JP4253766B2 - Mist discharge device for fire fighting - Google Patents

Description

The present invention has an open space, for example, it relates extinguishing mist at a given protected area in the factory extinguishing mist emission equipment to extinguish by spraying the fire source.

  A conventional mist spray fire extinguishing system is used as a fire extinguishing equipment in a protection section (closed space) where water damage damage cannot occur, such as a computer room. In this mist spray fire extinguishing system, a spray nozzle that discharges fire mist is installed on the ceiling of the protection section, and an electric valve is provided in the water supply pipe that supplies the spray nozzle with water for fire extinguishing from the fire pump equipment, In the event of a fire, the spray control unit controls the opening and closing of the motor-operated valve so that fire extinguishing mist is ejected from the spray nozzle.

Japanese Patent Application Laid-Open No. 11-70181

  As described above, the conventional mist spray fire extinguishing system is only used in a closed space such as a computer room, and has a high ceiling such as in a factory and is substantially open. The idea is to set a fire protection mist discharge device in the protection area only in the specified protection area, that is, in the open space, the floor area around the area where equipment that cannot cause water damage exists. It does not exist. Therefore, as a conventional fire extinguishing system in a large space such as a factory, for example, there is no choice but to use a watering system of a system that causes water damage damage to the entire area, or a gas-based or powder-based fire extinguishing system, It was a fact.

  A technical problem of the present invention is to enable a fire extinguishing effect to be exerted on a local floor surface in an open space without causing damage such as water loss.

The fire-extinguishing mist discharging apparatus according to the present invention includes a fire-extinguishing mist discharge in which a plurality of spray nozzles that discharge fire-extinguishing mist are arranged opposite to each other across a protection area set on the side of a machine tool in an open space. The apparatus includes a plurality of pairs of spray nozzles arranged opposite to each other across the protection area along the outline of the protection area, and a group of spray nozzles on the machine tool side sandwiching the protection area The spray nozzle mist on the other side sandwiching the protection region is set such that the main flow direction of the spray mist is set closer to the foot of each spray nozzle on the machine tool side than the middle portion of the floor surface in the protection region. The main flow directions of these spray mists are set so as to intersect with the spray mist main flow directions of the respective spray nozzles on the machine tool side corresponding to each other on the floor surface near the feet.

Moreover, fire extinguishing mist emitting apparatus according to the present onset Ming, among spray nozzle comprising a plurality of sets face each other along the contour of the protective region, two sets of spray nozzles located at both ends of the protection area, the respective ejection The main flow direction of the mist is set so as to face the inside of the protection region with respect to a line connecting a pair of spray nozzles which are constituent units of these sets when viewed in plan from above.

In the fire-extinguishing mist discharging apparatus according to the present invention, when the mist is discharged from the spray nozzles arranged opposite to each other across the protective region set on the side of the machine tool in the open space, the bumped mist is in the protective region. Stays inside. Thereby, the fire-extinguishing effect can be exhibited with respect to the local floor surface in the open space which is not closed space.
By the way, when the protection area is set at a position adjacent to the machine tool in this way and the spray nozzle is disposed opposite to the machine tool side and the opposite side across the protection area, the machine tool side becomes a wall surface, The spray nozzle is too close to the protection area, and an upward air flow along the wall surface is likely to occur. For this reason, when mist is discharged from a pair of spray nozzles arranged opposite to each other across the protective region, for example, toward the intermediate floor between them, the mist is discharged to the end on the wall surface side in the protective region. Besides, it is difficult to make the mist concentration near the floor under the influence of the rising airflow.
In the present invention, a plurality of pairs of spray nozzles arranged opposite to each other across the protection area are installed along the outline of the protection area, and a group of spray nozzles on the machine tool side sandwiching the protection area is The spray nozzle mist on the other side sandwiching the protection region is set such that the main flow direction of the spray mist is set closer to the foot of each spray nozzle on the machine tool side than the middle portion of the floor surface in the protection region. Since the main flow direction of the spray mist is set so as to intersect the spray mist main flow direction of each spray nozzle on the machine tool side corresponding to each other on the floor surface near the foot, Mist can be discharged near the foot of the spray nozzle on the machine side, and the mist concentration near the floor on the machine tool side can be increased. Therefore, the mist can sufficiently act near the floor on the wall surface side in the protection area.

