JP2002095767A - Fire extinguishing head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable water to be uniformly sprinkled on a rectangular water sprinkling area. SOLUTION: A fire extinguishing head is mounted on the side wall of a large space in such a manner that the central axis of the head is made horizontal. The head is provided with a short-range nozzle installed slantingly downward relative to the central axis in order to sprinkle water on a discharge area near the head, and the above nozzle has an outer nozzle with a guide ring on an upper end surface and a deflector installed within the guide ring.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire extinguishing head used in large exhibition halls, atriums, gymnasiums and the like. The present invention relates to a fire extinguishing head capable of spraying water evenly over a fire extinguishing area.

Conventionally, a fire extinguishing head in which a plurality of nozzles having different firing distances are vertically arranged has been used in order to spray water evenly over a wide rectangular fire extinguishing area. The nozzles of the fire extinguishing head are provided, in order from the top, with a long throw nozzle, a middle throw nozzle having a shorter throw distance than the far throw nozzle, and a near throw nozzle having a shorter throw distance than the middle throw nozzle. Have been.

[0003]

The conventional fire extinguishing head has the following problems. (1) The water discharge stream jetted from the near-casting nozzle draws in air and draws the water jet stream jetted from the casting-while-out nozzle.
Further, the water discharge stream jetted from the middle casting nozzle also draws in air, and the water jet stream jetted from the long casting nozzle. Because the range of each nozzle is shorter than the design,
Water cannot be sprayed evenly over a 20 m-class wide rectangular watering area.

(2) Since the water spray area is determined to be a long distance nozzle for a long throw nozzle and a middle spot for a middle throw nozzle, the size of the particle diameter differs depending on the location.

(3) Since the watering point of each nozzle is fixed, it is difficult to spray water uniformly with a clean rectangular water discharge or the like.

(4) When water is sprayed rectangularly from one location, a plurality of jet nozzles are used, and an appropriate angle is arranged between the nozzles in accordance with water spray formation. However, in this method, when the amount of water discharged from each nozzle is the same, a predetermined amount of water cannot be obtained at the left and right angles in front.
Therefore, it is not possible to evenly spray the rectangular watering area.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to make it possible to evenly spray a rectangular watering area.
The inventor has noticed that the water flow from the nozzle is more susceptible to air resistance as it goes outward, so that the problem can be solved by increasing the amount of water discharged from the outer nozzle.

[0008]

According to the present invention, a small-diameter water outlet, a medium-diameter water outlet larger in diameter than the small-diameter water outlet, and a large-diameter water outlet larger than the medium-diameter water outlet are arranged in parallel. A fire extinguishing head having a nozzle disposed therein; a large-diameter water outlet disposed on both sides of the medium-diameter water outlet, and a small-diameter water outlet provided between the medium-diameter water outlet and the large-diameter water outlet. The purpose is to achieve the above object.

[0009]

When the fire extinguishing water is pumped to the fire extinguishing head, a water jet is jetted from each water outlet. At this time, since a large amount of water discharge is discharged from the outer large-diameter water outlet, the water discharge is not affected by air resistance, and the water discharge interferes with the water discharge from the other outlets, and the flow of those water discharges is reduced. Increase range. or,
The middle flow discharged from the middle middle outlet prevents uneven watering. Further, the small stream discharged from the small-diameter outlet replenishes watering between the center and the end.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The fire extinguishing head 1 is provided with a middle throw nozzle 100, a far throw nozzle 200, and a near throw nozzle 300 in this order from top to bottom.

The center axis 100c of the middle casting nozzle 100 and the center axis 200c of the far casting nozzle 200 are parallel to each other,
The long casting nozzle 200c is provided on the central axis 1 of the fire extinguishing head 1.
It is inclined at an angle θ1 with respect to c. The angle θ1 is appropriately selected in consideration of the sprinkling area. For example, the angle θ1 = 26
゜ is selected.

