EP2623162A1 - Sprühkopf - Google Patents

Sprühkopf Download PDF

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Publication number
EP2623162A1
EP2623162A1 EP13153767.2A EP13153767A EP2623162A1 EP 2623162 A1 EP2623162 A1 EP 2623162A1 EP 13153767 A EP13153767 A EP 13153767A EP 2623162 A1 EP2623162 A1 EP 2623162A1
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EP
European Patent Office
Prior art keywords
valve
spraying
detection
shutter
channel
Prior art date
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Granted
Application number
EP13153767.2A
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English (en)
French (fr)
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EP2623162B1 (de
Inventor
Eric Issartel
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Eitl
Original Assignee
Eitl
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Publication of EP2623162A1 publication Critical patent/EP2623162A1/de
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Publication of EP2623162B1 publication Critical patent/EP2623162B1/de
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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C35/00—Permanently-installed equipment
    • A62C35/58—Pipe-line systems
    • A62C35/62—Pipe-line systems dry, i.e. empty of extinguishing material when not in use
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C35/00—Permanently-installed equipment
    • A62C35/58—Pipe-line systems
    • A62C35/68—Details, e.g. of pipes or valve systems
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C37/00—Control of fire-fighting equipment
    • A62C37/08—Control of fire-fighting equipment comprising an outlet device containing a sensor, or itself being the sensor, i.e. self-contained sprinklers
    • A62C37/10—Releasing means, e.g. electrically released
    • A62C37/11—Releasing means, e.g. electrically released heat-sensitive

Definitions

  • the invention relates to a sprinkler head, in particular for the diffusion of an extinguishing agent intended to fight against a fire or to prevent a fire, a fire protection device comprising such a sprinkler head, a method of controlling the fire, supplying, with an extinguishing agent, a pipe comprising such a sprinkler head and a method of opening a set of sprinkler heads of such a fire protection device.
  • sprinkler installations comprise a network of pipes, generally installed on the ceiling, in which sprinkler heads are inserted.
  • These sprinkler heads comprise a heat-sensitive shutter, usually a fuse capable of melting in case of temperature rise or a bulb capable of bursting in the same situation.
  • the pipes In the standby situation, that is to say in the absence of fire detection, the pipes contain an extinguishing agent under pressure, for example water, foam or gas, and the shutter of a sprinkler head prevented any release of extinguishing agent. If the temperature rises abnormally, the fuse blows or the bulb bursts, allowing for immediate sprinkling of the extinguishing agent near the heat source.
  • the sprinkler heads close to the heat source open.
  • the extinguishing agent be immediately diffused over the entire area. zoned.
  • a protection device comprising a detection network, called “pilot network”, able to detect a fire at any point in the area, and a sprinkler system, said “Deluge system”, comprising a set of permanently open sprinklers spread over the entire area to be protected.
  • the sprinkler system is therefore at atmospheric pressure and contains no extinguishing agent. It is also said that he is "dry”.
  • the detection network operates conventionally in the manner of a sprinkler installation as described above:
  • a pipe network is kept under pressure and comprises a set of sprinkler heads, each head being provided with a sensitive shutter. in the heat.
  • the activation of a shutter causes a depressurization of the pipe network, which itself leads to an activation of the sprinkler system.
  • the entire sprinkler system is fed with extinguishing agent, for example by opening a valve called “deluge valve” and / or by starting a feed pump.
  • extinguishing agent can then be dispersed immediately over the entire area.
  • a protection device of this type is bulky, expensive and requires regular maintenance, in particular to prevent leakage, sludging or corrosion of the detection network, or to unclog the sprinkler system, in particular following the nesting of some animals in the open sprinklers.
  • the detection network may comprise a set of electronic sensors.
  • Such sensors are expensive to install and maintain, especially in areas where any sparking is prohibited.
  • the figure 1 represents a spray head according to WO2009153532 assembled to a pipe C of a fire protection device.
  • the spray head comprises a body 1 and a tip 2 which closes a transfer channel 3 passing through the body.
  • the tip comprises a base crossed by an outlet channel 4 and a shutter 5 which, in the standby situation, closes the output channel.
  • the activation of the shutter conventionally serves the detection.
  • the tip can release the transfer channel under the effect of an opening force, which allows, without activation of the shutter, to diffuse an extinguishing agent in places where no abnormal increase in temperature n has been detected by simply applying said opening force.
