JPH0554997B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a water spray nozzle for immediate use that extinguishes a fire that occurs in the immediate vicinity of a nozzle installation position.

(Prior art) Conventionally, water nozzles have been installed as fire extinguishing equipment in facilities with wide fire extinguishing areas, such as ball game stadiums and exhibition halls. The water spray nozzle is directed to the fire source position by horizontal rotation, and the water spray distance can be determined by changing the elevation angle of the water spray nozzle, or by maintaining the elevation angle at a predetermined angle (for example, the angle that provides the maximum water spray distance). Adjustments are made by changing the pressure, etc.

(Problem to be solved by the invention) However, when extinguishing a fire using such conventional water spray nozzles, the shortest water spray distance remains around 10 to 20 meters, and it is difficult to prevent fires occurring near the nozzle installation location. There was a problem that it was difficult to extinguish the fire effectively because the distance was too close.

Therefore, it may be possible to install a spray nozzle or the like for short-range fire extinguishing in the water nozzle, and in the case of a recent fire, switch to the spray nozzle to extinguish the recent fire. However, in the case of this type of fire extinguishing system, the fire is not limited to the immediate fire in front of the nozzle, but also the immediate fire at the rear of the nozzle, which is the position of the support post (rotating table) on which the nozzle is rotatably mounted. The ability to effectively extinguish fires is also required, and with conventional spray nozzles, it has been difficult to spray water to the rear of the nozzle.

(Means for Solving the Problems) The present invention has been made in view of such conventional problems. The purpose is to provide a water spray nozzle for use.

In order to achieve this object, the present invention includes a rectifier tube that suppresses the rotation of the water flow of pressurized extinguishing water in the immediate water discharge nozzle that extinguishes a fire that occurs in the vicinity of the nozzle installation position; a nozzle tube having a conical constriction shape attached to the tip of the straightening tube, a rod extending outward through the center of the nozzle tube, and a conical bridge member attached to the tip of the rod; A plurality of first deflector arms whose tips extend radially over approximately the lower half of the outer periphery of the bridge member and whose tips are bent rearward; and a rearward bending arm disposed above the first deflector arm. A plurality of second deflector arms having no section are provided.

(Function) According to the immediate water discharging nozzle of the present invention having such a configuration, the water flow whose rotation is suppressed by the rectifier tube is constricted by the nozzle tube and discharged to the outside along the rod, and is attached to the tip of the rod. It is diffused by the piece members. Since the first deflector arm is attached to the lower half of the bridge member in a radial manner, the fire extinguishing water discharged from the nozzle tube hits the first deflector arm and is reflected radially to the side. Further, since the tip of the first deflector arm is bent rearward, a portion of the fire extinguishing water is radiated to the rear of the nozzle through the bent portion.

On the other hand, the discharge of fire extinguishing water in front of the nozzle is
The fire extinguishing water atomized by the deflector arm is discharged to the immediate area in front of the nozzle, and furthermore, for a far distance within the immediate fire extinguishing area, it is atomized by the second deflector arm provided on the upper side of the bridge member. Fire extinguishing water and fire extinguishing water diffused along the upper outer periphery of the bridge member not provided with the deflector arm are radiated.

(Example) FIG. 1 is an explanatory diagram showing an example of the present invention, and a part of the nozzle is cut away to show the internal structure.

In FIG. 1, reference numeral 1 denotes a rectifier tube, which has a rectifier plate 2 built therein, and suppresses the rotation of the flow of fire extinguishing water supplied under pressure from a fire extinguishing pump. Rectifier tube 1
At the tip of the nozzle tube 3, the nozzle tube 3 has a conical constriction shape.
is fixed with screws. A support ring 4 with passages formed at four locations is provided between the rectifying tube 1 and the nozzle tube 3.
is incorporated, and a rod 5 is placed in the center of the support ring 4.
By fixing the rod 5, the tip of the rod 5 extends outward through the center of the nozzle tube 3. Nozzle tube 3
A bridge member 6 having a conical shape that widens forward is fixed to the tip of the rod 5 which extends further to the outside. A plurality of first deflector arms 7, five in this embodiment, extend radially over approximately the lower half of the outer circumference of the bridge member 6, and the tip of the first deflector arm 7 is located on the nozzle cylinder 3 side. A rear bent portion 7a is formed which is bent rearward. Further, two second deflector arms 8 are radially extended above the first deflector arm 7 provided on the bridge member 6 at symmetrical positions, and the second deflector arm 8 is connected to the first deflector arm 7. Posterior bend 7 as in
It doesn't have a.

