JP7536564B2 - Fire extinguishing water head - Google Patents

Description

The present invention relates to a fire extinguishing sprinkler head that is used in fire extinguishing equipment and discharges fire extinguishing liquid.

A fire extinguishing sprinkler head that discharges extinguishing liquid is equipped with a head body having a discharge port, a valve body that closes the discharge port, a deflector that faces the discharge port, a frame that connects the deflector and the head body, and a heat-sensitive valve-opening member that presses the valve body in the valve-closing direction. When the heat-sensitive valve-opening member detects the heat of a fire, it bursts and the valve body falls, and the extinguishing liquid discharged from the discharge port is guided by the deflector and scattered (see, for example, Patent Document 1).

JP 2012-165801 A

Since the extinguishing liquid discharged from the discharge port hits the deflector and is scattered, it is desirable for the extinguishing liquid to hit the deflector evenly.
However, since the deflector is supported by a frame extending from the discharge port side toward the deflector side, the extinguishing fluid discharged from the discharge port is blocked by the frame, and the extinguishing fluid cannot collide with the deflector near the frame, resulting in an uneven spraying of water.

The present invention was made to solve these problems, and aims to provide a fire extinguishing sprinkler head that can spray water evenly without being affected by the frame.

(1) A fire extinguishing sprinkler head according to the present invention comprises a head body having an outlet formed therein for discharging a fire extinguishing liquid, a frame extending downward from the head body, and a deflector provided below the frame so as to face the outlet,
The device is characterized in that it has a straightening tube between the head body and the deflector for straightening the flow of the extinguishing fluid discharged from the discharge port, and the straightening tube is arranged so that its lower end extends toward the deflector beyond the lower end of the frame.

(2) Also, in the above (1), the straightening tube is characterized in that the inner diameter on the deflector side is smaller than that on the head body side.

(3) In addition, in the above (1) or (2), the straightening cylinder has an attachment portion inside the cylinder for directly or indirectly attaching the straightening cylinder to the frame, and the attachment portion is characterized in that it has a support portion extending radially from the inner peripheral wall of the cylinder to the center, and a fixing portion supported at the center of the cylinder by the support portion.

(4) Also, in the above (3), the lower end of the support part is characterized in that it is positioned closer to the discharge port than the center of the height of the flow straightening tube.

(5) Also, in the above (3) or (4), the surface of the support part facing the outlet is curved so that the outlet side is convex.

The fire extinguishing sprinkler head of the present invention has a straightening tube between the head body and the deflector that straightens the extinguishing liquid discharged from the discharge port, and the straightening tube is arranged so that its lower end extends further toward the deflector than the lower end of the frame, thereby correcting unevenness in the extinguishing liquid caused by obstruction by the frame and allowing the extinguishing liquid to collide evenly with the deflector, thereby achieving even sprinkling.

1 is a perspective view of a sprinkler head for fire extinguishing according to an embodiment of the present invention; FIG. FIG. 2 is a vertical cross-sectional view of the fire extinguishing sprinkler head shown in FIG. 1 . FIG. 2 is a perspective view of the flow straightening cylinder shown in FIG. 1 .

The fire extinguishing sprinkler head according to the present embodiment will be described with reference to Figures 1 to 3. In this specification, directions such as up and down refer to directions when the fire extinguishing sprinkler head is attached, and are the same directions as up and down in Figure 2.
As shown in Figures 1 and 2, the fire extinguishing sprinkler head 1 in this embodiment is equipped with a head body 5 having an outlet 3 connected to a piping at the upper side and formed with a discharge port 3 for discharging extinguishing liquid sent from the piping downward in an open state, a frame 7 extending downward from the head body 5, and a deflector 9 provided below the frame 7 opposite the discharge port 3.
The fire extinguishing sprinkler head 1 of this embodiment has a straightening tube 11 between the head body 5 and the deflector 9 for straightening the flow of the extinguishing liquid discharged from the discharge port 3.

The fire extinguishing sprinkler head 1 of this embodiment has a valve body 13 that closes the outlet 3 and a heat-sensitive member 15 that supports the valve body 13, and is a so-called closed type in which the valve body 13 opens and sprays water when the heat-sensitive member 15 is destroyed by heat during a fire. However, the present invention is not limited to the wet type, and also includes a so-called open type that does not have the valve body 13 or heat-sensitive member 15.
Each component will be described in detail below.

<Frame>
The frame 7 is provided so as to branch into two parts and extend downward from the head main body 5, and the two parts are connected at the lower end to form a connecting part 17. The connecting part 17 is provided with a support member 19 that supports the lower end of the heat-sensitive member 15.
Further, below the connecting portion 17, a cylindrical fixed cylinder portion 21 for fixing the flow straightening cylinder 11 and a deflector support body 23 described later is provided.

