Pneumatic buffering anti-collision actuator

Abstract

The utility model relates to the technical field of actuators, in particular to a pneumatic buffering anti-collision actuator which comprises an actuator shell, two circular rings are connected into the actuator shell in a sliding mode, springs are fixedly connected to the sides, away from each other, of the two circular rings, and connecting bases are fixedly connected to the lower ends of the two circular rings. A bidirectional threaded rod is rotationally connected into the actuator shell, the bidirectional threaded rod can be manually screwed to rotate, when the bidirectional threaded rod rotates, threads drive two connecting bases to slide towards the position close to the center of the actuator shell, the two connecting bases drive a circular ring to slide, and when the connecting bases slide, springs which are completely compressed assist in driving the connecting bases to slide. The high-pressure gas in the actuator shell is exhausted, it is guaranteed that a valve can still be operated under the emergency condition, safe operation of a system is maintained, and when the actuator shell breaks down and cannot be used, the two-way threaded rod can be manually screwed to help a maintainer to rapidly judge the fault reason.

Description

Technical Field

[0001] The utility model relates to the technical field of actuators, and particularly relates to an anti-collision actuator with pneumatic buffering. Background Art

[0002] A pneumatic actuator is an actuator that uses air pressure to drive the opening, closing or adjustment of a valve. It is also called a pneumatic actuator or a pneumatic device, and is usually called a pneumatic head. A pneumatic actuator generally consists of two parts: a pneumatic drive device and an actuator.

[0003] As disclosed in a Chinese patent: A pneumatic actuator for a valve, patent number: CN219345656U. Through the provided valve body, actuator main body and external connection mechanism, the valve body can be communicated with an external pipe through a connecting flange. The external flange can be hermetically connected with the connecting flange through the cooperation of a sealing seat and a sealing member. The sealing seat and the sealing member can improve the sealing performance between the actuator main body and the external pipe. Through the provided fixing rod and fixing block, the firmness between the connecting flange and the external flange can be improved, ensuring the stability of their connection and avoiding the situation of breakage and detachment, which is convenient for people to use, easy to operate, and increases the applicability of the pneumatic actuator.

[0004] However, in the process of implementing the above technical solution, it is found that there are at least the following technical problems: The above device controls the on-off of the pipeline by filling gas into the actuator. However, the above device lacks a manual control function during use. When the gas source fails and cannot be controlled to interrupt, due to the absence of a manual control function, the on-off of the pipeline cannot be controlled manually, which may cause the entire system to malfunction and affect production or other key processes. Summary of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] In view of the deficiencies of the prior art, the utility model provides an anti-collision actuator with pneumatic buffering, which solves the technical problem that the above device controls the on-off of the pipeline by filling gas into the actuator, but the above device lacks a manual control function during use. When the gas source fails and cannot be controlled to interrupt, due to the absence of a manual control function, the on-off of the pipeline cannot be controlled manually, which may cause the entire system to malfunction and affect production or other key processes.

[0007] (2) Technical Solutions

[0008] To achieve the above object, the utility model is realized through the following technical solutions:

[0009] A pneumatic buffer anti-collision actuator, including an actuator housing, inside which two rings are slidably connected. On one side of each of the two rings away from each other, a spring is fixedly connected. At the lower ends of the two rings, connecting seats are fixedly connected. Inside the actuator housing, a bidirectional threaded rod is rotatably connected. Both connecting seats are threadedly connected to the outer surface of the bidirectional threaded rod. A sealing ring is sleeved on the outer surface of the bidirectional threaded rod. A driving mechanism is sleeved inside the actuator housing, and the driving mechanism includes an air inlet pipe, which is sleeved inside the actuator housing.

[0010] Preferably: Covers are fixedly connected to both sides of the actuator housing.

[0011] Preferably: Two groups of slide rails are fixedly connected to the inner surface of the actuator housing, and a gear shaft rod is rotatably connected inside the actuator housing.

[0012] Preferably: On one side of each of the two rings close to the gear shaft rod, a rack is fixedly connected. An outer connecting pipe is fixedly connected to the lower end of the actuator housing.

[0013] Preferably: A sealing disc is fixedly connected to the lower end of the gear shaft rod.

[0014] Preferably: Four reinforcing rods are fixedly connected to one end of the actuator housing and the outer connecting pipe close to each other. Rectangular baffles are fixedly connected to the upper ends of the two rings.

[0015] Preferably: Pressure relief grooves are provided inside each of the two rectangular baffles, and a throttle exhaust pipe is fixedly connected inside the actuator housing.

[0016] Preferably: A quick exhaust pipe is fixedly connected to one end of the actuator housing close to the throttle exhaust pipe.

