JP2001112879A - Water spraying head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water spraying head which sprays a necessary and enough amount and distribution of water within a fireproof region. SOLUTION: A closely spraying head provided downward on a head body and with a short-distance water-sprinkling range A and a plurality of faraway spraying heads provided higher than the closely spraying head with a long- distance water-sprinkling range B sprinkling at least partly in a long-distance region and containing a fan-shaped head are provided to reasonably cover a specified fireproof region by combining the short-distance water-sprinkling range A and the plurality of the long-distance water-sprinkling ranges B. It may be possible that a faraway spraying head for sprinkling to the corner part of the fireproof region is made to be a single opening nozzle with a rod-like water drainage or the faraway spraying head is fitted on the head body with a ball joint or a dust-proof cover covering by combining the closely spraying head and at least a part of the faraway spraying heads is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water spray head, and more particularly to a water spray head suitable for use in a watering system mainly in a space such as a tunnel.

[0002]

2. Description of the Related Art In a tunnel disaster prevention system, a fire prevention section is set by dividing a longitudinal direction of a tunnel at a predetermined distance of, for example, 50 m, and water is sprayed on a predetermined area in a specific fire prevention section when a fire occurs. FIG. 16 schematically shows a conventional watering system for watering the inside of a tunnel. The watering system includes a pressurized water supply source such as a pump 2 for supplying fire-extinguishing water in a water storage tank 1 and a pressurized water supply source. Tunnel 3 connected to the source and extending into tunnel 3
A main pipe 4 for supplying pressurized water therein, and a plurality of branch pipes 5 connected to the main pipe 4 in the tunnel 3 are provided.

The main pipe 4 is buried in an inspection path 6 provided on the side of the subgrade in the tunnel 3 and extends along the tunnel 3 as a whole, for example, into five sections (two sections S in FIG. 16).
1 and S2) (shown only 1 and S2).

A required number of branch pipes 5 are provided in each of the fire protection compartments, and rise from the main pipes 4 provided in the inspection path 6 along the side walls of the tunnel 3 to rise to the ceiling of the tunnel 3. A water spray head 7 for spraying pressurized water into a predetermined area in the tunnel 3 is connected to each of the distal end portions of the branch pipes 5. The water spraying range of the conventional water spray head 7 is about 5 m per 50 m for one section, and therefore, 10 water spray heads 7 are respectively arranged in parallel in the sections S1 and S2 in FIG. become.

At the root of the branch pipe 5, that is, at a low position,
A gate valve 8 and an automatic valve 9 provided downstream of the gate valve 8 are provided. The automatic valve 9 is opened when necessary such as at the start of a fire or a water discharge test, and the water spray head 7 is used for watering.
To stop the supply of pressurized water to the water spray head 7 by closing the pressurized water to the water spray head 7 during normal times such as when extinguishing or finishing the test.

As shown in FIGS. 17 and 18, a conventional water spray head 7 used in such a watering system has a head body 12 having a water supply port 11 for connection to a water supply pipe 10, and a head body 12 near the head body 12. A near-projection head 14 for near-casting is connected to the water-discharge port 13, and a far-projection head 16 for long-cast is connected to the far-water discharge port 15 of the head main body 12. In this specification, “near casting” refers to spraying water in a relatively short distance area including a portion directly below the water spray head, and “far casting” cannot be covered by the near casting head 14. Spraying water in a relatively remote area.

The near throw head 14 is a diffusion nozzle 17 whose axis is directed downward to sprinkle fire extinguishing water in a funnel shape.
The long throw head 16 has a nozzle 18 for discharging fire-extinguishing water in a rod shape.
And a deflector 19 that changes the scattering direction by colliding fire extinguishing water discharged in a rod shape. FIG.
9 includes such a near projection head 14 and a far projection head 16.
The distribution range A of the near fire head 14 with respect to the received fire prevention section S in the tunnel 3 (for example, about 5 m width in the length direction of the tunnel) is mainly the received fire prevention section S. While the center part is covered, the water spray range B by the long throw head 16 is the receiving fire protection section S
And the water spray areas A and B are actually sprayed together in a rounded rectangular shape. Note that both the near-casting head 14 and the far-casting head 16 are covered with a dust-proof cover which comes off from the head due to the pressure of the water when the water is discharged.