The axis 300 C of the near-injection nozzle 300 is inclined at an angle θ 2 with respect to the central axis 1 c of the fire extinguishing head 1. The angle θ2 is appropriately selected in consideration of the sprinkling area. For example, the angle θ2 = 43 ° is selected.

The middle throw nozzle 100 is a long throw nozzle 2
The short throw nozzle 300 has a shorter range than 00 and
The fan-shaped nozzle has a longer range than the fan-shaped nozzle. The nozzle 10
In the case of using only one 0, the range L is about 8.
5 to about 16 m, the sprinkling width W is about 2 to 3 m, and FIG.
A sprinkling basin S1 shown in FIG.

A pair of middle throw nozzles 100 are provided on the same horizontal line F1 with the central axis 1c of the fire extinguishing head 1 interposed therebetween. The intersection angle θ3 between the central axes 100C of the two nozzles 100 is appropriately selected. For example, the intersection angle θ3 is 14 °. The diameter of the nozzle 100 increases toward an outlet 101, and the outlet 101 is formed in a rectangular shape (see FIGS. 5 to 7).

The long throw nozzle 200 is a middle throw nozzle 1
00 is a jet nozzle having a longer range than the near-projection nozzle 300, and therefore has the longest range among the nozzles. When the nozzle 200 is used alone, the range L is about 7 to about 22 m, and the watering width W is about 2 to about 5 m, thereby forming a watering area S2 shown in FIG. 21B.

The long casting nozzle 200 is located on the same horizontal line F
2 is provided with a plurality of water discharge holes 201 arranged at intervals. This water discharge hole 201 is a medium-diameter hole 202
Large-diameter holes 203 provided on both sides of the medium-diameter hole 202
And a small-diameter hole 204 provided between the medium-diameter hole 202 and the large-diameter hole 203. The medium diameter hole 20
The second central axis 200c intersects with the central axis 1c of the fire extinguishing head (see FIGS. 8 to 10).

The diameters of the holes 202 to 204 are different from each other for the following reason. (1) The water flow from the nozzle is more susceptible to air resistance as it goes outside, so the outside nozzle must be set to a large flow rate so as not to be affected.

(2) If the water flow in the center is set to a large flow rate, the water is sprinkled in the center. To prevent this uneven watering,
The middle nozzle must discharge a medium flow. (3) The nozzle between the center nozzle and the nozzles on both sides must be followed by watering on the center and both sides for uniform spraying.

In consideration of the above circumstances, the size of the diameter of each of the holes 202 to 204 is, for example, as follows:
The medium-diameter hole 202 is formed so as to have a ratio of 7: 4: 5, but it is needless to say that this ratio can be appropriately changed as needed.

The long casting nozzle 200 has a function of compensating for the lack of a sprinkling area of the water discharge flow spouted from the middle casting nozzle 100.

The near-projection nozzle 300 has a shorter range than the middle-projection nozzle 100 and the far-projection nozzle 200, and therefore has the shortest range among the nozzles. When the short throw nozzle 300 is used alone, the range distance L is about 1 m rearward to about 6 m forward, and the watering width W is about 4 to 5 m, and forms a watering area S3 shown in FIG. 21C.

The near-injection nozzle 300 includes an inner nozzle 30
1 and an outer nozzle 310 fitted to the inner nozzle 301
And a deflector 320 interposed between the inner nozzle 301 and the outer nozzle 310.

An orifice housing 302 is provided at the rear end of the inner nozzle 301, and a plurality of water supply holes 3 communicating with the discharge port 311 of the outer nozzle 310 is provided in the body 309.
03 is provided (see FIGS. 13 and 14).

The tip of the inner nozzle 301 has a throttle 3
05 is provided. The angle θ5 of the aperture unit 305 is appropriately determined as needed. For example, the angle θ5 = 9
0 °. Reference numeral 308 denotes an engaging step portion such as a tool.

The water outlet 306 of the inner nozzle 301 is formed in a radial shape, and the radiation angle θ6 is appropriately determined as necessary. For example, the radiation angle θ6 = 120
゜. A spiral storage portion 307 is formed between the throttle portion 305 and the water supply hole 303.

