JP3905940B2 - Water discharge type head - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sprinkler head, particularly a water discharge type head, which extinguishes fire by spraying water when a fire occurs.
[0002]
[Prior art]
As a sprinkler head for fire fighting, there are a closed type head and a water discharge type head, and the water discharge type head includes an open type head.
[0003]
The closed type head has a valve seat formed at the water outlet of the main body, the valve body is installed in a watertight state on the normal time valve seat, and the thermal decomposition portion holds the valve body. When this fire broke out, the thermal decomposition part was decomposed by the heat of the fire, and the valve body held by the thermal decomposition part dropped to open the valve seat, and the pipe was filled. It is designed to spray water. Therefore, the closed head is extremely effective for initial fire extinguishing because the thermal decomposition part senses and decomposes fire heat quickly. This closed head is attached to a general high-rise building or a place where many people gather, such as office buildings, department stores, condominiums, and underground malls.
[0004]
By the way, there is a concern that it is difficult to perform effective initial fire extinguishing even if the closed type head is attached to a high ceiling in a building, for example, an atrium ceiling, a covered stadium, a theater seat. This is because even if the closed head is attached to the high ceiling, if a fire occurs in this building, it takes time until the heat of the fire reaches the ceiling and the closed head is operated.
[0005]
A system using an open-type head is effective in the initial fire extinguishing of a fire generated in such a high ceiling building. The water spray from the open head is performed by detecting a fire with a highly sensitive fire detector installed on the ceiling. That is, when a fire detector installed separately detects a fire, the signal is sent to the control panel, and an operation command is issued from the control panel to the pump of the water storage tank. When the pump of the water storage tank is operated, the water in the water storage tank is sent to a pipe, and water is sprayed from an open type head attached to the pipe to extinguish the fire. In the open type head, a valve element is not installed at the water outlet of the main body, and the pipe to which the open type head is attached is not filled with water. Therefore, the water flowing through the pipe is immediately sprayed from the open type head.
[0006]
There are a frame yoke type and a multi type as the types of the open type head. In the frame yoke type, a horseshoe-shaped frame yoke protrudes from both sides of a water flow port, and a plate-like deflector having a large number of blades formed at the lower end of the frame yoke is installed. This frame yoke type is not only bad in appearance because the frame yoke protrudes greatly, but also over time, this greatly protruding frame yoke and deflector will have spider webs and debris attached to it and the appearance will be further deteriorated It was something to do.
[0007]
The multi type is a large-diameter main body having a water outlet and a bowl-shaped deflector installed therein. As shown in FIG. 8, a conventional multi-type open type head has a plurality of sprinkling holes S arranged in parallel in a ring-shaped deflector W, and when the fire is extinguished, The water that flowed out from the water was sprayed in all directions from many water holes. This multi type is superior in design in that it does not have a large projecting portion like the frame yoke type, so that spider webs, dust, etc. are not easily attached, and the appearance seen from below is good. Therefore, a multi-type head is often used as an open-type head attached to the ceiling today.
[0008]
By the way, in the open type head, whether it is a frame yoke type or a multi type, a predetermined amount of water must be uniformly sprayed within a certain time over a certain area on the floor. The water discharge amount in the conventional open type head is generally 80 l / min. However, in order to perform sprinkling effective for initial fire extinguishing with this water discharge amount, the conventional open type head inevitably has a narrow mounting interval on the ceiling, and therefore the number of mountings must be increased.
[0009]
The work of attaching an open head to a high ceiling is not only very troublesome but also dangerous. In other words, the installation of the open head to the low ceiling was easy with a stepladder or simple scaffolding, but the installation of the open head to the high ceiling was built with a sturdy scaffold near the high ceiling, Because it was forced to climb up and down and to be in high places, it required a lot of physical and mental labor for the workers.
[0010]
Therefore, in recent years, it has been considered to reduce the number of open-type heads attached in order to reduce the number of open-type heads attached to the high ceiling and reduce the labor of the operator. For this purpose, it is necessary to increase the amount of water discharged from one open-type head so that wide-area spraying can be performed. An open type head that secures a wide protection area by increasing the amount of water discharged per piece in this way is particularly called a water discharge type head here.
[0011]
[Problems to be solved by the invention]
By the way, a test was conducted in which the open type head was made to be a water discharge type head by spreading the inlet and deflector of the conventional multi type open type head. I could not. In other words, in the conventional multi-type water discharge type head, the water spray distribution is as if it is a gear shape as shown in FIG. 9, and a large amount of water is scattered radially in the direction of the gear crest (A), The portion (B) was non-uniformly sprayed with a small amount of water spray. Furthermore, the amount of water sprayed is also small at C (inside the one-dot chain line) directly below the water discharge head and outside D (inside the two-dot chain line) in the vicinity thereof, and if a fire occurs at these C and D, fire extinguishing is significantly delayed. There was a problem. The present invention provides a multi-type water discharge type head that can perform uniform spraying over the entire required spray area without forming a large amount of spray area in a radial manner or reducing the amount of water sprayed below the attachment part of the water discharge type head. It is in.
