JP2010131334A - Fire extinguishing equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide fire extinguishing equipment effectively and promptly extinguishing a fire in response to the location of a dangerous spot even if the dangerous spots are three-dimensionally scattered about. <P>SOLUTION: The fire extinguishing equipment comprises a reservoir tank 20 to reserve an aqueous film-forming foam extinguishing agent, a mixer vessel 30 to mix the aqueous film forming foam extinguishing agent and water so as to be an aqueous film-forming foam extinguishing agent solution, which is connected to the reservoir tank 20 and a water supply source, and an extinguisher heads 3a, 3b to discharge the aqueous film-forming foam extinguishing agent solution supplied from the mixer vessel 30 toward a fire spot. At least one of the extinguisher heads 3a, 3b is a spray head having neither air inlet nor deflector for bubbling. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to fire extinguishing equipment for extinguishing a certain section, and more specifically, liquid combustion products such as oil and alcohol, plastics, rubber, etc., such as factories where industrial robots and large hydraulic equipment are installed. , Where there are fire-prone areas where a solid combustion product such as vinyl alone or in combination causes a fire, or where there are three-dimensional fire hazard areas or fire The present invention relates to a fire-extinguishing equipment that can be suitably used as a fire-extinguishing equipment when a dangerous place exists inside a complicated device.

  Fixed foam fire extinguishing equipment is installed in facilities that handle liquid flammable hazardous materials such as oil and alcohol, parking spaces such as multistory parking lots and airplanes. In such a foam extinguishing equipment, a foaming device called a foam head that takes in air from an air inlet is used so that the foam extinguishing agent aqueous solution is foamed in the head (for example, Patent Document 1). And there exists a water film-forming foam fire extinguisher as a foam fire extinguisher used for such foam fire extinguishing equipment. This water film foam extinguisher is mixed with water using a mixer to make a foam extinguisher aqueous solution.If foamed from a foam head and sprayed against a flammable hazardous material such as oil or alcohol, the liquid is flammable. The surface of the dangerous material is covered with foam or water film, which prevents the contact between the air and the flammable dangerous material and can extinguish the fire.

  There is also known a fire extinguishing facility that uses a sprinkler head having a deflector instead of a foam head and sprays a water film-forming foam fire extinguisher aqueous solution radially so as to avoid foaming as much as possible (for example, Patent Documents 2 to 4). If such a sprinkler head is used, the water film-forming foam fire extinguisher aqueous solution is sprayed radially in a liquid state without bubbles. Can be reached.

Japanese Patent Application Laid-Open No. 07-265542 Japanese Patent Laid-Open No. 11-197264 JP-A-5-345045 Japanese Utility Model Publication No. 06-083048

  However, industrial robots and hydraulic equipment also use many parts made of solid flammable materials such as plastic, rubber, vinyl, etc., and these flammable materials and flammable liquids such as oil and alcohol In many cases, dangerous materials cause a combined fire. In addition, fires in such places are scattered three-dimensionally. On the other hand, in the fire extinguishing equipment using the foam head as described in Patent Document 1, since the foaming ratio of the fire extinguishing foam is high, the fire extinguishing foam tends to stay on the surface of the object to be protected. For this reason, even if the fire of a liquid flammable dangerous material can be extinguished, it is difficult to infiltrate the fire-extinguishing foam to the inside in a fire of equipment in which solid flammable members are intricately complicated. difficult. It is also difficult to make the fire-extinguishing bubbles accurately reach the three-dimensionally scattered fire-prone areas.

  In this regard, if a sprinkler head having a deflector as described in Patent Documents 2 to 3 is used and sprayed with a water film forming foam extinguishing agent solution as far as possible from foaming, the spray pressure pressure releases bubbles. Therefore, the water film-forming foam extinguishing agent aqueous solution can reach far. In addition, since the expansion ratio is small, the water film foam extinguishing agent aqueous solution penetrates quickly to the inside even in the case of a fire inside equipment composed of solid flammable materials such as plastic, rubber, vinyl, etc. However, to some extent, it is effective for extinguishing fires.

