JPH07231950A - Sprinkler head - Google Patents

Abstract

PURPOSE:To improve workability and reliability with a shortening of working time by making a heat collection plate mounting part of a heat sensitive decomposition part as a tapered cylinder while a mounting part of the heat collection plate on the heat sensitive decomposition part as a cylinder and a tapered hole for fitting the head sensitive decomposition part into the cylinder is formed thereon. CONSTITUTION:A cylinder 14 having a tapered cylinder part 18 with a lower part thereof tapered downward is provided at a lower part of a heat sensitive decomposition part and a cover 17 and a heat collection plate 6 are mounted thereon. On the other hand, the heat collection plate 6 is formed in a disc and a cylinder part 19 is formed at the center thereof. A tapered hole 20 being expanded upward is formed inside the cylinder part 19. The tapered cylinder part 18 of the cylinder 14 and the tapered hole 20 of the cylinder part 19 of the heat collection plate 6 are formed in the same tapered shape so that the cylinder part 18 is fitted into the hole 20 to mount. Here, the undersurface of the cylinder 14 is made to flush the undersurface of the heat collection plate 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sprinkler head for extinguishing a fire, and more particularly to a sprinkler head for improving operability.

[0002]

2. Description of the Related Art A sprinkler head is a thermosensitive decomposition part that decomposes due to an abnormally high temperature of the fire when a fire occurs,
The valve element held in the heat-sensitive decomposition section opens the valve seat, and a large amount of water is sprayed from there to extinguish the fire.

By the way, it is desirable that the sprinkler head has an excellent operability in that, in the event of a fire, the heat-sensitive decomposition portion decomposes and sprays water as soon as possible. In other words, if an initial fire can be extinguished with a sprinkler head in the event of a fire, not only will the damage due to the spread of fire be reduced, but immediately after the fire is extinguished, water will flow out to the next room or downstairs and expensive office machines and furniture will be lost. It is also possible to prevent water damage such as wetting important documents.

Therefore, conventionally, a sprinkler head has been provided with means for improving its operability. The means was to attach the heat collecting plate to the vicinity of the low melting point alloy that is a part that receives heat in the heat sensitive decomposition portion, for example, in the case of a compression type heat sensitive decomposition portion, a cylinder filled with the low melting point alloy. . If a heat collecting plate is attached in the vicinity of the low melting point alloy in this way, the heat of the fire can be efficiently collected by the heat collecting plate when a fire occurs, and can be transmitted to the low melting point alloy to accelerate the melting of the low melting point alloy. it can.

By the way, the conventional sprinkler head is
As shown in FIG. 4, the heat collecting plate B has a simple plate shape, and the center hole is inserted into a cylindrical cylinder C, and the peripheral portion of the cylinder is caulked by a mechanical means. . In other words, the heat collecting plate is attached by caulking in a conventional manner, and it was only necessary to firmly attach the heat collecting plate.

[0006]

By the way, in the conventional sprinkler head in which a heat collecting plate is installed in the heat-sensitive decomposition portion,
When a fire occurs, it takes a long time for the sprinkler head to operate, and the time it takes for the sprinkler head to operate is extremely different. An object of the present invention is to provide a sprinkler head that is more excellent in terms of operability and reliability that the operation time is short and the operation is always performed within a fixed time.

[0007]

SUMMARY OF THE INVENTION It takes a long time for the present inventor to operate with a conventional sprinkler head,
In addition, as a result of intensive research on the cause of the variation in the operation time, it was found that the heat collecting plate was attached to the heat-sensitive decomposition portion by caulking.

That is, the caulking is to bend a part of metal with a press and to hold the pressure at the bent portion. Therefore, the pressed state varies during caulking due to slight errors in the material dimensions, stroke errors in the press, and the like. When the pressure is different, the contact state between the heat-sensitive decomposition part and the heat-collecting plate also becomes various, and the heat-transfer state from the heat-collecting plate to the heat-sensitive decomposition part is not uniform, and the operation time is delayed. Or, the operation time varies.

The present inventor has noticed that, when two objects are brought into contact with each other, when a tapered object is inserted into a hole having the same shape, the deeper the insertion, the closer they are in contact with each other. And completed the present invention.

According to the present invention, in the sprinkler head in which the heat collecting plate is installed in the heat decomposing portion, the portion of the heat decomposing portion to which the heat collecting plate is attached is a cylindrical portion having a tapered taper. Has a cylindrical part in the center, and the cylindrical part of the heat collecting plate has a tapered hole on the inner side of the cylindrical part of the heat-sensitive decomposition part,
The sprinkler head is characterized in that the cylindrical portion of the heat-sensitive decomposition portion and the cylindrical portion of the heat collecting plate are inserted in a close contact state.

