Pressure maintaining valve with variable opening pressure

Abstract

The invention discloses a pressure maintaining valve with variable opening pressure. The pressure maintaining valve includes a working end housing, a pressure source end housing, sealing rubber rings, a core rod, an inclined rubber stopper, a safety valve and a high pressure gas cylinder, wherein the working end housing is fixedly connected with the pressure source end housing; the other end of the pressure source end housing is fixedly connected with a safety valve; the safety valve is fixedly connected with the high pressure gas cylinder; the sealing rubber rings are arranged at the end, positioned in the pressure source end housing, of the core rod; the inclined rubber stopper is arranged at the end, positioned in the working end housing, of the core rod. The pressure maintaining valve with variable opening pressure provided by the invention adopts the principle that the external pressure of the safety valve core rod is equal to the internal pressure of the safety valve core rod; such a safety valve does not rely on the deformation of a part to bear the pressure, so that the metal fatigue problem does not exist; the pressure maintaining valve is simple in structure and convenient to install, and the variation range of the opening pressure value is wide.

Description

Technical field [0001] The invention belongs to a valve, and particularly relates to a pressure stabilizing valve with a variable opening pressure. Background technique [0002] The combustion characteristics of propellants under different pressure environments are important indicators of propellants. In the laboratory to study the combustion characteristics of propellants under different pressure environments, the common method is to ignite the propellant in a closed container for research. When the propellant burns, a large amount of gas is produced, which changes the pressure in the container, which causes the combustion of the propellant in the container to not burn at a constant pressure, which makes the experimental results have a large error. What Zhao Zhibo adopted in "Characteristic Analysis of Condensed Phase Combustion Products of NEPE High Energy Propellant" is to reduce the pressure fluctuation in the combustion chamber by draining the pressure on the basis of the st...

AI Technical Summary

Problems solved by technology

This kind of safety valve has a complex structure and is not suitable for processing and use in the test

Chinese Patent No. 201420084076.2 discloses a new type of safety valve, which also belongs to the spring type safety valve. Due to the limited rigidity of the spring, this type of safety valve cannot adjust the opening pressure of the safety valve in a large range.

When testing solid propellants burning under different pressures, the pressure range of the combustion chamber will vary greatly. When using a pressure-stabilizing valve with a relatively small opening pressure change, it must be replaced frequently. It is easy to move the combustion chamber during the process of replacing the safety valve and tightening it. To re-align the light, the efficiency of the experiment is low

Images