[0012]
[Means for Solving the Invention]
As a result of earnestly examining the cause of non-uniform spraying in the conventional multi-type water discharge type head of wide area spraying, the present inventor found that the water flowing out from the sprinkling holes arranged in parallel to the deflector is Since it is spread in a similar shape and sprayed, the part sprayed from the sprinkling holes becomes a part where the spraying density is radially high, and no water is sprayed or sprayed in the spraying area between the sprinkling holes and the adjacent sprinkling holes. Even if it was found, it was found to be less than the part sprayed in a similar shape.
[0013]
In view of this, the present invention provides a uniform spray over a wide area by further forming a spray hole in the deflector that compensates for the amount of water sprayed between the spray holes and allowing the spray hole to be sprayed in the center of the spray area. The present invention was completed by paying attention to the possibility.
[0014]
The present invention relates to a multi-type water discharge head in which a large number of water spray holes formed in a bowl-shaped deflector are arranged in a ring and the deflector is installed in a main body having a water outlet. A large number of sprinkling holes are drilled in a plurality of upper and lower stages, and each of the sprinkling holes in the plurality of upper and lower stages is drilled at a position that can compensate each other for insufficient spraying. This is a water discharge type head.
[0015]
In the present invention, a large number of sprinkling holes drilled in an annular shape must be arranged in a plurality of stages, that is, at least two or more stages in parallel. The sprinkling holes arranged in parallel in a plurality of stages must be drilled at positions that can compensate for the shortage of the sprinkling amount from the upper and lower sprinkling holes.
[0016]
The position where the amount of water spray from each of the upper and lower water spray holes can be compensated for is, for example, when the water spray holes arranged in a ring are two-stage upper and lower, a large number of water holes arranged in the lower ring (hereinafter referred to as the water spray holes). The lower sprinkling holes) must be capable of spraying to make up for the shortage of spraying areas of a large number of sprinkling holes arranged in the upper ring (hereinafter referred to as the upper sprinkling holes).
[0017]
Assuming that the upper sprinkling holes have a radial dispersal function, the lower sprinkling holes can be sprayed in areas where the amount of sprinkling between the radial sprinkling areas of the upper sprinkling holes is small, and can also be sprayed in the center of the spraying area. . For this purpose, the lower sprinkling holes are not only staggered in the vertical direction with respect to the upper sprinkling hole drilling positions, or the lower sprinkling holes are further disposed at appropriate positions. May be drilled.
[0018]
In addition, in order to adjust the amount of water sprayed from the upper water spray hole and the lower water spray hole, a uniform spray can be performed by installing a flow rate adjusting plate between the upper water spray hole and the lower water spray hole inside the deflector.
[0019]
For example, if the water spray area is within 15m in diameter, it can be sprayed uniformly over the entire area just by arranging the water spray holes in multiple upper and lower stages. In this case, the sprinkling holes may not be sufficiently sprayed below the attachment position of the water discharge type head by simply arranging the sprinkling holes in parallel. In such a case, if a jet outlet is provided at the center of the deflector, it can be sufficiently sprayed below the attachment position of the water discharge type head. The jet outlet is suitable to have a turning mechanism.
[0020]
【Example】
The present invention will be specifically described below with reference to the drawings. 1 is a front view of a multi-type water discharge head of the present invention, FIG. 2 is a perspective view thereof, FIG. 3 is a front sectional view thereof, and FIG. 4 is a front sectional view in which a flow rate adjusting plate is installed inside a deflector. FIG. 6 is a front view in which a jet port is provided at the center of the deflector, FIG. 6 is a front sectional view of the same, and FIG. 7 is a partially enlarged perspective view of the main part.
[0021]
The multi-type water discharge type head of the present invention includes a main body 1 and a deflector 2. The main body 1 has a flowing water port 3 formed in the center, and an attachment screw 4 for attaching to a pipe (not shown) is screwed on the outside thereof. A flange 5 is formed at the lower part of the main body 1, and a male screw 6 is screwed around the outer periphery of the flange.
[0022]
The deflector 2 has a bowl-like shape having a step 7, and a female screw 8 is screwed on the upper portion, and the female screw is attached to the main body 1 by screwing with the male screw 6 of the flange 5 of the main body. It has been. In the deflector 2, a large number of water spray holes (upper water spray holes) 9 are arranged in a ring shape from the step 7 to the upper side thereof. In addition, a large number of water spray holes (lower water spray holes) 10 are arranged in a ring shape below the step 7.
