EP3660382A1 - Soupape d'arrêt, en particulier pour extincteurs à eau portables - Google Patents

Soupape d'arrêt, en particulier pour extincteurs à eau portables Download PDF

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Publication number
EP3660382A1
EP3660382A1 EP19210790.2A EP19210790A EP3660382A1 EP 3660382 A1 EP3660382 A1 EP 3660382A1 EP 19210790 A EP19210790 A EP 19210790A EP 3660382 A1 EP3660382 A1 EP 3660382A1
Authority
EP
European Patent Office
Prior art keywords
valve
ring nut
tank
extinguishing
shut
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.)
Granted
Application number
EP19210790.2A
Other languages
German (de)
English (en)
Other versions
EP3660382B1 (fr
Inventor
Leonardo Claudio Leo
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.)
Bridgeport SpA
Original Assignee
Bridgeport Srl
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 Bridgeport Srl filed Critical Bridgeport Srl
Publication of EP3660382A1 publication Critical patent/EP3660382A1/fr
Application granted granted Critical
Publication of EP3660382B1 publication Critical patent/EP3660382B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C13/00—Portable extinguishers which are permanently pressurised or pressurised immediately before use
    • A62C13/76—Details or accessories

Definitions

  • the subject of the present invention is a shut-off valve for fire extinguishers, in particular for pushbutton or portable fire extinguishers. More particularly, the invention is applicable to so-called water extinguishers, which use water with suitable additives, as an extinguishing agent, or other extinguishing mixtures.
  • Water extinguishers consist of a steel sheet tank which, due to the high corrosivity of the extinguishing agent, are coated internally with a protective layer of plastic material or are in stainless steel to prevent corrosion thereof.
  • valves normally used on such extinguishers are of the screw type, i.e. they have a male thread that engages with a female thread provided at the mouth of the extinguishing agent tank, where obviously the protective layer cannot be provided.
  • DE 3610855 A1 describes an overpressure safety valve, which automatically intervenes in the case wherein the pressure inside the container on which it is applied exceeds a limit value.
  • the valve body is fixed to a ring nut that is mounted on the mouth of the container protruding inside it.
  • the seal of the valve is obtained by means of a gasket that works by compression, whose correct functioning is guaranteed by not bringing the valve body to abut against said ring nut.
  • valve would not be usable on water extinguishers, or in any case containing corrosive extinguishing substances, as it is not a manually operable shut-off valve, and the protrusion of the ring nut inside the container would not allow the continuous coating of the entire internal surface of the container in contact with the corrosive substance with a protective layer.
  • the object of the invention is to eliminate the disadvantages of the prior art described above.
  • an object of the invention is to provide a shut-off valve for water extinguishers that prevents possible corrosion of the means of fixing the valve to the tank due to contact with the highly corrosive extinguishing substance.
  • Another object of the invention is to provide such a valve that can be assembled automatically.
  • Another object is to allow the positioning of the valve in a univocal and repeatable way with respect to the position of the tank.
  • Yet another object of the invention is to provide such a shut-off valve for fire extinguishers that is simple and economical to manufacture.
  • shut-off valve for water extinguishers according to the invention that has the features of the appended independent claim 1.
  • the shut-off valve particularly for portable water fire extinguishers, or in any case containing corrosive extinguishing substances, comprises a valve-body that can be fixed to a ring nut welded to the mouth of an upper dome of a tank containing the corrosive extinguishing substance, wherein said valve-body has a base flange that can be fixed by screws to said ring nut having below a step that inserts in said mouth and has a height not higher than the thickness of the wall of the tank so as not to protrude internally to the tank.
  • Said flange abuts against the upper edge of the ring nut and said screws screw into threaded holes provided in the ring nut.
  • Said valve-body has below a cylindrical shank that inserts inside said ring nut.
  • valve for fire extinguishers particularly portable water extinguishers, according to the invention, is denoted by reference numeral 1 and, in Figures 1 and 2 , is shown mounted on a tank 100, of which only the upper part having a dome 101 is shown.
  • Valve 1 which, with regard to its structure and functioning, can be considered substantially known, comprises an internally hollow valve-body 2, in which a small piston 3 is housed that normally keeps the valve closed ( Figure 5 ), stopping the flow of extinguishing agent from a lower entry opening 4 to a lateral opening of exit 5 from the valve-body 2.
