JP2746141B2 - Variable spray nozzle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable spray nozzle to be attached to the tip of a fire hose or the like, and more particularly, to a direct spraying water discharge pattern when a fire point is a long distance. The present invention relates to a variable spray nozzle capable of forming a water discharge pattern in a diffusion state in a short distance.

[0002]

2. Description of the Related Art Conventionally, as this kind of variable spray nozzle, there is one as disclosed in Japanese Patent Application Laid-Open No. 4-156682, which will be described with reference to FIG. The variable spray nozzle a is provided with a cylinder portion 52 having a piston 51 on a side of the nozzle body 56, and connects an upper portion of the cylinder portion 52 and an upper portion of the outer cylinder 53 to each other.
The central part and the lower part of 2 are connected to the inner cylinder 54, and the bellows body 55 expands and contracts as indicated by an arrow by hydraulic pressure, so that the outer cylinder 53 is driven.

The variable spray nozzle a operates as follows. That is, when the hydraulic pressure in the nozzle body 56 is reduced, the respective hydraulic pressures proportional to the hydraulic pressure are applied to the chamber 5.
7 and 58 to drive the piston 51 downward. Then, the deflector 59 and the distal end portion of the outer cylinder 53 are provided close to each other, so that a water discharge pattern in a diffusion state suitable for discharging water to a short-range fire point can be formed. When the hydraulic pressure in the nozzle body 56 is increased, respective hydraulic pressures proportional to the hydraulic pressure are introduced into the chambers 57 and 58, and the piston 51 is driven upward. Then, the deflector 59 and the distal end of the outer cylinder 53 move away from each other, so that a direct water discharge pattern suitable for discharging water to a long-distance fire point can be formed.

[0004]

However, the operation of such a variable spray nozzle a is such that the piston 51 of the cylinder portion 52 moves with respect to the center line of the outer cylinder 53 and the inner cylinder 54 which are intruded and retracted.
If the center line of the height is slightly deviated, there is a drawback that a twisting occurs and it becomes difficult to move. This shift is
Since it must not be shifted not only in the horizontal direction but also in the vertical direction, the assembly accuracy is extremely severe and difficult. In addition, since the cylinder portion 52 is attached to the side of the nozzle body 56, the cylinder portion 52 may be hindered during fire extinguishing activities and may be caught.

Accordingly, the present invention has been made in view of the above situation, and an object of the present invention is to allow the outer tube and the inner tube to be inserted without worrying about the assembling accuracy, resulting in twisting. It can be driven out and out without any trouble, and the slim shape without mounting the cylinder part on the side of the nozzle body as in the past makes it disturbing during handling, and it may be hooked and displaced and damaged. There is no variable spray nozzle to provide.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a hydraulically driven variable spray nozzle capable of changing a spray water discharge angle, which can be freely retracted by injecting an oil liquid. A driven outer cylinder, and an inner cylinder fitted and inserted into the outer cylinder and having a deflector disposed close to the inner wall at the distal end portion .
The oil liquid supply section that can supply oil liquid to the wall is long.
While forming two places along the hand direction, these two
Supply the oil liquid to one of the oil liquid supply units
In the state, the other oil liquid can be discharged
It is an object of the present invention to provide a variable spray nozzle.

[0007] Oil inflow / outflow to / from the two oil supply units
A port is provided in each of the inner cylinders,
An oil flow passage communicating the supply section and the oil liquid outflow inlet with the inner cylinder;
It is also characterized by being formed in.

[0008]

The operation of the variable spray nozzle A according to claim 1 will be described with reference to FIGS. 1 to 3 based on the structure of the present invention. When the oil liquid is press-fitted from the oil liquid outlet 5a attached to the outer wall of the inner cylinder 2, the oil flows from the long oil flow passage 6a into the first short oil flow passage 6b, and is located on the upper side in the figure.
The oil liquid is supplied to the oil liquid supply section 6e.
Is driven to protrude the outer cylinder 1 with respect to the inner cylinder 2. Therefore, the distance between the tip of the outer cylinder 1 and the deflector 4 provided close to the inner wall of the inner cylinder 2 is increased as shown in FIG. A suitable direct water discharge pattern can be formed. At this time, position
The oil liquid in the oil liquid supply section 6f flows out from the second oil liquid short flow passage 6c and flows out to an oil reservoir (not shown) through the oil liquid outflow port 5b.