  However, when using a sprinkler head with a deflector to extinguish a fire with an aqueous foamed foam solution, the aqueous foamed fire extinguisher aqueous solution can change the direction of movement by the deflector, resulting in poor directivity and the spraying direction. Depending on the distribution density will be different. For this reason, it is difficult to effectively reach the water film-forming foam-extinguishing agent solution toward a three-dimensional dangerous place or the inside of a device having a complicated structure.

  The present invention has been made in view of the above-described conventional situation, and is a fire form in which a solid combustible member such as plastic, rubber, and vinyl and a liquid combustible dangerous material such as oil or alcohol are combined. Further, there is provided a fire extinguishing apparatus capable of performing effective and quick fire extinguishing according to the arrangement of the dangerous place even when the fire occurrence dangerous place is scattered three-dimensionally. This is a problem to be solved.

The fire extinguishing apparatus of the present invention is a storage tank for storing a water film forming foam fire extinguishing agent, and is connected to the storage tank and a water supply source to mix the water film forming foam fire extinguishing agent and water to form a water film forming foam extinguishing agent aqueous solution. In a fire extinguishing facility comprising a mixer and a fire extinguishing head for discharging a water film foam fire extinguishing chemical aqueous solution supplied from the mixer to a fire site,
At least one of the fire-extinguishing heads is a spray head that does not have a bubbling air intake and a deflector.

In the fire-extinguishing apparatus of the present invention, a water film-forming foam fire-extinguishing agent is used as a fire-extinguishing agent, and is mixed with water in a mixer to form a water-film-forming foam fire-extinguishing agent aqueous solution, which is discharged from the fire extinguishing head. Here, the water film fire extinguishing agent is the Ministry of Home Affairs Ordinance No. 26 of December 9, 1975, based on the provisions of Article 21-2, Paragraph 2 of the Fire Services Act (Act No. 186 of 1947). This refers to the water film-forming foam extinguisher specified in Article 2, Item 4 of the No. 2, which is a foam-extinguishing agent based on a synthetic surfactant, which produces a water film on cyclohexane. Therefore, the fire extinguishing apparatus of the present invention can effectively extinguish an oil fire. In addition, since at least one of the fire extinguishing heads is a spray head that does not have an air intake port for foaming, the water film forming foam fire extinguishing agent aqueous solution is discharged from the spray head with a strong spraying force. Moreover, since this spray head does not have a deflector, the spraying direction can be directional, and since the spray pressure is high, the spray head can be directly directed to the three-dimensionally scattered danger points. The water film forming fire extinguisher aqueous solution can be reached. Furthermore, since the water film forming foam fire extinguishing agent is used as the fire extinguishing agent, a water film can be formed on the oil surface of the oil fire to shut off the air, and the oil fire can be extinguished with a very small amount. In addition, since no foaming occurs, fire extinguishing foam can penetrate into the interior of equipment with complex structures and even when a fire is occurring deep in solid combustibles such as plastic, rubber, and vinyl. it can.
For this reason, water loss can be made extremely small as compared with the case where simple water is sprayed.

  Therefore, according to the fire extinguishing apparatus of the present invention, it is expected that a solid flammable member such as plastic, rubber and vinyl and a liquid flammable dangerous material such as oil and alcohol form a combined fire form, Furthermore, even when the fire-prone areas are three-dimensionally scattered, effective and quick fire extinguishing can be performed according to the arrangement of the dangerous areas.

  It is preferable that the spray head is disposed at a location where the water film-forming foam fire-extinguishing agent aqueous solution can be directly sprayed toward a protection target that can be a fire source. In this way, the water film foam fire extinguisher aqueous solution can be reliably discharged toward the protection target such as industrial robots and hydraulic equipment that can be a source of fire, so fire extinguishing is performed more reliably and accurately. be able to.

  The spray head preferably has an agitator in the flow path. The agitator is a member formed with a rotating flow path that is accommodated in a flow path in the head and guides the water film-forming foam fire-extinguishing chemical aqueous solution supplied to the spray head so as to apply a rotational force. By inserting this agitator into the spray head, the release of the water film forming fire-extinguishing agent aqueous solution from the head can be dispersed radially. Moreover, the discharge | release shape of water film-forming foam fire-extinguishing agent aqueous solution can be changed by changing the kind of agitator. For this reason, in consideration of the size and shape of the object to be protected, it is possible to achieve an appropriate water film foam extinguishing agent aqueous solution discharge shape with good fire extinguishing efficiency.