[0008]

In such a water spray head 7, a rectangular fire protection section S is covered by a water spray area A having a substantially circular planar shape and a water spray area B having a substantially elliptical planar shape. I have. Therefore, in order to completely cover the rectangular fire protection section S, the area outside the section C outside the area of the fire prevention section S is also covered over a considerably large area. The fire water sprayed is often wasted. In addition, if the area C outside the section is to be reduced, an area where watering is insufficient is generated in the received fire prevention section S.

Accordingly, an object of the present invention is to solve the above-mentioned problems of the conventional water spray head, and a water spray head capable of spraying a necessary and sufficient amount and distribution of water in a predetermined fire protection compartment. It is to get.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a water spray head according to the present invention is provided on a main body and provided downwardly on the main body, for spraying water to a short-distance region of a received fire protection compartment. A short throwing head having a short distance spraying range A, and a water spraying section provided at a position above the short throwing head in the main body and at least partially spraying water in a long-distance region farther than the short distance spraying range in the received fire protection section. A plurality of long throw heads each having a long water spray range B for covering water, wherein a predetermined fire protection section is covered by a combination of a short water spray area A and a plurality of long water spray areas B when extinguishing a fire. Head.

Further, at least a part of the long throw head may be a fan-shaped nozzle.

Further, the long throw heads can be alternately arranged on the main body.

Further, of the long throw heads, the long throw head that sprays water to the corners of the fire prevention section may be a single-port nozzle for discharging the rod-like water.

Further, of the long throw heads, the far throw head which sprinkles water at the corner of the fire protection section may be inclined at an upward angle.

Further, the near-projection head may be provided with a deflector in the downward nozzle, and a part of the deflector may have a bent portion slightly bent upward. Further, a water supply port for connecting a water supply pipe to the main body may be provided at an upper portion of the main body, so that the water discharge pressure of each head can be substantially equalized.

Further, the apparatus includes a main body, and a plurality of nozzles provided in the main body and having respective spraying ranges for spraying water to respective parts of the fire-prevention compartment. In the water spray head covered by the combination of the above, a universal joint for attaching each nozzle to the main body at an angle can be provided.

Furthermore, a main body, and a plurality of nozzles provided in the main body and having respective spraying ranges for spraying water to respective parts of the received fire-prevention section are provided. In a water spray head covered by a combination of the above, a dustproof cover that covers at least a part of each nozzle in combination may be provided.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 1 and 2 show a water spray head 20 according to an embodiment of the present invention.
FIG. 3 is a view showing watering ranges A and B for the received fire prevention section S to which water is sprayed by the water spray head 20. In addition, this fire prevention section is about 12.1 in the length direction of the tunnel.
The width is 5 m. In these figures, the water spray head 20 has a substantially hollow cylindrical head body 22 having a flanged water supply port 21 for connection to the water supply pipe 10 at the top. The near-projection water outlet 23 provided at the bottom of the head main body 22 has a near-projection head 2 having a short-distance spraying range A for spraying water into a short-distance region of the received fire protection section S.
4 are connected. Further, at a position above the near throw head 24, the far throw water outlet 25 of the head main body 22 is provided with a remote throwing water for at least partially spraying a long distance area of the received fire protection section S farther than the short distance spray area. Distance watering range B1
A plurality of long throw heads 26-29 having -B4 are connected. As described above, since the water supply port 21 for connecting the water supply pipe 10 to the head main body 22 is provided at the upper part of the head main body 22, and the respective heads 24 and 26-29 are arranged at a substantially concentrated position, Their discharge pressures are almost equal. Since the water supply port 21 is located at the upper part of the head main body 22, piping around the ceiling surface without a tunnel is easy to perform, and since the vertical flowing water reaches the near-cast head 24, the short-range watering range A is not distorted.

