JP5270778B2 - Electrostatic spraying head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently extinguish and control a fire with a small amount of an aqueous fire extinguisher sprinkled. <P>SOLUTION: An aqueous fire extinguisher is pressurized and supplied via a line 16 to a charging sprinkler head 10 installed in a protective area A, and sprayed particles of the fire extinguisher are charged from the charging sprinkler head 10 and sprinkled. A charged voltage is applied in pulse form or alternate current form from a voltage application unit 15 to the charging sprinkler head 10, and an external electric field produced by application of the voltage between a water side electrode part and an induction electrode part is applied to the extinguisher in an injection process so as to charge the sprayed particles. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

The present invention relates to a charge spraying head for spraying water, seawater, and a water-based fire extinguishing agent containing a fire extinguishing agent.

  Conventionally, this type of water-based fire disaster prevention equipment includes sprinkler fire extinguishing, water spray fire extinguishing equipment, water mist fire extinguishing equipment, and the like. In particular, the water mist fire extinguishing equipment reduces the water particles to 20-200 μm, which is a fraction of that of sprinkler equipment and water spray equipment, and discharges it into the space. Therefore, the fire extinguishing effect with a small amount of water is expected.

  In recent years, sprinkler fire extinguishing equipment, water spray fire extinguishing equipment, or water mist fire extinguishing equipment that uses water as a fire extinguisher have more environmentally friendly and human-friendly water than gas-based fire extinguishing agents such as carbon dioxide and nitrogen. Because it is a fire extinguisher, it is being reviewed.

JP 11-192320 A JP-A-10-118214 JP 58-174258 A JP 2005-287655 A JP-A-03-186276 JP-A-03-186277

  However, it is generally accepted that conventional sprinkler fire extinguishing equipment and water spray fire extinguishing equipment have a high fire extinguishing ability, but the amount of radiated water increases to ensure the fire extinguishing ability. Reducing water-wetting damage after extinguishing is an issue.

  On the other hand, in a water mist fire extinguishing system that is considered to be less susceptible to water wetting, the space is filled with relatively small water particles, aiming at the cooling effect and the obstruction effect of oxygen supply by evaporating water. In fact, the fire fighting ability is not so high.

  It is presumed that as a factor, small water particles are repelled by the molecular motion of high-temperature air in contact with the high-temperature combustion object, and the effect of adhering to the combustion surface and getting wet is small.

An object of the present invention is to provide a charging spray head that can efficiently extinguish and suppress a fire with a small spray amount of a water-based fire extinguisher.

The present invention, in the electrification spray head for spraying by charged injection particles of water-based fire extinguishing agents,
Is connected to the pipe for supplying water-based fire extinguishing agents, an injection nozzle for spraying is converted into particles by ejecting a water-based extinguishant outside the injection space,
Are arranged using a conductive material between the piping and the injection nozzle, and the water-side electrode that contacts the extinguishing agent for the aqueous supplied to the injection nozzle,
Disposed injection space, the external electric field caused by Rukoto charging voltage is sign pressurized between the water-side electrode unit, is applied to extinguishing agent water in the process of converting the particles injection space, the injection particles An induction electrode section to be charged ;
It is provided with.

The present invention provides an electrification spray head for spraying by charged injection particles of water-based fire extinguishing agents,
Is connected to the pipe for supplying water-based fire extinguishing agents, an injection nozzle for spraying is converted into particles by ejecting a water-based extinguishant outside the injection space,
Are arranged using a conductive material on the side which connects the injection nozzle of the piping, and the water-side electrode that contacts the extinguishing agent water supplied to the injection nozzle,
Disposed injection space, the external electric field caused by Rukoto charging voltage is sign pressurized between the water-side electrode unit, is applied to extinguishing agent water in the process of converting the particles injection space, the injection particles An induction electrode section to be charged ;
It is provided with.

  Here, the induction electrode portion is any one of a metal having conductivity, a resin having conductivity, a rubber having conductivity, or a composite, and has a ring shape, a cylindrical shape, a vertical plate shape, a parallel plate shape, a wire. It is either a shape or a wire mesh shape.