  Further, the fire extinguishing head may have both a spray head and a foam head. If this is the case, it can be quickly and effectively produced by spraying a foam fire-extinguishing chemical solution with a spray head against fires that are three-dimensionally dotted with fire hazards, such as industrial robots, or fires inside equipment with complex structures. The fire can be extinguished automatically, and for a flat oil fire, it can be effectively extinguished by the fire extinguishing foam discharged from the foam head, and an appropriate fire extinguishing method according to the fire type Can do.

(Embodiment 1)
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments embodying the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1, the fire extinguishing equipment of Embodiment 1 is installed in a protective compartment in a factory where industrial robots 1 a and 1 b are installed. A foam fire extinguishing agent tank 20 for storing a water film forming foam extinguishing agent (main component: fluorine surfactant), water supplied from a water supply device, and a foam extinguishing agent supplied from the foam extinguishing agent tank 20 are mixed. And a mixer 30. Further, the protective compartment 2 includes open spray heads 3a and 3b for spraying the foam fire-extinguishing chemical aqueous solution sent from the mixer 30, and fire detectors 40a and 40b. In FIG. 1, two open spray heads 3a and 3b and two fire detectors 40a and 40b are installed, but more may be provided depending on the shape and arrangement of the object to be protected.

The open type spray heads 3a and 3b are provided to hang down from the ceiling 2a so as to be sprayed toward the fire-prone areas of the industrial robots 1a and 1b (see FIG. 2). It is connected to the mixer 30. The mixer 30 is connected to the water supply apparatus 10 through the water supply pipe 11. Further, the mixer 30 has both a pressurizing pipe 21 a for sending water to the foam fire-extinguishing chemical tank 20 and pressurizing and a chemical pipe 21 b for sending the water film-forming foam extinguisher from the foam fire-extinguishing chemical tank 20 to the mixer 30. It is connected to the foam fire-extinguishing chemical tank 20 through a pipe.
In FIG. 2, open spray heads 3a and 3b are respectively installed directly above the industrial robots 1a and 1b. However, as shown in FIG. The spray heads 3c, 3d, 3e, and 3f can be provided so as to be sprayed from a plurality of directions.

  Further, outside the protection section 2, as shown in FIG. 1, the water supply device 10 is controlled by signals from the fire detectors 40a and 40b, and the sound / audio alarm device 41 and the rotating lamp 43 are driven. Is installed. The sound / voice alarm device 41 and the rotating lamp 43 can be installed in a plurality of places so that workers in the factory can perceive them, including the inside of the protection section.

  The water supply apparatus 10 has a water tank 12 as a water source, and is pumped up by a pump 13. The pump 13 is connected to an automatic valve 15 through a check valve 14. The automatic valve 15 is provided with a cylinder 15a for controlling opening and closing of the valve, and an automatic control bypass pipe 16 and a manual control bypass pipe 17 are connected to a lower space of the cylinder 15a. The automatic control bypass pipe 16 is connected to the water supply pipe 18 via an electromagnetic valve 16a, and the manual control bypass pipe 17 is connected to the water supply pipe 18 via a manual activation valve 17a. In addition, a pressure holding tank 19 is connected in the middle of the water supply pipe 18, and the water always filled in the water supply pipe 18 is constantly pressurized by the pressure holding tank 19. The automatic valve 15 is normally closed, and when the fire detector 43 detects a fire, the solenoid valve 16a is opened by the equipment activation signal from the control panel 42, and the water in the water pipe 18 that is constantly pressurized is supplied. Flows into the lower space of the cylinder 15a, the cylinder 15a is driven, and the automatic valve 15 interlocked with the cylinder 15a is opened. When the automatic valve 15 is opened, the pressure of the water supply pipe 18 is reduced, the pressure switch 19a is turned on, the power source is activated, the pump 13 is driven, and water is constantly supplied to the secondary side of the automatic valve 15. It is made to supply.

  The mixer 30 mixes the water sent from the water supply device 10 through the water supply pipe 11 and the water film foam extinguisher stored in the foam fire extinguishing chemical tank 20 so as to be 1 to 3% by weight. A water film forming foam extinguishing agent aqueous solution is supplied to the open spray head 3 via the fire extinguishing liquid pipe 9.

