JP2019092790A - Head for fire extinction - Google Patents

Abstract

To provide a head for fire extinction capable of preventing surely lodgment of a valve to a deflector while being produced at low cost.SOLUTION: A head for fire extinction comprises: a body having an injection port for injecting a fire extinction liquid; a deflector to which the fire extinction liquid injected from the injection port collides; a valve for closing the injection port and having a head part on whose outer peripheral face, a groove is formed along the peripheral direction; a thermosensitive body for bringing the valve into tight contact with the injection port, and releasing a tight contact state of the valve and injection port when sensing a prescribed heat quantity; a pair of arms extending from the body toward the deflector, and arranged so that the valve is interposed therebetween; and a filamentous spring which is extended between the pair of arms, engaged to the groove of the valve, and energizes the valve to a direction being almost orthogonal to the injection direction of the injected liquid. An outer diameter of the head of the valve is equal to or less than a half of a distance between the pair of arms.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a extinguishing head for sprinkling extinguishing fluid.

  In the sprinkler head, when the heat-sensitive valve-opening member senses the heat of a fire, it ruptures or deforms, the valve body is detached from the water outlet, and the water outlet is opened. Fire extinguishing water discharged from the water outlet collides with the deflector and scatters. In this sprinkler head, at the time of water discharge, the valve body may stay in the central portion of the deflector, and so-called lodgement may occur where normal watering is not performed.

  In order to prevent such lodgement, a sprinkler head is known which is equipped with a spring for applying a lateral force to the valve body. Then, in order to prevent the spring from being caught by the builder's clothes etc., a large diameter portion is formed at the upper end of the valve body, and the outer diameter of the large diameter portion is to a position approximately halfway between the ring groove and the frame. A sprinkler head is known in which the diameter is enlarged and the large diameter portion is formed to cover approximately half of the spring exposed to the deflector side (for example, Patent Document 1).

Patent No. 4398450

  However, in the above-described sprinkler head, the shape of the valve body is complicated and the size of the valve body must be increased, which increases the manufacturing cost. Also, it is necessary to adopt a spring with sufficient performance to reliably prevent lodgement of a large valve body, which also causes an increase in manufacturing cost.

  Therefore, an object of the present invention is to provide a fire extinguishing head capable of reducing manufacturing costs while reliably preventing lodgement of the valve with the deflector.

In order to solve the problems described above, the present invention is
A main body having an injection port for injecting a extinguishing fluid;
A deflector against which the extinguishing fluid jetted from the jet nozzle collides;
A valve having a head closing the injection port and having a groove formed along the circumferential direction on the outer peripheral surface;
A thermal element which brings the valve into close contact with the injection port and releases the close contact state between the valve and the injection port when a predetermined amount of heat is detected;
A pair of arms extending from the body towards the deflector, the valve being interposed therebetween;
And a linear spring which is stretched between the pair of arms and engaged with the groove of the valve to bias the valve in a direction substantially orthogonal to the injection direction of the injection liquid.
The outer diameter of the head of the valve is less than half the distance between the pair of arms;
To provide a extinguishing head characterized by

  In the fire extinguishing head of the present invention having the above-described configuration, it is preferable that the groove is formed over the entire circumference of the head.

  In the fire extinguishing head according to the present invention having the above-mentioned configuration, preferably, the groove is formed to expose at least 2/3 of the total length of the spring when viewed from the deflector side.

  According to the present invention, it is possible to provide a fire extinguishing head capable of reducing manufacturing costs while reliably preventing lodgement of the valve with the deflector.

It is a perspective view showing an outline of a fire extinguishing head concerning a 1st embodiment. It is a side view of the head for fire fighting of FIG. It is the sectional view on the AA line of FIG. It is the BB sectional drawing of FIG. It is a perspective view of the valve which comprises the head for fire fighting of FIG. It is a perspective view of the head for fire extinguishing of FIG. 1 in the state which the thermosensitive body shattered. FIG. 2 is a perspective view of the extinguishing head of FIG. 1 with the valve pushed out of the jet. It is a perspective view of the head for fire-fighting of Drawing 1 in the state where a valve was pushed out from an injection opening. It is a perspective view which shows the outline of the head for fire fighting which concerns on 2nd Embodiment. It is a side view of the head for fire fighting of FIG. It is the CC sectional view taken on the line of FIG.

  Hereinafter, a extinguishing head according to a representative 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. Further, since the drawings are for explaining the present invention conceptually, the dimensions, ratios or numbers may be exaggerated or simplified as necessary for easy understanding.

