JP6438726B2 - Drencher head - Google Patents

Description

  The present invention relates to a drain head that discharges water in a film form to perform fire extinguishing and fire prevention, and can be suitably used for fire extinguishing and fire prevention in a fire prevention area where the height to the ceiling is low.

  Conventionally, a sprinkler head for spraying water over a wide range and a spray head for spraying mist-like water finer than the sprinkler head are known as water radiation heads used in water-based fire extinguishing equipment. These heads are usually installed on the ceiling of a building, and the fire extinguishing liquid is uniformly sprayed to the fire prevention area, so that the initial fire fighting of the entire fire prevention area can be efficiently performed.

  However, if the ceiling of the fire prevention area is low, even if a sprinkler head or spray head is installed on the ceiling and water is sprayed, water cannot be sprayed over a wide area, and the water spraying range per head becomes narrow. There was a problem. For this reason, in order to perform sufficient fire prevention, it is necessary to install a large number of heads, and there is a problem that the equipment cost and the construction cost increase.

  In order to solve these problems, a side wall type sprinkler head that sprays water in a specific direction or a drainer head that sprays water in a film shape (for example, Patent Document 1) can be used. It is also possible to spray water from the side rather than from the ceiling.

  However, the water spray from the sprinkler head has a large variation, and a portion with a large water spray amount and a portion with a small water spray amount are generated, and it is difficult to spray water uniformly over a wide area. Further, even when a drain head is used, it is difficult to spray water uniformly over a wide area because water is sprayed in a film shape.

Japanese Patent Laid-Open No. 08-033733

  The present invention has been made in view of the above-described conventional situation, and an object thereof is to provide a drainer head and a fire extinguishing equipment capable of spraying water uniformly and over a wide area from the periphery of the fire prevention area. .

  The drainage head of the present invention is composed of a tube with one end closed, and a plurality of slits for spraying a fire-extinguishing liquid are provided on the side wall of the tube at different positions from the one end. The sprinkling range from each slit is made different by the elevation angle of each slit being different.

  In the drain head according to the present invention, the pipe has one end closed, and the side wall of the pipe is provided with a plurality of slits for spraying a fire-extinguishing liquid at different positions from the one end. If a fire-extinguishing liquid is poured from the other end of the pipe, water is sprayed from a plurality of slits at different positions. Since the elevation angle of the plurality of slits is made different, the elevation angle of the water spray is also sprinkled according to the elevation angle of each slit, and as a result, water is sprayed over a wide range from near to far from the drainer head. be able to.

  The water flow ejected from the plurality of slits generates an air flow when flying in the air. Due to the negative pressure (Coanda effect) generated by this air flow, the water flow sprayed from one slit and the water flow sprayed from the other slit may be attracted to each other, and the water spray distribution may not be uniform. Therefore, it is necessary to keep an appropriate distance between the slits. If the distance between adjacent slits (inner and inner dimensions; the same applies hereinafter) is between 5 mm and 300 mm under the condition that 60 L is jetted at a head pressure of 0.1 MPa, the drainer head is compact and the water spray is distributed. Can also be made approximately equal.

  The width of the slit is preferably made wider as the elevation angle of the slit is larger. Water sprinkling from a slit with a large elevation angle reaches farther than watering from a slit with a small elevation angle. For this reason, when the widths of the slits are the same, the water sprayed from the slit that sprays a wider area has a smaller water spray amount per unit area and cannot be sprayed uniformly over a wide area. On the other hand, if the width of the slit is increased as the elevation angle of the slit is increased, the amount of water sprayed from the slit per unit time increases. For this reason, the amount of water sprayed per unit area is averaged, and more uniform water spraying becomes possible.

  The fire extinguishing equipment according to the present invention includes a plurality of drainage heads according to the present invention disposed around a fire prevention area, and a water feeding device for feeding a fire extinguishing liquid to the drainage heads. For this reason, it is not necessary to install a head above a fire prevention area, and even if the ceiling is low, fire extinguishing equipment can be installed without problems.

It is a model perspective view of the fire extinguishing equipment of Example 1. It is a side view of a drainer head. It is a side view which shows the watering from a drainer head to a belt conveyor. It is a top view which shows the watering from a drainer head to a belt conveyor.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.
Example 1
The fire extinguishing equipment of Example 1 is shown in FIG. This fire extinguishing equipment is used when the rubber raw material 101 transported by the belt conveyor 100 is ignited by the heat of the heater in the intermediate raw material drying process of synthetic rubber such as nitrile rubber (NBR) or butadiene rubber (BR). Fire extinguishing equipment to prevent the spread of fire. On each side of the belt conveyor 100, three drainage heads 1 for spraying a fire-extinguishing liquid are alternately arranged in a staggered pattern. The drainer head 1 is vertically connected from a water pipe 2, the water pipe 2 is connected to a water pump 3, and the water pump 3 is connected to a fire extinguishing water storage tank (not shown). A pressure gauge 4 is provided at the end of the water supply pipe 2. Further, an optical fiber temperature monitoring sensor 5 is provided above the center of the belt conveyor 100, and the optical fiber temperature monitoring sensor 5 is connected to a control panel 6 that controls the water pump.

