WO1995034777A1 - Tige de securite gaziere '501' - Google Patents

Tige de securite gaziere '501' Download PDF

Info

Publication number
WO1995034777A1
WO1995034777A1 PCT/NZ1994/000059 NZ9400059W WO9534777A1 WO 1995034777 A1 WO1995034777 A1 WO 1995034777A1 NZ 9400059 W NZ9400059 W NZ 9400059W WO 9534777 A1 WO9534777 A1 WO 9534777A1
Authority
WO
WIPO (PCT)
Prior art keywords
safety
cylinder
stem
gas
regulator
Prior art date
Application number
PCT/NZ1994/000059
Other languages
English (en)
Inventor
Lee Louis Schatz
Original Assignee
Multigas Welding Services Limited
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 Multigas Welding Services Limited filed Critical Multigas Welding Services Limited
Priority to NZ267718A priority Critical patent/NZ267718A/en
Priority to AU70096/94A priority patent/AU693794B2/en
Priority to PCT/NZ1994/000059 priority patent/WO1995034777A1/fr
Publication of WO1995034777A1 publication Critical patent/WO1995034777A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/40—Safety valves; Equalising valves, e.g. pressure relief valves with a fracturing member, e.g. fracturing diaphragm, glass, fusible joint
    • F16K17/406—Safety valves; Equalising valves, e.g. pressure relief valves with a fracturing member, e.g. fracturing diaphragm, glass, fusible joint the fracturing member being a generally elongated member, e.g. rod or wire, which is directly connected to a movable valve member, the breaking or buckling of the elongated member allowing the valve member to move to a closed or open position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L35/00—Special arrangements used in connection with end fittings of hoses, e.g. safety or protecting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/10—Means for stopping flow from or in pipes or hoses
    • F16L55/1015—Couplings closed automatically when disengaging force exceeds preselected value
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0332—Safety valves or pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0338—Pressure regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0388—Arrangement of valves, regulators, filters
    • F17C2205/0394—Arrangement of valves, regulators, filters in direct contact with the pressure vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/03—Dealing with losses
    • F17C2260/035—Dealing with losses of fluid
    • F17C2260/036—Avoiding leaks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/04—Reducing risks and environmental impact
    • F17C2260/042—Reducing risk of explosion