  Further, the control panel 42 sends an equipment activation signal to the electromagnetic valve 16a of the water supply device 10 to open the automatic valve 15a when both of the fire detection signals from the fire detectors 40a and 40b continue for 2 seconds or more. The sound / voice alarm device 41 and the rotating lamp 43 are driven. Even when three or more fire detectors are installed, the equipment activation signal is sent when the fire signals of at least two of the fire detectors continue for 2 seconds or more. The sound / voice alarm device 41 and the rotating lamp 43 may be activated when one of the plurality of fire detectors is activated. In this embodiment, the pressure switch 19a for driving the pump 13 is detected as a pressure drop in the water supply pipe 18, but of course, a pressure switch for detecting a pressure rise in the water supply pipe 11 and the fire extinguishing liquid pipe 9. It is also possible to drive the pump 13 by providing.

  As shown in FIGS. 4 and 5, the open spray heads 3 a and 3 b include a nozzle body 4, an agitator 5 inserted into the nozzle body 4, and a screw portion 4 b that is screwed into the nozzle body 4. A nozzle port 4a (see FIG. 4) is provided at the tip of the nozzle body 4, the agitator 5 is inserted into the nozzle body 4, and a spiral groove 5a is formed at the periphery. In addition, a taper hole 5b that opens substantially linearly toward the nozzle port 4a is provided through the center of the agitator 5 in the axial direction. The spray amount, spray range, and spray shape can be changed by changing the shape of the nozzle opening 4a and the shape of the agitator 5. A spray head in which the taper hole 5b is not penetrated can also be used. The open type spray heads 3 a and 3 b have a screw portion 7 that is screwed into the fire extinguishing liquid pipe 9.

Next, the effect of this fire extinguishing apparatus is demonstrated.
As shown in FIG. 6, when a fire occurs from the industrial robot 1 a in the protection section 2, the fire detectors 40 a and 40 b are activated and a fire signal is transmitted to the control panel 42. When the fire signal is transmitted for more than 2 seconds for both of the fire detectors 40a and 40b, the control panel 42 drives the sound / voice alarm device 41 and the rotating lamp 43 to notify the occurrence of the fire by sound and light, and the water supply device An equipment start signal is sent to the ten electromagnetic valves 16a to open the automatic valve 15. When the automatic valve 15 is opened, the pressure of the water supply pipe 18 that has been constantly pressurized by the pressure-holding tank 19 is lowered, the pressure switch 19a is turned on, the power source is activated, and the pump 13 is driven to drive the water tank. 12 water flows into the secondary side of the automatic valve 15 through the check valve 14 and the water pipe 18. Thus, water is supplied to the mixer 30 through the water supply pipe 11. Then, a part of the water supplied to the mixer 30 is sent to the foam fire extinguishing chemical tank 20 through the pressurizing pipe 21a, whereby the foam fire extinguishing chemical tank 20 is pressurized, and the water film forming foam extinguisher becomes the chemical piping. It is sent to the mixer 30 through 21b and mixed with water (the concentration of the foam is 1 to 3% by weight). The aqueous film-forming foam fire extinguisher aqueous solution obtained by mixing with water in this way is sent to the open spray heads 3a and 3b through the fire-extinguishing liquid pipe 9.

  The water film foam extinguishing agent aqueous solution sent to the open spray heads 3a and 3b enters from the screw portion 7 shown in FIGS. 4 and 5, and is discharged from the nozzle port 4a through the tapered hole 5b and the spiral groove 5a. . At this time, the aqueous water-foaming foam fire extinguisher aqueous solution forms a rotating flow when passing through the spiral groove 5a of the agitator 5, and the aqueous water-foaming foam extinguisher aqueous solution released from the nozzle port 4a by this rotating flow spreads radially. It becomes. Moreover, since the open type spray heads 3a and 3b are not provided with a deflector for blocking the progress of the aqueous water film-forming foam fire extinguisher aqueous solution, the spray direction can be directional, The water film-forming foam extinguishing agent aqueous solution can be directly reached toward the robots 1a and 1b. In this embodiment, the positions of the open spray heads 3a and 3b are directly above the industrial robots 1a and 1b (see FIG. 2). However, as shown in FIG. 3, the sizes of the industrial robots 1a and 1b are large. In addition to the open spray heads 3a and 3b, 3c, 3d, 3e, and 3f are arranged according to the sheath height and shape, and the type of the agitator 5 is optimized so that the location of the dangerous place It is possible to perform effective and quick fire extinguishing according to the situation.

