JP3852069B2 - Water spray head - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water spray head disposed in a tunnel or the like.
[0002]
[Prior art]
A water spray head is disposed on the upper wall surface in the tunnel. This water spray head includes a near throw nozzle and a long throw nozzle, and obtains a square water spray distribution by spraying water from both nozzles.
[0003]
[Problems to be solved by the invention]
When a cable rack for electric equipment or the like is projected on the upper wall surface of the tunnel, the water spray head must be disposed at a low position so as not to be affected by the cable rack. For this reason, the water spray head cannot be disposed at the design position, and there may be a case where a cubic water spray distribution for spraying water without waste in the rectangular and three-dimensional protection range may not be obtained.
[0004]
In particular, if the long-throw nozzle is arranged at a position lower than the design position, the distance of fire-fighting water discharged from the nozzle is shortened, making it difficult to reach the tip of the design sprinkling distribution, and water spray especially above the protection range. It becomes difficult to spray water on the part of the side facing the head. Therefore, it is difficult to spray water over the entire protection range.
[0005]
In view of the above circumstances, an object of the present invention is to obtain a three-dimensional square water spray distribution that can reliably cover the protection range.
[0006]
[Means for Solving the Problems]
In this invention, a near throw nozzle and a far throw nozzle having different radiation angles are provided on the main body, and a deflector having a proximal end fixed to the far throw nozzle by a support arm is disposed in front of the opening of the long throw nozzle . In the water spray head;
The deflector includes a V-shaped reflecting plate having a V-shaped reflecting surface that collides and disperses water for extinguishing, and a side edge of the V-shaped reflecting plate , and is inclined toward the reflecting surface. And an inclination restraining plate having a restraining surface that restricts the spread of the fire-extinguishing water dispersed by the V-shaped reflecting plate in the lateral direction, and the reflecting surface of the V-shaped reflecting plate releases the fire-extinguishing water. The water spray head is characterized in that the width becomes wider from the proximal end to the distal end where the support arm is connected .
[0007]
In this invention, a near throw nozzle and a far throw nozzle having different radiation angles are provided on the main body, and a deflector having a proximal end fixed to the far throw nozzle by a support arm is disposed in front of the opening of the long throw nozzle. In the water spray head;
The deflector includes a V-shaped reflecting plate having a V-shaped reflecting surface that collides and disperses water for extinguishing, and a side edge of the V-shaped reflecting plate , and is inclined toward the reflecting surface. comprises an inclined retainer plate having clamping surfaces for restricting the spread in the lateral direction of the fire extinguishing water dispersed by the V-shaped reflection plate, clamping surfaces of the inclined holding plate is, in the direction of emission of the fire extinguishing water A water spray head characterized in that the width becomes narrower from the proximal end to which the support arm is connected toward the distal end .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The present inventor studied and repeated experiments on how to obtain a square water spray distribution as designed.
As a result, it was found that the deflector disposed in front of the nozzle opening of the main body only needs to have a substantially W-shaped cross section in the nozzle direction perpendicular to the discharge direction.
[0009]
Further, if the width of the W-shaped deflector inclination-reducing plate is narrowed from the base end to the tip end, it is possible to properly regulate the spreading of the water for extinguishing water in the lateral direction, and the V-shape of the deflector. If the center angle of the reflector is set to the tip alignment angle of the sprinkling distribution, for example, 135 degrees, the tip of the sprinkling distribution is aligned on the same straight line, and a part of the tip of the water spray distribution having a rectangular shape does not jump out.
[0010]
【Example】
An embodiment of the present invention will be described with reference to FIGS.
A cable rack 2 protrudes from the upper part of the wall surface 1 of the tunnel Tn, and a water spray head 3 is provided below the cable rack 2.
In addition, FIG. 7 shows the right half of the water spray distribution on the tunnel Tn road surface 19 on the upper side in the cross section of the tunnel Tn and the water spray shape with respect to the tunnel cross section from the water spray head 3 on the upper side, Since it is the same shape as the right, it is omitted.
