JPS6257570A - Fire extinguishing/cooling head - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a fire extinguishing/cooling head used for extinguishing fires, cooling combustible materials, etc.

[Prior art]

A conventional fire extinguishing/cooling head used for extinguishing fires in buildings, underground malls, tunnels, etc., or for cooling and extinguishing oil and gas storage tanks, etc., has a water outlet 9 as shown in Fig. 5. An arm body 11 is attached to the head body 1, a deflector 13 is fixed to the tip of the arm body 11 by screwing or caulking, and a fire extinguishing/cooling liquid such as water (hereinafter referred to as fire extinguishing liquid) is discharged from the water outlet 9. (referred to as a liquid) is caused to collide with the deflector 13 and dispersed around it.

[Problems with conventional technology]

Incidentally, the fire extinguishing/cooling head is required to have no difference in the amount of fire extinguishing liquid sprayed per unit area in order to be effective in extinguishing or cooling.

However, there are a wide variety of locations where extinguishing and cooling heads are installed, and the pressure of the extinguishing liquid supplied varies greatly depending on the altitude difference from the supply source, pump capacity, friction loss in piping, etc.

For this reason, conventionally, the shape of the deflector 13 is different.
In other words, it is necessary to prepare various fire extinguishing and cooling heads with different spray angles, prepare various heads with different flow rates by changing the size of the water outlet, or adjust the pressure and flow rate in the middle of the piping. By providing valves and orifices, etc., there is no difference in the amount of spray per unit area, regardless of the difference in the supply pressure of the extinguishing liquid.

[Means for solving problems]

This invention is aimed at a fire extinguishing/cooling nozzle that can be used in locations where the supply pressure of fire extinguishing liquid is different in class 1a.
In the extinguishing/cooling head that sprays the cooling liquid by colliding with the deflector supported by the head main body, a pressure response part is provided that responds to the supply pressure of the extinguishing/cooling liquid,
A flow regulator is provided between the water outlet and the deflector to convert the extinguishing/cooling liquid discharged from the water outlet into a flow having a trumpet-shaped cross section, and the distance between the flow regulator and the deflector is set by the pressure response section. The present invention is characterized in that it is provided with a control means that changes it by control of.

[For production]

In the fire extinguishing/cooling head of the present invention, with the above-described characteristic configuration, the pressure-responsive body automatically changes the distance between the fluid regulator and the deflector according to the supply pressure of the fire extinguishing liquid,
This system automatically adjusts the spray angle of fire extinguishing liquid to ensure that there is no difference in spray amount.

〔Example 〕

Hereinafter, the fire extinguishing/cooling head of the present invention will be explained with reference to the embodiments shown in FIGS. 1 to 4.

FIG. 1 shows an embodiment of the device in which the fluid regulator is moved according to the supply pressure of the extinguishing liquid, and 1 is a head main body;
2 is a cylinder formed in the main body 1; 3 is an atmospheric communication hole 4;
5 is a piston valve housed in the cylinder 2, and the piston valve 5 opens the cylinder 2.
The interior is divided into a first firebox 6 and a second firebox 7, and the side wall of the first firebox 6 has a water inlet 8 connected to a fire extinguishing liquid pipe (not shown), and the bottom wall has a water inlet 8. A water discharge port 9 having a smaller cross-sectional area is provided, and a spring 10 is provided in the second fire chamber 7 to bias the piston valve 5 downward. 11 is the main body 1
A deflector 13 having a plurality of radial notch grooves 12 is attached to the lower end of the arm body 11 by screwing or caulking. Reference numeral 14 denotes a flow regulator that is provided between the water outlet 9 and the deflector 13 and converts the extinguishing liquid discharged from the water outlet 9 into a flow having a trumpet-shaped cross section, which will be described later. The piston valve 5 and the valve rod 15 are connected to each other via the piston valve 5 and the valve rod 15. Further, 16 is a guide hole provided in the arm body 11, and 17 is a guide rod provided in the rectifier 14.

And piston valve 5 and 1 firebox 6 and piston valve 5
A spring 10 that applies back pressure to the piston valve 5 and the valve stem 1 constitutes a pressure response part that responds to the supply pressure of the extinguishing liquid.
5 constitutes a control means for automatically changing the distance between the deflector 13 and the rectifier 14.

Next, the operation of this extinguishing/cooling head will be explained.

When a high pressure extinguishing liquid is supplied to the water supply port 8 and drained, this liquid is discharged from the water supply port 9 toward the deflector 13 and generates a large hydrostatic pressure within the first firebox 6.

