Pneumatic actuator
By designing a structure that can adjust the spring potential energy in the pneumatic actuator, the problem that the spring extrusion degree cannot be adjusted according to the air pressure in the prior art, and the effect of piston movement and protection of the rotor under different air pressures is achieved.
Patent Information
- Application Number
- CN202420504948.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-14
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-03-14
AI Technical Summary
Existing pneumatic actuators cannot adjust the degree of spring squeezing according to actual conditions, resulting in less practicality in pushing the piston to move under different air pressures.
A pneumatic actuator including a casing, axle rod, gear, movable plate, piston disk, telescopic rod and spring is designed. The screw drives the rotation of the screw through the turntable, and the screw drives the movement of the moving disk, adjusts the spring potential energy, and realizes that the piston disk is at different air pressures. movement in case.
The flexible movement of the piston disk is achieved under different air pressures, which improves the flexibility of the actuator, and prevents damage to the rotor in unexpected situations through a protective cover.
Smart Images
Figure CN222163750U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of actuators, in particular to a pneumatic actuator. Background Art
[0002] Pneumatic actuators are actuators that use air pressure to open, close or adjust valves. They are also called pneumatic actuators or pneumatic devices, but they are generally called pneumatic heads. Pneumatic actuators are sometimes equipped with certain auxiliary devices. Commonly used are valve positioners and handwheel mechanisms. The function of the valve positioner is to use the feedback principle to improve the performance of the actuator so that the actuator can achieve accurate positioning according to the control signal of the controller. The function of the handwheel mechanism is to use it to directly manipulate the control valve to maintain normal production when the control system fails due to power outages, gas outages, no output of the controller or failure of the actuator.
[0003] The potential energy of the spring inside the existing pneumatic actuator is usually constant, so the extrusion degree of the control spring cannot be adjusted according to actual conditions, and the left and right pistons cannot be pushed to move under different air pressures, which has low practicality. Utility Model Content
[0004] The utility model mainly provides a pneumatic actuator which can adjust the extrusion degree of a control spring according to actual conditions.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a pneumatic actuator, comprising: a casing, a shaft is provided at the inner center of the casing, both ends of the shaft penetrate the top and bottom of the casing and are rotatably connected with the bearings thereof, a movable plate is provided inside the casing and on both sides of the shaft, a side wall of the movable plate is provided with tooth grooves at equal intervals, a gear is sleeved and fixedly connected to the surface of the shaft, the gear and the tooth groove are meshed and connected with each other, a piston disk is fixed to one end of the movable plate, a mounting cover is provided at both ends of the casing, a circular cavity is provided inside the mounting cover, a circular hole is symmetrically provided on the inner wall of one end of the circular cavity, a telescopic rod is provided inside the circular hole, a spring is sleeved on the surface of the telescopic rod, a movable disk is provided inside the circular cavity, the two ends of the telescopic rod and the spring are fixedly connected to the piston disk and the movable disk respectively, a screw is penetrated and threadedly connected at the center of the movable disk, a rotating piece is fixed to the top of the shaft, and a protective cover is sleeved and installed at the top of the casing and located at the rotating piece.
[0006] Preferably, a first sealing ring disk is embedded in and fixed to the arc wall of the piston disk, and the outer arc wall of the first sealing ring disk is in contact with the inner wall of the casing. Through the above arrangement, the first sealing ring disk can improve the sealing effect between the piston disk and the inner wall of the casing.
[0007] Preferably, mounting plates are fixed at equal intervals on the surface of the mounting cover, and mounting holes are provided on the surfaces of the mounting plates. Through the above arrangement, the mounting cover can be mounted to both ends of the casing.
[0008] Preferably, one end of the screw is rotatably connected to a bearing on the inner wall of one end of the circular cavity, and the other end of the screw passes through the inner wall of the other end of the circular cavity and is rotatably connected to its bearing. A turntable is fixed to one end of the screw. Through the above arrangement, the rotation of the turntable drives the screw to rotate, and the rotation of the screw drives the movable disk to move.
[0009] Preferably, the arc edges of the movable disk are symmetrically provided with limiting grooves, the limiting grooves are embedded and slidably connected with limiting plates, and the limiting plates are fixedly connected to the inner wall of the circular cavity. Through the above arrangement, the limiting plates can limit the movable disk.
