A pneumatically operated valve with manual stepless adjustment

Abstract

The utility model discloses an embodiment provides a kind of pneumatic valve of being convenient to manual stepless regulation, it is related to pneumatic valve technical field.It includes shell, and shell is fixedly provided with support frame, and support frame is fixedly provided with connecting lug, and multiple stage air cylinder is hinged on connecting lug, and the output end of multiple stage air cylinder is provided with connecting assembly, the inside of shell is provided with movable plate for adjusting flow, and rotating shaft is fixedly provided on movable plate, and multiple stage air cylinder is driven rotating shaft rotation by the connecting assembly, and then movable plate is driven to rotate, the outside of shell is provided with manual regulating mechanism, and manual regulating mechanism is used for manually controlling movable plate rotation.The pneumatic valve of being convenient to manual stepless regulation by integrating pneumatic and manual double stepless regulation function, effectively solve the control failure problem when unexpected power failure or fault.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic valve technology, and in particular to a pneumatic valve that is easy to manually steplessly adjust. Background Technology

[0002] As a key actuator in industrial automation systems, pneumatic valves are widely used in fluid control processes in fields such as petrochemicals, power, metallurgy, and water treatment. They achieve rapid opening and closing or flow regulation by driving the valve core, and have advantages such as fast response speed, good explosion-proof performance, and suitability for harsh environments.

[0003] Traditional pneumatic valves mostly use cylinders or diaphragm actuators, and control the air supply through solenoid valves to achieve binary switching control of the valve. However, in the event of an unexpected power outage such as a factory power failure, control system failure, or damage to the actuator, the electric valve will immediately lose all its regulating functions and become inoperable. This will not only interrupt the production process, but may also cause safety risks or lead to huge production losses in some critical process pipelines, such as systems that require continuous cooling or supply.

[0004] Therefore, in order to address the above problems, the applicant needs to design a pneumatic valve that is easy to manually adjust steplessly to solve the problem. Utility Model Content

[0005] This application provides a pneumatic valve that is easy to manually steplessly adjust, including a housing, and a support frame is fixedly mounted on the housing. A connecting lug is fixedly mounted on the support frame, and a multi-stage cylinder is hinged to the connecting lug. A connecting assembly is provided at the output end of the multi-stage cylinder. A movable plate for adjusting the flow rate is provided on the inner side of the housing, and a rotating shaft is fixedly mounted on the movable plate. The multi-stage cylinder drives the rotating shaft to rotate through the connecting assembly, thereby driving the movable plate to rotate. A manual adjustment mechanism is provided on the outer side of the housing, and the manual adjustment mechanism is used to manually control the rotation of the movable plate.

[0006] Preferably, the connecting assembly includes a connecting rod fixedly connected to the telescopic end of the multi-stage cylinder, and a clamping frame is fixedly provided at the end of the connecting rod away from the multi-stage cylinder. A sliding rod is fixedly provided on the clamping frame, and a rotating plate is rotatably provided on the sliding rod. A linkage rod is provided on the inner side of the rotating plate, and the linkage rod is fixedly connected to the rotating shaft, which improves the stability of power transmission and adaptability to different installation positions.

[0007] Preferably, the inner side of the rotating plate is provided with ratchet teeth, and the outer side of the linkage rod is provided with pawl teeth, and the pawl teeth mesh with the ratchet teeth. The meshing design of the ratchet and pawl effectively prevents the actuator from reverse transmission and enhances the reliability of valve positioning.

[0008] Preferably, the manual adjustment mechanism includes a fixed rod fixedly connected to the movable plate, and one end of the fixed rod extends to the outside of the housing and is fixedly connected to a connecting frame. A handle wheel is fixedly installed on the connecting frame, and the handle wheel is used to drive the connecting frame to rotate. The external handle wheel can directly drive the valve core to rotate, so as to realize the manual stepless adjustment function when the pneumatic system fails.

[0009] Preferably, a mechanical seal is rotatably provided on the outer side of the fixed rod, and the mechanical seal is fixedly connected to the outer shell. The mechanical seal structure ensures the sealing of the valve stem where it passes through the outer shell, preventing media leakage.

[0010] Preferably, the handle wheel is provided with a dial for indicating the rotation angle of the movable plate. The dial design makes it easy to read the valve opening intuitively, improving the accuracy of manual adjustment and the convenience of operation.

[0011] Preferably, a graphite ring is provided on the outer side of the rotating shaft, and a sealing shell is fixedly provided on the outer side of the graphite ring. The sealing shell is fixedly connected to the outer shell. The graphite ring and the sealing shell provide a high-temperature resistant self-lubricating seal, reducing shaft rotation friction and extending the seal life.