[0017] (III) Beneficial effects

[0018] First, when the device is in use, the bidirectional threaded rod can be manually rotated. When the bidirectional threaded rod rotates, the threads drive the two connecting seats to slide towards the position close to the center of the actuator housing. The two connecting seats drive the rings to slide. When the connecting seats slide, the fully compressed springs assist in driving the connecting seats to slide, discharging the high-pressure gas inside the actuator housing. When a failure occurs in the pneumatic system and it cannot be closed, a manual opening operation can be performed to ensure that the valve can still be operated in an emergency and maintain the safe operation of the system, so as to improve the flexibility of the device operation. When a failure occurs in the actuator housing and it cannot be used, the bidirectional threaded rod can be manually rotated to help the maintenance personnel quickly judge the cause of the failure.

[0019] Second, when the ring slides to the middle position of the stroke, the gas in the actuator housing is quickly discharged from the quick exhaust pipe. At this time, the ring continues to slide towards the gear shaft rod more quickly. When the ring slides close to the end of the stroke, the rectangular baffle closes the quick exhaust pipe. At this time, the throttle exhaust pipe and the pressure relief groove are on the same vertical line, and the compressed air is discharged from the throttle exhaust pipe to achieve the purpose of gas buffering. Ensure that when the actuator for Class K nuclear power auxiliary system reacts quickly in 0.5 seconds, the displacement component can be effectively buffered to avoid collisions, so as to ensure the normal operation of the nuclear power valve after a large number of repeated and rapid operations. Brief Description of the Drawings

[0020] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following describes in detail with reference to the preferred embodiments of the present invention and the accompanying drawings.

[0021] Figure 1 is a three-dimensional structure diagram of the present invention;

[0022] Figure 2 is a spring connection structure diagram of the present invention;

[0023] Figure 3 is an exploded view of the gear shaft rod connection of the present invention;

[0024] Figure 4 is a connection structure diagram of the bidirectional threaded rod of the present invention.

[0025] Legend: 11, actuator housing; 12, ring; 13, spring; 14, connecting seat; 15, bidirectional threaded rod; 16, sealing ring; 17, intake pipe; 18, cover; 19, slide rail; 21, gear shaft rod; 22, rack; 23, sealing disc; 24, reinforcing rod; 25, rectangular baffle; 26, pressure relief groove; 27, throttle exhaust pipe; 28, quick exhaust pipe; 29, external connection pipe. Detailed Description of the Preferred Embodiments

[0026] In an embodiment of the present application, by providing a pneumatic buffer anti-collision actuator, the technical problem that the above-mentioned device controls the on-off of the pipeline by filling gas into the actuator, but the above-mentioned device lacks a manual control function during use. When the gas source fails and cannot be controlled to interrupt, due to the lack of a manual control function, the on-off of the pipeline cannot be controlled manually, which may cause the entire system to malfunction and affect production or other critical processes, is effectively solved. When the device is in use, the two-way threaded rod can be manually rotated. When the two-way threaded rod rotates, the threads drive the two connecting seats to slide towards the position close to the center of the actuator housing. The two connecting seats drive the ring to slide. When the connecting seats slide, the fully compressed springs assist in driving the connecting seats to slide, discharging the high-pressure gas in the actuator housing. When the pneumatic system fails and cannot be closed, a manual opening operation is performed to ensure that the valve can still be operated in an emergency and maintain the safe operation of the system, so as to improve the flexibility of device operation. When the actuator housing fails and cannot be used, manually rotating the two-way threaded rod can help maintenance personnel quickly judge the cause of the failure.

[0027] Embodiment

[0028] As Figure 1 、 Figure 2 、 Figure 3 And Figure 4 As shown in [relevant figures], the technical solution in the embodiment of the present application effectively solves the technical problem that the above-mentioned device controls the on-off of the pipeline by filling gas into the actuator, but the above-mentioned device lacks a manual control function during use. When the gas source fails and cannot be controlled to interrupt, due to the lack of a manual control function, the on-off of the pipeline cannot be controlled manually, which may cause the entire system to malfunction and affect production or other critical processes. The general idea is as follows: A pneumatic buffer anti-collision actuator includes an actuator housing 11. Two rings 12 are slidably connected inside the actuator housing 11. Springs 13 are fixedly connected to the mutually remote sides of the two rings 12. Connecting seats 14 are fixedly connected to the lower ends of the two rings 12. A two-way threaded rod 15 is rotatably connected inside the actuator housing 11. The two connecting seats 14 are both threadedly connected to the outer surface of the two-way threaded rod 15. A sealing ring 16 is sleeved on the outer surface of the two-way threaded rod 15. When the device is in use, the two-way threaded rod 15 can be manually rotated. When the two-way threaded rod 15 rotates, the threads drive the two connecting seats 14 to slide towards the position close to the center of the actuator housing 11. The two connecting seats 14 drive the rings 12 to slide. When the connecting seats 14 slide, the fully compressed springs 13 assist in driving the connecting seats 14 to slide, discharging the high-pressure gas in the actuator housing 11. When the pneumatic system fails and cannot be closed, a manual opening operation is performed to ensure that the valve can still be operated in an emergency and maintain the safe operation of the system, so as to improve the flexibility of device operation. When the actuator housing 11 fails and cannot be used, manually rotating the two-way threaded rod 15 can help maintenance personnel quickly judge the cause of the failure.