  The voltage of the water side electrode part is set to zero volts and dropped to the ground, and a predetermined charging voltage is applied to the induction electrode part.

  A part or all of the induction electrode part is covered with an insulating material.

The water-based fire extinguisher is water, seawater, or water containing a chemical that enhances fire fighting power.

  According to the present invention, by charging the water particles sprayed from the charging spray head, the water particles adhere not only to the high-temperature combustion surface but also to all surfaces of the combustion material due to the Coulomb force. Compared with normal water particles that are not, the wetting effect is greatly increased and the fire extinguishing power can be increased.

  In addition, for example, when charged and sprayed with only negative charges, repulsive force works between water particles in the space, the probability of growing and falling due to collision association is small, and the density of water particles staying in the space is also high. Is a high factor.

  When the inventor of the present application conducted a fire extinguishing experiment, it was confirmed that the fire extinguishing performance was dramatically improved in comparison with the conventional uncharged spraying, exceeding the initial expectation. According to the charged spraying of the present invention, an equivalent fire-extinguishing effect is obtained with about 1/4 of the amount of fire-extinguishing water in the conventional non-charged spraying.

In addition, according to the charged spraying of the present invention, it has been experimentally confirmed that the smoke extinguishing performance of the smoke generated at the time of fire is greatly improved compared to the conventional non-charged spraying, which is an image that could not be initially expected. This is a periodical result. According to the charged spraying of the present invention, an equivalent smoke-extinguishing effect is obtained with about 1/5 the amount of fire extinguishing water at the time of conventional non-charged spraying.

Explanatory drawing which showed embodiment of the fire disaster prevention equipment by this invention Explanatory drawing which took out and showed the protection area A of FIG. Explanatory drawing which showed embodiment of the charge distribution head using a ring induction electrode part Explanatory diagram showing experimental results to confirm that smoke from fire is charged The graph figure which showed the experimental result which confirms the smoke-extinguishing effect by this embodiment The time chart which showed the applied voltage supplied to the charge distribution head of this embodiment Explanatory drawing which showed other embodiment of the charge distribution head using a cylindrical induction electrode part. Explanatory drawing which showed other embodiment of the charging dispersion | distribution head using a metal-mesh induction electrode part. Explanatory drawing which showed other embodiment of the charge distribution head using a parallel plate induction electrode part. Explanatory drawing which showed other embodiment of the charge distribution head using a needle-shaped induction electrode part.

  FIG. 1 is an explanatory view showing an embodiment of a fire disaster prevention facility according to the present invention. In FIG. 1, a charging spray head 10 according to the present embodiment is installed on the ceiling side of protective areas A and B such as a computer room in a building.

  A pipe 16 is connected to the electrostatic spraying head 10 from a protruding side of a pump unit 12 installed with respect to a water source 14 that functions as a fire extinguishing agent supply facility via a manual valve (gate valve) 13. Later, it is connected via a pressure regulating valve 30 and an automatic opening / closing valve 32 to the charging and spreading head 10 installed in each of the protection areas A and B.

  In each of the protection areas A and B, a dedicated fire sensor 18 for controlling the spraying from the charging spraying head 10 is installed. Further, an interlocking control relay device 20 is provided for each of the protection areas A and B, and a manual operation box 22 for performing spraying control from the charging spraying head 10 by manual operation is provided.

  A signal line from the dedicated fire detector 18 and the manual operation box 22 is connected to the interlock control relay device 20, and a signal line for applying a voltage for charging driving to the charging spraying head 10, and A signal line for opening / closing the automatic opening / closing valve 32 is drawn out.

  Further, a fire detector 26 of an automatic fire alarm facility is installed in the protection area A, and is connected to a sensor line from a receiver 28 of the automatic fire alarm facility. In addition, although the fire detector 26 of the automatic fire alarm facility is not provided in the protection area B, it is a matter of course that it may be provided as necessary.

  The interlock control relay device 20 installed corresponding to the protection areas A and B is connected to the system monitoring control panel 24 by signal lines. A receiver 28 of an automatic fire alarm facility is also connected to the system monitoring control panel 24. Further, the system monitoring control panel 24 connects the pump unit 12 to the signal line and controls the pump start / stop in the pump unit 12.

