JP2001309991A - Fire-fighting nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire-fighting nozzle the sprinkling range (pattern) of which is a rectangle, attached on a belt conveyer to prevent sprinkling of wasteful water. SOLUTION: On the fire-fighting nozzle N provided with a nozzle body 10 which has a draining hole 12 and a cylindrical frame with bottom 20 connected to the nozzle body 10, a pair of opening holes 24 is furnished on the frame toward its diameter direction and these opening holes 24 are formed bigger than the draining hole 12. From the bottom wall 22 of the frame to a surrounding wall 23, a plurality of slit holes 25 are furnished, and a cone 27 is formed above the center of the frame bottom wall. This fire-fighting nozzle is set on the top of the belt conveyer for transportation of combustibles.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire extinguishing nozzle, and more particularly to a fire extinguishing nozzle capable of spraying water in a rectangular shape and protecting a belt conveyor or the like.

[0002]

2. Description of the Related Art For example, in thermal power plants and steelworks,
Coal discharged from the ship is transported using a belt conveyor. The belt conveyor is installed continuously over a long distance, and coal is conveyed, for example, to a boiler or a coke oven several hundred meters to several kilometers away. Coal may ignite spontaneously due to heat storage. Therefore, in order to prevent spontaneous ignition, a fire extinguishing nozzle is provided on the belt conveyor to spray water to suppress self-heating.

[0003]

Conventionally, the water spray pattern of the fire extinguishing nozzle used in the past was circular. Therefore, if the fire extinguishing nozzle was installed on a belt conveyor having a very long vertical direction, the water spray range would match the shape of the conveyor. Useless watering increases. Further, since the belt conveyor is continuously installed over a long distance, if the watering pattern is circular, a large number of fire extinguishing heads must be installed. Therefore, an object of the present invention is to obtain a fire-extinguishing nozzle in which a watering range (pattern) is rectangular.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is intended for a fire extinguishing system including a nozzle body having a water outlet and a cylindrical frame connected to the nozzle body. In the nozzle, a pair of openings are provided in the diameter direction of the frame, and the openings are formed to be larger than the water outlet. Further, the frame is formed in a cylindrical shape with a bottom, and a plurality of slit-shaped nozzle holes are provided from a bottom wall to a peripheral wall of the frame.

[0005]

5 and 6 are views for explaining a watering pattern of a fire extinguishing nozzle N according to the present invention. The fire extinguishing nozzle N is installed above a belt conveyor that conveys combustibles, for example. The mounting location of the fire extinguishing nozzle N may be limited, and the fire extinguishing nozzle N is installed above the belt conveyor, for example, within an installation height of 1 m to 50 cm. And in this embodiment, at this mounting height,
As shown in FIG. 6, a rectangular watering pattern B having a length of 4 m and a width of 1 m is provided. These numerical values are merely examples, and a desired rectangular pattern can be obtained by changing the size of an opening or a nozzle hole described later or changing the angle of a cone.

FIG. 1 is a front view of a fire extinguishing nozzle N according to the present invention.
FIG. 2 is a sectional view of the fire extinguishing nozzle N, and FIG.
FIG. 4 is a bottom view of the fire extinguishing nozzle N. In the figure, reference numeral 10 denotes a cylindrical nozzle body, and a water discharge channel 1 is provided at the center.
One. The water discharge channel 11 is formed in a tapered shape so that the inner diameter becomes smaller toward the lower side.
Are formed. A male screw portion 13 is provided at an upper portion of the nozzle body 10 and is connected to a pipe (not shown). Below the male screw portion 13, a flange portion 14 having a hexagonal cross section is provided, and a jig (not shown) is fitted into the flange portion 14,
The fire extinguishing nozzle N can be screwed into the aforementioned pipe. A male screw part 15 is formed at the lower end of the nozzle body 10.

A frame 20 has a bottom wall 22 and a peripheral wall 23 and is formed in a bottomed cylindrical shape. A female screw portion 21 is provided on the upper portion of the inner surface of the frame 20, and the male screw portion 15 of the nozzle body 10 is screwed in so that the nozzle body 10 and the frame 20 are connected. A pair of horizontally long openings 24 that open in the diameter direction are provided in the peripheral wall 23 of the frame 20. Opening in the direction of the diameter A means that two openings 24 are provided on a diagonal of 180 degrees (see FIG. 4).

