JPS637255Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is designed to provide emergency firefighting functions by spraying extinguishing liquid or pressurized water in emergency firefighting operations at the site of a fire outbreak, such as on a ship. This invention relates to a liquid fire extinguishing nozzle for firefighting that ensures safety.

Hereinafter, an embodiment of the configuration of this invention shown in the drawings will be described.

At the rear of the fire extinguishing nozzle body, a high-pressure hose for pumping extinguishing pressure fluid such as pressurized water through a high-pressure pump or compressor is connected by a joint 1 in a valve box 2. For example, a ball valve 4, which is opened and closed by a handle 3, is installed in the gaskets 5 and 6. The fixed inner cylinder 8 of the fire extinguishing nozzle main body, which has a male thread 7 on a part of the outer periphery, is removably screwed onto the front part of this valve box 2, and the outer part of this fixed inner cylinder 8 is A female thread 9 that is screwed into the male thread 7 is set on the inner periphery of the top nozzle 10, and the top nozzle 10 is connected to the male thread 7 and the female thread 9.
It is set to be able to slide forward and backward in the axial direction due to the screw engagement relationship.

The fixed inner cylinder 8 is placed inside a cylindrical protruding wall 11 set at the center of the front side of the top nozzle 10.
For example, a tapered valve seat 14 is provided on a straight spout 13 provided in communication with a fire extinguishing pressure fluid passage 12 such as fire extinguishing pressure water, and a valve hole 1 is provided at the rear of the valve seat 14.
For example, a tapered movable valve body 16 with an enlarged rear end portion is provided through the valve body 5 . Several gland nozzles 17 with enlarged rear portions for dispersing and ejecting extinguishing pressure fluid are arranged on the outer peripheral inclined wall of the cylindrical projecting wall 11 of the top nozzle 10, and the pressure fluid is supplied to the gland nozzles 17 in two directions. For example, an elliptical ejection passage 1 for emitting concentrated and diffused ejection toward the tip.
9 and 20, and a fluid branching wall 18 having a substantially triangular cross section is integrally formed with the inner wall of the top nozzle 10 at the center of the rear thereof.

Further, a tapered fixed valve body 21, for example, which approaches and separates from the valve seat 14 to open and close the valve hole 15 is installed in the straight spout 13, and the rear part of the fixed valve body 21 is used to extinguish the fixed inner cylinder 8. It is set integrally with the front end of a spindle 23 which is screwed onto a fixed support frame 22 and fixed in the axial direction within the pressure fluid feed path 12 .

Furthermore, the movable valve body 16 is brought into contact with and separated from the peripheral wall of the pressure fluid outlet portion 24 formed between the front part of the fixed inner cylinder 8 and the spindle 23, so that the gland nozzle 17
Gasket 2 that opens and closes the pressure fluid outlet path 27 to
5 interposed fixed valve seats 26 are provided.

A pressure fluid collection outlet 28 is provided at the center of the front part of the fixed valve body 21, and two pressure fluid passages 29 are connected to the collection outlet 28 and extend toward the rear in a V-shape, for example, toward the front. 30 is installed obliquely, and as a result, as shown in FIG.
When the pressure fluid flow gap G between the valve seat 1 and the valve seat 14 is closed, the pressure fluid from the fluid jet passages 29 and 30 flows intensively to the collective jet port 28, and the pressure fluid is diffused and jetted from the collective jet port 28. I'm starting to let them do it.

In addition, a cushioning covering member 32 having several protrusions 31 in the axial direction, which is molded from a soft elastic material such as synthetic rubber, is fitted or integrally fixed on the outer periphery of the top nozzle 10. The abrasion resistance provided by the member 32 ensures rotation of the top nozzle 10 when manually gripped, and also prevents damage to the top nozzle 10 even if it is accidentally dropped during handling or fire extinguishing work. ing.

Now, the covering member 32 is grasped and the top nozzle 10 is rotated rightward via the covering member 32, and the top nozzle 10 is advanced in the axial direction due to the screw-engagement relationship between the male thread 7 and the female thread 9.
1, the fixed valve body 21 is brought into close contact with the straight opening 13 and the valve seat 14, closing the flow gap G of the pressure fluid, and at the same time, the movable valve body 16 is brought into contact with the fixed valve seat 2 of the fixed inner cylinder 8.
6, and the pressure fluid is discharged from the pressure fluid delivery port 2
4 and communicates with a pressure fluid outlet path 27 to the gland nozzle 17 .

Therefore, as shown in FIG. 5, the pressure fluid such as fire extinguishing liquid from the pressure fluid passage 12 of the fixed inner cylinder 8 is fed under pressure to the outlet passage 27 through the pressure fluid outlet 24, and this pressure fluid is passed through several glands. A large amount of extinguishing pressure fluid from the ground nozzle 17 is sprayed under pressure into the nozzle 17 in a densely expanded manner, for example, at an expansion angle of about 120 degrees, and this injected extinguishing fluid is used to extinguish, for example, a fire at a fire site in a cabin. It effectively sprays water on flaming objects (spraying distance of approximately 10m to 15m) to demonstrate the power of initial extinguishing, and also reliably prevents flame backfire, almost completely reducing the physical safety of firefighters and firefighting workers due to this backfire. It is now possible to do it.

In addition, in this firefighting activity, the extinguishing pressure fluid is introduced into the pressure fluid passages 29 and 30 in the fixed valve body 21 and simultaneously with the diffusion injection of the extinguishing pressure fluid by the gland nozzle 17.
0 through the collective jet nozzle 28 to the target flame zone, thereby increasing the effectiveness of initial fire extinguishing activities.

