High-sensitivity pneumatic actuating mechanism

Abstract

The utility model relates to the technical field of valves, in particular to a high-sensitivity pneumatic actuating mechanism which comprises a cylinder barrel, a guide rod, a push rod and a valve body, a piston is arranged in a first cavity and fixedly connected with one end of the guide rod, a hook and a gear swing rod are arranged in a second cavity, one end of the hook is connected with one end of the gear swing rod, and the other end of the hook is connected with one end of the push rod. The other end of the gear swing rod is connected with the other end of the guide rod, the other end of the push rod is connected with the valve body, and a manual button is further arranged on the second part. By means of linkage of the piston and the guide rod, reversing operation is automatically triggered when a specific pressure threshold value is reached, external intervention is not needed, reliability and efficiency of operation are enhanced, it is ensured that the reversing task can be rapidly completed after the hook and the push rod are disengaged, the execution mechanism and the valve body are designed separately, configuration is flexible and optimized, and operation is convenient. The response speed and the operation flexibility of the pneumatic actuating mechanism are improved, meanwhile, the manual button is arranged on the actuating mechanism, and the reversing function can be achieved through the manual button under the emergency condition.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a high-sensitivity pneumatic actuator. Background Art

[0002] The application of two-position three-way valves is extremely extensive, especially in systems with efficient fluid management and direction control. For example, in the manufacturing, chemical and natural gas industries, two-position three-way valves are widely used to control the flow direction of water, oil or various gases. Usually, two-position three-way valves use electromagnetic actuators or medium direct drive structures to ensure that the system can achieve the two-position three-way valve switching function when the set conditions are met. The former has a signal transmission delay problem during operation and cannot detect the action in real time; the latter has a structure that is integrated with the valve body, which has problems such as complex structure, inconvenient operation, and not conducive to modular design.

[0003] In order to solve the above problems, a highly sensitive pneumatic actuator was designed.

[0004] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0005] The utility model provides a high-sensitivity pneumatic actuator, thereby effectively solving the problems in the background technology.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a highly sensitive pneumatic actuator, comprising:

[0007] The cylinder is divided into three parts, namely, a first part, a second part and a third part, and a cavity is arranged inside the cylinder;

[0008] The first part is provided with a pressure port on the outside, and the pressure port is connected with the cavity;

[0009] The third part is configured as a two-position three-way valve, and has three ports on its outer surface, the ports are connected to the cavity, and the ports are used to connect to the system pipeline;

[0010] The first internal cavity is a first cavity, the second internal cavity is a second cavity, the third internal cavity is a third cavity, the three openings are a first opening, a second opening and a third opening, the first opening and the second opening are arranged on the same side, and the third opening is arranged on the opposite side;

[0011] A guide rod, the guide rod is arranged at the connecting passage between the first cavity and the second cavity, and both ends of the guide rod have portions extending to the first cavity and the second cavity, a piston is arranged in the first cavity, and the piston is fixedly connected to one end of the guide rod;

[0012] A push rod, the push rod is arranged in the third cavity, and one end of the push rod extends to the second cavity;

[0013] A hook and a gear swing rod are arranged in the second cavity, one end of the hook is connected to one end of the gear swing rod, and the other end is connected to one end of the push rod, the other end of the gear swing rod is connected to the other end of the guide rod, and a reversing spring is arranged on the part of the push rod located in the third cavity;

[0014] A valve body is arranged in the third chamber and is used to realize the opening and closing of the three ports, and the other end of the push rod is connected to the valve body.

[0015] Furthermore, a pressure-adjusting spring is arranged in the first chamber, one end of the pressure-adjusting spring is connected to the piston, and the other end of the pressure-adjusting spring is connected to the pressure-adjusting nut.

[0016] Furthermore, the top of the first part is configured to be open, and a cover plate is correspondingly disposed above it.

[0017] Further, a rack portion is provided on the portion of the guide rod located in the second cavity, and the rack portion is meshed with the gear rocker;

[0018] The center of the hook is fixed in the second cavity, and the center of the gear rocker is fixed in the second cavity;

[0019] Wherein, the rack part drives the gear swing rod to rotate around the center, and the gear swing rod drives the hook to rotate around the center.

[0020] Furthermore, a protrusion is fixedly provided on the top of the part of the push rod located in the second cavity, the diameter of the protrusion is larger than the diameter of the push rod, and the hook hooks the bottom end of the protrusion to drive the push rod to move in the vertical direction.

[0021] Furthermore, a manual button is provided on the second part, one end of the manual button extends into the second cavity, and the other end extends to the outside.

[0022] Furthermore, a torsion spring is arranged on the hook, and the torsion spring is used to make the hook have a tendency to rotate clockwise.