<Deflector>
The deflector 9 is a disk-shaped member provided opposite the discharge port 3, and has a plurality of radially extending notches 9a formed radially thereon.
The deflector 9 is supported and fixed to the lower end of a cylindrical deflector support body 23 .
A small diameter portion 23 a having a narrower diameter is formed at the upper end of the deflector support 23 , and the small diameter portion 23 a is inserted into a fixed cylindrical portion 21 provided at the lower end of the frame 7 and fixed to the frame 7 .
As shown in FIG. 2 , the cylindrical deflector support 23 is disposed within the flow straightening cylinder 11 , and is provided so that its lower end side extends downward from the flow straightening cylinder 11 .

The outer diameter of the large diameter portion 23b of the deflector support 23 is smaller than the inner diameter of the straightening tube 11, and a gap S is formed between the inner wall of the straightening tube 11 and the outer peripheral surface of the large diameter portion 23b of the deflector support 23, and the extinguishing liquid passes through this gap S to be straightened.

<Flow straightening cylinder>
The straightening cylinder 11 has the function of straightening the flow of the extinguishing liquid discharged from the discharge port 3 and supplying the extinguishing liquid evenly to the deflector 9 .
In order to achieve this function, the flow straightening cylinder 11 is provided so that its lower end extends further toward the deflector 9 than the lower end of the frame 7 .
The extinguishing liquid discharged from the discharge port 3 becomes uneven because a part of it is blocked by the frame 7, but thereafter, it is straightened by flowing through the straightening tube 11, and collides with the deflector 9 in a uniform state.

As shown in FIGS. 2 and 3, the flow straightening cylinder 11 has an attachment portion 25 therein for attaching the flow straightening cylinder 11 directly or indirectly to the frame 7.
Indirect attachment to the frame 7 refers to a case in which the flow straightening cylinder 11 is attached to the frame 7 via a separate member.

The mounting portion 25 includes a support portion 27 that extends radially from the inner peripheral wall of the cylinder toward the center, and a cylindrical fixing portion 29 that is supported at the center of the cylinder by the support portion 27 .
By providing such a mounting portion 25, it becomes easier to align the flow straightening tube 11 with the outlet port 3.
Further, a locking portion 31 that locks with the frame 7 is provided on the upper edge of the straightening cylinder 11, and by locking with the frame 7, the straightening cylinder 11 is positioned and prevented from rotating.

The hole diameter of the cylindrical fixing portion 29 of the straightening cylinder 11 is smaller than the large diameter portion 23 b of the deflector support body 23 .
The fixed cylinder portion 21 provided at the lower end of the frame 7 is inserted into the hole of the cylindrical fixing portion 29 of this straightening cylinder 11, and in this state, the small diameter portion 23a of the deflector support body 23 is inserted into the fixed cylinder portion 21. As a result, the cylindrical fixing portion 29 of the straightening cylinder 11 is clamped between the upper end of the large diameter portion 23b of the deflector support body 23 and the frame 7, and the straightening cylinder 11 is fixed to the frame 7 (see FIG. 2).

The surface of the support part 27 of the flow straightening cylinder 11 on the discharge port 3 side is curved so that the discharge port 3 side is convex (see the A-A cross section of FIG. 3). This has the effect of reducing turbulence of the extinguishing liquid discharged from the discharge port 3.
In addition, as shown in the A-A cross-sectional view of Figure 3, the width of the support part 27 narrows downward, which has the effect of reconcentrating the extinguishing water that separates at the upper part of the support part 27 at the lower side, preventing turbulence of the extinguishing water and enabling more straightened extinguishing water to be supplied to the deflector.

The upper end surface of the cylindrical fixing part 29 of the straightening tube 11 is formed with an inclined surface part 29a (see FIG. 3) that slopes downward and outward. By providing the inclined surface part 29a, it is possible to reduce turbulence of the extinguishing liquid discharged from the discharge port 3, similar to the surface of the support part 27 on the discharge port 3 side described above.

It is desirable that the lower end of the support portion 27 be disposed closer to the discharge port 3 than the center of the height direction of the flow straightening cylinder 11 .
With this arrangement, the distance that the extinguishing liquid passes through inside the cylinder after passing through the support portion 27 becomes longer, so that the effect of rectifying the flow of the extinguishing liquid can be improved.

In addition, it is desirable that the flow straightening cylinder 11 has a shape in which the inner diameter on the deflector 9 side is smaller than that on the discharge port 3 side.
Since the extinguishing liquid tends to spread after leaving the straightening tube 11, the straightening tube 11 is shaped so that the diameter thereof decreases toward the bottom, thereby preventing the extinguishing liquid from spreading and allowing the extinguishing liquid to collide effectively with the deflector 9.
As a mode of the diameter reduction, it is more preferable that the inner diameter of the flow straightening cylinder 11 is tapered so that the inner diameter gradually decreases downward.

