GB2317216A - Sealing valve for gas bottle - Google Patents

Sealing valve for gas bottle Download PDF

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Publication number
GB2317216A
GB2317216A GB9619106A GB9619106A GB2317216A GB 2317216 A GB2317216 A GB 2317216A GB 9619106 A GB9619106 A GB 9619106A GB 9619106 A GB9619106 A GB 9619106A GB 2317216 A GB2317216 A GB 2317216A
Authority
GB
United Kingdom
Prior art keywords
valve
passage
valve member
bottle
gas
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Withdrawn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
GB9619106A
Other versions
GB9619106D0 (en
Inventor
John Bowkett
Simon Jeremy Gilbert
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.)
BSA Guns UK Ltd
Original Assignee
BSA Guns UK Ltd
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 BSA Guns UK Ltd filed Critical BSA Guns UK Ltd
Priority to GB9619106A priority Critical patent/GB2317216A/en
Publication of GB9619106D0 publication Critical patent/GB9619106D0/en
Publication of GB2317216A publication Critical patent/GB2317216A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/30—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces specially adapted for pressure containers
    • F16K1/301—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces specially adapted for pressure containers only shut-off valves, i.e. valves without additional means
    • F16K1/302—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces specially adapted for pressure containers only shut-off valves, i.e. valves without additional means with valve member and actuator on the same side of the seat
    • 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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/30—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces specially adapted for pressure containers
    • F16K1/307—Additional means used in combination with the main valve
    • 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
    • F16K25/00—Details relating to contact between valve members and seats
    • F16K25/005—Particular materials for seats or closure elements
    • 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
    • F17C13/04—Arrangement or mounting of 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
    • F17C2205/0323—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
    • F17C2205/0382—Constructional details of valves, 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/036—Very high pressure (>80 bar)
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/04—Methods for emptying or filling
    • F17C2227/048—Methods for emptying or filling by maintaining residual pressure
    • 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
    • F17C2270/00—Applications
    • F17C2270/07—Applications for household use
    • 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
    • F17C2270/00—Applications
    • F17C2270/07—Applications for household use
    • F17C2270/0745—Gas bottles

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Check Valves (AREA)

Abstract

A gas bottle or other such pressurised gas container is fitted with an openable sealing valve which in a closed condition prevents escape of gas from the bottle. The valve comprises a body 14 forming a convergent outlet passage 18 and a movable valve member 22 which in the closed condition is urged against the body to seal the passage. The valve member presents a continuous sealing edge 32 which is formed by a material (e.g. acetal resin) which is hard but sufficiently compressible to be spread slightly by compression against the body to form a seating but is insufficiently soft for it to be extruded away from the edge in repeated operation of the valve. The valve member is allowed some latitude for movement laterally of the passage, permitting self-centring of the member.

Description

SEALING VALVE FOR GAS BOTTLE This invention is concerned with improvements in or relating to valves for sealing gas bottles(or other such pressurised gas containers) in particular for bottles to be used applied to air guns.
It is important that such valves should not leak when closed, despite repeated operations of the valve and removal from the gun for storage. Whilst known constructions can provide a satisfactory seal when the valve is first applied to the bottle, it is not uncommon for known valves to become unreliable over a period of use due to deformation of material at sealing interfaces under the high gas pressures involved; typically a suitable gas bottle may be pressurised to over 3000 p.s.i.
(2.07 x 104 kPa). Materials commonly used for sealing are relatively soft materials such as neoprene and nitrile rubbers, and these materials can become extruded out of place by the gas flows during repeated use of the valve and can even move to become jammed in the outlet.
The invention provides, in one of its aspects, a gas bottle or other such pressurised gas container fitted with an openable sealing valve which in a closed condition prevents escape of gas from the bottle, the valve comprising a body forming a convergent outlet passage and a movable valve member which in the closed condition is urged against the body to seal the passage, the valve member presenting a continuous sealing edge which is formed by a material which is hard but sufficiently compressible to be spread slightly by compression against the body to form a seating but is insufficiently soft for it to be extruded away from the edge in repeated operation of the valve.
A suitable material for the valve member has been found to be a hard engineering plastics material having some degree of resilience, such as an acetal resin; Delrin (RTM) has been found to be very suitable, showing no signs of extrusion from high pressure outflows and still sealing reliably after many operations.
Most preferably the sealing edge is circular for co-operation with a convergent passage wall of conical form.
The valve member is preferably allowed some latitude for movement laterally of the passage, permitting self-centring of the member and thereby more reliable sealing over a prolonged period of use.
There now follows a description, to be read with reference to the accompanying drawing, of a bottle sealing valve and its use, which illustrates the invention by way of example.
The accompanying drawing is a view in axial section through the valve when in a closed condition.
A valve for insertion into an internally screw-threaded neck of a pressurised gas supply bottle comprises a tubular body of brass. The body comprises an inner end portion 10 which is externally screwthreaded for securement within the bottle neck, a mid-portion forming a head flange 12 which is arranged to limit insertion of the body into the neck, and an externally screw-threaded outer end portion 14 which enables the valve and bottle assembly to be coupled up to an air gun.
The valve body is bored out for most of its length from its inner end to form a cylindrical chamber 16. Within the outer end portion 14 of the body, a convergent outlet passage 18 interconnects the outer end of the chamber 16 with an outlet orifice 20 which opens out of the outer end of the body. The form of the outlet passage 18 is frusto-conical, making an included angle of 60 at the vertex of the cone.
A movable valve member 22, whereby the valve can be opened and closed, is accommodated largely within the chamber 16. The member comprises a generally cylindrical body 24 on which a flat 26 is formed to provide a gas flow passage between it and the chamber wall. A cylindrical nose 28 on the valve member projects coaxially outwards from the body 24, being of a diameter less than that of the chamber 16 but having a diameter greater than the minimum diameter of the convergent outlet passage 18. Being cylindrical, and an outer end face 30 of the nose being perpendicular to the valve member axis, a sharp circular sealing edge 32 is formed which abuts the wall of the outlet passage in the closed condition of the valve. A compression spring 34 acts between an inner end face 36 of the valve member and a support pin 38 which extends transversely through the inner end portion 10 of the valve body; the outer end of the spring is located on a cap 40 which bears against the pin. To open the valve, the nose 28 can be pushed inwards by means of a plunger inserted through the outlet orifice 20.
When the valve is fitted to a pressurised gas bottle, the valve member is urged firmly against the wall of the outlet passage 18 by means of the spring 34 together with the effect of the gas pressure within the bottle. The pressure in the bottle may typically be in excess of 3000 p.s.i. (2.07 x 104 kPa).
The valve member is made of acetal resin; a suitable material is Delrin (RTM), a hard but slightly resilient engineering plastic. Being slightly compressible, the sealing edge 32 becomes somewhat flattened against the convergent outlet passage wall, so forming a narrow seating band in engagement with the wall. However, most importantly the material is not so soft as to become extruded to any significant degree from the edge towards the outlet orifice 20, despite the high pressure gas flows which pass the edge when the valve is opened.
When the valve is in its closed condition, a good seal is maintained and substantially no escape of air occurs from the bottle, even after repeated operations of the valve. There is a small clearance around the body 24 of the valve member within the chamber 16, giving the member some latitude to move radially for self-centring of the nose 28 in the outlet passage.
A vent hole 42 is formed in the inner portion 10 of the valve body.
This safety feature ensures that should the valve be unscrewed from the bottle before the bottle is fully depressurised, residual pressure will be exhausted from the bottle before the stage is reached at which the valve could become projected from the bottle.