[0012] Preferably, a sealing ring is provided between the rotating shaft and the sealing shell, and the sealing ring is made of polytetrafluoroethylene (PTFE). The PTFE sealing ring further enhances the corrosion resistance and stability of the shaft end seal.

[0013] This utility model provides a pneumatic valve that is easy to manually steplessly adjust, compared with the prior art: This pneumatic valve, which allows for easy manual stepless adjustment, features a ratchet and pawl engagement structure in its connection components. This enables reliable unidirectional transmission during pneumatic actuation and overrunning clutch operation during manual operation, ensuring stable power transmission and smooth mode switching. By integrating both pneumatic and manual stepless adjustment functions, it effectively solves the problem of control failure in the event of unexpected power outages or malfunctions. The manual mechanism is equipped with a dial and mechanical seal, providing precise and intuitive on-site operation while ensuring the valve's external sealing. The rotating shaft employs a multi-seal design combining a graphite ring and a PTFE sealing ring, enhancing the valve shaft's high-temperature resistance, corrosion resistance, and dynamic sealing performance. This comprehensively improves the valve's reliability, safety, and service life during use. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the connecting component of this utility model; Figure 3 This is a three-dimensional structural diagram of the manual adjustment mechanism of this utility model; Figure 4 This is a cross-sectional view of the connection between the rotating shaft, the sealing ring, and the graphite ring of this utility model.

[0016] icon: 1. Outer shell; 2. Manual adjustment mechanism; 10. Support frame; 11. Connecting ear; 12. Multi-stage cylinder; 13. Connecting assembly; 14. Rotating shaft; 15. Movable plate; 20. Fixed rod; 21. Mechanical seal; 22. Connecting frame; 23. Handwheel; 130. Connecting rod; 131. Clamping frame; 132. Slide rod; 133. Rotating plate; 134. Linkage rod; 140. Graphite ring; 141. Sealing shell; 142. Sealing ring; 1331. Ratchet tooth; 1341. Pawl tooth. Detailed Implementation

[0017] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0018] Please refer to Figure 1 This utility model provides a pneumatic valve that is easy to manually steplessly adjust, including a housing 1, on which a support frame 10 is fixedly mounted, and a connecting ear 11 is fixedly mounted on the support frame 10. A multi-stage cylinder 12 is hinged to the connecting ear 11, and a connecting assembly 13 is provided at the output end of the multi-stage cylinder 12. A movable plate 15 for adjusting the flow rate is provided on the inner side of the housing 1, and a rotating shaft 14 is fixedly mounted on the movable plate 15. The multi-stage cylinder 12 drives the rotating shaft 14 to rotate through the connecting assembly 13, thereby driving the movable plate 15 to rotate. A manual adjustment mechanism 2 is provided on the outer side of the housing 1, and the manual adjustment mechanism 2 is used to manually control the rotation of the movable plate 15.

[0019] like Figure 2As shown, the connecting assembly 13 includes a connecting rod 130 fixedly connected to the telescopic end of the multi-stage cylinder 12, and a clamping frame 131 is fixedly provided at the end of the connecting rod 130 away from the multi-stage cylinder 12. A sliding rod 132 is fixedly provided on the clamping frame 131, and a rotating plate 133 is rotatably provided on the sliding rod 132. A linkage rod 134 is provided on the inner side of the rotating plate 133, and the linkage rod 134 is fixedly connected to the rotating shaft 14. A ratchet tooth 1331 is provided on the inner side of the rotating plate 133, and a pawl tooth 1341 is provided on the outer side of the linkage rod 134. The pawl tooth 1341 meshes with the ratchet tooth 1331. The meshing of the ratchet and the pawl realizes unidirectional transmission, effectively preventing the reverse impact of the actuator when pneumatically driven, and realizing clutch engagement and overrunning in manual mode, ensuring the reliability and safety of control.

[0020] like Figure 3 As shown, the manual adjustment mechanism 2 includes a fixed rod 20 fixedly connected to the movable plate 15, and one end of the fixed rod 20 extends to the outside of the housing 1 and is fixedly connected to a connecting frame 22. A handle wheel 23 is fixedly installed on the connecting frame 22, and the handle wheel 23 is used to drive the connecting frame 22 to rotate. A mechanical seal 21 is rotatably installed on the outside of the fixed rod 20, and the mechanical seal 21 is fixedly connected to the housing 1. A scale is provided on the handle wheel 23 to indicate the rotation angle of the movable plate 15. By integrating the fixed rod 20 with the mechanical seal 21 and the externally mounted handle wheel 23 with the scale, the valve's external sealing performance is ensured while providing a precise and intuitive stepless manual adjustment function, which is convenient for emergency operation in case of power failure or malfunction.