  FIG. 2 is an explanatory view showing the protection area A in FIG. On the ceiling side of the protection area A, a charging spray head 10 is installed. A pipe 16 from the pump unit 12 shown in FIG. 1 is connected to the electrification spraying head 10 via a pressure regulating valve 30 and an automatic opening / closing valve 32.

  In addition, a voltage application unit 15 is installed on the upper part of the charging / spreading head 10. As will be clarified in the following description, a fire extinguishing that applies a predetermined voltage to the charging / spreading head 10 and ejects it from the charging / spreading head 10. The agent is charged so that it can be sprayed. Also, a dedicated fire detector 18 is installed on the ceiling side of the protection area A, and a fire detector 26 of an automatic fire alarm facility is also connected.

  FIG. 3 shows an embodiment of the charge distribution head 10 shown in FIGS. 1 and 2, and this embodiment is characterized in that a ring induction electrode portion is used.

  In FIG. 3A, the charging spray head 10 has a head body 36 screwed and fixed to the tip of a falling pipe 34 connected to the pipe from the pump unit 12. A cylindrical water-side electrode portion 40 is incorporated inside the front end of the head main body 36 via an insulating member 41.

  As shown in FIG. 2, the ground cable 50 is drawn from the voltage application unit 15 installed at the upper portion of the water-side electrode unit 40 and installed inside the head body 36 via an insulating member 41. It is connected to the water side electrode part 40. With the connection by the ground cable 50, the water-side electrode unit 40 has an applied voltage of 0 volts and is dropped to the ground side.

  An injection nozzle 38 is provided below the water side electrode unit 40. The injection nozzle 38 includes a nozzle rotor 38a provided inside the water-side electrode portion 40 and a nozzle head 38b provided on the tip side.

  The injection nozzle 38 receives supply of the water-based extinguishing agent pressurized from the pump unit 12 of FIG. 1 from the falling pipe 34, passes through the nozzle body 38a, and is injected to the outside from the nozzle head 38b. Water-based fire extinguishing agent is converted into particles and sprayed. In the present embodiment, the spray pattern sprayed from the spray nozzle 38 has a so-called full cone shape.

  A cover 42 made of an insulating material is fixed to the spray nozzle 38 with screws using a fixing member 43. The cover 42 is a substantially cylindrical member, and a ring-shaped induction electrode portion 44 is incorporated into the lower opening by screwing a stopper ring 46.

  As shown in FIG. 3B, the ring-shaped induction electrode portion 44 has an opening 45 through which the spray particles from the spray nozzle 38 pass at the center of the ring-shaped main body.

  A voltage application cable 48 is drawn from the upper voltage application unit 15 shown in FIG. 2 to the ring-shaped induction electrode unit 44 disposed at the lower part of the cover 42, and the electrode application cable 48 is made of a cover 42 made of an insulating material. And is connected to the ring-shaped induction electrode portion 44 so that a voltage can be applied.

  Here, as the water-side electrode portion 40 and the ring-shaped induction electrode portion 44 used in the charging / spreading head 10 of the present embodiment, in addition to conductive metal, conductive resin, conductive rubber Or a combination thereof.

  When spraying a water-based fire extinguishing agent from the charge spraying head 10, the voltage application unit 15 shown in FIG. 2 is operated by a control signal from the interlock control relay device 20 shown in FIG. An applied voltage in the form of a direct current, an alternating current, or a pulse that does not exceed 20 kilovolts is applied to the ring-shaped induction electrode portion 44 on the ground side that becomes a bolt.

  In this way, when a voltage of, for example, several kilovolts is applied between the water-side electrode portion 40 and the ring-shaped induction electrode portion 44, an external electric field is generated between the electrodes due to this voltage application, and the water-based fire extinguishing from the injection nozzle 38 The injection particles are charged through the injection process in which the agent is converted into the injection particles, and the charged injection particles can be dispersed to the outside.

  Next, the monitoring operation in the embodiment of FIG. 1 will be described. If a fire F occurs in the protection area A, for example, the dedicated fire detector 18 detects a fire and sends a fire detection signal to the system monitoring control panel 24 via the interlock control relay device 20.