On the upper end surface of the outer nozzle 310, a guide ring 312 and a resistance ring 313 are formed concentrically. An annular flow path 315 is provided between the rings 312 and 313.
Is provided. The inner surface of the guide ring 312 is inclined outward. The inclination angle θ8 is appropriately determined as needed, and is, for example, an inclination angle θ8 = 45 ° (see FIGS. 15 and 16).

A notch 314 is provided in the front half of the guide ring 312, and water spray from the notch 314 constitutes a lower water discharge zone E3. The water discharge angle E3 of this water discharge area
Is appropriately determined as necessary. For example, the angle E3 =
125 °.

The resistance ring 313 is composed of a plurality of fan-shaped protrusions 316 arranged at intervals in the circumferential direction. The portion corresponding to the lower water discharge area E3 lacks the protrusion, and the portion corresponding to the side water discharge area E2 is provided with a plurality of side protrusions 317 with a gap L6 therebetween. Water area E
A central protruding piece 318 is provided at the center of the portion corresponding to 1.

The center projection 318 is formed on the side projection 31.
7, and the distance L7 between the central protrusion 318 and the side protrusion 317 is formed wider than the distance L6. The water discharge area angles E2 and E1 of the side water discharge area E2 and the upper water discharge area E1 are appropriately selected as needed, and for example, the water discharge area angle E2 = 45 ° and the water discharge area angle E1 = 90 °. 319 is a passage into which the inner nozzle 301 is fitted.

A fitting opening 321 for the inner nozzle 301 is formed at the center of the deflector 320, and cutouts 322 and 323 are formed at the periphery thereof. The notch 322 is a lower notch and forms a U-shaped groove having a width L10 substantially equal to the width L11 of the dispersion piece 325. The notches 322 are formed at equal intervals over the entire range corresponding to the lower water discharge area E3. The shape and number of the cutout portions 322 are appropriately selected as needed (see FIG. 17).

The cutout portion 323 is an upper cutout portion and is formed at a portion corresponding to the upper water discharge area E1. The notch angle L13 of the upper notch 323 is determined as needed, and is, for example, notch angle L13 = 60 °.

A notch is not provided in a portion 326 of the peripheral portion of the deflector 320 corresponding to the side water discharge area E2.

The inner nozzle 301 has a spiral 330
And an orifice 340 are provided. Spiral 3
30 is provided with a spirally formed groove 331 on its side wall, and stirs the fire extinguishing water to form a swirling flow. In addition,
332 is a water passage hole (see FIG. 18).

The orifice 340 is formed in the ring 341, and the inner surface 343 on the outlet 342 side is formed in a truncated cone shape with a cone angle α. The cone angle α is appropriately selected as needed. For example, the cone angle α is 90 °. This orifice 340 reduces the pressure of the effluent stream and increases the effluent particle size. 345 is an entrance (FIG. 19,
See FIG. 20).

Next, the operation of this embodiment will be described. FIG.
The fire extinguishing head 1 is attached to the side wall 500 of a large space such as an international exhibition hall as shown in FIG. At this time, the central axis 1c of the fire extinguishing head 1 is horizontal, and the middle throw nozzle 100 and the far throw nozzle 200 are directed upward, for example, the tilt angle θ1 = 26 ° upward with respect to the central axis 1c. Further, the near-casting nozzle 300 faces downward, for example, the central shaft 1c.
The inclination angle θ2 = 43 ° downward.

When the main valve of the fire extinguishing equipment (not shown) is opened and the fire extinguishing water 600 at a predetermined pressure, for example, 3.5 kgf / cm 2, is sent to the fire extinguishing head 1, as shown in FIG. It is emitted from the nozzles 100, 200, 300.