  • This spray head therefore avoids the use of two separate detection and spray networks.
  • a spray head of the type of those described in WO2009153532 does not however allow to obtain a good quality of the spray.
  • this sprinkling may not be homogeneous or extend over an insufficient area.
  • An object of the invention is to improve the efficiency of the spray obtained with a spray head of the type of those described in WO2009153532 .
  • a spray head according to the invention allows to obtain a sprinkling without activation of the shutter, and therefore sprinkling in areas in which no fire has been detected.
  • the inventor has discovered that the provision of a sparging channel separate from the detection channel makes it possible to adapt this spray channel to the extinguishing agent and / or or the constraints imposed by the environment (size, area to be covered, extinguishant flow rate, ...), regardless of the constraints imposed for the fixing of the shutter. This results in an improvement of the spraying efficiency.
  • the spray outlet, or "nozzle” may have any size.
  • the closing member of the spraying valve can be remote from the spraying outlet, inside the spraying channel, which limits the interactions with the extinguishing agent jet, in particular when this member remains secured to the body after opening the spraying valve, which further allows to protect it.
  • the sprinkler valve closing member does not project out of the spraying channel.
  • the most downstream end of the sprinkler valve closing member is more than 0.5 cm, more than 1 cm, more than 1.5 cm, or more than 2 cm of the spray outlet.
  • the provision of a sparging channel separate from the detection channel allows great flexibility for the means used for the detection, and in particular for the type or shape of the shutter or for its means of attachment to the body. Indeed, the means used for the detection are no longer imposed by constraints related to spraying.
  • the shutter can in particular be arranged at a distance from the spray outlet, which allows a perfect adaptation to the constraints of the place to be protected. In particular, the shutter can be disposed more than 2 cm from the spray outlet.
  • the shutter valve closing valve not carrying the shutter can be of smaller dimensions and / or weight, which limits the risks to personnel or equipment during its eventual ejection, especially in places where no abnormal increase in temperature has been detected.
  • the detection input is selectively in fluid communication with the transfer channel via a detection valve allowing only a flow to the transfer channel.
  • the spray head does not have a detection valve.
  • the spraying head then comprises a deflector at the output of the detection channel in order to direct the outgoing extinguishing agent flow through this channel.
  • the sprinkler valve opening force i.e. the minimum force required to move the sprinkler valve closure member and open the sprinkler valve, is less than 1500 N. preferably less than 900 N, preferably less than 300 N, preferably less than 150 N, preferably less than 90 N, preferably less than 60 N, preferably less than 30 N, or even less than 15 N, or even less than 3 N or 1 N.
  • the opening force is between 15 N and 80 N.
  • the opening force of the spraying valve may in particular result from a positive difference between the pressure in the transfer channel, called “internal pressure", and the ambient pressure.
  • This pressure difference is referred to hereinafter as the "differential pressure of the spraying valve opening”.
  • the differential opening pressure of the spraying valve is less than 50 bar, preferably less than 30 bar, preferably less than 10 bar, preferably less than 5 bar, preferably less than 3 bar, preferably less than 2 bar, preferably less than 1 bar, or even less than 0.5 bar, or even less than 0.1 bar.
  • the differential pressure opening sprinkler valve is between 1 bar and 7 bar, or even between 1.5 bar and 6 bar.
  • the spraying valve advantageously opens very easily, especially as soon as it is subjected to the pressure of the extinguishing agent.
  • At least one of the detection and spraying valves comprises or is constituted by a non-return valve.
  • each of the detection and spray valves comprises or is constituted by a non-return valve.
  • the shutter is reusable.
  • the shutter returns to the closed position of the detection output when the ambient temperature no longer corresponds to a fire situation, preferably when the ambient temperature is below 80 ° C., below 65 ° C. or less than 50 ° C.
  • the use of a thermal valve makes it possible, for example, to obtain this function.
  • the cost of rearming the spray head after use is reduced.
  • a fire protection device comprises detection means adapted to detect an evolution of the internal pressure prevailing inside said pipe.
  • the fire protection device comprises control means able to order an injection of an extinguishing agent into the pipe in case of variation of the internal pressure, and in particular when the pipe is kept in depression in the standby situation, in case of increase of the internal pressure likely to correspond to the presence of a fire.
  • the control means can in particular control, in the event of detection of a variation in the internal pressure, an opening of an insulating deluge valve, in the standby situation, the pipe and the source of extinguishing agent and / or the starting a feed pump for injecting said extinguishing agent into the pipe.
