Self-locking device for a pneumatic actuator

Abstract

The application relates to the technical field of pneumatic actuators, and discloses a self-locking device of a pneumatic actuator, which comprises a cylinder body, a plurality of connecting columns are fixedly connected to the outer wall of the bottom of the cylinder body, the bottom ends of the plurality of connecting columns are fixedly connected to a same valve body, a position-avoiding hole is arranged at the top of the valve body, a threaded rod is arranged in the cylinder body, a valve is rotationally connected to the valve body through the threaded rod and the position-avoiding hole, a partition plate is fixedly connected in the cylinder body and the threaded rod penetrates through the partition plate, a turbine is rotationally connected to the upper surface of the partition plate, and the threaded rod is in threaded connection with the turbine. The self-locking device can keep the valve body open under the condition that no air is supplied, energy is saved, the position of the threaded rod can be fixedly assisted, the stability of the self-locking device is improved, the position of the turbine can be fixed in time, the turbine can be prevented from being reversed, the use of the self-locking device is affected, the use effect of the self-locking device is improved, and the like.

Description

Technical Field

[0001] This invention relates to the field of pneumatic actuator technology, specifically to a self-locking device for a pneumatic actuator. Background Technology

[0002] A pneumatic actuator is an actuator that is driven by air pressure. It is usually equipped with auxiliary devices to facilitate better use of the pneumatic actuator.

[0003] A search revealed a pneumatic actuator with publication number CN219102171U. This actuator uses a double piston to increase the pressure-bearing area during opening, thereby increasing the opening force. As the opening force increases, the corresponding sealing force can also increase. However, it requires continuous airflow after opening to keep the valve body open, and lacks a self-locking mechanism, resulting in high energy consumption. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a self-locking device for pneumatic actuators, primarily to solve the problem that the valve body of a pneumatic actuator needs to be continuously ventilated to remain open.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A self-locking device for a pneumatic actuator includes a cylinder body. Multiple connecting posts are fixedly connected to the bottom outer wall of the cylinder body. The bottom ends of the multiple connecting posts are fixedly connected to the same valve body. A clearance hole is provided on the top of the valve body. A threaded rod is provided inside the cylinder body. One end of the threaded rod passes through the cylinder body and the clearance hole, extends into the valve body, and is rotatably connected to a valve. A partition is fixedly connected inside the cylinder body, and the threaded rod passes through the partition. A turbine is rotatably connected to the upper surface of the partition, and the threaded rod is threadedly connected to the turbine. Multiple sliding grooves are provided on the outer side of the cylinder body. Each groove has a sliding rod slidably connected to it, and a connecting plate is fixedly connected to the top of the sliding rod. The top of the threaded rod passes through the cylinder body and is rotatably connected to the connecting plate. A fixing ring is fixedly connected to the outside of the cylinder body, and multiple rubber blocks are fixedly connected inside the fixing ring. The same sliding ring is slidably connected to multiple sliding grooves, and the sliding ring is fixed to the sliding rod. Multiple elastic plates are fixedly connected to the upper surface of the sliding ring. Friction plates are fixedly connected to the outer walls of multiple sides of the cylinder body. A sealing mechanism is provided in the clearance hole. A fixing mechanism for auxiliary fixing of the turbine is provided on the upper surface of the partition plate.

[0009] Furthermore, the sealing mechanism includes two sealing rings, and the inner wall of the clearance hole has two placement grooves, in which the two sealing rings are respectively fixed.

[0010] Based on the aforementioned scheme, the fixing mechanism includes two sliding columns, and two sliding holes are opened on the upper surface of the partition. The two sliding columns are slidably connected to the two sliding holes respectively. A spring is fixedly connected to the bottom of each of the two sliding columns, and the spring is fixed to the sliding hole. Multiple arc-shaped grooves are opened at the bottom of the turbine, and the sliding column is engaged with the arc-shaped groove.

[0011] As a further embodiment of the present invention, an installation groove is provided on the outer side of the valve, and a sealing ring is fixedly connected in the installation groove.

[0012] Furthermore, two connectors are fixedly connected to the top of the cylinder body, and the connectors are in communication with the cylinder body.

[0013] Based on the aforementioned scheme, two vent holes are opened at the bottom of the cylinder, and scales are provided on multiple outer walls of the cylinder.

