JPH1015108A - Sprinkler head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make uniform the sprinkling distribution of a fire extinguishing liquid by forming the cut section of the sprinkling hole of a deflector in a direction parallel to vertical plane for fitting a connecting member, regarding a structure having a disc type reflector for sprinkling a fire extinguishing liquid released from the discharge port of a body. SOLUTION: When the hot air generated due to a flame heats the glass bulb 5 of a sprinkler head 1, a sealed liquid thermally expands, thereby breaking a glass tube. Then, a water stop valve 3 closing a valve seat 26 is blown down, due to the pressure of fire extinguishing water (w) in a feedwater tube and as a result, the discharge port 22 of a body 2 opens, thereby releasing the fire extinguishing water (w). In this case, almost all of the fire extinguishing water (w) advances straight toward a deflector 6. and passes the gap of the slit 711 to 715 and so forth of the sprinkling hole 7 of each of sprinkling water hole groups 7a to 7c. Also, as the sprinkling hole 7 is formed out of the slits 711 to 715 having a cut section 70 parallel to vertical planes ra, rb and rc for fitting a connecting member, the fire extinguishing water (w) collides with the cut section 70 and is refracted. As a result, the fire extinguishing water (w) is evenly sprinkled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sprinkler head for opening a valve body by heat generated by a fire and spraying a fire extinguishing liquid such as fire-extinguishing water or an aqueous foam solution discharged from a water discharge port with a deflector. More specifically, the present invention relates to a sprinkler head for equalizing water distribution by a deflector suspended from a connecting member.

[0002]

2. Description of the Related Art A conventional sprinkler head of this kind is disclosed in Japanese Utility Model Publication No. 56-48288.
The configuration of this device is shown in FIGS. 11 (a) and 11 (b). In FIG.
1A and 1B, reference numeral 101 denotes a nozzle of a frame yoke type sprinkler head. 103 is a main deflector, 104 is a boss, 105 is a frame yoke, 106
Is a sub-deflector.

At the tip of the nozzle 101, a frame yoke 1
05 has a main deflector 103 suspended therefrom. Sub-deflectors 106 are installed adjacent to the main deflector 103, and these are mounted on the boss 4
It is fixed to. Sub deflector 10 bent upward
6 has a dish-like shape that is also bent laterally in a flange shape. Further, a portion located below the frame yoke 105 is notched. The shape of the blade of the sub deflector 106 is 2
The middle of the book frame yoke 105 is large and both sides are gradually reduced.

[0004]

The conventional frame yoke type sprinkler head shown in FIG. 11 has two main and sub deflectors 103 and 10 as described above.
6 are provided. In particular, the shape of the blade of the sub-deflector 106 is made larger in the middle of the frame yoke 105 and smaller on both sides sequentially. Therefore, the structure is complicated and the cost is increased. In addition, the two deflectors 103
There is a problem that adjustment of the relative mounting positions of the steps 106 and 106 becomes troublesome.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the conventional apparatus, and has a simple structure and is easy to assemble, and a water distribution of a fire extinguishing liquid by a deflector regardless of the presence or absence of a frame yoke. It is an object of the present invention to realize a sprinkler head that can make the sprinkler uniform.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a fire extinguishing liquid discharged from a discharge port of a main body is attached to a lower part of a connecting member suspended from the main body by a sprinkling hole cut in a thickness direction. In a sprinkler head provided with a disk-shaped deflector for water spraying, a sprinkler head in which a cross section of a water sprinkling hole formed in the deflector is formed in a direction parallel to a vertical surface of a connecting member. Further, a sprinkler head in which the water sprinkling holes are formed by a group of water sprinkling holes having a symmetrical structure with respect to the vertical surface of the connecting member is formed.

The present invention is also directed to a disk for spraying a fire extinguishing liquid discharged from a discharge port of a main body through a water sprinkling hole cut in a thickness direction and attached to a lower portion of a connecting member suspended from the main body. A sprinkler head having a deflector in the form of a differential. The sprinkler head is formed in a non-parallel manner so that a cross section of the water sprinkling hole formed in the collector facing the connecting member faces the axial direction of the connecting member. Further, a sprinkler head in which the water sprinkling holes are formed by a group of water sprinkling holes having a symmetrical structure with respect to the vertical surface of the connecting member is formed. Further, a sprinkler head in which a group of water sprinkling holes formed in the deflector is constituted by a two-stage structure and a delta type and a narrow groove type slit is formed. Further, a sprinkler head is formed in which the periphery of the deflector is bent by a concentric bending curve to form an inverted dish shape.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. FIG. 1 is a front view of a first embodiment of the present invention, and FIG.
1 is a bottom view of FIG. 1, and FIG. 3 is a side sectional view of FIG. In the drawings of the embodiment of the present invention, a frame having three frame yokes is illustrated. 1 to 3, reference numeral 1 denotes a sprinkler head, and reference numeral 2 denotes a main body of the sprinkler head 1. 21 is a mounting screw screwed around the outer periphery of the main body 2, 22 is a water outlet which penetrates the center, and 23 is a hexagon bolt type flange. Reference numeral 24 denotes a female screw provided inside the flange 23, reference numeral 25 denotes a valve chamber, and reference numeral 26 denotes a valve seat formed at an opening of the water outlet 22.