[0010] Preferably, a fixing ring disk is fixedly connected inside the casing and near both ends, and a second sealing ring disk is fixed at one end of the mounting cover, and the second sealing ring disk is tightly attached to the fixing ring disk. Through the above arrangement, the sealing effect between the mounting cover and both ends of the casing can be improved.
[0011] Compared with the prior art, the advantages and positive effects of the utility model are:
[0012] 1. In the utility model, the screw is driven to rotate by the rotation of the turntable, and the screw is driven to move the movable disk. The movement of the movable disk can adjust the spring potential energy, which can adjust the movable disk to push the piston disk to move under different air pressure conditions, so that the actuator can be used in different conditions.
[0013] 2. In the present invention, a protective cover is installed on the top of the casing to protect the rotating parts, thereby preventing the rotating parts from being rotated or damaged under unexpected circumstances. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 The utility model provides a three-dimensional diagram of the overall structure of a pneumatic actuator;
[0015] Figure 2 The utility model provides a cross-sectional view of the overall structure of a pneumatic actuator;
[0016] Figure 3 A partial structural stereogram of a pneumatic actuator is provided for the utility model;
[0017] Figure 4 The utility model provides a cross-sectional view of a mounting cover structure of a pneumatic actuator.
[0018] Legend: 1. Casing; 2. Shaft; 3. Gear; 4. Moving plate; 5. Tooth groove; 6. Piston disc; 7. First sealing ring disc; 8. Mounting cover; 9. Mounting plate; 10. Mounting hole; 11. Circular cavity; 12. Circular hole; 13. Telescopic rod; 14. Spring; 15. Moving disc; 16. Screw; 17. Turntable; 18. Limiting groove; 19. Limiting plate; 20. Fixed ring disc; 21. Second sealing ring disc; 22. Rotating part; 23. Protective cover. DETAILED DESCRIPTION
[0019] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.
[0020] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.
[0021] See also Figure 1-Figure 4 The utility model provides a technical solution: a pneumatic actuator, comprising: a casing 1, a shaft 2 is arranged at the inner center of the casing 1, both ends of the shaft 2 penetrate the top and bottom of the casing 1 and are rotatably connected with the bearings, a movable plate 4 is arranged inside the casing 1 and on both sides of the shaft 2, a side wall of the movable plate 4 is evenly spaced with tooth grooves 5, a gear 3 is sleeved and fixedly connected to the surface of the shaft 2, the gear 3 and the tooth groove 5 are meshed and connected with each other, a piston disk 6 is fixed to one end of the movable plate 4, and a mounting cover 8 is arranged at both ends of the casing 1. A circular cavity 11 is provided inside the cover 8, and a circular hole 12 is symmetrically provided on the inner wall of one end of the circular cavity 11. A telescopic rod 13 is provided inside the circular hole 12, and a spring 14 is sleeved on the surface of the telescopic rod 13. A movable disk 15 is provided inside the circular cavity 11. The two ends of the telescopic rod 13 and the spring 14 are respectively fixedly connected to the piston disk 6 and the movable disk 15. A screw 16 passes through and is threadedly connected to the center of the movable disk 15. A rotating piece 22 is fixed to the top of the shaft 2, and a protective cover 23 is sleeved and installed on the top of the casing 1 and located at the rotating piece 22.
[0022] like Figure 2 As shown, the arc wall of the piston disc 6 is embedded and fixed with a first sealing ring disc 7, and the outer arc wall of the first sealing ring disc 7 is in contact with the inner wall of the casing 1. Through the above arrangement, the first sealing ring disc 7 can improve the sealing effect between the piston disc 6 and the inner wall of the casing 1.
[0023] like Figure 1As shown, mounting plates 9 are fixed at equal intervals on the surface of the mounting cover 8, and mounting holes 10 are opened on the surface of the mounting plates 9. Through the above arrangement, the mounting cover 8 can be installed on both ends of the casing 1.
[0024] like Figure 2 As shown, one end of the screw 16 is rotatably connected to the bearing on the inner wall of one end of the circular cavity 11, and the other end of the screw 16 passes through the inner wall of the other end of the circular cavity 11 and is rotatably connected to its bearing. A turntable 17 is fixed to one end of the screw 16. Through the above arrangement, the rotation of the turntable 17 can drive the screw 16 to rotate, and the rotation of the screw 16 can drive the movable disk 15 to move.