[0014] As a further embodiment of the present invention, flanges are fixedly connected to both ends of the valve body, and a sealing gasket is fixedly connected to one side of the flange.

[0015] Furthermore, a plurality of fixing blocks are fixedly connected to one side of the flange, and the fixing blocks are fixed to the valve body.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, the present invention provides a self-locking device for a pneumatic actuator, which has the following features:

[0018] Beneficial effects:

[0019] 1. By using the turbine and threaded rod together, the turbine will rotate when air is supplied. During the rotation of the turbine, the threaded rod will move upward, and the threaded rod will move the valve, thereby opening the valve body. At this time, the position of the valve will be fixed by the threaded engagement of the turbine and the threaded rod, so that the valve body can be kept open even when air is not supplied, thus saving energy.

[0020] 2. Through the combined use of the friction plate and the rubber block, the threaded rod will drive the connecting plate to move during its movement. The connecting plate will drive the sliding rod to move, and the sliding rod will drive the slip ring to move. When the threaded rod stops moving, the rubber block will increase the friction force of the sliding rod, and the contact between the friction plate and the elastic plate will increase the friction force of the slip ring. This can help fix the position of the threaded rod and improve the stability of the self-locking device.

[0021] 3. Through the setting of the sealing mechanism, the sealing mechanism can seal the gap between the relief hole and the threaded rod, thereby preventing air leakage in the valve body and improving the overall sealing performance of the actuator.

[0022] 4. By setting up a fixing mechanism, the position of the turbine can be fixed in time, thereby preventing the turbine from reversing and affecting the use of the self-locking device, thus improving the effectiveness of the self-locking device. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of a self-locking device for a pneumatic actuator proposed in this invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of the valve body of a self-locking device for a pneumatic actuator proposed in this invention;

[0025] Figure 3 This is a schematic diagram of the internal structure of the cylinder of a self-locking device for a pneumatic actuator proposed in this invention;

[0026] Figure 4 This is a partial cross-sectional view of the self-locking device of a pneumatic actuator proposed in this invention;

[0027] Figure 5 This is an enlarged schematic diagram of the rubber block structure of the self-locking device of a pneumatic actuator proposed in this invention;

[0028] Figure 6 This is an enlarged structural diagram of part A of the self-locking device of a pneumatic actuator proposed in this invention.

[0029] In the diagram: 1. Cylinder block; 2. Friction plate; 3. Scale; 4. Sliding rod; 5. Slip ring; 6. Valve body; 7. Fixing block; 8. Flange; 9. Sealing gasket; 10. Connecting column; 11. Elastic plate; 12. Fixing ring; 13. Threaded rod; 14. Connecting plate; 15. Vent hole; 16. Sealing ring; 17. Valve; 18. Mounting groove; 19. Connector; 20. Turbine; 21. Partition plate; 22. Arc groove; 23. Sliding column; 24. Sliding hole; 25. Spring; 26. Rubber block; 27. Sliding groove; 28. Alternating hole; 29. ​​Placement groove; 30. Sealing ring. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Reference Figures 1-6A self-locking device for a pneumatic actuator includes a cylinder body 1. Multiple connecting posts 10 are welded to the bottom outer wall of the cylinder body 1. A valve body 6 is welded to the bottom end of each connecting post 10. A clearance hole 28 is provided at the top of the valve body 6. A threaded rod 13 is provided inside the cylinder body 1. One end of the threaded rod 13 passes through the cylinder body 1 and the clearance hole 28, extending into the valve body 6 and rotatably connected to a valve 17. A partition plate 21 is fixed inside the cylinder body 1 by bolts, and the threaded rod 13 passes through the partition plate 21. A turbine 20 is rotatably connected to the upper surface of the partition plate 21, and the threaded rod 13 is threadedly connected to the turbine 20. The outer side of the cylinder body 1... Multiple sliding grooves 27 are provided, and sliding rods 4 are slidably connected within each of the multiple sliding grooves 27. A connecting plate 14 is welded to the top of the sliding rod 4, and the top of the threaded rod 13 passes through the cylinder body 1 and is rotatably connected to the connecting plate 14. A fixing ring 12 is fixed to the outside of the cylinder body 1 by bolts. Multiple rubber blocks 26 are adhered inside the fixing ring 12, and the rubber blocks 26 are in contact with the sliding rod 4. The same sliding ring 5 is slidably connected within the multiple sliding grooves 27, and the sliding ring 5 is fixed to the sliding rod 4. Multiple elastic plates 11 are welded to the upper surface of the sliding ring 5. Friction plates 2 are fixed to the outer walls of multiple sides of the cylinder body 1 by bolts, and the elastic plates 11 are also fixed to the outer walls of the cylinder body 1. When the turbine 20 contacts the friction plate 2, air is supplied to the cylinder 1. The airflow entering the cylinder 1 drives the turbine 20 to rotate. Since the turbine 20 and the threaded rod 13 are threadedly connected, the rotation of the turbine 20 causes the threaded rod 13 to move upwards. The threaded rod 13 then moves the valve 17 upwards, opening the valve body 6. With the turbine 20 and the threaded rod 13 engaged, the position of the valve 17 can be fixed even when no air is supplied to the cylinder 1, thus allowing the valve body 6 to remain open even without air supply, saving energy. During the movement of threaded rod 13, the connecting plate 14 will move, the connecting plate 14 will move the sliding rod 4, and the sliding rod 4 will move the slip ring 5. When the cylinder body 1 is no longer ventilated and the threaded rod 13 stops moving, the rubber block 26 will increase the friction of the sliding rod 4. At the same time, the contact between the elastic plate 11 and the friction plate 2 will increase the friction of the slip ring 5, thereby assisting in fixing the position of the threaded rod 13 and improving the stability of the self-locking device. A sealing mechanism is provided in the clearance hole 28, and a fixing mechanism for assisting in fixing the turbine 20 is provided on the upper surface of the partition plate 21.

