JP2819425B2 - Fire extinguishing nozzle - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire extinguishing nozzle capable of switching a water discharge state of a fire extinguishing liquid between a rod shape and a spray.

2. Description of the Related Art As a fire-extinguishing nozzle capable of switching a water discharge state between a rod shape and a spray, a needle body is provided in the nozzle, and the needle body is switched between a rod shape and a spray by moving the needle body closer to or farther from the water discharge port. No. -28196, No. 58-8256
No. 5-10792) or a trumpet-shaped or T-shaped core at the outlet of the nozzle and a deflector, and switching between the rod and spray by moving the core back and forth (Japanese Utility Model Publication No. 53-10792) And a piston or ball cock provided in the nozzle, and the fire extinguishing liquid is switched between a rod-shaped water discharge port and a spray water discharge port by moving or rotating the piston or ball cock (Japanese Patent Publication No. 47-78). 19
No. 949 and Japanese Utility Model Publication No. 58-1329).

Problems to be Solved by the Invention These conventional rod-shaped spray switching type fire-extinguishing nozzles must be provided in the nozzle or at the water outlet thereof so that a needle body, a core, a piston, a ball cock, or the like can be moved or rotated. And its structure becomes complicated,
The operation is also troublesome. Further, when water spraying is performed by switching to spraying, the fire extinguishing liquid is sprayed as a whole in a radial shape, but the center side thereof becomes a rod-like shape.

For this reason, a portion (anhydrous portion) through which the fire extinguishing liquid does not pass is formed between the center side and the outside, so that water cannot be sprayed evenly over a wide area.

In view of the above circumstances, an object of the present invention is to provide a fire-extinguishing nozzle that requires a small number of parts, has a simple structure, is easy to assemble, and can spray and discharge water uniformly from the center to the outside when spraying and discharging water. .

Means for Solving the Problems According to the present invention, the inside of a main body cylinder is divided into a primary side to which a fire extinguishing liquid is supplied by a partition and a secondary side to discharge the fire extinguishing liquid, and a secondary end of the main body cylinder. And a deflector is provided on the outer end wall on the secondary side, a first water passage hole is provided on the primary side wall of the main body cylinder, and a deflector is provided on the secondary side wall of the main body cylinder from the partition wall side. Spiral hole between and second
And a switching cylinder is provided on the main body cylinder so as to be movable in a watertight manner, and a second communication port is provided between the main cylinder and the switching cylinder from the base end side of the first water communication hole. A first water passage having a length reaching the distal end side of the water hole, and a partition plate having a width shorter than the length of the second water hole from the first water passage provided through the first water passage and opening to the front end of the switching cylinder. The above object is achieved by providing an annular second water passage.

Action When the switching cylinder is slid to position the partition wall downstream of the second water passage hole, the fire extinguishing liquid in the primary flow path of the main cylinder becomes the first fire extinguishing liquid.
Into the first water passage furnace through the water passage hole, and from there through the spiral hole and the second water passage hole to the secondary side flow path of the main body cylinder, and is discharged from the nozzle in the form of a rod. .

Next, when the switching cylinder is slid to position the partition wall above the second water passage hole, the fire extinguishing liquid in the flow path on the primary side of the main body cylinder passes through the first water passage hole. A part of the water flows into the first water passage furnace, and a part of the water is sprayed from the nozzle in a swirling flow through the spiral hole, and the other fire extinguishing liquid is passed through the second water passage through the second water passage. Through the deflector and sprayed.

Further, when the switching cylinder is slid to position the partition wall on the partition wall, the fire extinguishing liquid in the primary flow path of the main body cylinder enters the first water passage through the first water passage hole. Does not flow out to the secondary flow path.

An embodiment of the present invention will be described with reference to the accompanying drawings, wherein the same reference numerals have the same names and the same functions.

