JPH1199220A - Foam head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a directionality to the jetting direction by a simple constitution by a method wherein relative locations of the center of a nozzle hole by which a fire extinguishing liquid is jetted, and the center of a cone which disperses the fire extinguishing liquid, are set in such a manner that the center of the nozzle hole may be shifted in a direction where the jetting amount needs to be made larger. SOLUTION: The center of a nozzle hole 9 is shifted to the jetting direction from the central line 7 of a liquid passage 5, and the central line of an approx. truncated conical shape cone 29 on a deflector 19 is made to meet the central line 7 of the liquid passage 5, and thus, the center of the nozzle hole 9 is shifted to the jetting direction from the center of the cone 29. A fire extinguishing liquid which is jetted from the nozzle hole 9 is dispersed by the cone 29, and its one part hits the deflector 17. In this case, since the center of the nozzle hole 9 is shifted in the jetting direction from the center of the cone 29, the fire extinguishing liquid is dispersed forward, i.e., to the jetting direction by a larger amount. Also, the dispersing direction at this time is limited to more forward than an upper wall 21 and a lower wall 23 because the rear side is blocked by the upper wall 21 and the lower wall 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foam head for a fire extinguishing system, and more particularly to a foam head which requires directivity in a radial direction.

[0002]

2. Description of the Related Art In a general fire extinguishing foam head, a fire extinguishing liquid is diffused by a circular deflector over the entire circular surface of a foaming net, and bubbles are radiated in a circular shape. When installed, or when it is not necessary to radiate in a circular shape depending on the structure and shape of the fire extinguishing target, there is a problem that the fire extinguishing liquid is wasted and the fire cannot be extinguished rationally.

In order to solve such a problem, for example, there is a fire extinguishing foam head disclosed in Japanese Utility Model Publication No. Hei 7-36673. FIG. 7 shows a cross-sectional view of the fire extinguishing foam head. A conventional fire extinguishing foam head will be described with reference to FIG.
In the figure, reference numeral 62 denotes a guide attached to the middle part of the liquid passage 52A of the head main body 51, and has a spiral groove 62a for giving rotation to the fire extinguishing liquid. Reference numeral 63 denotes an L-shaped partition plate attached to the lower portion of the head main body 51 with a screw 64, and a hanging plate portion 63a which depends substantially near the center of the head main body 51.
have. Reference numeral 65 denotes a deflector mounting plate integrally formed with the hanging plate portion 63a of the partition plate 63, and reference numeral 66 denotes a semicircular deflector, which is mounted on the deflector mounting plate 65 by a semi-conical nut 67 and a screw 68.

In the fire extinguishing foam head constructed as described above, the extinguishing liquid passes through the guide 62 while passing through the liquid passage 52A.
The nozzle hole 5
3a. The discharged fire extinguishing liquid is deflector 6 within a semicircular range on one side by the action of the semi-conical shape of the nut 67 and the action of the hanging plate portion 63a of the partition plate 63.
6, is mixed with the air from the air suction port 55, is dispersed on one side by the deflector 66, and is radiated as a semicircular foam by the foaming net 56.

As another example of the conventional example, Japanese Utility Model 7-1
No. 3731 discloses a side wall type foam head for fire extinguishing equipment. 8 is a cross-sectional view of the same device, FIG. 9 is a plan view of a deflector used in the side wall type foam head, and FIG. 10 is a cross-sectional view taken along the line V-V of FIG. The configuration of the conventional side wall type foam head will be described based on the above. In FIG. 8, reference numeral 71 denotes a head main body provided with a nozzle portion 72 for injecting a fire extinguishing liquid downward and a connection port 74 for a fire extinguishing liquid supply pipe.

As shown in FIG. 8, the head main body 71 can be divided into a half-peripheral portion (hereinafter referred to as a first-half peripheral portion) R1 and another half-peripheral portion (hereinafter referred to as a second-half peripheral portion) R2. And the back wall part 75 is provided in the second half peripheral part R2 in a hanging manner. The front surface of the back wall portion 75, that is, the back wall surface 75a is flat, and the back wall surface 75a is disposed vertically behind the outlet 72a of the nozzle portion 72 (arrow B).

On the back wall 75a, an upper fire extinguishing liquid diffusing section 76 is provided.
And the lower fire extinguishing liquid diffusion portion 77 are provided in a bulging shape.
Reference numeral 79 denotes a plate-like deflector attached to the horizontal lower end surface of the back wall 75 by screws 80. The deflector 79 protrudes laterally from the lower end of the back wall surface 75a to a region below the front half R1 of the head main body 71 in the mounted state. Reference numeral 82 denotes a recessed screen attached to the outer peripheral portion of the head main body 71.
2, the deflector 79 and the lower region of the front half R1 and the rear half R2 of the head main body 71 are surrounded.

