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EP0224565A1 - Raccord de purge profonde pour systemes d'alimentation en gaz - Google Patents

Raccord de purge profonde pour systemes d'alimentation en gaz

Info

Publication number
EP0224565A1
EP0224565A1 EP86903866A EP86903866A EP0224565A1 EP 0224565 A1 EP0224565 A1 EP 0224565A1 EP 86903866 A EP86903866 A EP 86903866A EP 86903866 A EP86903866 A EP 86903866A EP 0224565 A1 EP0224565 A1 EP 0224565A1
Authority
EP
European Patent Office
Prior art keywords
nipple
boreholes
connecting end
gas
tubing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP86903866A
Other languages
German (de)
English (en)
Inventor
Joseph J. Okladek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Matheson Gas Products Inc
Original Assignee
Matheson Gas Products Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matheson Gas Products Inc filed Critical Matheson Gas Products Inc
Publication of EP0224565A1 publication Critical patent/EP0224565A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
    • B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
    • B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
    • B08B9/0328—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid by purging the pipe with a gas or a mixture of gas and liquid

Definitions

  • This invention relates generally to process gas supply systems and more particularly/ to a connector useful in purging the process gas from such supply systems.
  • a deep purge gas connector includes a gas nipple having a sealing end and a connecting end.
  • a pair of boreholes are provided within the gas nipple extending from the -sealing end to the connecting end. These boreholes diverge as they extend from the sealing end toward the connecting end.
  • a protrusion is provided at one or both of the locations on the connecting end where the boreholes terminate. These protrusions provide assistance in connecting the process gas and purge gas lines to the gas nipple.
  • Fig. 1 is a cross-sectional view of a deep purge connector embodying the invention prior to the welding of tubing thereto;
  • Fig. 2 shows the connecting end of the deep purge connector of Fig. 1;
  • Fig. 3 is a fragmentary cross-sectional view showing a piece of tubing butt-welded to the deep purge connector of Fig. 1;
  • Fig. 4 is a cross-sectional view of an alternate deep purge connector embodying the invention.
  • Fig. 5 is a diagram of a gas supply system utilizing the deep purge connector according to the invention.
  • the connector 10 includes a nipple 12 and a nut 14.
  • the nipple 12 has a generally cylindrical sealing end portion 15 having a rounded or semi-spherical end 16, also referred to as a bull nose, and a connecting end portion 18.
  • a pair of boreholes 20 and 22 are formed within the nipple 12 and extend generally lengthwise from the sealing end face 17 at the rounded end 16 through the connecting end face 19 of connecting end portion 18.
  • the boreholes 20 and 22 diverge from the rounded end 16 at a preselected angle relative to the longitudinal axis 24 of nipple 12. In this manner/ the terminals of boreholes 20 and 22 at the end face 19 are spaced farther apart than the terminals at sealing end face 17. It should be noted that the terminals of the two bores in the end face 17 are closely spaced proximate the center of the end face 17. Means is provided to afford connection of tubes 32 to the boreholes 20 and 22.
  • protrusions 26a and 26b are formed on the connecting end portion 18 at the locations where the boreholes 20 and 22 terminate.
  • These protrusions 26a/26b are generally cylindrical as shown in Fig. 2, and in the present instance are arranged with their cylindrical axes parallel to the nipple axis 24.
  • the protrusions 26a and 26b have central bores 28a and 28b respectively, which communicate with the terminals of boreholes 20 and 22, respectively.
  • counterbores 30a and 30b are formed in the end surfaces of protrusions 26a and 26b. These counterbores are each sufficiently deep and each have a diameter for snugly receiving a gas tubing end.
  • the bores 28a and 28b correspond in diameter to the interior diameter of the tubes 32/ and the counterbores correspond in diameter to the outside diameters of the tubes 32.
  • butt weld 34 may be formed by a conventional welding method such as heliarc welding around the circumference of the tubing/protrusion interface. In this manner/ the metal of the protrusion is fused together with the metal from the tubing/ thereby achieving an integral butt weld.
  • the presence of the protrusions 26 on the end wall limits the mass of the nipple body adjoining the site of the weld and retards the dissipation of heat during the welding operation/ thereby enhancing the fusing of the tube end with the socket formed by the counterbore 30.
  • the resulting connection is essentially particle-free since there is an absolute minimum of metal surface contact.
  • the nut 14 is rotatably engaged with nipple 12/ as shown in Fig. 1.
  • Nut 14 is used for fastening the nipple 12 to a gas cylinder valve 40.
  • Nut 14 has internal threads 42 for engaging with like threads 44 on valve 40.