The gap distance between the bottom end of the straightening tube 11 and the deflector 9 affects the throw distance of the water spray. For example, shortening the gap distance increases the throw distance, and lengthening the gap distance decreases the throw distance. Therefore, by adjusting the length of the straightening tube 11, the throw distance can be optimized for the installation site. The gap distance can be adjusted by adjusting the length of the straightening tube 11 itself, as well as by adjusting the mounting position of the straightening tube 11 and the frame 7.

The operation of the fire extinguishing sprinkler head 1 of this embodiment configured as above will now be described.
When the heat-sensitive member 15 is destroyed by the heat of the fire, the valve body 13 opens and the extinguishing liquid is discharged from the discharge port 3 downwards of the frame 7.
Almost the entire amount of the extinguishing liquid discharged downward from the frame 7, including the portion blocked by the frame 7, enters the straightening cylinder 11. By entering the straightening cylinder 11, the extinguishing liquid, including the portion blocked by the frame 7, is straightened within the straightening cylinder 11 and discharged toward the deflector 9.
The rectified extinguishing liquid collides evenly against the deflector 9, thereby achieving even spraying.

In addition, there are support parts 27 arranged radially inside the straightening cylinder 11, where the extinguishing liquid is blocked and disturbed. However, since the straightening cylinder 11 extends further below the lower end of the support parts 27, the liquid is straightened again inside the cylinder, and the extinguishing water collides with the deflector 9 in an even state.
In addition, since the upper surface of the support portion 27 is a curved surface that is convex upward, this has the effect of suppressing disturbance of the extinguishing liquid when the extinguishing liquid collides with the support portion 27.
Furthermore, since the support portion 27 narrows toward the bottom, as described above, the extinguishing water that separates at the top of the support portion 27 can be reconcentrated at the bottom, and more straightened extinguishing water can be supplied to the deflector.

As described above, according to this embodiment, the provision of the straightening tube 11 corrects the uneven distribution of the extinguishing liquid caused by the obstruction of the frame 7, allowing the extinguishing liquid to collide evenly with the deflector 9, achieving even spraying.

In the above embodiment, the mounting structure of the flow straightening tube 11 to the frame 7 is such that a mounting portion 25 is provided inside the flow straightening tube 11, but the mounting structure of the flow straightening tube 11 to the frame 7 of the present invention is not limited to this.
For example, if a male thread is formed on the outer peripheral surface of the lower end of the frame 7 and a female thread is formed on the inner peripheral surface of the upper end of the straightening tube 11, and the two are screwed together, the support part 27 can be eliminated. If the support part 27 is not required, it is possible to suppress turbulence of the extinguishing water. In addition, if the above-mentioned screw mounting structure is used, it is also effective in facilitating adjustment of the gap distance between the lower end of the straightening tube 11 and the deflector 9 described above.

REFERENCE SIGNS LIST 1 Fire extinguishing sprinkler head 3 Discharge port 5 Head body 7 Frame 9 Deflector 9a Notch 11 Flow straightening tube 13 Valve body 15 Heat-sensitive member 17 Connecting portion 19 Support member 21 Fixed tube portion 23 Deflector support body 23a Small diameter portion 23b Large diameter portion 25 Mounting portion 27 Support portion 29 Cylindrical fixed portion 29a Inclined surface portion 31 Locking portion S Gap

Claims (4)

A fire extinguishing sprinkler head comprising a head body having an outlet formed therein for discharging a fire extinguishing liquid, a frame extending downward from the head body, and a deflector provided below the frame so as to face the outlet,
a straightening cylinder for straightening the flow of the extinguishing liquid discharged from the discharge port between the head body and the deflector, the straightening cylinder being provided such that a lower end of the straightening cylinder extends toward the deflector beyond a lower end of the frame ;
A fire extinguishing sprinkler head characterized in that the straightening tube has an attachment portion inside the tube for attaching it directly or indirectly to the frame, and the lower end of the attachment portion is positioned closer to the discharge outlet than the height center of the straightening tube . The fire extinguishing sprinkler head according to claim 1, characterized in that the straightening tube has an inner diameter that is smaller on the deflector side than on the head body side. A fire extinguishing sprinkler head as described in claim 1 or 2, characterized in that the mounting portion comprises a support portion extending radially from the inner wall of the cylinder to the center, and a fixed portion supported at the center of the cylinder by the support portion. The fire extinguishing sprinkler head according to claim 3, characterized in that the surface of the support part facing the outlet is curved so that the outlet side is convex.

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