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Air valve structure

A gas valve and valve body technology, applied in the field of compressed gas decompression devices, can solve the problems of low pressure regulation accuracy, poor use stability, small pressure regulation range, etc., and achieve the advantages of small influencing factors, simple structure and many control points Effect

Inactive Publication Date: 2016-06-29
CHENGDU KESHENG PETROLEUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The decompression performance of the above-mentioned existing decompression valves with any structure is greatly affected by the springs installed therein, and the processing accuracy of the springs and the controllability of the change in mechanical properties during use are poor. In this way, the traditional high-pressure gas decompression The valve has a small range of pressure adjustment, low pressure adjustment accuracy, and poor stability in use. The invention provides a valve structure

Method used

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  • Air valve structure

Examples

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Effect test

Embodiment 1

[0021] Such as figure 1 As shown, a gas valve structure includes a valve body 9, an inlet passage 5 and an outlet passage 6 are arranged on the valve body 9, and a decompression portion communicating with the inlet passage 5 and the outlet passage 6 is arranged in the valve body 9. The decompression part includes a valve core 4 and a valve seat 1 arranged on the valve body 9. The valve body 9 is also screwed with a pressure seat 2, and a first spring 3 is arranged between the pressure seat 2 and the valve core 4. It also includes a regulating valve. The valve and the piston chamber 11 arranged in the valve body 9, the piston chamber 11 is arranged on the side of the decompression part close to the outlet passage 6, the piston chamber 11 is also provided with a piston 8, and the piston 8 is near the side of the valve core 4 One side is provided with a connecting rod 15 for fixedly connecting the piston 8 and the valve core 4, the intake end of the regulating valve communicates ...

Embodiment 2

[0026] The present embodiment is further limited on the basis of embodiment 1, as figure 1 As shown, in order to reduce the change speed of the channel area for gas flow between the valve core 4 and the valve seat 1 during the movement of the valve core 4, that is, to improve the controllability of the flow channel area, the valve seat 1 and the valve core The cross-sections of 4 are conical, and the valve seat 1 and the larger end of the valve core 4 are close to the inlet channel 5 . The above structure also facilitates the sealing of the valve core 4 and the valve seat 1 in the cut-off state of the present invention.

[0027] In order to facilitate the processing, assembly and maintenance of the present invention, the valve body 9 is provided with a straight through hole, the valve seat 1 is a diameter-reducing structure on the straight through hole, and one end of the straight through hole is threadedly connected to the pressure seat 2, directly The other end of the throu...

Embodiment 3

[0030] This embodiment is further limited on the basis of the above embodiments, as figure 1 As shown, in order to optimize the flow adjustment performance of the pressure regulating valve 13 and the relief valve 16, both the regulating valve and the relief valve 16 are cut-off valves.

[0031] In order to further optimize the above-mentioned flow adjustment performance, the sealing surface of the cut-off valve is tapered.

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Abstract

The invention discloses a gas valve structure, which comprises a valve body, an inlet channel and an outlet channel are arranged on the valve body, a decompression part is arranged in the valve body, the decompression part includes a valve core and a valve seat, and the valve body also has a A pressure seat is threadedly connected, a first spring is arranged between the pressure seat and the valve core, and a regulating valve and a piston chamber are also included. A piston is also arranged in the piston chamber, and a connecting rod is provided on the side of the piston close to the valve core. A discharge valve is also arranged on the outlet connecting pipe; a second spring with two ends in contact with the valve seat and the piston is also arranged between the valve seat and the piston. The invention has simple structure and high accuracy of regulating the outlet pressure.

Description

technical field [0001] The invention relates to the field of compressed gas decompression devices, in particular to a gas valve structure. Background technique [0002] As natural gas is used more and more widely, various forms of pressure reducing valves emerge in endlessly. Further optimization of the structure of natural gas pressure reducing valves will further promote the use of natural gas. Taking environmental awareness as an example, the use of natural gas as fuel for vehicle engines can greatly reduce vehicle exhaust pollution. However, in order to improve the single inflation stroke of vehicles fueled by natural gas, high-pressure gas cylinders are installed on vehicles to accommodate natural gas. The pressure of the natural gas introduced into the cylinder is generally several thousand pascals. In this way, the pressure reducing valve for reducing the pressure of high-pressure natural gas is particularly important. In terms of power and even driving safety. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K17/30F16K1/38F16K1/42F16K27/02
CPCF16K17/30F16K1/385F16K1/42F16K27/0254
Inventor 贺昶明
Owner CHENGDU KESHENG PETROLEUM TECH
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