GASKET TYPE ORIFICE AND PRESSURE TYPE FLOW RATE CONTROL APPARATUS FOR WHICH THE ORIFICE IS EMPLOYED

• US 20090171507A1
• Filed: 05/10/2006
• Published: 07/02/2009
• Est. Priority Date: 08/26/2005
• Status: Active Grant

• Current Assignee: Fujikin Incorporated, National University Corporation Chiba University
• Original Assignee: Fujikin Incorporated, National University Corporation Chiba University
• Inventors: Ohmi, Tadahiro, Imai, Tomokazu, Shinohara, Tsutomu, Hirose, Takashi, Sugita, Katsuyuki, Ikeda, Nobukazu, Nishino, Kouji, Dohi, Ryousuke, Nagase, Masaaki, Hirata, Kaoru, Tanaka, Hisashi, Yoshida, Toshihide
• Granted Patent: US 9,133,951 B2
• Time in Patent Office: Days
• US Class Current: 700/282
• CPC Class Codes: F16K 27/003 Housing formed from a plurality of the same valve elements
• CPC Class Codes: F16L 55/02718 placed transversely
• CPC Class Codes: G01F 1/36 the pressure or differential pressure being created by the use of flow constriction
• CPC Class Codes: G01F 15/001 Means for regulating or setting the meter for a predetermined quantity
• CPC Class Codes: G01F 15/005 Valves valves in general F16K
• CPC Class Codes: G05D 7/0635 by action on throttling means G05D7/0688, G05D7/0694 take precedence

Abstract

An orifice changeable pressure type flow rate control apparatus comprises a valve body of a control valve for a pressure type flow rate control apparatus installed between an inlet side fitting block provided with a coupling part of a fluid supply pipe and an outlet side fitting block provided with a coupling part of a fluid takeout pipe; a fluid inlet side of the valve body and the inlet side fitting block, and a fluid outlet side of the valve body and the outlet side fitting block are detachably and hermitically connected respectively so a flow passage for gases through the control valve is formed; and, a gasket type orifice for a pressure type flow rate control apparatus is removably inserted between a gasket type orifice insertion hole provided on the outlet side of the valve body and a gasket type orifice insertion hole of the outlet side fitting block.

Claims

1. A gasket type orifice device comprising:

orifice base provided with a convex portion for fitting and end faces;

a second orifice base provided with a concave portion for fitting and end faces, wherein the first orifice base and the second orifice base are connected together; and

an orifice plate provided with an orifice hole formed therein, wherein the orifice plate is hermetically inserted between first end faces of the first orifice base and the second orifice base, and second end faces of the first orifice base and the second orifice base are made to be sealing faces for the gasket type orifice device.

3. A pressure type flow rate control apparatus comprising:

a control valve disposed to control flow of a fluid through a fluid passage;

a pressure detector disposed to detect pressure in the fluid passage;

an orifice disposed in the fluid passage; and

a flow rate computation circuit and a computation control circuit operatively connected to receive pressure data from the pressure detector and to generate a flow rate control signal used to control opening and closing of the control valve, wherein the orifice is a gasket type orifice device according to claim 1.

4. A pressure type flow rate control apparatus as claimed in claim 3, wherein the control valve includes a valve body comprising

an inlet side block having an inlet side fluid flow passage formed therein;

a center block equipped with a valve seat, wherein the center block is hermetically connected to the inlet side block; and

an outlet side block having an outlet side fluid passage formed therein, wherein the outlet side block is hermetically connected to the center block.

5. A pressure type flow rate control apparatus as claimed in claim 4, further comprising an installation position for receiving the gasket type orifice device, wherein the installation position is disposed between a fluid outlet side of the center block of the control valve and a fluid inlet side of an outlet side fitting block.

9. A gasket type orifice device as claimed in claim 1, wherein the first orifice base and the second orifice base are connected together so that the first orifice base is press-fitted into the second orifice base.

2. A gasket type orifice comprising:

a short cylinder-shaped orifice base having end faces on two sides;

a brim portion projected inwardly inside and in the vicinity of one side of the short cylinder-shaped orifice base, wherein the end faces of both of the two sides of the short cylinder-shaped base are made to be sealing faces; and

a thin orifice plate provided with an orifice hole formed therein is laser welded on an outside surface of the brim portion and is fixed over an entire periphery of the thin orifice plate to the brim portion.