[0025] like Figure 3 and Figure 4 As shown, the arc edges of the movable disk 15 are symmetrically provided with limiting grooves 18, and the limiting plates 19 are embedded and slidably connected inside the limiting grooves 18. The limiting plates 19 are fixedly connected to the inner wall of the circular cavity 11. Through the above arrangement, the limiting plates 19 can limit the movable disk 15.
[0026] like Figure 2 and Figure 4 As shown, a fixing ring disk 20 is fixedly connected inside the casing 1 and near both ends, and a second sealing ring disk 21 is fixed at one end of the mounting cover 8. The second sealing ring disk 21 is tightly attached to the fixing ring disk 20. Through the above arrangement, the sealing effect of the mounting cover 8 and both ends of the casing 1 can be improved.
[0027] The use method and working principle of this device are as follows: the screw 16 is driven to rotate by rotating the turntable 17, and the screw 16 is driven to move the movable plate 15 by rotating. The movement of the movable plate 15 can adjust the potential energy of the spring 14, and can adjust the movable plate 15 to push the piston plate 6 to move under different air pressure conditions, so that the actuator can be used in different situations. By opening the protective cover 23, it is convenient to manually rotate the rotating part 22. At the same time, covering the protective cover 23 can protect the rotating part 22, so as to prevent the rotating part 22 from being rotated or damaged under unexpected circumstances.
[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.
Claims
1. A pneumatic actuator, characterized in that: include: A casing (1), wherein a shaft (2) is provided at the center of the interior of the casing (1), both ends of the shaft (2) penetrate the top and bottom of the casing (1) and are rotatably connected to the bearings thereof, a movable plate (4) is provided inside the casing (1) and on both sides of the shaft (2), a side wall of the movable plate (4) is provided with tooth grooves (5) at even intervals, a gear (3) is sleeved on the surface of the shaft (2) and fixedly connected, the gear (3) and the tooth groove (5) are meshedly connected, a piston disk (6) is fixed at one end of the movable plate (4), and mounting covers (8) are provided at both ends of the casing (1), and a circular cavity ( 11), a circular hole (12) is symmetrically opened on the inner wall of one end of the circular cavity (11), a telescopic rod (13) is arranged inside the circular hole (12), a spring (14) is sleeved on the surface of the telescopic rod (13), a movable disk (15) is arranged inside the circular cavity (11), the two ends of the telescopic rod (13) and the spring (14) are respectively fixedly connected to the piston disk (6) and the movable disk (15), a screw (16) passes through the center of the movable disk (15) and is threadedly connected, a rotating part (22) is fixed on the top of the shaft rod (2), and a protective cover (23) is sleeved and installed on the top of the housing (1) and located at the rotating part (22).
2. A pneumatic actuator according to claim 1, characterized in that: A first sealing ring disc (7) is embedded in and fixed to the arc wall of the piston disc (6), and the outer arc wall of the first sealing ring disc (7) is in contact with the inner wall of the casing (1).
3. A pneumatic actuator according to claim 1, characterized in that: Mounting plates (9) are fixed at equal intervals on the surface of the mounting cover (8), and mounting holes (10) are provided on the surface of the mounting plates (9).
4. A pneumatic actuator according to claim 1, characterized in that: One end of the screw rod (16) is rotatably connected to a bearing on the inner wall of one end of the circular cavity (11), and the other end of the screw rod (16) passes through the inner wall of the other end of the circular cavity (11) and is rotatably connected to its bearing. A rotating disk (17) is fixed to one end of the screw rod (16).
5. A pneumatic actuator according to claim 1, characterized in that: The arc edges of the movable disk (15) are symmetrically provided with limiting grooves (18), the limiting grooves (18) are embedded in and slidably connected with limiting plates (19), and the limiting plates (19) are fixedly connected to the inner wall of the circular cavity (11).
6. A pneumatic actuator according to claim 1, characterized in that: A fixing ring disk (20) is fixedly connected inside the housing (1) and near both ends, and a second sealing ring disk (21) is fixed to one end of the mounting cover (8), and the second sealing ring disk (21) is tightly attached to the fixing ring disk (20).