JPH0117320Y2 - - Google Patents

Description

[Detailed explanation of the invention] a. Purpose of the invention (industrial field of application) The wide-angle fire extinguishing nozzle according to this invention sprays water or liquid extinguishing agent in a circular area at a wide angle when extinguishing a fire. Used to spray.

(Prior art) When extinguishing a fire by spraying water or liquid extinguishing agent toward a fire site, it is effective to spread the sprayed water or liquid extinguishing agent over a wide angle. This is important for carrying out proper fire extinguishing work.

For this reason, wide-angle fire extinguishing nozzles having various structures have been used. For example, Jikko 55
Japanese Patent No. 12824 discloses a wide-angle fire extinguishing nozzle having a structure as shown in FIG. This conventional wide-angle nozzle for fire extinguishing uses a blade piece 2 having blades 1 of the same shape and twisted at equal angles formed on the peripheral edge of a disk as shown in FIG. It is inserted between the piece 4 and fixed. When extinguishing a fire, the liquid pumped through the liquid pipe 3 flows into the nozzle piece 4 while swirling by passing between the blades 1, 1 of the blade piece 2.
The liquid is ejected from the spout 5 while continuing its swirling motion, and the centrifugal force based on this swirling motion causes the liquid to spread outward.

(Problems to be Solved by the Invention) However, in the conventional wide-angle fire extinguishing nozzle constructed and operated as described above, the following disadvantages occur.

That is, when increasing the spreading angle of liquid in a wide-angle extinguishing nozzle having the structure shown in FIG. If the rotational speed of the swirling flow induced by step 2 is increased, but if the spread angle is increased to a certain extent, the cross section of the sprayed liquid becomes donut-shaped as shown in Figure 9, and the liquid is concentrated in the center. fire-fighting operations become impossible.

There are various other types of wide-angle nozzles for extinguishing fires, but all of them produce uneven spray or are complicated to manufacture and expensive.

The wide-angle nozzle for fire extinguishing of the present invention eliminates the above-mentioned disadvantages and makes it possible to spray fire extinguishing liquid in a circular area at a wide angle.

b. Structure of the invention (means for solving the problem) The wide-angle fire extinguishing nozzle of the invention is suitable for extinguishing a hose that transfers a fire extinguishing liquid such as water or a liquid extinguishing agent, or a passage in the main body of a fire extinguisher. It consists of a base body that is bonded and fixed to the end of the liquid supply path, a nut-shaped cover that is attached to the base body, and a wing piece that is held between this cover body and the base body.

Among these, the end surface of the base body has a conical convex shape, and an annular groove is formed in this end surface. The inside of this annular groove and a liquid passage hole provided at the center of the base and communicating with the fire extinguishing liquid supply path are communicated with each other by a communication hole, and the extinguishing liquid sent through the supply path is passed through the annular groove. We are making it possible to send up to .

One of the covers includes a plurality of blades into which blade pieces can be fitted in a portion of the conical cover plate portion that is in close contact with the end face of the base body and is aligned with the annular groove on the surface facing the base body. A circular concave portion is formed, a plurality of spout ports are formed in succession to the circular concave portion for spouting the liquid fire liquid after passing through the blade piece in a divergent shape, and further, at the peripheral edge of the surface where the spout ports open, The jetting direction of the fire extinguishing liquid spouted from each spout is adjusted to form an annular vertical wall that makes the cross section of the sprayed fire extinguishing liquid circular.

The blade pieces that fit inside the circular recess of the cover and are held between the base and the cover are similar to the blade pieces used in the conventional wide-angle fire extinguishing nozzle described above, and have the same shape as the peripheral edge of the disc. A blade made of multiple blades twisted at equal angles is used.

(Function) In the wide-angle extinguishing nozzle of the present invention configured as described above, when extinguishing liquid is sent from the extinguishing liquid supply path to the liquid passage hole of the base, this liquid flows through the communication hole and the annular groove. It is fed into an annular groove into which a blade piece is fitted, and while passing through the annular groove, the flow direction is changed by the blades of the blade piece, resulting in a swirling flow. Next, this extinguishing liquid is spouted out from a plurality of spout ports provided in the cover while swirling, and spreads out in a widening shape due to the centrifugal force accompanying this swirling. Since the directions of the plurality of ejection ports are slightly different from each other,
The extinguishing liquid ejects from each spout in slightly different directions, trying to spray the extinguishing liquid over a wide angular range. However, in this case, the area where the fire extinguishing liquid is sprayed will be non-circular, but in the case of the wide-angle nozzle of the present invention, the fire extinguishing liquid spouted from each spout is further guided to an annular vertical wall formed on the cover. As a result, the cross section becomes circular, and the cross section extends over a wide range.

(Example) Next, the present invention will be explained in more detail by explaining the illustrated embodiment.

1 and 2 show a first embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view and FIG. 2 is an end view seen from below in FIG. 1.

Among the base body 6, the covering body 7, and the plurality of blade pieces 2, 2, which constitute the wide-angle fire extinguishing nozzle, the base body 6 has a hexagonal flange 8 on the outer peripheral surface, and a liquid passage hole 9 is provided in the center. There is. The liquid passage hole 9 is open at one end surface of the base body 6, and the other end surface of the base body 6 on the opposite side to this opening is a conical convex surface 10. An annular groove 11 is formed in this conical convex surface 10, and this annular groove 11 and the liquid passage hole 9 are connected to a plurality of communication holes 1.
2 and 12 communicate with each other.