3 is a water stop valve, 4 is three frame yokes 4
A frame having a, 4b, and 4c is a glass bulb. The frame yokes 4a to 4c are vertically provided below the main body 2 at equal angular intervals. Reference numeral 31 denotes a convex valve body of the water stop valve 3, reference numeral 32 denotes a disc spring, reference numeral 33 denotes a downward hollow arrow-shaped valve guide, and reference numeral 34 denotes a gasket. The gasket 34 is made of a soft metal sheet such as copper and molded into the shape shown in the figure, and the valve 31, the disc spring 32, and the valve guide 33 are formed.
Are integrally formed to form a water stop valve 3. With such a structure of the water stop valve 3, the valve chamber 25 of the valve member at the time of fire occurrence is provided.
Is prevented, and a normal watering operation corresponding to the opening of the water stop valve 3 is started.

Reference numeral 41 denotes an annular portion of the frame 4; 42, a male screw formed on the annular portion 41 and screwed into the female screw 24;
Is a stud, 44 is an arm, and 45 is a boss. The studs 43 and the arms 44 constitute the vertical and horizontal portions of the frame yokes 4a to 4c, and the arms 44 are all concentrated in the radial direction and connected to the boss 45 having an axial center. Arm 44
Is formed into a knife shape with a vertical cross section of an acute triangular shape.
The structure is such that it does not give a strong resistance to the firewater discharge from 2.

Reference numeral 46 denotes an annular holding portion provided at the upper end of the boss 45, and 47 denotes a mounting portion having a caulking hole formed at the lower end. The glass valve 5 is interposed on the holding portion 46 and is sandwiched between the holding portion 46 and the hollow portion of the valve guide 33 on the main body 2 side. The glass bulb 5 held on the holding portion 46 includes:
A liquid having a high coefficient of thermal expansion is sealed in an ampule-shaped glass tube that has a low molecular bonding force and is easily broken, so that it functions as a heat-sensitive fire sensor.

Reference numeral 6 denotes a deflector. The structure of the deflector 6 is shown in FIGS. 4A and 4B and FIG. The deflector 6 has a thickness of 1.2 mm, for example, by pressing.
It is made by punching a metal plate having a diameter of about 29 mm (radius r = 14.5 mm) into a circular contour. 61 is a mounting hole provided at the center of the deflector 6, 62 is a concentric, unprocessed flat portion having a radius of approximately r / 2 around the mounting hole 61,
Reference numeral 7 denotes a number of watering holes cut in the thickness direction (7 is a generic name of watering holes).

The water sprinkling hole 7 has three frame yokes 4a to 4a.
According to the number of c, it is divided into three sprinkling hole groups 7a, 7b, 7c. Each of the sprinkling hole groups 7a to 7c has a cross section 70 parallel to the vertical hanging surfaces ra, rb, and rc passing through the centers of the frame yokes 4a, 4b, 4c, respectively. 711, 712... The water sprinkling hole 7 has a symmetrical structure with the vertical surfaces ra, rb, and rc, and has a symmetrical structure on both sides for each of the groups 7a, 7b, and 7c.
The mounting hole 61 is fitted to the mounting portion 47 and the deflector 6 is mounted on the lower end of the frame 4 by caulking. w, w1, w2 are fire extinguishing water.

The assembling operation of the sprinkler head 1 having the above-described structure according to the first embodiment of the present invention will be described below.
In advance, the periphery of the caulking hole is caulked as described above, and the deflector 6 and the frame 4 are fixed integrally and placed. Although not shown, a water supply pipe for supplying fire-extinguishing water w is provided behind the ceiling, and a connection pipe is opened near the ceiling toward the floor. And it is assumed that fire extinguishing water w is supplied to the water supply pipe by receiving a constant water pressure by operating a valve.

