JP3108407B2 - Short range water spray nozzle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a short-range water discharge nozzle for extinguishing a fire that has occurred near a nozzle installation position.

[0002]

2. Description of the Related Art Conventionally, as this kind of short distance water discharge nozzle, for example, a "nearest water discharge nozzle" of Japanese Patent Publication No. 5-54997 shown in FIG. 4 is known.

In the water discharge nozzle shown in FIG. 4, fire extinguishing water pressurized and supplied to the rectifying cylinder 11 is sent to the nozzle cylinder 13 while suppressing the rotation of the water flow by the rectifying plate 12. The fire extinguishing water sent to the nozzle tube 13 is discharged along the rod 5, is diffused by the bridge member 16 at the tip, and a part of the water strikes the deflector arms 18 and 17 and is reflected laterally. Further, since the rear bent portion 17a is formed at the tip of the deflector arm 17, the water flow diffused by the deflector arm 7 is diffused and discharged in the direction returning to the nozzle cylinder 13 by the rear bent portion 17a.

[0004] According to such a water discharge nozzle, for example, a substantially gourd-shaped effective watering range covering a water discharge distance of about 18 m from the nozzle installation location can be obtained, and a fire that occurred near the nozzle installation location can be effectively prevented. Fire can be extinguished.

[0005]

However, in such a conventional short-distance water discharge nozzle, a deflector is arranged in front of the nozzle tube to diffuse the water flow, thereby increasing the effective water discharge range in a short distance. However, there is a problem that the structure is complicated and the number of components of the nozzle increases.

Further, the conventional short-distance water discharge nozzle is used in combination with a long-distance discharge nozzle for extinguishing a fire in a large space, and the water discharge pressure supplied from the fire-extinguishing pump equipment is, for example, 8 kgf / cm ² or more. And the discharge rate is high.

However, in the case where the fire extinguishing target section is relatively narrow and the maximum water discharge distance is short, the facility can be used alone as a short-distance water discharge nozzle. Considering the prevention of damage, for example, 2.5
It is desired to reduce the water discharge flow rate at a relatively low pressure such as Kgf / cm ² . In the case of such a low-pressure, small-flow fire-extinguishing pump, the conventional water discharge nozzle cannot diffuse sufficiently by the deflector because the velocity of the water discharged from the nozzle is too low, and the necessary effective watering range There was a problem that could not be obtained.

The present invention has been made in view of such a conventional problem, and simplifies the nozzle structure, obtains a necessary effective watering range even at a low pressure and a small flow rate, and provides a nozzle installation position. An object of the present invention is to provide a short-range water discharge nozzle that can quickly extinguish a fire that has occurred nearby.

[0009]

In order to achieve this object, according to the present invention, a water supply pipe for pressurized fire extinguishing water is connected to a rear part as a short-distance water discharge nozzle for extinguishing a fire generated near a nozzle installation position. The tip provided with a water supply port is spherical and has a nozzle body in which a spherical hollow portion is formed at the tip of the inside, and forms a band-shaped paragraph portion on the tip spherical portion side of the hollow portion,
In this paragraph, a long-projection nozzle hole having a radiation angle upward with respect to the radiation direction, a middle-projection nozzle hole formed below the far-projection nozzle hole, and The nearest nozzle hole formed below the nozzle hole is arranged.

Here, the nearest nozzle hole includes a nozzle hole having a radiation direction rearward from the position immediately below the nozzle body. Further, the middle-casting nozzle hole has a smaller hole diameter than the far-casting nozzle hole, a larger number of holes, a wider horizontal space between the holes, and the closest-use nozzle hole has a larger diameter than the middle-casting nozzle hole. Are small, the number of holes is large, and the horizontal space between the holes is wide.

According to such a short-distance water discharge nozzle of the present invention, the nozzle structure has a simple structure in which a plurality of nozzle holes are formed in a nozzle body having a spherical tip.
It can be inexpensive.