The near-projection head 24 is composed of a nozzle 30 whose axis is directed downward and discharges fire-extinguishing water, and a deflector 31 that collides the fire-extinguishing water discharged from the nozzle 30 to change the scattering direction to a substantially right angle. It is a thing. The deflector 31 may be a rectangular flat plate 32 having a radial slit as shown in FIG. 4, but a part of a rectangular flat plate having a radial slit as shown in FIG. 5 is bent upward at a slight angle. It is desirable to use the deflector 31 having the bent portion 33. In addition, the deflector 31
By using the rectangular flat plate 32, the sprinkling range A in FIG. 3 becomes slightly angular, and a wasteful area can be further reduced as compared with the case where water is discharged in a perfect circle.

When the flat deflector 32 shown in FIG. 4 is used, the spray pattern shown in FIG. 6 is obtained, and the original watering pattern 34 when only the long throw heads 26-29 are used.
The (dashed line) is drawn to the spray pattern 35 by the deflector 32 and becomes the watering pattern 36 shown by the solid line, and the watering of the long throw head does not reach far. This is because the deflector 32 draws the sprinkling water from the long throw heads 26-29 to the sprinkling moment from the beginning of spouting.

When the deflector 31 having the bent portion 33 shown in FIG. 5 is used, the pattern shown in FIG. 7 is obtained, and the fire extinguishing water is discharged at an angle upward by the deflector 32 as shown by the spray pattern 37. The original watering pattern 34 (broken line) in the case of only the long throw heads 26-29 becomes the watering pattern 38 with little influence of the suction, so that the water of the long throw head can reach sufficiently far. This is because the water spray of the remote projection heads 26-29 is not initially drawn by the water spray by the deflector 32, but is separated after that, so that the degree becomes small.

Each of the long throw heads 26-29 is a fan-shaped nozzle which has a flat opening in cross section and spreads fire-extinguishing water flat and sprays water. The long throw heads 28 and 29 are provided at a position higher than the far throw heads 26 and 27 in the circumferential direction, and the far throw heads 26-29 are arranged in a staggered or staggered manner. It can be said that it is.

As shown in FIG.
Water spray head 20 with four and long throw heads 26-29
According to the watering distribution according to the above, the spraying range A of the near fire head 24 with respect to the received fire protection section S covers the area of the received fire protection section S mainly in front of the water spray head 20, while the far fire projection area S The heads 26, 27, 28 and 29 provide watering ranges B1, B2, B3 and B4, respectively, which cover the remote areas of the fire protection compartment S. In this way, the received fire prevention section S is covered by the combination of the short-range watering range A and the plurality of long-range watering ranges B1-B4.

According to the water spray head 20 described above, the rectangular fire suppression zone S is covered by the water spray area A having a substantially circular planar shape and the water spray areas B1-B4 having a substantially elliptical planar shape. ing. Therefore, the rectangular fire protection compartment S
Is reasonably completely covered without having an unnecessarily large waste area, so there is less waste of fire water,
Water can be sprayed uniformly and sufficiently.

Embodiment 2 FIGS. 8 to 10 show another embodiment of the present invention.
Shows a water spray head 40 for completely covering with a single head. The water spray head 40 has a relatively large head body 41, a water supply port 42 is formed at the top of the head body 41, and a near projection head 44 having a deflector 43 at the bottom.
Are formed on the outer peripheral wall, and fan-shaped heads 45-55, which are a large number of long throw heads, are provided. This water spray head 4
According to 0, the entire area of the 25 m fire protection section S can be covered by one watering area and 11 watering areas (not shown). This sector head 45-55
Although not shown in detail, the distance and the amount of water can be adjusted by the shape of the outlet, for example, the front head 50 is
The distance is slightly shorter than the heads 49 and 51 on both sides. The heads 48 and 52 aiming at both corners of the received fire prevention section S discharge water at the longest distance, and are disposed slightly above the horizontally arranged heads 49, 50, 51 and the like.

Embodiment 3 FIG. 11 to 15 show a water spray head 60 according to still another embodiment. This water spray head 60 is also intended to completely cover the 25 m fire protection section with a single head. The water spray head 60 is
A head body 64 having a shape in which annular bulges 62 and 63 are partially formed in a substantially hollow cylindrical portion 61 is provided. The head body 64 has a water supply port 65 at the top, a near-projection head 67 having a deflector 66 having a slightly bent portion 91 at the bottom, and fan-shaped heads 68-80, which are a large number of long-range projection heads, on the outer peripheral wall. Is provided. There are six sector heads 68-73 provided on the lower bulge 63, and sector heads 74-7 provided on the upper bulge 62.
Although there are also six, the upper and lower fan-shaped heads are provided at staggered positions, that is, staggered from each other, so that a relatively large number of heads can be arranged in a narrow space.