On the other hand, the cover 7 is formed in the shape of a cap nut as a whole, and the base 6 at the outer peripheral edge of the cover plate 13 is formed in a conical shape so as to be in close contact with the conical convex portion of the base 6.
A cylindrical portion 14 with a female thread carved on the inner peripheral surface is provided on the side opposite to the base body 6, and an annular vertical wall 17 is provided on the side opposite to the base body 6.
are provided for each. On the surface of the cover plate 13 facing the annular groove 11, four circular recesses 15, 15 are provided at equal intervals in a portion aligned with the annular groove 11. In each circular recess 15, 15,
Wing pieces 2, 2 as shown in FIG. 8 are fitted inside, respectively, so that the extinguishing liquid passing through these circular recesses 15, 15 moves in the swirling direction. Four jet ports 16, 16 opened in a portion of the outer surface of the cover plate portion 13 surrounded by the vertical wall 17 communicate with circular recesses 15, 15 into which the blade pieces 2 are fitted, respectively.

Constructed as described above, each circular recess 15, 15
The cover body 7, into which the blade piece 2 is fitted, is formed by screwing a female screw cut into the inner peripheral surface of the cylindrical portion 14 into a male screw carved into the outer peripheral surface of the end portion of the base body 6, and tightening the cover body 7.
Combined with this, it becomes a wide-angle nozzle for fire extinguishing.

The wide-angle fire extinguishing nozzle of the present invention is used by being attached to the tip of a fire extinguishing liquid supply path such as a hose that sends out extinguishing liquid, like conventional nozzles. The extinguishing liquid sent into the liquid passage hole 9 flows into each of the circular recesses 15, 15 through the communication holes 12, 12, and while passing through the circular recesses 15, 15, the flow direction changes to the swirling direction. After being converted, it is ejected from each of the ejection ports 16, 16, and is sprayed in a shape that spreads toward the end. Each spout 16,
16 are slightly different in direction, the extinguishing liquid spouted from the four spout ports 16, 16 is
First, it tries to spread to the state shown by the solid line in FIG.
The cross section of this solid line state is non-circular and cannot be said to be the best state for fire extinguishing work, but in the case of the nozzle of the present invention, the liquid extinguishing agent spouted from each spout 16, 16 further spreads to the surrounding area. The fire extinguishing liquid is guided by the vertical wall 17 and has a circular cross section as shown by the chain line in the figure, and the fire extinguishing liquid is evenly spread over a wide circular area.

Next, FIGS. 4 and 5 show a second embodiment of the present invention. In this embodiment, the number of spouts 16 provided in the cover plate portion 13 of the cover body 7 is seven, so that the extinguishing liquid can be evenly spread over a wider area. That is, one spout 16 is disposed in the center of the cover plate, and six spouts 16, 16 are arranged concentrically around this spout 16, and extinguishing fire is emitted from each spout 16, 16. The liquid is spread out as shown in FIG.

c. Effects of the invention The wide-angle fire extinguishing nozzle of the present invention is configured and operates as described above, so it is possible to evenly spray the extinguishing liquid over a wide circular area.
Fire extinguishing work using fire extinguishing liquid can be carried out efficiently.

[Brief explanation of the drawing]

Figures 1 and 2 show the first embodiment of the wide-angle nozzle for fire extinguishing of the present invention, in which Figure 1 is a longitudinal sectional view, Figure 2 is a view from below Figure 1, and Figure 3 is a view of the same. Figures 4 to 6 are similar to Figures 1 to 3 showing the second embodiment; Figure 7 is an example of a conventional wide-angle fire extinguishing nozzle; A vertical cross-sectional view, FIG. 8 is a perspective view of the vane used in this nozzle and the nozzle of the present invention, and FIG. 9 shows the spread state of the extinguishing liquid when the injection angle is increased with the structure of this conventional nozzle. FIG. 7 is a diagram corresponding to the AA cross section in FIG. 7; 1: Blade, 2: Blade piece, 3: Liquid feeding pipe, 4: Nozzle piece, 5: Spout port, 6: Base body, 7: Cover body, 8: Flange, 9: Liquid passage port, 10: Conical convex surface, 11:
Annular groove, 12: Communication hole, 13: Cover plate part, 14:
Cylindrical part, 15: Circular recess, 16: Spout, 17:
Standing wall.

Claims (1)

[Scope of utility model registration request] The end face has a conical convex shape, and an annular groove is formed on this end face, and the inside of the annular groove and a liquid passage hole provided at the center of the base and communicating with the fire extinguishing liquid supply path are communicated with each other by a communication hole. and a base body that allows the fire extinguishing liquid sent through the fire extinguishing liquid supply channel to be fed into the annular groove, and a cap nut shape that is attached to this base body and is in close contact with the end surface of the base body. A plurality of circular recesses into which blade pieces can be freely fitted are formed in a portion of the conical cover plate portion facing the base and aligned with the annular groove, and continuous to the circular recesses, A cover that forms a spout that spouts the extinguishing liquid after passing through the blade in a widening shape, and has an annular vertical wall formed on the periphery of the surface where the spout opens, and a space between this cover and the base body. A wide-angle fire extinguishing nozzle consisting of a plurality of vanes of the same shape and twisted at equal angles formed around the peripheral edge of a disc that is held between the blades.