[0029] Inside the actuator housing 11, a drive mechanism is sleeved. The drive mechanism includes an intake pipe 17 which is sleeved inside the actuator housing 11. On both sides of the actuator housing 11, baffle covers 18 are fixedly connected. A sealing ring 16 is sleeved on the inner surfaces of the two baffle covers 18. On the inner surface of the actuator housing 11, two groups of slide rails 19 are fixedly connected. Two rings 12 are respectively slidably connected to the outer surfaces of the two groups of slide rails 19. Inside the actuator housing 11, a gear shaft rod 21 is rotatably connected. On one side of the two rings 12 close to the gear shaft rod 21, racks 22 are fixedly connected. Both of the two racks 22 are adapted to the gear shaft rod 21. At the lower end of the actuator housing 11, an external connection pipe 29 is fixedly connected. At the lower end of the gear shaft rod 21, a sealing disc 23 is fixedly connected. The sealing disc 23 is rotatably connected inside the external connection pipe 29. At one end where the actuator housing 11 and the external connection pipe 29 are close to each other, four reinforcing rods 24 are fixedly connected. Connect the external connection pipe 29 to the pipeline system. When the device is in use, the intake pipe 17 can be connected to an air pump, and gas can be filled into the actuator housing 11 through the intake pipe 17. The high-pressure gas squeezes and slides the two rings 12 to both sides. The two groups of slide rails 19 installed inside the actuator housing 11 limit the rings 12 and ensure the stability of the sliding. When the two rings 12 slide, the racks 22 drive the gear shaft rod 21 to rotate. The gear shaft rod 21 drives the sealing disc 23 to rotate inside the external connection pipe 29. By rotating the sealing disc 23 by 90 degrees, the internal channel of the external connection pipe 29 is opened. At this time, the rings 12 squeeze the springs 13 to contract. When the intake pipe 17 stops inflating, the two groups of springs 13 reset to drive the two rings 12 to slide towards the side close to the gear shaft rod 21 to return to the initial position. At this time, the racks 22 slide and engage with the gear shaft rod 21 to rotate and reset, and the sealing disc 23 rotates 90 degrees to reset to block the internal channel of the external connection pipe 29. Four reinforcing rods 24 are added between the actuator housing 11 and the external connection pipe 29 to ensure the stability of its installation and avoid the connection being broken due to the actuator housing 11 being knocked.

[0030] At the upper ends of both of the two rings 12, there are fixedly connected rectangular baffles 25. Inside both of the two rectangular baffles 25, there are opened pressure relief grooves 26. Inside the actuator housing 11, there is fixedly connected a throttle exhaust pipe 27. At one end of the actuator housing 11 close to the throttle exhaust pipe 27, there is fixedly connected a quick exhaust pipe 28. The throttle exhaust pipe 27 and the quick exhaust pipe 28 are respectively in contact with the two rectangular baffles 25. The quick exhaust pipe 28 is installed at the central position between the ring 12 and the gear shaft rod 21, while the throttle exhaust pipe 27 is installed at a position close to the gear shaft rod 21 and far from the ring 12. At the upper ends of both of the two rings 12, there are installed rectangular baffles 25. Inside the rectangular baffles 25, there are opened pressure relief grooves 26. The positions where the two pressure relief grooves 26 are opened are different. The pressure relief groove 26 located below the quick exhaust pipe 28 is opened at a position close to one side of the quick exhaust pipe 28, while the pressure relief groove 26 located below the throttle exhaust pipe 27 is opened at a position close to the ring 12. Both of the two rectangular baffles 25 are in contact with the throttle exhaust pipe 27 and the quick exhaust pipe 28. Through the contact of the rectangular baffles 25, the throttle exhaust pipe 27 and the quick exhaust pipe 28 are blocked. When the ring 12 slides to the middle position of the stroke, the gas inside the actuator housing 11 quickly discharges from the quick exhaust pipe 28. At this time, the ring 12 continues to slide towards the gear shaft rod 21 more quickly. When the ring 12 slides close to the end of the stroke, the rectangular baffle 25 closes the quick exhaust pipe 28. At this time, the throttle exhaust pipe 27 and the pressure relief groove 26 are on the same vertical line, and the compressed air discharges from the throttle exhaust pipe 27, achieving the purpose of gas buffering, ensuring that when the actuator for the K-class nuclear power auxiliary system rapidly responds in 0.5 seconds, the displacement component can be effectively buffered to avoid collision, so as to realize the state that the nuclear power valve can still operate normally after a large number of repeated rapid operations.