The drainer head 1 is made of brass and has a circular tube shape with one end closed as shown in FIG. 2, and has an outer diameter of 20 mm and an inner diameter of 15 mm. On the side surface of the drain head 1, a slit 1 a is provided at a position farthest from the closed end, a slit 1 b is provided at an intermediate position, and 11 c is provided at a closest position.
The interval between the slit 1a and the slit 1b is 15 mm, and the interval between the slit 1b and the slit 1c is 20 mm. The elevation angles of the slits are -45 ° for slit 1a, -20 ° for slit 1b, and -5 ° for slit 1c. Each slit width is 1.1 mm for the slit 1a, 1.8 mm for the slit 1b, and 2.5 mm for the slit 1c. A tapered male screw portion 1d is provided on the non-closed side of the drain head 1. Each slit is directed in a direction facing the belt conveyor 100, and the height from the belt conveyor 100 to the upper end of each slit is 30 cm.

  In addition to brass, the drainer head 1 can be made of stainless steel or bronze, and a suitable one is selected depending on the installation environment, durability, and economy.

  In the fire extinguishing equipment of the first embodiment configured as described above, when the synthetic rubber raw material 101 transported by the belt conveyor 100 shown in FIG. 1 ignites, the optical fiber temperature monitoring sensor 5 senses and the sensing signal is controlled. Reported to board 6. Thereby, a drive signal is transmitted from the control panel 6 to the water supply pump 3, and the water supply pump 3 supplies the fire extinguishing liquid from the fire extinguishing water storage tank to the water supply pipe 2. As shown in FIGS. 3 and 4, water is sprinkled in a fan shape from the slits 1 a, 1 b, 1 c of each drainage head 1 toward the belt conveyor 100. Here, since the elevation angles of the slits are −45 ° for the slit 1a, −20 ° for the slit 1b, and −5 ° for the slit 1c, the slits 1a, 1b, and 1c of each drainer head 1 are used. The sprinkling arrival distances l, m, and n to the belt conveyor 100 are l <m <n. The slits 1a, 1b, and 1c have a width of 1.1 mm for the slit 1a, 1.8 mm for the slit 1b, and 2.5 mm for the slit 1c. Therefore, the amount of water sprayed per unit time is slit 1a <slit 1b < It becomes the slit 1c. On the other hand, as shown in FIG. 4, since the watering range is slit 1a> slit 1b> slit 1c, the amount of water sprayed per unit area is averaged, and more uniform watering becomes possible.

  In the fire extinguishing equipment of the first embodiment, as shown in FIG. 1, since the drain head 1 is installed on both sides of the belt conveyor 100 which is a fire prevention area, even if the ceiling on the belt conveyor 100 is low. Can also be installed. In addition, since the three drainage heads 1 are alternately arranged in a staggered manner on each side of the belt conveyor 100, the water spray ranges from the drainage heads 1 are difficult to overlap, and the entire belt conveyor 100 is fully covered. Can be watered evenly.

  Therefore, according to the fire extinguishing equipment of Example 1, it is possible to spray water uniformly and over a wide area from the periphery of the fire prevention area to the entire fire prevention area.

In addition, as water for fire extinguishing, not only water but also a penetrant aqueous solution or a foam fire extinguishing agent aqueous solution can be used. The penetrant aqueous solution is suitable because it can easily penetrate into substances that are difficult to wet with water, such as rubber, so that fire extinguishing can be more reliably performed.
Further, as a modification of the first embodiment, water may be fed only from the drain head at the location where the optical fiber temperature monitoring sensor 5 detects the ignition.
Furthermore, the fire prevention area is divided, a plurality of drain heads are assigned to each fire prevention area, and water is supplied from the plurality of drain heads in the fire prevention area where the optical fiber temperature monitoring sensor 5 detects the ignition. May be.

  The installation height of the drainer head, the position of each slit in the drainer head, the elevation angle and the width, etc., can be selected uniformly according to the shape and size of the fire zone and the water supply pressure. It is preferable that water can be sprayed throughout.

  The present invention is not limited to the description of the embodiments and examples of the invention described above. Various modifications are included in the present invention as long as those skilled in the art can easily conceive without departing from the scope of the claims.

DESCRIPTION OF SYMBOLS 1 ... Drencher head 1a, 1b, 1c ... Slit 2, 3, 5, 6 ... Pressurized water supply apparatus (2 ... Water supply pipe, 3 ... Water supply pump (water supply apparatus),
5 ... Optical fiber temperature monitoring sensor, 6 ... Control panel)

Claims (4)

Made from one end is closed tube, the side wall of the tube has a plurality of slits are provided for sprinkling the liquid for fire extinguishing in different distances from the end, strike the inclined surface of each said slit The drainage head is characterized in that the angle of elevation is the same but the angle of elevation is different, the direction of the inclined surface of the water spray from each slit is the same, and the range of water spray is different.   The drain head according to claim 1, wherein the width of the slit is increased as the elevation angle of the slit is increased.   The drain head according to claim 1 or 2, wherein an interval between adjacent slits in the plurality of slits is 5 mm or more and 300 mm or less.   A fire extinguishing equipment comprising a plurality of drainer heads according to any one of claims 1 to 3 disposed around a fire prevention area, and a water feeding device for feeding a fire extinguishing liquid to the drain heads.

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