EP0755700A1 - Pistolet de pulvérisation pour la lutte contre les incendies - Google Patents

Pistolet de pulvérisation pour la lutte contre les incendies Download PDF

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Publication number
EP0755700A1
EP0755700A1 EP95116172A EP95116172A EP0755700A1 EP 0755700 A1 EP0755700 A1 EP 0755700A1 EP 95116172 A EP95116172 A EP 95116172A EP 95116172 A EP95116172 A EP 95116172A EP 0755700 A1 EP0755700 A1 EP 0755700A1
Authority
EP
European Patent Office
Prior art keywords
gun according
extinguishing gun
channel
piston
extinguishing
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Withdrawn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
EP95116172A
Other languages
German (de)
English (en)
Inventor
Harald Dr. Neumaerker
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0755700A1 publication Critical patent/EP0755700A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C31/00—Delivery of fire-extinguishing material
    • A62C31/02—Nozzles specially adapted for fire-extinguishing

Definitions

  • the invention relates to an extinguishing gun according to the preamble of claim 1 and in particular to an extinguishing gun for a hand-held fire extinguisher.
  • Conventional extinguishing pistols of hand-held fire extinguishers consist of a housing which has a through-channel, the cross-section of which can be changed by means of an adjusting device.
  • the adjustment device is equipped with a hand lever for operation.
  • a connection is provided on the input side of the housing in order to be able to connect the extinguishing gun to the pressure hose of a fire extinguisher.
  • Fire guns with a connection device for connecting a pressure hose are conventionally equipped with a so-called double nipple. One side of this double nipple is inserted into the through-channel of the extinguishing gun and the other side of the double nipple is also connected to the pressure hose of the fire extinguisher.
  • Such an extinguishing pistol with a double nipple for connecting a pressure hose is known from German utility model G 92 06 928.
  • the double nipple on the side of the extinguishing gun has an external thread with which it is screwed into an internal thread in the through-channel of the extinguishing gun.
  • the double nipple has an annular groove on the side of the extinguishing gun, which is arranged in front of the external thread. A sealing ring is inserted into this annular groove, which interacts with the inner surface of the through-channel.
  • the double nipple On the side facing away from the extinguishing gun, the double nipple has known flange surfaces for attaching a pressure hose, which can be fixed to the double nipple by means of a pipe clamp, for example.
  • a pressure resistance of over 60 bar can be achieved, which is maintained even with temperature fluctuations from -20 ° C to + 60 ° C.
  • the object of the present invention is to provide a robust, easy-to-use extinguishing pistol which can be connected to a pressure line in a simple manner.
  • the extinguishing gun has a housing which is provided with a through-channel through which the extinguishing agent is conveyed.
  • the cross section of the channel can be changed by means of an adjusting device.
  • This device is operated via a lever mounted on the housing.
  • a double nipple is provided to connect the extinguishing gun, which creates the connection to a pressure line.
  • a first end of the double nipple is mounted in the through channel, while a second end is connected to the pressure line in a conventional manner.
  • the first end has a first annular groove on the outer circumference, which in the assembled state is opposite an annular groove in the through-channel, a ring being arranged in the annular grooves.
  • the ring comes partly in the ring groove of the double nipple and partly in the ring groove of the through-channel or the housing.
  • the double nipple is easily and reliably mounted on the housing of the extinguishing gun.
  • a particularly good manageability results from the fact that the housing of the extinguishing gun can be rotated as desired without restrictions with respect to the double nipple and thus with respect to the connected pressure line.
  • the ring is advantageously a resilient ring, such as a snap ring. This is compressed during assembly of the double nipple and expands when the end position is reached and the ring grooves face each other.
  • the first end is advantageously provided with a second annular groove for receiving a sealing ring.
  • the inclusion of the double nipple is facilitated if the through-channel is provided with a shoulder, by means of which the cross section to the double nipple is enlarged. In this way it can also be achieved that the cross section of the through-channel is not reduced by the double nipple.
  • different double nipples with different passage cross sections can also be used in order to be able to adapt the extinguishing gun to different conditions of use.
  • a special adjusting mechanism for adjusting the effective cross-section of the through-channel.
  • This mechanism has a piston with at least one shoulder, the annular surface of which faces the passage and is connected to it. Because of this ring-shaped surface, at which the pressure in the through-channel is present, the piston is at a certain point Limit pressure is automatically pushed out of the through channel and the through channel is thus released. By releasing the through-channel, the pressure in the through-channel drops and the fire gun is not destroyed.
  • the piston is forced into the through-channel by means of spring force, so that it is opened against the spring force by means of the lever or possibly by an overpressure in the through-channel.
  • the first end of the piston advantageously interacts with a special seat in the through-channel.
  • the first end of the piston can be provided with a sealing element.
  • the extinguishing gun In the event that the extinguishing gun is constructed so that the piston emerges from the housing, it must be sealed off from the housing. This is advantageously done via at least one seal which is provided on the circumference of the piston in the region of the piston which slides. Sealing rings are suitable for this purpose, which can be received in an annular groove on the circumference of the piston or in an annular groove on the inner circumference of the cylinder.
  • the annular surface of the shoulder for automatically opening the piston from a certain limit pressure is advantageously matched to the spring force. According to one embodiment, automatic opening is achieved from a limit pressure of 70 bar and automatic closing at a pressure of less than 40 bar.