[0008] As shown in FIG.
A plurality of slits 81 are formed in a notched radial shape. The front edge of the deflector 79 is cut straight. Further, a stepped portion 85 as shown in FIG. 10 is formed at the front center of the deflector 79.

When the above-described side wall type foam head A is installed with the axis XX of the nozzle portion 72 vertically aligned, the fire extinguishing liquid is jetted vertically downward from the outlet 72a of the nozzle portion 72. In addition, the fire extinguishing liquid injected from the outlet 72a of the nozzle portion 72 collides with the surface of the upper extinguishing liquid diffusion unit 76, the surface of the lower extinguishing liquid diffusion unit 77, the deflector 79, and the like in a semi-conical shape, and diffuses radially. The direction of diffusion of the fire extinguishing liquid at this time is such that the back wall 75a has a flat rearward diffusion (arrow B).
Therefore, it is limited within the range of 180 degrees in front of the back wall surface 75a. The fire extinguishing liquid that has passed through the slit 81 of the deflector 79 is radiated immediately below. Therefore, the fire-extinguishing liquid containing the air wrapping around from the rear (arrow B side) to the front (arrow F side) is foamed by passing through the screen 82, and the fire-extinguishing foam generated by the foaming is installed. It is diffused in the 180-degree area below the location.

Further, the front edge of the deflector 79 is cut linearly and the stepped portion 85 is provided, so that the radiation pattern of the fire-extinguishing bubbles approaches a trapezoidal or square shape.

[0011]

However, in the case of the foam head for fire extinguishing disclosed in Japanese Utility Model Publication No. Hei 7-36673, the conical nut used to radiate in all circumferential directions is vertically divided. You need a semi-conical nut
It must be specially manufactured in addition to the all-around type. Further, since the L-shaped partition plate 63 extends vertically downward from the edge of the nozzle hole 53a and the hanging plate portion 63a extends below the deflector 66, the fire extinguishing that collides with the hanging plate portion 63a. Due to such a phenomenon that the liquid is reflected forward and is drawn to the flow of the fire extinguishing liquid ahead, the radiation immediately below the hanging plate portion 63a becomes insufficient, and there is a problem that uniform radiation cannot be achieved.

Further, in the case of the side wall type foam head described in Japanese Utility Model Publication No. 7-13731, the back wall portion 75 is provided in a hanging manner, and the upper fire extinguishing liquid diffusion is provided on the front surface of the back wall portion 75. The part 76 and the lower fire extinguishing liquid diffusion part 77 are provided in a bulging shape, have a very complicated shape, and are difficult to manufacture as in Japanese Utility Model Publication No. 7-36673. There is a problem that is.

In addition, since the slit 81 is not provided in the central portion of the deflector 79, the radiation immediately below the side wall type foam head A is insufficient, so that there is a problem that uniform radiation cannot be achieved as a whole.

In short, in any of the above-mentioned conventional examples, a cone (a semi-conical nut 67, an upper extinguishing liquid diffusing unit 76 and a lower extinguishing liquid diffusing unit 7) for diffusing the extinguishing liquid is used.
Since a special shape is used as the item 7), it has to be manufactured separately from a cone used for a general foam head for all-round radiation, and there is a problem that the cost is increased. In addition, any of the above-mentioned prior arts aims at merely radiating light to a semicircular portion, and does not consider even radiation to the entire radiation region including a portion directly below the head. Furthermore, actual fairness 7-1373
In the device disclosed in Japanese Patent Publication No. 1 (A), the tip portion of the deflector 79 is linearly processed in order to make the radiation pattern trapezoidal or square, and a stepped portion 85 is provided on the deflector 79. It is necessary to perform two processes of forming a straight line and providing the stepped portion 95 on the deflector 79, and there is a problem that the process is troublesome.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a foam head which can have a directivity in a radial direction with a simple structure. It is another object of the present invention to provide a bubble head that can emit light in a semicircular direction and that can emit light uniformly below the head. It is another object of the present invention to obtain a bubble head capable of emitting a rectangular beam with a simple configuration.