  When the system monitoring and control panel 24 receives a notification from the dedicated fire detector 18 installed in the protection area A, the pump unit 12 is activated, fire-extinguishing water is pumped from the water source 14 and pressurized by the pump unit 12, Supply.

  At the same time, the system monitoring control panel 24 outputs an activation signal for the charging and spreading head 10 to the interlock control relay device 20 provided corresponding to the protection area A. In response to this activation signal, the interlock control relay device 20 opens the automatic open / close valve 32, whereby the water-based fire extinguisher having a constant pressure regulated by the pressure regulating valve 30 is passed through the opened automatic open / close valve 32. It is supplied to the charging spraying head 10 and sprayed as spray particles from the charging spraying head 10 to the protection area A as shown in FIG.

  At the same time, the interlock control relay device 20 sends an activation signal to the voltage application unit 15 provided in the charge distribution head 10 shown in FIG. 2, and the voltage application unit 15 receives the activation signal, for example, to the charge distribution head 10. An applied voltage that is DC, AC, or pulsed, which is several kilovolts, is supplied.

  For this reason, in the charging / spreading head 10 shown in FIG. 3 (A), the ground cable 50 is connected when the water-based fire extinguishing agent pressurized from the spray nozzle 38 is sprayed and converted into sprayed particles. The water side electrode portion 40 is set to 0 volts, and a voltage of several kilovolts is applied to the ring-like induction electrode portion 44 side to which the voltage application cable 48 is connected. An external electric field generated by this voltage application is applied from the injection nozzle 38. The sprayed particles converted by spraying can be charged and sprayed by being applied to an aqueous fire extinguisher that is sprayed and passing through the opening 45 of the ring-shaped induction electrode portion 44.

  As shown in FIG. 2, the water particles sprayed from the electrostatic spraying head 10 toward the protection area A where the fire F is generated are charged with water, so that the fire F is generated by the Coulomb force due to charging. Efficiently adheres to high-temperature combustion sources due to, and also adheres to all surfaces of the combustible material. Compared to the conventional spraying of non-charged water particles, the wetting effect on the combustible material is greatly increased and the fire extinguishing ability is high. Is demonstrated.

  3A, for example, when the water side electrode portion 40 is set to 0 volts and a positive voltage is applied to the ring-shaped induction electrode portion 44 in a pulsed manner, The sprayed water particles are sprayed with only a negative charge. In this way, when spraying water particles charged only to a negative charge, repulsive force works between the charged water particles in the space, which reduces the probability that the water particles collide and grow and fall. The density of water particles staying in the space is increased, and thus a high fire extinguishing ability is exhibited.

  Further, by spraying the water particles charged from the charging spray head 10 to the protection area A, a smoke extinguishing effect for efficiently extinguishing the smoke generated by the fire F can be obtained.

  In the present embodiment, the smoke extinguishing effect in the present embodiment is that the conventional smoke extinguishing effect due to the dispersion of water particles is a capturing action due to a stochastic collision between water particles and smoke particles. By charging the sprayed water particles, the smoke particles that are also in the charged state are collected by the Coulomb force, thereby exerting a significant smoke eliminating action.

  Here, the particle diameter of the water particles sprayed from the charging spray head 10 of the present embodiment includes, for example, those having various particle diameters when the spray nozzle 38 of FIG. 3A is used. In this embodiment, the particle diameter of the water particles is not particularly specified, but in consideration of the advantage of adhesion to the combustion substance by Coulomb force, many water particles of about 200 μm or less are included. It is desirable to use a simple injection nozzle 38.

  Next, the fire extinguishing effect by this embodiment is demonstrated. As already described, in spraying charged to the spray particles using the charging spray head 10 of the present embodiment, the water particles are charged, so that the combustion material not only adheres to the high combustion surface by Coulomb force. As a result, the wettability is greatly increased as compared with conventional non-charged water particles, so that a high fire extinguishing power is obtained.

  Further, for example, when charged and radiated only to a negative charge, repulsive force acts between water particles in the space, and the probability of colliding and growing and falling is reduced, and the density of water particles staying in the air is increased. That is also a factor in high fire extinguishing ability.