  • the pressure of the extinguishing agent injected is sufficient to open the spraying valve of the one or more spray heads according to the invention inserted into the pipeline.
  • the pressure of the extinguishing agent leads to a substantially simultaneous opening of all the sprinkler valves of the sprinkler heads, and thus to a diffusion of the extinguishing agent over the entire area covered by these sprinkler heads. aspersion.
  • the extinguishing agent is not necessarily liquid and may advantageously be selected from the group consisting of powder, foam and gas.
  • the pipe is kept dry, preferably at a vacuum with respect to the ambient pressure.
  • the invention also relates to an installation, and in particular a room, a warehouse, or a storage tank, comprising a protection device according to the invention.
  • This installation can in particular be a refinery or a hydrocarbon storage site.
  • the invention also relates to a method for controlling the supply, with an extinguishing agent, of a pipe in which at least one spray head according to the invention is inserted, a method according to which said feed is initiated in the event of detection.
  • an abnormal evolution of the internal pressure in the pipe in particular in case of abnormal increase of the internal pressure, and in particular in case of increase of the internal pressure up to the ambient pressure.
  • the control method can in particular be applied for the opening of a deluge valve insulating the pipe of a source of extinguishing agent or for starting a pump supplying the pipeline with extinguishing agent .
  • the invention finally relates to a method of opening a set of sprinkler heads of a fire protection device according to the invention, a method according to which a differential pressure is generated for opening the sprinkler valves. in said pipe, preferably with extinguishing agent, in the event of fire detection.
  • thermosensitive is meant that the shutter is able to release, at least in part, the detection channel under the effect of an increase in temperature or when exceeding a threshold temperature determined.
  • This release of the detection channel is conventionally called “activation” of the shutter.
  • Activation of a shutter in the form of a fuse or bulb, for example, is its fusion or burst, respectively.
  • a thermal valve conventionally comprises a closure member, for example a rod, and a bulb deformable under the effect of heat and cooperating with the closure member so that the latter closes or releases an orifice in communication with the body. 'outside. When such a heat valve is used as a shutter, the detection output corresponding to said orifice, the "activation" corresponds to the release of this orifice by the closure member.
  • the closure of the detection output by the shutter is said to be "substantially watertight" when it is waterproof or tolerates a leakage flow such as the passage between the shutter and the detection channel, through which the leak occurs. , is less than 20% of the detection output section at the shutter seat.
  • opening force is meant a force exerted on the closing member of a valve such that it causes a spacing of this closure member of its seat, so as to clear, at least partially, preferably completely, the channel on which the valve is inserted.
  • the opening force "opens" therefore the valve.
  • differential opening pressure of a valve is meant a difference between the pressures upstream and downstream of the closure member of said valve adapted to create an opening of the valve by displacement of the closure member .
  • the spray head 10 shown on the figure 2a comprises a body 12 integral and a shutter 14 sensitive to heat.
  • the body 12 comprises fixing means of the type conventionally used for fixing a sprinkler head on a pipe 16 of a fire protection device.
  • the body 12 thus comprises a stirrup or a thread 18.
  • this thread corresponds to that conventionally used to fix the sprinkler heads.
  • the threading may comply with the NPT ("American National Tap Threads") standard, for example between NPT 1 ⁇ 2 in and NTP 1 in.
  • the body 12 defines a transfer channel 20, of axis X, a detection channel 22, and a spraying channel 24.
  • the transfer channel 20 opens upstream through an extinguishing agent inlet 26, and extends, downstream, by the detection channel 22 and the spray channel 24.
  • the detection channel 22 opens, on the upstream side, by a detection input 28 and, on the downstream side, by a detection output 32 isolated from the outside by the shutter 14. The activation of the shutter thus causes the contacting the detection channel with the outside.
  • the detection channel preferably has a length greater than 5 mm, or even greater than 10 mm.
  • the detection channel is selectively in fluid communication with the transfer channel 20 via a detection valve 30.
  • the detection input 28 may be continuously in fluid communication with the transfer channel 20.
  • the detection channel is then used for dispersion of extinguishing agent. It is then preferable that the spray head has a deflector at the output of the detection channel.
  • the detection valve 30 comprises a detection valve closing member 31 whose displacement allows, in case of activation of the shutter, an air inlet in the transfer channel if the latter is kept in depression, then, a closure of the detection channel by the thrust of the extinguishing agent.
