EP3660382B1 - Absperrventil, insbesondere für tragbare wasserlöscher - Google Patents
Absperrventil, insbesondere für tragbare wasserlöscher Download PDFInfo
- Publication number
- EP3660382B1 EP3660382B1 EP19210790.2A EP19210790A EP3660382B1 EP 3660382 B1 EP3660382 B1 EP 3660382B1 EP 19210790 A EP19210790 A EP 19210790A EP 3660382 B1 EP3660382 B1 EP 3660382B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- ring nut
- tank
- extinguisher according
- flange
- 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.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 239000011241 protective layer Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000011282 treatment Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000003518 caustics Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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 portable water extinguisher comprising a tank containing a corrosive extinguishing agent having an upper dome with a mouth to which a ring nut is welded, and a manually operable shut-off valve of said extinguishing agent, comprising a valve-body having a base flange fixed by means of screws to said ring nut, wherein said ring nut has below a step placed in said mouth and having a height not higher than the thickness of the wall of the tank such that the lower end of the step does not protrude inside 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.
- valve-body has below a cylindrical shank that inserts inside said ring nut.
- valve for the portable water extinguisher 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)
- Fluid-Driven Valves (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
- Preventing Unauthorised Actuation Of Valves (AREA)
Claims (5)
- Tragbarer Wasserlöscher, umfassend einen Tank (100), der ein korrosives Löschmittel enthält, aufweisend eine obere Kuppel (101) mit einer Mündung (102), an die eine Ringmutter (20) angeschweißt ist, und ein manuell betätigbares Absperrventil (1) des Löschmittels, umfassend einen Ventilkörper (2) mit einem Basisflansch (23), der mittels Schrauben (24) an der Ringmutter (20) befestigt ist, dadurch gekennzeichnet, dass die Ringmutter (20) unten eine Stufe (28) aufweist, die in der Mündung (102) angeordnet ist und eine Höhe aufweist, die nicht höher als die Dicke der Wand des Tanks (100) ist, so dass das untere Ende der Stufe (28) nicht in das Innere des Tanks hineinragt.
- Löscher nach Anspruch 1, wobei der Flansch (23) an der Oberkante (29) der Ringmutter (20) anliegt und die Schrauben (24) in Gewindebohrungen (30) eingeschraubt sind, die in der Ringmutter (20) vorgesehen sind.
- Löscher nach Anspruch 1 oder 2, wobei der Ventilkörper (2) unten einen zylindrischen Schaft (25) aufweist, der in die Ringmutter (20) eingesetzt ist, und eine Dichtung (26) zwischen einer abgeschrägten Innenkante (27) der Ringmutter (20) und dem Schnittpunkt zwischen dem Flansch (23) und dem zylindrischen Schaft (25) des Ventilkörpers angeordnet ist.
- Löscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Tank (100) innen mit einer Schutzschicht aus Kunststoff (105) bedeckt ist, die auch die Innenfläche der Ringmutter (20) bis zu einer abgeschrägten inneren Dichtkante (27) derselben bedeckt.
- Löscher nach einem der vorhergehenden Ansprüche, wobei der Ventilkörper (2) innen hohl ist und einen kleinen Kolben (3) aufnimmt, der normalerweise das Ventil schließt und mittels eines Druckknopfhebels (12) betätigt werden kann, um den Durchtritt des Löschfluids von einer unteren Eintrittsöffnung zu einer seitlichen Austrittsöffnung zu ermöglichen, die in dem Ventilkörper (2) vorgesehen sind.
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 EP3660382A1 (de) | 2020-06-03 |
EP3660382B1 true EP3660382B1 (de) | 2023-11-01 |
Family
ID=65576522
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19210790.2A Active EP3660382B1 (de) | 2018-11-28 | 2019-11-21 | Absperrventil, insbesondere für tragbare wasserlöscher |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3660382B1 (de) |
ES (1) | ES2963986T3 (de) |
IT (1) | IT201800010662A1 (de) |
PL (1) | PL3660382T3 (de) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3610855A1 (de) * | 1985-03-01 | 1987-10-08 | Gok Gmbh & Co Kg | Unter behaelterdruck austauschbares sicherheitsventil |
JPH0536444Y2 (de) * | 1987-02-21 | 1993-09-14 |
-
2018
- 2018-11-28 IT IT102018000010662A patent/IT201800010662A1/it unknown
-
2019
- 2019-11-21 PL PL19210790.2T patent/PL3660382T3/pl unknown
- 2019-11-21 EP EP19210790.2A patent/EP3660382B1/de active Active
- 2019-11-21 ES ES19210790T patent/ES2963986T3/es active Active
Also Published As
Publication number | Publication date |
---|---|
PL3660382T3 (pl) | 2024-03-18 |
IT201800010662A1 (it) | 2020-05-28 |
EP3660382A1 (de) | 2020-06-03 |
ES2963986T3 (es) | 2024-04-03 |
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