Above the fan-shaped heads 68-78 arranged in two stages, far-injection heads 79 and 80 of single-port heads provided in the cylindrical portion 61 of the head main body 64 are provided. These long throw heads 79, 80, 79a and 80
Since a is sprayed in the form of a rod, it can be discharged particularly far.

Each of these long throw heads 68-80 is connected to the head main body 64 by a ball joint 81 as a universal joint as shown in FIG. The ball joint 81 has a ball 84 mounted on a seal seat 83 formed at the end of a discharge port 82 formed integrally with the head main body 64, and the ball 84 can be freely rotated by the cap 85 to the discharge port 82. It is held and fixed to the ball 84 so as to penetrate the head. If the head, for example, the head 68, is connected by such a ball joint 81, the direction of the watering head can be freely adjusted, so that the watering range can be finely adjusted at the time of manufacture or on site, while the watering head can be finely adjusted. The angle does not change with the pressure of the water discharge. This ball joint 81 can of course be applied to other embodiments, and is useful when used in combination with other heads.

As shown in FIG. 15, the range of water spraying by the water spray head 60 is as follows: the entire area of the fire prevention section S having a length of 25 m is one spraying area A by the near-casting head 67 and 13 far-casting heads 68-. 13 watering ranges B1-B by 80
13 can be covered.

The near throw head 67 and each far throw head 68-
The dust spray cover 80 may be provided with a dustproof cover for covering the water spray head so that the function of the water spray head is not impaired by foreign substances such as exhaust gas, engine oil, tire dust, sand, and dust when not in use. At this time, since there are many watering heads, rather than attaching a cover to each individual head,
It is advisable to create a group by combining several heads and attach a dustproof cover to each group. If a dustproof cover is attached to each individual head, if the order of removal from the cover occurs, there is also a relief of pressure due to running water, and the last one etc. may remain without receiving sufficient pressure,
There is a cover that does not come off due to the water discharge pressure and distortion of the water distribution will occur, but if one dustproof cover is attached to multiple heads, sufficient water pressure can be applied to the cover and it will come off at once, The distribution is not distorted.

[0031]

As described above, the water spray head according to the present invention is provided with a main body and a short-distance spraying area A provided downwardly on the main body for spraying water into a short-distance area of the fire protection compartment.
And a long-range water sprinkler provided on the main body at a position above the near-cast head and at least partially spraying water in a far-distance area farther than the short-range water spray area in the received fire protection section. The water spray head includes a plurality of long throw heads having a range B, and covers a predetermined fire prevention section with a combination of a short distance spray area A and a plurality of long distance spray areas B when extinguishing a fire. Thus, a water spray head is provided which can provide the necessary and sufficient amount and distribution of water in a given fire compartment.

Since at least a part of the long throw head is a fan-shaped nozzle, the water distribution is uniform.

Further, since the long throw heads are alternately arranged on the main body, a large number of heads can be provided on a relatively small head main body.

Further, of the long throw heads, the long throw head that sprays water to the corners of the fire prevention compartment is a single-port nozzle for discharging water in the form of a rod, so that a sufficient amount of fire extinguishing water can be supplied accurately over a long spray range. can do.

Further, of the long throw heads, the long throw head which sprays water to the corners of the fire protection compartment is inclined at an upward angle, so that a sufficient amount of fire extinguishing water can be accurately supplied to a far water spray range. be able to.

The near-projection head is provided with a deflector in the downward nozzle, and a part of the deflector is slightly bent upward, so that the water projection pattern of the far-projection head can be slightly attracted. . In addition, a water supply port for connecting a water supply pipe to the main body is provided at the top of the main body,
Since the water discharge pressure of each head is substantially equalized, it is easy to adjust the watering pattern.

Further, since a ball joint is provided as a universal joint for attaching the remote casting head to the main body at a variable angle, the direction of the watering head can be freely changed, and the watering range can be finely adjusted on site. In addition, the angle of the watering head does not change with the pressure of the water discharge.