First, the body 2 is turned upside down, and the water stop valve 3 is inserted into the valve chamber 25 in the direction shown in the figure. In this state, the tip of the male screw 42 of the frame 4 to which the deflector 6 has already been fixed is slightly screwed into the female screw 24 inside the flange 23. The glass bulb 5 is taken out, and its tip is applied to the hollow portion of the valve guide 33 inserted into the valve chamber 25. When the male screw 42 of the frame 4 is screwed while supporting the glass bulb 5 applied to the bulb guide 33 on the axis, the holding portion 46 comes into contact with the bottom of the glass bulb 5. Male screw 42 as it is
Is gently screwed, the pressurized and held glass valve 5 presses the water stop valve 3 against the valve seat 26 to close the water discharge port 22. The magnitude of the pressing force applied to the glass valve 5 from both sides is adjusted by the screwing depth of the frame 4.

Thus, the glass bulb 5 is held between the main body 2 and the frame 4, and the assembly of the sprinkler head 1 alone is completed. The assembled sprinkler head 1 is connected to a water pipe already piped behind the ceiling with the deflector 6 facing the floor, and attached to the ceiling. To connect the sprinkler head 1 to the piped water supply pipe, a hexagonal bolt type flange 23 and a mounting screw 21 screwed into a connection port of the water supply pipe are used. With the sprinkler head 1 connected, the upstream side of the water stop valve 3 communicates with the fire extinguishing water w in the water supply pipe, and the communication of the fire extinguishing water w is prevented by the water stop valve 3 pressed against the glass valve 5.

Here, when a fire occurs, the flame rises due to a convection phenomenon inside the building, and a hot air flow flows on the ceiling surface.
The flowing hot air heats the glass bulb 5 of the sprinkler head 1 attached to the ceiling surface. When the glass bulb 5 is heated, the sealed liquid thermally expands, and the glass tube bursts. And the water stop valve 3 which has closed the valve seat 26 until now,
It is blown down under the pressure of the fire extinguishing water w in the water supply pipe. As a result, the water discharge port 22 of the main body 2 is opened, and the fire extinguishing water w is released from the pressure at the outlet, and is discharged downward as a solid angle having a certain spread angle.

Most of the fire extinguishing water w discharged from the water outlet 22 in a solid angle shape goes straight toward the deflector 6 and slits 711, 712 of all the water sprinkling holes 7 of each of the water sprinkling hole groups 7a to 7c.
And water is sprinkled directly on the floor with a certain spread. In addition, the water that travels straight and hits the surface of the deflector 6 is splashed off and sprayed mainly from the periphery of the deflector 6 onto the floor below. On the other hand, the fire extinguishing water w projected on the conical surface of the boss 45 or the inclined surface of the blade portion of the knife-shaped arm 44 is refracted on each projection surface and the traveling direction is turned.

In particular, since the arms 44 are provided in three directions along the vertical surfaces ra, rb, and rc, fire extinguishing water w as shown by a two-dot chain line in FIG. Three non-transmission bands v that are not transmitted are generated.
FIG. 6 is a plan view showing the water distribution in this case. FIG. 6 schematically shows a water distribution of a deflector in which water holes having the same width are radially formed. A fan-shaped non-spraying area A which is formed in three directions and fire extinguishing water w is not sprayed is formed. The non-scattering area A is a projection image corresponding to the non-transmission band v.

On the other hand, in the first embodiment of the present invention, as described above, the water sprinkling holes 7 of the disc-shaped deflector 6 are symmetrically formed around the frame yokes 4a to 4c.
a to 7c were formed. The sprinkling holes 7 of each of the groups 7a to 7c are all constituted by slits 711, 712,... Having a section 70 parallel to the vertical surfaces ra, rb, rc. For this reason, the fire extinguishing water w that has traveled straight from the water outlet 22 as described above directly hits the cut surfaces 70 of the plurality of watering holes 7 facing each other and is refracted. The fire extinguishing water w refracted by the inclined surface such as the arm 44
Also impinges on the section 70 and is sub-reflected.

The turning operation of the fire-extinguishing water w which refracts and sub-refracts at these cut sections 70 is indicated by arrows w1 and w2 in FIG. As shown in the figure, the fire-extinguishing water w that refracts and sub-refracts on the opposing cut section 70 goes around the back side of the frame yokes 4a to 4c for each of the groups 7a to 7c. Thus, the sprinkling holes 7 of each group 7a to 7c
This prevents the fan-shaped non-scattering area A based on the non-transmission band v from being generated for each group. FIG. 7 shows a watering distribution when the non-spraying area A according to the first embodiment of the present invention is compensated. As shown by the shading in FIG. 7, there is a difference in watering density between the peripheral portion and the central portion.

