JP6847447B2 - Fire extinguishing head - Google Patents

Description

The present invention relates to a fire extinguishing head that sprinkles a fire extinguishing liquid.

A fire extinguishing head having a main body having an injection port, a valve that closes the injection port, a heat-sensitive body that brings the valve into close contact with the injection port, and a deflector that collides with fire extinguishing water injected from the injection port is known. .. Then, a fire extinguishing head further provided with an auxiliary deflector for guiding the fire extinguishing water jetted from the main body toward the deflector is known in order to obtain a desired watering distribution even when the flow rate of the fire extinguishing water discharged is small ( For example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2014-28020

However, in a fire extinguishing head having two deflectors, a deflector and an auxiliary deflector, the number of components increases, which complicates the structure. In addition, manufacturing control becomes strict, for example, it is necessary to strictly align parts with each other. Further, if the parts are not properly aligned with each other, the desired performance may not be exhibited.

Therefore, an object of the present invention is to provide a fire extinguishing head capable of obtaining a desired watering distribution with a small amount of water extinguishing liquid while suppressing an increase in the number of parts.

In order to solve the above-mentioned problems, the present invention has a main body having an injection port for injecting a fire extinguishing liquid, a valve for closing the injection port, and the valve being brought into close contact with the injection port and sensing a predetermined amount of heat. It includes a heat-sensitive body that releases the close contact state between the valve and the injection port, and a deflector that the fire extinguishing liquid injected from the injection port collides with, and the deflector has a first ridge that rises toward the injection port side. It has a portion, a claw portion extending from the outer edge of the deflector toward the injection port side, and a second ridge portion provided between the first ridge portion and the claw portion and bulging toward the injection port side. To provide a fire extinguishing head characterized by.

In the fire extinguishing head of the present invention having the above-described configuration, it is preferable that the second raised portion is arranged so as to surround the first raised portion.

In the fire extinguishing head of the present invention having the above configuration, it is preferable that the first raised portion protrudes toward the injection port side from the second raised portion.

Further, in the fire extinguishing head of the present invention having the above configuration, it is preferable that the first raised portion protrudes toward the injection port side from the second raised portion.

According to the present invention, it is possible to provide a fire extinguishing head capable of obtaining a desired watering distribution with a small amount of water extinguishing liquid while suppressing an increase in the number of parts.

It is a perspective view of the fire extinguishing head which concerns on this embodiment. It is sectional drawing which shows the outline of the fire extinguishing head of FIG. It is a figure which shows the deflector which constitutes the fire extinguishing head of FIG. It is a side view of the deflector of FIG. It is sectional drawing of the deflector of FIG. It is sectional drawing which shows the fire extinguishing head at the time of ejecting a fire extinguishing liquid.

Hereinafter, the fire extinguishing head according to a typical embodiment of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to these drawings. In addition, since the drawings are for conceptually explaining the present invention, the dimensions, ratios, or numbers may be exaggerated or simplified as necessary for easy understanding.

For convenience of explanation, the coordinate axes on the drawing are defined as follows. That is, the positive direction of the Z-axis is vertically upward, and the X-axis direction is a direction orthogonal to the Z-axis and in which the pair of arms 51 and 52 are aligned. The Y-axis direction is a direction orthogonal to the X-axis and the Z-axis.
Therefore, in the following description, "up" refers to the positive direction of the Z axis, and "down" refers to the negative direction of the Z axis.

The fire extinguishing head is used in a state of being connected to the fire extinguishing liquid supply pipe. Here, as an example of the fire extinguishing head, the fire extinguishing head is a closed type head in which the fire extinguishing liquid is always filled in the pipe and the fire is extinguished. The case where the liquid injection port is an upward type facing vertically upward is mentioned. Therefore, the floor surface on which the fire extinguishing liquid should be sprinkled is on the lower side (negative side of the Z axis) of the main body of the fire extinguishing head. However, the present invention is not limited to this.

In this embodiment, a fire extinguishing liquid having a flow rate (small amount of water) less than 80 L / min is assumed. However, the present invention also corresponds to a fire extinguishing liquid having a flow rate of 80 L / min or more.
Further, the fire extinguishing liquid used in the present embodiment may be a foam aqueous solution containing a foam fire extinguishing agent in a predetermined ratio, or water.

[Overall configuration of fire extinguishing head]
The overall configuration of the fire extinguishing head 1 will be described with reference to FIGS. 1, 2, and 5. As shown in the figure, the fire extinguishing head 1 is an upward closed head, and includes a main body 10, a valve 20, a heat sensitive body 30, a deflector 40, a frame 50, and a screw 60.

The main body 10 is a tubular member that is connected to a pipe for supplying a fire extinguishing liquid (not shown) and injects the fire extinguishing liquid supplied from the pipe. As shown in FIG. 2, the main body 10 includes an inflow port 11, an injection port 12, a flow path 13, and a threaded portion 14.

