Blow-off valve with pressure feedback control

Abstract

The invention discloses a blow-off valve with pressure feedback control. The blow-off valve comprises an upper valve body, a pressure regulating assembly, a lower valve body and a valve element, wherein an upper valve cavity is formed in the upper valve body, an outboard seawater connecting port communicating with the upper valve cavity is formed in the side portion of the upper valve body, the upper portion of the valve element is installed in the upper valve cavity, the upper portion of the valve element is connected with the pressure regulating assembly, the pressure regulating assembly pushes the valve element to move in the axial direction, a lower valve cavity is formed in the lower valve body, the lower valve cavity is composed of an upper cavity body and a lower cavity body which are in communication with each other, a compressed air inlet and a compressed air outlet are formed in two sides of the upper cavity respectively, the compressed air outlet communicates with the lowercavity, the lower end of the valve element penetrates through the upper cavity and is connected with an end cover, and a flow guide groove capable of communicating with the compressed air inlet is formed in the peripheral face of the valve element to form a throttling opening together with an annular flowing channel at the tail end of the compressed air inlet. The blow-off valve with pressure feedback control has the beneficial effects that the circulation face of the blow-off valve can be adjusted in real time according to the external seawater pressure and the compressed air pressure in thelower valve cavity, and the originally-supplied compressed air is decompressed to the proper pressure.

Description

technical field [0001] The invention relates to the technical field of underwater vehicle sewage treatment, in particular to a blow-off valve with pressure feedback control. Background technique [0002] The underwater vehicle collects sewage through a pressure vessel, and the sewage in it needs to be blown off regularly, and the sewage is pressed out by injecting compressed air into the pressure vessel when blowing off. In order to ensure that blow-off can be carried out at various depths, the compressed air used by the aircraft is generally much higher than the external seawater pressure during actual blow-off. Existing stop valves cannot adjust the blowing air supply pressure according to the blowing needs. When compressed air is blown down under a relatively high pressure difference, the high pressure blowing will generate flow-induced structural noise and jet noise. Due to the fast blowing rate, the entire blowing time If it is too short, more compressed air will be di...

AI Technical Summary

Problems solved by technology

Existing stop valves cannot adjust the blowing air supply pressure according to the blowing needs. When compressed air is blown down under a relatively high pressure difference, the high pressure blowing will generate flow-induced structural noise and jet noise. Due to the fast blowing rate, the entire blowing time If it is too short, more compressed air will be discharged after the container is emptied, forming cavitation bubbles, resulting in loud transient radiation noise underwater

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