JPS6311978Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a nozzle used for firefighting and the like.
Generally, in the event of a fire in a building, if the floor of the building is on the upper floor of the building, the water sprayed to extinguish the fire will cause water damage to the floors below. That is, the method of extinguishing a fire by increasing the amount of water sprayed has the above-mentioned difficulties.

This idea was made in view of this situation, and its purpose was to be able to spray water in a columnar shape, as well as in the form of a mist.
Moreover, it is an object of the present invention to provide a nozzle that can adjust the angle of spread of the spray. In other words, in addition to extinguishing a fire with a column of water, in some cases, an almost umbrella-shaped spray is used to extinguish the fire, and by providing a nozzle that can respond to fires by adjusting the range covered by the spray as appropriate. be. Further, although the above-mentioned nozzles generally have a complicated structure and tend to be troublesome to manufacture, the present invention aims to provide a nozzle having the above-mentioned function, which has a relatively simple structure and is relatively easy to manufacture.

To describe this invention with reference to the drawings, in FIGS. 1 to 6, an outer cylinder 2 having an opening 1 at the tip;
A swirler 6 provided inside the outer cylinder 2 with a swirling chamber 17 separated from the opening 1 and having a flow passage 4 inside the cylinder 3 and a spiral guide 5 on the outside. ; a switching orifice 8 having an annular protrusion 7 provided on the upstream side of the swirler 6 and having a substantially mountain-like cross section; a first slope 16 and a second slope formed on the downstream and upstream sides of the protrusion, respectively; 16a;
Entering and exiting the switching orifice 8 inside and out;
It has a substantially orb-shaped bulge 9 and the flow path 4
control the distribution of

Needle shaft 10: A nozzle characterized by comprising a third slope 18 and a fourth slope 18a formed on the downstream and upstream sides of the bulging portion 9, respectively.

In the figure, 12 is a connecting pipe, 13 is a threaded portion, 14 is an O-ring, and 15 is water.

Further, the needle shaft 10 is formed to be movable in the direction of the arrow A10 and in the opposite direction thereof, and the mechanism thereof, although not shown, moves the needle shaft 10 within the connecting pipe 12 at the upstream portion of the nozzle. Form as you get. These may be formed by screwing together, and as another example, although not shown, they may be moved in the direction of arrow A10 by pulling a trigger-like actuating member provided on the upstream side of the nozzle body. It may also be formed so that it can be moved. In this case, the needle shaft 10 is urged in the opposite direction of arrow A10 by a spring (not shown). Also, although not shown, the water flow inside the nozzle flows through the upstream side of the connecting pipe 12.
It is controlled by a valve not shown. The valve may also be configured to be actuated by the trigger-like actuating member.

Next, the rotor 6 was formed as shown in FIGS. 4 to 6, and was made of a brass alloy as an example. Although three guides 5 are formed as an example, this number may be selected as appropriate.

To describe the operation of this device, first, in the state shown in FIG. Since almost all of the flow path 4 of the swirler 6 is closed, the water 15 passes through the protrusion 7 of the switching orifice 8, curves along the first slope 16 of the orifice 8, and is connected to the outside of the swirler 6. , enters between the outer cylinder 2 of the nozzle, and is then rotated by the guide 5, and in the swirling chamber 17, each guide 5 (the illustrated one is 3 as an example).
The water 15 separated from the main body swirls as a unit, and its centrifugal force causes it to be ejected from the opening 1 in the form of mist. At this time, the flow path 4 inside the swirler 6
Since a gap of about 0.2 mm is formed between the bulge 9 and the bulge 9, a small amount of almost columnar water is ejected, but this does not have a large effect on the spray. The minute gap is necessary to prevent damage to the flow path 4 and the bulging portion 9 from occurring.

Next, the spray angle α in the case shown in FIG. 1 is opened to the greatest extent. Next, as shown in FIG. 2, the needle shaft 10 is slightly pulled in the direction of arrow A10, and the flow path 4 is slightly opened. In this case, water 15 flows into both the flow path 4 and the guide 5. farewell,
Since the water flowing toward the flow path 4 is not given any swirling force and continues straight, the overall swirling force is
It is lower than the case shown in the figure. As a result, the straightness of the water increases, so the angle α of the spray exiting the opening 1 is
It is narrower than the case shown in FIG.

Next, as shown in FIG. 3, when the needle shaft 10 is further pulled in the direction of the arrow A10 to further open the space between the bulging portion 9 and the flow passage 4, the switching orifice 8
The second slope 16a of the needle shaft 10 corresponds to the third slope 18 of the needle shaft 10 to form a water channel that concentrates water in the axial direction, so that most of the water 15 flows through the flow path 4.
, thus forming a columnar shape and being ejected from the opening 1.

As described above, according to this invention, the water 15 can be sprayed, can be emitted in a columnar manner, and the range of spray can be expanded or reduced with a relatively simple structure.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is a partial sectional view of the nozzle, and FIG. 2 shows a state different from that in FIG. 1.
FIG. 3 is a partial sectional view of the nozzle in a different state from FIGS. 1 and 2, FIG. 4 is a perspective view of a swirler installed in the nozzle, and FIG. The side view and FIG. 6 are front views of the rotor. 1...Opening, 2...Outer tube, 3...Cylinder body, 4...
Flow path, 5...Guide, 6...Swirl element, 7...Protrusion, 8...Switching orifice, 9...Bulging portion, 10
...Needle shaft.

Claims (1)

[Scope of utility model registration request] An outer cylinder 2 having an opening 1 at the tip; a flow passage 4 inside the cylinder body 3, which is provided inside the outer cylinder 2 with a swirling chamber 17 separated from the opening 1;
and a swivel 6 having a spiral guide 5 on the outside;
A switching orifice 8 having an annular protrusion 7 provided on the upstream side of the swirler 6 and having a substantially mountain-shaped cross section; a first slope 16 and a second slope formed on the downstream and upstream sides of the protrusion, respectively; 16a; a needle shaft 10 having a substantially orb-shaped bulge 9 that moves in and out of the switching orifice 8, and controlling the flow of the flow path 4; downstream and upstream sides of the bulge 9; A nozzle characterized in that it consists of a third slope 18 and a fourth slope 18a, which are respectively formed.