JP2000084110A - Nozzle for fire hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nozzle for a fire hose whose spouting pressure can be adjusted easily and speedily on the nozzle side without adjusting the spouting pressure on the pump side. SOLUTION: A spray water passage 3 is formed around the circumference of a direct spout water passage 2 of a nozzle body 1, and a spherical valve 6 is attached between the direct spout water passage 2 and a water passage 4 on the water supply side 5. A first flow passage 35 is formed passing through the valve 6 in the diameter direction, and a second flow passage 36, communicating with the first flow passage 35 in the vertical direction, is formed in the radius direction of the valve 6. A spray adjusting member 9 for adjusting the volume of water to be sprayed from the spray water passage 3 is attached to the nozzle body 1. If the position of the first flow passage 35 in the valve 6 is determined so that the water passage 4 on the water supply side 5 communicates with the direct spout water passage 2, the water passage 4 on the water supply side 5 communicates with the spray water passage 3 by way of the first low passage 35 and the second flow passage 36, and water can be sprayed as well as directly spouted. By adjusting the volume of water to be sprayed by the operation of the spray adjusting member 9, the spouting pressure of the direct spout can be adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire hose nozzle attached to the end of a hose connected to a fire engine or a fire hydrant.

[0002]

A fire hose is used by extending it from a fire engine or the like by branching or connecting it. Since the gas may get over or bend on the way, the nozzle attached to the tip of the fire hose may have a large variation in the discharge pressure. The pressure fluctuation is generally about 1.5 to 3 kg / cm ² , but when the fluctuation is excessive, the firefighter may not be able to hold the nozzle.

In such a case, the firefighter adjusts the discharge pressure itself on the pump side while communicating with the pump side by portable radio. However, such an adjustment method is very complicated for a firefighter who is struggling to extinguish a fire, requires manpower on the pump side, and does not provide good responsiveness.

Accordingly, an object of the present invention is to provide a fire hose nozzle that can easily and quickly adjust the discharge pressure on the nozzle side without adjusting the discharge pressure on the pump side.

[0005]

In order to achieve the above-mentioned object, a fire hose nozzle according to the present invention has a spray channel formed on the outer periphery of a direct jet channel of a nozzle body, and the direct jet channel is provided. A spherical valve body is provided between the water supply side and the water supply side, and the valve body has a first flow path diametrically penetrating therethrough and a first flow path vertically communicating with the first flow path. The two flow passages are formed to be branched in the radial direction, and the nozzle main body is provided with a spray adjustment member for adjusting a discharge water amount sprayed from the spray water passage, and the first flow passage of the valve body includes: When the position of the valve body is set so that the water supply side water passage communicates with the direct injection water passage, through the first flow passage and the second flow passage,
The water channel on the water supply side also communicates with the spray water channel, so that the discharge in the spray state can be performed together with the discharge in the direct injection state, and the spray adjusting member is operated to adjust the discharge water amount in the spray state. Thereby, the discharge pressure in the direct injection state can be adjusted.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments. FIG. 1 shows a configuration of an embodiment of a fire hose nozzle of the present invention, in which 1 is a nozzle body, which is composed of a main body portion 11 and a base portion 12, and is joined and integrated by screwing screws 13 and 14, A detent is provided by a locking screw 15. The main body 11 is provided with a direct water jet channel 2 and a spray water channel 3 formed on the outer periphery thereof.
Is provided with a water channel 4 on a water supply side 5, and the direct water channel 2
A spherical valve element 6 operated by a handle 7 is provided between the water pipe 4 and the water passage 4.

A large-diameter hose (for example, 65 mm) 17 is connected to the base 12 of the nozzle body 1 via a connecting member 16, and the large-diameter hose 17 is extended (for example, 60 m) by branching or connecting. Then, it is connected to a hose connection port of a fire engine or a fire hydrant. The tip of the large-diameter hose 17 is connected to a connecting member.
The connecting member 16 is engaged with the engaging step 18 formed on the base of the base 16, and the distal end of the connecting member 16 is screwed with the screws 19, 20.
It is connected to the.

On the other hand, a discharge mouthpiece 10 is attached to the tip of the main body 11 of the nozzle body 1 by screwing screws 21 and 22, and a direct injection port 23 formed therein is connected to the direct injection passage 2.
A plurality of spray discharge ports 24 are arranged at predetermined intervals around the outer periphery of the direct injection port 23 and communicate with the spray channel 3. Also, its discharge base
An annular spray opening communicating with the spray water channel 3 is provided on the outer periphery of 10.
25 is formed so that the gap opening can be freely adjusted by operating the spray adjusting member 9.

The spray adjusting member 9 is movable forward and backward by engaging a female screw 27 formed on the base thereof with a male screw 28 formed on the outer periphery of the main body 11 of the nozzle main body 1. By rotating the spray adjusting member 9, the distance between the circumferential step portion 29 formed in the front end portion and the outer peripheral edge portion 30 of the discharge mouthpiece 10 is adjusted, and the spray opening 25 is adjusted. Can be adjusted, whereby the state of spray can be adjusted appropriately.

That is, when the spray adjusting member 9 is moved to the foremost, the inner portion of the circumferential step portion 29 comes into contact with the ring-shaped seal member 31 attached to the inside of the discharge mouthpiece 10 so that the spray channel is formed. 3 is closed. Then, when it is retracted from that position, the state shown in FIG. 1 is established, and each of the spray discharge ports 24 and the spray openings 25 is opened in a state of communicating with the spray water passage 3, so that the spray state can be discharged. Numeral 32 denotes a non-slip member made of a rubber material fitted to the spray adjusting member 9.

