A blow-off valve with pressure feedback control

Abstract

The invention discloses a blow-off valve with pressure feedback control, which comprises an upper valve body, a pressure regulating assembly, a lower valve body, and a valve core; The connected outboard seawater interface; the upper part of the valve core is installed in the upper valve cavity, and the upper part of the valve core is connected with the pressure regulating assembly, and the pressure regulating component pushes the valve core to move axially; the valve cavity is set in the lower valve body; The lower valve cavity is composed of a connected upper cavity and a lower cavity; the two sides of the upper cavity are respectively provided with a compressed air inlet and a compressed air outlet, and the compressed air outlet is connected with the lower cavity; the lower end of the valve core passes through the upper cavity The body is connected with the end cover; the outer peripheral surface of the valve core is provided with a diversion groove that can communicate with the compressed air inlet, and forms a throttle port with the annular flow channel at the end of the compressed air inlet. The beneficial effects of the present invention are: the flow surface of the blow-off valve can be adjusted in real time according to the external seawater pressure and the compressed air pressure in the lower valve cavity, and the originally supplied compressed air can be decompressed to an appropriate 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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