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poppet valve

A technology of poppet valve and seat, which is applied in the direction of lift valve, balance valve, valve device, etc.

Active Publication Date: 2017-02-08
KYB CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As a pressure reducing valve installed in a flow path of high-pressure and large-flow gas, including the above-mentioned conventional pressure reducing valve, a vortex is generated downstream of the portion where the flow of high-pressure gas is throttled, and a gas flow generates a vortex. high frequency noise

Method used

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Examples

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Embodiment Construction

[0014] with reference to the attached figure 1 , in the fuel cell system, the poppet valve 1 is used to depressurize the fuel gas of, for example, 30-70 megapascals (MPa) in the fuel tank to a pressure of several MPa and supply it to the fuel cell. Hydrogen is used in the fuel gas. The poppet valve 1 is not limited to hydrogen gas, and can be used to adjust the pressure of a fluid in other devices and equipment using other gases or liquids.

[0015] The poppet valve 1 includes: a valve seat 20, which is annular in cross section, and has a through hole for gas to pass through at the central part; The flow of the piston 40, which utilizes the gas pressure on the downstream side than the valve seat 20 to drive the valve body 60; the spring 11, which is used to apply force to the valve body 60 in the valve opening direction; and the spring 12, which overcomes the action of the spring 11 The force is applied to the valve body 60 in the valve closing direction. The piston 40 is ...

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Abstract

The poppet valve includes: a seat portion (22) having an inner peripheral surface having a conical shape with a central axis (O); The inner side is displaced, and a flow path having an annular cross section is formed between the conical part (61) and the seat part (22), and the conical part (61) is supported at a position concentric with the seat part (22). Thereby, the rectification effect of the fluid flowing in the flow path is improved, and the generation of noise is prevented.

Description

technical field [0001] The present invention relates to the construction of a poppet valve for controlling the pressure of a fluid. Background technique [0002] A pressure reducing valve is used in a fuel cell system to reduce primary pressure fuel gas introduced from a fuel tank to a predetermined secondary pressure and supply it to the fuel cell. [0003] JP10-169792A issued by the Japan Patent Office in 1998 proposed a valve as a pressure reducing valve for high-flow and high-pressure fuel gas, in which a plurality of plates and elastomer spacers are alternately stacked and placed on the plate. Slits are formed between them. [0004] JP2010-026825A issued by the Japan Patent Office proposes a poppet type pressure reducing valve. The decompression valve includes a valve seat through which gas passes, and a liftable valve body facing the valve seat, and a throttling flow path is defined between the valve seat and the valve body. [0005] As a pressure reducing valve ins...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D16/10F16K17/30H01M8/04
CPCH01M8/04201F16K47/02F16K1/42G05D16/107Y10T137/7804Y10T137/7809Y10T137/7823F16K47/04Y02E60/50G05D16/10H01M8/04
Inventor 中村善也永田精一香川利春尹钟晧
Owner KYB CORP