JP2008212384A - Sprinkler head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sprinkler head uniformly and properly distributing sprinkling water. <P>SOLUTION: This sprinkler head SP includes a body 2 threadedly engaged with water plumbing, a frame 5 fixed to the body 2, a deflector 4 fixed at the end of the frame 5, and a thermosensitive valve opening means 6 energizing a valve element 3 to prevent the sprinkling in a stationary state and, for example, detecting heat in fire breaking, making the valve element 3 open and allowing the sprinkling. A part of a frame 5 where tail water is applied in the sprinkling is formed with a resin layer 13 to cover the outside face of the frame 5 composed of metal, so that the resin layer 13 is configured to correct the deformation and surface roughness liable to occur in manufacturing the frame by a sand mold. The water discharged in the sprinkling flows into the deflector 4 without being scattered unwatedly and uniformly and properly sprinkled by the deflector 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sprinkler head used for fire extinguishing equipment.

  A conventional sprinkler head includes a valve body connected to a water supply pipe for opening and closing a water outlet provided in the head body, a deflector fixed to the body through a plurality of frames, and the valve body and the deflector. And a heat-sensitive valve opening member disposed between the two.

In the sprinkler head, when the ambient temperature rises due to the occurrence of a fire, the heat-sensitive valve opening member senses and repels heat, and the valve body falls from the main body. As a result, the water outlet is in an open state, and water is discharged from the water outlet toward the deflector.
The discharged water for fire extinguishing collides with the deflector, and then scatters while the discharge direction is regulated by claws intermittently provided on the outer peripheral edge of the deflector. It is desirable that the amount of water scattered is uniform.

Japanese Utility Model Publication No. 56-48288 discloses an example of a sprinkler head configured to achieve uniform water discharge for fire extinguishing.
That is, the direction of the water spray distribution by the frame yoke is corrected, and a sub-deflector is installed adjacent to the main deflector to make the water spray even at high water pressure. According to this structure, the water jumped by the bent front-end | tip part provided in the sub deflector can be caught, and it can be sent to a main deflector. Therefore, even under high water pressure, uniform spraying can be performed as with normal pressure spraying.

Japanese Utility Model Publication No. 56-48288

However, according to the study of the present inventor, a new problem has been clarified regarding the homogenization of watering.
That is, it has been found that the water spray distribution does not depend only on the deflector but depends on the shape of the frame, the dimensional accuracy, and the surface finish.
When water is sprayed, the water discharged from the water outlet first hits the frame, is divided, and flows so as to hit the deflector. Accordingly, the portion of the frame that is sprayed with water (hereinafter referred to as the portion that contributes to the water spray distribution) must have a shape, surface finish, and the like that are designed.

The sprinkler head including the frame is a casting made of, for example, brass, bronze, brass or the like, and is generally manufactured using a sand mold. However, it is difficult to manage the sand mold and the flow of hot water, which has caused the component accuracy to not increase.
For example, in a frame manufacturing process using a sand mold, a defective product having an incomplete portion such as a tip portion of the frame not being pointed, deformation of the tip portion, or part of the tip portion being chipped may occur. .

In the frame manufacturing process, molten metal such as brass is poured into the sand mold, and the sand mold is broken and the frame is taken out when it is solidified. However, it may be taken out before it completely hardens in the process, and in this case, since the frame is not completely cooled, the frame may be deformed while being cooled after being taken out.
In addition, when the sand mold is not perfect, a part of the frame is cut off, or uneven portions are partially formed. Furthermore, if there is an air trap in the sand mold, this may also cause a part of the gap and a gap may be formed in the frame. In addition, the dimensional accuracy varies greatly depending on the manufacturing method.

  If the frame deformation or irregularities are formed in a portion that contributes to the water distribution of the frame, the discharged water does not flow accurately in the deflector direction, and an appropriate water distribution cannot be obtained.

  This invention is made | formed in view of the said situation, The objective is to provide the spring club head with favorable watering distribution.

  The present invention relates to a sprinkler head comprising a head body having a water outlet, a plurality of frames having one end fixed to the head body and the other end connected by a connecting portion, and a deflector fixed to the connecting portion. The resin layer is formed in a portion of the frame where water is discharged from the water outlet.

  In the present invention, the resin layer is formed so as to cover an outer side surface of a portion of the frame to which water is discharged from the water outlet.

  Furthermore, the present invention provides a valve body that closes the water outlet, and is disposed so as to be interposed between the valve body and the connecting portion, and supports the valve body so as to close the water outlet when there is no water discharge. A portion that is provided with a valve opening means and that is subjected to water discharge from the water discharge port is provided from the vicinity of the end of the heat-sensitive valve opening means on the connecting portion side toward the deflector side.