  • the piston To actuate the piston, its second end can be connected to the lever. It is necessary to convert the pivoting movement of the lever into a translational movement of the piston.
  • This implementation can be done via an hourglass-shaped contour on the piston and a pin-like or a fork-shaped element on the lever that with the contour is engaged.
  • the hourglass-shaped contour can be provided on both sides of the piston or only on one side.
  • An hourglass-shaped hole can also be used, which interacts with a pin.
  • lever does not have to be pivotable, but can also be displaceable or can be pressed into the housing. In this case, it is not necessary to convert a swivel movement into a translation movement.
  • Various controls can be provided as levers.
  • the spring force can be applied to the piston by a spring directly or via the lever.
  • compression or tension springs can be used, which can be arranged between the housing and the lever or piston.
  • torsion springs can also be used, which can be arranged, for example, on the axis of the pivotable lever in order to load it into the closed position.
  • the through-channel preferably has a flow-optimized inner geometry that has no sharp edges.
  • the figure shows an embodiment of the invention in cross section.
  • the figure shows an extinguishing gun that can be connected to the pressure hose of a fire extinguisher.
  • the housing 4 of the extinguishing gun has a through-channel 6, in the rear end of which a double nipple 1 is inserted for connecting a pressure hose.
  • the front end of the through channel 6 merges into the ejection nozzle 10.
  • a seat 9 is formed which serves to receive a sealing element 12 which is attached to the front end of a piston 7 is provided.
  • the piston 7 has a shoulder 8 and is displaceably mounted with its rear section in a cylinder 13 of the housing 4.
  • the section of the piston 7 sliding in the cylinder 13 is provided with annular grooves 14, in which sealing rings are arranged.
  • the design of the piston 7 or of the shoulder 8 is such that the fluid present in the through-channel 6 is also present on the annular surface of the shoulder 8.
  • the rear end of the piston 7 protrudes from the housing 4 and is provided with an hourglass-shaped contour 16 on both sides.
  • the lever 5 for actuating the piston 7 is pivotally mounted on an axis 17 of the housing 4 and has a fork-shaped element 15 which is received by the bore 16. The lever 5 is pushed into the closed position shown by a spring, not shown.
  • the extinguishing gun is connected to the pressure hose 2 of the fire extinguisher via the double nipple 1.
  • the double nipple 1 has a first end 3 which is inserted into the through-channel 6 and a second opposite end 2 to which the pressure hose is fastened in a conventional manner.
  • the first end 3 is provided on its outer circumference with an annular groove 18 which, in the assembled position of the double nipple 1, lies opposite an annular groove 19 which is formed in the through-channel 6.
  • a resilient ring which is not shown in the drawing, is received in the two ring grooves 18, 19. Since the inner half of the ring is received in the annular groove 18 of the double nipple 1 and the outer half in the annular groove 19 of the through-channel 6, the double nipple 1 is held in the through-channel 6 by means of this ring.
  • a further annular groove 21 for receiving a sealing ring provided in order to effectively seal the double nipple 1 with respect to the through-channel 6 or the housing 4.
  • the passage 6 is provided on the side of the double nipple 1 with a shoulder 23 which widens the cross section.
  • the entry opening of the through-channel 6 is provided with a beveled surface 20.
  • the first end 3 of the double nipple 1 is provided with a shoulder 22 which reduces the diameter of the first end 3.
  • the double nipple 1 In order to connect the extinguishing pistol to the fire extinguisher, the double nipple 1, on which the pressure hose (not shown) is already mounted, is anchored in the through-channel 6.
  • the described double nipple 1 is equipped at its first end 3 with a sealing ring in the annular groove 21 and with a resilient snap ring in the annular groove 18.
  • the double nipple 1 is then inserted into the opening of the through channel 6, which is not a problem due to the reduced diameter at the insertion end of the double nipple 1.
  • the double nipple 1 and the housing 4 and the through channel 6 are reliably connected in a simple manner.
  • the connection ensures, as a particular advantage, that the double nipple 1 can be rotated without restriction relative to the housing 4 of the extinguishing gun.
  • the extinguishing gun As soon as the extinguishing gun is connected, it can also be used.
  • the fork-shaped element 15 By depressing the lever 5, the fork-shaped element 15 is pivoted rearward about the pivot axis 17.
  • the element 15 is connected to the piston 7 via the contour 16 and takes it with it. In this way, the piston 7 is pulled out of the through-channel 6 and the sealing element 12 is lifted off the seat 9.
  • the pivoting movement of the element 15 is converted into a translational movement of the piston 7 in a simple manner via the hourglass-shaped contour 16, without the element 15 becoming jammed. If the lever 5 is released, it is returned to its illustrated starting position by the spring (not shown) and the piston 7 is pushed into the through-channel 6 until the sealing element 12 rests on the seat 9.
  • the flow-optimized inner geometry of the through-channel which consistently avoids sharp edges and corners, minimizes turbulence and friction losses.
  • an extinguishing pistol with a housing which has a through-channel through which the extinguishing agent can be conveyed and the cross section of which can be changed by means of an adjusting device which can be actuated via a lever mounted on the housing, the extinguishing pistol being connected to a pressure line by means of a double nipple which is mounted with a first end in the through-channel, the first end of the double nipple having a first annular groove and the through-channel having a corresponding annular groove, the annular grooves lying opposite one another in the mounted state of the double nipple and a ring being arranged in the annular grooves extends into both ring grooves.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Nozzles (AREA)
  • Insulated Conductors (AREA)
  • Adhesives Or Adhesive Processes (AREA)
EP95116172A 1995-07-24 1995-10-13 Pistolet de pulvérisation pour la lutte contre les incendies Withdrawn EP0755700A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29511923U 1995-07-24
DE29511923U DE29511923U1 (de) 1995-07-24 1995-07-24 Löschpistole

