Spring buffer pneumatic actuator

Abstract

The invention relates to a spring buffer type pneumatic executing mechanism. The spring buffer type pneumatic executing mechanism comprises an existing conventional piston type pneumatic executing mechanism, wherein the piston type pneumatic executing mechanism comprises a cylinder block, an upper cylinder cover, a lower cylinder cover and a piston. The spring buffer type pneumatic executing mechanism is characterized in that a plurality of upper spring buffer units which are uniformly distributed along the circumferential direction are arranged on the inner plane of the upper cylinder cover; the upper spring buffer units are matched with the upper surface of the piston, and are used for buffering the upward action of the pneumatic executing mechanism; a plurality of lower spring buffer units which are uniformly distributed along the circumferential direction are arranged on the inner plane of the lower cylinder cover; the lower spring buffer units are matched with the lower surface of the piston, and are used for buffering the downward action of the pneumatic executing mechanism. The spring buffer type pneumatic executing mechanism is skillful in structure, is reasonable in design, can be applied to the occasion of rapid and frequent actions, is accurately controllable in buffer stroke, has a small buffer stroke, and does not influence the response speed of the pneumatic executing mechanism; the pneumatic executing mechanism has a spring buffer function at the starting point and end point of the stroke.

Description

technical field [0001] The invention relates to a pneumatic actuator, in particular to a spring buffer type pneumatic actuator. Background technique [0002] At present, there are more and more occasions where pneumatic control valves are used for frequent switching and fast cut-off control. However, in actual use, some pneumatic control valves have special structures such as soft valve seats or sharp-angle sealing valve seats, which do not allow pneumatic control valves to be violent. hit. In addition, when the circulating medium is a flammable and explosive special medium, it is easy to generate sparks due to collision and cause accidents, and violent impact of the pneumatic control valve is not allowed. In this way, in the occasions that require frequent switching and quick cut-off control, the pneumatic control valve using the existing conventional pneumatic actuator can no longer meet the requirements of use, which requires the design of a pneumatic actuator with a buf...

AI Technical Summary

Problems solved by technology

[0002] At present, there are more and more occasions where pneumatic control valves are used for frequent switching and fast cut-off control. However, in actual use, some pneumatic control valves have special structures such as soft valve seats or sharp-angle sealing valve seats, which do not allow pneumatic control valves to be violent. strike

In addition, when the circulating medium is a flammable and explosive special medium, it is easy to generate sparks due to collision and cause accidents, and violent impact of the pneumatic control valve is not allowed.

In this way, in the occasions that require frequent switching and quick cut-off control, the pneumatic control valve using the existing conventional pneumatic actuator can no longer meet the requirements of use, which requires the design of a pneumatic actuator with a buffer device as this type of pneumatic control valve. Drive device to avoid violent impact of pneumatic control valves in frequent switching and fast cut-off control occasions

[0003] Although there are many types of pneumatic actuator products with buffer devices, most of them realize buffer control by changing the flow of intake and exhaust, and there are still many problems, such as long buffer strokes, opening and closing There is a serious lag in the position; if the large-scale pneumatic actuator adopts this buffer control principle, its structural size is large, the space required for installation is large, and the production cost is also high

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