According to the present invention, since the heat collecting plate may fall down only by inserting the cylindrical portion of the heat sensitive decomposition portion and the cylindrical portion of the heat collecting plate into a close contact state, the heat sensitive decomposition portion and the heat collecting plate may be separated from each other. Must use some means not to leave. For example, chamfer the lower part of the cylindrical part of the heat collecting plate by cutting a little, and when inserting the heat collecting plate into the columnar part of the thermosensitive decomposition part, make an annular groove between the cylindrical part and the columnar part. To do. If the groove is filled with an adhesive after the cylindrical portion of the heat collecting plate is inserted into the cylindrical portion of the cylinder, the heat collecting plate is completely fixed to the heat-sensitive decomposition portion and the heat collecting plate does not drop. Alternatively, in order to prevent the heat collecting plate from falling, a screw hole may be screwed in the heat-sensitive decomposition portion, a screw may be screwed into the screw hole, and the heat collecting plate may be locked by the screw head.

[0012]

[Operation] If the heat collecting plate is attached to the heat decomposing portion in a cylindrical shape and the heat collecting plate is attached to the heat decomposing portion in a cylindrical shape, the contact area between the heat collecting plate and the heat collecting plate becomes very large. The heat propagates quickly to the heat-sensitive decomposition portion, and the amount of heat propagation increases. Also, if the heat collecting plate mounting part of the heat decomposing part is tapered, and the heat decomposing part far part mounting part of the heat collecting plate is also taper approximately the same as the taper, the heat collecting plate is inserted into the heat decomposing part. If this happens, the entire contact area will always come into close contact.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a front sectional view of a flash type sprinkler head which is an embodiment of the present invention, FIG. 2 is an enlarged sectional view of an essential part for explaining attachment of a heat collecting plate, and FIG. 3 is an essential part after attaching the heat collecting plate. It is an expanded sectional view.

The flash type sprinkler head comprises a main body 1, a frame 2, a valve body 3, a deflector 4, a heat sensitive decomposition portion 5, a heat collecting plate 6 and the like.

The main body 1 has a water guiding hole 7 formed in the center thereof, a lower end thereof serves as a valve seat 8, an outer peripheral upper portion thereof is provided with a male screw 9, and a lower end thereof serves as a flange 10.

The frame 2 has a cylindrical shape, the lower end of which is an inner flange 11, and the upper end of which is screwed into the flange 10 of the main body 1.

A packing is attached to the upper portion of the valve body 3 and closes the valve seat 8 of the main body 1 in a normal state.

The deflector 4 is dish-shaped and has a large number of blades formed around the deflector 4, and is hung from a ring 12 during operation. The deflector 4 is installed below the valve body 3.

The heat-decomposable portion 5 is installed in the lower portion of the frame 2 and holds the valve body 3 via the guide post 13. In the embodiment of the present invention, a compression type is adopted as the heat-sensitive decomposition portion. The compression type heat-sensitive decomposition portion has a low melting point alloy 15 filled in a cylinder 14, and a plunger 16 is placed on the low melting point alloy. Well known about heat-sensitive decomposition (see: Japanese Patent Publication Sho 58-3698)
No. 5), detailed description thereof will be omitted here.

In the thermal decomposition part, it is an important requirement how quickly the heat of the fire is transmitted to the low melting point alloy to melt the low melting point alloy. In a sprinkler head equipped with a compression-type heat-sensitive decomposition part, when a fire occurs, the low melting point alloy melts due to the abnormally high temperature of the fire, causing the plunger to sink into the cylinder, destroying the balance of the heat-sensitive decomposition part and The disassembly part is designed to be disassembled.

A cover 17 and a heat collecting plate 6 are attached to the lower portion of the cylinder 14 installed at the lower end of the heat-sensitive decomposition portion 5. The cover 17 covers the heat-decomposable portion 5 which is aesthetically unfavorable, but also has a heat collecting effect. In the embodiment of the present invention, a heat collecting plate 6 is attached under the cover 17 in order to further improve the heat collecting effect. The heat collecting plate 6 collects an abnormally high temperature when a fire occurs and propagates it to the low melting point alloy 15 in the cylinder 14. In the sprinkler head, the propagation state of heat from the heat collecting plate greatly affects the operability and reliability.

Here, the attachment state of the heat-sensitive decomposition portion and the heat collecting plate in the sprinkler head of the present invention will be described.