Outflow 610 from middle casting nozzle 100
While spreading in a fan shape, it falls in a parabolic shape, but collides with a rod-shaped water discharge flow 620 from the long throw nozzle 200 at a point P. Therefore, the energy of the rod-shaped water discharge stream 620 is deprived by the water discharge stream 610, and the water discharge stream 610 extends the range distance L while riding on the water discharge stream 620, as well as the water discharge area S 5 of the middle casting nozzle 100. Since the sprinkling flow 620 is sprinkled also on the center line SC, the sprinkling area S5 of the middle casting nozzle 610 has the shape shown in FIG.

The rod-shaped water discharge stream 620 deprived of energy by the water discharge stream 610 has a shorter range L as compared with the case where it is used alone, and becomes a sprinkling area S6 shown in FIG. 23. It extends over 20m.

As described above, the outflow 610 and the outflow 6
Although the range L of the rod-shaped water discharge stream 620 becomes short due to the collision with the water stream 20, the water discharge streams 610 and 620 serve as deflectors on the other hand, so that water can be uniformly and widely sprayed. it can.

The long casting nozzle 200 has a large diameter hole 203, a small diameter hole 204, and a medium diameter hole 202 which are different in diameter from each other and are spaced apart from each other in the horizontal direction. The effluent discharged from the hole does not converge in the middle.

Since the large-diameter holes 203 having the largest diameter are arranged on both sides, the water discharged from the large-diameter hole 203 having the longest distance L can be discharged from the other holes 202 and 204 having a short range. Interfering with the water streams, their effluent streams have a greater range L than would be emitted alone. As a result, spraying with a certain spread can be performed more reliably.

A medium-diameter hole 202 is provided at the center, and large-diameter holes 203 are provided on both sides thereof.
Since the water flow from the medium-diameter hole 202 is provided, the water flow from the other holes 203 and 204 is less likely to be interfered by the water discharge flow from the other holes 203 and 204. Further, if the watering region is formed only by the water discharge flow from the large diameter hole 203 and the medium diameter hole 202, the water distribution becomes uneven, but this disadvantage can be solved by the water discharge flow from the small diameter hole 204.

Each water discharge area E1, E2,
The water discharge stream 630 discharged from E3 falls while drawing a parabola, and is sprayed on the water discharge area S7 near the fire extinguishing head 1. An orifice 340 is provided in the near-casting nozzle 300, and the fire-extinguishing water 600 supplied to the fire-extinguishing head 1 and diverted to the near-casting nozzle 300 is supplied to the orifice 340 at a predetermined pressure, for example. 2.5k
g / cm <2>, the flow rate becomes slow.

Therefore, the water discharge flow 630 from the near-casting nozzle 300 is transmitted to the far-casting nozzle 200 and the middle-casting nozzle 100.
Does not affect the effluents 610 and 620 released from the water, and the particle size of the sprinkled water is increased, so that the fire extinguishing effect can be improved.

The fire extinguishing water 6 passing through the orifice 340
00 is swirled by the spiral 330,
After being squeezed by the squeezing section 305, the spilled water 630 flows from the inner nozzle 301 and is discharged in a conical shape.

The fire extinguishing water 6 passing through the orifice 340
A part of 00 passes through the water supply hole 303 and the passage 350, and is restricted by the deflector 320, the projections 316, 317, and 318 and the guide ring 312, and the notch 314 and the gap L
6, the effluent stream 630 released from L7 becomes the outer nozzle 3
From 10, water is sprayed all over the upper water discharge area E1, the side water discharge area E2, and the lower water discharge area E3.

The upper sprinkling area E1 is mainly responsible for sprinkling water in the central portion 300C of the water discharge area S7, and the side sprinkling area E2.
Mainly receives water spray on the side 300B of the water discharge area S7, and further, the lower water spray area E3 mainly handles water spray on the rear end 300A side of the water discharge area S7.

In this manner, each of the nozzles 100, 200,
The water discharge streams 610, 620, 630 from 300 form a large rectangular watering area S as a whole, with a length L exceeding 20m and a width W exceeding 5m. Therefore, the fire extinguishing head 1 can efficiently extinguish a fire in a building having a large space such as an atrium.