When the oil is press-fitted from the oil outflow port 5b attached to the outer wall of the inner cylinder 2, the oil flows from the long oil flow passage 6a into the second short oil flow passage 6c .
The oil liquid is supplied to the oil liquid supply section 6f located on the lower side,
The outer cylinder 1 is driven downward by expanding the oil liquid supply section 6f . Therefore, the tip of the outer cylinder 1 and the inner cylinder 2
As shown in FIG. 1, the distance from the deflector 4 provided close to the inner wall becomes short, and a water discharge pattern in a diffused state suitable when the fire point is a short distance can be formed. At this time, in FIG.
The oil liquid in the oil liquid supply unit 6e located on the upper side flows out from the first oil liquid short flow passage 6b, and flows out to an oil reservoir (not shown) through the oil liquid outlet 5a.

Then, as described above, the two oil liquid supply units
The oil outflow port for the
Can be connected to the oil liquid outflow port.
There is no need to make the service flexible.

Further, when the oil liquid is press-fitted from the oil liquid outlet 5d attached to the outer wall of the outer cylinder 11, the oil liquid flows into the oil liquid passage 6e, and the outer cylinder 11 is driven downward.
Therefore, as shown in FIG. 5, the distance between the distal end portion of the outer cylinder 11 and the deflector 13 provided near the inner wall of the inner cylinder 12 is short, and a water discharge pattern in a diffusion state suitable for a short fire point is obtained. Can be formed. At this time, on the contrary, the oil liquid flows into the oil liquid passage 6d.
And flows out to an oil reservoir (not shown) through the oil liquid outflow port 5c.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a variable spray nozzle according to an embodiment of the present invention.

FIG. 1 to FIG. 4 show a variable spray nozzle A according to a first embodiment of the present invention. FIG. 1 shows a central vertical half of the variable spray nozzle at a position in a diffused water discharge pattern. FIG. 2 is a cross-sectional view, FIG. 2 is a vertical half sectional view of the center of the variable spray nozzle at the position of the direct spray pattern, FIG. FIG. 1 shows a vertical half cross-sectional view, and is mainly composed of an outer cylinder 1 and an inner cylinder 2.

The outer cylinder 1 is, as shown in FIGS.
It is a vertically long hollow cylinder whose tip part is formed in a divergent shape and is driven so as to be able to come and go by changing the flow of the oil liquid. An O-ring 3 is provided on the inner wall at the base end to promote smooth driving and seal the oil liquid.

The inner cylinder 2 is, as shown in FIGS.
This is a vertically long hollow cylinder having a distal end formed in a divergent shape like the outer cylinder 1. Then, while being inserted into the outer cylinder 1, a deflector 4 is arranged near the inner wall of the distal end portion, and oil liquid outflow ports 5 a, 5 b are attached to the outside of the insertion section with the outer cylinder 1. An oil liquid flow passage 6 through which the oil liquid is circulated by operating the oil liquid outflow ports 5a and 5b is provided on the inner wall. By attaching the oil liquid outflow ports 5a, 5b to the inner cylinder 2, even if the outer cylinder 1 is driven to be able to move in and out, the outer cylinder 1 is not moved by it, so it is connected to the oil liquid outflow ports 5a, 5b. There is no need to make the oil supply hose (not shown) flexible. Therefore, when it is attached to the inner cylinder 2, fixed piping can be performed. Further, the provision of the oil liquid flow passage 6 on the inner wall of the inner cylinder 2 eliminates the need to separately mount the cylinder portion 52 outside the nozzle body 56 unlike the conventional variable spray nozzle a shown in FIG. In addition, the appearance becomes smart, and the assembly accuracy is not set severely. Therefore, there is no hindrance at the time of the water discharging work, and there is no possibility of being caught and damaged. Further, three concave portions 7 are provided on the outer wall of the inner cylinder 2 and an O-ring 8 is provided therein so that the outer cylinder 1 and the inner cylinder 2 can be smoothly and freely driven into and out of the cylinder without leaking oil. It is.