The inflow port 11 is an opening through which the fire extinguishing liquid flows, and the injection port 12 is an opening for injecting the fire extinguishing liquid toward the deflector 40 described later. A tubular flow path 13 is formed between the inflow port 11 and the injection port 12. The diameter of the flow path 13 decreases from the inflow port 11 toward the injection port 12, thereby improving the flow velocity of the fire extinguishing liquid injected from the injection port 12. A screw portion 14 is formed on the outer peripheral surface of the main body 10 for attachment to a pipe.

The valve 20 is a valve body that closes the injection port 12. The valve 20 has a tubular shape as illustrated in FIG. 2, and has a bottom portion 21 at one end and a collar portion 22 at the other end. Therefore, when the end portion on the bottom portion 21 side is inserted into the main body 10, the valve 20 contacts the injection port 12 at the flange portion 22 and closes the injection port 12.

The heat sensitive body 30 presses the valve 20 so that the valve 20 is in close contact with the injection port 12, and when it senses a predetermined amount of heat, the heat sensitive body 30 releases the pressure on the injection port 12 so that the fire extinguishing liquid can be injected from the injection port 12. To do. The thermal body 30 is, for example, a glass valve, which abuts on one end 31 of the valve 20 on the flange 22 side and is supported by a screw 60 at the other end 32.

The deflector 40 is a disk-shaped member with which the fire extinguishing liquid injected from the main body 10 collides, and is arranged so as to be substantially orthogonal to the injection direction (Z-axis direction) of the fire extinguishing liquid. When the fire extinguishing liquid collides with the deflector 40 and disperses, it becomes possible to obtain a predetermined watering distribution. Details of the deflector 40 will be described later.

The frame 50 is a member that connects the main body 10 and the deflector 40. The frame 50 includes a pair of arms 51 and 52 extending from the main body 10 in the direction of injecting the fire extinguishing liquid, and a connecting portion 53 connecting the tips of the arms 51 and 52 to each other. A deflector 40 is attached to the connection portion 53, and a hole 54 for inserting the screw 60 is formed in the connection portion 53.

The screw 60 is inserted into the hole 54 of the connecting portion 53, and receives the end portion 32 of the heat sensitive body 30 at the tip portion 61. The depth at which the screw 60 is inserted into the hole 54 of the connecting portion 53 is appropriately adjusted so that the heat sensitive body 30 presses the valve 20 and the valve 20 closes the injection port 12.

[Details of deflector]
The deflector 40 will be described in detail with reference to FIGS. 3 to 5.
As described above, the deflector 40 is a disk-shaped member for colliding with the fire extinguishing liquid to obtain a desired watering distribution, and is made of, for example, a metal material. The deflector 40 includes a first raised portion 42, a second raised portion 44, and a claw portion 45 as shown, and the first raised portion 42, the second raised portion 44, and the claw portion 45 are a single member. It is formed integrally. A hole 41 for attaching the deflector 40 to the connecting portion 53 of the frame 50 is formed in the center of the first raised portion 42.

The first raised portion 42 is a disk-shaped portion located on the injection port 12 side (negative side of the Z axis) with respect to the outer edge of the deflector 40, and the central portion of the deflector 40 is raised toward the injection port 12 side. It can be said that it is a formed part.

The first raised portion 42 guides the colliding fire extinguishing liquid in the direction toward the outer edge of the deflector 40. Specifically, as shown in FIGS. 4 and 5, the first raised portion 42 has a flat surface 42A facing the injection port 12 side for colliding the fire extinguishing liquid, thereby causing the colliding fire extinguishing liquid to collide. Guide the deflector 40 in the direction toward the outer edge.

The first raised portion 42 may have a hole 43 (or a slit) for passing the fire extinguishing liquid. The hole 43 (or slit) is an opening for discharging the fire extinguishing liquid accumulated in the depression on the positive side of the Z axis of the first raised portion 42 and adjusting the water amount balance.

Further, as shown in FIG. 5, the corner portion 42B located at the outer edge of the first raised portion 42 may be rounded. The smaller the radius of curvature of the roundness of the corner portion 42B, the farther the fire extinguishing liquid is scattered, so that the amount of water sprayed in the distance can be secured.

The second raised portion 44 is a portion that directs the colliding fire extinguishing liquid downward. The second raised portion 44 is provided between the first raised portion 42 and the claw portion 45, and is raised toward the injection port 12. Since the second raised portion 44 is arranged so as to surround the first raised portion 42, a sufficient amount of water can be secured below the fire extinguishing head 1.