Since the present invention is configured as described above, the following various effects can be obtained.
That is, the resin layer was formed on the outer surface of the portion where the water discharged from the water outlet of the frame hits. As a result, even if irregularities are formed on the outer surface of the frame itself, or even if the pointed portion is deformed round by the sand mold, the resin layer can correct the shape as designed. Moreover, the dimensional accuracy of this resin layer is high. Accordingly, the discharged water will flow in the deflector direction after hitting a frame having a smooth surface finish and no deformation, and an appropriate watering distribution can be performed.

  As a result of repeated research and experiments in order to solve the above problems, the present inventor has found that the following may be performed. A frame is manufactured by a sand mold, and a resin layer is formed using a mold on an outer surface of a portion of the frame that contributes to water spray distribution. The mold has good dimensional accuracy and low resin viscosity. Therefore, even if there are irregularities or deformation on the outer surface of the frame, the resin flows evenly on the surface of the part that contributes to the sprinkling distribution, so it becomes smooth and the deformation is corrected. It can flow evenly.

Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS.
The sprinkler head SP includes a cylindrical head main body 2 having a water outlet 1, a valve body 3 that closes the water outlet 1, a deflector 4 fixed at a position facing the water outlet 1, the deflector 4 and the head A frame 5 that connects the main body 2 and a heat-sensitive valve opening member 6 that presses the valve body 3 in the valve closing direction are provided.

A screw portion 11 is formed on the outer surface of the head main body 2 as shown in FIG. 1, and is screwed into a water supply pipe (not shown). As shown in FIG. 4, the water outlet 1 penetrates the central portion of the head body 2 in the longitudinal direction, but the water supply side shown on the lower end side of FIG. 4 is formed with a large diameter and the water discharge side is formed with a small diameter.
The valve body 3 includes a valve body (not shown) inserted on the small-diameter side of the water outlet 1 and a large-diameter portion 3a exposed on the upper portion of the water outlet 1 as shown in FIG.

  In this embodiment, two frames (also called arms) are also provided at intervals of 180 °, but may be three at intervals of 120 ° or more. The frame 5 is provided with a reinforcing portion 5a at the base fixed to the head body 2, and from the vicinity of the upper end of the heat-sensitive valve-opening member 6 in a direction facing each other as shown in FIGS. 1 and 4, in other words, in the center direction. It is formed to be curved. This curved portion, that is, the hatched portion in FIG. 1, corresponds to a portion where water is discharged from the water outlet of the present invention, or a portion that contributes to the water spray distribution. In this way, the upper side of the frame 5 is curved toward the center direction, and the ends thereof are connected at the center to form a connecting portion.

  A screw hole 5 b is formed at the center of the upper portion of the frame 5. The deflector 4 is fixed to the upper end (connecting portion) of the frame 5 by caulking (caulking) or the like. The deflector 4 is formed in a disc shape, and claws 4a having different heights are intermittently formed on the outer periphery.

A set screw 12 is screwed into the screw hole 5b of the connecting portion so as to be partially exposed in FIG. A heat-sensitive valve opening member 6 is disposed between the lower end of the set screw 12 and the large diameter portion 3 a provided in the valve body 3. The heat-sensitive valve opening member 6 is a glass valve, and in the steady state (no water discharge), the upper end of the heat-sensitive valve opening member 6 is pressed by a set screw 12 to support the valve body 3 so as to close the water discharge port 1.
However, if high heat generated by a fire or the like is detected, it is crushed and the urging force of the valve body 3 is released. As a result, the valve body 3 bounces off and water is sprayed. The heat-sensitive valve opening member 6 may be constituted by a link mechanism using solder.

By the way, the portion where the water discharge shown by oblique lines in FIG. 1 is applied has a configuration in which the outer surface of the frame 5 is covered with the resin layer 13 as shown in the cross-sectional structures in FIGS. The portion where the resin layer is provided and which receives water from the water outlet of the frame faces the deflector side in the vicinity of the end of the heat-sensitive valve opening member 6 on the connecting portion side. The frame 5 is manufactured using a sand mold as described above. On the other hand, the resin layer 13 is formed by positioning the frame 5 in the mold and injecting resin around it.
Here, with reference to FIG. 2, the cross-sectional structure taken along the line AA shown in FIG. 1 will be described. The tip portion of the frame 5 is rounded by a sand mold. However, the front end portion 13a of the resin layer 13 is formed in a pointed shape or an acute angle so that the diversion can be performed satisfactorily. Further, the surfaces of both side surfaces 13b become smooth and the flow of water is improved, so that the scattering of water in an undesired direction can be reduced.

