JP3846591B2 - Sprinkler head - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sprinkler head that opens a valve body by heat caused by the occurrence of a fire and sprays fire extinguishing water such as fire extinguishing water and foam aqueous solution discharged from a water outlet with a deflector, and more specifically, is suspended from a connecting member. It relates to a sprinkler head that makes the water distribution by the installed deflector uniform.
[0002]
[Prior art]
An example of this type of conventional sprinkler head is disclosed in Japanese Utility Model Publication No. 56-48288. The configuration of this apparatus is shown in FIGS. 11 (a) and 11 (b). In FIGS. 11A and 11B, 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, and 106 is a sub-deflector.
[0003]
A main deflector 103 suspended from a frame yoke 105 is provided at the tip of the nozzle 101. Sub-deflectors 106 are installed adjacent to the main deflector 103, and these are fixed to the boss 4. The end of the sub deflector 106 bent upward is a dish-like shape bent in a bowl shape also in the lateral direction. Further, a portion located below the frame yoke 105 is cut out. The blade shape of the sub-deflector 106 is such that the middle of the two frame yokes 105 is large and the both sides are gradually reduced.
[0004]
[Problems to be solved by the invention]
The conventional frame yoke type sprinkler head shown in FIG. 11 is provided with two main and sub deflectors 103 and 106 as described above. In particular, the blade shape of the sub-deflector 106 is formed such that the middle of the frame yoke 105 is large and the both sides are sequentially small. Therefore, there is a problem that the structure is complicated and the cost is increased, and the adjustment of the relative mounting positions of the two deflectors 103 and 106 is troublesome.
[0005]
The present invention has been made to solve the above-described problems of the conventional apparatus. The structure is simple and easy to assemble, and the water spray distribution of the fire-extinguishing liquid is made uniform regardless of the presence or absence of the frame yoke. This is intended to realize a sprinkler head that can be used.
[0006]
[Means for Solving the Problems]
The present invention comprises a deflector having a plurality of slits that open at the outer peripheral edge, and a frame yoke that is mounted on the lower end of the deflector and is suspended from the main body. The fire extinguishing water discharged from the discharge port of the main body by the deflector In the sprinkler head for spraying water, the slit of the deflector below the frame yoke is composed of a wide and narrow two-stage slit having a wide groove width on the opening side, and the portion having the wide groove width of the slit is It is formed wider than the width of the frame yoke, and allows the fire-extinguishing water to pass through a gap between the frame yoke and the wide portion of the slit.
[0007]
The present invention also includes a deflector having a slit that opens at an outer peripheral edge, and a frame yoke that is mounted on the lower end of the deflector and is suspended from the main body, and the fire extinguishing fire discharged from the discharge port of the main body by the deflector. In the sprinkler head for spraying water, the vertical cross section on the side of the vertical surface of the vertical surface is parallel to the frame yoke and the axis of the sprinkler head on both sides of the slit of the deflector below the frame yoke. A slit that is parallel and has a non-parallel cross section of the other side is provided, the cross section of the non-parallel slit is inclined upward with respect to the horizontal plane, and the fire-extinguishing water projected on the cross section of the slit is Water is sprayed on the back side of the frame yoke.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1. FIG.
1 is a front view of Embodiment 1 of the present invention, FIG. 2 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. Reference numeral 21 denotes a mounting screw screwed on the outer periphery of the main body 2, 22 denotes a water discharge port penetrating the center portion, and 23 denotes a hexagon bolt flange. Further, 24 is a female screw provided inside the flange 23, 25 is a valve chamber, and 26 is a valve seat formed in the opening of the water outlet 22.
[0009]
3 is a water stop valve, 4 is a frame having three frame yokes 4a, 4b and 4c, and 5 is a glass valve. The frame yokes 4a to 4c are suspended below the main body 2 at equiangular intervals. 31 is a convex valve body in the water stop valve 3, 32 is a disc spring, 33 is a downward hollow arrow-shaped valve guide, and 34 is a gasket. A soft metal thin plate such as copper is used for the gasket 34 and is molded into the shape shown in the figure, and the water stop valve 3 is configured by integrally surrounding the valve body 31, the disc spring 32 and the valve guide 33. Such a structure of the water stop valve 3 prevents a logement in the vicinity of the valve chamber 25 of the valve member at the time of a fire, and shifts to a normal watering operation in response to the opening of the water stop valve 3. It has become.
