Sprinkling reflector of sprinkler head

Abstract

To provide a sprinkling reflector of a sprinkler head capable of stably obtaining an amount of sprinkled water on a back side of a support member for supporting a deflector.SOLUTION: A sprinkling reflector 1 of a sprinkler head is provided on a sprinkler head 3 including a deflector 7 and disposed above the deflector 7 to face the deflector 7, the sprinkling reflector includes an attachment part 11 for attachment to the sprinkler head 3, a reflection surface 13 continuous with the attachment part 11 and extending in a radial direction of the deflector 7 in an attached state, and a pair of side walls 15 extending downward from portions of both side edges of the reflection surface 13.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a sprinkler head having a deflector, and relates to a water spray reflector that is provided on the sprinkler head and assists the deflector in uniformly spraying fire extinguishing water. [Background technology]

[0002] Sprinkler heads sense the heat of a fire and spray water to extinguish it. Conventional sprinkler heads are equipped with a deflector that collides the water discharged from the nozzle and distributes it evenly in the circumferential direction, ensuring a predetermined distribution of water.

[0003] In a frame-type sprinkler head, a horseshoe-shaped frame is provided as a support member for supporting the deflector. The frame is formed so that two arms extend downward from the lower end of the head body which has the water outlet, and a deflector is supported at the lower end of the frame so as to face the water outlet at a predetermined distance.

[0004] The extinguishing water discharged from the water outlet of the head body hits the deflector and is guided by the deflector toward the outer edge, but because the above-mentioned frame is erected on the surface of the deflector, some of the extinguishing water is blocked by the frame before reaching the deflector.

[0005] Therefore, it was difficult for fire extinguishing water to reach the back side of the frame when viewed from the water outlet (hereinafter simply referred to as the "back side of the frame"), and as a result, the amount of water sprayed in the direction corresponding to the back side of the frame was less than the amount of water sprayed in other directions.

[0006] Therefore, in order to ensure that a sufficient amount of water is sprayed on the back side of the frame, in Patent Document 1, a spray reflector plate with approximately the same width as the frame is provided between the deflector and the frame so as to face the deflector.

[0007] The fire extinguishing water that hits the deflector is dispersed circumferentially toward the outer periphery of the deflector, but some of it hits the frame and splashes upward along the back surface of the frame. By providing a sprinkler reflector, the fire extinguishing water heading upward collides with the underside of the sprinkler reflector, and is redirected and splashed onto the rear side of the frame. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-46544 Summary of the Invention [Problem to be solved by the invention]

[0009] As described above, by providing a water spray reflector on a sprinkler head with a deflector, it is possible to spray sufficient fire extinguishing water on the back side of the support member (frame) that supports the deflector. However, even if a water spray reflector is provided, the amount of water sprayed on the back side of the support member may not be stable, which makes it difficult to achieve a uniform water spray distribution.

[0010] The present invention has been made to solve the above-mentioned problems, and aims to provide a sprinkler head water spray reflector that can obtain a stable amount of water sprayed on the back side of the support member that supports the deflector. [Means for solving the problem]

[0011] (1) The sprinkler head water sprinkler reflector of the present invention is provided on a sprinkler head equipped with a deflector, and is disposed above the deflector so as to face the deflector, It is characterized by having an attachment portion for attachment to the sprinkler head, a reflective surface portion that is continuous with the attachment portion and extends radially of the deflector when attached, and a pair of side wall portions that extend downward from part of both side edges of the reflective surface portion.

[0012] (2) In the device described in (1) above, the side wall portion is provided on the end side including the tip of the reflecting surface portion.

