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Automatic gas cut-off device

An automatic shut-off and gas technology, applied in the direction of cocks including shut-off devices, valve devices, valve operation/release devices, etc., can solve problems such as gas shut-off, and achieve the effect of reducing pressure loss, realizing structure, and reducing the number of parts

Active Publication Date: 2021-01-12
KOYO SANGYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the flow of gas is cut off

Method used

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  • Automatic gas cut-off device

Examples

Experimental program
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Effect test

Embodiment Construction

[0052] Hereinafter, an automatic gas shutoff device according to an embodiment of the present invention will be described with reference to the drawings.

[0053] About the device body

[0054] Such as Figure 1 to Figure 5 As shown, the gas automatic cut-off device has an elongated device body 10 . A gas passage 11 linearly extending in the longitudinal direction thereof is formed inside the device main body 10 . An external thread portion 12 is formed at an end portion on the upstream side (right side in the drawing) of the device main body 10, and a joint (both not shown) provided at the end portion of the gas supply pipe is screwed to the external thread portion 12. . A hose terminal 13 is formed at an end portion on the downstream side (left side in the drawing) of the device main body 10 , and a rubber hose (both not shown) extending from gas equipment is connected to the hose terminal 13 .

[0055] On the upstream side of the device body 10 , a support hole 14 con...

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PUM

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Abstract

The invention discloses an automatic gas cut-off device, wherein a cut-off valve structure (40) is disposed adjacent to a pressure-receiving chamber (15) in a gas passage (11) of a device body (10); the cut-off valve structure is provided with a valve seat (42), a cut-off valve (44), a valve spring (45) for applying force to the cut-off valve toward the valve seat, and a valve rod (47) protrudingfrom the cut-off valve to the pressure-receiving chamber; a control mechanism (50) is provided with a diaphragm (51), an operation lever (60) and diaphragm springs (53 and 54), wherein the diaphragm (51) covers an opening (16) of the pressure-receiving chamber and receives gas pressure, the operation lever (60) is connected to the diaphragm, and the diaphragm springs (53 and 54) apply force to thediaphragm toward the pressure-receiving chamber; the operation lever is provided with an operation protrusion (65), and the front end of the valve rod abuts against the abutting surface (66) formed on the operation protrusion by the force of the valve spring; and the abutting surface of the operation protrusion is provided with a first inclined surface (66b) facing the diaphragm and approaching the central axis of the operation lever, and a second inclined surface (66c) facing the opposite side of the diaphragm and approaching the central axis of the operation lever.

Description

technical field [0001] The present invention relates to a device capable of automatically shutting off the supply of gas in response to changes in the pressure of the supplied gas. Background technique [0002] When the gas supply pressure fluctuates during the use of gas equipment, there may be problems that the flame becomes stronger or the combustion becomes unstable. Therefore, in order to realize the safety of users, various devices have been developed that automatically shut off the gas supply when the gas supply pressure becomes higher or lower than a predetermined pressure range. [0003] The gas automatic shutoff device disclosed in Chinese patent publication CN106763954A (hereinafter referred to as document 1) will be described. A part of the gas passage of the device body is provided as a pressurized chamber. In the gas passage, a low-pressure shutoff valve is arranged on the upstream side of the pressure receiving chamber, and a high-pressure shutoff valve is a...

Claims

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Application Information

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IPC IPC(8): F16K17/04F16K1/00F16K1/38F16K1/32F16K1/36F16K5/06F16K31/60F16K31/126
CPCF16K1/00F16K1/32F16K1/36F16K1/38F16K5/06F16K17/04F16K31/1262F16K31/60
Inventor 岩片真理夫宫川成一小竹善之
Owner KOYO SANGYO CO LTD