Definitions

  • the invention relates to a gas safety stem and more particularly to a safety stem for a gas regulator, incorporating a safety valve.
  • High pressure gas cylinders are often used in industry and elsewhere. They can however be dangerous and lead to industrial accidents. For example, if an accident occurs and the regulator is smashed off the cylinder (for example, the cylinder may fall over) , the cylinder becomes a missile due to the escaping gas. Also there is a risk of explosion from the gas.
  • the invention provides a safety stem adapted to be attached directly or indirectly between a gas cylinder and a regulator of the gas cylinder, the safety stem adapted to shut off a flow of gas from the cylinder to the regulator when the regulator is smashed off the cylinder, regardless of the pressure differential between the cylinder interior and the external atmosphere.
  • the safety stem comprises a retaining means adapted to prevent a safety valve from closing when the cylinder is in its normal position prior to an accident.
  • the safety valve is forced shut thus preventing gas escaping from the cylinder to the outside atmosphere.
  • the retaining means compresses a biasing means and on release of the retaining means, the biasing means is also released and expands to force the safety valve shut.
  • the biasing means is preferably a spring.
  • the safety valve may comprise a ball and socket with a channel for gas flow extending from the socket, and wherein the ball, on the release of the biasing means is adapted to be forced into the socket thus sealing the channel and preventing gas flow therethrough from the cylinder to the external atmosphere.
  • the retaining means may be a retaining pin adapted to lie along the length of the channel between a stop at the external end of the safety stem and the safety valve.
  • a stop may retain the retaining pin in the channel, forcing the retaining pin to compress the biasing means in the normal position.
  • the retaining means comprises a break point such that on breakage of the retaining means at the break point, the retaining means is released from the safety stem, which in turn releases the biasing means which in turn forces the safety valve closed, preventing gas flow from the cylinder into the channel.
  • a nut may be positioned between the safety valve and the biasing means.
  • the safety stem comprises fixing means to secure it to a regulator and/or a cylinder, and/or a cylinder valve.
  • the invention also provides a regulator comprising a safety stem as defined above.
  • the invention also provides a method of preventing escape of gas from a gas cylinder in the event of an accident occurring which removes a regulator from the gas cylinder.
  • Figure 1 is a cross sectional side view of the safety stem.
  • the soft seat 4 is designed to attach to a cylinder valve (not shown) which in turn is designed to attach to a cylinder of gas (not shown) .
  • a stainless steal spring 6 is coiled in a cavity 7 between the safety seat 4 and a first side of a small brass nut 8.
  • On the opposite side of the brass nut 8 is a stainless steel ball 10.
  • the stainless steel ball 10 sits between the brass nut 8 and a valve seat 12.
  • the valve seat 12 extends from the brass nut 8 into a long, narrow channel 14.
  • the neck of the valve seat 12 is narrower at the point at which it extends into the channel 14.
  • the channel 14 extends towards a regulator (not shown), terminating in a stainless steel filter 16.
  • a brass retaining pin 18 Extending through the channel 14 is a brass retaining pin 18.
  • a safety break point 20 Approximately midway along the retaining pin 18 is a safety break point 20.
  • attachment means such as screw threads 22 designed to secure the safety stem 2 to the cylinder valve (not shown) and the regulator (not shown) .
  • gas enters from a cylinder (not shown) through a cylinder valve (not shown) and into the safety stem 2 via the soft seat 4.
  • the stainless steel spring 6 In its normal position, prior to an accident, the stainless steel spring 6 is compressed. Hence gas is able to flow through the cavity 7 in the safety stem 2, around the stainless steel ball 10 and through the channel 14 to the outside.
  • the stainless steel ball 10 is prevented from pushing against the valve seat 12 and blocking the channel 14 by the brass retaining pin 18 which exerts a backwards pressure on the stainless steel ball 10. This backwards pressure is exerted via the brass nut 8 onto the stainless steel spring 6, thus maintaining the stainless steel spring 6 in a coiled position.
  • the safety stem 2 need not be adapted to sit between the regulator and the cylinder valve.
  • the safety stem 2 could be used on the opposite side of the cylinder valve, that is, between the cylinder valve and the cylinder itself.
  • the components of the safety stem 2 may be made out of any suitable material, and are not restricted to stainless steel and brass.
  • the safety stem has numerous advantages. For example, in the event of an accident smashing off the regulator from a gas cylinder, it:
  • the safety stem according to the invention will find wide use in industry were gas cylinders are used. Use of the safety stem will help prevent industrial accidents.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

La présente invention concerne une tige de sécurité à point de rupture et une soupape de sécurité permettant d'empêcher l'échappement des gaz lorsqu'un organe de régulation est arraché d'une bonbonne à gaz. La soupape de sécurité se compose, d'une part, d'un ressort (6) placé entre un siège (4) et un écrou (8) déterminant une cavité (7) et, d'autre part, d'une bille (10) qui est située entre l'écrou (8) et le siège de soupape (12) et qui est maintenue en position ouverte dans un canal (14) au moyen d'une broche de retenue (18). En cas d'accident, la tige de sécurité (2) se brise au niveau du point de rupture (20), libérant ainsi la bille (10) qui vient se caler hermétiquement contre le siège de soupape (12).
PCT/NZ1994/000059 1994-06-13 1994-06-13 Tige de securite gaziere '501' WO1995034777A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NZ267718A NZ267718A (en) 1994-06-13 1994-06-13 Safety valve for gas cylinder: cuts off gas flow if regulator valve is sheared off
AU70096/94A AU693794B2 (en) 1994-06-13 1994-06-13 501 gas safety stem
PCT/NZ1994/000059 WO1995034777A1 (fr) 1994-06-13 1994-06-13 Tige de securite gaziere '501'

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/NZ1994/000059 WO1995034777A1 (fr) 1994-06-13 1994-06-13 Tige de securite gaziere '501'

Publications (1)

Publication Number Publication Date
WO1995034777A1 true WO1995034777A1 (fr) 1995-12-21

Family

ID=19916321

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NZ1994/000059 WO1995034777A1 (fr) 1994-06-13 1994-06-13 Tige de securite gaziere '501'

Country Status (2)