On the other hand, a first passage 35 is provided in the valve body 6 provided between the direct water jet channel 2 and the water channel 4 (see FIGS. 3A and 3B) in a diametrical direction. At the same time, a second flow path 36 vertically communicating with the first flow path 35 is formed in the radial direction. A latching groove 37 is formed in the side of the valve body 6, and a pivot 38 integrated with the handle 7 is attached to the body of the nozzle body 1.
11 is rotatably supported, and the tip of the pivot 38
And by rotating the handle 7,
The valve body 6 is moved between the first position shown in FIG. 1 and the second position shown in FIG.
Can be set to change with the position.

At the first position, the discharge in the spray state for reducing the pressure can be performed when the pressure increases, based on the discharge in the direct injection state. Further, in the second position, it is possible to discharge and close the spray state. The valve body 6 and the main body 11 and the base 12 are connected to the main body 11 and the base.
The seals are sealed by ring-shaped seal members 26, 26 fitted in grooves formed on the respective 12 peripheral walls.

With the above configuration, when performing a normal fire extinguishing operation, the firefighter holds the nozzle body 1 and the like and operates the handle 7 to set the valve body 6 to the first position shown in FIG. Then, the spray adjustment member 9 may be operated to move forward to close the spray opening 25, and discharge may be performed from the discharge base 10 in a direct injection state. In this state, the water channel 4 communicates straight (with substantially the same diameter) with the direct injection water channel 2 of the nozzle body 1 and the direct injection port 23 of the discharge mouthpiece 10 via the first flow path 35 of the valve body 6. Therefore, a large amount of water can be efficiently sprayed (see FIG. 4A).

If the discharge pressure rises abruptly during the discharge in the direct injection state, the spray adjusting member 9 is operated to be retracted, the spray opening 25 is opened, and each spray discharge port 24 is opened.
In addition, it is only necessary to perform the discharge in the spray state from the spray opening 25 (see FIG. 4B), whereby the discharge pressure at the direct injection port 23 can be reduced, and the discharge pressure rises sharply. Can be effectively suppressed.

The degree of the pressure reduction can be easily and promptly adjusted by adjusting the opening degree of the spray opening 25 by operating the spray adjusting member 9, so that good responsiveness can be obtained. Therefore, it is not necessary to contact the pump side of a fire engine, a fire hydrant, or the like, as in the related art. This eliminates the troublesomeness, and the firefighter can concentrate on the fire extinguishing work.

Further, by operating the handle 7, the valve 6 is
When set to the second position shown in FIG. 2, only the spray water passage 3 communicates with the water passage 4 and can discharge in a spray state from each of the spray discharge ports 24 and the spray openings 25 (see FIG. 4C). As described above, the state of the spray can be appropriately adjusted by the spray adjusting member 9.

When the spray adjusting member 9 is operated to move to the foremost position, the spray water channel 3 is closed, and the fire hose nozzle N is closed (FIG. 4).
(D)). In addition, the present invention can be applied regardless of the form of the spraying state.
The present invention can also be applied to a case where only the spray opening 25 is formed without 24.

[0018]

Since the present invention is configured as described above, it has the following effects.

If a sudden increase in the discharge pressure occurs during the discharge in the direct injection state, the firefighter holding the fire hose nozzle N operates the spray adjusting member 9 to simultaneously perform the discharge in the direct injection state. Also, by performing the discharge in the spray state, it is possible to easily and quickly adjust the discharge pressure on the nozzle side, and it is possible to suppress the occurrence of a large reaction due to the fluctuation of the discharge pressure. Therefore, it is not necessary for the firefighter during the fire fighting operation to contact the pump side and instruct the adjustment of the discharge pressure at the pump side, as in the related art. it can.

[Brief description of the drawings]

FIG. 1 is a half sectional view of a fire hose nozzle according to an embodiment of the present invention, in which a valve body is set at a discharge position in a direct injection state.

FIG. 2 is a half cross-sectional view when a valve body is set at a discharge position in the spray state.

3A and 3B are diagrams illustrating an example of a valve body, wherein FIG. 3A is a plan view of the valve body, and FIG. 3B is a cross-sectional view taken along line YY in FIG.

4A and 4B are explanatory diagrams of a discharge mode, wherein FIG. 4A is a direct injection state, FIG. 4B is a direct injection state, and a discharge state is also discharged for pressure reduction under the direct injection state, and FIG. , (D) show the closed state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nozzle main body 2 Direct injection water path 3 Spray water path 4 Water path 5 Water supply side 6 Valve element 9 Spray adjustment member 35 First flow path 36 Second flow path

Claims (1)

[Claims] 1. A spray channel is formed on the outer periphery of a direct jet channel of a nozzle body, and a spherical valve element is provided between the direct jet channel and a water channel on a water supply side. A first flow path is provided in the diametrical direction, and a second flow path perpendicular to the first flow path is radially branched and formed. The nozzle body is sprayed from the spray water path. A spray adjusting member for adjusting the discharge water amount is provided, and the position of the valve body is set so that the first flow path of the valve body communicates the water supply side water path with the direct injection water path. Through the first flow path and the second flow path, the water supply-side water passage also communicates with the spray water passage, so that the discharge in the spray state can be performed together with the discharge in the direct injection state. By adjusting the amount of water discharged in the spray state, the discharge pressure in the direct injection state can be adjusted. A nozzle for a fire hose, characterized in that the nozzle is configured to be fired.