Further, even if the pressurized fire extinguishing water supplied from the fire extinguishing pump equipment or the like has a low pressure of, for example, 2.5 kgf / cm ² , a plurality of nozzles extend radially to the spherical nozzle body regardless of the diffusion of the deflector. By opening holes, one by one
A so-called multi-nozzle structure in which one nozzle hole functions as a small water discharge nozzle is realized.
By arranging a plurality of nozzles separately, such as for the most recent use, it is possible to obtain a necessary effective water discharge range corresponding to the arrangement, number, and size of the nozzle holes.

Further, the band-shaped section formed on the tip spherical portion side of the hollow portion of the nozzle body has a function of causing a turbulent flow in the water discharged from the nozzle hole. Is spread to secure a rectangular effective watering range. If there is no band-shaped section, water is discharged straight from the nozzle hole, and a rectangular effective watering range cannot be secured. In other words, if water is discharged straight from each nozzle hole, uniform watering cannot be performed in the watering range. On the other hand, by forming the paragraph section, the water discharge from the nozzle hole can be diffused, and since the paragraph section has a band shape, a rectangular effective watering range can be secured.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a short-distance water discharge nozzle according to the present invention. FIG. 1 (A) is a plan view, FIG. 1 (B) is a side view, and FIG. 1 (C) is a bottom view. 1D is a front view, and FIG. 1E is a rear view. FIG. 2A is a view similar to FIG.
2B is a cross-sectional view taken along line CC of FIG. 1D, and FIG. 2C is a cross-sectional view taken along line BB of FIG. 1B.

In FIG. 1, a substantially spherical nozzle body 1a having a water supply port 3 is followed by a spherical tip portion 1b at the distal end side, and the inside thereof is hollow. The portions on both sides 1c of the tip spherical portion 1b are stepped down because there is no need to provide a nozzle hole. In the tip spherical portion 1b,
As is clear from the front view of FIG. 1D, the nozzle holes 4a to 4b for long casting, the nozzle holes 5a to 5d for middle casting, and the nozzle holes 6a to 6h for immediate casting from above (see FIG. 1C). Is formed.

The far-projection nozzle hole 4a located at the center is opened at a part of the far-projection nozzle cylinder 4 which is formed integrally with and protrudes from the distal end spherical portion 1b. Nozzle hole 4b is provided. As shown in FIGS. 2A and 2B, the remote projection nozzle holes 4a and 4b are provided in a radial direction at an angle θ1 upward with respect to the horizontal direction. By providing the three far-projection nozzle holes in this way, it is possible to reliably secure a water discharge range at a long distance. In particular, the pair of far-projecting nozzle holes 4b can reliably secure a water discharge range in the width direction at a distance.

The middle throwing nozzle holes 5a to 5d are arranged as a pair of two lateral throwing nozzles, and are arranged following the pair of far throwing nozzle holes 4b. Are smaller and the spacing between the lateral holes is wider.

Further, the most recent nozzle holes 6a to 6h have three rows in the first row and five rows in the subsequent rows, and as shown in FIG. From the rear to the position turned by the rearward radiation angle θ2.

As shown in the sectional views of FIGS. 2 (A) to 2 (C), the inside of the nozzle has a spherical hollow portion 2, and each nozzle hole has an axis extending in a predetermined direction passing through the center of the tip spherical portion 1b. Are formed along. Further, a strip-shaped paragraph portion 2a is formed on the tip end spherical portion side of the hollow portion 2, and the long projection nozzle holes 4a to 4b and the middle projection nozzle holes 5a to 5b 5d and the nearest nozzle holes 6a to 6h are arranged.

The strip-shaped section 2a formed on the tip spherical portion side of the hollow portion 2 of the nozzle body 1a has a function of causing turbulence in the water discharged from each nozzle hole. By diffusing the water discharged from the nozzle hole, a rectangular effective watering range is secured.

FIG. 3 shows an installation state and an effective watering range of the short distance water discharge nozzle of the present invention. First, the water discharge nozzle 7 of the present invention is provided in a mounting box 8 embedded and installed in a wall surface or the like, and a water supply main pipe 10 from a fire extinguishing pump facility is connected. A motor-operated valve 20 is provided in the middle of the water supply main pipe 10 and is opened and driven in the event of a fire to supply pressurized fire extinguishing water to the spherical water discharge nozzle 7 when the fire extinguishing pump equipment is started.

