EP0556028A1 - Ventil, insbesondere für Feuerlöscher - Google Patents

Ventil, insbesondere für Feuerlöscher Download PDF

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Publication number
EP0556028A1
EP0556028A1 EP93300947A EP93300947A EP0556028A1 EP 0556028 A1 EP0556028 A1 EP 0556028A1 EP 93300947 A EP93300947 A EP 93300947A EP 93300947 A EP93300947 A EP 93300947A EP 0556028 A1 EP0556028 A1 EP 0556028A1
Authority
EP
European Patent Office
Prior art keywords
bore
connecting member
fluid
assembly
assembly according
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.)
Ceased
Application number
EP93300947A
Other languages
English (en)
French (fr)
Inventor
Derek Potter
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.)
TG Products Ltd
Original Assignee
Thorn EMI PLC
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 Thorn EMI PLC filed Critical Thorn EMI PLC
Publication of EP0556028A1 publication Critical patent/EP0556028A1/de
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C13/00—Portable extinguishers which are permanently pressurised or pressurised immediately before use
    • A62C13/62—Portable extinguishers which are permanently pressurised or pressurised immediately before use with a single permanently pressurised container
    • A62C13/64—Portable extinguishers which are permanently pressurised or pressurised immediately before use with a single permanently pressurised container the extinguishing material being released by means of a valve

Definitions

  • the present invention relates to an assembly for the controllable passage of fluid therethrough and has particular, although no exclusive, relevance to an assembly for use with fire extinguishers.
  • Conventional fire extinguishers generally comprise a cylindrical body containing the extinguishant material under pressure, and a valve portion which allows release of the extinguishant towards fire under manual operation.
  • a fire extinguisher is disclosed, for example, in US patent number 4,862,968.
  • One common style of fire extinguisher has a divergent horn section coupled to the nozzle in the valve portion via a screw tread.
  • the purpose of the horn section is generally to provide a divergent stream of extinguishant material. This serves firstly to enable the operator to cover a wider area of the fire with the material, and secondly to reduce the impact energy of the material onto the seat of the fire.
  • the latter provision will be appreciated because if, for example, the seat of the fire is a liquid, then an intense stream of extinguishant material striking the liquid may cause the liquid to splash and the fire to spread.
  • the horn section type extinguisher if the horn section is not coupled fast to the valve portion, then if the extinguishant material is released under sufficient pressure, the coupling may become untenable and the horn assembly be projected dangerously rapidly away from the fire extinguisher.
  • an assembly for the controllable passage of fluid therethrough comprising: a body portion defining a through-bore and; a pressure-releasable means disposed within the through-bore for enabling or preventing passage of fluid through the through-bore; characterised by a further bore having two open ends and which face in opposite directions arranged to communicate with the through-bore at a position between the two open ends; and a connecting member for axial engagement with the further bore, the connecting member defining first and second portions for engagement within the further bore, and further defining, between the first and second portions, a conduit for allowing the flow of fluid from the through-bore through the connecting member.
  • the connecting member determines the direction of fluid flow on exiting the valve assembly.
  • the connecting member may be arranged to form any suitable type of nozzle, such as a conical horn.
  • the connecting member has formed, between the first and second portions, a recess in which the conduit is formed.
  • the present invention also provides a connecting member for use with such an assembly, the connecting member defining first and second portions for engagement within the further bore, and further defining, between the first and second portions, a conduit for allowing the flow of fluid from the through-bore through the connecting member.
  • FIG. 1 illustrates that an assembly in accordance with the present invention includes a body portion 2.
  • the body portion 2 is manufactured as a brass moulding, although any method of manufacture and suitable material may alternatively be employed.
  • the criteria to be met by the body portion 2 is that it must be sufficiently sturdy to withstand operation under such pressure as is exerted by extinguishant fluid (not shown).
  • the body portion 2 defines a through-bore 4 within which is disposed a pressure-releasable means in this example a spindle valve shown generally as 6.
  • the spindle valve 6 includes a spindle 8 communicating with a valve seal 10 via a washer 12.
  • a bursting disc arrangement 14 is held in engagement with the spindle by a nut 16.
  • spring 18 and spring retaining nut 20 When the spindle valve 6 is seated within the through-bore 4, it is held in resilient engagement therewith by spring 18 and spring retaining nut 20.
  • the nut 20 and body portion 2 have threads provided to enable a locking engagement therebetween.
  • Reference also to figures 2 and 3 illustrates more clearly the cooperation of spindle valve 6 with the body portion 2.
  • the lower end of the body portion 2, with which nut 20 engages, is arranged to form a threaded spigot onto which may be screwed a cylinder (not shown) containing fire extinguishant fluid under pressure. It will be apparent that both the force of spring 18 and the pressure exerted by the extinguishant fluid act to urge the spindle 8 in an upward direction as shown in the figures such that the seal 10 is in close contact with the inner wall of through-bore 4 such that the spindle valve 6 is "closed", that is no extinguishant fluid may flow through the through-bore 4.
  • the bore 22 is an open bore which communicates with the through-bore 4 at a position between the ends of the bore 22.
  • extinguishant fluid will flow via the through-bore 4 and further bore 22 and exit the assembty in two opposite directions, the effect of this being that the net reaction on the assembly caused by two equal and opposite discharges will be negligible.
  • the extinguishant fluid is chosen to be carbon dioxide in liquid and/or gas phase, then a vapour pressure of around 8.8x106 Pa is not uncommon at room temperature. It will be appreciated that if only one exit port were available for the escape of fluid, as is the case with hitherto known extinguishers, then a substantial reaction could be generated by the release of fluid. With a typical carbon dioxide fire extinguisher weighing in the order of 5kg when full, such reaction may easily cause physical harm to an unwary operator.
  • a connecting member in this example, cylindrical discharge horn connector 26 arranged to fit within the bore 22 in axial engagement therewith.
  • the connector 26 has first and second portions such as annular seats 28 which provide mountings for O-rings 30 such that when connector 26 is situated within the bore 22, the O-rings 30 form a tight seal between the periphery of both ends of connector 26 and the inner wall of bore 22.
  • the connector 26 is able to swivel about its axis within bore 22.
  • Connector 26 has formed within it and situated between annular seats 28 thereof a recess 31 in which is formed conduit, in this, example through-bore 32.
  • the through-bore 32 is open-ended such that one end communicates with the through-bore 4 via bore 22 and the other end answers to atmospheric pressure.
  • a locking assembly 34 is provided for the assembly, but it will be appreciated that should the locking assembly 34 become accidently detached, safe operation of the assembly is possible. Any suitable locking engagement to hold connector 26 within bore 22 will be effective.
  • the direction of exit of the extinguishant fluid via the connector 26 may be governed by providing the end of the connector 26 remote from the bore 22 with a divergent conical horn 36.
  • a bursting disc arrangement 14 will be described in further detail. It will be appreciated by those skilled in the art that the purpose of such a bursting disc arrangement 14 is to provide a safety mechanism in any situation where material is held under increased pressure. In adverse conditions, such as greatly elevated temperatures, such material will tend to expand. However, because, as in the present example, the extinguishant material is contained within a cylinder (not shown), then it is possible that the cylinder could rupture or even explode. To avoid such a situation, a bursting disc arrangement 14 is employed such that the pressure of the contained extinguishant exceeds a predetermined amount, the disc ruptures and the extinguishant material escapes safely via the ruptured disc.
  • the bursting disc arrangement 14 which is important. Unlike known bursting disc arrangements, the bursting disc arrangement 14 of the current construction is clamped between spindle 8 and nut 16, such that if the disc should rupture, the passage for the extinguishant material to exit the assembly is via spindle 8 and port 38 therein and hence on via bore 22. Thus it will be seen that by employing such a bursting disc arrangement 14 located as detailed in the drawings, the discharge of extinguishant both of a controlled and an uncontrolled nature occur via the same routes, i.e. bore 22.
  • fluid as utilised in the above description is apt to cover such materials as may be employed in any of the liquid, gas, powder and the like phases.
  • the basic requirement for such materials is an ability to be fluent within the assembly.
  • any such assembly designed to operate under pressure advantageously includes such a safety feature.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Safety Valves (AREA)
EP93300947A 1992-02-13 1993-02-10 Ventil, insbesondere für Feuerlöscher Ceased EP0556028A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9203040 1992-02-13
GB9203040A GB2264155A (en) 1992-02-13 1992-02-13 Swivellable assembly for the controllable passage of fluid therethrough