[0011]
The water spray head 3 includes a main body 6 connected to a water supply pipe (not shown), and a near throw nozzle 4 and a far throw nozzle 5 screwed to the main body 6.
The central axes 4c and 5c of the nozzles 4 and 5 are inclined at different angles α and β with respect to the perpendicular V. The inclination angle is appropriately selected as necessary. For example, the angle α is 20 degrees and the angle β is 160 degrees.
[0012]
The near throw nozzle 4 has a built-in spiral 7, and a dustproof cap 8 is provided at the tip thereof. The dust cap 8 is automatically blown away by water discharge.
[0013]
A deflector 10 is provided at the tip of the long throw nozzle. The support arm 11 of the deflector 10 is fixed to the nozzle 5 by a presser nut 12, and the deflector 10 is opposed to the front surface of the nozzle opening 5a with a gap.
[0014]
The deflector 10 is continuous with the V-shaped reflecting plate 15 having a V-shaped reflecting surface that collides and disperses water for extinguishing , and the side edge 15a of the V-shaped reflecting plate 15 , and in the direction of the reflecting surface. inclined to, and includes an inclined holding plate 16 to have a restraining surface for restricting the spread in the lateral direction of the dispersed extinguishing water, the by the V-shaped reflection plate. A sectional view taken along line IX-IX in FIG. 5 showing a plan view of the deflector 10, that is, a sectional shape in the nozzle direction perpendicular to the discharge direction A10 of the deflector 10, is formed in a substantially W shape.
[0015]
The V-shaped reflector 15 is wide in the discharge direction A10 of fire-extinguishing water, that is, from the base end 15b to which the support arm 11 is connected to the tip 15c, and the central angle θ is a water spray. The distribution tip alignment angle, that is, the angle at which the tip 18a of the sprinkling distribution 18 is aligned on substantially the same straight line and can be sprinkled so that a part thereof does not jump out. The alignment angle θ is appropriately selected in consideration of the ejection pressure from the nozzle 5 and the like. For example, 135 ° is adopted as the alignment angle θ.
[0016]
The inclination restraining plate 16 is narrower in the discharge direction A10 of the fire-extinguishing water, that is, from the base end 16b to which the support arm 11 is connected to the front end 16c, and with respect to the V-shaped reflector 15 The inclination angle γ is inclined. The inclination angle γ is appropriately selected in consideration of the spread in the width direction of the sprinkling distribution. For example, 130 ° is adopted as the inclination angle γ. In addition, although 14 is a dustproof cap, this cap 14 is automatically blown away by water discharge.
[0017]
Next, the operation of this embodiment will be described.
When fire extinguishing water W is pumped to the main body 6 at the time of a fire, the fire extinguishing water W is simultaneously discharged from the near throw nozzle 4 and the far throw nozzle 5 and falls onto the road surface 19.
Therefore, on the road surface 19 in the tunnel Tn, a water spray distribution area having a predetermined shape, for example, a water spray distribution 18 having a horizontal shape of 9 m and a height of 5 m is formed, and a three-dimensional protection range 20 having a height of about 4 and 5 m is formed. Fully covered with atomized fire-fighting water.
The dust caps 8 and 14 are blown off by fire-fighting water ejected from the nozzles 4 and 5.
[0018]
At this time, the fire-extinguishing water W discharged from the near throw nozzle 4 is sprinkled on the water spray head 3 side, and is sprayed over about 2/3 of the rectangular water spray distribution 18.
[0019]
The fire-extinguishing water W discharged from the long throw nozzle 5 collides with the center of the reflecting surface 15n of the V-shaped reflecting plate 15 of the deflector 10 and is dispersed. The fire-extinguishing water W ₁ dispersed in the discharge direction A10 out of the fire-extinguishing water W collided is scattered along the reflecting surface 15n and scattered toward the wall surface 1 facing the nozzle 5, and the rectangular water spray distribution. Water is sprayed in the remaining 18 regions, that is, about 1/3 of the tip side of the water spray distribution 18.