The lower portion of the cylinder 14 is a tapered columnar portion 18 that tapers downward. Further, the heat collecting plate 6 is disk-shaped and has a cylindrical portion 19 formed in the center thereof, and a hole 20 inside the cylindrical portion is tapered such that the hole 20 widens toward the top. The cylindrical portion 18 of the cylinder 14 and the hole 20 of the cylindrical portion 19 of the heat collecting plate 6 are tapered in substantially the same shape. Then, the cylindrical portion 18 is connected to the cylindrical portion 1.
The lower surface of the cylinder 14 and the lower surface of the heat collecting plate 6 are flush with each other when 9 is fully inserted and stopped.

If the cylindrical portion 19 of the heat collecting plate 6 is firmly inserted into the cylindrical portion 18 of the cylinder 14, the heat collecting plate will drop due to thermal expansion / contraction due to ambient temperature changes or slight vibration. Due to fear, it is necessary to stop the heat collecting plate by other means. As a means for this, as shown in FIG. 2, a chamfer 21 is formed in the lower portion of the hole 20 of the cylindrical portion 19 of the heat collecting plate 6. Then, the cylindrical portion 19 of the heat collecting plate 6 is moved to the cylinder 14
When it is inserted in close contact with the cylindrical portion 18 of the above, an annular groove is formed between the cylinder and the heat collecting plate. If the adhesive 22 is filled and applied in this groove, the heat collecting plate will not drop from the cylinder.

Next, the operation of the sprinkler head of the present invention when a fire occurs will be described.

When a fire occurs and the high temperature airflow rises and reaches the sprinkler head mounted on the ceiling,
The high-temperature airflow first heats the heat collecting plate 6 attached to the bottom of the sprinkler head. Then, the heated heat collecting plate propagates heat to the cylinder. At this time, in the sprinkler head of the present invention, since the cylindrical portion 18 of the cylinder 14 and the hole 20 of the cylindrical portion 19 of the heat collecting plate 6 are in close contact with each other, it is as if the heat collecting plate and the cylinder are integrated. As described above, the heat is satisfactorily propagated from the heat collecting plate to the cylinder.

Then, this heat further propagates to the low melting point alloy 15 in the cylinder 14, and when the low melting point alloy is melted, the heat-sensitive decomposition portion loses its balance and decomposes. After the heat-sensitive decomposition portion is disassembled, the valve body 3 held in the heat-sensitive decomposition portion opens the valve seat 8 and water is jetted from the water guiding hole 7, hitting the deflector 4 which has stopped falling halfway and is sprayed in all directions to extinguish the fire. Done.

Although the flash type sprinkler head is shown as the sprinkler head in the embodiments of the present invention, the present invention can be applied to any structure of the sprinkler head as long as it has a structure in which a heat collecting plate is installed in the heat-sensitive decomposition portion. Needless to say, the thermally decomposable portion is not limited to the compression type and can be applied to the adhesion type in which the low melting point alloy is used for adhesion.

[0029]

As described above, in the sprinkler head of the present invention, the heat collecting plate and the cylinder are mounted in close contact with each other. Therefore, in the event of a fire, not only the heat is rapidly transferred from the heat collecting plate to the cylinder. , All sprinkler heads have excellent operability and reliability in that the time until the heat-decomposable part decomposes after the occurrence of fire is constant.

[Brief description of drawings]

FIG. 1 is a front sectional view of a flash type sprinkler head according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a main part for explaining attachment of a heat collecting plate in the sprinkler head of the present invention.

FIG. 3 is an enlarged cross-sectional view of a main part of the sprinkler head of the present invention after attaching a heat collecting plate.

FIG. 4 is an enlarged sectional view of a main part of a conventional sprinkler head.

[Explanation of symbols]

 1 Main body 2 Frame 3 Valve body 4 Deflector 5 Thermosensitive decomposition part 6 Heat collecting plate 14 Cylinder 15 Low melting point alloy 16 Plunger 17 Cover 18 Cylinder part of cylinder 19 Cylinder part of heat collecting plate 20 Cylinder hole 21 Chamfer 22 Adhesive

Claims (2)

[Claims] 1. In a sprinkler head in which a heat collecting plate is installed in the heat decomposing portion, a portion of the heat decomposing portion to which the heat collecting plate is attached is a tapered tapered column portion, and the heat collecting plate is at the center. Is a cylindrical part, and the inside of the cylindrical part of the heat collecting plate is a tapered hole with the same shape as the cylindrical part of the heat decomposing part, and the cylindrical part of the heat decomposing part and the heat collecting plate. The sprinkler head is characterized in that it is inserted in close contact with the cylindrical part of the sprinkler head. 2. A groove is formed between the lower end of the cylindrical portion of the heat-sensitive decomposition portion and the lower end of the cylindrical portion of the heat collecting plate, and the groove is filled with an adhesive. Sprinkler head as described.