[0031] Aiming at the problems existing in the prior art, the present utility model provides an anti-collision actuator with pneumatic buffering. When the device is in use, the two-way threaded rod 15 can be manually rotated. When the two-way threaded rod 15 rotates, the threads drive the two connecting seats 14 to slide towards the central position of the actuator housing 11. The two connecting seats 14 drive the ring 12 to slide. When the connecting seats 14 slide, the fully compressed springs 13 assist in driving the connecting seats 14 to slide, discharging the high-pressure gas inside the actuator housing 11. When a failure occurs in the pneumatic system and it cannot be closed, a manual opening operation is performed to ensure that the valve can still be operated in an emergency and the safe operation of the system is maintained, so as to improve the operation flexibility of the device. When a failure occurs in the actuator housing 11 and it cannot be used, the two-way threaded rod 15 can be manually rotated to help the maintenance personnel quickly judge the cause of the failure.

[0032] Working principle:

[0033] First step, connect the external pipe 29 to the pipeline system. When the device is in use, connect the intake pipe 17 to the air pump. Gas can be filled into the actuator housing 11 through the intake pipe 17. The high-pressure gas squeezes and slides the two rings 12 to both sides. The two groups of slide rails 19 installed in the actuator housing 11 limit the rings 12 and ensure the stability of the sliding. When the two rings 12 slide, they drive the gear shaft rod 21 to rotate through the rack 22. The gear shaft rod 21 drives the sealing disc 23 to rotate in the external pipe 29. The internal channel of the external pipe 29 is opened by the 90-degree rotation of the sealing disc 23. At this time, the rings 12 squeeze the springs 13 to contract. When the intake pipe 17 stops inflating, the two groups of springs 13 reset to drive the two rings 12 to slide towards the side close to the gear shaft rod 21 to restore the initial position. At this time, the rack 22 slides and meshes with the gear shaft rod 21 to rotate and reset, and the sealing disc 23 rotates 90 degrees to reset to block the internal channel of the external pipe 29. Four reinforcing rods 24 are added between the actuator housing 11 and the external pipe 29 to ensure the stability of its installation and avoid the fracture of the connection due to the collision of the actuator housing 11.

[0034] Second step, the quick exhaust pipe 28 is installed at the central position between the ring 12 and the gear shaft rod 21, while the throttle exhaust pipe 27 is installed at a position close to the gear shaft rod 21 and far from the ring 12. Rectangular baffles 25 are installed at the upper ends of both rings 12, and pressure relief grooves 26 are respectively formed in the rectangular baffles 25. The positions where the two pressure relief grooves 26 are formed are different. The pressure relief groove 26 at the lower end of the quick exhaust pipe 28 is formed at a position close to one side of the quick exhaust pipe 28, while the pressure relief groove 26 at the lower end of the throttle exhaust pipe 27 is formed at a position close to the ring 12. Both rectangular baffles 25 are in contact with the throttle exhaust pipe 27 and the quick exhaust pipe 28. The throttle exhaust pipe 27 and the quick exhaust pipe 28 are blocked by the contact of the rectangular baffles 25. When the ring 12 slides to the middle position of the stroke, the gas in the actuator housing 11 is quickly discharged from the quick exhaust pipe 28. At this time, the ring 12 continues to slide towards the gear shaft rod 21 more quickly. When the ring 12 slides close to the end of the stroke, the rectangular baffle 25 closes the quick exhaust pipe 28. At this time, the throttle exhaust pipe 27 and the pressure relief groove 26 are on the same vertical line, and the compressed air is discharged from the throttle exhaust pipe 27, achieving the purpose of gas buffering, ensuring that when the actuator for the K-type nuclear power auxiliary system reacts quickly in 0.5 seconds, the displacement component can be effectively buffered to avoid collision, so as to ensure the normal operation of the nuclear power valve after a large number of repeated and rapid operations. When the device is in the gas charging state, the sealing disc 23 rotates to the open position. At this time, the bidirectional threaded rod 15 can be manually rotated. When the bidirectional threaded rod 15 rotates, the threads drive the two connecting seats 14 to slide towards the central position of the actuator housing 11. The two connecting seats 14 drive the ring 12 to slide. When the connecting seats 14 slide, the fully compressed spring 13 assists in driving the connecting seats 14 to slide. Rotating the bidirectional threaded rod 15 drives the rectangular baffle 25 to slide to the lower end of the quick exhaust pipe 28. At this time, the high-pressure gas in the actuator housing 11 is discharged from the quick exhaust pipe 28, and the bidirectional threaded rod 15 is manually fixed by the tool for rotating the bidirectional threaded rod 15 to temporarily fix the position of the ring 12. When the pneumatic system fails and cannot be closed, the rack 22 is manually opened to ensure that the valve can still be operated in an emergency and maintain the safe operation of the system, so as to improve the flexibility of device operation. When the actuator housing 11 fails and cannot be used, the bidirectional threaded rod 15 can be manually rotated to help the maintenance personnel quickly judge the cause of the failure (for example, if the actuator can work normally manually while there is a problem with the pneumatic control part, it can be initially judged that the failure may occur in pneumatic components such as solenoid valves and cylinders, and then targeted repairs can be carried out). The cover 18 is installed on one side of 11 to seal the inside of the actuator housing 11. The bidirectional threaded rod 15 rotates inside the cover 18, and the sealing performance of the connection of the bidirectional threaded rod 15 is ensured by the sealing ring 16 sleeved inside the cover 18. The sealing ring 16 can be disassembled and replaced by disassembling the cover 18.