  • Piston 3 has a head 6 with a conical gasket 7 that abuts, from below upwards, against a tapered seat 8 formed in the valve-body.
  • Piston 3 is pushed upwards by a spring 9 acting between a shoulder 10 formed inside the valve-assembly and an upper closing cover 11 of piston 3, which abuts against a lever 12, pivoted around a pin 13.
  • a second lever 14 is placed, in a substantially fixed position, to allow gripping thereof by a user, so as to lower the lever 12 in contrast to the action of spring 9 to actuate the valve in opening, as shown in Figure 6 .
  • lever 12 When not in use, lever 12 is kept in position locked by a pin, not shown, inserted in aligned holes 15 provided in levers 12 and 14, pin that must obviously be removed when using the fire extinguisher.
  • a gasket 16 is also provided that seals against the internal cavity of the valve-body 2 at a height higher than the exit opening 5 of the extinguisher, designed to prevent leakage of fluid upwards, both in the phase of delivery of the extinguishing agent and during filling of the tank, which occurs through the same opening 5.
  • valve structure described can be considered substantially in itself known.
  • the feature of the invention lies in the way in which the valve is fixed to the tank 100, or better to a ring nut 20 that is usually welded to the mouth 102 ( Figures 2 and 2a ) of the dome 101 of the tank 100.
  • valve-body 2 is provided with a base flange 23 which abuts against the upper edge 29 of the ring nut 20 and is fixed thereto by means of at least two screws 24, which are screwed into threaded holes 30 provided in the ring nut.
  • a short cylindrical shank 25 protrudes below from the valve-body 2 and is placed inside the ring nut 20.
  • a sealing gasket 26 is interposed, in particular an O-ring.
  • the gasket 26 thus placed on the bevel 27 of the inner edge of the ring nut 20 therefore works in mechanical abutment, with the base flange 23 of the valve body that abuts against the upper edge 29 of the ring nut 20 avoiding any possibility of air entering the tank 100.
  • the ring nut 20 has below a step 28 which inserts in the mouth 102 of the tank 100 and has a height not higher than the thickness of the wall of the tank so as not to protrude into it.
  • the absence of protruding parts inside the tank 100 allows covering with continuity of its internal surface with a protective layer of plastic material 105 that also covers the internal surface of the ring nut 20 up to its bevelled inner sealing edge 27, as shown in Fig. 2a . This is necessary in order to avoid corrosion of the tank and of the valve body, given the high corrosivity of the liquid contained.
  • the fixing solution according to the invention is also competitive since it reduces the cost of the threaded ring nut of the tank and that of the turn lock for the male thread solution of the ring nut.
  • commercial steel screws can be used at a low cost.
  • the threadless ring nut in the solution according to the invention allows automated positioning and tightening of the screws 24 by robot.
  • the positioning of valve 1 on tank 100 is also easily automated.
  • the position/coordinates of the threaded holes 30 on the ring nut on which to position and tighten the screws 24 are identified and defined, without having to rotate the valve and use complex screwdrivers to screw it onto the tank, in the case of valves with male thread.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Lift Valve (AREA)
  • Preventing Unauthorised Actuation Of Valves (AREA)
  • Fluid-Driven Valves (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)
EP19210790.2A 2018-11-28 2019-11-21 Soupape d'arrêt, en particulier pour extincteurs à eau portables Active EP3660382B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102018000010662A IT201800010662A1 (it) 2018-11-28 2018-11-28 Valvola di intercettazione particolarmente per estintori idrici portatili

Publications (2)

Publication Number Publication Date
EP3660382A1 true EP3660382A1 (fr) 2020-06-03
EP3660382B1 EP3660382B1 (fr) 2023-11-01

Family

ID=65576522

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19210790.2A Active EP3660382B1 (fr) 2018-11-28 2019-11-21 Soupape d'arrêt, en particulier pour extincteurs à eau portables

Country Status (4)

Country Link
EP (1) EP3660382B1 (fr)
ES (1) ES2963986T3 (fr)
IT (1) IT201800010662A1 (fr)
PL (1) PL3660382T3 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3610855A1 (de) 1985-03-01 1987-10-08 Gok Gmbh & Co Kg Unter behaelterdruck austauschbares sicherheitsventil
JPS63133253U (fr) * 1987-02-21 1988-08-31

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3610855A1 (de) 1985-03-01 1987-10-08 Gok Gmbh & Co Kg Unter behaelterdruck austauschbares sicherheitsventil
JPS63133253U (fr) * 1987-02-21 1988-08-31

Also Published As

Publication number Publication date
EP3660382B1 (fr) 2023-11-01
PL3660382T3 (pl) 2024-03-18
IT201800010662A1 (it) 2020-05-28
ES2963986T3 (es) 2024-04-03

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