Pneumatic piston actuating mechanism with clutch type hand-operating mechanism for sluice valve

Abstract

The invention discloses a pneumatic piston actuating mechanism with a clutch type hand-operating mechanism for a sluice valve. The pneumatic piston actuating mechanism comprises a pneumatic actuatingmechanism and the clutch type hand-operating mechanism, wherein the pneumatic actuating mechanism comprises a cylinder body, an upper end cover, a lower end cover, a piston and a piston rod; the clutch type hand-operating mechanism comprises a support, a handwheel, a leadscrew nut transmission structure and a push rod; and the support is fixed at the top of the upper end cover, the upper end of the piston rod penetrates through the piston, the lower end of the push rod penetrates through the upper end cover to be connected to the upper end of the piston rod, the lower end of the piston rod penetrates through the lower end cover, and a valve rod of a valve is double as the piston rod. According to the pneumatic piston actuating mechanism disclosed by the invention, the distance between thepneumatic actuating mechanism and a valve closing member can be effectively reduced, so that the integral height of the valve is reduced; and the problem that axiality does not exist between the piston rod and the valve rod is solved, the additional abrasion brought by linearity reduction caused by the connection of rod parts is reduced, and the operation stability of the valve and the pneumatic actuating mechanism is improved.

Description

technical field [0001] The invention relates to the field of valves, in particular to a pneumatic piston actuator with a clutch type manual mechanism for a gate valve. Background technique [0002] In large-scale oil refineries, chemical plants and storage tanks, many switch gate valves are used to cut off the medium in the pipeline. Because the cost of human resources is increasing year by year, and it takes a long time to switch a valve, the labor intensity is high and urgent. It is necessary to use automated devices instead of labor to improve work efficiency, and because such working conditions generally have high explosion-proof requirements, general electric actuators cannot meet their requirements, and electric actuators that meet their explosion-proof requirements are expensive. , Therefore, the pneumatic actuator has become the first choice for the drive device, and in order to force the valve to switch under special circumstances, the pneumatic actuator needs to be...

AI Technical Summary

Problems solved by technology

[0002] In large-scale oil refineries, chemical plants and storage tanks, many switch gate valves are used to cut off the medium in the pipeline. Because the cost of human resources is increasing year by year, and it takes a long time to switch a valve, the labor intensity is high and urgent. It is necessary to use automated devices instead of labor to improve work efficiency, and because such working conditions generally have high explosion-proof requirements, general electric actuators cannot meet their requirements, and electric actuators that meet their explosion-proof requirements are expensive. Therefore, the pneumatic actuator has become the first choice for the driving device, and in order to force the valve to switch under special circumstances, the pneumatic actuator needs to be equipped with a clutch type manual operating mechanism

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