For convenience of explanation, coordinate axes on the drawing are defined as follows. That is, the positive direction of the Z-axis is substantially vertically upward, and the X-axis direction is a direction perpendicular to the Z-axis and in which the pair of arms 51 and 52 (151, 152) are aligned. The Y-axis direction is a direction orthogonal to the X-axis and the Z-axis.
Therefore, in the following description, “upper” refers to the positive direction of the Z axis, and “lower” refers to the negative direction of the Z axis.

The fire extinguishing head is used in a state of being connected to a pipe for supplying a extinguishing fluid. Here, as an example of the extinguishing head, a closed head in which the pipe is always filled with the extinguishing liquid will be mentioned. The first embodiment is an application example to a downward type closed type head in which the jet port of the extinguishing solution is directed substantially downward in the vertical direction (the negative side of the Z axis), and the second embodiment is substantially the jet port of the extinguishing solution. It is an application example to the closed type head of the upward type which turns to a perpendicular upper part (positive side of Z axis). Therefore, it can be said that the Z axis indicates the injection direction (substantially vertically downward and substantially vertically upward).
The fire extinguishing solution used here may be a foam aqueous solution containing a foam fire extinguishing agent at a predetermined ratio, or may be water.

First Embodiment
The extinguishing head 1 according to the first embodiment will be described with reference to FIGS. 1 to 8.
As shown in FIG. 1, the fire extinguishing head 1 is a downward closed type head including a main body 10, a valve 20, a heat sensor 30, a deflector 40, a frame 50, and a spring 60. Hereinafter, these components will be specifically described.

  The main body 10 is a tubular member which is connected to a pipe for supplying a extinguishing fluid (not shown) and jets the extinguishing liquid supplied from the pipe. As shown in FIG. 3, the main body 10 includes an inflow port 11, an injection port 12, a flow path 13, and a screw portion 14.

  The inflow port 11 is an opening into which the extinguishing fluid flows, and the injection port 12 is an opening from which the extinguishing fluid is injected toward the deflector 40 as shown in FIG. A tubular flow path 13 is formed between the inlet 11 and the injection port 12. Further, 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 and is made of, for example, a metal material such as brass. As shown in FIG. 5, the valve 20 has a tubular portion 21 and a head 22 provided at one end thereof.

  The head portion 22 has a disk shape or a bowl shape, and has an outer diameter larger than the diameter of the injection port 12 as shown in FIG. The head 22 also has a hole 25 at the center for receiving the tip of the heat sensitive body 30.

  Grooves 26 are formed on the outer peripheral surface of the head 22 along the circumferential direction. As shown in FIG. 4, when the spring 60 is bridged between the frames 50 (arms 51 and 52), the spring 60 is inserted into the groove 26. Then, the spring 60 in an elastically deformed state is engaged with the groove 26 so that the spring 60 and the valve 20 are engaged, and the bias of the valve 20 by the spring 60 (pressing in the direction P in FIG. 1) is maintained. It becomes.

  The groove 26 is preferably provided around the entire circumference of the head 22 (see FIG. 4). This eliminates the need to pay attention to the orientation of the valve 20 when mounting the spring 60, and facilitates the mounting of the spring 60 on the valve 20 and the arms 51, 52. This contributes to the reduction of the manufacturing cost of the extinguishing head 1.

  The groove 26 is preferably formed to expose at least 2/3 of the total length of the spring 60 as viewed from the deflector 40 as shown in FIG. By limiting the contact area between the valve 20 and the spring 60, the restoring force of the spring 60 can be efficiently transmitted to the valve 20, so that the size and weight of the valve 20 described later can be reduced. It is possible to reduce the cost associated with the decrease in the required performance of the spring 60.

  The outer diameter L of the head 22 is preferably equal to or less than half the distance M between the frames 50 (arms 51, 52) as shown in FIG. In other words, it is preferable that the formula (1): L ≦ 0.5 × M (where the units of L and M are the same) holds. Thus, the valve 20 can be reduced in size and weight, and the material cost of the valve 20 can be reduced. Also, since the spring 60 can more reliably fly the valve 20 and the restoring force of the spring 60 required for lodgement prevention can be small, the performance of the spring 60 can also be lowered, which is another reason. It leads to cost reduction.

  The outer diameter of the end on the head 22 side of the cylindrical portion 21 is approximately equal to or slightly smaller than the diameter of the injection port 12. That is, by reducing the gap with the injection port 12 at the end of the cylindrical portion 21 on the head 22 side, the sealing performance of the valve 20 is enhanced, and the leakage of the extinguishing fluid is prevented.