A deflector 16 is attached to the tip of the cylindrical or square tubular body 1.
In the center of the deflector 16, a water outlet 14 constituting the nozzle unit 30 is provided so as to penetrate therethrough. Main body cylinder 1
A second through-hole 19, a spiral hole 18, and a first water-through hole 17 are formed in the upstream of the deflector 16 in order,
Between the first water hole 17 and the spiral 18, the main body tube 1
A partition 11 is provided for partitioning the inside into a primary channel and a secondary channel. The spiral hole 18 is formed in the secondary passage 13 having a circular cross section.
And the diameter a thereof is the first and second diameters.
Are formed smaller than the diameter A of the water passage holes 17 and 19. The number and diameter a of the spiral holes 18 are appropriately selected as needed. The first and second water holes 17 and 19 are directed to the centers of the flow paths 12 and 13 as shown in FIG. Since the outer diameter of the main body cylinder 1 at the distal end is smaller than that at the base end, the outer peripheral surface of the main cylinder 1 is stepped. A switching cylinder 2 is slidably fitted outside the main body cylinder 1.

The distal end 2a of the switching cylinder 2 abuts against the deflector 16 and has a proximal end.
The inner surface of 2b is in contact with the outer peripheral surface 1a on the base end side of the main body cylinder 1.
A partition wall 21 having a width C smaller than the diameter A of the second water passage hole 19 at an interval m between the inner surfaces of the base end 2b side and the distal end 2a side of the switching cylinder 2;
The first water passage 25 is formed by protruding the 22, and O-rings 23, 24 are provided at the ends of the partition walls 21, 22. This interval m
Is formed equal to the length M from the upstream hole wall of the first water hole 17 to the downstream hole wall of the second water hole 19. A second water passage communicating with the deflector 16 is provided downstream of the partition wall 22.
26 are formed.

Next, the operation of this embodiment will be described. At the time of fire extinguishing work, for example, as shown in FIG.
The fire extinguishing nozzle N housed in the container is taken out and the cock 31 for water discharge control is opened. At this time, since the partition wall 22 of the switching cylinder 2 is located at the position of the partition wall 11 as shown in FIG. 1, the fire extinguishing liquid W in the primary side flow path 12 passes through the first water passage hole 17 and the first Flows into the water passage 25 of.

However, the flow of water to the secondary flow path 13 is prevented by the action of the partition wall 22 and the O-ring 24, and the water discharge is stopped.
When spraying and discharging water, the switching cylinder 2 is slid and the partition wall 22 is positioned directly above the second water hole 19 as shown in FIG.
At this time, since the mutually opposite pressures of the fire extinguishing liquid W in the first water passage 25 are applied to the partition wall 21 and the partition wall 22, the switching cylinder 2 can be slid with a small force. In this state, the fire extinguishing liquid W in the primary flow path 12 passes through the first water flow path 25 from the first water flow hole 17 and a part thereof passes through the spiral hole 18 so as to pass through the secondary flow path. 13 and the other 19
And enters the secondary flow path 13 and the second water passage 26. Then, since the fire extinguishing liquid W passing through the spiral hole 18 hardly generates pressure in front of the water outlet 14, the flow velocity in the eccentric hole 18 increases, and a strong rotational force is given.

Therefore, the fire extinguishing liquid W forms a swirling flow, and when the water is discharged from the water discharge port 14, the liquid W is sprayed and diffused.

The fire extinguishing liquid W passing through the second water passage 26 is deflector
Sprayed and diffused by 16. As a result, the fire extinguishing liquid is spray-spread in the front part, so that a uniform water distribution can be obtained.

When performing the rod-shaped water discharge, the switching cylinder 2 is further slid in the direction of arrow A2 to separate the partition 21 from the first water hole as shown in FIG.
17 and the partition wall 22 is connected to the second water hole.
It is located downstream of 19. In this state, the fire extinguishing liquid W in the primary flow path 1 passes through the first water passage 17 and enters the first water passage 25, and thereafter, the spiral hole 18 and the second water passage 19
Then, the water flows into the secondary side flow path 26 and is discharged from the water discharge port 14 while being pressurized by the nozzle unit 30.