The pressurized fire extinguishing water supplied from the fire pumping equipment to the water discharge nozzle 7 of the present invention by the water supply main pipe 10 has a low water supply pressure of, for example, 2.5 kgf / cm ² . The mounting box 8 is provided with a fire source sensor 9 for detecting a fire source in a fire extinguishing target section and enabling automatic fire extinguishing by starting a fire extinguishing pump facility.

The facility where the water discharge nozzle 7 of the present invention is installed has a floor area of about several hundred m ² and a high ceiling,
Installed in small spaces such as atriums and galleria that are difficult to protect with conventional fire detectors and sprinkler fire fighting equipment. In such a small space,
As the effective watering range 30, a range in which the water discharge distance L is about 18 m and the width W is about 4 m is required. Such a distance L = 18
1 and FIG. 2 for an effective watering range 30 having a width m and a width W = 4 m.
The water for pressurized fire extinguishing from the fire extinguishing pump equipment is 2.5 kgf / cm
^Even with a low pressure of ² , the planned rectangular effective watering range 30
It has been experimentally confirmed that water can be effectively supplied to firefighting water.

The function of the water discharge nozzle 7 according to the present invention for obtaining the effective water spray range 30 will be described below with reference to the nozzle cross section of FIG. First, for 14 to 18 m, which is the long projection range of the effective watering range 30, the effective watering range is ensured by discharging water from the long projection nozzle holes 4a and 4b provided with a radiation angle of an angle θ1 upward with respect to the horizontal direction. . In this case, the upward angle θ1 of the long throw nozzle holes 4a, 4b with respect to the horizontal direction may be, for example, about θ1 = 15 °.

Subsequently, in the range of about 5 to 14 m of the effective watering range 30, effective watering is performed by discharging water from the middle casting nozzle holes 5a to 5d provided in two rows below the long casting nozzle holes 4a and 4b. Range is secured.

Further, in the range immediately adjacent to the effective watering range 30 from 0 to 5 m, the effective watering range is secured by the discharge from the nearest nozzle holes 6a to 6f. Further, in a range behind immediately below the nozzle, the nearest nozzle hole 6 for water sprinkling rearward is provided.
The effective watering range can be secured by watering from g to 6h.

The band-shaped staging portion 2a formed on the tip spherical portion side of the hollow portion 2 of the nozzle body 1a draws a turbulent flow into the water discharged from the nozzle holes 4a-4b, 5a-5d, 6a-6h. It has a function of causing water to diffuse from the nozzle holes 4a to 4b, 5a to 5d, and 6a to 6h by means of turbulent saw flow, thereby securing a rectangular effective watering range 30. Without this band-shaped paragraphing portion 2a, the nozzle holes 4a to 4a
Straight water is discharged from 4b, 5a to 5d, and 6a to 6h, and a rectangular effective watering range 30 cannot be secured. That is, the nozzle holes 4a-4b, 5a-5d, 6
When water is discharged straight from a to 6h, uniform watering cannot be performed in the watering range. Paragraph 2
a, the nozzle holes 4a-4b, 5a-5
d, 6a to 6h can diffuse the water discharge, and paragraph section 2
Since a is a band, a rectangular effective watering range 30 can be secured.

In the short-distance water discharge nozzles shown in FIGS. 1 and 2, the arrangement of nozzle holes for long throw, middle throw and near-end formed on the spherical tip portion 1b in the radial direction of the nozzle body 1a. Depending on the number and hole diameter, for example, the water discharge distance L = 18
m, a rectangular effective watering range 30 such as a water discharge width W = 4 m can be secured.

The nozzle holes provided in the nozzle are not limited to the above-described embodiments, and the radiation direction, the hole size, the number of holes, and the arrangement of the holes are determined according to the required shape of the effective watering range at a short distance. May be appropriately determined. In the above embodiment, the case where the short distance water discharge nozzle is installed alone is taken as an example. However, it can be used as a close water discharge nozzle combined with a long distance water discharge nozzle. In this case, since the water supply pressure to the long throw water discharge nozzle is high, pressurized water that has been reduced to a low pressure as necessary may be supplied to the short distance water discharge nozzle of the present invention.