The mist from the spray nozzles arranged to face each other, after colliding, partially escapes in the lateral direction with respect to the discharge direction.
In the fire-extinguishing mist discharging apparatus according to the present invention , two sets of spray nozzles positioned at both ends of the protection area among the spray nozzles arranged to face each other along the outline of the protection area, Since the main flow direction is set so as to face the inside of the protection area rather than the line connecting the pair of spray nozzles that are the structural units of these groups when viewed from above, it is against the mist that tries to escape in the lateral direction. Can be blocked and pushed into the protected area.

Embodiment 1 FIG.
FIG. 1 is a plan view schematically showing the arrangement of spray nozzles with respect to the protection area of the fire extinguishing mist discharging apparatus according to the present invention, and FIG. 2 is a side view schematically showing the arrangement of spray nozzles with respect to the protection area.

  The fire extinguishing mist discharge device of this embodiment includes a plurality of spray nozzles 2a to 2e and 3a to 3e that discharge fire extinguishing mists 1A and 1B on both sides of a predetermined protection area A in an open space such as a factory. Oppositely arranged.

  The protection area A is, for example, a manufacturing process of a factory that does not want to cause damage due to water damage. In this case, the protection area A is set to a rectangular area of 3 m in length and 5 m in width on the floor on the side of the machine tool 4. ing. The spray nozzles 2a to 2e and 3a to 3e are installed along the contour of the protection area A. The spray nozzles 2a to 2e located on the machine tool side and the spray nozzles 3a to 3e located on the counter machine tool side are these The mainstreams 1a and 1b of the mists 1A and 1B discharged from the main body are basically opposed to each other so that they can intersect on the floor surface in the protection area A.

  More specifically, among the spray nozzle groups located on the machine tool side, the three center spray nozzles 2b, 2c, and 2d are all set to an installation height of 80 cm and an inclination angle of 40 °. That is, the mainstream of each of the jet mists 1A has a height that does not interfere with the movement of the machining table 4a, which is a movable part of the machine tool 4, and the vicinity of the feet where the mist concentration tends to be thin due to the influence of the machine tool 4 being a wall surface. It is set so that the direction 1a faces.

  On the other hand, among the spray nozzle group located on the side opposite to the machine tool, the three center spray nozzles 3b, 3c and 3d are all set to an installation height of 84 cm and an inclination angle of 15 °. In other words, the spray nozzles 3b, 3c, 3d are ejected by making the installation height slightly higher than the spray nozzles 2b, 2c, 2d on the machine tool side that make a pair with them and making the nozzle direction upward. The points P1, P2, P3 on the floor surface near the feet of the spray nozzles on the machine tool side with respect to the directions of the main flow 1a of the spray mist 1A of the spray nozzle on the machine tool side corresponding to the main flow 1b direction of the mist 1B, respectively. It is set to intersect (collision). In other words, the spray nozzles 2b, 2c and 2d on the machine tool side and the spray nozzles 3b, 3c and 3d on the counter machine tool side which are paired with the spray nozzles 2b, 3c and 3d are counteracted in a vertical plane passing through a line connecting each other. The direction of the spray nozzles 3b, 3c, 3d on the machine side is upward, and the spray nozzles 3b, 3c, 3d are installed downward toward the points P1, P2, P3 on the floor near the machine tool. Thereby, the mist concentration near the floor on the machine tool side in the protection area A is increased, and the mist concentration near the floor on the machine tool side is prevented from being diluted by the above-described rising airflow generated on the machine tool side. At the same time, the extrapolated lines 1c and 1d of the mists 1A and 1B discharged from the spray nozzles 2b, 2c, 2d, 3b, 3c and 3d cover the entire protection area A, and the upper surfaces of the mists weaving them become gentle. The cross section of the protection area A viewed from the vertical plane can be made closer to a rectangle.

  By the way, after the mists from the spray nozzles 2b, 3b and 2c, 3c and 2d, 3d arranged so as to collide with each other, a part of the mist is removed laterally with respect to the discharge direction. Therefore, among a plurality of spray nozzles arranged opposite to each other along the outline of the protection area A, two sets of spray nozzles 2a, 3a and 2e, 3e located at both longitudinal ends of the protection area A are respectively ejected mist 1A. , 1B in the direction of the main flow 1a, 1b when viewed from above in plan view, it is set so as to face the inside of the protection region rather than the line connecting the pair of spray nozzles 2a, 3a and 2e, 3e, which are constituent units of these sets ing. As a result, it is possible to block the mist that tries to escape in the lateral direction caused by the collision of the mist from the three sets of spray nozzles 2b, 3b and 2c, 3c and 2d, 3d on the center side. It can be pushed into the protection area A.

