JP2008125606A - Fire-extinguishing spray nozzle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fire-extinguishing spray nozzle capable of appropriately changing the atomizing performance by a simple and inexpensive method. <P>SOLUTION: The fire-extinguishing spray nozzle is composed of an orifice plate with a spout for spouting a liquid; a single or a plurality of control plates having a channel for applying the revolving power to the liquid and a revolving chamber for collecting the liquid from the channel; and a lid plate for composing the channel and the revolving chamber when required. These three kinds of plate members are layered on one another inside a nozzle head. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fire-extinguishing spray nozzle that sprays a liquid.

  A conventional fire-extinguishing spray nozzle of this type generally comprises an orifice member 2 fitted into the nozzle head 1 and a control member 3 fitted into the nozzle head 1 as shown in FIG. The orifice member 2 has a swirl chamber 2b and a flow path 2c leading to the nozzle 2a, and the control member 3 has a swirl groove 3a located between the swirl chamber 2b and the flow path 2c.

  The liquid enters the flow path 2c from the periphery of the control member 3 in the direction of the arrow, is given a swirl force by the swirl groove 3a, turns into a swirl in the swirl chamber 2b, and is sprayed as droplet fine particles as it is from the nozzle 2a. The

  However, in the conventional fire extinguishing spray nozzle of this type, as described above, the orifice member 2 having the swirl chamber 2b and the control member 3 having the swirl groove 3a are complicated in structure, so that they must be manufactured by cutting. Not only does this increase the nozzle manufacturing cost, but when changing the atomization performance to accommodate different fire extinguishing targets, you must cut new ones with different dimensions and shapes, Further, the manufacturing cost of the nozzle is increased, so that there is a problem that it is not possible to sufficiently cope with the change in the size and shape.

  The present invention has been made in view of the current state of the prior art, and an object thereof is to provide a fire-extinguishing spray nozzle capable of appropriately changing the atomization performance by an easy and inexpensive method.

The present invention includes one or a plurality of orifice plates each having an orifice plate having a nozzle for ejecting a liquid, a flow path for applying a swirling force to the liquid, and a swirl chamber for collecting the liquid from the flow path. A fire-extinguishing spray nozzle comprising a control plate and a cover plate for constituting the flow path and the swirl chamber, and comprising these three kinds of plate-like members stacked in a nozzle head .
Further, the present invention provides one or a plurality of orifice plates each having an orifice plate having a nozzle for ejecting liquid, a flow path for applying a swirling force to the liquid, and a swirl chamber for collecting the liquid from the flow path. It is a spray nozzle for fire extinguishing, which is composed of a single control plate and is configured by superposing these two kinds of plate-like members in a nozzle head.

  In the present invention, since the orifice plate and the control plate are formed as plate-like members, these can be manufactured by etching, laser processing or punching processing, and the manufacturing can be simplified and the cost can be reduced. The ability to easily change the atomization performance simply by changing the shape and shape makes it possible to easily and inexpensively manufacture different types of fire extinguishing targets (conditions for complex fire extinguishing), and easily respond to changes in the fire extinguishing targets There is.

  The fire-extinguishing spray nozzle according to the present invention is configured by superimposing an orifice plate, a control plate, and optionally a lid plate as a plate-like member in the nozzle head, and thus is compatible with various fire extinguishing targets in an easy and inexpensive manner. What has atomization performance can be realized. Hereinafter, specific embodiments thereof will be described as examples, but the present invention is not limited thereto.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a longitudinal side view showing a portion of the nozzle head 1, and FIG. 2 is an exploded perspective view showing three types of plate-like members in FIG.

  In the figure, 4 is an orifice plate having an injection hole 4a, 5 is a control plate having a hole 5a for forming a swirl chamber at the center and a notch 5b for forming a flow path leading to the swirl chamber, and 6 is a flow path. And a cover plate for constituting the swirl chamber. The control plate 5 and the cover plate 6 have a projecting piece 7 on the outer periphery, and the projecting piece 7 is fitted to the inner peripheral surface of the nozzle head 1 to form a communication path 8 between the control plate 5 and the cover plate 6. It is like that.