  • the sensing valve 30 thus opens by moving the sensing valve closure member under the effect of a sensing valve opening force exerted on said sensing valve closure member.
  • this opening force is directed towards the transfer channel.
  • the detection valve opening force i.e. the minimum force required to move the closure member of the detection valve and open the detection valve, is less than 1500 N, preferably less than 900 N, preferably less than 300 N, preferably less than 150 N, preferably less than 90 N, preferably less than 60 N, preferably less than 30 N, or even less than 15 N, or even lower at 3 N or 1 N.
  • the opening force of the detection valve may result from a positive difference between the ambient pressure and the pressure in the transfer channel, referred to as "pressure Differential opening of detection valve ".
  • the detection valve opening differential pressure is less than 50 bar, preferably less than 30 bar, preferably less than 10 bar, preferably less than 5 bar, preferably less than 3 bar, preferably less than at 2 bar, preferably less than 1 bar, or even less than 0.5 bar, or even less than 0.1 bar.
  • the shape of the detection valve closing member is not limiting.
  • this member may take the form of a ball, a pallet or a rod.
  • the spray head may also be provided with resilient return means tending to bring the detection valve closing member towards its seat.
  • the operations for the standby situation are simplified.
  • the detection valve then constitutes a non-return valve.
  • the shutter 14 may be any device leading, under the effect of an increase in heat, to a setting in fluid communication between the detection channel and the environment.
  • the shutter is activated when it is brought to a temperature higher than a determined threshold temperature, for example greater than or equal to 50 ° C and less than 60 ° C, or even lower than 80 ° C.
  • the shutters conventionally used for sprinkler heads can be used.
  • the shutter may in particular comprise a bulb capable of breaking under the effect of an increase in temperature, or a fuse capable of melting under the same conditions.
  • the shutter is reusable. It may for example be constituted by a thermal valve (valve opening under the effect of heat) for example on the principle of water heater thermo valves or hydrostatic valves of the radiators.
  • a thermal valve valve opening under the effect of heat
  • the spray head can thus become operational again at the end of the fire, without rearming operation. Maintenance costs are also advantageously reduced.
  • the shutter can close the detection channel tightly or by allowing a leakage flow between the shutter and the detection channel.
  • manufacturing tolerances can be reduced.
  • a evolution of the internal pressure resulting from the activation of the shutter must serve as means of fire detection, it will be necessary to provide means to maintain a pressure difference between the inside and the outside of the pipe in the situation Eve.
  • the leak rate should however be limited.
  • the passage between the shutter and the detection channel, through which the leak occurs should be less than 5%, less than 1%, or even less than 0.5% or less than 0.1% of the detection output section at the shutter seat.
  • the leakage rate is less than 20%, preferably less than 10%, less than 5%, less than 1% of the flow rate obtained after activation of the shutter.
  • the leakage rate and the flow rate obtained after the shutter has been activated can be measured by maintaining a pressure upstream of the shutter seat of 2 bar and a pressure downstream of the shutter seat of 1 bar, with air and at room temperature.
  • the shutter can be held against an annular bead 34 providing a substantially sealed contact.
  • the spraying head 10 has a shutter ejector 36, activated during the activation of the shutter.
  • a shutter ejector is intended to project the shutter away from its seat when it breaks.
  • a depression prevails inside the detection channel, it advantageously makes it possible to avoid that, under the effect of this depression, pieces of shutter remain held on the seat of the shutter after his break. Such a situation would indeed hinder the entry of ambient air into the detection channel, which could lead to a failure to detect the fire.
  • the shutter ejector 36 may in particular comprise a leaf spring, a helical spring, for example of conical shape, as shown, an elastic washer, for example a Belleville washer or an elastic ejection cup. It can be arranged for example in compression in the detection channel, as shown in FIG. figure 2a , or between the shutter and its seat, as shown on the figure 3 .
  • the shutter ejector may also include an explosive charge.
  • the spray channel preferably has a length greater than 5 mm, or even greater than 10 mm.
  • the spraying channel 24 comprises, on the upstream side, a spraying inlet 38 selectively in fluid communication with the transfer channel 20 via a spraying valve 40.
  • the spraying valve 40 comprises a sprinkler valve closure member 41 whose displacement allows the selective circulation of the extinguishing agent in the spraying channel 24.
  • the shape of the sprinkler valve closure member 41 is not limiting.
  • This organ may be integral or detachable body.