[0032] In particular, the sealing mechanism of this invention includes two sealing rings 30. Two placement grooves 29 are formed on the inner wall of the clearance hole 28. The two sealing rings 30 are respectively fixed in the two placement grooves 29. Both sealing rings 30 are in contact with the threaded rod 13. The sealing rings 30 can seal the threaded rod 13 and the clearance hole 28. The fixing mechanism includes two sliding pillars 23. Two sliding holes 24 are formed on the upper surface of the partition plate 21. The two sliding pillars 23 are slidably connected to the two sliding holes 24 respectively. Springs 25 are welded to the bottom of each of the two sliding pillars 23, and the springs 25 are fixed to the sliding holes 24. Multiple arc-shaped grooves 22 are formed at the bottom of the turbine 20, and the sliding pillars 23 are engaged with the arc-shaped grooves 22. During the rotation of the turbine 20, the sliding pillars 23 are squeezed into the sliding holes 24, and the sliding pillars 23 squeeze the springs 25. When the turbine 20 rotates to the point where the sliding pillar 23 aligns with the next arc-shaped groove 22... The sliding column 23 will enter the next arc-shaped groove 22 under the force of the spring 25, and so on, until the cylinder 1 is no longer ventilated and the turbine 20 is no longer fixed. At this time, the position of the turbine 20 can be fixed in time by the engagement of the sliding column 23 and the arc-shaped groove 22, so as to prevent the turbine 20 from reversing and affecting the use of the self-locking device, thus improving the use effect of the self-locking device. The valve 17 has an installation groove 18 on the outside, and a sealing ring 16 is bonded in the installation groove 18. Two connectors 19 are welded to the top of the cylinder 1 and are connected to the cylinder 1. Two vent holes 15 are opened at the bottom of the cylinder 1. The cylinder 1 has scale gauges 3 on multiple outer walls. Flanges 8 are welded to both ends of the valve body 6. A sealing gasket 9 is bonded to one side of the flange 8. Multiple fixing blocks 7 are welded to one side of the flange 8 and are fixed to the valve body 6.