The embodiment of the present invention is not limited to the above. For example, as shown in FIG. 24 and FIG. The near-projection nozzle 300 can be provided below the nozzle 200 for use. In FIG. 25, θ3 is the intersection angle of the center axis 200c of the middle throw nozzle 200, for example, the intersection angle θ3 = 14 °. 24 and 25, the nozzles 100, 200, and 300 have the same configuration as described above, and the same components as those in FIGS. 1 to 23 are denoted by the same reference numerals.

[0050]

The present invention has been configured as described above.
It has the following remarkable effects. (1) Since the diameter of the outlet on both sides is larger than that of the other outlets, a larger amount of water is sprayed from the outer outlet than on the inner side. Therefore, the water discharge from the outer water outlet is not affected by air resistance,
Interfering with the outlet stream from the inner outlet, increasing the range of those outlet streams. Therefore, it can be surely spread with a certain extent.

(2) A large-diameter water outlet is provided on both sides of the medium-diameter water outlet, and a small-diameter water outlet is provided between the medium-diameter water outlet and the large-diameter water outlet. The effluent stream is not significantly affected by air resistance and interferes with the effluent streams from other nozzles to extend its range. Therefore, the overall range can be set to 20 m or more. In addition, the water discharged from the small-diameter water outlet is sprayed even in a range where the water discharged from the large-diameter water outlet and the medium-diameter water outlet cannot sufficiently sprinkle water.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention and is a view showing an attached state.

FIG. 2 is a front view showing the fire extinguishing head before mounting.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a plan view of FIG. 2;

FIG. 5 is a front view of a middle throw nozzle.

FIG. 6 is a sectional view taken along line VI-VI of FIG. 5;

FIG. 7 is a sectional view taken along the line VII-VII of FIG. 5;

FIG. 8 is a side view of a long throw nozzle.

FIG. 9 is a plan view of a long throw nozzle.

FIG. 10 is a front view of a long throw nozzle.

FIG. 11 is a front view of a near projection nozzle.

FIG. 12 is a sectional view taken along line XII-XII of FIG. 11;

FIG. 13 is a front view of an inner nozzle of the near projection nozzle.

14 is a sectional view taken along the line IVX-IVX in FIG.

FIG. 15 is a front view of an outer nozzle of the near projection nozzle.

16 is a sectional view taken along line XVI-XVI in FIG.

FIG. 17 is a plan view of a deflector of a proximity nozzle.

FIG. 18 is a plan view of a spiral of a near projection nozzle.

FIG. 19 is a plan view of an orifice of the near projection nozzle.

20 is a sectional view taken along line XX-XX in FIG.

FIG. 21 is a view showing a sprinkling area when each nozzle is used alone, where A shows that of a middle throw nozzle, B shows that of a far throw nozzle, and C shows that of a near throw nozzle.

FIG. 22 is a diagram showing a state of a water discharge flow of each nozzle.

FIG. 23 is a diagram showing a rectangular watering area formed by a water discharge flow of each nozzle.

FIG. 24 is a front view showing another embodiment.

FIG. 25 is a partial sectional plan view of FIG. 24;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fire extinguishing head 100 Middle throw nozzle 200 Far throw nozzle 300 Near throw nozzle

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[Procedure amendment]

[Submission date] August 28, 2001 (2001.8.2
8)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008]