  • By screwing nut 14 onto valve 40/ rounded end 16 of nipple 12 is engaged with tapered opening 46 in cylinder valve 40.
  • nipple 12 In order to avoid twisting nipple 12 during the attachment and disconnection of deep purge connector 10 to the cylinder valve 40/ nipple 12 may be provided with flats 52a and 52b in connecting end portion 18 for applying a wrench or other tool.
  • FIG. 4 there is shown an alternate embodiment of the deep purge connector according to the invention.
  • This embodiment is particularly designed for use with valves whose orifice does not accept the rounded nose 16 of the previously described embodiment.
  • a nipple 412 has a flat sealing end 416.
  • a soft (generally plastic) washer 417 is used to assure leak-proof contact between nipple 412 and the cylinder valve 440.
  • a pair of boreholes 420 and 422 divergingly extend from the sealing end 416 to a connecting end 418. It is to be noted that these holes converge at the sealing end 416 within the central opening 419 of washer 417.
  • Protrusions 426a and 426b are formed on connecting end 418 for communication with boreholes 420 and 422/ respectively.
  • the boreholes 420 and 422 diverge at a preselected angle from longitudinal axis 424 of nipple 412.
  • a nut 414 is also provided for attaching nipple 412 to a cylinder valve 440. As nut 414 is tightened on the external fitting/ it presses against shoulder 448 causing sealing end 416 to press the soft washer 417 against the flat face 441 of cylinder valve 440/ thereby providing a leakproof seal.
  • FIG. 5 shows generally a gas supply system 100 including a compressed gas cylinder 110 containing the process gas. Cylinder 110 is equipped with cylinder valve 112 which has a threaded outlet 113 to which the deep purge connector 10 is connected. A gas service line 114 is connected to the deep purge connector 10 at one of the boreholes as previously described. A purge gas supply line 120 is connected to deep purge connector 10 at the other borehole as previously described. A two-way valve 122 or other valve means is provided in gas service line 114. Valve 122 may be operated to direct the flow of gas from service line 114 either to the process supply line 124 or to a vent line 126.
  • cylinder valve 112 When it is desired to purge the gas supply system, cylinder valve 112 is first closed off, thereby shutting off the supply of process gas to the system. Next, purge gas is allowed to flow through the supply line 120 into a borehole 20 of deep purge connector 10. Two-way valve 122 is operated to direct the flow of gas into vent line 126. The purge gas flows through borehole 20, as indicated by the arrows in Fig. 1/ into the valve orifice 50 and then out through borehole 22/ sweeping any residual process gas along with it. It should be noted that the terminals of boreholes 20 and 22 are spaced apart in the end face 17 but are sufficiently close together to open directly into the orifice 50.
  • a circle circumscribing the terminals in the end face 17 is smaller than the contact diameter between the rounded end 16 of nipple 12 and the tapered opening 46 of cylinder valve 40 so that the purging gas introduced through the borehole 20 must enter the orifice 50 of the cylinder valve 40 before it can exit through the borehole 22, thereby forcing the gas out and enhancing the purging process.
  • Borehole 22 is in communication with supply line 114.
  • the purging gas is directed down the supply line 114 through valve 122, and is exhausted to a suitable purifier or collector through vent line 126. In this manner, the entire gas supply system from valve 112 through gas supply line 114 may be purged, without leaving any unpurged areas in the vicinity of cylinder valve 112.
  • the present invention provides a novel apparatus for deep purging a gas supply system.
  • the apparatus is simple to manufacture and is fabricated in a way which minimizes the generation of particles which could be introduced into the process gas stream. Additionally/ there are only two joints required to connect the pigtails to the nipple and no additional parts are required to make up the assembly. It will be recognized by those skilled in the art that changes or modifications may be made to the above-described embodiment without departing from the broad, inventive concepts of the invention.
  • a cross-purge assembly could be employed for interconnecting the process gas supply line 114/ the purge gas supply line 120 and the vent line 126/ at the connecting end portion 18 of nipple 12 to facilitate the purging procedure.
  • Such cross-purge assemblies include purge and vent ports which are perpendicular to a main gas supply port.
  • Cross-purge assemblies of this type are produced by Matheson Gas Products/ of East Rutherford/ New Jersey. It is understood/ therefore/ that the invention is not limited to the particular embodiments which are disclosed/ but is intended to cover all modifications and changes which are within the scope and spirit of the invention as defined in the appended claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Valve Housings (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