[0023] Furthermore, high-pressure gas is provided in the first chamber, and a handle is provided at the bottom end of the third part, one end of the handle is connected to the valve body, and the other end extends to the outside;

[0024] The resetting operation can be completed by exhausting the high-pressure gas and pushing the handle upward.

[0025] The beneficial effects of the utility model are as follows: through the linkage of the piston and the guide rod, the reversing operation is automatically triggered when a specific pressure threshold is reached, without the need for external intervention, thereby enhancing the reliability and efficiency of the operation. It is particularly suitable for application scenarios that require quick response and precise control of the flow direction of the fluid, and a reversing spring is used to provide force for the push rod, ensuring that the reversing task can be quickly completed after the hook is disengaged from the push rod, thereby improving the response speed and operational flexibility of the pneumatic actuator, and a manual button is also provided, which can be used to implement the reversing function in an emergency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is a schematic diagram of the internal structure of a high-sensitivity pneumatic actuator;

[0028] Figure 2 This is a schematic diagram of the external structure of a high-sensitivity pneumatic actuator;

[0029] Figure numerals: 1. Cylinder; 11. First part; 11A. Cover plate; 11B. First chamber; 11C. Pressure port; 2. Second part; 12A. Second chamber; 12B. Manual button; 13. Third part; 13A. Third chamber; 13B. Handle; 14. Cavity; 15. Through port; 15A. First port; 15B. Second port; 15C. Third port; 2. Guide rod; 21. Rack part; 3. Piston; 4. Push rod; 41. Bump; 42. Reversing spring; 5. Hook; 51. Gear rocker; 52. Torsion spring; 6. Valve body; 7. Pressure regulating spring; 71. Pressure regulating nut. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0031] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] like Figure 1 to Figure 2 As shown, a highly sensitive pneumatic actuator comprises:

[0034] The cylinder 1 is provided with three parts, namely a first part 11, a second part 2 and a third part 13, and a cavity 14 is provided inside the cylinder 1 that penetrates the whole cylinder;

[0035] The first portion 11 is provided with a pressure port 11C on the outside thereof, and the pressure port 11C is communicated with the cavity 14;

[0036] The third part 13 is configured as a two-position three-way valve, and three ports 15 are provided on the outer surface thereof, the ports 15 are communicated with the cavity 14, and the ports 15 are used to connect the system pipelines;

[0037] The inner cavity 14 of the first part 11 is a first cavity 11B, the inner cavity 14 of the second part 2 is a second cavity 12A, the inner cavity 14 of the third part 13 is a third cavity 13A, and the three through openings 15 are respectively a first opening 15A, a second opening 15B and a third opening 15C. The first opening 15A and the second opening 15B are arranged on the same side, and the third opening 15C is arranged on the other opposite side.

[0038] A guide rod 2, which is arranged at the connecting passage between the first cavity 11B and the second cavity 12A, and has portions extending to the first cavity 11B and the second cavity 12A at both ends. A piston 3 is arranged in the first cavity 11B, and the piston 3 is fixedly connected to one end of the guide rod 2;

[0039] A push rod 4, which is disposed in the third cavity 13A and has one end extending to the second cavity 12A;

[0040] The second cavity 12A is provided with a hook 5 and a gear swing rod 51, one end of the hook 5 is connected to one end of the gear swing rod 51, and the other end is connected to one end of the push rod 4, the other end of the gear swing rod 51 is connected to the other end of the guide rod 2, and a reversing spring 42 is provided on the part of the push rod 4 located in the third cavity 13A;

[0041] The valve body 6 is disposed in the third chamber 13A and is used to realize the opening and closing of the three ports 15 , and the other end of the push rod 4 is connected to the valve body 6 .

[0042] When the pressure at the pressure port 11C exceeds a preset value, the internal pressure pushes the piston 3 in the first chamber 11B upward, and the piston 3 drives the guide rod 2 to move upward through the guide rod 2 fixedly connected thereto. The movement of the guide rod 2 causes the hook 5 to disengage from the push rod 4, thereby releasing the connection between the two. As the hook 5 is separated from the push rod 4, the push rod 4 located in the third chamber 13A moves downward under the action of the reversing spring 42. The downward movement of the push rod 4 further pushes the valve body 6 to move downward, thereby connecting the second port 15B with the third port 15C, thereby realizing the reversing operation of the fluid.

[0043] Through the linkage of the piston 3 and the guide rod 2, the reversing operation is automatically triggered when a specific pressure threshold is reached without external intervention, thereby enhancing the reliability and efficiency of the operation and ensuring that the reversing task can be completed quickly after the hook 5 is disengaged from the push rod 4. The actuator and the valve body 6 are designed separately, with flexible and optimized configuration, which improves the response speed and operational flexibility of the pneumatic actuator.