  Further, the outer diameter of the tip of the cylindrical portion 21 (the end on the opposite side to the head 22) is smaller than the outer diameter of the end on the head 22 side, and a small diameter portion 23 is formed. As shown in FIG. 7, when the valve 20 is pushed out to the small diameter portion 23, the head 22 of the valve 20 is inclined by the pressure of the spring 60, thereby suppressing the lodgement of the valve 20 to the deflector 40 . A tapered portion 24 whose outer diameter gradually changes is connected to the small diameter portion 23. However, the tapered portion 24 may have a stepped shape, for example.

  Therefore, as shown in FIG. 3, in a state where the tip of the cylindrical portion 21 is inserted into the main body 10 through the injection port 12, the valve 20 contacts the edge of the injection port 12 at the head 22 and It will close the mouth 12. A sealing material may be interposed between the valve 20 (head 22) and the injection port 12 to prevent leakage of the extinguishing fluid.

  Next, the heat-sensitive body 30 presses the valve 20 so that the valve 20 is in close contact with the injection port 12 (see FIG. 3), and releases the pressure of the valve 20 when detecting a predetermined amount of heat. Allows the injection of liquid (see FIGS. 6-8). The heat sensitive body 30 is, for example, a glass valve, and as shown in FIG. 3, is inserted into the hole 25 of the valve 20 at one end and supported by the screw 31 at the other end.

  The deflector 40 is a disk-like member with which the fire extinguishing liquid jetted from the main body 10 collides, and as shown in FIG. 2, substantially orthogonal to the jetting direction (Z-axis direction) of the fire extinguishing liquid (approximately in the XY plane) Parallel) are arranged. When the fire extinguishing liquid collides with the deflector 40 and disperses, it becomes possible to obtain a predetermined water distribution.

  As shown in FIG. 1, the deflector 40 is provided with a plurality of slits 41 directed from the outer edge toward the center, and a tongue 42 is formed between the plurality of slits 41. By the slits 41, a sufficient amount of water can be secured vertically below the extinguishing head 1. Here, the slits 41 are provided at equal intervals in the outer circumferential direction of the deflector 40, but this interval may be appropriately changed according to the required water spray performance.

  The tongue piece 42 is generally parallel to the XY axis, but may be adjusted to tilt upward or downward (positive side or negative side of the Z axis) according to the required water distribution (see FIG. 2). This makes it possible to disperse the extinguishing fluid more evenly.

  Next, the frame 50 will be described. The frame 50 is a member that connects the main body 10 and the deflector 40. As shown in FIG. 1, the frame 50 is a connecting portion that connects a pair of arms 51 and 52 extending along the ejection direction (negative direction of the Z axis) of the extinguishing liquid from the main body 10 and the tip portions of the arms 51 and 52 And 53. The deflector 40 is attached to the connection portion 53, and a screw portion 31 for supporting the heat-sensitive body 30 is attached.

  A spring 60 is stretched between the arms 51 and 52. The spring 60 is a linear spring or wire made of, for example, a metal material such as stainless steel. The spring 60 may be substantially linear or bent in the state where no external force is applied, but in the state where it is mounted between the arms 51 and 52, the restoration is such that the valve 20 is appropriately repelled. It is necessary to have power.

  As shown in FIG. 4, the spring 60 is engaged with the arms 51 and 52 at both ends in a state of being elastically deformed in a substantially L shape, and is fitted into the groove 26 of the valve 20 near the center. Therefore, the spring 60 presses the valve 20 in the direction P (the direction orthogonal to the ejection direction of the extinguishing fluid) of FIG. 1 by its restoring force. Note that both ends of the spring 60 may be bent toward the arms 51 and 52 or may be bent along the main body 10, for example, in order to prevent the builder or the builder from being caught in the clothes.

As a result, the valve 20 behaves as follows in response to the change of state.
That is, in the normal state, as shown in FIG. 1, the head 1 for fire extinguishing is in a state where the injection port 12 is closed by the valve 20, and the extinguishing fluid supplied from the pipe is in the pressurized state. Stay inside.

  When the heat sensitive body 30 senses a predetermined amount of heat, the heat sensitive body 30 is broken or deformed (see FIG. 6). Then, the valve 20 can not resist the pressure of the extinguishing fluid, and tries to come out of the injection port 12 as shown in FIG. At this time, the head 20 of the valve 20 in a state of being separated from the injection port 12 up to the tapered portion 24 is inclined in the direction Q of FIG.

  Furthermore, when the valve 20 completely comes out of the injection port 12, the extinguishing fluid in the main body 10 is injected from the injection port 12 toward the deflector 40 and water is sprayed from the deflector 40. At this time, as shown in FIG. 8, the head 22 of the valve 20 is flipped by the spring 60 being restored, and deviates from the direction connecting the injection port 12 and the screw portion 31 (center of the deflector 40). This ensures that the valve 20 rides in the center of the deflector 40 to prevent normal watering, ie, lodgement.