  The spray nozzles 2a and 2e located on the machine tool side are both installed at a height of 83 cm and an inclination angle of 20 °, and the spray nozzles 3a and 3e located on the counter machine tool side are both set at an installation height of 83 cm and the angle of depression. By setting each to 20 °, the points P4 and P5 at which the directions of the main flow 1a and 1b of the mists 1A and 1B of each pair of spray nozzles 2a and 3a and 2e and 3e are higher than the floor surface near the machine tool. It almost crosses (collises) at, and blocks the entire mist that tries to escape laterally.

  As described above, the mist can be locally retained in the vicinity of the floor surface, which is a dangerous area, and the fire extinguishing effect can be exerted on the local portion while maintaining the concentration of the mist.

Embodiment 2. FIG.
FIG. 3 is a configuration diagram schematically showing a mist spray fire extinguishing system to which the fire extinguishing mist discharging apparatus according to the present invention is applied , FIG. 4 is an explanatory diagram showing an operation flow in the automatic mode, and FIG. 5 is in the manual mode. FIG. 3 is an explanatory diagram showing the flow of the operation, and in FIG. 3, the same parts as those in the first embodiment are denoted by the same reference numerals. In the description, reference is made to FIG. 1 and FIG.

  In the mist spray fire extinguishing system of this embodiment, the floor surface of the side of the machine tool in an open space such as a factory is set as a protection area (protection target part) A, and when a fire in the protection area A is detected, a fire signal is generated. A smoke detector 11 and a flame detector 12 to be output, a control unit 13 for receiving a fire signal from each of the sensors 11 and 12 and outputting a start signal, and a pressurized gas container based on the start signal from the control unit 13 A container valve 15 as an opening device for opening 14, a pressure regulator 16 for adjusting the pressure of a pressurized gas (for example, nitrogen gas) from the pressurized gas container 14, and a pressure sent via the pressure regulator 16. A water tank 17 that pressurizes and discharges fire-extinguishing water with pressurized gas from the gas container 14 and is disposed opposite to both sides across the protection area A. The fire-extinguishing water discharged from the water tank 17 is made into a mist to form a protection area Duplicated to A The spray nozzles 2 (2a to 2e) and 3 (3a to 3e) have a fire extinguishing mist discharge device 10 and an operation unit 18 for operating the control unit 13. Manual operation is possible. The fire extinguishing mist discharge device 10 has the same configuration as the fire extinguishing mist discharge device described in the first embodiment, and therefore, the description of the first embodiment can be applied in detail. Therefore, the fire-extinguishing mist discharging apparatus 10 has all the functions of the first embodiment.

  Next, the operation of the mist spraying fire extinguishing system of the present embodiment having the above configuration will be described based on FIGS. 4 and 5 with reference to FIGS. In the automatic mode (FIG. 4), when a fire occurs in the protection area A, the smoke detector 11 first detects smoke generated from the fire source, but if the smoke concentration is within the set threshold value. If a threshold is exceeded without outputting a fire signal, a fire signal is output to the control unit 13. In this smoke detector 11, a pre-level (forecast) lower than that is set as a threshold value in addition to the fire level, and the control unit 13 is a pre-fire signal input from the smoke detector 11. , Inform the security room, etc., and display a pre-fire indication to inform you that a fire may have occurred. In addition, if the fire signal is input from the smoke detector 11, the control unit 13 transfers the same information to cause the security room or the like to perform a fire display or alarm.

  When a flame is generated from a fire source and a fire is detected by the flame detector 12 and a fire signal is input to the control unit 13 from both the flame detector 12 and the smoke detector 11, the control unit 13 Report to fire and display a fire to inform that a fire has occurred. In addition, since the start condition is established together with the input of the fire signal of the smoke detector 11, the start signal is output to the container valve 15 to open the pressurized gas container 14 and at the same time start to the security room or the like. A display is made to notify that the pressurized gas container 14 has been opened, and the machine tools in and around the protection area A are stopped. And the water for fire extinguishing in the water tank 17 is pressurized and discharged by the pressurized gas (nitrogen gas) from the pressurized gas container 14, and the spray nozzles 2 a to 2 e disposed opposite to each other with the protection area A interposed therebetween. And 3a to 3e are sprayed and dispersed in the protection area A. Evaporation of the sprayed mist removes the heat of vaporization from the fire source to cool and extinguish it, and the evaporated steam covers the fire source and extinguishes suffocation.

