New Worm Gear Pneumatic Control Valve

Abstract

The invention discloses a novel worm gear pneumatic control valve which comprises a valve body, a film head and valve rods, wherein a valve seat and a valve element fitted with the valve seat are arranged in the valve body; a spring is arranged in the film head; the valve rods comprise an upper valve rod and a lower valve rod; one end of the upper valve rod is connected with the film head; the other end of the upper valve rod is provided with a worm gear case; a worm gear and a worm are arranged in the worm gear case; one end of the lower valve rod is connected with the valve element; the other end of the lower valve rod is provided with a hand wheel case; a screw rod is arranged in the hand wheel case; the worm gear is meshed with the screw rod. The novel worm gear pneumatic control valve disclosed by the invention has the characteristic of integrating automatic control and manual control; manual operation is fast and labor-saving and can be completed by one person, so that the loss caused by the delayed time that the automatic control on the control valve is failed and manual operation is needed in emergency is reduced; the safety is improved; the effect on large pneumatic control valves is more obvious.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a novel worm gear pneumatic regulating valve. Background technique [0002] Pneumatic control valve, also known as pneumatic actuator, uses compressed gas as the power source to drive the valve to realize switch or proportional regulation. Pneumatic regulating valve is characterized by simple control, reliable action, fast response, stable performance, convenient maintenance, and intrinsically safe, without additional measures for fire and explosion protection. It is widely used in petroleum, chemical, electric power, metallurgy and other industrial enterprises. One of the process control instruments. [0003] The operation of the pneumatic control valve must be under the condition of normal power supply and stable gas source pressure. Once the gas source or power fails or in an emergency, the valve will not be able to close or open normally, resulting in serious consequences. T...

AI Technical Summary

Problems solved by technology

[0005] Although the above technology solves the problem that the valve cannot be used normally when the gas source, power failure or emergency occurs, manual operation needs to overcome the elastic force of the spring in the cylinder of the pneumatic valve. Rapid operation, but when the size of the pneumatic valve increases, the spring force in the cylinder increases exponentially, especially for large pneumatic valves, manual operation often requires several people, and it takes a long time. When an emergency occurs, it is easy to cause Losses and Safety Incidents

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