10. A pressure type flow rate control apparatus comprising:

a control valve disposed to control flow of a fluid through a fluid passage;

a pressure detector disposed to detect pressure in the fluid passage;

an orifice disposed in the fluid passage; and

a flow rate computation circuit and a computation control circuit operatively connected to receive pressure data from the pressure detector and to generate a flow rate control signal used to control opening and closing of the control valve, wherein the orifice is a gasket type orifice device according to claim 2.

11. A pressure type flow rate control apparatus as claimed in claim 10, wherein the control valve includes a valve body comprising

an inlet side block having an inlet side fluid flow passage formed therein;

a center block equipped with a valve seat, wherein the center block is hermetically connected to the inlet side block; and

an outlet side block having an outlet side fluid passage formed therein, wherein the outlet side block is hermetically connected to the center block.

12. A pressure type flow rate control apparatus as claimed in claim 11, further comprising an installation position for receiving the gasket type orifice device, wherein the installation position is disposed between a fluid outlet side of the center block of the control valve and a fluid inlet side of an outlet side fitting block.

6. An orifice changeable pressure type flow rate control apparatus comprising:

an inlet side fitting block equipped with a coupling portion for a fluid supply pipe;

an outlet side fitting block equipped with a coupling portion for a fluid takeout pipe;

a control valve comprising a valve body, wherein the valve body is installed between the inlet side fitting block and the outlet side fitting block, wherein a fluid inlet side of the valve body and a fluid outlet side of the inlet side fitting block, and a fluid outlet side of the valve body and a fluid inlet side of the outlet side fitting block, respectively, are hermetically and detachably connected so as to form a flow passage so one or more gases flow through to the control valve; and

a gasket type orifice device removably inserted between a gasket type orifice insertion hole provided on the fluid outlet side of the valve body and a gasket type orifice insertion hole provided on the fluid inlet side of the outlet side fitting block.

7. An orifice changeable pressure type flow rate control apparatus as claimed in claim 6, wherein the valve body of the control valve comprises

an inlet side block having an inlet side fluid passage formed therein;

a center block equipped with a valve seat, wherein the center block is hermetically connected to the inlet side block; and

an outlet side block having an outlet side fluid passage formed therein, wherein the outlet side block is hermetically connected to the center block.

8. An orifice changeable pressure type flow rate control apparatus as claimed in claim 7, wherein a pressure detector insertion hole is provided on the center block and a pressure detector is inserted in the pressure detector insertion hole so that the pressure detector is disposed to detect pressure of one or more gases flowing through the control valve.

13. An orifice changeable pressure type flow rate control apparatus comprising:

an inlet side fitting block equipped with a coupling portion for a fluid supply pipe;

an outlet side fitting block equipped with a coupling portion for a fluid takeout pipe;

a control valve comprising a valve body, wherein the valve body is installed between the inlet side fitting block and the outlet side fitting block, wherein a fluid inlet side of the valve body and a fluid outlet side of the inlet side fitting block, and a fluid outlet side of the valve body and a fluid inlet side of the outlet side fitting block, respectively, are hermetically and detachably connected so as to form a flow passage so one or more gases flow through to the control valve; and

a gasket type orifice device removably inserted between a gasket type orifice insertion hole provided on the fluid outlet side of the valve body and a gasket type orifice insertion hole provided on the fluid inlet side of the outlet side fitting block.

14. An orifice changeable pressure type flow rate control apparatus as claimed in claim 13, wherein the valve body of the control valve comprises

an inlet side block having an inlet side fluid passage formed therein;

a center block equipped with a valve seat, wherein the center block is hermetically connected to the inlet side block; and

an outlet side block having an outlet side fluid passage formed therein, wherein the outlet side block is hermetically connected to the center block.

15. An orifice changeable pressure type flow rate control apparatus as claimed in claim 14, wherein a pressure detector insertion hole is provided on the center block and a pressure detector is inserted in the pressure detector insertion hole so that the pressure detector is disposed to detect pressure of one or more gases flowing through the control valve.