  • it may take the form of a plug or any other form described for the tip in WO2009153532 .
  • an opening force of 1500 N is sufficient to move the tip (base and intact shutter maintained on the base). In other words, the tip can be moved under the effect of the opening force without breaking the shutter.
  • the spray channel opens on the downstream side by a spray outlet 42.
  • the sprinkler valve closure member 41 preferably does not protrude out of the spray channel.
  • the end furthest downstream of the sprinkler valve closure member is at a distance d preferably greater than 0.5 cm, greater than 1 cm, greater than 1.5 cm, or even greater than 2 cm. the spray outlet 42.
  • the spray outlet may have a diameter greater than 1 mm.
  • the spray channel is substantially rectilinear.
  • a deflector 44 may be provided to distribute the extinguishing agent out of the spray outlet.
  • the sprinkler valve closure member 41 is held in position on its seat for example by friction, by a magnetic force, by a link, by clipping, by gravity, by depression, by gluing, or by a combination of these means.
  • the means described in WO2009153532 to maintain the nozzle can be used to maintain the sprinkler valve closing member 41.
  • this maintenance is ensured at least in part, or even totally, by depression, the internal pressure P int prevailing in the spray channel being lower than the ambient pressure P atm .
  • the sprinkler valve closure member can be attached to the body via a hinge 46.
  • the spraying head may also be provided with return means, for example heat-deformable or resilient, tending to return the closure member of the spraying valve 41 towards its seat, (under the effect of an expansion or deformation mechanical, for example).
  • return means for example heat-deformable or resilient, tending to return the closure member of the spraying valve 41 towards its seat, (under the effect of an expansion or deformation mechanical, for example).
  • the operations for the standby situation are simplified.
  • the spraying valve then constitutes a non-return valve.
  • the sprinkler valve closure member 41 substantially seals the spray channel 24.
  • a leakage flow can be admitted between the sprinkler channel and the closure member sprinkler valve.
  • the passage between the spray channel 24 and the sprinkler valve closure member 41 is less than 5%, less than 1%, or even less than 0.5% or less than 0.1% of the section of the sprinkler channel closed by the sprinkler valve closure member.
  • the means for generating the sprinkler valve opening force are not limited and may include, in particular, forces resulting from a differential pressure between the internal pressure and the ambient pressure, gravity forces, especially weight of the sprinkler valve closure member, forces exerted by elastic means, for example by a compressed spring, forces exerted by electromagnetic means or all combinations of these means.
  • the opening of the spraying valve 40 results from the balancing between the internal pressure and the ambient pressure, in particular by activating a shutter.
  • the internal pressure is maintained higher than the ambient pressure in the standby situation.
  • the difference between the internal pressure and the ambient pressure must then be less than the differential opening pressure of the spraying valve.
  • a spray head according to the invention can be advantageously used to renovate existing installations. It suffices to replace the sprinkler heads with sprinkler heads according to the invention and to remove the detection means in place (network of pipes or electronic means).
  • the figure 3 represents a variant of spray head particularly well adapted for the renovation of existing installations.
  • This spray head comprises a T-piece 50 for attachment to the pipe.
  • the first branch 52 extending from the T-piece 50 constitutes the detection circuit and comprises successively a first adapter nipple 54, a first non-return valve 56, forming a detection valve, the arrow representing the authorized direction of movement, and a detector 58, exposing a shutter 14.
  • the second branch 62 extending from the T-piece constitutes a spraying circuit and comprises successively a second adapter nipple 64, a second non-return valve 66, forming a spraying valve, the arrow representing the direction of circulation allowed. , and a sprinkler 68, provided with a deflector 44.
  • the transfer channel (not visible) is extended on the one hand by the detection channel, which passes through the first adapter nipple 54, the first non-return valve 56 and the detector 58.
  • the seat of the shutter is constituted by the edge of the output of the detection channel.
  • a shutter ejector 36 in the form of an elastic cup, is mounted between the shutter and its seat.
  • the transfer channel is extended by the spray channel, which passes through the second adapter nipple 64, the second non-return valve 66 and the aspersenr 68, opening outwardly.
  • This embodiment illustrates the possibility that the body of a spray head according to the invention is not monobloc.
  • This embodiment also illustrates the possibility of positioning the sprinkler outlet and the shutter independently of each other, for example to take account of a particular configuration of the places.