[0016]

In the foam head according to the present invention, the fire extinguishing liquid is jetted from a nozzle hole provided in a passage through which the fire extinguishing liquid passes, and the fire extinguishing liquid is dispersed by a cone. In the bubble head which radiates by colliding with the upper surface, the relative position between the center of the nozzle hole and the center of the cone is set so that the center of the nozzle hole is shifted in a direction in which the amount of radiation is desired to be increased.

In the deflector, a slit provided on the rear side of the cone, an upper wall provided on the upper surface side of the deflector behind the slit, and a lower portion provided on the lower surface side of the deflector behind the slit. And a wall.

Further, both end portions of the upper wall are bent in the radial direction.

Further, a notch is provided at the center of the lower wall.

Further, a notch is provided at the front edge of the deflector so as to become deeper toward the center.

Further, in the foam head which injects the fire extinguishing liquid from a nozzle hole provided in a liquid passage through which the fire extinguishing liquid passes, disperses the fire extinguishing liquid by a cone, and collides with the upper surface of the deflector to radiate the fire, The cone is provided on the deflector such that the center of the cone is located on the center line of the liquid passage, and the nozzle hole is provided shifted from the center line of the liquid passage.

Further, a wall is provided on a deflector having a slit so that a fire extinguishing liquid is radiated to one side.
The wall is constituted by an upper wall provided on an upper part of a deflector and a lower wall provided on a lower part of the deflector,
The position of the upper wall is shifted from the position of the lower wall in a direction in which the amount of radiation is desired to be increased.

Further, the deflector is characterized in that a slit is provided along the upper wall on the side where the amount of radiation is to be increased.

[0024]

FIG. 1 is a vertical sectional view of an embodiment of the present invention. In the figure, 1 is a head body, 3
Is a connection port connected to a fire extinguishing liquid supply pipe, 5 is a liquid passage, 7 is a center line of the liquid passage 5, 9 is a nozzle hole provided at the end of the liquid passage 5, and 11 is a nozzle hole. 9 is the center line. As can be seen from the figure, the center of the nozzle hole 9 is shifted to the left (radial direction) in the figure from the center of the liquid passage 5. 13 is a wire mesh attached below the head body 1, 15 is a wire mesh that clamps the outer edge of the head body 1 and the outer edge of the wire mesh 13.
Is a caulking method for attaching to the head body 1. 17
Is a deflector installed inside the wire net 13, and the deflector 17 is composed of a deflector body 19, an upper wall 21 and a lower wall 23.

Reference numeral 25 denotes a spacer having a hexagonal head on the base end side and a threaded portion formed on the distal end side; 27, a spacer collar provided between the wire mesh 13 and the deflector 17; And is fixed on the deflector 19 in a substantially truncated cone shape. Cone 29
Center line coincides with the center line 7 of the liquid passage 5. Accordingly, the relative positional relationship between the center of the nozzle hole 9 and the center of the cone 29 is such that the center of the nozzle hole 9 is shifted in the radial direction from the center of the cone 29.

FIG. 2 is a plan view of the embodiment shown in FIG. 1, and the same parts as those in FIG. 1 are denoted by the same reference numerals. In the drawing, reference numeral 31 denotes an air suction port provided in the head main body 1, and reference numeral 33 denotes a mark concave portion indicating the direction of deviation of the nozzle hole. By providing the concave portion 33, the direction is not mistaken when assembling the foam head and installing the foam head.

FIG. 3 is a plan view of the deflector 17, FIG. 4 is an AA view in FIG. 3, and FIG. 5 is an B-B view in FIG.
B and FIG. 6 are bottom views of the deflector 17. First, the shape of the deflector body 19 will be described with reference to FIGS.

The deflector body 19 is basically circular and has a hole 1 for inserting a spacer 25 in the center.
9a is provided. Further, a plurality of slits 19b are radially provided in a left half portion (a half portion on a radial direction) of the deflector body 19 in the drawing. Further, the front edge of the deflector body 19 (in the case of indicating a direction in this specification, “front” means a radiation direction, and “rear” means a direction opposite to the radiation direction). A step-shaped notch 19c is provided which becomes deeper toward the center. A slit 19d is provided on the right half side of the deflector body 19 in the drawing in a direction perpendicular to the radial direction. Note that the width of the slit 19d is formed to be larger than the width of the slit 19b so that the radiation amount immediately below the head increases.

Next, the installation position and shape of the upper wall 21 will be described with reference to FIGS. The upper wall 21 is attached by a screw 35 along a slit 19d at a position slightly behind the center of the deflector body 19. The upper wall 21 is provided with a two-stage notch at both ends, and the portion provided with the notch is bent forward to form two sets of blade portions 21a and 21b. The upper blade 21a has a larger bending angle (length) and a wider width than the lower blade 21b.