  In the present embodiment, as shown in each figure, the control plate 5 is made up of three sheets, and each control channel 5 is shifted by 120 degrees and overlapped with each other. As shown in FIG. 1, the holes 5a of the three control plates 5 communicate with each other to form one swirl chamber, and the notch 5b of each control plate 5 has three flow paths formed by plate members adjacent to each other. Is configured. In addition, the thickness of the three control plates 5 is about 0.3 to 6 mm, and about 0.1 to 2 mm per sheet, and the material can be made of metal, ceramic, plastic, or the like.

  The liquid enters the communication path 8 from the periphery of the cover plate 6 in the direction of the arrow, and then enters the swirl chamber (configured by the holes 5a) from the respective flow paths (configured by the notches 5b) of the control plates 5. The water enters from three directions into a uniform swirling flow, and is sprayed (as droplet fine particles) as it is from the nozzle 4a.

As shown in the figure, when the number of control plates 5 is three, as described above, spraying (droplet atomization) becomes uniform and the amount of spraying increases, but the number of control plates 5 may be one or two. It is the same that the spray effect of atomizing droplets can be obtained even when the number of sheets is three or more.
Thus, Table 1 shows that the spray (particulate fine particles) effect varies depending on the number of control plates 5 for each flow path arrangement.

  Since the atomization performance can be easily changed simply by changing the number of control plates 5 or changing the arrangement of the flow passages in this way, different fire extinguishing targets (conditions for complex fire extinguishing) are different. Can be manufactured easily and inexpensively.

  Next, in addition to changing the number (arrangement) of the control plates 5, by changing the diameter of the nozzle 4a and the cross-sectional area of the flow path formed by the notch 5b, the spray amount, the particle diameter, and the spray angle Since the spray distance can be changed, this difference is shown in Table 2. In the data shown in Table 2, the spray pressure is constant.

  From this data, the spray amount and particle diameter are proportional to the diameter of the nozzle 4a and the cross-sectional area of the flow path, the spray angle is proportional to the diameter of the nozzle 4a, but inversely proportional to the cross-sectional area of the flow path, and the spray distance is the nozzle 4a. It can be understood that it is inversely proportional to the diameter of the channel but proportional to the cross-sectional area of the flow path.

  In the above-described embodiment, three types of plate members, that is, an orifice plate, a control plate, and a cover plate, are stacked in the nozzle head. However, as shown in FIG. Thus, the plate member can be made into two types of the orifice plate 4 and the control plate 5 alone. Further, in the above-described embodiment, the three control plates 5 are arranged so as to be shifted by 120 degrees so that the directions of the notches 5b are evenly distributed. However, as shown in FIG. It is also possible to use a single control plate 5 provided with a number of notches 5b (four in the figure).

  Since the present invention can realize various atomization performances easily and inexpensively, it can be widely used for a fire-extinguishing spray nozzle for spraying a liquid.

It is a vertical side view which shows one Example of the spray nozzle of this invention. It is a perspective view which decomposes | disassembles and shows the plate-shaped member of FIG. It is a disassembled perspective view which shows the example which abbreviate | omitted the cover plate and used only the orifice plate and the control plate. It is a perspective view of the control board which has many notches. It is a vertical side view which shows the conventional spray nozzle.

Explanation of symbols

1: Nozzle head 4: Orifice plate 4a: Injection hole of orifice plate 4 5: Control plate 5a: Hole in control plate 5 5b: Notch in control plate 5 6: Cover plate 7: Projection piece of control plate 5 and cover plate 6 8: Communication path

Claims (2)

  An orifice plate having a nozzle hole for ejecting liquid, one or more control plates having a flow path for applying a swirling force to the liquid and a swirl chamber for collecting the liquid from the flow path; A fire-extinguishing spray nozzle comprising a cover plate for constituting the flow path and the swirl chamber, and comprising these three kinds of plate-like members superimposed in a nozzle head.   From an orifice plate having a nozzle for ejecting a liquid, and one or a plurality of control plates having a flow path for applying a swirling force to the liquid and a swirl chamber for collecting the liquid from the flow path A fire-extinguishing spray nozzle characterized in that these two types of plate-like members are superposed in a nozzle head.