Embodiment 2 FIG. 8 is an explanatory diagram showing the configuration of the deflector 6 according to the second embodiment of the present invention, and FIG. 9 is a sectional view corresponding to FIG. In the second embodiment shown in FIGS. 8 and 9, the deflector 6 is formed into an inverted dish shape by bending the outer peripheral portion from near the circumference of the concentric flat portion 62 of the first embodiment downward. Here, the bending angle θ for forming the deflector 6 into an inverted dish shape is selected to be approximately 10 ° here.
Also, the sprinkling hole 7 cut out by cutting the deflector 6 in the thickness direction is constituted by three sprinkling hole groups 7a, 7b, 7c having a symmetrical structure with the frame yokes 4a, 4b, 4c interposed therebetween. This is the same as in the first embodiment.

The water sprinkling holes 7 constituting the water sprinkling hole groups 7a, 7b, 7c are slits 7 having a wide groove width and a wide and narrow two-stage structure.
21 and a delta-shaped slit 722 with a narrowed opening, and a deep-cut radially-grooved slit 723. The delta-shaped slit 722 is provided on the vertical surfaces ra, rb, and rc.
The cut sections on the side are parallel and the other cut sections are not parallel. In particular, the non-parallel cross section 70 of the delta-shaped slit 722 is inclined slightly upward with respect to the horizontal plane due to the inverted dish-shaped bending of the deflector 6. A symmetric sprinkling hole group 7a, 7b, 7c is formed on both sides with a vertical surface rd passing through the center of the three narrow groove-shaped slits 723 as a symmetric surface.

In the case of the deflector 6 of the second embodiment, the operation up to the discharge of the fire extinguishing water w when a fire occurs is the same as that of the first embodiment.
Is the same as However, the deflector 6 of the second embodiment is provided with a two-stage slit 721 and a delta-shaped slit 722. Therefore, a part of the fire-extinguishing water w which is discharged from the discharge port 22 and goes straight to the deflector 6 passes through a gap between the frame yokes 4a to 4c and the wide portion of the slit 721. The fire-extinguishing water w that has passed through this gap is sprayed on the floor behind the peripheral portions of the frame yokes 4a to 4c. In addition, the fire extinguishing water w that has passed through the narrow slit 723 having a deep cut slightly penetrates slightly in the axial direction of the deflector 6 and is sprayed.

On the other hand, the other part of the fire extinguishing water w that has traveled straight is projected onto the upward cut section 70 of the delta-shaped slit 722 to sprinkle water behind the frame yokes 4a, 4b, 4c. In addition, the fire extinguishing water w refracted by the inclined surfaces of the arms 44 and the bosses 45 is also added to the water spray of the cut section 70. In particular, since the cut section 70 has a surface component that is not parallel to the vertical planes ra, rb, and rc and faces the centripetal direction, these water sprays reach the axial center immediately below the deflector 6. As a result, according to the deflector 6 of the second embodiment, three types of slits 721 to
723 cooperate to contribute to multifaceted water spraying, and the fire extinguishing water w is evenly spread over a wide circular area. FIG. 10 shows the distribution state of watering at this time.

In the first and second embodiments, the case where three frame yokes are used has been described as an example. However, the present invention can be applied to a case where two or more frame yokes are used. In this case, the number of watering hole groups is increased or decreased according to the increase or decrease of the number of frame yokes. Also,
In the first embodiment, the case where the sprinkling hole group is a flat deflector with slits having a uniform width has been described as an example. Can also. With this configuration,
A deflector having a circular water distribution as shown in FIG. 10 and a high water density can be realized. In addition, although the slits in which the water holes are opened around the deflector are shown and described, the present invention can be applied to a closed water hole having no opening. Further, the present invention may be applied to a flash type in which a deflector is dropped and held by a connecting rod as a connecting member, and the present invention is also applied to a case where fire extinguishing water is a fire extinguishing liquid such as a foam aqueous solution. Can be.

[0027]

According to the present invention, there is provided a disk for spraying a fire extinguishing liquid discharged from a discharge port of a main body through a water sprinkling hole cut in a thickness direction and attached to a lower portion of a connecting member vertically provided to the main body. In a sprinkler head provided with a deflector in a shape of a sprinkler, a cross section of a sprinkler hole formed in the deflector is formed in a direction parallel to a vertical surface of a connecting member. Further, a sprinkler head in which the water sprinkling holes are formed by a group of water sprinkling holes having a symmetrical structure with respect to the vertical surface of the connecting member was constructed.