SUMMARY OF THE INVENTION The present invention relates to a fire extinguishing head mounted on a side wall of a large space so that the central axis of the fire extinguishing head is horizontal, wherein the fire extinguishing head is inclined downward with respect to the central axis. A fire-extinguishing head characterized by providing a near-injection nozzle for sprinkling water in a water discharge area near the fire-extinguishing head, or a fire extinguisher attached to a side wall of a large space such that the center axis of the head is horizontal. A head for middle projection provided to be inclined upward with respect to the central axis, and a head provided to be inclined downward with respect to the central axis, the range of which is shorter than that of the middle projection nozzle. A head for fire extinguishing, comprising: a near-casting nozzle; and a spouting nozzle characterized by spraying water to a water discharge area near the fire-extinguishing head by the near-casting nozzle. Attached to the side wall Three heads, each having a different range, a first nozzle, a second nozzle, and a third nozzle are arranged in order from the top to the bottom, and the first nozzle is disposed on the central axis. The second nozzle is provided to be inclined upward with respect to the second nozzle, the second nozzle is configured with a plurality of water discharge holes arranged at intervals in the horizontal direction, and the third nozzle has a water discharge port and a deflector, A fire-extinguishing head characterized by spraying water in a water discharge area near the fire-extinguishing head, or a fire-extinguishing head attached to a side wall of a large space so that the central axis of the head is horizontal, each having a range. Are different from each other, three nozzles including a first nozzle, a second nozzle, and a third nozzle are sequentially arranged from top to bottom, and the first nozzle is provided to be inclined upward with respect to the central axis. The said The nozzle is composed of a plurality of water discharge holes larger than the first nozzle, and the third nozzle is a nozzle that sprays water to a water discharge area near a fire extinguishing head, and discharges water at a rear end side of the water discharge area. A fire extinguishing head, characterized by having a lower water discharge area to cover
Thus, the above object is achieved.

Claims (9)

[Claims] 1. A fire extinguishing head attached to a side wall of a large space so that a central axis of the fire extinguishing head is horizontal, the fire extinguishing head being provided inclined downward with respect to the central axis. A near-casting nozzle that sprays water to a nearby water discharge area, wherein the near-casting nozzle includes an outer nozzle having a guide ring on an upper end surface, and a deflector provided in the guide ring. head. 2. The deflector according to claim 1, wherein a lower notch is formed in a lower peripheral portion of the deflector, and the guide ring is provided with a notch corresponding to the lower notch. Fire extinguishing head. 3. The fire extinguishing head according to claim 2, wherein the cut-out portion forms a lower water discharge area, and the lower water discharge area is responsible for water sprinkling at a rear end side of the water discharge area. 4. A fire-extinguishing head attached to a side wall of a large space so that a central axis of the head is horizontal, a middle-throwing nozzle provided to be inclined upward with respect to the central axis, A near-projection nozzle that is provided to be inclined downward with respect to the central axis and has a shorter range than the middle-projection nozzle; and the near-projection nozzle sprays water to a water discharge area near the fire extinguishing head. A fire extinguishing head characterized by the following. 5. The fire extinguisher according to claim 1, wherein a pair of said middle throw nozzles are provided on the same horizontal line, and said pair of nozzles are provided so as to open with respect to said central axis. For head. 6. A fire-extinguishing head mounted on a side wall of a large space so that a central axis of the head is horizontal, comprising a first nozzle, a second nozzle, and a third nozzle, each having a different range. Two nozzles are arranged in order from top to bottom, the first nozzle is provided to be inclined upward with respect to the central axis, and the second nozzle is arranged at intervals in the horizontal direction The fire extinguishing head, comprising: a plurality of water discharging holes, wherein the third nozzle has a water discharging port and a deflector, and sprays water to a water discharging area near the fire extinguishing head. 7. A fire-extinguishing head mounted on a side wall of a large space so that a central axis of the head is horizontal, comprising a first nozzle, a second nozzle, and a third nozzle, each having a different range. Three nozzles are arranged in order from top to bottom, the first nozzle is provided to be inclined upward with respect to the central axis, and the second nozzle is provided with a plurality of water discharges more than the first nozzle. The third nozzle is a nozzle that sprays water to a water discharge area near a fire extinguishing head, and has a lower water discharge area that is responsible for water spraying at a rear end side of the water discharge area. head. 8. The water discharge stream from the first nozzle, the second nozzle, and the third nozzle, respectively, forms a large rectangular watering area as a whole. Fire extinguishing head. 9. The watering area has a width of 3 to 5 m and a length of 16
The fire extinguishing head according to claim 7 or 8, wherein the fire extinguishing head has a rectangular area of about 22 m. [Claims]