  For these reasons, in the water particle charging radiation using the charged spraying head of the present embodiment, the fire extinguishing performance is greatly improved as compared with the conventional non-charged water particle spraying.

The inventor of the present application conducts the following fire extinguishing experiment in order to confirm improvement in fire extinguishing performance.
(Experimental example 1)
Fire extinguishing test result of wood crib fire Experimental conditions Nozzle injection amount: 8 liters / min at1 MPa
Induction electrode voltage: 2 kV Fire model: 12 mm square, 150 mm square material x 22 Ignition agent: n heptane ignition extinction time Charged: 14 seconds Uncharged: 54 seconds

  From this experimental result, in the charge spraying according to the present embodiment, an equivalent fire-extinguishing effect is obtained with about 26% of the amount of fire-extinguishing water at the time of non-charged spraying, that is, about one-fourth of the amount of fire-extinguishing water.

  Next, the smoke eliminating effect by the charge spraying in this embodiment will be described. Compared with the conventional non-charged spraying, the charged spraying of the present embodiment greatly improves the smoke evacuation performance of the smoke generated during the fire.

  The inventors of the present application have confirmed by experiments that smoke from a fire is charged. FIG. 4A is a photograph of a synchroscope showing the state of charge of smoke measured by a passing type Faraday gauge.

  FIG. 4A shows the output of the pass-through Faraday gauge in the absence of smoke, which falls within a substantially constant noise level.

  FIG. 4B shows the output of the passing type Faraday gauge when smoke is passed, and the synchroscope waveform is greatly shaken on the screen, indicating that the charged state of the smoke particles is remarkable.

  The reason why a high smoke-extinguishing effect can be obtained by electrification spraying according to this embodiment is that the conventional trapping of smoke by non-charging spraying is a trapping means by stochastic collision of smoke particles and water particles. If the water particles are charged, the smoke particles in the charged state are collected by the Coulomb force, as is apparent from the synchroscope waveform of FIG.

  For example, if water particles in a charged state are 100 to 200 μm, smoke particles that are also in a charged state are 1 to 2 μm, and a large number of small smoke particles around the water particles are collected by Coulomb force. As a result, a great smoke eliminating effect is obtained.

In order to confirm the increase in the smoke eliminating effect according to this embodiment, the following experiment is performed.
(Experimental example 2)
Nozzle injection amount: 8 liters / minute at1 MPa
Induction electrode voltage: 2 kilovolt water discharge pattern: Pulsed water discharge fire model: 50 ml of gasoline burned in a closed space of 1.8 cubic meters, filled with smoke, then 5 cycles with 60 seconds water discharge and 120 seconds interval To measure smoke concentration transition

  FIG. 5 is a graph showing the experimental results of Experimental Example 2. The experimental results in FIG. 5 show elapsed time on the horizontal axis and smoke density on the vertical axis. Further, the experimental characteristic 100 is a charging distribution according to the present embodiment, and the experimental characteristic 200 is a conventional non-charging distribution.

  In FIG. 5, when the gasoline is ignited at time t1, the smoke concentration rapidly increases as shown in the experimental characteristics 100 and 200. Actually, when observed from the outside, the inside of the closed space is black with burnt smoke and is completely visible. There is no state.

  Subsequently, spraying is started at time t2. In the experimental characteristics 100 of the present embodiment, first, the first charge spraying is performed from time t2 to t3, and the smoke density rapidly decreases to 1.3% by this first charge spraying.

  The change in smoke density from time t2 to time t3 is a sudden change in the state of smoke in the enclosed space, which was black when viewed visually, so that the smoke disappears and the inside can be seen a little while seeing. It is a smoke-extinguishing action, which takes place during a charging spray of only 60 seconds.

  Subsequently, after the interval of 120 seconds is finished, the second charge spraying is performed at times t4 to t5, and thereafter, the charge spraying is repeated as t6 to t7, t8 to t9, and t10 to t11. The smoke concentration can be extinguished to approximately 0 percent, that is, no smoke at all by, for example, the fifth charge application.