On the other hand, with reference to FIG. 3, the cross-sectional structure along BB shown in FIG. 1 will be described. Even if the recessed portion 5 c is formed on the surface of the frame 5 by the sand mold, the resin layer 13 is filled. A dent does not appear on the surface of the resin layer 13, and the resin layer 13 is smoothly formed by a mold. Furthermore, even if the thickness of the frame 5 is uneven, the resin layer 13 corrects it to a uniform thickness.
Therefore, the water flow at the time of watering becomes stable, and the flow and scattering of water in an undesired direction can be reduced.

Below, the watering operation | movement of a present Example is demonstrated.
In the steady state, as shown in FIG. 1, the heat-sensitive valve opening member 6 is interposed between the large diameter portion 3 a of the valve body 3 and the set screw 12. Since the main body 2 is connected to a water supply pipe (not shown), the valve body 3 is urged upward in FIG. 1 by water pressure. However, since the heat-sensitive valve opening member 6 acts so as to press the valve body 3 with the set screw 12 as a fulcrum, the water outlet 1 is closed by the valve body 3 and water discharge and water leakage are prevented. Although the sprinkler head may be mounted upward as shown in the figure, it is more often installed with the deflector facing downward.

  In the event of a fire, when the ambient temperature rises and reaches a predetermined temperature, the liquid in the heat-sensitive valve opening member 6 expands, the internal pressure rises, and the heat-sensitive valve opening member 6 is destroyed. As a result, the urging of the valve body 3 is released, and the valve body 3 is blown off by water pressure.

As a result, as shown in FIG. 4, high-pressure fire extinguishing water W is discharged from the water discharge port 1 toward the deflector 4, and is diverted so as to hit the deflector 4 by the portion of the frame 5 where the water is discharged.
Here, for convenience of explanation, if the discharged water is assumed to be Wa, as shown in FIG. 2, the discharged water is not retained by the acute tip portion 13a and the flow direction is not changed undesirably as shown in FIG. After flowing and splitting, it flows toward the deflector 4 along the smooth side surfaces 13b.

  The water discharge Wa that hits the deflector 4 is further diverted by the claws 4a formed on the deflector 4, and is uniformly sprinkled over a wide range. Therefore, the amount of sprinkling is not biased, and appropriate fire extinguishing activities by watering can be performed efficiently.

  In the said Example, it is the structure which formed the resin layer 13 in the outer surface of the part to which water discharge hits among the flame | frames 5 with the alloy with brass or bronze, and both advantages of the intensity | strength of a metal and the favorable property of resin processing Can be used. The frame 5 can be thinned to a desired strength, i.e., so as not to break even when exposed to high-pressure water spray. About the material of the resin layer 13, the thing excellent in heat resistance is good, for example, a polycarbonate etc. are preferable.

  The embodiment of the present invention is not limited to the above. For example, a portion of the arm where water is discharged is formed to be smaller than the design shape, and the arm is covered with resin so that the shape of the arm is the design shape. Anyway. Further, the present invention may be applied to an open-type sprinkler head that does not have a heat-sensitive valve opening member and a valve body. In this case, a resin layer may be provided on a cone formed above the connecting portion and provided at a position facing the water outlet.

It is a side view of the sprinkler head which shows one Example of this invention. It is an expanded sectional view which follows the AA line of FIG. It is sectional drawing which follows the BB line of FIG. It is sectional drawing of a sprinkler head.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water outlet 2 Main body 3 Valve body 3a Large diameter part 4 Deflector 4a Claw 5 Frame 5b Sprinkling port 6 Heat-sensitive valve opening member 11 Screw part 12 Valve receptacle 13 Resin layer SP Sprinkler head W Water discharge

Claims (3)

In a sprinkler head comprising a head body having a water outlet, a plurality of frames having one end fixed to the head body and the other end connected by a connecting portion, and a deflector fixed to the connecting portion,
A sprinkler head, wherein a resin layer is formed on a portion of the frame where water is discharged from the water outlet.   2. The sprinkler head according to claim 1, wherein the resin layer is formed so as to cover an outer surface of a portion of the frame where water is discharged from the water outlet.   A valve body that closes the water discharge port, and a heat-sensitive valve opening member that is disposed so as to be interposed between the valve body and the connecting portion and supports the valve body so as to close the water discharge port when there is no water discharge. 3. The sprinkler head according to claim 2, wherein a portion that receives water discharge from the water discharge port is provided from the vicinity of the end portion on the connection portion side of the heat-sensitive valve opening member toward the deflector side. .

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