[0023]
The position where the lower water sprinkling hole 10 is drilled with respect to the upper water sprinkling hole 9 is located between the upper water sprinkling hole 9 and the adjacent upper water sprinkling hole 9. That is, in the water discharge type head of the embodiment, the upper water sprinkling holes and the lower water sprinkling holes are formed so as to be in alternate positions.
[0024]
As a result of watering at a water spraying rate of 1,000 l / min in the water spraying type head of the present invention having a diameter of 10 m, water spraying was performed uniformly throughout the required watering area. When water was sprayed in the same watering area with the same watering amount as above with a conventional water discharge type head, the watering distribution was radially uneven.
[0025]
In the present invention, in order to adjust the watering amount of each of the upper watering hole and the lower watering hole, a flow rate adjusting plate 11 can be installed inside the deflector 2 as shown in FIG. The flow rate adjusting plate 11 is installed between the upper water sprinkling hole 9 and the lower water sprinkling hole 10, and has a hole 12 in the center. The flow rate can be adjusted by adjusting the size of the hole 12. That is, the hole 12 is made larger when the amount of water sprayed from the lower water sprinkling hole 10 is increased, and conversely, the hole 12 is made smaller when the amount of water sprayed from the upper water sprinkling hole 9 is increased.
[0026]
Next, a water discharge type head suitable for spraying an ultra-wide water spray area having a diameter of 15 m or more will be described.
[0027]
Since the water discharge type head for spraying the super wide water spray area may not be sufficiently sprayed below the water discharge head mounting portion in the water discharge head as shown in FIGS. 1 to 4, it is preferable to install the jet outlet 13 at the center of the deflector.
[0028]
Here, a water discharge type head suitable for spraying in a very wide water spray area will be described with reference to FIGS. The same parts as the water discharge type head described above are denoted by the same reference numerals, and the description thereof is omitted.
[0029]
A spout 13 is installed at the center of the deflector 2. As shown in FIG. 7, three holes 14 are formed in the ejection port, and the holes are twisted in the same direction. Accordingly, since water is jetted from the jet outlet while swirling, water is sprayed also in the central portion of the water spray area below the water discharge type head mounting portion.
[0030]
In addition, here, it is description about the water discharge type | mold head requested | required by the present sprinkler system corresponding to a high ceiling, and assumes an open type head. However, if a highly sensitive thermal decomposition part is developed in the closed type head in the future, the deflector part of the water discharge type head of the present invention can be used for the closed type head.
[0031]
【The invention's effect】
As described above, the water discharge type head according to the present invention compensates for the lack of watering of the upper watering hole, and the lower watering hole compensates for it. Can be sprayed. Therefore, the water discharge type head according to the present invention has not only a great effect on initial fire extinguishing even if a fire breaks out under the water discharge type head mounting part, but also can reduce the number of attachments to a high ceiling. It is excellent in economic efficiency and safety that it is extremely effective in reducing the labor required for this.
[Brief description of the drawings]
1 is a front view of a water discharge type head of the present invention. FIG. 2 is a perspective view of a water discharge type head of the present invention. FIG. 3 is a front sectional view of a water discharge type head of the present invention. FIG. 5 is a front sectional view of the water discharge type head of the present invention provided with a plate. FIG. 5 is a front view of the water discharge type head of the present invention provided with a jet outlet in the center of the deflector. FIG. 8 is a perspective view of a conventional multi-type water discharge type head. FIG. 9 is an explanatory view of water spray distribution in a conventional multi-type water discharge type head.
1 Body 2 Deflector 3 Flowing Port 4 Mounting Screw 5 Flange 6 Male Screw 7 Step 8 Female Screw 9 Upper Sprinkling Hole 10 Lower Sprinkling Hole

Claims (4)

A multi-type water discharge type head in which a large number of sprinkling holes drilled in a bowl-shaped deflector are arranged in a ring and the deflector is installed in a main body having a water outlet. with nozzle holes of are drilled vertically multiple stages, each of the nozzle holes of the upper and lower multiple stages, it is bored at a position where each can compensate for the spraying lack of mutual upper nozzle holes of the interior of the deflector A water discharge type head characterized in that a flow rate adjusting plate is installed between the water spray hole and the lower water sprinkling hole . 2. The water discharge type head according to claim 1, wherein the sprinkling holes arranged in parallel in the plurality of upper and lower stages have staggered positions in the vertical direction. 2. The water discharge type head according to claim 1, wherein the watering holes arranged in parallel in the plurality of upper and lower stages are alternately formed at positions where the drilling positions are staggered in the vertical direction. . The water discharge type head according to claim 1, wherein an outlet for ejecting water downward is provided at the center of the deflector.

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