  On the other hand, in the conventional characteristic 200 that is non-charged dispersion, similarly to the experimental characteristic of the present embodiment, at time t2 to t3, time t4 to t5, time t6 to t7, time t8 to t9, and time t10 to t11. The uncharged spraying is performed five times at an interval of 120 seconds, but the smoke density is gradually decreased, which is different from the experimental characteristic 100 of the present embodiment in the conventional non-charged experimental characteristic 200. The smoke concentration is almost double, and it is confirmed from the comparison of the experimental results that a significant smoke eliminating effect can be obtained in this embodiment.

  The smoke-extinguishing effect according to the present embodiment, which has been clarified from the experimental results shown in FIG. 5, is that the present inventor initially has a certain degree of fire-extinguishing effect at the stage where the idea of introducing charging spraying into fire extinguishing is obtained. Although it had a prospect, it was a remarkable result that had never predicted the smoke-removal effect.

  By the way, according to the experimental result of FIG. 5, from the result of the time transition of the smoke density at the time of charged spraying and non-charged spraying under the same spray water amount condition, according to the charged spraying according to this embodiment, the conventional non-charged spraying It has been confirmed that an equivalent smoke eliminating effect can be obtained with about one-fifth of the amount of sprayed water.

  FIG. 6 is a time chart showing the applied voltage applied from the voltage application unit 15 to the charging / spreading head 10 according to the present embodiment.

  FIG. 6A shows a case where a + V DC voltage is applied. In this case, negatively charged water particles are continuously dispersed.

  FIG. 6B shows a case where a DC voltage of −V is applied. In this case, positively charged water particles are continuously dispersed.

  FIG. 6C shows a case where an AC voltage of ± V is applied. In this case, negatively charged water particles are continuously dispersed in accordance with the change of the AC voltage during the positive half cycle period. During the period of the negative half cycle, positively charged water particles are continuously sprayed according to the change of the AC voltage.

  FIG. 6D shows a case in which a + V pulse voltage is applied at a predetermined interval. In this case, negatively charged water particles are intermittently scattered and no voltage is applied. Is a dispersion of uncharged water particles.

  FIG. 6E shows a case where a pulsed voltage of −V is applied at a predetermined interval. In this case, a period in which positively charged water particles are intermittently dispersed and no voltage is applied. In this case, water particles that are not charged are scattered.

  FIG. 6 (F) shows a case where a pulsed voltage of ± V is alternately applied with a predetermined interval, and in this case, negatively charged water particles and positively charged water particles are placed at intervals. During the period in which the voltage is alternately applied and no voltage is applied, uncharged water particles are scattered.

  As the voltage application unit 15 that supplies the charging voltage shown in FIG. 6 to the charging / spreading head 10, a commercially available boosting unit with a control input can be used. Some commercially available boosting units output DC0 to 20 kilovolts when DC0 to 20 volts is applied to the input, and such commercially available units can be used.

  FIG. 7 is an explanatory view showing another embodiment of the charging / spreading head using the cylindrical induction electrode portion. In FIG. 7A, in the charging and spreading head 10 of this embodiment, a head main body 36 is screwed and fixed to the tip of a falling pipe 34, and a water-side electrode portion 40 is interposed inside the head main body 36 via an insulating member 41. The earth cable 50 is connected to the top from here.

  An injection nozzle 38 is disposed below the water-side electrode unit 40, and the injection nozzle 38 includes a nozzle body (rotor) 38a and a nozzle head 38b. A cylindrical cover 56 is attached to the outside of the lower portion of the nozzle head 38 b via a fixing member 43. A cylindrical induction electrode portion 52 is disposed inside the opening of the lower end of the cover 56 by fixing the stopper ring 58 with screws.

  The cylindrical induction electrode portion 52 has a through hole 54 formed inside the cylindrical body as shown in a plan view taken out and shown in FIG. A cable 48 is connected to the cylindrical induction electrode portion 52 through a cover 56 made of an insulating material, and an applied voltage for charging is supplied.

  Even in the charging / spreading head 10 using the cylindrical induction electrode portion 52, when the water-based extinguishing agent pressurized from the spray nozzle 38 is sprayed to spray water particles, the water-side electrode portion 40 is set to 0 volts. For example, a voltage of several kilovolts is applied to the cylindrical induction electrode portion 52, and water particles radiated from the injection nozzle 38 pass through the space of the through hole 54 of the cylindrical induction electrode portion 52 in which an external electric field is generated. The charged water particles can be dispersed by being charged during the passing jetting process.

