Control valve

Patent metadata

Field	Value
Publication number	US-9556961-B2
Application number	US-201414483123-A
Country	US
Kind code	B2
Filing date	Sep 10, 2014
Priority date	Sep 25, 2013
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

A valve element has a packing material, whose one side surface touches and leaves a valve seat as a sealing surface, and a support member, which is driven in opening and closing directions of a valve section by actuating an actuator. The support member includes a supporting surface, which is in contact with a side surface of the packing material opposite to the sealing surface of the packing material, and an engagement part, which supports a peripheral edge part of the packing material in a manner such that the engagement part is engaged with the peripheral edge part. A ring-shaped fluid flow passage is formed between the supporting surface of the support member and the packing material, and this fluid flow passage communicates with an upstream passage.

First claim

What is claimed is:

1. A control valve comprising:
a body having a lead-in port through which a fluid is led in, a lead-out port through which the fluid is led out, and a valve hole provided in a fluid passage joining the lead-in port to the lead-out port, wherein a valve seat is provided in an opening end of the valve hole;
a valve element that opens and closes a valve section by touching and leaving the valve seat from an upstream side and blocks flow of the fluid between an upstream passage and a downstream passage in the fluid passage when the valve section is closed; and
an actuating rod that operates to open and close the valve section,
the valve element having:
a flexible sealing member whose one side surface touches and leaves the valve seat as a sealing surface; and
a support member that supports the sealing member with the sealing surface exposed toward the valve seat and is driven in opening and closing directions of the valve section by actuating the actuating rod,

wherein the support member includes a supporting surface, which is in contact with a back surface of the sealing member opposite to the sealing surface of the sealing member, and an engagement part, which is engaged with the sealing surface of the sealing member,
wherein the sealing member is fixed to the support member in such a manner that an outer peripheral edge part of the sealing member is held between an outer peripheral edge part of the supporting surface and the engagement part, and
wherein a ring-shaped fluid flow passage is formed through a gap formed between the supporting surface of the support member and the back surface of the sealing member, and the fluid flow passage communicates with the upstream passage via a communication path formed in the support member.

2. A control valve according to claim 1 , wherein the fluid flow passage is an annular passage formed on the supporting surface.

3. A control valve according to claim 2 , wherein the fluid flow passage is so formed as to be open farther radially outward than a position where the sealing member touches and leaves the valve seat.

4. A control valve according to any one of claim 3 , wherein the fluid flow passage is constituted by the ring-shaped fluid flow passage, which is so formed as to be circularly open to the supporting surface, and a communicating path that communicates between the ring-shaped fluid flow passage and the upstream passage, and
wherein the ring-shaped fluid flow passage is open farther radially outward than a position where the sealing member touches and leaves the valve seat and is open more radially inward than the engagement part.

5. A control valve according to claim 4 , the body being configured such that:
the lead-out port includes a first lead-out port and a second lead-out port,
the valve hole includes a first valve hole, which is provided between the lead-in port and the first lead-out port, and a second valve hole, which is provided between the lead-in port and the second lead-out port and which is formed coaxially with the first valve hole,
the valve seat includes a first valve seat, which is provided in an upstream-side opening end of the first valve hole, and a second valve seat, which is provided in an upstream-side opening end of the second valve hole, and
the body has a valve chamber, provided between the first valve hole and the second valve hole, where the support member is arranged, and
the valve element being configured such that:
the sealing member includes a first sealing member, which is supported by the support member in such a manner as to face the first valve seat and which opens and closes a first valve section by touching leaving the first valve seat, and a second sealing member, which is supported by the support member in such a manner as to face the second valve seat and which opens and closes a second valve section by touching leaving the second valve seat,
the first sealing member and the second sealing member are formed of material that is able to swell by absorbing the fluid in the upstream passage,
the support member includes a first fluid flow passage, which is open on a supporting surface that supports the first sealing member, and a second fluid flow passage, which is open on a supporting surface that supports the second sealing member, and
each of the first fluid flow passage and the second fluid flow passage are provided so that the second fluid flow is not blocked by the swelling of the first sealing member and so that the first fluid flow is not blocked by the swelling of the second sealing member.

6. A control valve according to claim 3 , the body being configured such that:
the lead-out port includes a first lead-out port and a second lead-out port,
the valve hole includes a first valve hole, which is provided between the lead-in port and the first lead-out port, and a second valve hole, which is provided between the lead-in port and the second lead-out port and which is formed coaxially with the first valve hole,
the valve seat includes a first valve seat, which is provided in an upstream-side opening end of the first valve hole, and a second valve seat, which is provided in an upstream-side opening end of the second valve hole, and
the body has a valve chamber, provided between the first valve hole and the second valve hole, where the support member is arranged, and
the valve element being configured such that:
the sealing member includes a first sealing member, which is supported by the support member in such a manner as to face the first valve seat and which opens and closes a first valve section by touching leaving the first valve seat, and a second sealing member, which is supported by the support member in such a manner as to face the second valve seat and which opens and closes a second valve section by touching leaving the second valve seat,
the first sealing member and the second sealing member are formed of material that is able to swell by absorbing the fluid in the upstream passage,
the support member includes a first fluid flow passage, which is open on a supporting surface that supports the first sealing member, and a second fluid flow passage, which is open on a supporting surface that supports the second sealing member, and
each of the first fluid flow passage and the second fluid flow passage are provided so that the second fluid flow is not blocked by the swelling of the first sealing member and so that the first fluid flow is not blocked by the swelling of the second sealing member.

7. A control valve according to claim 2 , wherein the fluid flow passage is constituted by the ring-shaped fluid flow passage, which is so formed as to be circularly open to the supporting surface, and a communicating path that communicates between the ring-shaped fluid flow passage and the upstream passage, and
wherein the ring-shaped fluid flow passage is open farther radially outward than a position where the sealing member touches and leaves the valve seat and is open more radially inward than the engagement part.

8. A control valve according to claim 7 , the body being configured such that:
the lead-out port includes a first lead-out port and a second lead-out port,
the valve hole includes a first valve hole, which is provided between the lead-in port and the first lead-out port, and a second valve hole, which is provided between the lead-in port and the second lead-out port and which is formed coaxially with the first valve hole,
the valve seat includes a first valve seat, which is provided in an upstream-side opening end of the first valve hole, and a second valve seat, which is provided in an upstream-side opening end of the second valve hole, and
the body has a valve chamber, provided between the first valve

Assignees

• Tgk Co Ltd

Inventors

• Shiota Toshiyuki
• Andoh Toshihiro
• Abe Shigeru

Classifications

• F16K31/0627

  with movable valve member positioned between seats · CPC title

• Y10T137/86879

  Reciprocating valve unit · CPC title

• F16K31/0624

  Lift valves · CPC title

• F16K3/02

  with flat sealing faces; Packings therefor · CPC title

• F16K31/0613

  with cylindrical slides · CPC title