Fluid control valve

Patent metadata

Field	Value
Publication number	US-2023375098-A1
Application number	US-202118029063-A
Country	US
Kind code	A1
Filing date	Sep 24, 2021
Priority date	Oct 1, 2020
Publication date	Nov 23, 2023
Grant date	—

Abstract

A fluid control valve having extremely high responsiveness not only when a pressure of a working fluid of a first flow path is high but also when the pressure of the working fluid of the first flow path is low includes: a valve seat; a valve body contacting and separating from the valve seat; a first biasing member biasing the valve body in a valve closing direction; and a second biasing member having a spring force lower than that of the first biasing member, wherein the valve body is axially divided into a base portion biased by the first biasing member and an opening and closing portion contacting and separating from the valve seat, and the second biasing member is disposed so that the base portion and the opening and closing portion are axially separable from each other.

First claim

1 . A fluid control valve, comprising:
a valve seat; a valve body configured to contact and separate from the valve seat; a first biasing member configured to bias the valve body in a valve closing direction; and a second biasing member having a spring force lower than that of the first biasing member and configured to bias the valve body in the valve closing direction, the valve seat and the valve body being provided between a first flow path and a second flow path and the fluid control valve being configured to discharge a working fluid of the first flow path is discharged to the second flow path depending on a pressure of the working fluid of the first flow path, and wherein the valve body is axially divided into a base portion biased by the first biasing member and an opening and closing portion configured to contact and separate from the valve seat, and the second biasing member is disposed so that the base portion and the opening and closing portion are axially separable from each other.

2 . The fluid control valve according to claim 1 ,
wherein the base portion is axially slidable with respect to a valve housing in which the base portion is housed.

3 . The fluid control valve according to claim 2 ,
wherein the opening and closing portion is axially slidable with respect to the base portion.

4 . The fluid control valve according to claim 1 ,
wherein a space inside a valve housing in which the base portion and the first biasing member are housed is a pilot control chamber, and the opening and closing portion is provided with a communication path which communicates the first flow path with the pilot control chamber.

5 . The fluid control valve according to claim 4 ,
wherein the second biasing member is disposed between the base portion and the opening and closing portion and outside the pilot control chamber.

Assignees

• Eagle Ind Co Ltd

Inventors

• Higashidozono Hideki

Classifications

• F16K1/36

  Valve members (for double-seat valves F16K1/44 {; for butterfly valves F16K1/222, F16K1/223}) · CPC title

• F16K1/443

  the seats being in series · CPC title

• F16K1/46

  Attachment of sealing rings · CPC title

• F16K31/406

  acting on a piston · CPC title

• F16K17/048

  combined with other safety valves, or with pressure control devices · CPC title