EP0550848A2 - Soupape pour produits extincteurs - Google Patents

Soupape pour produits extincteurs Download PDF

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Publication number
EP0550848A2
EP0550848A2 EP92121131A EP92121131A EP0550848A2 EP 0550848 A2 EP0550848 A2 EP 0550848A2 EP 92121131 A EP92121131 A EP 92121131A EP 92121131 A EP92121131 A EP 92121131A EP 0550848 A2 EP0550848 A2 EP 0550848A2
Authority
EP
European Patent Office
Prior art keywords
extinguishing agent
flow channel
valve according
agent valve
line
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Withdrawn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
EP92121131A
Other languages
German (de)
English (en)
Other versions
EP0550848A3 (en
Inventor
Hermann Brennecke
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.)
Alfo AG AG fur Industrieapparate
Alfo AG
Original Assignee
Alfo AG AG fur Industrieapparate
Alfo AG
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 Alfo AG AG fur Industrieapparate, Alfo AG filed Critical Alfo AG AG fur Industrieapparate
Publication of EP0550848A2 publication Critical patent/EP0550848A2/fr
Publication of EP0550848A3 publication Critical patent/EP0550848A3/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
    • A62C4/02—Flame traps allowing passage of gas but not of flame or explosion wave in gas-pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
    • B05B12/12—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus

