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Exhaust for gas meter valve

A technology for exhaust devices and gas meters, which is applied to valve devices, safety valves, balance valves, etc., and can solve problems such as failure to open

Inactive Publication Date: 2010-08-25
宣国平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention aims to solve the problem that the electric opening and closing valve of the gas meter cannot be opened due to the increase of the internal pressure of the valve due to slow leakage. Therefore, a gas meter valve exhaust device of the present invention is provided. The device is arranged on the gas meter valve, and it can Remove the gas in the part of the pressure increase in the valve in time, even if the valve leaks slowly, it will not cause the valve to fail to open, so that the valve operates reliably and has a long service life

Method used

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Embodiment Construction

[0016] The gas meter valve exhaust device is to set a cover 2 on the chamber of the valve body, the cover has a cover 21, the lower end of the cover opens through the chamber 1, and the upper part of the cover has an air outlet 211, and the cover is embedded with a There is an exhaust plug 4 made of rubber material. The outer wall of the exhaust plug has two steps that shrink radially sequentially from bottom to top. There is a gap 3 between the relatively small upper outer wall and the inner wall of the shroud. The exhaust plug has a blind hole 41 with an inner end open to communicate with the valve body chamber 1. The upper side wall of the exhaust plug is provided with radially symmetrical two The air outlet slit 42, the top surface of the exhaust plug is provided with an air outlet slit 43, the inner opening of the air outlet slit on the side wall and the top surface is connected with the blind hole 41 of the exhaust plug, and the outer opening of the air outlet slit is con...

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Abstract

The invention provides an exhaust device for gas meter valves, which can prevent pressure in a cavity of a gas meter valve from increasing and guarantee the long-term normal work of the valve. A sealing cover with a through hole is arranged on a valve body cavity; an exhaust plug (4) is inlaid in the through hole of the sealing cover; the exhaust plug is provided with a blind hole (41) which has the inner end opened and is communicated with the valve body cavity (1); the upper part of the exhaust plug is provided with an exhaust gap (42); the inner mouth of the exhaust gap (42) is communicated with the blind hole of the exhaust plug; and the outer mouth of the exhaust gap (42) is communicated with the external environment of the cavity (1). The exhaust device is suitable to be arranged onthe gas meter valve so as to ensure that the valve can normally work for a long time.

Description

technical field [0001] The invention relates to a gas meter electric valve assembly, in particular to a gas meter electric valve assembly with exhaust function. Background technique [0002] The electric opening and closing valve of the gas meter in the prior art is a relatively sealed device. Under normal circumstances, this kind of valve is absolutely sealed, and the gas outside the valve cavity in the gas meter cannot enter the valve cavity. At this time, the internal pressure of the valve is balanced, and normal opening and closing can be realized. But when the valve is in the slow leakage condition, after it works in the gas meter for a period of time, due to the pressure difference between the inside and outside of the valve cavity, the gas will gradually diffuse into the valve cavity, and the gas entering the valve cavity will The chemical reaction with the internal parts of the valve, especially plastic, rubber and other parts, produces gas, which gradually increase...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K17/164
Inventor 宣国平
Owner 宣国平
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