Publications (1)

Publication Number Publication Date
EP0755700A1 true EP0755700A1 (fr) 1997-01-29

Family

ID=8010922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95116172A Withdrawn EP0755700A1 (fr) 1995-07-24 1995-10-13 Pistolet de pulvérisation pour la lutte contre les incendies

Country Status (2)

Country Link
EP (1) EP0755700A1 (fr)
DE (1) DE29511923U1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2195811A (en) * 1938-06-03 1940-04-02 Binks Mfg Co Flow controlled gun
US2363023A (en) * 1941-09-12 1944-11-21 Minnesota Mining & Mfg Flow gun
US2736385A (en) * 1951-12-26 1956-02-28 C O Two Fire Equipment Co Dry powder fire extinguisher nozzle
US4083497A (en) * 1976-06-03 1978-04-11 Chem-Lawn Corporation Spray gun
US4219162A (en) * 1978-05-09 1980-08-26 Hozelock Limited Spray nozzles for spraying liquids
DE9206928U1 (de) 1992-03-06 1992-07-30 Mechanische Werkstätte Koller & Co. Ges.m.b.H., Wien Geräteseitiger Anschluß einer Löschpistole
US5226682A (en) * 1992-07-21 1993-07-13 Aeroquip Corporation Coupling assembly

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2195811A (en) * 1938-06-03 1940-04-02 Binks Mfg Co Flow controlled gun
US2363023A (en) * 1941-09-12 1944-11-21 Minnesota Mining & Mfg Flow gun
US2736385A (en) * 1951-12-26 1956-02-28 C O Two Fire Equipment Co Dry powder fire extinguisher nozzle
US4083497A (en) * 1976-06-03 1978-04-11 Chem-Lawn Corporation Spray gun
US4219162A (en) * 1978-05-09 1980-08-26 Hozelock Limited Spray nozzles for spraying liquids
DE9206928U1 (de) 1992-03-06 1992-07-30 Mechanische Werkstätte Koller & Co. Ges.m.b.H., Wien Geräteseitiger Anschluß einer Löschpistole
US5226682A (en) * 1992-07-21 1993-07-13 Aeroquip Corporation Coupling assembly

Also Published As

Publication number Publication date
DE29511923U1 (de) 1995-10-05

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