In the embodiment shown in FIG. 3, the short-distance water discharge nozzle according to the present invention is fixedly installed on a wall surface. The water may be discharged by directing the water discharge direction of the spherical water discharge nozzle to the fire source detection position by the sensor.

[0031]

As described above, the short-distance water discharge nozzle of the present invention has a simple nozzle structure in which a plurality of nozzle holes are formed in the spherical portion at the tip of the nozzle body. The number of points is small, and the cost can be significantly reduced.

Further, a turbulent flow is generated in the water discharged from the nozzle hole by the band-shaped staging portion formed on the tip spherical portion side of the hollow portion of the nozzle body, and the water discharged from the nozzle hole is diffused. Effective watering range can be secured.

Further, along a front spherical surface which is a radiation direction of the nozzle body, a long projection nozzle hole having an upward radiation angle with respect to the radiation direction, and a middle projection formed under the long projection nozzle hole. The nozzle holes for use, and the nearest-use nozzle holes formed on the lower side of the middle casting nozzle holes are arranged in a row in order from the top, and water is supplied from the plurality of nozzle holes to be supplied from the fire extinguishing pump equipment. Water pressure for pressurized fire extinguishing water is, for example, 2.5 kg
Even at a low pressure of f / cm ² , a rectangular effective watering range required in front of the short-distance water discharge nozzle can be secured, and the fire can be quickly and reliably extinguished.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a short distance water discharge nozzle of the present invention.

FIG. 2 is a sectional view of each part of the short-distance water discharge nozzle of FIG. 1;

FIG. 3 is an explanatory diagram of an effective watering range by the short-distance water discharge nozzle of the present invention.

FIG. 4 is an explanatory view of a conventional short-range water discharge nozzle.

[Explanation of symbols]

 1a: Nozzle main body 1b: Tip spherical portion 2: Hollow portion 2a: Paragraphing portion 3: Water supply port 4a, 4b: Far throw nozzle hole 5a-5d: Middle throw nozzle hole 6a-6h: Nearest nozzle hole 7: Water discharge nozzle 8: Mounting box 9: Fire source sensor 10: Water supply pipe 20: Electric valve 30: Effective watering range

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Keiichi Kawaguchi 2-10-43, Kami-Osaki, Shinagawa-ku, Tokyo Inside Ho Chiki Co., Ltd. (72) Inventor Masaru Fujita 1-10-10, Noribori, Nishi-ku, Osaka-shi, Osaka Inside Tachibori Seisakusho Co., Ltd. (72) Inventor Toshiaki Matsumoto 1-10-10 Tachibori Tatebori, Nishi-ku, Osaka-shi, Osaka Inside Tachibori Co., Ltd. (56) References JP-A-63-57067 (JP, A) JP-A-1- 119268 (JP, A) JP-A 64-28667 (JP, U) JP-A 64-9665 (JP, U) JP 5-54997 (JP, B2) (58) Field surveyed (Int. Cl. ⁷ , DB name) A62C 27/00-39/00 B05B 1/12

Claims (1)

(57) [Claims] 1. A short-range water discharge nozzle for extinguishing a fire that has occurred near a nozzle installation position, wherein a water supply port for connecting a water supply pipe for pressurized fire-extinguishing water is provided at a rear end of the nozzle, and the tip is spherical and has an internal shape. It has a nozzle body with a spherical hollow portion formed at the tip, forms a band-shaped paragraph portion on the tip spherical portion side of the hollow portion, in a row from the top to the paragraph portion, in the radial direction A far-projection nozzle hole having an upward radiation angle, a middle-projection nozzle hole formed below the far-projection nozzle hole, and a nearest-use nozzle hole formed below the middle-projection nozzle hole. The near-injection nozzle hole includes a nozzle hole having a rearward radiation direction with respect to immediately below the nozzle body, and the middle-throw nozzle hole has a smaller hole diameter than the far-throw nozzle hole, and the number of holes. The distance between the holes in the horizontal direction is wide, and the nearest nozzle hole is A short-distance water discharge nozzle characterized by having a smaller hole diameter, a larger number of holes, and a wider horizontal space between the holes than the nozzle holes for use.