The reason why the both ends of the upper wall 21 are bent forward is that if there is no bent portion, the amount of radiation in the lateral direction increases, and the uniformity of the amount of radiation is lacking. Because it becomes. In addition, the reason why the bent part is divided into two steps is that if you try to ensure uniformity in one step, the angle of bending will be delicate,
When the adjustment becomes difficult, the adjustment is roughly made by the upper blade 21a in two stages, and the lower blade 21b is adjusted.
By making subtle adjustments, subtle adjustments can be easily made.

Next, the installation position and shape of the lower wall 23 will be described with reference to FIGS. The lower wall 23
As shown in FIG. 6, it is installed at a position slightly shifted backward from the position of the slit 19d. Also, the lower wall 23
Has a notch 23a at the center as shown in FIG. The reason why the notch 23a is provided while being slightly shifted backward from the position of the slit 19d as described above is as follows. In other words, when the cutout is not provided along the slit 19d, the flow of the foam fire extinguishing liquid radiating immediately below through the slit 19d is caused by the foam fire extinguishing liquid radiating forward and forward. It is drawn forward by the flow of air and the viscosity of the liquid, and the radiation amount in the portion immediately below is reduced. Therefore, the installation position of the lower wall 23 is
9d and a notch 23 in the center.
By providing a, the backward radiation flow is created, and this backward radiation flow is attracted to the forward radiation flow, and radiates just downward.

If the upper wall 21 and the lower wall 23 are located at the same position, the digested juice that has flowed down from the cone 29 passes through the slit 19d and immediately hits the lower wall 23, so that it is strongly reflected forward. . On the other hand, if the lower wall 23 is shifted behind the upper wall 21, the fire-extinguishing liquid that has flowed down from the cone and passed through the slit 19 d is weakened in the above-described forward reflection, and hits the lower wall 23. Since the light is guided to fall just downward, the amount of radiation downward can be increased.

In the present embodiment configured as described above, the fire extinguishing liquid injected from the nozzle hole 9 is supplied to the cone 29.
And a part thereof collides with the deflector 17. At this time, since the center of the nozzle hole 9 is shifted in the radial direction from the center of the cone 29, a large amount of fire extinguishing liquid is diffused forward, that is, in the radial direction. The diffusion direction at this time is such that the rear side is the upper wall 21 and the lower wall 23.
Therefore, the upper wall 21 and the lower wall 23 are limited in the forward direction.

Further, the front edge of the deflector body 19 is provided with a step-shaped notch 19c which becomes deeper as it approaches the center, so that the radiation distance of the front edge becomes shorter and the radiation pattern becomes rectangular. . It should be noted that the front edge of the deflector body 19 was not cut straight, but the center portion was formed into the deepest step. Only by cutting straight, the shape of the fire-extinguishing foam radiated from this front edge was reduced. This is because the experiment revealed that the shape did not become rectangular.

The slits 19b of the deflector 17
The fire extinguishing liquid that has passed through 19d is emitted downward. Note that, of the fire extinguishing liquid that has passed through the slit 19d, the fire extinguishing liquid that is radiated near the notch 23a of the lower wall 23 has a backward flow, which is drawn to the flow that is ahead of it. It is corrected right below. The flow of the fire-extinguishing liquid as described above entrains the air and foams by passing through the wire mesh 13, and the fire-extinguishing foam generated by the foaming is uniformly discharged to the protection zone.

Here, the installation of such a foam head will be described a little. For example, if there is a rectangular protective compartment, the conventional foam head must be mounted near the wall at predetermined intervals when it is mounted on the ceiling. This is because the conventional foam head has little water sprinkling in the direction directly below, and if installed far away from the wall surface, the outer peripheral portion of the protection area becomes a blind spot (portion not sprinkled). On the other hand, in the case of the foam head capable of sufficiently spraying water directly below as in the present embodiment, there is no problem even if the foam head is separated from the wall to some extent, so that the workability of head mounting is improved. The two foam heads which are back to back (facing each other outward) may be attached at predetermined intervals on the center line of the ceiling of the protected area.

In the above-described embodiment, an example is shown in which the upper wall 21 and the lower wall 23 are provided on the deflector 17 and the radiation direction is limited to a direction of 180 degrees. Even if the center of the nozzle hole 9 is displaced in the radial direction from the center of the cone 29 without installing the nozzle 23, it is possible to provide directivity in the radial direction.