Country Link
AU (1) AU693794B2 (fr)
WO (1) WO1995034777A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2446483A (en) * 2006-12-13 2008-08-13 Yi-Jhih Bai Safety device
ITMI20100969A1 (it) * 2010-05-28 2011-11-29 Helite S A R L Dispositivo per gonfiare airbag
JP2015121313A (ja) * 2013-11-20 2015-07-02 矢崎エナジーシステム株式会社 ガス漏洩抑制アダプタ
CN112066056A (zh) * 2020-07-31 2020-12-11 清华大学 安全断流阀

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU243536A (en) * 1936-06-17 1937-07-29 Improvements in or relating to cut out valves particularly for use in the control of the flow of fluids in conduits
US3630214A (en) * 1970-01-02 1971-12-28 Aeroquip Corp Frangible coupling
US3665946A (en) * 1970-08-10 1972-05-30 Milwaukee Valve Co Inc Tank truck safety valve
US3874428A (en) * 1973-08-08 1975-04-01 Charles R Golay Remote fill system for L-P gas cylinder
US3916929A (en) * 1974-08-16 1975-11-04 Scovill Manufacturing Co Self-sealing break-away fitting
US4064889A (en) * 1976-02-17 1977-12-27 Sun Oil Company Of Pennsylvania Break-away safety valve
US4077422A (en) * 1975-11-17 1978-03-07 Said Robie G. Brinkley, By Said Gerry D. Welton Flow control means for compressed gas cylinders
US4562852A (en) * 1984-08-20 1986-01-07 Britt Franklin J Safety valve
US4762140A (en) * 1987-05-28 1988-08-09 Davis Edward A Snap-off plug valve
US4886087A (en) * 1988-09-19 1989-12-12 Garret Kitchen Fuel spill prevention valve
CH672669A5 (en) * 1987-06-04 1989-12-15 Felix Buechel Gas safety valve for pressurised gas canisters - consists of housing with guide piece for pin, with piston

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU243536A (en) * 1936-06-17 1937-07-29 Improvements in or relating to cut out valves particularly for use in the control of the flow of fluids in conduits
US3630214A (en) * 1970-01-02 1971-12-28 Aeroquip Corp Frangible coupling
US3665946A (en) * 1970-08-10 1972-05-30 Milwaukee Valve Co Inc Tank truck safety valve
US3874428A (en) * 1973-08-08 1975-04-01 Charles R Golay Remote fill system for L-P gas cylinder
US3916929A (en) * 1974-08-16 1975-11-04 Scovill Manufacturing Co Self-sealing break-away fitting
US4077422A (en) * 1975-11-17 1978-03-07 Said Robie G. Brinkley, By Said Gerry D. Welton Flow control means for compressed gas cylinders
US4064889A (en) * 1976-02-17 1977-12-27 Sun Oil Company Of Pennsylvania Break-away safety valve
US4562852A (en) * 1984-08-20 1986-01-07 Britt Franklin J Safety valve
US4762140A (en) * 1987-05-28 1988-08-09 Davis Edward A Snap-off plug valve
CH672669A5 (en) * 1987-06-04 1989-12-15 Felix Buechel Gas safety valve for pressurised gas canisters - consists of housing with guide piece for pin, with piston
US4886087A (en) * 1988-09-19 1989-12-12 Garret Kitchen Fuel spill prevention valve

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2446483A (en) * 2006-12-13 2008-08-13 Yi-Jhih Bai Safety device
GB2446483B (en) * 2006-12-13 2011-11-23 Yi-Jhih Bai Safety flow guide protection device
ITMI20100969A1 (it) * 2010-05-28 2011-11-29 Helite S A R L Dispositivo per gonfiare airbag
WO2011148351A1 (fr) * 2010-05-28 2011-12-01 Helite S.A.R.L. Dispositif pour gonfler un airbag
JP2015121313A (ja) * 2013-11-20 2015-07-02 矢崎エナジーシステム株式会社 ガス漏洩抑制アダプタ
CN112066056A (zh) * 2020-07-31 2020-12-11 清华大学 安全断流阀
CN112066056B (zh) * 2020-07-31 2021-07-16 清华大学 安全断流阀

Also Published As

Publication number Publication date
AU693794B2 (en) 1998-07-09
AU7009694A (en) 1996-01-05

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