Definitions

  • the invention relates to an extinguishing agent valve with a largely rectilinear flow channel for the conveying medium, in particular for powdery substances, and an extinguishing agent line, which is connected to the flow channel with the interposition of a movable valve body.
  • Extinguishing agent valves of this type are used in systems that are at risk of fire and explosion in order to suddenly press extinguishing agent directly into the product line in the event of danger and thus fight the source of the fire.
  • Known extinguishing agent valves are designed as T-shaped fittings, in which the transverse extinguishing agent line is connected to the flow channel for the conveying medium via a check valve.
  • changes in the cross-sectional shape and discontinuities in the surface of the flow channel are inevitable in the transition area between the valve and the flow channel.
  • powdered medium settles out, which gradually grows into a small plug until it is finally torn off by the flow.
  • electrostatic coating systems This leads to unevenness in the paint surface and to difficulties in cleaning the line for the conveying medium in such a way that residues of coating material remain on the cross-sectional changes, discontinuities and the like, which mix with the material of the next coating batch and lead to color changes.
  • the powder batch can also obstruct or delay the opening of the extinguishing agent valve, which is extremely undesirable from a safety point of view.
  • Teflon disk on the opening of the extinguishing agent line, which is blown off by the pressure of the extinguishing agent in the event of danger.
  • the present invention is therefore based on the object of developing an extinguishing agent valve which is characterized by the smallest possible discontinuities on the surface of the flow channel for the conveying medium and nevertheless enables the valve to be opened quickly and safely in the event of danger.
  • the extinguishing agent valve should be suitable for electrostatic powder coating, but also generally for the conveyance of explosive powder / air mixtures.
  • a wall piece of the flow channel itself functions as a valve body, that this wall piece is guided displaceably in the longitudinal direction of the channel and is elastically connected at one end to the subsequent stationary flow channel, while at the other end it can be lifted off the subsequent flow channel, whereby forms a gap to the extinguishing agent line.
  • the essence of the invention is therefore not to form the valve body as before by an element which can be lowered into an opening of the flow channel transversely to the conveying direction, but instead to use a part of the flow channel itself and to move it in the longitudinal direction of the channel.
  • the gap for the entry of the extinguishing agent is formed at one end of this displaceable wall piece, at the other end the displacement movement has to be absorbed elastically, which can be easily accomplished by connecting a flexible hose.
  • An absolutely smooth cylindrical passage through the flow channel is obtained in this way, so that any local powder is frequently excluded.
  • the displaceable wall section is expediently a pipe section made of the same material and the same internal dimensions as the adjacent stationary flow channel, which acts as a valve seat for the movable wall section.
  • the extinguishing agent line is expediently connected via an annular space to the area of the wall section where a gap forms when it is opened. In this way it is ensured that the extinguishing agent, for example CO2, is supplied in sufficient quantity and that at the same time the flow of the medium is blocked.
  • the extinguishing agent for example CO2
  • the displaceable wall piece on its end face that comes into contact with the adjacent channel can be specially designed, for example, have a very narrow end face, so that a high Hertzian pressure and a correspondingly good seal is achieved.
  • several staggered sealing surfaces can be provided there, which act like a labyrinth seal.
  • the displaceable wall piece For the automatic actuation of the displaceable wall piece, it expediently has a piston surface on the outside, which is guided in a cylinder space, which is assigned to the liftable end of the wall piece and is connected to the extinguishing agent line.
  • An oppositely arranged spring element holds the wall piece in the closed position in normal operation.
  • the wall piece previously referred to as displaceable remains stationary and instead the adjacent flow channel, which was referred to as the valve seat, carries out the displacement movement. If he carries the extinguishing agent line, an elastic connection must of course be provided so that the extinguishing agent line can follow the displacement path.
  • the advantages according to the invention can also be realized in the form that the flow channel is surrounded near its end by forming a gap connected to the extinguishing agent line by a mouthpiece which consists of a gap between the gap and the Flow channel closing position is displaceable into a position opening the space. It is in its closed position at the end of the flow channel, but can itself also have a bore to be viewed as a continuation of the flow channel.
  • the extinguishing agent line can be flexibly connected to the mouthpiece.
  • it is connected to a body surrounding the flow channel, crosses this body through a longitudinal bore and thereby reaches the aforementioned space.
  • this body can act as a guide for the displacement of the mouthpiece.
  • the extinguishing agent valve consists of a cylindrical housing 1, which at its outflow end a conical reduction in cross section 1a merges into a connecting pipe 1b.
  • a pipe section 2 is axially displaceably guided, which has the same inner diameter as the connecting pipe 1b, is arranged in a coaxial extension to it and thus forms a continuous flow channel together with the connecting pipe, which is intended for the pumped medium.
  • the axial guidance of the pipe section 2 in the housing 1 takes place via an integrally molded piston 2c which is acted upon by a compression spring 3 on one side, in the exemplary embodiment on the upstream side.
  • This spring presses the pipe section 2 with its end 2b against the connecting pipe 1b, so that there is a virtually gap-free transition.
  • the piston 2c forms, together with the housing walls 1 and 1a and the pipe section 2, an annular space 4 to which an extinguishing agent line 5 is connected.
  • a guide ring 6 is arranged at the upstream end of the housing 1, in the inner bore of which the pipe section 2 runs. At the same time, this guide ring also serves to support the spring 3.
  • connection of the medium is made via the free end 2a of the pipe section 2.
  • This connection is to be made elastic, expediently via a flexible hose 7, if, as in the exemplary embodiment, the axial displacement takes place through the pipe section 2 and the housing 1 with the extinguishing agent connection remains stationary.
  • the conveyed medium for example powder from an electrostatic painting system
  • the continuation from the connecting pipe 1b takes place through a line, not shown.
  • Figure 2 shows a similar embodiment, but with reversed movement and different positioning of the extinguishing agent connection.
  • the housing here only consists of a mouthpiece 11, which at its downstream end merges into a cylindrical opening 11b via a conical cross-sectional constriction 11a. Coaxially aligned with this, the pipe section 12 is connected upstream, but in this case it can remain stationary because of the displacement movement is carried out for the supply of extinguishing agent from the mouthpiece 11.
  • a guide ring 12c is arranged on the tube piece 12, on which the cylindrical part of the mouthpiece 11 is slidably mounted.
  • a similar guide ring 16 is located at the end of the housing 11. However, the guide ring 16 is fixed on the housing 11 and is displaceably guided on the pipe section 12.
  • a compression spring 13 is in turn clamped between these two guide rings. It holds the mouthpiece 11 in contact with the pipe section 12, that is to say in the closed position.
  • extinguishing agent is pressed into the annular space 14 via lines 15, so that it opens towards the flow channel of the conveying medium as in the previous exemplary embodiment, but this time by shifting the outer part 11.
  • the extinguishing agent line 15 can be made rigid, as in the previous exemplary embodiment, because it is not fixed on the displaceable outer part 11, but rather on the stationary guide ring 12c.
  • FIG. 3 shows a particularly expedient design in which the extinguishing agent valve is pushed onto an electrostatic spray gun.
  • a smooth, cylindrical flow channel 12 for the powder coating material which in this case is electrostatically charged to high voltage in front of or inside the valve.
  • a flange ring 17 is mounted facing away from the outflow end of the line 12 and on the one hand carries a connection 18 of large diameter for the extinguishing agent line and on the other hand a cylindrical guide surface 19 for the axially displaceable mouthpiece 11.
  • the mouthpiece 11 is constructed similarly to that in FIG. 2 and, in particular at its downstream end, has a conical cross-sectional constriction 11a which lies against the flow channel 12 on the inside.
  • the flow channel has an inclined end face 12b which is flush with a corresponding counter surface on the conical cross-sectional constriction 11a, so that there is a flush, gap-free contact.
  • the mouthpiece 11 is pressed upstream by a spring 13 into the position shown, so that the annular space 20 which can be acted upon by the extinguishing agent is closed between the line 12 and the mouthpiece 11.
  • extinguishing agent is pressed into the annular space 20 via the connection 18, so that the mouthpiece 11 is moved counter to the spring pressure and opens the annular space.
  • valve carries a baffle plate 21 which is arranged coaxially at a distance from the outlet opening of the valve and with its conical baffle surfaces facing the valve for optimal distribution of the powder jet arriving in line 12.
  • the baffle plate 21 is held by a central rod 22 which runs inside the valve and is optionally connected to a rotary drive in order to increase the radial distribution of the powder on the baffle plate 21.
  • the extinguishing agent valve is seated flush on a continuous inner line 23.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Lift Valve (AREA)
EP19920121131 1992-01-04 1992-12-11 Valve for fire extinguishing substances Withdrawn EP0550848A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4200108 1992-01-04
DE4200108A DE4200108A1 (de) 1992-01-04 1992-01-04 Loeschmittelventil