At this time, since a high pressure is generated in front of the nozzle portion 30, ie, the water outlet 14, the flow rate of the fire extinguishing liquid W passing through the spiral hole 18 does not increase. Therefore, the rotation of the liquid W does not occur in the secondary flow path 13, so that the water W is discharged from the water discharge port 14 in the form of a rod without a swirling flow.

The embodiment of the present invention is not limited to the above. For example, instead of moving the switching cylinder forward and backward by sliding, the base end side of the switching cylinder is screwed to the main body cylinder and moved forward and backward by rotation. Alternatively, the holes 17, 18, and 19 may be long holes.

In the above embodiment, , But instead, May be switched in this order. In this case, a third partition wall is provided on the inner wall near the base end of the switching cylinder 2 at least by the length of the first water passage hole 17 from the partition wall 21, and when the water discharge is stopped, the third partition wall is moved through the first wall. What is necessary is just to locate between the water hole 17 and the spiral hole 18 and stop the water discharge by the partition wall 21 and the third partition wall.

Thereby, the water discharge is switched from the rod shape to the spray by sliding the switching cylinder 2 backward.

Furthermore, instead of fixing the main body cylinder and sliding the switching cylinder, the switching cylinder may be fixed and the main body cylinder may be slid to relatively displace the two.

Effects of the Invention Since the fire extinguishing nozzle according to the present invention is configured as described above, when the switching cylinder is moved to position the partition wall just above the second water passage hole, the fire extinguishing nozzle in the primary side flow path is extinguished. The liquid enters the first water passage through the first water hole, and a part of the liquid is spray-dispersed from the nozzle while forming a swirling flow through the spiral hole.

Further, other fire extinguishing liquid passes through the second water passage hole, and a part of the liquid enters the secondary flow path and is mixed with the swirling fire extinguishing liquid to be sprayed and discharged from the nozzle. The water passes through the second water passage to the deflector and is sprayed and discharged by the deflector.

As described above, since all the fire extinguishing liquid passing through the primary flow path is sprayed and discharged, a uniform water distribution can be obtained.
Further, unlike the conventional example, there is no need to movably provide a needle, a core, a piston or the like in the main body cylinder, so that the structure is simple and the assembly and operation are easy.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention and shows a state in which water discharge is stopped, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a sectional view taken along line III-III of FIG. FIG. 4 is a longitudinal sectional view showing a use state different from that of FIG. 1, showing a spray water discharge state, and FIG. 5 is a longitudinal sectional view showing a use state different from FIG. 1, showing a rod-like water discharge state. FIG. 6 is a plan view showing a fire extinguishing nozzle accommodated in a fire hydrant box. DESCRIPTION OF SYMBOLS 1 ... Main body cylinder 2 ... Switching cylinder 11 ... Partition wall 16 ... Deflector 17 ... First water passage hole 18 ... Spiral hole 19 ... Second water passage hole 21 ... Partition wall 22 ... Partition wall

Claims (2)

(57) [Claims] An inside of a main body cylinder is partitioned by a partition into a primary side to which a fire extinguishing liquid is supplied and a secondary side to discharge a fire extinguishing liquid, and a water outlet is provided at a tip of a secondary side of the main body cylinder. At the same time, a deflector is provided on the outer wall on the distal end side of the secondary side, a first water passage hole is provided on the primary side wall of the main body cylinder, and a spiral hole and a second hole are provided between the deflector from the partition wall side of the secondary side wall of the main body cylinder. 2
And a switching cylinder is provided on the main body cylinder so as to be movable in a watertight manner, and a second communication port is provided between the main cylinder and the switching cylinder from the base end side of the first water communication hole. A first water passage having a length reaching the distal end side of the water hole, and a partition plate having a width shorter than the length of the second water hole from the first water passage provided through the first water passage and opening to the front end of the switching cylinder. A fire-extinguishing nozzle provided with an annular second water passage. 2. The fire extinguishing nozzle according to claim 1, wherein the diameter of the spiral hole is smaller than that of the second water passage hole.