JP2009112586A - Sprinkler head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sprinkler head by which deviation does not occur in water discharged from the nozzle when the sprinkler head is installed to be close to an elbow in the sprinkler head having a structure keeping a deflector normally housed inside, and the deflector hung by a pin and projected on the lower surface of a ceiling at the time of operation. <P>SOLUTION: In the nozzle 14 of this sprinkler head, a rectifying means 25 being a cylindrical member is installed which has a petal-like cross sectional shape. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a fire extinguishing sprinkler head, and more particularly to rectification of water discharged from a nozzle of a sprinkler head.

The fire-extinguishing sprinkler head is connected to a pipe laid in the building, and is fired by disassembling and spraying water in the pipe in the event of a fire.

A sprinkler head is embedded and installed in the ceiling, and there is a sprinkler head having a structure in which a deflector inside the sprinkler head protrudes from the lower surface of the ceiling during operation (see, for example, Patent Document 1).

FIG. 8 shows the operating state of the sprinkler head having the above structure. The main body 1 of the sprinkler head is connected to the pipe 2. A ring 5 is engaged with the lower end step portion 4 of the cylindrical frame 3 that is screwed with the female screw of the main body collar, and a plurality of pins 6 are suspended downward from the ring 5.

A plate-like deflector 7 having a plurality of wings is locked to the lower end step portion of the pin 6, and water discharged from the nozzle 8 slides on a plane on the deflector 7 and is scattered from the periphery of the deflector 7. The water is spread over a wide area.

JP-A-7-284545

In the above sprinkler head, when the sprinkler head is installed at a position where the connection with the pipe is close to the elbow, the elbow releases water from the nozzle of the sprinkler head while the water flow in the pipe is biased, and is evenly distributed to the deflector. There may be a phenomenon that the water flow does not hit. If the deflector collides with a deflected water flow, the shape of the water sprayed in the room will also be biased, and there is a possibility that water cannot be sprayed in the regular watering range.

In addition, when a large impact is applied to the deflector by a water hammer or the like when water collides unevenly with the deflector, an excessive load is applied to the pin supporting the deflector, and the pin may be bent and deformed.

Therefore, in view of the above problems, an object of the present invention is to provide a sprinkler head in which the water discharged from the nozzle is not biased when the sprinkler head is installed close to the elbow.

In order to achieve the above object, the present inventors have released the water flow as a turbulent flow when the sprinkler head is installed close to the elbow, and the non-uniform force acts on the deflector to cause the pin to move. Focusing on the fact that deformation is caused, the present invention has been completed on the assumption that the deformation of the pin can be prevented by rectifying the water discharged from the nozzle.

The invention according to claim 1 is a sprinkler head having a structure in which a main body having a nozzle is connected to a pipe, the deflector is normally housed inside, and the deflector is suspended by a pin during operation and protrudes from the lower surface of the ceiling. The sprinkler head is provided with rectifying means which is a cylindrical member having a petal-like cross-sectional shape in the nozzle.

According to a second aspect of the present invention, in the sprinkler head, a diameter of a circle inscribed in a cross-sectional shape of the rectifying means is in a range of 50% to 80% with respect to a nozzle diameter of the sprinkler head. It is.

A third aspect of the present invention is the sprinkler head according to the first aspect, wherein in the sprinkler head, the straightening means has no portion overlapping in the axial direction.

A fourth aspect of the present invention is the sprinkler head according to the first aspect, wherein in the sprinkler head, the rectifying means is reduced in cross-sectional shape from the inlet to the outlet of the nozzle.

A fifth aspect of the present invention is the sprinkler head according to the first aspect, wherein a notch is formed on the nozzle outlet side of the rectifying means in the sprinkler head.

A sixth aspect of the present invention is the sprinkler head according to the first aspect, wherein a plurality of rectifying means are stacked in the nozzle in the sprinkler head.

A seventh aspect of the present invention is the sprinkler head according to the first aspect, wherein a longitudinal groove is formed in a nozzle provided with a rectifying means.

The invention according to claim 8 is the sprinkler head according to claim 1, wherein the rectifying means is fixedly installed in the nozzle in the sprinkler head.

ADVANTAGE OF THE INVENTION According to this invention, the cross-sectional shape of a rectification member can be made into a petal shape, the surface area of the side surface of a rectification member can be increased, and the effect that a turbulent flow is rectified can be acquired because a water flow flows along the side surface of a rectification member. . As a result, when a large amount of water is discharged from the nozzle of the sprinkler head, it is possible to prevent the pin hanging the deflector from being deformed and to stably spray the water in the regular watering range. It has the effect of spraying water on the fire source without fail.

In the sprinkler head of the present invention, a tubular rectifying member having a petal-like cross-sectional shape is provided in a nozzle, and preferably 3 to 8 petals are provided. If the number of petals increases more than this, running water resistance may increase.