[0010]
Reference numeral 41 denotes an annular portion of the frame 4, 42 denotes a male screw formed in the annular portion 41 and screwed into the female screw 24, 43 denotes a stud, 44 denotes an arm, and 45 denotes a boss. The stud 43 and the arm 44 constitute a vertical part and a horizontal part of the frame yokes 4a to 4c, and both the arms 44 are concentrated in the radial direction and connected to an axial boss 45. The arm 44 is formed in the shape of a knife having an acute triangle in the longitudinal section, and has a structure that does not give strong resistance to the discharge of the fire-extinguishing water projected from the water discharge port 22.
[0011]
46 is an annular holding portion provided at the upper end of the boss 45, and 47 is a mounting portion in which a caulking hole is formed at the lower end. The glass bulb 5 is interposed on the holding portion 46 and is sandwiched between the hollow portion of the bulb guide 33 on the main body 2 side. The glass bulb 5 held on the holding portion 46 functions as a heat-sensitive fire sensor by enclosing a liquid having a high coefficient of thermal expansion inside an ampoule-shaped glass tube that has a weak molecular bonding force and is easily broken. Has come to fulfill.
[0012]
6 is a deflector. The structure of the deflector 6 is shown in FIGS. 4 (a), 4 (b) and FIG. The deflector 6 is made by punching a metal plate having a thickness of about 1.2 mm into a circular contour shape of 29φ (mm) (radius r = 14.5 mm) by, for example, pressing. 61 is a mounting hole provided in the center of the deflector 6, 62 is a concentric and non-processed flat part having a radius of about r / 2 around the mounting hole 61, and 7 is a large number of sprinklers installed in the thickness direction. It is a hole (7 is a general term for watering holes).
[0013]
The water spray holes 7 are divided into three water spray hole groups 7a, 7b and 7c corresponding to the number of the three frame yokes 4a to 4c. Each of the sprinkling hole groups 7a to 7c has a vertical cross section 70 parallel to the vertically extending surfaces ra, rb and rc passing through the centers of the frame yokes 4a, 4b and 4c, respectively, and slits of equal groove widths opened to the outer peripheral edge. 711, 712... The sprinkling hole 7 has symmetrical surfaces on the suspended surfaces ra, rb and rc, and both sides have a symmetrical structure for each group 7a, 7b and 7c. Then, the deflector 6 is mounted on the lower end of the frame 4 by fitting the mounting hole 61 to the mounting portion 47 and caulking. w, w1, and w2 are fire extinguishing water.
[0014]
Next, the assembling operation of the sprinkler head 1 according to the first embodiment of the present invention having such a configuration will be described. As described above, the periphery of the caulking hole is caulked in advance, and the deflector 6 and the frame 4 are fixed integrally. Moreover, although not shown in figure, the water supply pipe which supplies the fire-extinguishing water w to the back of a ceiling is piped, and the connection pipe is opening toward the floor surface near the ceiling surface. And it shall be comprised so that the fire-extinguishing water w may receive a fixed water pressure and be supplied to a water supply pipe by operation of a valve.
[0015]
First, the main 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 drawing. 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 the 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 in 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 portion of the glass bulb 5. When the male screw 42 is gently screwed as it is, the glass valve 5 which is pressed and pressed presses the water stop valve 3 against the valve seat 26 and the water outlet 22 is closed. The magnitude of the pressing force applied to the glass bulb 5 from both sides is adjusted by the screwing depth of the frame 4.
[0016]
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 attached to the ceiling surface with the deflector 6 facing the floor surface and connected to a water supply pipe that has been piped behind the ceiling. For the connection of the sprinkler head 1 to the piped water supply pipe, a hexagon bolt type flange 23 and a mounting screw 21 screwed into the connection port of the water supply pipe are used. In the connected state of the sprinkler head 1, 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 blocked by the water stop valve 3 pressed against the glass valve 5.
[0017]
Here, when a fire occurs, a flame rises due to a convection phenomenon inside the building, and a hot air current flows on the ceiling surface. The flowing hot air current heats the glass bulb 5 of the sprinkler head 1 attached to the ceiling surface. As the glass bulb 5 is heated, the sealing liquid is thermally expanded, and the glass tube is ruptured. And the water stop valve 3 which has closed the valve seat 26 until now receives the pressure of the fire-extinguishing water w in a water supply pipe, and is sprayed off. 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.
[0018]
Most of the fire-extinguishing water w discharged from the water outlet 22 in a solid square shape goes straight toward the deflector 6 and permeates through the gaps of the slits 711, 712... Of all the water spray holes 7 of the water spray hole groups 7a to 7c. After that, water is sprayed directly on the floor surface with a certain spread. Further, the water that travels straight and hits the surface of the deflector 6 is splashed and sprayed mainly from the periphery of the deflector 6 onto the lower floor surface. On the other hand, the fire-extinguishing water w projected on the conical surface of the boss 45 and the inclined surface of the blade portion of the knife-like arm 44 is refracted at each projection surface and the traveling direction is turned.