Due to the hydrostatic pressure of the first firebox 6, the piston valve 5 is pushed up against the pressing force of the spring 10 as shown in FIG. 2, and the hydrostatic pressure of the first firebox 6 and the pressing force of the spring 10 are balanced. rises to. Then, the fluid regulator 14 also rises together with the piston valve 5, and the distance between the deflector 13 and the fluid regulator 14 increases. As shown in FIG. 2, the fire extinguishing liquid W discharged from the water outlet 9 flows downward along the flow regulating fluid 14 in the vicinity of its center, and spreads out in the outer portion due to the action of the fluid regulating fluid 14. flows. As a result, the vector component in the downward direction is large near the center, and the vector component in the horizontal direction becomes large as it goes outward.
In other words, a divergent flow in which the lateral vector component becomes stronger as it moves away from the rectifying fluid 14, and a flow having a trumpet-shaped cross section (hereinafter referred to as a trumpet-shaped flow) is produced. When this trumpet-like flow of extinguishing liquid W collides with the deflector 13, as shown in Fig. 2, the flow near the center has mostly downward vector components, so it is scattered near the sprinkler head. In the outer part of the flow, the lateral vector component increases as it moves away from the center, so it is spread horizontally in proportion to this, and as a result, the extinguishing liquid is spread uniformly over a wide area because the spray angle becomes wider. be done.

In addition, if the pressure of the supplied extinguishing liquid is low, 1
The hydrostatic pressure generated in the next chamber 6 is small, the piston valve 5 does not move as shown in FIG. 3 due to the action of the spring 10, and the distance between the deflector 13 and the fluid regulator 14 remains the shortest. Therefore, the fire extinguishing liquid W discharged from the water outlet 9 is made into a trumpet-like flow by the fluid regulator 14, but collides with the deflector 13 with a smaller horizontal vector component than the former. As a result, the extinguishing liquid has a narrow spraying angle as shown in FIG. 3, and is uniformly sprayed over a narrow area.

FIG. 4 shows an embodiment in which the deflector is moved according to the supply pressure of the extinguishing liquid.The difference from the embodiment in FIG. 1 is that a water outlet 9 is provided on the side of the cylinder 2,
A rectifier 14 is attached to the tip of the arm body 11, and the deflector 1
3 to the tip of the valve stem 15 extending from the piston valve 5.
The point is that it can be attached via the . And this implementation! In the case of Jl, as the pressure of the extinguishing liquid to be supplied increases, the piston valve 5 lowers, and at the same time the deflector 13 also lowers, increasing the distance between the deflector 13 and the rectifying fluid 14, and the extinguishing liquid increases. The dispersion angle is also widened so that there is no difference in the dispersion density per unit area.

If you want to adjust the spray density of the extinguishing liquid, that is, the spray angle at a predetermined supply pressure, remove the lid 3 in the embodiment shown in Fig. 1, or remove the lid 3 in the embodiment shown in Fig. 4. This is done by loosening the lock nuts 19, rotating the piston valves 5, and adjusting the elastic pressure of the springs 10.

In each of the above embodiments, the deflector 13 may have its peripheral edge bent into an arbitrary shape, and the flow regulator 14 may have a truncated conical shape, a cylindrical shape, or a combination of these shapes and a conical shape, etc. The spring 10 may be used as long as the spring 10 is connected to the secondary chamber 7 or the valve stem 15.
Alternatively, the guide rod 17 may be provided.

〔effect 〕

According to this invention, the spraying angle is automatically adjusted according to the pressure of the supplied extinguishing/cooling liquid, and it is possible to obtain an extinguishing/cooling head that can be used in a wide variety of locations with a single model. .

[Brief explanation of drawings]

1 and 4 are cross-sectional views of one embodiment of the fire extinguishing/cooling head according to the present invention, FIGS. 2 and 3 are diagrams illustrating its operating state, and FIG. 5 is a conventional example. 1...Head body, 5...Piston valve, 6...1
Next chamber, 8... Water supply port, 9... Water outlet, 10... Spring as elastic body, 13... Deflector, 14
...Fluid regulator, 15...Valve stem. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. In a fire extinguishing/cooling head that sprays fire extinguishing/cooling liquid discharged from a water outlet of the head body by colliding with a deflector supported by the head body, the fire extinguishing/cooling liquid is A pressure response part that responds to the supply pressure is provided, and a flow regulator is provided between the water outlet and the deflector to make the extinguishing/cooling liquid discharged from the water outlet into a flow having a trumpet-shaped cross section, and the flow regulator and the deflector are provided. A fire extinguishing/cooling head characterized in that it is provided with a control means for changing the distance between the deflector and the deflector by controlling the pressure response section. 2. The pressure response part communicates with the water supply port and the water discharge port.
The control means includes a next chamber, a piston valve that receives pressure generated in the primary chamber, and an elastic body that applies a force to resist the pressure applied to the piston valve from the primary chamber, and the control means includes the piston valve, 2. The fire extinguishing/cooling head according to claim 1, comprising a valve rod having one end connected to the piston valve and the other end connected to a fluid regulator or deflector.