As shown in the sectional view of FIG. 2, the size of the opening 24 is formed to be larger than that of the water outlet 12. That is, the width of the opening 24 is larger than the inner diameter of the water outlet 12, and the opening area of the opening 24 is larger than the area of the water outlet 12. Note that the height of the opening 24 is formed larger than a nozzle hole 25 described later, and the opening 24 is also an example of the nozzle hole, like the slit-shaped nozzle hole 25.

Reference numeral 25 denotes a nozzle hole which extends from the bottom wall 22 to the peripheral wall 23.
To form a slit. As shown in the bottom view of FIG. 4, a plurality of nozzle holes 25 are formed radially at equal intervals. The nozzle holes 25 in the bottom wall 22 are all the same length, but in the peripheral wall 23, the opening 2
4 is formed so as to have the highest height, and the nozzle hole 2 on the side orthogonal to the opening 24 is formed.
5d has the lowest height. That is, from the side orthogonal to the opening 24 toward the opening 24, the nozzle holes 2
5d, nozzle hole 25c, nozzle hole 25b, nozzle hole 25
The height is gradually increased to a (see the side view in FIG. 3). The opening 24 is higher than the nozzle hole 25a.

Referring to the bottom view of FIG. 4, in other words, the height of the nozzle hole 25 gradually increases in the direction of the diameter A, and the nozzle hole 25 is symmetrical with respect to the diameter A. 25 are provided. Thus, the nozzle hole 25
The height of the nozzle hole 25 is changed according to the length of the watering distance, so that a vertically long watering pattern is obtained. In other words, the height of the nozzle hole 25 in the direction in which a long distance is desired to be obtained is increased accordingly.

The number, height, and slit width of the nozzle holes 25 are appropriately selected so as to match the shape of a conveyor or the like to be protected. Although a plurality of nozzle holes 25 are formed radially at equal intervals, the angles from the center of the bottom wall 22 need not be equal. The nozzle hole 25
As the distribution of the bottom wall 22 and the peripheral wall 23, a large number of nozzle holes 25 may be provided near the opening 24 to reduce the number of nozzle holes 25 near the side orthogonal to the opening 24. That is, the interval between the nozzle holes 25 is formed to be dense on the opening 24 side, and conversely, on the side orthogonal to the opening 24, the interval between the nozzle holes 25 is made large and rough. Good. In this way, a rectangular watering pattern can be obtained only with the nozzle holes 25 without the opening 24.

Reference numeral 27 denotes a cone (projection) formed in a conical shape.
Thus, it is provided above the center of the bottom wall 22 of the frame 20.
The tip of the cone 27 is located below the upper end of the opening 24.

Next, the angle of the cone 27 will be described.
First, in FIG. 5, the fire extinguishing nozzle N is installed about 1 m above the upper surface 18 of the belt conveyor. At this time, the angle θ of the cone 27 is determined by the size of the desired watering range. That is, the angle formed by the line connecting the longitudinal end of the watering range to be protected and the mounting height position of the fire extinguishing nozzle N is the angle θ of the cone 27. Here, since the length of the desired watering range in the longitudinal direction is 4 m, the angle of the cone 27 is determined according to the length. For example, if the watering range is longer than 4 m, the cone 27 If the height is the same, the angle may be widened, and if the watering range is short, the angle may be narrowed.

Next, the width of the opening 24 will be described. 6, the relationship between the opening 24 of the fire extinguishing nozzle N and the desired watering range B will be described. The width of the opening 24 is determined by the size of the desired watering range. That is, the position of the line on the peripheral wall 23 connecting the two corners at the longitudinal end of the watering range B to be protected and the center of the fire extinguishing nozzle N is the width of the opening 24. Here, since the width of the desired watering range in the short direction is 1 m, the width of the opening 24 is determined according to the length. For example, when the watering range is larger than 1 m, If the width of the portion 24 is increased, and conversely the watering range is reduced, the width of the opening 24 may be reduced.