Claims (4)

1. A gas bottle or other such pressurised gas container fitted with an openable sealing valve which in a closed condition prevents escape of gas from the bottle, the valve comprising a body forming a convergent outlet passage and a movable valve member which in the closed condition is urged against the body to seal the passage, the valve member presenting a continuous sealing edge which is formed by a material which is hard but sufficiently compressible to be spread slightly by compression against the body to form a seating but is insufficiently soft for it to be extruded away from the edge in repeated operation of the valve.
2. A container according to claim 1 in which the material of the valve member presenting the sealing edge is a hard engineering plastics material having some degree of resilience.
3. A container according to either of claims 1 and 2 in which the sealing edge is circular for co-operation with a convergent passage wall of conical form.
4. A container according to any one of claims 1, 2 and 3 in which the valve member is allowed some latitude for movement laterally of the passage, permitting self-centring of the member.
GB9619106A 1996-09-12 1996-09-12 Sealing valve for gas bottle Withdrawn GB2317216A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9619106A GB2317216A (en) 1996-09-12 1996-09-12 Sealing valve for gas bottle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9619106A GB2317216A (en) 1996-09-12 1996-09-12 Sealing valve for gas bottle

Publications (2)

Publication Number Publication Date
GB9619106D0 GB9619106D0 (en) 1996-10-23
GB2317216A true GB2317216A (en) 1998-03-18

Family

ID=10799859

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9619106A Withdrawn GB2317216A (en) 1996-09-12 1996-09-12 Sealing valve for gas bottle

Country Status (1)

Country Link
GB (1) GB2317216A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2893994A1 (en) * 2005-11-30 2007-06-01 Air Liquide Container for storing fluid under pressure, e.g. oxygen-rich air in aircraft emergency breathing systems, has sealed inlet and plug opened by deforming one component,

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB647058A (en) * 1946-09-23 1950-12-06 Specialties Dev Corp Valve
US4186759A (en) * 1978-08-04 1980-02-05 Terminator Products, Inc. Closed system quick coupling head assembly
GB2190478A (en) * 1986-05-13 1987-11-18 Nb Marketing Co Pty Ltd Refillable gas cartridge and valve mechanism therefor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB647058A (en) * 1946-09-23 1950-12-06 Specialties Dev Corp Valve
US4186759A (en) * 1978-08-04 1980-02-05 Terminator Products, Inc. Closed system quick coupling head assembly
GB2190478A (en) * 1986-05-13 1987-11-18 Nb Marketing Co Pty Ltd Refillable gas cartridge and valve mechanism therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2893994A1 (en) * 2005-11-30 2007-06-01 Air Liquide Container for storing fluid under pressure, e.g. oxygen-rich air in aircraft emergency breathing systems, has sealed inlet and plug opened by deforming one component,
EP1793147A3 (en) * 2005-11-30 2008-03-05 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Storage device for fluid under pressure, mask and actuator comprising such a device

Also Published As

Publication number Publication date
GB9619106D0 (en) 1996-10-23

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)