Pneumatic valve control mechanism

Abstract

A pneumatic valve control mechanism is characterized by comprising a guide arm, a drive air cylinder and a magnetic reversing valve. An air inlet of the magnetic reversing valve is used for compressed air to be fed, and an air outlet is connected with an air inlet of the drive air cylinder. One end of the guide arm is connected with a valve element drive shaft of the valve, the guide arm can rotate around the valve element drive shaft of the valve and is provided with a chute, a slide shaft is installed in the chute, and the slide shaft is connected with a piston rod of the drive air cylinder to jointly form a connecting rod mechanism. The reciprocating motion of the piston rod drives the slide shaft to slide in the chute of the guide arm so as to form the connecting rod motion mechanism, the guide arm is driven to perform reciprocating rotation around the valve element drive shaft of the valve and further open or close the valve, and remote control of the valve is achieved through the magnetic reversing valve. On the basis, the position required to be reached, of the piston rod can be calculated according to the opening degree of the valve, then the position of a proximity switch sensing end on the drive air cylinder is adjusted, and accordingly accurate positioning during valve opening is achieved.

Description

technical field [0001] The invention relates to a valve control device, in particular to a pneumatic valve control mechanism. Background technique [0002] In fluid conveying pipelines, valves are widely used, but at present, valves can only be switched on and off by direct operation of the valve stem, and cannot be operated remotely; moreover, for some precision instruments, it is required to accurately control the valve opening, and manual operation of the valve is required. The lever is far from enough, so the current technology affects its convenience of use to a certain extent, and it is more laborious to use the direct operation valve, which affects its ease of use. Contents of the invention [0003] The invention provides a pneumatic valve control mechanism with simple structure and convenient use, which can realize opening and closing of the valve by remote operation without directly operating the valve. The specific technical scheme is as follows: [0004] A pne...

AI Technical Summary

Problems solved by technology

[0002] In fluid conveying pipelines, valves are widely used, but at present, valves can only be switched on and off by directly operating the valve stem, and cannot be operated remotely; and for some precision instruments, it is required to accurately control the valve opening, and the valve operation is manually operated. The lever is far from enough, so the current technology affects its convenience of use to a certain extent, and at the same time, it is laborious to use the direct operation valve, which affects its ease of use

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