The fire extinguishing nozzle N of the present invention is configured as described above, and is provided with a pair of openings 24 in the diameter direction. For this reason, the water supplied from the water discharge port 12 and hitting the cone 27 is discharged from the side of the frame 20 where the opening 24 is provided, and the water flow is discharged so as to be substantially divided in the left-right direction with respect to the frame 20. , Resulting in a vertically elongated rectangular watering pattern. In addition, since the opening 24 is formed larger than the water outlet 12, a large amount of water flows in the left-right direction, and the rectangular watering pattern has a shape that is particularly long in the longitudinal direction. Further, since the cone 27 is provided at the upper center of the bottom wall 22 of the frame 20, the water supplied from the water outlet 12 is blown away from the opening 24 along the upper surface of the cone 27.

The frame 20 is formed in a cylindrical shape with a bottom, and a plurality of slit-shaped nozzle holes 25 are formed in a peripheral wall 23 of the frame 20.
, Water can be sprinkled not only in the longitudinal direction but also in the short direction. Since the nozzle hole 25 is provided from the peripheral wall 23 to the bottom wall 22, water is sufficiently sprayed also around the lower side of the fire extinguishing nozzle N. The nozzle hole 25a provided adjacent to the opening 24 is formed so as to be higher than the other nozzle holes 25, so that the region sprayed by the opening 24 and the water sprayed by the plurality of nozzle holes 25 are formed. It is possible to spray water properly even in an oblique area between the areas.

In particular, by setting the angle of the cone 27 as described above, when the fire extinguishing nozzle N is installed 1 m above the conveyor, a water spray pattern of 4 m in the longitudinal direction can be obtained. Is set as described above, the lateral width of the watering pattern can be set to 1 m.

In this embodiment, the case where the fire extinguishing head N is installed above the belt conveyor for transporting combustibles has been described. However, the present invention is not limited to this embodiment, and is not limited to this embodiment. May be installed anywhere as long as the protection range of the is rectangular.

[0019]

The present invention is configured as described above.
A rectangular watering pattern can be obtained. In particular, the structure is very simple, consisting only of the nozzle body and the frame, and the watering hole can be manufactured at low cost because only a wide opening and a slit-shaped nozzle hole are provided.

Further, a plurality of nozzle holes are provided from the bottom wall to the peripheral wall of the frame, and the height of the nozzle holes is gradually increased in the diameter direction, and the nozzle holes are provided symmetrically with respect to the diameter. Therefore, the higher the height of the nozzle hole, the farther the water is sprayed, so that a rectangular or elliptical watering pattern can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view of a fire extinguishing nozzle N of the present invention.

FIG. 2 is a sectional view of a fire extinguishing nozzle N.

FIG. 3 is a side view of a fire extinguishing nozzle N.

FIG. 4 is a bottom view of the fire extinguishing nozzle N.

FIG. 5 is a diagram for explaining a watering pattern of a fire extinguishing nozzle N.

FIG. 6 is a view for explaining a watering pattern of a fire extinguishing nozzle N.

[Explanation of symbols]

10 nozzle body, 11 water outlet, 12 water outlet,
13 male thread, 14 flange, 15 male thread, 20 frame, 22 bottom wall, 21 female thread, 23 peripheral wall, 24 opening, 25 nozzle hole, 27 cone, N fire extinguishing nozzle, 18 belt conveyor top surface,

Claims (5)

[Claims] 1. A fire-extinguishing nozzle including a nozzle body having a water outlet and a cylindrical frame connected to the nozzle body, wherein a pair of openings are provided in a diameter direction of the frame, and the openings are A fire-extinguishing nozzle formed to be larger than the water outlet. 2. The fire extinguishing nozzle according to claim 1, wherein the frame is formed in a bottomed cylindrical shape, and a plurality of slit-shaped nozzle holes are provided from a bottom wall to a peripheral wall of the frame. 3. The fire extinguishing nozzle according to claim 1, wherein a cone is provided at a central upper portion of a bottom wall of the frame. 4. A fire-extinguishing nozzle including a nozzle body having a water outlet and a bottomed cylindrical frame connected to the nozzle body, wherein a plurality of nozzle holes are provided from a bottom wall to a peripheral wall of the frame. A fire extinguishing nozzle characterized in that the height of the nozzle hole is gradually increased in the diameter direction, and the nozzle hole is provided symmetrically with respect to the diameter. 5. The fire extinguishing nozzle according to claim 1, wherein the fire extinguishing nozzle is installed above a belt conveyor for transporting combustible materials.