In the above embodiment, a cone having a substantially frustoconical shape has been described as an example. However, the shape of the cone is not particularly limited, and may be, for example, a hemispherical shape. Any shape can be used as long as it can be applied to a head that radiates in all circumferential directions. Also, the relative position between the center of the nozzle hole and the center of the cone was matched with the center of the liquid passage and the center of the cone so that the center of the nozzle hole was shifted in the direction to increase the amount of radiation. The center may be aligned with the center of the liquid passage, and the center of the cone may be shifted from the center of the liquid passage in a direction in which the amount of radiation is desired to be reduced.

[0039]

As described above in detail, in the present invention, the relative position between the center of the nozzle hole and the center of the cone is set so that the center of the nozzle hole is shifted in the direction in which the amount of radiation is desired to be increased. Therefore, directivity can be provided in the radial direction with a very simple configuration. Further, since a conventional cone that radiates in all circumferential directions can be applied as it is, there is no need to manufacture a cone having a special shape, and the cost can be reduced.

Further, the slit is provided on the rear side of the cone in the deflector, and the upper and lower walls are provided on the deflector, so that the radiation direction can be limited to the front side of the upper and lower walls.

Furthermore, since both ends of the upper wall are bent in the radial direction, the amount of radiation in the lateral direction is limited, and uniform radiation as a whole can be realized.

Further, since the notch is provided at the center of the lower wall, a flow of the fire-extinguishing liquid is formed toward the rear, and this flow is drawn to a flow ahead of the fire extinguishing liquid and corrected right below. As a result, uniform radiation can be realized in the direction directly below.

Further, since a notch is provided at the front edge of the deflector so as to be deeper as it approaches the center, a rectangular radiation pattern can be realized with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

FIG. 2 is a plan view of the embodiment shown in FIG.

FIG. 3 is a top view of a deflector according to an embodiment of the present invention.

FIG. 4 is a view taken on line AA of FIG. 3;

FIG. 5 is a BB view of FIG. 3;

FIG. 6 is a bottom view of the deflector according to the embodiment of the present invention.

FIG. 7 is a sectional view of a conventional fire extinguishing foam head.

FIG. 8 is a sectional view of another example of a conventional fire extinguishing foam head.

FIG. 9 is a plan view of a deflector of the fire extinguishing foam head shown in FIG. 8;

FIG. 10 is a sectional view taken along the line VV in FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head main body 7 Center line of liquid passage (center line of cone 29) 9 Nozzle hole 11 Center line of nozzle hole 9 Deflector 19 Deflector body 21 Upper wall 23 Lower wall

Claims (8)

[Claims] 1. A foam head for injecting a fire extinguishing liquid from a nozzle hole provided in a liquid passage through which a fire extinguishing liquid passes, dispersing the fire extinguishing liquid by a cone, and colliding with the upper surface of a deflector to radiate, A foam head, wherein the relative position between the center of the nozzle hole and the center of the cone is set so that the center of the nozzle hole is shifted in a direction in which the amount of radiation is desired to be increased. 2. A slit provided on the rear side of the cone in the deflector, an upper wall provided on the upper surface side of the deflector behind the slit, and a lower portion provided on the lower surface side of the deflector behind the slit. The foam head according to claim 1, further comprising a wall. 3. The foam head according to claim 2, wherein the upper wall is radially bent at both ends. 4. The foam head according to claim 2, wherein a cutout portion is provided in a central portion of the lower wall. 5. The foam head according to claim 1, wherein a cut portion is provided at a front edge portion of the deflector so as to become deeper toward a center portion. 6. A foam head which injects a fire extinguishing liquid from a nozzle hole provided in a liquid passage through which a fire extinguishing liquid passes, disperses the fire extinguishing liquid by a cone, and collides with a top surface of a deflector to radiate. A bubble head provided on the deflector so that the center of the cone is located on the center line of the liquid passage, and the nozzle hole is provided shifted from the center line of the liquid passage. 7. A foam head for providing a wall to a deflector having a slit and emitting a fire extinguishing liquid to one side, wherein the wall is formed by an upper wall provided on an upper part of the deflector and a lower wall provided on a lower part of the deflector. A foam head, wherein the position of the upper wall is shifted from the position of the lower wall in a direction in which the amount of radiation is desired to be increased. 8. The foam head according to claim 7, wherein the deflector is provided with a slit on the side where the amount of radiation is to be increased, along the upper wall.