Publications (2)

Publication Number Publication Date
EP0550848A2 true EP0550848A2 (fr) 1993-07-14
EP0550848A3 EP0550848A3 (en) 1993-09-01

Family

ID=6449110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920121131 Withdrawn EP0550848A3 (en) 1992-01-04 1992-12-11 Valve for fire extinguishing substances

Country Status (2)

Country Link
EP (1) EP0550848A3 (fr)
DE (1) DE4200108A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110013630A (zh) * 2018-01-09 2019-07-16 中国石油化工股份有限公司 具有自清洁功能的阻火器
CN112317156A (zh) * 2020-10-24 2021-02-05 四川成功新型材料科技有限公司 一种铝单板往复式喷涂设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2819666A1 (de) * 1978-05-05 1979-11-08 Irs Gmbh Lackspruehverfahren- und vorrichtung mit eigenem integriertem brandschutz
EP0050232A2 (fr) * 1980-10-17 1982-04-28 Hans Grossniklaus Méthode pour empêcher une propagation du feu sur le chemin d'alimentation en combustible solide d'une installation de combustion et installation pour la mise en oeuvre de la méthode
EP0349475A2 (fr) * 1988-06-29 1990-01-03 Intec Maschinenbau Gmbh Installation de pulvérisation de laque ou de poudre de matière plastique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1243745A1 (ru) * 1983-07-15 1986-07-15 Kompanets Sergej S Пожарный ствол
US4688644A (en) * 1986-04-14 1987-08-25 Graco Inc. Ignition and fire suppressor
SU1553151A1 (ru) * 1988-06-24 1990-03-30 Всесоюзный научно-исследовательский институт противопожарной обороны Устройство дл распылени жидкости
DE3822160A1 (de) * 1988-06-30 1990-01-11 Total Feuerschutz Gmbh Verfahren und vorrichtung zum verstellen eines duesenkopfes

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2819666A1 (de) * 1978-05-05 1979-11-08 Irs Gmbh Lackspruehverfahren- und vorrichtung mit eigenem integriertem brandschutz
EP0050232A2 (fr) * 1980-10-17 1982-04-28 Hans Grossniklaus Méthode pour empêcher une propagation du feu sur le chemin d'alimentation en combustible solide d'une installation de combustion et installation pour la mise en oeuvre de la méthode
EP0349475A2 (fr) * 1988-06-29 1990-01-03 Intec Maschinenbau Gmbh Installation de pulvérisation de laque ou de poudre de matière plastique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110013630A (zh) * 2018-01-09 2019-07-16 中国石油化工股份有限公司 具有自清洁功能的阻火器
CN112317156A (zh) * 2020-10-24 2021-02-05 四川成功新型材料科技有限公司 一种铝单板往复式喷涂设备

Also Published As

Publication number Publication date
DE4200108A1 (de) 1993-07-08
EP0550848A3 (en) 1993-09-01

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