[0019]
In particular, since the arm 44 is provided in three directions along the vertical surfaces ra, rb, and rc, the extinguishing water w as shown by a two-dot chain line in FIG. The non-transparent band v of a location will arise. A plan view showing the water spray distribution in this case is shown in FIG. FIG. 6 schematically shows the watering distribution of the deflector in which watering holes of the same width are formed in a radial pattern. A fan-shaped non-spraying area A is formed in three directions and the fire extinguishing water w is not sprayed. The non-scattering area A is a projection image corresponding to the non-transmissive band v.
[0020]
On the other hand, in Embodiment 1 of the present invention, as described above, the water spray holes 7 of the disk-shaped deflector 6 are formed as symmetrical water spray hole groups 7a to 7c with the frame yokes 4a to 4c as the center. And the sprinkling hole 7 of each group 7a-7c was comprised by the slits 711,712 ... which have the ridge cross-section 70 parallel to all the hanging 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 and refracts the cross-section 70 of the plurality of water spray holes 7 facing each other. Further, the fire-extinguishing water w refracted on the inclined surface such as the arm 44 also hits the saddle section 70 and is sub-refracted.
[0021]
The turning operation of the fire-extinguishing water w that is refracted and sub-refracted at the cross-section 70 is indicated by arrows w1 and w2 in FIG. As shown in the figure, the fire-extinguishing water w refracted and sub-refracted by hitting the opposite saddle cross-section 70 wraps around the back sides of the respective frame yokes 4a to 4c for each group 7a to 7c. In this way, the sprinkling holes 7 of the groups 7a to 7c prevent the fan-shaped non-spraying area A from being generated for each group based on the non-transmissive band v. The water spray distribution when the non-spreading area A according to Embodiment 1 of the present invention is compensated is shown in FIG. As shown by the density of hatched lines in FIG. 7, there is a difference in sprinkling density between the peripheral part and the central part.
[0022]
Embodiment 2. FIG.
FIG. 8 is an explanatory view showing the configuration of the deflector 6 according to the second embodiment of the present invention, and FIG. 9 is a cross-sectional view corresponding to FIG. In the second embodiment shown in FIGS. 8 and 9, the deflector 6 is formed in an inverted dish shape by bending the outer peripheral portion downward from the vicinity of the circumference of the concentric flat surface portion 62 of the first embodiment. Here, the bending angle θ for forming the deflector 6 into an inverted dish shape is selected to be approximately 10 °. Further, the water spray hole 7 punched out by setting the thickness direction of the deflector 6 is composed of three water spray hole groups 7a, 7b, 7c having a symmetrical structure with the frame yokes 4a, 4b, 4c interposed therebetween. The same as in the first embodiment.
[0023]
The sprinkling holes 7 constituting the sprinkling hole groups 7a, 7b, and 7c are divided into slits 721 having a wide groove width and a wide two-stage structure, a delta-shaped slit 722 having a narrow opening, and a radial cut with a deep cut. It consists of a narrow groove type slit 723. The delta-shaped slit 722 has a vertical cross section on the side of the suspended surfaces ra, rb, and rc, and the other vertical cross section is non-parallel. In particular, the non-parallel side saddle cross section 70 of the delta slit 722 is inclined somewhat upward with respect to the horizontal plane due to the inverted dish-type bending of the deflector 6. Further, symmetrical sprinkling hole groups 7a, 7b, and 7c are formed on both sides with the vertical surface rd passing through the center of the three narrow groove-type slits 723 as a symmetrical surface.
[0024]
Also in the case of the deflector 6 according to the second embodiment, the operation up to the discharge of the fire-extinguishing water w when a fire occurs is the same as that in the first embodiment. However, the deflector 6 of Embodiment 2 is provided with a two-stage slit 721 and a delta slit 722. Therefore, a part of the fire-extinguishing water w discharged from the discharge port 22 and proceeding straight to the deflector 6 passes through the 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 the gap is sprinkled on the floor surface behind the peripheral portions of the frame yokes 4a to 4c. Further, the fire-extinguishing water w that has passed through the deep slit slit 723 is slightly penetrated in the axial direction of the deflector 6 and sprayed.