  Moreover, by making the outer diameter L of the head 22 of the valve 20 equal to or less than half the distance M between the arms 51 and 52, the valve 20 can be made smaller and lighter. As a result, the valve 20 can be more reliably blown by the spring 60, and the restoring force of the spring 60 required for lodgement prevention can be small, so that the performance of the spring 60 can be lowered, thereby reducing the cost. Connect.

Second Embodiment
The extinguishing head 2 according to the second embodiment will be described with reference to FIGS. 9 to 11.
The fire extinguishing head 2 is an upward facing closed head, and as shown in FIG. 9, includes a main body 110, a valve 120, a heat sensing member 130, a deflector 140, a frame 150, and a spring 160.

  Although the fire extinguishing head 2 is different from the extinguishing head 1 according to the first embodiment in the mounting direction, the main body 110, the valve 120, the heat sensitive body 130, the frame 150, and the spring 160 among the components are the same as in the first embodiment. It is similar to the corresponding component of the head 1 for fire extinguishing. Therefore, detailed description of these similar components is omitted.

  And since the fire extinguishing head 2 is different from the fire extinguishing head 1 according to the first embodiment in the mounting direction, the configuration of the deflector 140 is different from the deflector 40 according to the first embodiment. Specifically, as shown in FIG. 9, the deflector 140 has a flat plate shape, and has a plurality of claws 141 at the outer edge.

  The claw portion 141 is a small piece for more reliably directing the colliding fire extinguishing liquid downward, and extends from the outer edge of the deflector 140 to the injection port 112 side. Here, the claws 141 are arranged at equal intervals along the outer periphery of the deflector 140, but the present invention is not limited to this.

  Further, it is sufficient that the claws 141 extend so that their tips are directed downward, and it is not necessary that all the claws 141 be aligned vertically downward. By making the direction of the claws 141 uneven, the extinguishing fluid can be dispersed more evenly. In addition, the dimension, direction, and arrangement | positioning space | interval of the nail | claw part 141 may be suitably set according to the water spray performance requested | required.

  Next, the operation of the extinguishing head 2 will be described. The operation of the extinguishing head 2 is basically the same as that of the extinguishing head 1 according to the first embodiment. However, since the direction of the extinguishing head 2 is different from that of the extinguishing head 1 according to the first embodiment, the extinguishing head 2 operates as follows.

  That is, in the normal state, the fire extinguishing head 2 is in the state in which the injection port 112 is closed by the valve 120 as shown in FIG. When the heat sensor 130 senses a predetermined amount of heat, the heat sensor 130 is broken or deformed, and the valve 120 is disengaged from the injection port 112. As a result, the fire extinguishing liquid in the main body 110 is sprayed from the injection port 112 toward the deflector 140, collides with the deflector 140 and the claw portion 141, and is sprayed.

  At this time, since the spring 160 biases (presses) the valve 120 in the direction R in FIG. 9, when the valve 120 deviates from the injection port 112, the valve 120 moves to the center (screw portion 131) of the deflector 140. Get out of the direction Thereby, lodgement of valve 120 can be controlled certainly.

  The valve 120 according to the second embodiment is also reduced in size and weight as the valve 20 according to the first embodiment, and contributes to cost reduction by reducing the performance of the spring 60.

  As mentioned above, although representative embodiments of the present invention were described, the present invention is not limited to these, and various design changes are possible, and they are also included in the present invention.

1, 2 ... head for fire fighting,
10, 110 ... main body,
12, 112 ... injection port,
20, 120 ... valve,
26, 126 ························· · · · · · · · · · · · · · · · · · · · 30
40, 140 ··· Deflector,
50, 150 ... frame,
51, 52, 151, 152 ... arm 60, 160 ... spring.

Claims (3)

A main body having an injection port for injecting a extinguishing fluid;
A deflector against which the extinguishing fluid jetted from the jet nozzle collides;
A valve having a head closing the injection port and having a groove formed along the circumferential direction on the outer peripheral surface;
A thermal element which brings the valve into close contact with the injection port and releases the close contact state between the valve and the injection port when a predetermined amount of heat is detected;
A pair of arms extending from the body towards the deflector, the valve being interposed therebetween;
And a linear spring which is stretched between the pair of arms and engaged with the groove of the valve to bias the valve in a direction substantially orthogonal to the injection direction of the injection liquid.
The outer diameter of the head of the valve is less than half the distance between the pair of arms;
A extinguishing head characterized by The groove is formed over the entire circumference of the head,
The head for fire extinguishing according to claim 1, characterized in that The groove is formed to expose at least 2/3 of the entire length of the spring when viewed from the deflector side.
The fire extinguishing head according to claim 1 or 2, characterized in that