[0013] (3) In the above (1) or (2), the reflecting surface portion has an inclined piece portion that rises from the mounting portion at an angle, and a horizontal piece portion that is continuous with the inclined piece portion and has a gentler inclination angle than the inclined piece portion, The side wall portion is characterized by being provided on the horizontal piece portion. [Effects of the Invention]

[0014] In the present invention, by providing a pair of side walls extending downward from a portion of both side edges of the reflecting surface portion, a stable amount of water can be sprayed on the back side of the support member that supports the deflector. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 2 is a perspective view showing a water sprinkler reflector of the sprinkler head according to the embodiment. [Figure 2] 2(a) is a front view of the sprinkling reflector plate of FIG. 1, FIG. 2(b) is a side view, and FIG. 2(c) is a bottom view. [Figure 3] FIG. 2 is a perspective view of a sprinkler head to which the water spray reflector of FIG. 1 is attached. [Figure 4] FIG. 4 is a front view of the sprinkler head of FIG. 3. [Figure 5] FIG. 4 is a side view of the sprinkler head of FIG. 3. [Figure 6] FIG. 6 is a cross-sectional view taken along the line AA in FIG. 5. DETAILED DESCRIPTION OF THE INVENTION

[0016] A sprinkler head water sprinkler reflector 1 (hereinafter simply referred to as "water sprinkler reflector 1") according to one embodiment of the present invention will be described with reference to FIGS. 1 and 2 show the water sprinkler reflector 1 alone, with FIG. 1 being a perspective view, FIG. 2(a) being a front view, FIG. 2(b) being a side view, and FIG. 2(c) being a bottom view. 3 to 6 show the sprinkler reflector 1 of FIGS. 1 and 2 attached to the sprinkler head 3, with FIG. 3 being an oblique view, FIG. 4 being a front view, FIG. 5 being a side view, and FIG. 6 being a cross-sectional view taken along the line AA in FIG. 5. Prior to describing the sprinkler reflector 1 of this embodiment, a brief description will be given of the sprinkler head 3 to which the sprinkler reflector 1 is attached.

[0017] As shown in Figures 3 to 6, the sprinkler head 3 includes a head body 5 having a water discharge outlet 5a (see Figure 6), a deflector 7 facing the water discharge outlet 5a, and a horseshoe-shaped frame 9 connecting the deflector 7 and the head body 5.

[0018] There are two types of sprinkler heads 3: closed sprinkler heads and open sprinkler heads.In the case of closed sprinkler heads, in addition to the above, a valve body that blocks the water discharge outlet 5a and a heat-sensitive valve-opening member (e.g., a glass valve) that presses the valve body in the valve closing direction are provided. In a closed-type sprinkler head, if the heat-sensitive valve opening member is damaged by the heat of a fire, the force pressing the valve body in the valve closing direction is lost, the valve body falls, and fire extinguishing water is discharged from the water outlet 5a. At this time, the situation is similar to that shown in Figures 3 to 6.

[0019] As mentioned above, when extinguishing water is discharged from the water outlet 5a, it hits the frame 9 and is divided into left and right sides of the frame 9, making it difficult for the water to reach the rear side of the frame 9. Even if the water does reach the rear side of the frame 9 from the left and right sides, some of the water will splash upward along the rear side of the frame 9, so the amount of water sprayed on the rear side of the frame 9 is likely to be less than other parts.

[0020] Therefore, the deflector 7 of the sprinkler head 3 has a shape in which the portion corresponding to the rear side of the frame 9 is inclined downward more than the other portions. This makes it easier for the fire extinguishing water to flow into that portion and collect on the rear side of the frame 9.

[0021] The sprinkler reflector 1 of this embodiment is provided on the sprinkler head 3 to assist the deflector 7 in uniformly spraying water, and specifically has the following configuration.

[0022] As shown in Figures 1 and 2, the sprinkler reflector 1 of this embodiment comprises an attachment portion 11 that is attached to the sprinkler head 3, a pair of reflective surface portions 13 that are continuous with the attachment portion 11 and extend on both sides of the attachment portion 11, and a pair of side wall portions 15 that extend downward from a portion of each side edge of the reflective surface portion 13. The sprinkler reflector 1 is a member formed by bending a plate material, and its length in the longitudinal direction is set to be approximately the same as the diameter of the deflector 7.

[0023] <Mounting part> The mounting portion 11 is a ring-shaped portion formed in the center of the sprinkler reflector 1, and this portion is fixed to the deflector 7, the frame 9, the connection portion between the deflector 7 and the frame 9, etc., so that the sprinkler reflector 1 is attached to the sprinkler head 3. In this embodiment, as shown in Figure 4 or Figure 6, the mounting portion 11 is fixed in contact with the upper surface of the deflector 7, but the position at which the mounting portion 11 is fixed is not limited to this, and the mounting portion 11 may be fixed to the frame 9 without contacting the deflector 7.