Further, the diameter of the circle inscribed in the cross-sectional shape of the rectifying means is preferably in the range of 50% to 80% with respect to the diameter of the sprinkler head, and is most preferably about 60 to 70%. If the diameter of the circle inscribed in the cross-sectional shape of the rectifying means is smaller than 50%, there is a concern that the dust inside the pipe may be clogged or the flowing water resistance will increase. On the other hand, if it is larger than 80%, the rectifying effect is reduced.

The rectifying means is preferably formed by plastically deforming a cylindrical member or by cutting out a material by a wire cutting method or the like. There is also a means to bend the plate material in the shape of a bellows, but when it is formed from a plate material, the ends of the plate material overlap each other and a joint can be made, but the joint part is weak and the rectifying member is deformed by the force of the water flow Therefore, it is preferable to form by a construction method that does not cause a seam.

It is also possible to form the cross-sectional shape of the rectifying means so as to be reduced from the inlet to the outlet of the nozzle, or to provide a notch on the nozzle outlet side. Further, a plurality of rectifying means may be stacked and installed in the nozzle. Furthermore, a rectifying effect can be obtained by forming vertical grooves in the nozzles of the sprinkler head.

Further, it is preferable that the rectifying means is fixedly installed in the nozzle so that the rectifying means does not rotate in the nozzle by the water flow. As a means for fixing, an adhesive, welding, brazing, a tight fit, or a rectifying means may be inserted into the nozzle and then the ring may be fitted into the nozzle.

It is also possible to implement a combination of a plurality of the above embodiments.

Embodiments of the present invention will be described below with reference to FIGS. 1 is a cross-sectional view of the sprinkler head of the present invention, FIG. 2 is a perspective view of the sprinkler head of FIG. 1 (partial nozzle cross-section), FIG. 3 is an exploded perspective view of the sprinkler head and rectifying means (partial cross-section of nozzle), FIG. 4 is a perspective view of the rectifying means having a notch, FIG. 5 is an exploded perspective view of the sprinkler head and the rectifying means (a plurality of installations) (partial cross section of the nozzle), FIG. 6 is another embodiment of the rectifying means, and FIG. It is sectional drawing at the time of watering of 1 sprinkler head.

The sprinkler head shown in FIGS. 1 and 2 has the same configuration as the sprinkler head described in Patent Document 1 described above. Since the configuration of the sprinkler head is not the gist of the present invention, detailed description thereof is omitted.

The sprinkler head 10 of FIG. 1 has a male screw 13 of a main body 12 connected to the end of a filled pipe 11 and has a nozzle 14 that is hollow inside. The nozzle 14 is a large-diameter hollow portion 14A that is a straight hole from the end on the pipe 11 side that is the inlet side to the intermediate stage 15, and the flow path is narrowed from the stage 15 toward the outlet side.

In the vicinity of the outlet end of the nozzle 14, it becomes a straight hole again, and a small-diameter hollow portion 14B is provided. Here, the inner diameter of the small-diameter hollow portion 14B corresponds to the nozzle diameter of the sprinkler head, and is a portion in which the diameter is strictly controlled so that the flow rate of the sprinkler head becomes a predetermined specification.

The outlet end 16 of the nozzle 14 is formed in an acute angle shape, and has a shape that can easily bite into the metal packing 17 that is a water stop member. The metal packing 17 is attached to a valve 18, and the valve 18 is installed in a disk-shaped deflector 19 in a state where it cannot be removed.

The deflector 19 is cut off at the periphery to form a plurality of wings. A plurality of pins 20 are provided through the periphery of the deflector 19, and a step portion 21 is formed at the lower end of the pin 20 so that the deflector 19 can be locked.

The upper end of the pin 20 is fixedly installed on an annular ring 22. The deflector 19 is slidable along the pin 20, and normally, a valve 18 attached to the deflector 19 is located at the outlet end 16 of the nozzle 14 via the metal packing 17, and is in the frame 21 of the sprinkler head 10. It is stored in.

A thermal decomposition unit 24 is installed under the deflector 19 via a saddle 23. The thermal decomposition unit 24 is decomposed by the heat of the fire, and since details are described in Patent Document 1, description thereof is omitted.

The rectifying means 25 of the present invention is cylindrical and has a petal shape in cross section. The diameter of the circle in contact with the convex portions 26, 26... Of the rectifying means 25 is preferably the same as or slightly smaller than the inner diameter of the large-diameter hollow portion 14A of the nozzle 14.

The diameter of the circle 28 inscribed in the concave portion 27 of the rectifying means 25 is preferably 50 to 80%, and most preferably about 60 to 70%, with respect to the inner diameter of the small hollow portion 14B. .