[0020]
At this time, since the central angle θ of the V-shaped reflector 15 is formed at the sprinkling distribution front end alignment angle, the front end 18a of the sprinkling distribution is aligned substantially on the same straight line, and a part thereof does not jump out. Therefore, wasteful use of fire-fighting water can be prevented.
[0021]
Among the fire-extinguishing water W that has collided, the fire-extinguishing water W ₂ dispersed in the direction orthogonal to the discharge direction A10 is restricted in its moving direction by the restraining surface 16n of the tilt restraining plate 16, so the orthogonal direction (lateral direction) ) Can be suppressed.
[0022]
At this time, since the width of the inclined holding plate 16 is narrower toward the proximal end 16b to the tip 16c, the strong base end side of water force compared to the tip 16c side, extinguishing water W ₂ to be subject to greater restriction Become. Therefore, unnecessary spread in the lateral direction on the base end 16c side of the fire-extinguishing water can be prevented.
[0023]
【The invention's effect】
The present invention has the following remarkable effects.
(1) Since the deflector has a substantially W-shaped cross section in the nozzle direction perpendicular to the discharge direction, a square water spray distribution can be obtained.
[0024]
(2) Since the center angle of the V-shaped reflector of the deflector is formed at the sprinkling distribution tip alignment angle, the tip of the sprinkling distribution is aligned on substantially the same straight line, and part of it does not jump out. Therefore, a square water spray distribution can be obtained with the minimum necessary water for fire extinguishing.
[0025]
(3) Since the width of the deflector inclination restraining plate is narrowed from the proximal end toward the distal end, the proximal end side having a strong water flow is restricted more than the distal end side. Therefore, it is possible to prevent the spread of excess fire-fighting water in the lateral direction.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of the present invention.
FIG. 2 is a front view of the same.
3 is a cross-sectional view taken along line III-III in FIG.
4 is a cross-sectional view taken along line IV-IV in FIG.
FIG. 5 is a plan view of the same.
FIG. 6 is a longitudinal sectional view showing the entire water spray head.
FIG. 7 is a cross-sectional view of the tunnel showing a state in which the water spray head is mounted in the tunnel, and is a view showing the water spray shape from the water spray head and the water spray distribution on the road surface.
[Explanation of symbols]
3 Water spray head 5 Long throw nozzle 6 Main body 15 V-shaped reflector 16 Inclination restraint plate 18 Rectangular water spray distribution

Claims (2)

A water spray head in which a near throw nozzle and a far throw nozzle having different radiation angles are provided on the main body, and a deflector having a proximal end fixed to the far throw nozzle by a support arm is disposed in front of the opening of the long throw nozzle . ;
The deflector includes a V-shaped reflecting plate having a V-shaped reflecting surface that collides and disperses water for extinguishing, and a side edge of the V-shaped reflecting plate, and is inclined toward the reflecting surface. And an inclination restraining plate having a restraining surface that regulates the lateral expansion of the fire-extinguishing water dispersed by the V-shaped reflector ,
A water spray head characterized in that the reflection surface of the V-shaped reflector is in the discharge direction of fire-extinguishing water , and the width becomes wider from the proximal end to which the support arm is connected toward the distal end . A water spray head in which a near throw nozzle and a far throw nozzle having different radiation angles are provided on the main body, and a deflector having a proximal end fixed to the far throw nozzle by a support arm is disposed in front of the opening of the long throw nozzle. ;
The deflector includes a V-shaped reflecting plate having a V-shaped reflecting surface that collides and disperses fire-extinguishing water, and
An inclination having a restraining surface that is continuous with the side edge of the V-shaped reflector and is inclined in the direction of the reflecting surface to restrict the spread of the water for fire extinguishing dispersed by the V-shaped reflecting plate in the lateral direction. With a holding plate ,
The clamping surfaces of the inclined holding plate is, where an emission direction of the extinguishing water, the water spray head is characterized in that the width toward the tip from the base end of the support arm is connected is narrowed.

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