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Gas driving membrane turnover type normally closed valve

A driving membrane, flip-type technology, applied in the direction of valve details, safety valves, balance valves, etc., can solve the problems of gas-driven valve sealing performance that cannot meet the requirements, large volume, etc., to ensure sealing reliability, enhance sealing reliability, The effect of reducing drag

Active Publication Date: 2020-04-17
XIAN AEROSPACE PROPULSION INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the sealing performance of the existing gas-driven valve is difficult to meet the requirements and the volume is large, and to provide a gas-driven diaphragm flip-type normally closed valve

Method used

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  • Gas driving membrane turnover type normally closed valve
  • Gas driving membrane turnover type normally closed valve
  • Gas driving membrane turnover type normally closed valve

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Embodiment Construction

[0021] The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] In order to improve the pressure adaptability and temperature adaptability of the existing multi-channel non-metallic redundant dynamic seals, and improve the sealing characteristics after the piston and the valve body are wedged tightly, the invention provides a gas-driven diaphragm flip-type normally closed valve. The normally closed valve uses a metal diaphragm to seal the gas to prevent leakage. It adopts a split structure of the piston and the cutter to distribute the energy of the gas. It adopts an elastic snap ring structure to effectively limit the cutter and prevent backlash. The invention can be applied in the high-pressure medium control pipeline required for long-term storage.

[0023] Such as Figure 1 to Figure 5 As shown, the gas-driven diaphragm flip-type normally closed valve provided by the pre...

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Abstract

The invention relates to a gas driving membrane turnover type normally closed valve. The problems that the sealing performance of an existing gas driving valve cannot meet the requirements, and the size is large are solved. The gas driving membrane turnover type normally closed valve comprises a transfer connection cap, a piston, a shell, an upper valve element, a lower valve element, a cutter, amembrane and a snap ring. An electric explosion pipe is installed at one end of the transfer connection cap, and the other end of the transfer connection cap is fixedly connected with the shell. An inner conical surface is arranged on the inner surface of the shell, an outer conical surface is arranged on the outer surface of the piston, the inner conical surface and the outer conical surface cooperate with each other when the valve is opened, and the sealing operation of the shell and the piston is achieved. The membrane is of a disc-shaped structure, the inner side of the membrane is fixedlyarranged on the outer surface of the piston, and the outer side of the membrane is fixedly arranged on the transfer connection cap. The piston and the cutter are arranged in a cavity of the shell insequence, and a gap is formed between the piston and the cutter. A through notch is formed in the end face of the cutter, a circumferential through hole which is through is formed in the peripheral surface of the shell, and the upper valve element and the lower valve element are arranged in the circumferential through hole and pass through the notch of the cutter.

Description

technical field [0001] The invention relates to a valve, in particular to a gas-driven membrane flip-type normally closed valve, which can be used for medium and long-term storage in a system, and is especially widely used in liquid rocket engines. Background technique [0002] Gas-driven valves are widely used in liquid rocket engines because of their good sealing performance and high reliability, especially when long-term storage requirements are involved. Most of the gas sealing structures of existing gas-driven valves use non-metallic O-rings or non-metallic O-rings plus non-metallic retaining rings to seal the gas, and its long-term storage and environmental adaptability are affected by non-metallic materials, especially in Vacuum, high temperature and low temperature environments are limited, and non-metallic materials have been difficult to meet the requirements; at the same time, the cutter and the stressed piston of the existing gas-driven valve have an integrated s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K17/40F16K31/122
CPCF16K17/403F16K31/122
Inventor 胡攀李小明王运卯董万峰谭屏
Owner XIAN AEROSPACE PROPULSION INST
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