Here, the first raised portion 42 projects toward the injection port 12 side (negative side of the Z axis) with respect to the second raised portion 44. As a result, the amount of the fire extinguishing liquid jetted near the lower side (directly below) of the fire extinguishing head 1 and the amount of the fire extinguishing liquid sprayed far away can be maintained in a well-balanced manner. That is, on the floor surface portion where the fire extinguishing liquid is dispersed and sprayed, the fire extinguishing liquid can be evenly distributed over the entire area including the vicinity immediately below the fire extinguishing head 1 and the outside. In particular, it is preferable that the first raised portion 42 protrudes toward the injection port 12 by about 2 mm from the second raised portion 44.

The claw portion 45 is a small piece that more reliably directs the colliding fire extinguishing liquid downward, and extends from the outer edge of the deflector 40 toward the injection port 12. Here, the claw portions 45 are arranged at equal intervals along the outer circumference of the deflector 40. Further, the small pieces constituting the claw portion 45 need only extend so that the tips thereof face downward, and it is not necessary that all the small pieces are aligned vertically downward as shown in FIG. By making the directions of the small pieces uneven, the fire extinguishing liquid can be dispersed more evenly, and the amount and direction of dispersion can be adjusted. The dimensions, orientation, and arrangement interval of the claw portion 45 may be appropriately set according to the required watering performance.

The deflector 40 having such a configuration can be manufactured, for example, by pressing a plate-shaped metal material to form a first raised portion 42 and a second raised portion 44, and by drilling holes 41 and 43. it can. The claw portion 45 may be formed by cutting or the like before pressing, or may be formed by cutting or the like after pressing. In any case, the claw portion 45 is bent toward the injection port 12 side after formation. The deflector 40 manufactured from one metal plate in this way is less likely to be inconsistent in manufacturing control and performance as compared with a deflector manufactured by combining a plurality of plates.

[Operation of fire extinguishing head]
The operation of the fire extinguishing head 1 will be described with reference to FIGS. 2 and 6.
As shown in FIG. 2, the fire extinguishing head 1 is usually in a state where the injection port 12 is blocked by the valve 20. Therefore, the fire extinguishing liquid supplied from the pipe stays in the main body 10 in a pressurized state.

When the heat sensitive body 30 senses a predetermined amount of heat, the heat sensitive body 30 is destroyed or deformed. Then, the valve 20 loses the pressing force of the heat sensitive body 30 that opposes the pressure of the fire extinguishing liquid, and comes off from the injection port 12. As a result, as shown by arrows W1 and W2 in FIG. 6, the fire extinguishing liquid in the main body 10 is injected from the injection port 12 toward the deflector 40.

The fire extinguishing liquid that has collided with the first raised portion 42 of the deflector 40 is directed toward the outer edge of the deflector 40. Then, the fire extinguishing liquid that has collided with the second raised portion 44 is directed downward by the second raised portion 44 and dispersed in the vicinity below the fire extinguishing head 1 (arrow W3 in FIG. 6). Further, the fire extinguishing liquid that has collided with the claw portion 45 is directed downward by the claw portion 45 and dispersed in a range relatively distant from directly below the fire extinguishing head 1 (arrow W3 in FIG. 6). At this time, since the first raised portion 42 protrudes toward the injection port 12 from the second raised portion 44, the amount of fire extinguishing liquid that collides with the second raised portion 44 and the fire extinguishing liquid that collides with the claw portion 45 Since the balance between the amount and the amount can be maintained, good watering performance can be obtained.

As described above, in the present embodiment, since the second raised portion 44 is formed between the first raised portion 42 and the claw portion 45, sufficient watering performance is provided in a range relatively close to directly below the fire extinguishing head 1. Can be obtained. At the same time, by having the claw portion 45 at the edge portion of the deflector 40, sufficient watering performance can be obtained even in a range relatively distant from directly below the fire extinguishing head 1. Therefore, it is possible to obtain a good watering distribution over the entire watering area.

Although the typical embodiments of the present invention have been described above, the present invention is not limited to these, and various design changes are possible, and these are also included in the present invention.

1 ... Fire extinguishing head,
10 ... Main body,
12 ... Injection port,
20 ... valve,
30 ... Thermal body,
40 ... deflector,
42 ... 1st ridge,
44 ... 2nd ridge,
45 ... Claws,
50 ... Frame.

Claims (1)

A main body with an injection port for injecting fire extinguishing liquid,
A valve that closes the injection port and
A heat-sensitive body that brings the valve into close contact with the injection port and releases the close contact between the valve and the injection port when a predetermined amount of heat is sensed.
A deflector with which the fire extinguishing liquid injected from the injection port collides with the fire extinguishing liquid is provided.
The deflector is
The first raised portion that rises on the injection port side and
A claw portion extending from the outer edge of the deflector toward the injection port side,
A second raised portion provided between the first raised portion and the claw portion and raised toward the injection port side, and a second raised portion.
Is an integral member to have a,
The second raised portion is arranged so as to surround the first raised portion.
The first raised portion should protrude toward the injection port side from the second raised portion.
A fire extinguishing head featuring.

Images