FIG. 2 shows the bridge member 6 and deflector arms 6, 8 provided at the tip of the rod 5 shown in FIG. Five first deflector arms 7 extend radially over the half, and as shown in the side view of FIG. 7a, and the angle α of the rear bent portion 7a is in the range of α=120° to 160°, and is set to α=135°, for example.

FIG. 4 is an explanatory diagram showing the installed state of the immediate water discharge nozzle of the present invention shown in the embodiment of FIG. 1.

In FIG. 4, reference numeral 9 denotes a pedestal on which a water spray nozzle is installed. A horizontal rotating part 10 is installed on the pedestal 9, and a water spray nozzle 11 for long and medium distances is mounted on the horizontal rotating part 10 at a predetermined position with respect to the horizontal plane. It is rotatably mounted with an elevation angle θ of . Water nozzle 1 for long and medium distances
A three-way switching valve 12 is provided on the inlet side of the valve 1, and a water discharge nozzle 14 for immediate use according to the present invention shown in FIG. The elevation angle of the water nozzle 14 is
It is set to 0°.

Here, the water spray nozzle 11 for long and medium distances has an elevation angle θ
is set to, for example, θ=25°, which provides the maximum water discharge distance determined experimentally, and the water discharge distance is controlled by pressure control of the water discharge pressure to the water supply pipe 19. Furthermore, compressed air is supplied to the water spray nozzle 11 for long and medium distances through an air pipe 15, so that more effective water spray distance performance can be obtained by mixing the compressed air.

Of course, the fourth water spray nozzle 11 for long and medium distances is used.
In addition to fixing the elevation angle θ shown in the figure at an angle that gives the maximum water spraying distance and adjusting it by pressure control, it is also possible to adjust the water spraying distance by changing the nozzle elevation angle while keeping the water spraying pressure constant. . In any case, the immediate water spray nozzle 14 of the present invention is installed with a nozzle depression/elevation angle of 0° relative to the long-range water spray nozzle. Furthermore, the water spraying distance of the long and medium distance water discharging nozzle 11 can be adjusted in the range of, for example, 15 to 19 m by controlling the water discharging pressure.

Next, the operation of the above embodiment will be explained.

FIG. 5 is an explanatory plan view showing the water discharge pattern obtained by the immediate water discharge nozzle of the present invention shown in the embodiment of FIG. 1, and the shaded area is designated as the amount of water sprayed by the sprinkler head 5
This shows the effective watering range where water can be sprayed in an amount of approximately ¹ /min/m2.

That is, the point P in the effective water sprinkling range indicated by the shaded area corresponds to the immediate water discharging nozzle 14 of the present invention shown in FIGS. 1 and 4.
This is the position of the tip of the nozzle, that is, the tip of the bridge member 6 equipped with the deflector arms 6 and 8, and the effective water spraying range covers up to about 18 m in front of this nozzle position P, and at the same time covers about 1 m behind the nozzle position P.
can also be covered as an effective watering range.

As shown in FIG. 5, the operation of the immediate water discharging nozzle of the present invention, which provides an effective water spraying range including the front and rear areas of the nozzle position P, will be explained with reference to FIG. 1 as follows.

The fire extinguishing water supplied under pressure to the rectifier tube 1 is passed through the rectifier plate 2.
By passing through the water flow, rotation of the water flow is suppressed, and the water flow is narrowed down by the nozzle tube 3 and is discharged to the outside as a straight flow without turning into a swirling flow. The fire extinguishing water discharged from the nozzle tube 3 is discharged along the rod 5 extending outward through the center of the nozzle tube 3, and is discharged by a conical bridge member 6 attached to the tip of the rod 5. It will be spread. Since the first deflector arms 7 are radially provided on the lower half of the outer circumference of the bridge member 6, the water flow diffused by the bridge member 6 hits the first deflector arms 7, and a part of it is radially disposed on the lower half of the outer circumference of the bridge member 6. Furthermore, since the rear bent portion 7a is formed at the tip of the first deflector arm 7, the water flow diffused laterally by the first deflector arm 7 is directed toward the nozzle along the rear bent portion 7a. It is diffused and released in the direction returning to the cylinder 3 side, and as a result,
The area behind the nozzle position P shown in FIG. 5 can be covered as an effective water spraying range.

On the other hand, the water flow diffused by the bridge member 6 that has passed between the first deflector arms 7 is released in the form of a spray in front of the nozzle, and the water flow diffused above the bridge member 6 is dispersed through the channels provided on both sides of the upper part. When it hits the second deflector arm 8, it is atomized, and when it is diffused by the bridge member 6, it becomes a hollow atomized state, but when the diffused water flow hits the second deflector arm 8 and the first deflector arm 7, it is atomized. As a result, as shown in Figure 5, it is possible to obtain a roughly gourd-shaped effective watering area that covers a watering distance of about 18m.

