Pneumatic high pressure regulating valve

Abstract

The invention discloses a pneumatic high pressure regulating valve. The pneumatic high pressure regulating valve comprises an executing mechanism and a valve part which is arranged under the executing mechanism, wherein the valve part comprises a valve body; an inlet runner and an outlet runner are arranged in the valve body; and an angle formed between the inlet runner and the outlet runner is 120 degrees. The pneumatic high pressure regulating valve disclosed by the invention has the advantages as follows: as the plurality of special structural designs are adopted, applicable pressure difference of the valve is very high and cavitation phenomenon is completely eliminated; sensitive action and high response speed are obtained and the pneumatic high pressure regulating valve can be freely closed and opened and can be tightly closed when meeting very high fluid pressure difference; a side flange and a valve cage of the specially designed valve body can be also used for guiding fluid, buffering fluid pressure and protecting a valve core against being damaged by fluid ablation, flash evaporation and cavitation; meanwhile, noises can be also reduced; simple and rapid maintenance and low cost are also obtained; the service life is obviously prolonged; and the pneumatic high pressure regulating valve is especially suitable for automatically controlling high temperature and high pressure mediums with high pressure differences and is safe and reliable in use. The pneumatic high pressure regulating valve disclosed by the invention is especially incomparable with other valves in advantages when being used for places with high pressure urea and other easily crystallized mediums.

Description

technical field

[0001] The invention relates to a pneumatic high-pressure regulating valve. Background technique

[0002] Pneumatic high-pressure regulating valves are mainly used in automatic control systems for high-pressure and high-pressure differential conditions in petroleum, chemical, fertilizer, power generation and other industries. The process conditions are relatively harsh, and the reliability and safety requirements for regulating valves are relatively high.

[0003] The common type pneumatic high-pressure control valve is a 90-degree right-angle angle control valve equipped with a multi-spring pneumatic diaphragm actuator. Due to the low compressive strength of the rubber diaphragm, the air source pressure is low and the output force is relatively small. Furthermore, because the flow path of the valve body is in the shape of a 90-degree right angle, the impact force of the high-pressure fluid is very large. The valve cage is equipped with a common structure, an...

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