As shown in FIG. 4, the variable spray nozzle A according to the present invention has the inner cylinder 2 inserted into the outer cylinder 1 and is firmly attached by the lock ring 9 while the deflector 4 is secured to the inner cylinder by bolts 18. It is mounted and fixed in 2. FIG. 1 shows a state in which the ignition point is at a short distance, and the distance between the distal end of the outer cylinder 1 and the deflector 4 provided near the inner wall of the inner cylinder 2 is short. is there. With this setting, the fire extinguishing liquid collides with the deflector 4 as indicated by the arrow, and the fire extinguishing liquid spreads out in a diffuse manner and is discharged over a wide area. On the other hand, when the fire point is a long distance, a direct water discharge pattern must be formed. To this end, it is necessary to drive the outer cylinder 1 upward to increase the distance between the distal end of the outer cylinder 1 and the deflector 4 provided near the inner wall of the inner cylinder 2, and the operation will be described below. FIG. 3 is a sectional view taken along a line aa in FIG. 2. First, an oil liquid is supplied from an oil liquid supply hose (not shown) to an oil liquid outflow / inlet port 5a, and as shown in FIG. Pours into the one oil liquid short flow passage 6b and is located on the upper side in the figure.
The oil liquid is supplied to the oil liquid supply section 6e,
By expanding e, the outer cylinder 1 is pushed up, and the outer cylinder 1 is driven upward as shown in FIG. Therefore, by providing the flowing water space 10 with the deflector 4 and the distal end portion of the outer cylinder 1 separated from each other, the fire extinguishing liquid is not affected by the deflector 4 and the fire extinguishing liquid is discharged from the entire water discharge port 14 so that the fire extinguishing liquid is directly exposed The water discharge pattern is formed.

Further, in order to form the water discharge pattern in the diffused state again, the oil liquid flows from the second oil liquid short flow path 6c into the oil liquid long flow path 6a, and the oil liquid located on the lower side in the drawing
The oil liquid is supplied to the supply section 6f, and the oil liquid supply section 6f is pressed.
By expanding the outer cylinder , the outer cylinder 1 is driven downward. The contents described above are for the two-stage water discharge pattern of the diffusion state and the direct irradiation state. However, the outer cylinder 1 that appears and disappears by adjusting the pressure by the oil liquid outflow ports 5a and 5b is stopped at an appropriate position, and all the water discharge patterns It is also possible to form By the way, the reason why the oil liquid flow passage 6 is provided on the inner wall even at the cost of the thickness of the inner cylinder 2 is that the cylinder portion 52 is provided outside the nozzle body 56 in the variable spray nozzle a as in the related art. Therefore, the assembling accuracy must be set severely, the frequency of breakage is high, and the trouble of having to handle carefully even in an emergency such as a fire is overcome. Further, oil liquid outflow inlets 5a, 5b are provided outside the fitting portion of the inner cylinder 2 with the outer cylinder 1.
The reason why is attached is that fixed piping can be performed without making the oil liquid supply hose (not shown) connected to the oil liquid outflow ports 5a and 5b flexible.

FIG. 5 to FIG. 7 show a variable spray nozzle B according to a second embodiment of the present invention. FIG. 5 shows a central vertical half section of the variable spray nozzle at the position in the diffused water discharge pattern. FIG. 6 and FIG. 6 are central longitudinal half sectional views of the variable spray nozzle at the position in the direct spray pattern, and FIG.
FIG. 3B is a cross-sectional view, and is mainly composed of an outer cylinder 11 and an inner cylinder 12.

As shown in FIGS. 5 and 6, the outer cylinder 11 has a distal end formed in a divergent shape, and has an oil liquid outflow port 5c, 5
is attached to d, oil liquid inlet and outlet opening 5c, a hydraulic fluid supply portion 6 e supplying hydraulic fluid by the operation of 5d, the 6f provided,
Further, it is a vertically long hollow cylinder that is driven so as to be able to come and go by changing the flow of the oil liquid. By attaching the oil liquid outflow ports 5c, 5d to the outer cylinder 11, the oil liquid outflow ports 5c, 5d
Since the oil supply hose (not shown) connected to d must be flexible, a fixed pipe cannot be formed. However, this is superior to the conventional variable spray nozzle a in that no assembling accuracy is required as in the first embodiment. As in the first embodiment, in order to facilitate the outer cylinder 11 and the inner cylinder 12 to smoothly and freely drive without leaking the oil liquid, the oil liquid outlet 5
The O-ring 15 is provided below d.

As shown in FIGS. 5 and 6, the inner cylinder 2 is fitted into the outer cylinder 11 and has a deflector 13 disposed near the inner wall at the distal end. And outer cylinder 11
Are provided with three concave portions 16 on the inner wall so that the O-ring 17 can be smoothly driven in and out.
FIG. 7 is a cross-sectional view taken along the line bb in FIG. 5, and a deflector 13 that determines the water discharge state is fixed to the upper portion by bolts 18.