Un raccord de gaz (10) comprend un mamelon (12) percé par deux alésages (20, 22) longitudinaux. Les alésages (20, 22) s'éloignent l'un de l'autre à mesure qu'ils s'étendent de l'extrémité d'étanchéité (15) du mamelon (12) jusqu'à l'extrémité de connexion (18). Des protubérances de soudage en bout peuvent être formées à l'extrémité de connexion, en communication avec chaque alésage. Les protubérances (26a, 26b) servent à souder des tuyaux de gaz (32) au mamelon (12), aux extrémités des alésages respectifs (20, 22). Un des alésages est utilisé pour transmettre un gaz de traitement. L'autre alésage est utilisé pour introduire un gaz de purge dans le système d'alimentation en gaz (100) dont fait partie le raccord (10). L'extrémité de connexion (18) du mamelon (12) peut également être connectable à d'autres assemblages de transmission de gaz, tels que des assemblages de purge transversale.
EP86903866A 1985-05-20 1986-05-20 Raccord de purge profonde pour systemes d'alimentation en gaz Withdrawn EP0224565A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US73597685A 1985-05-20 1985-05-20
US735976 1985-05-20

Publications (1)

Publication Number Publication Date
EP0224565A1 true EP0224565A1 (fr) 1987-06-10

Family

ID=24957956

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86903866A Withdrawn EP0224565A1 (fr) 1985-05-20 1986-05-20 Raccord de purge profonde pour systemes d'alimentation en gaz

Country Status (2)

Country Link
EP (1) EP0224565A1 (fr)
WO (1) WO1986006986A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4913192A (en) * 1989-04-03 1990-04-03 Unit Instruments, Inc. Gas flow control apparatus
US5398712A (en) * 1993-05-27 1995-03-21 American Air Liquide Purgeable connection for gas cylinders
US5507534A (en) * 1994-04-29 1996-04-16 Nordson Corporation Hydraulic ball style swivel fitting
FR2831646A1 (fr) * 2001-10-30 2003-05-02 Air Liquide Procede de nettoyage d'un systeme de conditionnement et de remplissage de volumes de gaz
US7264013B2 (en) 2005-05-13 2007-09-04 Air Products And Chemicals, Inc. Enhanced purge effect in gas conduit
KR100745210B1 (ko) * 2006-05-09 2007-08-02 하이록코리아 주식회사 극저온, 고압용 볼 밸브

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2570525A (en) * 1949-09-19 1951-10-09 William J Collison Dual tap t for bathtubs set back to back
US3898861A (en) * 1973-08-20 1975-08-12 Cornelius Co Beverage dispenser
US4169486A (en) * 1977-05-06 1979-10-02 Gray William M Gas supply system with purge means
US4133347A (en) * 1977-10-31 1979-01-09 Albert Mercer Waste evacuation attachment for recreational vehicles
US4316624A (en) * 1979-11-01 1982-02-23 Davlin Irwin H Access union
US4383547A (en) * 1981-03-27 1983-05-17 Valin Corporation Purging apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8606986A1 *

Also Published As

Publication number Publication date
WO1986006986A1 (fr) 1986-12-04

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Inventor name: OKLADEK, JOSEPH, J.