  Further, since the open type spray heads 3a and 3b do not have an air intake port, the water film-forming foam fire extinguisher aqueous solution is discharged in a liquid state with little foaming. For this reason, the water film forming fire extinguisher aqueous solution quickly penetrates into the industrial robot 1a having a complicated structure and can extinguish the fire. Moreover, even in the case of an oil fire where an oil leaks from an industrial robot and ignites, the water film foam extinguishing agent aqueous solution released from the open spray heads 3a and 3b is moderate in the process of scattering in the air. The oil surface can be covered with a foam or water film to extinguish the fire. For this reason, the water film-forming foam extinguishing agent aqueous solution is sprayed on the entire industrial robot 1a, and an internal fire and an oil fire can be effectively extinguished.

  Even if a fire has occurred, even if the automatic valve 15 is not opened for some reason, and the automatic water supply to the mixer 30 is not performed, the manual start valve 17a is manually detected by the person who has found the fire. By opening, the automatic valve 15 is opened, and fire extinguishing similar to the above can be performed. Furthermore, a button that can directly send a facility activation signal may be arranged so that a person who perceives a fire can directly activate the pump.

  As described above, in the fire extinguishing equipment of the first embodiment, since the positions of the open spray heads 3a and 3b are determined according to the installation position and shape of the protection target, effective and quick fire extinguishing is aimed at the fire occurrence point. Can be done. In addition, since the fire extinguishing equipment is driven only when both the fire detectors 40a and 40b transmit 2 seconds or more, there is little possibility that the water film foam fire extinguisher aqueous solution is released due to a malfunction due to the fire detector or noise. Damage to expensive and precise industrial machines such as industrial robots can be prevented.

  The positions of the open spray heads 3a and 3b are preliminarily tested using a model protection object, and the spraying direction, spray range, spray amount, etc. are optimally set in advance for the protection object. It is preferable to install it after finding it.

(Embodiment 2)
As shown in FIG. 7, the fire extinguishing equipment of the second embodiment is provided with an automatic valve 50 having the same mechanism as the automatic valve 15 in the first embodiment, and the automatic valve 50 has a cylinder 50a. Is the same. However, the upper part and the lower part of the cylinder 50a are in communication with each other through an orifice hole, and the lower part of the cylinder 50a and the water supply pipe 18 which is the primary side of the automatic valve 50 are also connected to each other. The water pipe 18 and the upper and lower portions of the cylinder 50a are in communication. The upper part of the cylinder 50a and the normally closed solenoid valve 53 are connected via a pressure release pipe 51 for automatic control. When the fire detectors 40a and 40b detect a fire, the equipment is started from the control panel 42. The electromagnetic valve 53 is opened by the signal, the upper pressure in the cylinder 50a is released, and the automatic valve 50 interlocked with the cylinder 50a is opened. The upper part of the cylinder 50a and the normally closed manual start valve 54 are connected via a manual control pressure release pipe 52, and the solenoid valve 53 is opened by manually opening the manual start valve 54. As in the case, the upper pressure in the cylinder 50a is released, and the automatic valve 50 interlocked with the cylinder 50a is opened.
Other configurations are the same as those of the fire extinguishing apparatus according to the first embodiment, and the same components are denoted by the same reference numerals and detailed description thereof is omitted.

  In the fire extinguisher of Embodiment 2 configured as described above, as shown in FIG. 8, when a fire occurs from the industrial robot 1a in the protection section 2, the fire detectors 40a and 40b are activated, and the control panel A fire signal is transmitted to 42. When the fire signal is transmitted for more than 2 seconds for both the fire detectors 40a and 40b, the control panel 42 drives the sound / voice alarm device 41 and the rotating lamp 43 to notify the occurrence of the fire by sound and light, An equipment activation signal is sent to the electromagnetic valve 53 of the device 10 to open it. Thereby, the pressure in the upper part of the cylinder 50a is released and the automatic valve 50 is opened. When the automatic valve 50 is opened, the pressure of the water supply pipe 18 that has been constantly pressurized by the pressure-holding tank 19 decreases, the pressure switch 19a is turned on, the power source is activated, and the pump 13 is driven to drive the water tank. 12 water flows into the secondary side of the automatic valve 50 through the check valve 14 and the water pipe 18.