  FIG. 8 is an explanatory view showing another embodiment of the charging / spreading head using the wire mesh induction electrode portion. 8A, the head main body 36 is screwed and fixed to the lower part of the falling pipe 34, and the water-side electrode portion 40 is disposed therein via an insulating member 41. Is connected to the ground cable 50. A cover 62 is attached to the lower side of the injection nozzle 38 via a fixing member 43, and a wire mesh induction electrode portion 60 is attached to an opening inside the cover 62.

  The metal mesh induction electrode portion 60 has a planar shape shown in FIG. 8B and uses a metal wire mesh having a predetermined mesh. The cover 62 is an insulating material, and a voltage can be applied by connecting the voltage application cable 48 through the cover 62 to the wire mesh induction electrode portion 60.

  Even in the embodiment of FIG. 8, when water-based fire extinguisher is sprayed from the spray nozzle 38 and converted into water particles, the water-side electrode portion 40 is set to 0 volts, and a voltage such as several kilovolts on the wire mesh induction electrode portion 60 side. Is applied in the form of pulses or alternating current to generate an external electric field in the jet space from the jet nozzle 38, and the jet particles passing therethrough are charged when passing through the mesh opening of the wire mesh induction electrode portion 60. Thus, charged water particles can be dispersed.

  FIG. 9 is an explanatory view showing an embodiment of a charging / spreading head using a parallel plate induction electrode section. In the charging / spreading head 10 shown in FIG. 9, the spray nozzle 68 is fixed to the lower portion of the falling pipe 34 with screws. In this embodiment, the water-side electrode portion uses the falling pipe 34 itself, and therefore the ground cable 50 is directly connected to the falling pipe 34 using the connection ring 66.

  A ring holder 70 is fixed to the lower portion of the injection nozzle 68 with a screw, and a pair of plate-like holders 72a and 72b are arranged in parallel with the ring holder 70 in a state of being cantilevered downward. Parallel plate induction electrode portions 74a and 74b are fixed to the inner relative surfaces of the holders 72a and 72b. The plan view seen from the lower side of the parallel plate induction electrode portions 74a and 74b is arranged in parallel as shown in FIG.

  The holders 72a and 72b are made of an insulating material, and several kilovolts are formed by connecting the branch cables 48a and 48b penetrating the voltage application cable 48 at the branch portion 76 to the parallel plate induction electrode portions 74a and 74b, respectively. The applied voltage is applied.

  9 is also arranged in parallel with the falling pipe 34 serving as the water-side electrode portion and the tip side when spraying water-based extinguishing agent from the spray nozzle 68 and spraying it as spray particles. By applying a voltage of several kilovolts between the parallel plate induction electrode portions 74a and 74b, an external electric field is generated in the space between the parallel plate induction electrode portions 74a and 74b, and this external electric field is applied to the injection nozzle 68. In the process in which the water particles ejected from the water pass, the water particles can be charged and sprayed with the charged water particles.

  FIG. 10 is an explanatory view showing another embodiment of the charging / spreading head using the needle-like induction electrode portion. In the charging / spreading head 10 of FIG. 10A, an injection nozzle 68 is screwed and fixed to the tip of a falling pipe 34 used as a water-side electrode portion, and a connection ring 66 is attached to the falling pipe 34. The ground cable 50 is electrically connected.

  A ring holder 80 is attached to the tip end side of the injection nozzle 68 via a fixing member 43. A needle-like induction electrode portion 78 is attached to the lower part of the ring holder 80. The needle-like induction electrode portion 78 is bent in an inverted L shape and has a needle shape with its tip bent obliquely toward the opening of the injection nozzle 68. A plan view seen from below is shown in FIG. It becomes like this.

  A voltage application cable 48 is electrically connected to the needle-like induction electrode portion 78 attached to the ring holder 80.