Publications (1)

Publication Number Publication Date
EP0556028A1 true EP0556028A1 (de) 1993-08-18

Family

ID=10710318

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93300947A Ceased EP0556028A1 (de) 1992-02-13 1993-02-10 Ventil, insbesondere für Feuerlöscher

Country Status (2)

Country Link
EP (1) EP0556028A1 (de)
GB (1) GB2264155A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1510235A1 (de) * 2003-08-27 2005-03-02 KIDDE-DEUGRA Brandschutzsysteme GmbH Feuerlöscheinrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH444204A (de) * 1964-08-17 1967-09-30 Reynolds Tube Company Limited Behälter für verflüssigte oder komprimierte Medien
US3389753A (en) * 1965-12-30 1968-06-25 Automatic Sprinkler Corp Swivel tube connection for fire extinguishers
GB2062104A (en) * 1979-11-01 1981-05-20 Commw Ind Gases Pressure vessel safety valve
DE8621035U1 (de) * 1986-08-06 1986-12-18 R. & G. Schmöle Metallwerke GmbH & Co KG, 5750 Menden Berstscheiben-Überdrucksicherung für Druckgasbehälter
US4805701A (en) * 1987-04-07 1989-02-21 Mountford George S Fire extinguisher and alarm apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1022572A (en) * 1963-03-25 1966-03-16 Andre Georges Jamme Improvements in or relating to pipe connectors
US4672998A (en) * 1985-04-09 1987-06-16 San Diego Gas & Electric Hydraulic swivel connector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH444204A (de) * 1964-08-17 1967-09-30 Reynolds Tube Company Limited Behälter für verflüssigte oder komprimierte Medien
US3389753A (en) * 1965-12-30 1968-06-25 Automatic Sprinkler Corp Swivel tube connection for fire extinguishers
GB2062104A (en) * 1979-11-01 1981-05-20 Commw Ind Gases Pressure vessel safety valve
DE8621035U1 (de) * 1986-08-06 1986-12-18 R. & G. Schmöle Metallwerke GmbH & Co KG, 5750 Menden Berstscheiben-Überdrucksicherung für Druckgasbehälter
US4805701A (en) * 1987-04-07 1989-02-21 Mountford George S Fire extinguisher and alarm apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1510235A1 (de) * 2003-08-27 2005-03-02 KIDDE-DEUGRA Brandschutzsysteme GmbH Feuerlöscheinrichtung

Also Published As

Publication number Publication date
GB9203040D0 (en) 1992-03-25
GB2264155A (en) 1993-08-18

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