Even if the automatic mode is set, if there is a manual operation (release switch ON operation) by the operation unit 18 by a guard or the like as shown in FIG. 5, the activation condition is satisfied, and an activation signal is output to the container valve 15. the pressurized gas container 14 Te is opened, the mist is ejected dispersed in protected area a from the spray nozzle 2a~2e and 3a~3e both sides as described above, when the cooling extinguishing and suffocating extinguishing fire source is performed At the same time, the activation display to the security room and the machine tools in and around the protection area A are stopped.

  In this way, by arranging the spray nozzles 2a to 2e and 3a to 3e that spray and disperse the fire-extinguishing water discharged from the water tank 17 in a mist form on both sides across the protective region, for example, a factory or the like It is possible to concentrate and protect the dangerous area in the building, and it is possible to construct a disaster prevention facility adapted to the use rather than the entire building. It should be noted that fire extinguishing equipment such as automatic fire alarm equipment and sprinklers may be provided in factories or the like as buildings, and by combining with overall disaster prevention equipment, safer equipment can be obtained.

In addition, since the mist discharge apparatus 10 for fire extinguishing in the mist spray fire extinguishing system of this embodiment has the same configuration as the mist discharge apparatus for fire extinguishing described in the first embodiment as described above, The operation and effect are as described in the first embodiment. In other words, the mist concentration near the floor on the side from which the mist is released can be increased while being released toward the end of the protection area A toward the feet of the user in the protection area A. Therefore, when the protection area A is set at a position adjacent to the machine tool 4 or the like, the direction of the spray mist main flow 1a of each spray nozzle 2 arranged on the machine tool 4 side that is in the wall surface state is directed close to one's feet. By doing so, it is possible to prevent the mist concentration from becoming dilute near the floor on the machine tool 4 side that is in the wall surface state in the protection area A, and to obtain a fire extinguishing effect.
In addition, it is possible to block against mist that is about to escape in the lateral direction by two sets of spray nozzles 2a, 3a and 2e, 3e located at both ends of the protection area A, set so as to face the inside of the protection area A. This can be pushed into the protection area A.

It is a top view which shows roughly arrangement | positioning of the spray nozzle with respect to the protection area | region of the fire-fighting mist discharge apparatus which concerns on Embodiment 1 of this invention. It is a side view which shows roughly arrangement | positioning of the spray nozzle with respect to the protection area | region of the fire-extinguishing mist discharge apparatus which concerns on Embodiment 1. FIG. It is a block diagram which shows schematically the mist spray fire extinguishing system which concerns on Embodiment 2 to which the mist discharge | release apparatus for fire extinguishing of this invention is applied . It is explanatory drawing which shows the flow of operation | movement at the time of automatic mode of the mist spraying fire extinguishing system which concerns on Embodiment 2. FIG. It is explanatory drawing which shows the flow of operation | movement at the time of the manual mode of the mist spraying fire extinguishing system which concerns on Embodiment 2. FIG.

Explanation of symbols

1A, 1B Fire extinguishing mist, 1a, 1b Main mist of jet mist, A protection area, 2b, 2c, 2d Spray nozzle group on one side, 3b, 3c, 3d Spray nozzle group on the other side, 2a, 3a, 2e, 3e Two sets of spray nozzles at both ends, P1, P2, P3, P4, P5 Mist main intersection, 11 Smoke detector (sensor), 12 Flame detector (sensor), 13 Controller, 15 Container Valve (opening device), 17 water tank.

Claims (2)

A fire-extinguishing mist discharge device in which a plurality of spray nozzles that discharge fire-extinguishing mist are arranged opposite to each other across a protection area set on the side of a machine tool in an open space,
A plurality of pairs of spray nozzles disposed opposite to each other across the protection area are installed along the outline of the protection area, and a group of spray nozzles on the machine tool side sandwiching the protection area includes their ejection mist. The spray nozzle group on the other side sandwiching the protection area is set so that the main flow direction of the machine is directed closer to the foot of each spray nozzle on the machine tool side than the middle part of the floor surface in the protection area. The fire mist discharge device for fire extinguishing is set so as to intersect at the floor surface near the feet with respect to the jet mist main flow direction of each spray nozzle on the machine tool side to which the main flow direction respectively corresponds.   Among the spray nozzles that are arranged to face each other along the outline of the protection region, two sets of spray nozzles positioned at both ends of the protection region are arranged in such a manner that the main flow direction of each spray mist is viewed from above in a plan view. The fire-extinguishing mist discharging apparatus according to claim 1, wherein the mist discharging apparatus for fire extinguishing is set so as to face the inside of the protection region with respect to a line connecting a pair of spray nozzles which are constituent units of the above.

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