[0044] In this embodiment, a pressure regulating spring 7 is disposed in the first chamber 11B. One end of the pressure regulating spring 7 is connected to the piston 3 , and the other end of the pressure regulating spring 7 is connected to the pressure regulating nut 71 .

[0045] The pressure-adjusting spring 7 is arranged in the first chamber 11B, with one end connected to the piston 3 and the other end connected to the pressure-adjusting nut 71, providing a mechanism for accurately controlling the response pressure of the piston 3. By rotating the adjusting nut, the tension of the pressure-adjusting spring 7 can be adjusted to set the accurate pressure for the piston 3 to trigger the switching. In this way, the setting of the pressure preset value can be adjusted according to different working conditions or system requirements to adapt to different operating environments. By accurately controlling the switching pressure, the internal pressure changes can be responded to more accurately, ensuring the accuracy and reliability of fluid control, thereby improving the operating efficiency and safety of the entire pneumatic actuator.

[0046] In this embodiment, the top of the first portion 11 is configured to be open, and a cover plate 11A is correspondingly disposed above.

[0047] The piston 3 and the pressure regulating spring 7 in the first chamber 11B can be easily accessed through the cover plate 11A, so that when maintenance or replacement of internal components is required, the top cover plate 11A can be quickly opened for operation, which greatly simplifies the maintenance process. The existence of the cover plate 11A also provides protection for the internal mechanical components, prevents dust, pollutants and other possible external factors from invading the chamber 14, keeps the internal mechanical components clean and intact, thereby extending the service life of the pneumatic actuator and maintaining its efficient operation.

[0048] As a preferred embodiment of the above, a rack portion 21 is provided on the portion of the guide rod 2 located in the second cavity 12A, and the rack portion 21 is meshed with the gear rocker 51;

[0049] The center of the hook 5 is fixed in the second cavity 12A, and the center of the gear rocker 51 is fixed in the second cavity 12A;

[0050] The rack portion 21 drives the gear rocker 51 to rotate around the center, and the gear rocker 51 drives the hook 5 to rotate around the center.

[0051] A part of the guide rod 2 is designed with a rack portion 21 in the second cavity 12A, and a gear rocker 51 is meshed with it. When the guide rod 2 is driven to move upward, the rack portion 21 on the guide rod 2 also moves, and the movement causes the gear rocker 51 to rotate clockwise. The bottom end of the gear rocker 51 pushes the upper end of the hook 5, causing the hook 5 to rotate counterclockwise. The rotation of the hook 5 releases its connection with the push rod 4, and then causes the push rod 4 to move downward under the action of the reversing spring 42, thereby facilitating the reversing operation.

[0052] The mechanical motion conversion achieved through the interaction of the rack portion 21, the gear rocker 51 and the hook 5 not only enhances the mechanical efficiency of the pneumatic actuator, but also ensures the smoothness and precision of the operation, and quickly and accurately disconnects or connects the internal mechanical links, thereby improving the response speed and reliability of the pneumatic actuator.

[0053] In this embodiment, a protrusion 41 is fixedly provided at the top of the push rod 4 located in the second cavity 12A. The diameter of the protrusion 41 is larger than the diameter of the push rod 4. The hook 5 hooks the bottom end of the protrusion 41 to drive the push rod 4 to move in the vertical direction.

[0054] A protrusion 41 is provided at the top of the push rod 4, and its diameter is larger than the diameter of the push rod 4 itself, so that the hook 5 can effectively hook the bottom end of the protrusion 41, simplifying the connection between the push rod 4 and the hook 5, and enhancing the stability and reliability of the connection. Since the diameter of the protrusion 41 is larger than that of the push rod 4, it provides a larger contact surface for the hook 5, reducing the swing or slippage caused by unstable connection, and ensuring the continuity and smoothness of the pneumatic actuator during operation.

[0055] In this embodiment, a manual button 12B is provided on the second portion 2, and one end of the manual button 12B extends into the second cavity 12A, and the other end extends to the outside.

[0056] The second part 2 is equipped with a manual button 12B, one end of which extends into the second cavity 12A, and the other end extends to the outside. In an emergency, the manual button 12B can be quickly pressed, and one end of the manual button 12B will hit the upper end of the hook 5, pushing the hook 5 to rotate counterclockwise, thereby realizing manual reversing, enhancing safety and flexibility, and allowing the operator to immediately intervene and make necessary adjustments or switches in the event of failure or untimely response.

[0057] In this embodiment, a torsion spring 52 is provided on the hook 5, and the torsion spring 52 is used to make the hook 5 have a tendency to rotate clockwise.