Further, the present invention provides a disk for spraying a fire extinguishing liquid discharged from a discharge port of a main body through a water sprinkling hole cut in a thickness direction and attached to a lower part of a connecting member vertically provided to the main body. In a sprinkler head provided with a deflector having a shape like a sprinkler head, a cross section of a sprinkler hole formed in the deflector facing the connecting member faces the axial direction of the connecting member and is formed non-parallel. Further, a sprinkler head in which the water sprinkling holes are formed by a group of water sprinkling holes having a symmetrical structure with respect to the vertical surface of the connecting member was constructed. In addition, a sprinkler head in which a group of water sprinkling holes formed in the deflector was constituted by a two-stage structure and delta type and narrow groove type slits was constructed. Further, a sprinkler head was formed in which the periphery of the deflector was bent along a concentric bending curve to form an inverted dish shape.

As a result, even when there is a non-permeation zone through which the fire extinguishing liquid does not pass due to the connecting member having the deflectors provided vertically, no fire-extinguishing liquid non-spraying area does not occur on the floor. Therefore, the fire extinguishing liquid discharged from the water outlet at the same time as the occurrence of a fire can be projected onto the deflector mounted on the lower part of the connecting member to uniformly spray water on the floor. Therefore, according to the present invention, it is possible to provide a sprinkler head which has a simple structure and is easy to assemble, and which can make the water distribution of the fire extinguishing liquid by the deflector uniform regardless of the presence or absence of the connecting member.

[Brief description of the drawings]

FIG. 1 is a front view of a first embodiment of the present invention.

FIG. 2 is a bottom view of FIG.

FIG. 3 is a side sectional view of FIG. 1;

FIG. 4 is an explanatory diagram illustrating a configuration of a deflector according to the first embodiment of the present invention.

FIG. 5 is an enlarged sectional view taken along line XX of Embodiment 1 of the present invention.

FIG. 6 is a plan view showing a conventional watering distribution for explaining the present invention.

FIG. 7 is a plan view showing a watering distribution according to the first embodiment of the present invention.

FIG. 8 is an explanatory diagram illustrating a configuration of a deflector according to a second embodiment of the present invention.

FIG. 9 is an enlarged sectional view of Embodiment 2 of the present invention.

FIG. 10 is a plan view showing a watering distribution according to the second embodiment of the present invention.

FIG. 11 is a diagram illustrating the configuration of a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sprinkler head 2 Main body 3 Water stop valve 4 Frame 4a, 4b, 4c Frame yoke (connecting member) 5 Glass valve 6 Deflector 7 Water spray holes 7a, 7b, 7c Water spray hole group 21 Mounting screw 22 Water outlet 23 Flange 24 Female screw 25 Valve chamber 26 Valve seat 31 Valve element 32 Disc spring 33 Valve guide 34 Gasket 41 Annular part 42 Male screw 43 Stud 44 Arm 45 Boss 46 Holding part 47 Mounting part 61 Mounting hole 62 Flat part 70 Cut section 71 Two-step slit 72 Delta type slit 73 Narrow groove type slit A Non-scattering area ra, rb, rc, rd Vertical surface v Non-permeable band w, w1, w2 ... Fire extinguishing water (fire extinguishing liquid)

Claims (6)

[Claims] 1. A disk-shaped deflector for spraying a fire extinguishing liquid discharged from a discharge port of the main body through a water sprinkling hole cut in a thickness direction and attached to a lower portion of a connecting member vertically provided to the main body. The sprinkler head according to claim 1, wherein a cross section of the water sprinkling hole formed in the deflector is formed in a direction parallel to a vertical surface of the connecting member. 2. The sprinkler head according to claim 1, wherein the water sprinkling holes are constituted by a group of water sprinkling holes having a symmetrical structure with respect to a vertical surface of a connecting member. 3. A disk-shaped deflector mounted on a lower part of a connecting member vertically suspended from a main body and spraying a fire extinguishing liquid discharged from a discharge port of the main body through a water sprinkling hole cut in a thickness direction. 2. The sprinkler head according to claim 1, wherein a cross section of the water sprinkling hole formed in the deflector, which faces the connecting member, faces in the axial direction of the connecting member and is formed non-parallel. Sprinkler head. 4. The sprinkler head according to claim 3, wherein said water sprinkling hole is constituted by a group of water sprinkling holes having a symmetrical structure with respect to a hanging surface of a connecting member. 5. The sprinkler head according to claim 3, wherein the group of water sprinkling holes formed in the deflector comprises a two-stage configuration and a delta type and a narrow groove type slit. 6. The sprinkler head according to claim 1, wherein a peripheral portion of the deflector is bent by a concentric bending curve to form an inverted dish shape.