[0024] <Reflective surface> The reflective surface portion 13 changes the direction of travel of the fire extinguishing water by causing it to collide with the fire extinguishing water that bounces off the deflector 7 and splashes upward, or the fire extinguishing water that splashes upward along the back surface of the frame 9.When installed, the reflective surface portion 13 extends radially from the deflector 7 and is positioned above the deflector 7 so as to face the deflector 7.

[0025] The reflecting surface portion 13 has an inclined piece portion 17 that rises at an angle from the mounting portion 11, and a horizontal piece portion 19 that is continuous with the inclined piece portion 17 and has a gentler inclination angle than the inclined piece portion 17. As shown in Figure 5, the width of the inclined piece portion 17 and the horizontal piece portion 19 is set to be approximately the same as the thickness of the frame 9. In the attached state, the lateral piece portion 19 faces the deflector 7 (specifically, the portion inclined downward relative to the other portions).

[0026] As shown in the figure, it is preferable to set the inclination angle of the inclined piece portion 17 so that it contacts the back surface of the frame 9 when installed, as this maximizes the size of the inlet 21 (see Figure 4) for fire extinguishing water to flow into the underside of the reflective surface portion 13.

[0027] Furthermore, the side piece portion 19 is disposed above the deflector 7 so as to extend substantially horizontally in the radial direction of the deflector, but the horizontality can be appropriately set as necessary. For example, the side piece portion 19 may be formed so as to be parallel to the mounting portion 11 so that the side piece portion 19 extends horizontally in the mounted state, or as shown in Fig. 2(a), the side piece portion 19 may be formed so as to be inclined at an angle of about 8° relative to the mounting portion 11 so that the side piece portion 19 is inclined slightly upward from the horizontal in the mounted state.

[0028] <Side wall> The side wall portion 15 is formed at the tip of the reflecting surface portion 13, specifically at the end side including the tip of the horizontal piece portion 19, and extends downward from both side edges of the horizontal piece portion 19. As described above, in this embodiment, the side wall portion 15 is provided only at the tip portion, not along the entire length of the reflective surface portion 13, in order to prevent the side wall portion 15 from obstructing the flow of fire extinguishing water under the reflective surface portion 13.

[0029] If the side wall portion 15 were provided along the entire length of the reflective surface portion 13, the fire extinguishing water would collide with the outer surface of the side wall portion 15, making it difficult for the fire extinguishing water to flow under the reflective surface portion 13, which would reduce the amount of water sprayed on the back side of the frame 9, which is not desirable. Therefore, the side wall portion 15 is provided only on a part of the reflecting surface portion 13 so that the fire extinguishing water can flow sufficiently below the reflecting surface portion 13. In particular, since the fire extinguishing water flows from the center of the sprinkler head 3, it is preferable not to provide a side wall portion 15 on the side closer to the center, but to provide a side wall portion 15 on the end side including the tip of the reflective surface portion 13.

[0030] The angle formed between the horizontal piece 19 and the side wall 15 (90° in this embodiment) and the wall height of the side wall 15 can be set appropriately depending on the thickness of the frame 9, the shape of the deflector 7, etc.

[0031] Next, the operation of the sprinkling reflector plate 1 of this embodiment configured as described above will be described. When the heat of the fire opens a valve (not shown), fire extinguishing water is discharged downward from the water discharge port 5a. Some of the fire extinguishing water discharged from the water discharge port 5a hits the frame 9, and the rest hits the deflector 7.

[0032] The fire extinguishing water that hits the deflector 7 is dispersed in the circumferential direction of the deflector 7 and splashes toward the outer peripheral edge of the deflector 7. On the other hand, the fire extinguishing water that hits the frame 9 is divided into the left and right sides of the frame 9, flows downward along the surface of the frame 9, and hits the deflector 7. Then, part of this fire extinguishing water bounces back and flows under the reflective surface 13 from between the inclined piece 17 and the side wall 15 of the water spray reflector 1.

