A compartment type relief valve and its working method

Abstract

A separation cavity type relief valve comprises a main valve body and a check valve body, wherein the main valve body comprises a main valve cavity and a backpressure cavity which are separated by a corrugated pipe combination piece; the check valve body comprises a control valve, a feedback cavity and a deflation cavity; the control cavity and the feedback cavity are separated by a corrugated pipe; the feedback cavity and the deflation cavity are connected or disconnected through a movable valve; the deflation cavity is connected with the backpressure cavity through a communication pipe; the feedback cavity is connected with the main valve cavity through a drainage pipe; and a gas outlet of the check valve body is connected with a gas outlet of the main valve body through a vent pipe. The control cavity and the feedback cavity of the check valve body are separated, the control cavity draws pressure from a storage tank, the feedback cavity draws pressure from a main valve port, and therefore the problems that in an existing installation mode of an existing relief valve, the pressure of a storage tank is too low and a main valve is opened in advance are solved.

Description

technical field [0001] The invention relates to a relief valve and a working method, in particular to a chamber-separated relief valve and a working method used in launch vehicles in active service. Background technique [0002] The relief valve is an important single unit used in the pressurized delivery system of the launch vehicle. Its function is to protect the pressure of the tank from exceeding the set value; when the propellant in the tank needs to overflow, it can be forced to open the overflow propellant. [0003] The installation method of the relief valve in the pressurized delivery system of the active launch vehicle is as follows: figure 1 As shown, it includes: tank air pillow, tee, safety overflow valve, booster pipe for the outer section of the tank and booster tube for the inner section of the tank. The pressurization pipe in the inner section of the tank installed obliquely in the tank communicates with the air pillow of the tank, and the other end is conn...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned deficiencies in the prior art, the present invention provides a cavity-separated safety relief valve, which separates the command valve control cavity from the feedback cavity, the control cavity draws pressure from the storage tank, and the feedback cavity from the main valve port (gas inlet ) pressure introduction to solve the problem of low tank pressure and the early opening of the main valve caused by the existing safety relief valve under the current installation method

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