Of course, as shown in FIG. 4, the immediate water spray nozzle of the present invention is installed on the horizontal rotating part 10 that can freely rotate horizontally, so it is directionally controlled in the direction of the fire source. Approximately from the nozzle position P including the rotation center of the horizontal rotating part 10 (nozzle rear position)
Can effectively extinguish recent fires that occur within a range of 18m.

FIG. 6 is an explanatory view showing another embodiment of the deflector arm disposed in front of the nozzle tube 3 of the present invention.

Regarding the deflector arm in Fig. 6,
Similar to the embodiment shown in FIG. 2, approximately half of the lower side of the bridge member 6 has a backward bent portion 7a at its tip, as shown in FIG.
There are four first deflector arms 7 extending radially, and two second deflector arms 8 extending radially in symmetrical positions at two locations above the bridge member 6. There is. In addition, in the embodiment shown in FIG. Auxiliary arms 17 extend radially to the ring member 16, and the ring member 16 and the auxiliary arms 1
7 further improves the spray efficiency of fire extinguishing water discharged forward through between the first deflector arms 7.

FIG. 8 is an explanatory view showing another embodiment of the deflector arm installed in front of the nozzle tube 3 of the immediate water discharge nozzle of the present invention. As in the example, the rear bent portion 7a extends over approximately half of the lower side of the bridge member 6 as shown in FIG.
There are five first deflector arms 7 extending radially, and two second deflector arms 8 positioned above the bridge member 6 extending horizontally. Further, protrusions 18 are integrally formed on the left and right in the middle of the first deflector arm 7 extending radially from the lower half of the bridge member 6, and the protrusion pieces 18 allow the space between the first deflector arms 7 to be This increases the efficiency of the spray of fire extinguishing water that is released forward through the fire extinguisher.

(Efficiency of the Invention) As explained above, according to the present invention, a nozzle tube having a conical constriction shape is attached to the tip of the rectifier tube that suppresses the rotation of the flow of pressurized extinguishing water, and the center of the nozzle tube is A conical bridge member is provided at the tip of the rod extending outward through the rod, and the bridge member extends radially over approximately the lower half of the outer circumference of the bridge member,
By providing a plurality of first deflector arms whose tips are bent backwards and a plurality of second deflector arms having no rearward bending portion and arranged above the first deflector arms, Not only can you obtain a water spray pattern that can effectively extinguish the immediate fire in front of the nozzle, but you can also effectively spray fire extinguishing water behind the nozzle, and you can also effectively extinguish the immediate fire at the nozzle installation location (center of nozzle rotation). All fires can be extinguished effectively.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an embodiment of the present invention with a part cut away, Figs. 2 and 3 are explanatory diagrams showing the defleter part of Fig. An explanatory diagram showing the installation state of the water spray nozzle, Fig. 5 is an explanatory diagram showing the effective water spraying range according to the present invention, and Figs. 6 and 7 and Figs. 8 and 9 are other embodiments of the defleter section used in the present invention. FIG. 1... Rectifier tube, 2... Rectifier plate, 3... Nozzle tube, 4... Support ring, 5... Rod, 6...
... Bridge member, 7... First deflector arm, 7a
... Rear bending part, 8 ... Second deflector arm, 9 ... Frame, 10 ... Horizontal rotation part, 11 ...
Cylindrical nozzle, 12... Three-way switching valve, 13... Branch pipe, 14... Immediate fire extinguishing nozzle, 15... Air piping, 16... Ring member, 17... Auxiliary arm, 18... Projection, 19... ...Water supply piping.

Claims (1)

[Scope of Claims] 1. In an immediate water discharge nozzle for extinguishing a fire that has occurred in the immediate vicinity of the nozzle installation position, a rectifier tube that suppresses the rotation of the water flow of pressurized extinguishing water, and a rectifier tube at the tip of the rectifier tube. An attached nozzle cylinder having a conical constriction shape, a rod extending outward through the center of the nozzle cylinder, a conical bridge member provided at the tip of the rod, and an outer circumference of the bridge member. A plurality of first deflector arms that extend radially over approximately half of the lower side and have their tips bent rearward; and a plurality of first deflector arms that do not have a rearward bending portion and are arranged above the first deflector arms. A water spray nozzle for immediate use, characterized by being equipped with two deflector arms.