[0058] A torsion spring 52 is installed on the hook 5. On the one hand, the torsion spring 52 is used to disperse the torsion force generated by the hook 5 when it rotates, and on the other hand, it makes the hook 5 tend to rotate clockwise. When the hook 5 is connected to the push rod 4, it will not be easily disconnected due to vibration, thereby ensuring the stability of the connection, thereby improving the reliability and efficiency of the pneumatic actuator. In this way, high accuracy and stability can be maintained when performing reversing operations, reducing the possibility of failures and ensuring long-term stable operation.

[0059] In this embodiment, high-pressure gas is provided in the first chamber 11B, and a handle 13B is provided at the bottom end of the third portion 13, one end of the handle 13B is connected to the valve body 6, and the other end extends to the outside;

[0060] The resetting operation can be completed by exhausting the high-pressure gas and pushing the handle 13B upward.

[0061] The first chamber 11B is filled with high-pressure gas, and the handle 13B at the bottom of the third part 13 is connected to the valve body 6 and extends to the outside of the equipment. The design of the handle 13B allows the operator to exhaust the high-pressure gas in the first chamber 11B by pushing the handle 13B upward to complete the reset operation. The manual reset function allows the operator to intervene immediately during operation if it is necessary to quickly stop or reconfigure system parameters, quickly and safely reduce the internal pressure and reset the equipment status, which not only enhances controllability and safety, but also provides the ability to respond quickly in emergency situations, ensuring the safety of equipment and operators.

[0062] Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the description are only for explaining the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A highly sensitive pneumatic actuator, characterized in that: include: The cylinder is divided into three parts, namely, a first part, a second part and a third part, and a cavity is arranged inside the cylinder; The first part is provided with a pressure port on the outside, and the pressure port is connected with the cavity; The third part is configured as a two-position three-way valve, and has three through ports on its outer surface, the through ports are communicated with the cavity, and the through ports are used to connect the system pipeline; The first internal cavity is a first cavity, the second internal cavity is a second cavity, the third internal cavity is a third cavity, the three openings are a first opening, a second opening and a third opening, the first opening and the second opening are arranged on the same side, and the third opening is arranged on the opposite side; A guide rod, the guide rod is arranged at the connecting passage between the first cavity and the second cavity, and both ends of the guide rod have portions extending to the first cavity and the second cavity, a piston is arranged in the first cavity, and the piston is fixedly connected to one end of the guide rod; A push rod, the push rod is arranged in the third cavity, and one end of the push rod extends to the second cavity; A hook and a gear swing rod are arranged in the second cavity, one end of the hook is connected to one end of the gear swing rod, and the other end is connected to one end of the push rod, the other end of the gear swing rod is connected to the other end of the guide rod, and a reversing spring is arranged on the part of the push rod located in the third cavity; A valve body is arranged in the third chamber and is used to realize the opening and closing of the three ports, and the other end of the push rod is connected to the valve body.

2. The high-sensitivity pneumatic actuator according to claim 1, characterized in that: A pressure regulating spring is arranged in the first cavity, one end of the pressure regulating spring is connected to the piston, and the other end of the pressure regulating spring is connected to the pressure regulating nut.

3. The high-sensitivity pneumatic actuator according to claim 1, characterized in that: The top of the first part is set to be open, and a cover plate is correspondingly arranged on the top.

4. The high-sensitivity pneumatic actuator according to claim 1, characterized in that: The guide rod is provided with a rack portion on the portion located in the second cavity, and the rack portion is meshed with the gear rocker; The center of the hook is fixed in the second cavity, and the center of the gear rocker is fixed in the second cavity; Wherein, the rack part drives the gear swing rod to rotate around the center, and the gear swing rod drives the hook to rotate around the center.

5. The high-sensitivity pneumatic actuator according to claim 1, characterized in that: A protrusion is fixedly arranged at the top of the part of the push rod located in the second cavity, the diameter of the protrusion is larger than the diameter of the push rod, and the hook hooks the bottom end of the protrusion to drive the push rod to move in the vertical direction.

6. The high-sensitivity pneumatic actuator according to claim 1, characterized in that: The second part is provided with a manual button, one end of the manual button extends into the second cavity, and the other end extends to the outside.

7. The high-sensitivity pneumatic actuator according to claim 6, characterized in that: The hook is provided with a torsion spring, and the torsion spring is used to make the hook have a clockwise rotation tendency.

8. The high-sensitivity pneumatic actuator according to claim 2, characterized in that: The first chamber is provided with high-pressure gas, the bottom end of the third part is provided with a handle, one end of the handle is connected to the valve body, and the other end extends to the outside; The resetting operation can be completed by exhausting the high-pressure gas and pushing the handle upward.

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