Anti-cavitation quick-opening slow-closing pressure relief safety valve

Abstract

The invention discloses an anti-cavitation quick-opening slow-closing pressure relief safety valve. The valve comprises a main valve and a pilot valve, wherein the main valve comprises a main valve body, an inlet flow channel, an outlet flow channel and a valve element movable component, and the inlet flow channel and the outlet flow channel are formed in the main valve body; a valve control cavity which is communicated with the inlet flow channel and is variable in size is formed in the valve element movable component; the pilot valve comprises a pilot valve body, a first pilot valve inlet, a second pilot valve inlet and a pilot valve outlet, wherein the first pilot valve inlet is formed in the pilot valve body and communicated with the inlet flow channel, and the second pilot valve inlet and the pilot valve outlet are formed in the pilot valve body and communicated with the valve control cavity and the outlet flow channel correspondingly; the pilot valve is integrated on the valve element movable component through the second pilot valve inlet; and a control structure is arranged in the pilot valve body, wherein the control structure is used for opening the pilot valve to conduct the second pilot valve inlet and the pilot valve outlet when the pressure of the inlet flow channel is greater than the set pressure, and closing the pilot valve to cut off the second pilot valve inlet and the pilot valve outlet when the pressure of the inlet flow channel is less than the set pressure. The safety valve is reasonable in structural design, the response speed is increased, and the safety valve can quickly release pressure.

Description

technical field [0001] The invention relates to the technical field of pipeline valves, in particular to an anti-cavitation quick-opening and slow-closing pressure relief safety valve. Background technique [0002] The safety valve is a special valve whose opening and closing parts are normally closed by external force. When the medium pressure in the equipment or pipeline exceeds the specified value, it discharges the medium to the outside of the system to prevent the medium pressure in the pipeline or equipment from exceeding the specified value. Safety valves are automatic valves, mainly used in boilers, pressure vessels and pipelines, which can control the pressure not to exceed the specified value, thus playing an important role in protecting personal safety and equipment operation. [0003] Existing safety valves cannot adjust the pressure relief during pressure relief, and different safety valves need to be used when adjusting different pressures, thereby increasing t...

AI Technical Summary

Problems solved by technology

[0003] Existing safety valves cannot adjust the pressure relief during pressure relief, and different safety valves need to be used when adjusting different pressures, thereby increasing the cost of use, so it is inconvenient for users to use and reduces the safety valve. Practicality

In addition, the safety valve has cavitation damage, low control accuracy, and slow opening response, resulting in inability to quickly relieve pressure, and the fast closing speed leads to large pressure fluctuations, which have great destructive power on pipelines and safety valves

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