[0025]
On the other hand, the other part of the fire extinguishing water w that has traveled straight is projected onto the upward cross section 70 of the delta slit 722 to spray the back sides of the frame yokes 4a, 4b, and 4c. In addition, the fire-extinguishing water w refracted by the inclined surfaces of the arm 44 and the boss 45 is also added to the sprinkling of the cross section 70. In particular, since the cross-section 70 has a surface component that is not parallel to the vertical surfaces ra, rb, and rc and faces in the centripetal direction, these water sprays reach the axial center portion directly below the deflector 6. As a result, according to the deflector 6 of the second embodiment, the three types of slits 721 to 723 cooperate to contribute to multi-sided watering, and the fire-extinguishing water w is uniformly spread over a circular wide area. Become. The distribution state of the water spray at this time is shown in FIG.
[0026]
In the first and second embodiments, the case where the number of frame yokes is three has been described as an example. However, the present invention can also be applied to the case where the number of frame yokes is two or four or more. In this case, the number of water spray hole groups is increased or decreased according to the increase or decrease of the number of frame yokes. Further, in the first embodiment, the case where the sprinkling hole group is a flat deflector with a slit having a uniform width has been described as an example. You can also If comprised in this way, the deflector with circular sprinkling distribution like FIG. 10 and high sprinkling density is realizable. Moreover, although the slit which a water spray hole opens in the periphery of a deflector was illustrated and demonstrated, this invention is applicable also to the closed water spray hole without an opening part. Furthermore, the present invention may be applied to a flash type in which a deflector falls and is held by a connecting rod as a connecting member, and the present invention is also applied to a case where the extinguishing water is a fire extinguishing liquid such as a foam aqueous solution. Can do.
[0027]
【The invention's effect】
Even when there is a non-permeation zone that does not allow the extinguishing liquid to permeate due to the connecting member provided with the deflector vertically, no non-spraying area of the extinguishing liquid is generated on the floor. Therefore, the fire-extinguishing liquid released from the water outlet at the same time as the occurrence of the fire can be projected onto the deflector attached to the lower part of the connecting member and sprayed uniformly on the floor surface. Therefore, according to the present invention, it is possible to provide a sprinkler head that is simple in structure and easy to assemble, and can uniformize the water spray distribution of the extinguishing liquid by the deflector 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 showing a configuration of a deflector according to the first embodiment of the present invention.
FIG. 5 is an XX enlarged cross-sectional view 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 showing a configuration of a deflector according to a second embodiment of the present invention.
FIG. 9 is an enlarged cross-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]
1 sprinkler head, 2 body, 3 water stop valve, 4 frame,
4a, 4b, 4c Frame yoke (connection member), 5 Glass bulb,
6 Deflectors, 7 Sprinkling holes, 7a, 7b, 7c Sprinkling hole group, 25 Valve chamber,
21 mounting screw, 22 water outlet, 23 flange, 24 female screw,
26 valve seat, 31 disc, 32 disc spring, 33 valve guide,
34 gasket, 41 annular part, 42 male thread, 43 stud,
44 arms, 45 bosses, 46 holding parts, 47 mounting parts, 61 mounting holes,
62 plane part, 70 cross section, 71 two-stage slit,
72 Delta slit, 73 Slotted slit, A No spray area,
ra, rb, rc, rd vertical surface, v non-transparent band,
w, w1, w2 ... fire extinguishing water (fire extinguishing liquid)

Claims (2)

A sprinkler comprising a deflector having a plurality of slits opened at an outer peripheral edge, a frame yoke attached to the lower end of the deflector and suspended from the main body, and spraying fire extinguishing water discharged from the discharge port of the main body by the deflector In the head
The slit of the deflector below the frame yoke is constituted by a slit having a wide and narrow two-stage configuration having a wide groove width on the opening side,
A portion having a wide groove width of the slit is formed wider than the width of the frame yoke ,
The sprinkler head, wherein the fire-extinguishing water is transmitted through a gap between the frame yoke and the wide portion of the slit . A sprinkler head comprising a deflector having a slit opened at an outer peripheral edge, a frame yoke mounted on the lower end of the deflector and suspended from the main body, and spraying fire extinguishing water discharged from the discharge port of the main body by the deflector In
Below the frame yoke, on both sides of the slit of the deflector, the vertical surface of the vertical surface is parallel to the vertical surface parallel to the frame yoke and the axis of the sprinkler head, and the other cutoff Provide a slit with non-parallel surfaces,
A sprinkler head characterized in that fire fighting water projected on the cross section of the slit is sprinkled on the back side of the frame yoke by tilting the cross section of the non- parallel slit upward with respect to the horizontal plane.

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