JPH0543807Y2 - - Google Patents

Description

[Detailed explanation of the idea] "Industrial application field" The present invention relates to a fire sprinkler.

"Prior Art" Conventionally, it has been widely practiced to automatically sprinkle water at the site of a fire when a fire detector detects a fire to extinguish the fire.

By the way, looking at large fires in the past, even though the sprinklers at the site of the fire were activated, the fire spread and caused deaths in other rooms, and in many cases the building was completely destroyed. One of the reasons for this is that when the flames are strong at the scene of the fire, the flames and smoke travel through the ceiling, gain momentum, and rapidly spread to other areas. Ta.

Conventional fire sprinklers generally spray water while rotating or spray water radially like a shower.

``Problem that the invention seeks to solve'' However, this kind of water sprinkler structure is aimed at directly extinguishing fires, and is not suitable for applications where, for example, the attic is flooded with water to prevent the spread of fire. It was hot.

The object of the present invention is to provide a sprinkler suitable for such uses.

"Means for Solving the Problem" In order to achieve this objective, the sprinkler of the present invention has a plurality of elongated injection ports arranged circumferentially on the peripheral wall of a bottomed cylindrical body. They are provided at intervals, and both end surfaces of each injection port are vertical surfaces parallel to the tangent to the outer peripheral surface of the cylindrical body, and both inner ends thereof are sharpened into a V-shape.

``Operation'' When water is fed into the cylindrical vessel body, the plurality of injection ports are elongated in the circumferential direction, so water is sprayed flatly from each injection port. Both end surfaces of this nozzle are vertical planes parallel to the tangent to the outer circumferential surface of the cylindrical body, and both inner ends thereof are sharp in a V-shape, so the water jetted from each nozzle flows from both ends. Spread over a wide area.

"Embodiment" An embodiment of the present invention will be described below in detail based on the drawings.

FIGS. 1 and 2 show an installation example in which a sprinkler 1 according to the present invention is vertically attached to the tip of a fire extinguishing water pipe 2 installed horizontally under the ceiling. This sprinkler 1 consists of a bottomed cylindrical body 3 and a nipple 4 for connecting it with piping. The nipple 4 has a male thread 5 on the outer peripheral surface of its small diameter portion 4a, and a female thread 6 on the inner peripheral surface of its large diameter portion 4b.

Then, the female thread 6 of this nipple 4 is screwed into the male thread 7 provided at the upper end of the outer peripheral surface of the cylindrical body 3, and the male thread 5 is screwed into the elbow 8 at the tip of the water pipe 2.
The cylindrical body 3 is attached to the lower end of the elbow 8 by screwing it into a female thread 9 provided in the elbow 8. Furthermore, the part where the sprinkler 1 is attached in this way is attached to the beam 11 in the ceiling using the support 10.
It is supported as follows.

That is, the support tool 10 has a pair of brackets 14, each of which has an upper end 14a bent in an inverted L shape, at both ends of a rectangular support plate 13 provided with a fitting hole 12 that fits into the cylindrical body 3. It is a structure that protrudes upward. Then, the cylindrical body 3 is fitted into the fitting hole 12 of this support 10, and the upper end portion 1 of both brackets 14 is fitted.
4a is screwed to the lower surface of the beam 11, and the support plate 13 supports the lower end of the nipple 4 from below.

The cylindrical body 3 has a lower end (bottom 3
b), four jet ports 15 elongated in the circumferential direction are bored at predetermined intervals (a phase difference of 90 degrees). As shown in FIG. 3, each injection port 15 is formed by cutting the peripheral wall portion 3a long and thin along a line II parallel to the tangent to the outer peripheral surface thereof and horizontally along the upper surface of the bottom portion 3b. Both end surfaces 15 of the injection port 15
a is a vertical plane along line I-I, and both inner ends 15b thereof are sharp in a V-shape.

FIG. 4 shows an example of piping to the fire extinguishing water pipe 2 supported by the beam 11 in the ceiling as described above. This water pipe 2 is connected to a water pipe 18 for supplying drinking water via a water supply pipe 17 for fire extinguishing, which is piped through the ceiling 16 above and below.
is connected to. The fire extinguishing water supply pipe 17 is provided with an automatic valve 19 that opens automatically when a fire is detected, etc., a test faucet 20, and a covered manual valve 21 for testing, and the bypass 22 is further provided with a covered manual valve 23 for emergency water supply. is provided. Further, the water pipe 18 for supplying drinking water is provided with an automatic valve 24 that automatically closes when a fire is detected.

In such a structure, when the automatic valve 19 opens upon detection of a fire, tap water flows into the fire extinguishing water supply pipe 17.
Water is supplied into the cylindrical body 3 of the sprinkler 1 through the fire extinguishing water pipe 2, and its four injection ports 15
is injected from. The injection is made flat because the injection port 15 is elongated in the circumferential direction of the cylinder body 3, and both end surfaces 15a of the injection port 15 are vertical planes parallel to the tangent to the outer peripheral surface of the cylinder body 3. Both inner ends 1
5b has a sharp V-shape, so that the water spreads outward along both end surfaces 15a over a wide area, and the attic area is immediately flooded over a wide area with water.

In the experiment, the outer diameter (diameter) of the cylindrical body 3 was set to 50 mm.
The thickness of the top and bottom of the injection port 15 is 1 mm, and both inner ends 15
When tap water of 1.5 Kg/cm was supplied with the distance between the two end surfaces 15a being 17 mm and the distance between the outer ends of both end surfaces 15a being 25 mm, water could be sprayed over a circumference of approximately 7 m square.

In addition, although the sprinkler 1 was installed in the ceiling in the above-mentioned example, it goes without saying that the position is not limited to this. Further, the number of injection ports 15 can also be arbitrarily selected.

``Effect of the invention'' According to the sprinkler of this invention, water can be sprayed flatly and over a wide range from the plurality of elongated injection ports in the circumferential direction of the cylindrical body, so it is useful for flooding the attic etc. to prevent the spread of fire. suitable.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an embodiment of the present invention in use, Fig. 2 is a partially cutaway side view thereof, and Fig. 3 is a perspective view of an embodiment of the present invention in use.
The sectional view taken along the line A-A in the figure, and FIG. 4 is a side view of a piping example. 1... Sprinkler, 3... Cylindrical vessel body, 3a
...Peripheral wall of cylindrical body, 15...Injection port, 15a...
...End face of the injection port, 15b...Inner end of the injection port.

Claims (1)

[Scope of utility model registration request] A plurality of elongated injection ports are provided at regular intervals in the circumferential direction on the peripheral wall of the bottomed cylindrical body, and both end surfaces of each injection port are parallel to the tangent to the outer peripheral surface of the cylindrical body. A fire sprinkler characterized by having a vertical surface with both inner ends sharpened in a V-shape.