[0035] Finally, it should be noted that: Obviously, the above embodiments are merely examples given to clearly illustrate the present utility model, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the present utility model.

Claims

1. A pneumatic buffer anti-collision actuator, comprising an actuator housing (11), wherein two rings (12) are slidably connected inside the actuator housing (11), characterized in that: A spring (13) is fixedly connected to one side of the two circular rings (12) that is away from each other, a connecting seat (14) is fixedly connected to the lower end of the two circular rings (12), a bidirectional threaded rod (15) is rotatably connected inside the actuator housing (11), the two connecting seats (14) are threadedly connected to the outer surface of the bidirectional threaded rod (15), and a sealing ring (16) is sleeved on the outer surface of the bidirectional threaded rod (15); Wherein, a driving mechanism is sleeved inside the actuator housing (11); The driving mechanism comprises an air intake pipe (17), and the air intake pipe (17) is sleeved inside the actuator housing (11).

2. A pneumatic buffer anti-collision actuator as claimed in claim 1, characterized in that: Both sides of the actuator housing (11) are fixedly connected with blocking covers (18); The sealing ring (16) is sleeved on the inner surfaces of the two blocking covers (18).

3. A pneumatic buffer anti-collision actuator as claimed in claim 2, characterized in that: Two sets of slide rails (19) are fixedly connected to the inner surface of the actuator housing (11), and the two rings (12) are slidably connected to the outer surfaces of the two sets of slide rails (19) respectively; The actuator housing (11) is rotatably connected to a gear shaft (21).

4. A pneumatic buffer anti-collision actuator as claimed in claim 3, characterized in that: A rack (22) is fixedly connected to one side of the two rings (12) close to the gear shaft (21), and the two racks (22) are adapted to fit the gear shaft (21); Wherein, the lower end of the actuator housing (11) is fixedly connected to an external pipe (29).

5. A pneumatic buffer anti-collision actuator as claimed in claim 4, characterized in that: A sealing disc (23) is fixedly connected to the lower end of the gear shaft (21); The sealing disc (23) is rotatably connected to the inside of the external pipe (29).

6. A pneumatic buffer anti-collision actuator as claimed in claim 5, characterized in that: Four reinforcement rods (24) are fixedly connected to one end of the actuator housing (11) and the external pipe (29) that is close to each other; Wherein, the upper ends of the two circular rings (12) are both fixedly connected with a rectangular baffle (25).

7. A pneumatic buffer anti-collision actuator as claimed in claim 6, characterized in that: The two rectangular baffles (25) are each provided with a pressure relief groove (26); Wherein, a throttle exhaust pipe (27) is fixedly connected inside the actuator housing (11).

8. A pneumatic buffer anti-collision actuator as claimed in claim 7, characterized in that: One end of the actuator housing (11) close to the throttle exhaust pipe (27) is fixedly connected to a quick exhaust pipe (28); The throttle exhaust pipe (27) and the quick exhaust pipe (28) are respectively fitted with two rectangular baffles (25).

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