  Even when a fire has occurred, even if the automatic valve 50 is not opened for some reason, and the automatic water supply to the mixer 30 is not performed, the manual start valve 54 is manually detected by the person who has found the fire. By opening, the automatic valve 50 is opened, and the same fire extinguishing can be performed. Furthermore, an activation button that can transmit a facility activation signal may be arranged so that a person who perceives a fire can directly activate the pump.

(Embodiment 3)
As shown in FIG. 9, the fire extinguishing equipment according to the third embodiment has foam heads 60 mounted at regular intervals in the vertical and horizontal directions in addition to the open spray heads 3a and 3b according to the first embodiment. Connected to the device. In addition, the fire detectors 40a and 40b of the first embodiment are connected to a control device (not shown). The control device receives a fire signal from the fire detectors 40a and 40b, and the foam extinguisher supply device transfers the foam head 60 to the foam head 60. An aqueous foam solution is supplied.

  In this fire extinguisher, in addition to the open spray heads 3a and 3b that can handle general fires, the foam head 60 suitable for oil fires is also provided. The fire can be effectively extinguished. In addition, since the open type spray heads 3a and 3b are installed according to the installation position and shape of the protection target, it is possible to perform effective and quick fire extinguishment toward the fire occurrence point, etc. It is possible to achieve the same function and effect as the above.

  The present invention is not limited to the description of the embodiments of the above invention. Various modifications are also included in the present invention as long as those skilled in the art can easily conceive without departing from the scope of the claims.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used as fire extinguishing equipment for a fire in a factory or the like where three or more fire-prone areas are scattered, such as industrial robots and welding machines.

It is the schematic diagram which showed the normal state of the fire extinguisher of Embodiment 1. It is a perspective view which shows arrangement | positioning of the open type spray head in the fire extinguishing apparatus of Embodiment 1. FIG. It is a perspective view which shows the modification of arrangement | positioning of the open type spray head in the fire extinguisher of Embodiment 1. FIG. It is a disassembled perspective view of the open type spray head used in Embodiment 1 and Embodiment 2. FIG. It is a perspective view of the open type spray head used in Embodiment 1. FIG. It is the schematic diagram which showed the state at the time of the fire outbreak of the fire extinguishing apparatus of Embodiment 1. It is the schematic diagram which showed the normal state of the fire extinguishing apparatus of Embodiment 2. It is the schematic diagram which showed the state at the time of fire outbreak of the fire extinguishing apparatus of Embodiment 2. It is a perspective view which shows arrangement | positioning of the fire extinguishing head in the fire extinguishing apparatus of Embodiment 3.

Explanation of symbols

20 ... Reservoir tank 30 ... Mixer 3a, 3b ... Spray head (open type spray head)
5 ... Agitator 40a, 40b ... Fire detector 60 ... Foam head

Claims (4)

A storage tank for storing a water film-forming foam fire extinguishing agent, a mixer connected to the storage tank and a water supply source to mix the water film-forming foam fire-extinguishing agent and water into a water film-forming foam fire-extinguishing agent aqueous solution, In the fire extinguishing equipment equipped with a fire extinguishing head that discharges the water film foam extinguishing chemical aqueous solution supplied from the mixer to the fire site,
At least one of the fire-extinguishing heads is a spray head that does not have a foaming air intake and a deflector.   2. The fire extinguishing equipment according to claim 1, wherein the spray head is arranged to be able to directly spray the water film-forming foam fire-extinguishing chemical aqueous solution toward an object to be protected that can become a fire source.   The fire extinguishing equipment according to claim 1 or 2, wherein the spray head has an agitator in a flow path.   The fire-extinguishing equipment according to any one of claims 1 to 3, wherein the fire-extinguishing head includes a spray head and a foam head.

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