  • the shutter 14 may in particular be arranged at a distance of more than 0.5 cm, greater than 2 cm, greater than 5 cm, greater than 10 cm, greater than 50 cm, greater than 1 m, or greater than 2 m from the spray outlet 42.
  • the sprinkler outlet and the shutter are separated from one another by less than 5 cm, less than 3 cm, or even less than 2 cm, as shown in FIG. figure 2a .
  • the spray head 10 may be used as part of a fire protection device 100.
  • the device 100 shown in FIG. figure 4 comprises a network of pipes 110 fixed for example on the ceiling of a building to be protected.
  • the pipe network 110 comprises a main pipe 111 on which are connected secondary pipes 112 provided with spray heads 10 such as those just described.
  • the shape of the pipe network 110 and the arrangement of the spray heads 10 are determined so that the spray heads 10 are distributed substantially uniformly over the entire surface to be protected.
  • the upstream end of the main line 111 is connected to a source of extinguishing agent, for example a tank 114, via a feed pump 116 and / or a deluge valve 118.
  • the extinguishing agent may be a liquid, a powder, a foam, or a gas, for example.
  • the invention is particularly advantageous for spraying a powder, a gas or a foam for which the nozzles of the present sprinkler heads are not well adapted.
  • the pump 116 When the pressure of the extinguishing agent in the tank 114 is sufficient to create a differential opening pressure of the spray valves, the pump 116 is not essential, the opening of the deluge valve 118 8 being sufficient for this purpose. effect.
  • the feed pump 116 When the pressure of the extinguishing agent in the tank 114 is insufficient to open the spraying valves, the feed pump 116 is however essential in order to increase the pressure of the extinguishing agent and to create an opening differential pressure. sprinkler valves.
  • a vacuum pump 120 is provided to create or maintain a vacuum within the pipe network 110 in the standby situation.
  • a spray head according to the invention advantageously makes it possible to maintain a pressure difference between the inside and the outside of the pipe where it is inserted, due to the closure of the spray channel by the sprinkler valve closure member and the closure of the detection channel by the shutter.
  • a sensor 122 is also provided to detect changes in the pressure in the pipe network 110.
  • a control unit 124 may also be provided to control the vacuum pump 120 when the sensor 122 detects a progressive decrease in pressure inside the pipe network 110, this pressure decrease corresponding to a leakage, especially between sprinkler valve closing member and the body or at the level of the shutter bearing on the edge of the detection outlet.
  • the control unit 124 can also, when the sensor 122 signifies a sudden decrease in the pressure inside the pipe network 110, resulting from the activation of a shutter, control the opening of the valve deluge 118 and / or the start of the pump 116.
  • the operation of the protective device represented on the figure 4 is the next.
  • the pipe network 110 is kept dry in vacuum with respect to the environment by means of the vacuum pump 120.
  • the control unit 124 controls the vacuum pump according to the information received from the sensor 122 in order to maintain the depression in the pipe network 110 to a predetermined value, in particular to take into account leaks at the sprinkler heads or upstream of the spray heads, for example at the deluge valve 118.
  • This regulation of the vacuum in the pipe network 110 advantageously allows to tolerate leakage rates, and thus limits the constraints to impose for the various components of the protection device.
  • Holding in the closed position of the spraying valve can also be improved by exploiting the gravity forces, for example by arranging the sprinkler valve closing member in a position such that its weight contributes to pressing it against the body 12. For safety, it is however preferable that the weight of the sprinkler valve closing member 41 contributes to its spacing from the body 12, as on the figure 2a .
  • the detection valve can be opened or closed. It is preferably closed. The shutter and the spraying valve provide a seal to maintain depression in the interior of the pipe.
  • the shutter ejector 36 cooperates with the bead 34 to hold the shutter 14 in the closed position of the detection channel 22.
  • the sudden increase in internal pressure will also be detected by the control unit 124, which will control the opening of the deluge valve 118 and the start of the feed pump 116.
  • the opening of the valve deluge 118 can also be obtained mechanically under the effect of the increase of the internal pressure, for example by activation of a pneumatic or hydraulic pilot. It can also result from the activation of a controlled solenoid valve system as a function of the pressure measured by the sensor 122.
  • the opening of the deluge valve 118 and the start of the feed pump 116 will cause the spread of the extinguishing agent contained in the tank 114 in the main line 111 and then in the secondary lines 112, and the heads 'aspersion.