That is, in the second embodiment, the oil
By installing the entrances 5c and 5d, the oil
Directly connecting the ports 5c and 5d with the oil supply units 6e and 6f
Therefore, the oil supply units 6e and 6
There is no need to form the oil liquid flow passage 6 to f, and there is an advantage that the thickness of the inner cylinder 12 can be widened and the efficiency is good. However, the oil outflow ports 5c, 5d
Is attached, the hydraulic adjustment hose (not shown) connected to the oil liquid outflow ports 5c and 5d must be made flexible by the projection and retraction of the outer cylinder 11, and a little inconvenience remains. However, the second embodiment is sufficiently superior to the related art, as compared with the case where the accuracy of assembly must be considered as in the related art.

Therefore, in the second embodiment as well, although it is better than the conventional variable spray nozzle a, the oil liquid flows through the inner wall until the thickness of the inner cylinder 12 is sacrificed as in the first embodiment. The reason for providing the road 6 is that in a severe situation such as a fire scene, it is necessary to minimize the number of movable parts to minimize damage.

[0023]

As is clear from the above description, the following effects are obtained. By using the variable spray nozzle according to the first aspect, there is no need to separately provide a cylinder portion outside the nozzle body, so that it is not necessary to give more attention to assembly accuracy than in the past, and the outer cylinder can be easily retracted and retracted. It becomes. Therefore, the number of failures also decreases, and there is no interruption during the operation. Furthermore, since the oil liquid outflow port attached to the inner cylinder is fixed without moving, the oil liquid adjusting hose connected to the oil liquid outflow port does not need to be flexible, and the movable parts are kept to a minimum. Can be.

By using the variable spray nozzle according to the second aspect of the present invention, there is no need to provide a separate cylinder outside the nozzle body. The tube can be moved freely. Therefore, the number of failures also decreases, and there is no interruption during the operation. Further, since the oil flow passage is provided in the outer cylinder, the diameter of the inner cylinder can be increased, so that the amount of the fire extinguishing liquid can be increased.

[Brief description of the drawings]

FIG. 1 is a central vertical half sectional view of a variable spray nozzle according to a first embodiment of the present invention at a position in a diffused water discharge pattern.

FIG. 2 is a central vertical half sectional view of a variable spray nozzle according to a first embodiment of the present invention at a position in a direct water discharge pattern.

FIG. 3 is a sectional view taken along line aa in FIG. 2;

FIG. 4 is an exploded central longitudinal sectional view of the present invention.

FIG. 5 is a central vertical half sectional view of a variable spray nozzle according to a second embodiment of the present invention at a position in a diffused water discharge pattern.

FIG. 6 is a central vertical half sectional view of a variable spray nozzle according to a second embodiment of the present invention at a position in a direct water discharge pattern.

FIG. 7 is a sectional view taken along line bb in FIG. 5;

FIG. 8 is a cutaway longitudinal sectional view of a main part of a conventional variable spray nozzle.

[Explanation of symbols]

A variable spray nozzle B variable spray nozzle 1 outer cylinder 2 inner cylinder 3 O-ring 4 deflector 5a, 5b, 5c, 5d oil liquid outflow port 6 oil liquid flow path 6a oil liquid long flow path 6b first oil liquid short flow path 6c Second oil liquid short flow passages 6e, 6f
Oil liquid supply unit 7 recess 8 O-ring 9 lock ring 10 running water space 11 outer tube 12 inner tube 13 deflector 14 water outlet 15 O-ring 16 recess 17 O-ring 18 bolt 51 piston 52 cylinder unit 53 outer tube 54 inner tube 55 bellows 56 Nozzle body 57 Chamber 58 Chamber 59 Deflector

Claims (2)

(57) [Claims] 1. A variable spray nozzle of a hydraulic drive type capable of changing a spray water discharge angle, comprising: an outer cylinder driven so as to be retractable by press-fitting an oil liquid; And an inner cylinder in which a deflector is disposed in proximity to the inner wall of the distal end portion, and an outer wall of the inner cylinder and an outer cylinder
Liquid supply unit that can supply oil liquid to the inner wall of
Are formed at two places along the longitudinal direction.
Supply oil to one of the two oil supply units
So that the other oil can be drained
A variable spray nozzle characterized by comprising . 2. An oil liquid outflow to the two oil liquid supply units.
An inlet is provided in each of the inner cylinders,
An oil liquid flow passage communicating the supply section with the oil liquid outflow inlet
The variable spray nozzle according to claim 1, which is formed in a cylinder .