[0033] The working principle of this embodiment is as follows: During use, air is supplied to the cylinder 1. The airflow entering the cylinder 1 drives the turbine 20 to rotate. Since the turbine 20 and the threaded rod 13 are threadedly connected, the rotation of the turbine 20 causes the threaded rod 13 to move upward. The threaded rod 13 then drives the valve 17 to move upward, thereby opening the valve body 6. With the turbine 20 and the threaded rod 13 threadedly engaged, the position of the valve 17 can be fixed even when no more air is supplied to the cylinder 1, thus keeping the valve body 6 open even without air supply, saving energy. During the movement of the threaded rod 13, the connecting plate 14 moves, which in turn moves the sliding rod 4, which in turn moves the slip ring 5. When no more air is supplied to the cylinder 1 and the threaded rod 13 stops moving, the rubber block 26 will increase... The friction force of the sliding rod 4 is increased, and the contact between the elastic plate 11 and the friction plate 2 increases the friction force of the slip ring 5, which can help fix the position of the threaded rod 13, improving the stability of the self-locking device. During the rotation of the turbine 20, the sliding column 23 is squeezed into the sliding hole 24, and the sliding column 23 squeezes the spring 25. When the turbine 20 rotates to the point where the sliding column 23 is aligned with the next arc groove 22, the sliding column 23 will enter the next arc groove 22 through the force of the spring 25. This cycle continues until the cylinder block 1 is no longer vented and the turbine 20 is no longer fixed. At this time, the position of the turbine 20 can be fixed in time by the engagement of the sliding column 23 and the arc groove 22, which can prevent the turbine 20 from reversing and affecting the use of the self-locking device, thus improving the use effect of the self-locking device.

[0034] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0035] In the description herein, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A self-locking device for a pneumatic actuator, comprising a cylinder (1), characterized in that, Multiple connecting columns (10) are fixedly connected to the bottom outer wall of the cylinder (1). The bottom ends of the multiple connecting columns (10) are fixedly connected to the same valve body (6). A clearance hole (28) is opened on the top of the valve body (6). A threaded rod (13) is provided inside the cylinder (1). One end of the threaded rod (13) passes through the cylinder (1) and the clearance hole (28) and extends into the valve body (6) to be rotatably connected to a valve (17). A partition plate (21) is fixedly connected inside the cylinder (1), and the threaded rod (13) passes through the partition plate (21). A turbine (20) is rotatably connected to the upper surface of the partition plate (21), and the threaded rod (13) is threadedly connected to the turbine (20). Multiple sliding grooves (27) are opened on the outer side of the cylinder (1). All are slidably connected with a slide rod (4), and the top of the slide rod (4) is fixedly connected with a connecting plate (14). The top of the threaded rod (13) passes through the cylinder body (1) and is rotatably connected to the connecting plate (14). The outer side of the cylinder body (1) is fixedly connected with a fixing ring (12). Multiple rubber blocks (26) are fixedly connected inside the fixing ring (12). The same sliding ring (5) is slidably connected inside multiple sliding grooves (27). The sliding ring (5) is fixed to the slide rod (4). Multiple elastic plates (11) are fixedly connected to the upper surface of the sliding ring (5). Friction plates (2) are fixedly connected to the outer walls of multiple sides of the cylinder body (1). A sealing mechanism is provided inside the clearance hole (28). A fixing mechanism for auxiliary fixing of the turbine (20) is provided on the upper surface of the partition plate (21). The sealing mechanism includes two sealing rings (30), and the inner wall of the clearance hole (28) is provided with two placement grooves (29), and the two sealing rings (30) are respectively fixed in the two placement grooves (29); The fixing mechanism includes two sliding columns (23), and two sliding holes (24) are opened on the upper surface of the partition (21). The two sliding columns (23) are slidably connected to the two sliding holes (24) respectively. A spring (25) is fixedly connected to the bottom of each of the two sliding columns (23), and the spring (25) is fixed to the sliding hole (24). The bottom of the turbine (20) is provided with multiple arc-shaped grooves (22), and the sliding column (23) is engaged with the arc-shaped groove (22).

2. The self-locking device for a pneumatic actuator according to claim 1, characterized in that, The valve (17) has an installation groove (18) on its outer side, and a sealing ring (16) is fixedly connected inside the installation groove (18).

3. The self-locking device for a pneumatic actuator according to claim 1, characterized in that, The top of the cylinder (1) is fixedly connected to two connectors (19), and the connectors (19) are connected to the cylinder (1).

4. The self-locking device for a pneumatic actuator according to claim 3, characterized in that, The bottom of the cylinder (1) has two vent holes (15), and the outer walls of the cylinder (1) on multiple sides are provided with scales (3).

5. The self-locking device for a pneumatic actuator according to claim 1, characterized in that, Both ends of the valve body (6) are fixedly connected to flanges (8), and a sealing gasket (9) is fixedly connected to one side of the flange (8).

6. The self-locking device for a pneumatic actuator according to claim 5, characterized in that, A plurality of fixing blocks (7) are fixedly connected to one side of the flange (8), and the fixing blocks (7) are fixed to the valve body (6).

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