  • the injection of extinguishing agent under pressure usually an initial pressure of more than 10 bar, then in steady state, about 3 to 4 bar, opens the spraying valve if it is still closed and closes the valve detection if it is still open.
  • the extinguishing agent is then dispersed, after deflection on the deflector 44 in the area to be protected, through the transfer channel 20 and the spray channel 24 (arrow F 2 ).
  • the flow of extinguishing agent is not hindered by the presence of the shutter ejector and the dimensions of the spray channel can be adapted to its nature and to the desired flow rate, independently of the constraints associated with the shutter.
  • the spray channel may in particular be designed for sprinkling drops of water or water streams or the projection of a water mist.
  • the current "micro sprinklers" can in particular be adapted to form sprinkler heads according to the invention.
  • a spray head according to the invention allows a remarkable spray quality. It also allows a great flexibility for the choice of the shutter, independently of the constraints related to the spraying. In addition, it can operate without risk to personnel or equipment. It is also particularly reliable and inexpensive to install and maintain.
  • a spray head according to the invention allows sprinkling even in the absence of activation of the shutter. It is therefore not necessary, as in the prior art to double the network of pipes or install a multitude of electronic sensors.
  • a spray head according to the invention is furthermore perfectly suited for use in a network of pipes maintained in depression.
  • the network of pipes can also remain dry, which avoids the risks of corrosion, sludging and obstruction.
  • the sprinkler heads can also operate without any power supply, which allows their implementation, in particular in areas of the ATEX type.
  • the pipe network may remain closed, which notably avoids any risk of obstruction by nesting animals.
  • the positioning of the detection and spray valves could be different from that shown, provided that it allows a selective fluid communication between the extinguishing agent inlet on the one hand and the detection and control outlets. sprinkler on the other hand, respectively.
  • the shape of the transfer channel could thus comprise, for example, a trunk and two branches interrupted respectively by the detection and spraying valves.
  • the protective device could be overpressure, the pressure drop resulting from the activation of a shutter serving as a fire detection signal.
  • a protection device is not necessarily configured to react in case of fire.
  • it can be configured to react as soon as an abnormal increase in temperature is detected, even in the absence of flames.
  • the protective device thus helps to prevent a fire, and thus to "protect” against fire.

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
EP13153767.2A 2012-02-03 2013-02-01 Sprühkopf Not-in-force EP2623162B1 (de)

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FR1251048A FR2986435B1 (fr) 2012-02-03 2012-02-03 Tete d'aspersion

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111135514A (zh) * 2019-12-31 2020-05-12 江苏湃森科技有限公司 一种泡沫喷射装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU210182U1 (ru) * 2021-11-17 2022-03-31 Владимир Васильевич Галайко Распылительное устройство средства пожаротушения

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20201091U1 (de) * 2002-01-24 2002-08-01 Systemtechnik Herzog Gmbh Anreger-Sprühkopf
DE20217652U1 (de) * 2002-11-15 2003-03-13 Herzog Hans Joachim Drillingsdüse mit integriertem Anregerelement
DE102007042691A1 (de) * 2007-09-07 2009-03-12 Peter Fuchs Schutzvorrichtung für Sprinkler von Feuerlöschanlagen gegen Beschädigung durch Anstoßkontakt in Form einer Sicherheitsarmatur
WO2009153532A1 (fr) 2008-06-20 2009-12-23 Eric Issartel Tete d'aspersion

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20201091U1 (de) * 2002-01-24 2002-08-01 Systemtechnik Herzog Gmbh Anreger-Sprühkopf
DE20217652U1 (de) * 2002-11-15 2003-03-13 Herzog Hans Joachim Drillingsdüse mit integriertem Anregerelement
DE102007042691A1 (de) * 2007-09-07 2009-03-12 Peter Fuchs Schutzvorrichtung für Sprinkler von Feuerlöschanlagen gegen Beschädigung durch Anstoßkontakt in Form einer Sicherheitsarmatur
WO2009153532A1 (fr) 2008-06-20 2009-12-23 Eric Issartel Tete d'aspersion

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111135514A (zh) * 2019-12-31 2020-05-12 江苏湃森科技有限公司 一种泡沫喷射装置
CN111135514B (zh) * 2019-12-31 2021-05-11 江苏湃森科技有限公司 一种泡沫喷射装置

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FR2986435B1 (fr) 2014-02-28
EP2623162B1 (de) 2016-04-27
FR2986435A1 (fr) 2013-08-09

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