[0021] like Figure 4 As shown, a graphite ring 140 is provided on the outer side of the rotating shaft 14, and a sealing shell 141 is fixedly provided on the outer side of the graphite ring 140. The sealing shell 141 is fixedly connected to the outer shell 1. A sealing ring 142 is provided between the rotating shaft 14 and the sealing shell 141. The sealing ring 142 is made of polytetrafluoroethylene. The sealing scheme of graphite ring 140 and polytetrafluoroethylene sealing ring 142 forms multiple sealing barriers, which significantly enhances the sealing effect of the valve shaft. It also has the characteristics of high temperature resistance, self-lubrication and chemical corrosion resistance, which greatly extends the service life.

[0022] In summary, when using this pneumatic valve that allows for easy manual stepless adjustment, the telescopic movement of the multi-stage cylinder 12 drives the connecting rod 130 and the clamping frame 131, which in turn pushes the rotating plate 133 to rotate via the slide rod 132. The ratchet teeth 1331 on the inner side of the rotating plate 133 mesh with the pawl teeth 1341 on the linkage rod 134, thereby transmitting power unidirectionally to the linkage rod 134 and driving the rotating shaft 14 and the movable plate 15 to rotate precisely, thus achieving stepless adjustment of the valve. In the event of a power outage or air supply failure, the handle wheel 23 of the manual adjustment mechanism 2 can be directly operated, and the movable plate 15 can be forcibly rotated via the connecting frame 22 and the fixed rod 20. At this time, the pawl teeth 1341 can slide over the ratchet teeth 1331, realizing manual overrunning clutch operation, thereby ensuring continuous production and high safety.

[0023] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pneumatic valve that is easy to manually steplessly adjust, characterized in that: The device includes a housing (1) and a support frame (10) fixedly mounted on the housing (1). A connecting ear (11) is fixedly mounted on the support frame (10), and a multi-stage cylinder (12) is hinged to the connecting ear (11). A connecting component (13) is provided at the output end of the multi-stage cylinder (12). A movable plate (15) for adjusting the flow rate is provided on the inner side of the housing (1), and a rotating shaft (14) is fixedly mounted on the movable plate (15). The multi-stage cylinder (12) drives the rotating shaft (14) to rotate through the connecting component (13), thereby driving the movable plate (15) to rotate. A manual adjustment mechanism (2) is provided on the outer side of the housing (1), and the manual adjustment mechanism (2) is used to manually control the rotation of the movable plate (15).

2. The pneumatic valve according to claim 1, characterized in that: The connecting assembly (13) includes a connecting rod (130) fixedly connected to the telescopic end of the multi-stage cylinder (12), and a clamping frame (131) is fixedly provided at the end of the connecting rod (130) away from the multi-stage cylinder (12). A sliding rod (132) is fixedly provided on the clamping frame (131), and a rotating plate (133) is rotatably provided on the sliding rod (132). A linkage rod (134) is provided on the inner side of the rotating plate (133), and the linkage rod (134) is fixedly connected to the rotating shaft (14).

3. A pneumatic valve for easy manual stepless adjustment according to claim 2, characterized in that: The rotating plate (133) has ratchet teeth (1331) on its inner side, and the linkage rod (134) has pawl teeth (1341) on its outer side, and the pawl teeth (1341) mesh with the ratchet teeth (1331).

4. A pneumatic valve for easy manual stepless adjustment according to claim 1, characterized in that: The manual adjustment mechanism (2) includes a fixed rod (20) fixedly connected to the movable plate (15), and one end of the fixed rod (20) extends to the outside of the outer shell (1) and is fixedly connected to a connecting frame (22). A handle wheel (23) is fixedly provided on the connecting frame (22), and the handle wheel (23) is used to drive the connecting frame (22) to rotate.

5. A pneumatic valve for easy manual stepless adjustment according to claim 4, characterized in that: The outer side of the fixed rod (20) is provided with a mechanical seal (21), and the mechanical seal (21) is fixedly connected to the outer shell (1).

6. A pneumatic valve for easy manual stepless adjustment according to claim 4, characterized in that: The handle wheel (23) is provided with a dial for indicating the rotation angle of the movable plate (15).

7. A pneumatic valve for easy manual stepless adjustment according to claim 1, characterized in that: A graphite ring (140) is provided on the outer side of the rotating shaft (14), and a sealing shell (141) is fixedly provided on the outer side of the graphite ring (140), and the sealing shell (141) is fixedly connected to the outer shell (1).

8. A pneumatic valve for easy manual stepless adjustment according to claim 7, characterized in that: A sealing ring (142) is provided between the rotating shaft (14) and the sealing shell (141), and the sealing ring (142) is made of polytetrafluoroethylene.

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