  Even in this embodiment, when the water-based fire extinguisher is sprayed from the spray nozzle 68 to be converted into water particles and sprayed, the falling pipe 34 that functions as the water-side electrode portion and the needle-like shape disposed on the nozzle tip side By applying a voltage of several kilovolts between the induction electrode portion 78 and the external electrode, an external electric field is generated in the space between the nozzle opening and the tip of the needle-like induction electrode portion 78, and this is injected from the injection nozzle 68. The sprayed particles are charged during the spraying process for converting into water particles, and can be dispersed as charged water particles.

  Various structures shown in the above embodiment can be applied as the charging spray head 10 used in the present embodiment, but the present invention is not limited to this, and a charging spray head having an appropriate structure can be used.

  In addition, the charging voltage applied to the charging / spreading head is also set to 0 volt for the water-side electrode portion and a plus / minus applied voltage for the induction electrode portion side, a plus-only applied voltage, or a minus-only applied voltage. This can be determined as necessary according to the situation on the combustion member side to be extinguished.

The present invention includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

10: Charge spraying head 12: Pump unit 13: Manual valve 14: Water source 15: Voltage application unit 16: Pipe 18: Dedicated fire detector 20: Interlocking control relay device 22: Manual operation box 24: System monitoring control panel 26: Fire Sensor 28: Receiver 30: Pressure regulating valve 32: Automatic on-off valve 34: Falling pipe 36: Head body 38, 68: Injection nozzle 38a: Nozzle rotor 38b: Nozzle head 40: Water side electrode section 41: Insulating member 43 : Fixing member 42, 56, 62: Cover 44: Ring-shaped induction electrode part 45: Opening 46, 58, 674: Stopper ring 48: Voltage application cable 50: Earth cable 52: Cylindrical induction electrode part 54: Through hole 60: Wire mesh induction electrode portion 66: connection ring 70, 80: ring holder 72a, 72b: holder 74a, 74b: parallel plate induction electrode portion 76: branching portion 78: Jo induction electrode unit

Claims (6)

Is charged to the injection particles of water-based fire extinguishing agent at the electrification spray head for spraying by,
An injection nozzle connected to a pipe for supplying the water-based fire extinguisher and spraying the water-based fire extinguisher into particles by being sprayed into an external spray space ;
Before SL are arranged using a conductive material between the pipe and the injection nozzle, the water-side electrode that contacts the extinguishing agent for the aqueous supplied to the injection nozzle,
Disposed in the injection space, the external electric field caused a static-voltage by Rukoto are marked pressurized between the front Kisui side electrode unit, it is applied to the extinguishing agent water in the process of converting into particles by the injection space An induction electrode unit for charging the spray particles ;
Electrification spray head, characterized in that it comprises a.

Is charged to the injection particles of water-based fire extinguishing agent at the electrification spray head for spraying by,
An injection nozzle connected to a pipe for supplying the water-based fire extinguisher and spraying the water-based fire extinguisher into particles by being sprayed into an external spray space ;
Are arranged using the previous SL conductive material on the side which connects the injection nozzle of the pipe, and the water-side electrode that contacts the extinguishing agent for the aqueous supplied to the injection nozzle,
Disposed in the injection space, the external electric field caused a static-voltage by Rukoto are marked pressurized between the front Kisui side electrode unit, it is applied to the extinguishing agent water in the process of converting into particles by the injection space An induction electrode unit for charging the spray particles ;
Electrification spray head, characterized in that it comprises a.

3. The charging / spreading head according to claim 1, wherein the induction electrode portion is one of a metal having conductivity, a resin having conductivity, a rubber having conductivity, or a composite having a ring shape, A charging / spreading head having a cylindrical shape, a vertical flat plate shape, a parallel plate shape, a linear shape, or a wire mesh shape.
3. The charging / spreading head according to claim 1 or 2, wherein a voltage of the water-side electrode portion is set to zero volts and dropped to ground, and a predetermined charging voltage is applied to the induction electrode portion.
3. The charging / spreading head according to claim 1, wherein a part or all of the induction electrode is covered with an insulating material.
  3. The electrostatic charging head according to claim 1, wherein the water-based fire extinguishing agent is water, seawater, or water containing a chemical that enhances the fire extinguishing power.

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