Further, a dust-proof cover for covering at least a part of each of the near-casting head and the far-casting head can be provided, so that when not in use, foreign matter such as exhaust gas, engine oil, tire dust, sand, dust, etc. The watering head can be covered so that the function of the watering head is not impaired.

[Brief description of the drawings]

FIG. 1 is a side view showing a water spray head according to an embodiment of the present invention.

FIG. 2 is a front view showing a water spray head of the present invention.

FIG. 3 is a distribution diagram showing water distribution by the water spray head of FIG. 1;

FIG. 4 is a perspective view of a deflector that can be used in the water spray head of FIG. 1;

FIG. 5 is a perspective view of a deflector of the water spray head of FIG. 1;

FIG. 6 is a pattern diagram showing a watering pattern by the deflector of FIG. 4;

FIG. 7 is a pattern diagram showing a watering pattern by the deflector of FIG. 5;

FIG. 8 is a plan view showing a water spray head according to another embodiment of the present invention.

FIG. 9 is a front view showing the water spray head of FIG. 8;

FIG. 10 is a side view showing the water spray head of FIG. 8;

FIG. 11 is a side view showing a water spray head according to still another embodiment of the present invention.

FIG. 12 is a sectional view of the water spray head taken along line AA in FIG. 11;

FIG. 13 is a plan view of the water spray head of FIG. 11;

FIG. 14 is a sectional view showing a ball joint of the water spray head of FIG. 11;

FIG. 15 is a pattern diagram showing a watering pattern by the water spray head of FIG. 11;

FIG. 16 is a schematic diagram showing a watering system to which the water spray head of the present invention can be applied.

FIG. 17 is a side sectional view of a conventional water spray head.

18 is a front view of the water spray head of FIG.

FIG. 19 is a pattern diagram showing a watering pattern by the water spray head of FIG. 17;

[Explanation of symbols]

20 body, S fire protection compartment, A short-range watering range,
23 near-casting head, B long-range watering range, 26-29 far-casting head, 26-29 fan-shaped nozzle, 79 single-mouth nozzle,
10 water supply pipe, 21 water supply port, 81 ball joint.

Claims (9)

[Claims] 1. A main body, a near-projection head provided downward on the main body, and having a short-distance spraying range A for sprinkling water in a short-distance region of the received fire protection compartment, A plurality of long throw heads having a long water spray range B for at least partially watering a long distance area farther than the short water spray area of the received fire protection section, provided on the main body at a position, A water spray head that covers a predetermined fire prevention section with a combination of a short-range watering range A and a plurality of long-range watering ranges B when extinguishing a fire. 2. The water spray head according to claim 1, wherein at least a part of the long throw head is a sector nozzle. 3. The water spray head according to claim 1, wherein the long throw heads are alternately arranged on the main body. 4. The water spray head according to claim 1, wherein, among the long throw heads, the far throw head that sprays water to a corner portion of the fire prevention section is a single-port nozzle for discharging a rod-like water. 5. The water spray head according to claim 1, wherein, among the long throw heads, the far throw head that sprays water to a corner of the fire prevention section is inclined at an upward angle. 6. The water spray head according to claim 1, wherein the near throw head has a deflector for a downward nozzle, and a part of the deflector has a bent portion slightly bent upward. 7. The water spray head according to claim 1, wherein a water supply port for connecting a water supply pipe to the main body is provided at an upper portion of the main body, and a water discharge pressure of each head is made substantially equal. 8. A combination of a main body, a plurality of nozzles provided in the main body, and having a plurality of nozzles each having a water spray area for water spraying to each part of the received fire protection area, wherein a predetermined fire protection area is provided when a fire is extinguished. A water spray head comprising: a universal joint for mounting each of the nozzles to the main body at a variable angle. 9. A combination of a plurality of nozzles provided in the main body and having a plurality of nozzles having respective spraying ranges for spraying water to respective parts of the received fire protection compartment, wherein a predetermined fire protection compartment is provided when a fire is extinguished. A water spray head comprising a dustproof cover for covering at least a part of each nozzle in combination.