Gas flow distribution system

• US 5,065,794 A
• Filed: 11/26/1990
• Issued: 11/19/1991
• Est. Priority Date: 11/26/1990
• Status: Expired due to Fees

• Current Assignee: Praxair Technology Incorporated (Linde Plc)
• Original Assignee: Union Carbide Industrial Gases Technology Corporation
• Inventors: Cheung, Steven D.
• Primary Examiner(s): Fox, John C.
• Application Number:
  US07/617,768
• Time in Patent Office: 358 Days
• Field of Search: 137/883, 137/884, 137/549
• US Class Current: 137/883
• CPC Class Codes: F17D 1/04 for distribution of gas
• CPC Class Codes: Y10T 137/8729 Having digital flow controller
• CPC Class Codes: Y10T 137/87314 Electromagnetic or electric control [e.g., digital control, bistable electro control, etc.]
• CPC Class Codes: Y10T 137/87877 Single inlet with multiple distinctly valved outlets

Abstract

Gas distribution system including main, lateral and loop conduits in which gas flow is continuously provided between a source of pressurized gas and venting means so that "dead space" is avoided in the distribution system and continuous real time monitoring of system gas is enabled.

Claims

1. A continuous flow distribution system for distributing gas or fluid to a plurality of outlets comprising

(i) supply means for continuously introducing pressurized fluid or gas into said system;

(ii) venting means downstream from said supply means for continuously receiving pressurized gas or fluid and for releasing pressurized fluid or gas from said system;

(iii) main line conduit means in communication with said supply means, said main line conduit means including in a serial relation therewith a plurality of three-port valve bodies which includes a near valve body proximate the supply means, a remote valve body, and at least one intermediate valve body in serial relation between said near and remote valve bodies, each said three-port valve body having first and second open ports which are in serial communication with each other and a third port with adjustable means for adjustably opening and closing said third port, said near valve body having an open port thereof in serial communication with said supply means;

(iv) at least one set of a plurality of lateral fluid or gas distribution conduit means for said main line conduit means including near lateral conduit means in communication with the third port of said near valve body, remote lateral conduit means in communication with an open port of said remote valve body and intermediate lateral conduit means respectively in communication with a said third port of a said intermediate valve body, each said lateral conduit means including in serial communication therewith a plurality of three-port valve bodies in a tandem array, each such three-port valve body having two open ports which are in serial communication with each other and a third port with adjustable means for adjustably opening and closing said third port for withdrawal of fluid or gas from the system, each said tandem array ending with an open port of a valve body of such array;

(v) loop conduit means for one of a said set of a plurality of lateral conduit means including in serial relation therewith a plurality of three-port valve bodies numbering one less than the number of lateral distribution conduit means of a said set, which plurality includes a near valve body proximate the near lateral conduit means, a remote valve body proximate the remote lateral conduit means and at least one intermediate valve body in serial relation between the near and remote valve bodies, each said three-port valve body of said plurality having two open ports which are in serial communication with each other and a third port with adjustable means for adjustably opening and closing said third port;

said near valve body of said loop conduit means having a said open port in serial communication with a said open port of the valve body ending the tandem array of the near lateral conduit means, said remote valve body of said loop conduit means having a said open port in serial communication with said vent means, and the third port of each of the valve bodies in the loop conduit means being respectively in serial communication with a said open port of a valve body ending the tandem array of the remote and intermediate lateral conduit means.

2. A system in accordance with claim 1 in which;

(i) additional one or more three-port valve bodies are included in serial relation from upstream to downstream in the main conduit means being located respectively adjacently downstream of the pre-existing three-port valve bodies of said conduit means, each said three-port valve body having first and second open ports in serial communication with each other and a third port with adjustable means for adjustable opening and closing said third port;

(ii) additional separate lateral conduit means in communication with a said third port of each said additional three-port valve body, each said additional lateral conduit means including in serial communication therewith a plurality of three-port valve bodies in a tandem array, each valve body having two open ports in serial communication with each other and a third port with adjustable means for adjustable opening and closing said third port for withdrawal of fluid or gas from the system, each said tandem array ending with an open port of a valve body of such array;

(iii) an additional loop conduit means including in serial relation therewith one or more three-port valve bodies numbering one less than the number of said additional lateral distribution conduit means which includes an upstream valve body proximate the most upstream additional lateral conduit means, a downstream valve body proximate the most downstream lateral conduit means and one or more intermediate valve bodies in serial relation between the upstream and downstream valve bodies, each said three-port valve body having two open ports which are in serial communication with each other and a third port with adjustable means for adjustably opening and closing said third port;

said upstream valve body of said additional loop conduit means having a said open port in serial communication with a said open port of the valve body ending the tandem array of the upstream lateral conduit means, said downstream valve body of said additional loop conduit means having a said open port in serial communication with said venting means, and the third port of each of the valve bodies in the additional loop conduit means being respectively in serial communication with a said open port of a valve body ending the tandem array of the downstream and intermediate lateral conduit means.

3. A system in accordance with claim 1 wherein a back pressure regulating means is included in each lateral conduit in communication with the open port venting the tandem array of such lateral conduit means and the port of the respective valve body of the additional loop conduit means which is in serial communication with said open port ending such tandem array.

4. A system in accordance with claim 1 wherein sample conduit means are provided in communication with said venting means for providing a bleed of a continuous sample of the stream of the gas or fluid continually released from the system.

5. A system in accordance with claim 1 wherein the venting means includes valve means for alternately releasing pressurized gas or fluid to the atmosphere or to purification means.

6. A system in accordance with claim 1 wherein a first two-way valve is in serial communication between the open port of the remote valve body and the remote lateral conduit means and a second two-way valve is in serial communication between the open port of the near valve body and the open port of the valve body and the open port of the valve body ending the tandem array of the near lateral conduit means.

7. A continuous flow distribution system for distributing gas or fluid to a plurality of outlets comprising

(i) supply means for continuously introducing pressurized fluid or gas into said system;

(ii) venting means downstream from said supply means for continuously receiving pressurized gas or fluid and for releasing pressurized fluid or gas from said system;

(iii) main line conduit means in communication between said supply means and said venting means;

(iv) loop conduit means in communication between said supply means and said venting means;

(v) lateral conduit means in communication from said main conduit means to said loop conduit means;

(vi) a plurality of outlet valve means in said lateral conduit means each said outlet valve means having first and second ports which are in serial communication with each other and a third port with adjustable means for adjustably opening and closing said third port.

8. Method for providing continuous gas or fluid flow from a supply of pressurized gas or liquid through a main line to a vent to a lower pressure than the main line pressure and to lateral conduits branching from the main line having ends remote from the main line and having adjustably openable outlets for the supply of pressurized gas or liquid;

said method comprising

(i) passing pressurized gas or fluid through the main line from the supply or pressurized gas to a vent and from the vent to a lower pressure environment than the main line;

(ii) providing pressurized gas or fluids from the mainline to the laterals including the remote ends of the laterals; and

(iii) providing a path joining the ends of the laterals for the flow of pressurized gas or fluid from the end of each lateral to the vent.