[0033] A part of the fire extinguishing water that flows under the reflecting surface portion 13 flows upward along the inclined piece portion 17, and the rest is guided by the deflector 7 and splashes from the outer peripheral edge portion of the deflector 7. The fire extinguishing water that flows upward along the inclined piece 17 changes direction along the horizontal piece 19 that is continuous with the inclined piece 17 in the direction in which the horizontal piece 19 extends, and flows toward the tip of the horizontal piece 19.

[0034] Here, the fire extinguishing water heading toward the tip of the horizontal piece 19 is divided into water that reaches the tip of the horizontal piece 19 and water that reaches the side edge of the horizontal piece 19. The fire extinguishing water that reaches the tip of the horizontal piece 19 splashes in the direction in which the horizontal piece 19 extends, that is, toward the back side of the frame 9. Furthermore, the fire extinguishing water that reaches the side edge of the horizontal piece 19 collides with the side wall 15 and is changed in its direction of travel, and splashes in the direction in which the horizontal piece 19 extends, i.e., toward the back side of the frame 9 .

[0035] In conventional water spray reflectors that did not have side wall portions 15, some of the fire extinguishing water heading toward the tip of the horizontal piece portion 19 could splash off the side edge of the horizontal piece portion 19, which reduced the amount of water sprayed on the back side of the frame 9. In this regard, in this embodiment, by providing a side wall portion 15 at the tip of the horizontal piece portion 19, splashing from both side edges of the horizontal piece portion 19 is suppressed, thereby increasing the amount of water sprayed in the direction in which the horizontal piece portion 19 extends.

[0036] As described above, the water spray reflector 1 of this embodiment is provided with a pair of side wall portions 15 extending downward from part of both side edges of the horizontal piece portion 19, thereby increasing the amount of water sprayed in the direction in which the horizontal piece portion 19 extends. Therefore, the sprinkler head 3 equipped with the water spray reflector 1 of this embodiment can stably spray fire extinguishing water also onto the back side of the frame 9 supporting the deflector 7, thereby making it possible to stably obtain a uniform water spray distribution.

[0037] The sprinkler reflector 1 described in the above embodiment is an example of the present invention, and does not limit the shape of the mounting portion or reflective surface portion, the number of reflective surface portions, or the position at which the sprinkler reflector is mounted on the sprinkler head. For example, a plurality of members each having a single reflecting surface portion on a ring-shaped mounting portion may be combined and used, or the mounting portion may have a shape other than a ring-shaped plate.

[0038] Furthermore, when the mounting portion is fixed in contact with the deflector, it is necessary to provide an inclined piece portion to set a predetermined distance between the horizontal piece portion and the deflector, but this is not the case when the mounting portion is fixed at a position away from the deflector. For example, the mounting portion may be fixed to the rear surface of the frame, and in that case, the horizontal piece may be formed continuously from the mounting portion. [Explanation of symbols]

[0039] 1. Sprinkler head reflector 3 sprinkler heads 5 Head body 5a Water outlet 7 Deflector 9 frames 11 Mounting part 13 Reflective surface section 15 Side wall 17 Inclined piece 19 Horizontal piece 21 Inlet

Claims

1. A sprinkler head having a deflector, the water sprinkler reflector being disposed above the deflector and facing the deflector, A sprinkler head water spray reflector characterized by having a mounting portion for mounting to the sprinkler head, a reflective surface portion that is continuous with the mounting portion and extends radially of the deflector when mounted, and a pair of side wall portions that extend downward from part of both side edges of the reflective surface portion.

2. 2. The sprinkler head according to claim 1, wherein the side wall portion is provided on an end side including a tip of the reflecting surface portion.

3. the reflecting surface portion has an inclined piece portion that rises at an incline from the mounting portion, and a horizontal piece portion that is continuous with the inclined piece portion and has an inclination angle that is gentler than the inclined piece portion, 3. The water sprinkler reflector of claim 1, wherein the side wall portion is provided on the horizontal piece portion.

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