plate (7) and communicates with the cavity (8). The fixed column (13) is fixedly connected to the bottom of the fixed plate (6) and slides with the push plate (7). The mounting plate (14) is fixedly installed at one end of the fixed column (13) located in the cavity (8). The sealing plate (19) is fixedly installed on the side wall of the mounting plate (14) and cooperates with the side port (18). Multiple sealing columns (15) are fixedly installed at the bottom of the mounting plate (14) and each sealing column (15) corresponds to the position of the corresponding through hole (9).

2. The track leveling equipment for railway track laying construction according to claim 1, characterized in that, The output end of the electric push rod (35) is fixedly connected to the tamping box (3). A connecting rod is fixedly installed on the side wall of the output end of the electric push rod (35), and the connecting rod is fixedly connected to the connecting frame (20). A guide block is swung and installed at the end of the electric push rod (35) away from the tamping box (3). A guide rail that slides with the guide block is provided on the side wall of the tamping vehicle (2).

3. The track leveling equipment for railway track laying construction according to claim 1, characterized in that, A hydraulic cylinder is fixedly installed on the tamping machine (2), and the output end of the hydraulic cylinder is fixedly connected to a mounting bracket (5). The mounting bracket (5) is fixedly connected to two fixing plates (6).

4. The track leveling equipment for railway track laying construction according to claim 1, characterized in that, The transmission mechanism consists of a drive wheel (24), a fixed disc (25), a movable disc (26), and a V-shaped steel belt (36). The drive wheel (24) is fixedly mounted on the drive shaft (22), the fixed disc (25) is fixedly mounted on the power shaft (23), the movable disc (26) is slidably mounted on the power shaft (23), and the V-shaped steel belt (36) is installed between the movable disc (26) and the drive wheel (24).

5. A track leveling device for railway track laying construction according to claim 4, characterized in that, The power shaft (23) has multiple sliding grooves (27), and the inner wall of the movable disk (26) is fixedly installed with multiple sliders (28) that slide in cooperation with the corresponding sliding grooves (27), and each slider (28) is connected to the corresponding sliding groove (27) with a tension spring.

6. A track leveling device for railway track laying construction according to claim 4, characterized in that, A pressure seat (29) is fixedly installed on the side wall of the connecting frame (20), and a piston plate (30) is slidably installed inside the pressure seat (29). Multiple push rods (31) that are slidably connected to the pressure seat (29) are fixedly installed on the side wall of the piston plate (30), and a contact block (32) is rotatably installed at the end of each push rod (31) near the moving disk (26).

7. A track leveling device for railway track laying construction according to claim 6, characterized in that, The bottom of the fixed plate (6) is provided with an oil cavity (34), and the top of the push plate (7) is fixedly installed with a T-shaped piston (33) that is in a sealed sliding connection with the oil cavity (34). An oil pipe is connected between the end of the oil cavity (34) away from the push plate (7) and the end of the pressure seat (29) near the moving disk (26).

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