The straightening means 25 of the present invention is inserted into the large-diameter hollow portion 14 </ b> A of the nozzle 14 and is locked to the step portion 15. In this embodiment, it is installed by fitting, but other than that, it is fixed by adhesive or welding, or the convex portion 26 of the rectifying means is fitted in the vertical groove 29 provided in the nozzle 14 so that rotation is prevented. A fixed installation is also possible.

Further, when it is desired to obtain a rectifying effect by the vertical groove 29, the rectifying means 25 can be installed in the large-diameter hollow portion 14A so that the positions of the concave portion 27 of the rectifying means and the vertical groove 29 overlap (FIG. 3). Furthermore, the rectification effect can be obtained by forming the notch 30 on the outlet side of the rectification means 25.

The height of the rectifying means 25 is preferably set so as to fit within the large-diameter hollow portion 14A. It is also possible to install a plurality of rectifying means 25 in the large-diameter hollow portion 14A.

Furthermore, as a shape of the rectifying means, a cross-shaped cross section in which the tip of the convex portion 26 is rounded as shown in FIG. 6A, or a tip end side of the convex portion 26 is narrow as shown in FIG. In FIG. 3C, there is a case where the tip of the convex portion 26 is swollen. Further, the number of the convex portions 26 is not limited to 4 as shown in (a) to (b), and may be 6 or 8 as shown in FIGS.

Then, the state at the time of watering of the sprinkler head of this invention is demonstrated.

As shown in FIG. 1, the sprinkler head is installed in a state where the lower portion protrudes below the ceiling surface. When a fire occurs and the thermal decomposition unit 24 supporting the valve 18 is activated by the heat of the fire, the valve 18 drops downward due to the pressure of water in the nozzle 4 and the nozzle 14 is opened.

As the nozzle 14 is opened, water in the pipe 11 is discharged from the nozzle 14. At that time, the water in the pipe 11 passes through the rectifying means 25 and is rectified, and a rod-like water flow is discharged from the nozzle 14, and the metal packing 17 is mostly attached to the valve 18 on the deflector 19. collide. The water that collides with the metal packing 17 flows along the surfaces of the metal packing 17 and the deflector 19 and is scattered from the periphery of the deflector 19.

At this time, the deflector 19 is installed substantially horizontally, and the water that flows along the surface of the deflector 19 is scattered with a strong force in the horizontal direction.

When the water discharged from the nozzle 14 is turbulent, most of the water collides directly with the surface of the deflector 19, and the distance flowing along the surface of the deflector 19 in the peripheral direction collides with the metal packing 17. Compared to less. As a result, the flight distance in the horizontal direction tends not to increase.

The rectifying means is installed inside the nozzle of the sprinkler head, but can be installed inside the end of the pipe. In the above embodiment, the sprinkler head has a structure in which the deflector protrudes from the bottom surface of the ceiling during operation. However, the sprinkler head can be installed in a nozzle of a frame yoke type or multi-type sprinkler head, and further sprayed with water. It is also possible to install in a nozzle or a nozzle of a foam head.

Sectional view of the sprinkler head of the present invention 1 is a perspective view of the sprinkler head of FIG. Exploded perspective view of sprinkler head and rectifier (partial cross section of nozzle) Perspective view of rectifying means having a notch Exploded perspective view of sprinkler head and rectifier (multiple installations) (nozzle partial cross section) Other embodiments of rectifying means 1 is a cross-sectional view of the sprinkler head of FIG. Cross-sectional view of a conventional sprinkler head during watering

Explanation of symbols

10 Sprinkler head
11 Piping
12 Body
14 nozzles
17 Metal packing
18 valves
19 Deflector
20 pins
21 frames
22 rings
24 Thermal decomposition part
25 Rectification means

Claims (8)

A sprinkler head with a structure in which a main body with a nozzle is connected to a pipe, the deflector is normally housed inside, and the deflector is suspended by a pin and protrudes from the bottom of the ceiling during operation. A sprinkler head comprising a straightening means that is a cylindrical member having a shape.
2. The sprinkler head according to claim 1, wherein a diameter of a circle inscribed in a cross-sectional shape of the flow straightening unit is in a range of 50% to 80% with respect to a nozzle diameter of the sprinkler head.
2. The sprinkler head according to claim 1, wherein in the sprinkler head, the straightening means has no portion overlapping in the axial direction.
2. The sprinkler head according to claim 1, wherein in the sprinkler head, the cross-sectional shape of the rectifying means is reduced from the inlet to the outlet of the nozzle.
2. The sprinkler head according to claim 1, wherein a notch is formed on the nozzle outlet side of the rectifying means in the sprinkler head.
The sprinkler head according to claim 1, wherein a plurality of rectifying means are installed in the nozzle in the sprinkler head.
2. The sprinkler head according to claim 1, wherein in the sprinkler head, a longitudinal groove is formed in a nozzle provided with a rectifying means.
2. The sprinkler head according to claim 1, wherein the rectifying means is fixedly installed in the nozzle in the sprinkler head.

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