Then, in the opposite direction to the above, the top nozzle 10 is rotated counterclockwise through the covering member 32, and the male thread 7 and the female thread 9 are
The top nozzle 10 moves backward in the axial direction due to the screw engagement with the valve seat 14 and the movable valve body 16 along with the straight spout 13.
is moved backward, the valve seat 14 is separated from the fixed valve body 21 to form a pressure fluid flow gap G, and at the same time the movable valve body 16 is brought into close contact with the fixed valve seat 26, thereby opening the pressure fluid passage of the fixed inner cylinder 8. 12 is communicated with the pressure fluid flow gap G through the pressure fluid delivery port 24 and the valve port 15, thereby allowing the pressure fluid such as fire extinguishing liquid from the pressure fluid feed path 12 to pass through the flow gap G as shown in FIG. The water is ejected forcefully straight forward from the straight spout 13 (spraying distance of about 25 m to 30 m), making it possible to effectively carry out water spray fire extinguishing activities, for example, when extinguishing combustion flames at a fire site.

In addition, in fire extinguishing activities by straight jetting of fire extinguishing pressurized fluid through the straight spout 13 shown in FIG.
The pressure fluid passages 29, 3 of the collective spout 28 in
0 and flows smoothly through the flow gap G formed between the circumferential surface of the fixed valve body 21 and the inner circumferential surface of the movable valve seat 14, where pressure fluid can easily flow, so that the pressure fluid is ejected from the collective spout 28. There is no risk of it happening.

The fluid branching wall 18 in the ground nozzle 17 of the top nozzle 10 is integrally formed with the top nozzle 10 at the rear central part of the elliptical ejection passages 19 and 20 at the rear of the ground nozzle 17, as shown in FIG.

According to this invention, in the early stages of fire extinguishing activities in which extinguishing pressure fluid such as pressure water or fire extinguishing foam powder is injected powerfully from a fire extinguishing nozzle, the pressure hose is passed through the fixed inner cylinder 8 as shown in Fig. 5. The extinguishing pressurized fluid that is pumped to the top nozzle 10 is led out through the pressure fluid outlet 24 to the pressure fluid outlet 27, and the pressure fluid from this outlet 27 is made larger and at a higher pressure than the several gland nozzles 17. It is possible to enlarge the injection forward. This diffusely sprayed extinguishing pressurized fluid is powerfully injected toward the target flaming object at the fire site to exert its extinguishing power, and the diffused sprayed film of the extinguishing pressurized fluid acts as a shielding film for firefighters and others to carry out extinguishing activities. The body of the worker can be safely protected from flame heat and hot smoke gas.

Moreover, near the end of firefighting, for example, as shown in Figure 6, the top nozzle 1
By retracting the movable valve body 16, the movable valve body 16 is brought into close contact with the fixed valve seat 26 of the fixed inner cylinder 8, and the pressure fluid outlet path 27 to the gland nozzle 17 is closed. At the same time, the gap between the fixed valve body 21 and the movable valve seat 14 is G, and the extinguishing pressure fluid pumped from the fixed inner cylinder 8 can be powerfully injected straight forward from the straight spout 13 through the gap G. This straight extinguishing pressurized fluid can be injected toward the target remaining flames at the fire site to reliably extinguish the fire.

In addition, while handling the fire extinguishing nozzle body of this invention,
Or, if the user accidentally falls forward on the ground or a rigid surface during fire extinguishing work, or crashes into a rigid surface such as a concrete wall, the projecting wall 11 of the straight injection port 13 and the front end of the top nozzle 10 Although an impact load is applied to the circumferential wall, the gland nozzle 17 is protected extremely safely without damage or blockage due to crushing pressure.

[Brief explanation of the drawing]

The figures show an embodiment of the fire extinguishing nozzle of this invention. Figure 1 is a vertical sectional front view of the whole, Figure 2 is a vertical sectional front view of the top nozzle, Figure 3 is a side view of the same, and Figure 3 is a vertical sectional front view of the top nozzle. Figure 4 is a front view of the same as above, Figure 5 is a vertical sectional front view showing the state of diffused injection of fire extinguishing pressure fluid from the gland nozzle, and Figure 6 is a vertical view showing the state of straight jetting of fire extinguishing pressure fluid from the straight spout. Fig. 7 is an enlarged vertical sectional view of the gland nozzle section, Fig. 8 is a sectional front view.
The figure is a vertical sectional rear view of the same as above. 8...Fixed inner cylinder, 10...Top nozzle, 11
... Projection wall, 12 ... Fire extinguishing pressure fluid feed line, 13 ...
Straight spout, 14...Valve seat, 15...Valve port, 16
...Movable valve body, 17...Gland nozzle, 21...
... fixed valve body, 23 ... spindle, 26 ... fixed valve seat, 27 ... extinguishing pressure fluid outlet path.

Claims (1)

[Scope of utility model registration request] A projecting wall is provided at the center of the front side of the top nozzle, which is installed in the front part of the fire extinguishing nozzle body so that it can move forward and backward, and a straight spout for the extinguishing pressure fluid is formed within this projecting wall, and a valve seat is provided on the straight spout. , setting a fixed valve body that comes into contact with and separates from the valve seat through a valve port at the rear of the valve seat;
Several ground nozzles are disposed on the outer periphery of the projecting wall of the top nozzle to diffuse and eject extinguishing pressurized fluid, and the fixed valve body that approaches and separates from the valve seat to open and close the valve port is connected to the pressure of the fixed inner cylinder. A fixed valve that is set at the front end of a spindle that is fixed in the axial direction in the fluid feed path, and that opens and closes the outlet path for extinguishing pressure fluid to the gland nozzle using a movable valve body that is integrally provided at the rear of the valve seat. A liquid extinguishing nozzle for fire fighting, characterized in that a seat is set at the front part of the fixed inner cylinder.