JPH06125999A - Extinguishing sprinkler piping structure - Google Patents

Abstract

PURPOSE:To provide sprinkler pipings requiring only a small number of connection points in which pipings are facilitated, and in which a height under the roof can be small. CONSTITUTION:In an extinguishing sprinkler piping structure to be installed under the roof, a branch onnection 9 having plural thread-type output connection ports at an outer diameter part of a connection main body is connected to a supply water main branch pipe 1 directly, output pipe parts 11, 12 are threaded to the output connection ports, and the output pipe parts 11, 12 and a sprinkler head installation pipe part 8 fixed under the roof are connected to each other by flexible tubes 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping structure for fire extinguishing sprinkler piping for piping in the ceiling of a building.

[0002]

2. Description of the Related Art As a conventional sprinkler piping structure, for example, there is a sprinkler piping using a flexible hose having an outer surface of a flexible tube coated with a metal blade as shown in Japanese Utility Model Laid-Open No. 57-37188. See also Kai 63-
As shown in Japanese Patent No. 121889, there is a sprinkler pipe which is connected by using two S-shaped pipes and a size adjusting pipe joint. In each case, there was only one sprinkler head outlet connection port of the branch joint attached to the water distribution pipe, and from this outlet connection port to the sprinkler head attachment joint, flexible hoses and S-shaped pipes and dimension adjustment joints were used for piping.

[0003]

In the above-mentioned conventional sprinkler pipe, branch pipes must be provided in the water distribution pipe at fine intervals according to the number of sprinkler heads. Water distribution pipes must also be installed according to the arrangement of sprinkler heads. Therefore, in reality, as shown in FIG. 5, the distribution pipe has an upper water supply main branch pipe 1 and a lower branch water distribution pipe 1 in which the branch water distribution pipe 2 is arranged in a different direction.
The branch water distribution pipes 2 are provided with branch joints 3 according to the number of sprinkler heads 7, and the flexible joint hose 5 or the S-shaped pipe 6 is used to connect the sprinkler head attachment joints 8 fixed to the ceiling from the outlet connection ports of the branch joints. I was piping.

Also in this case, the number of branch joints 3 provided in the branch water distribution pipe 2 is equal to the number of sprinkler heads, so that the number of connection points is increased, the material cost and the man-hour required for connection are increased, and the number of connection points is large. There were also many risks. Further, since the branch water distribution pipe 2 is piped from the main water supply branch pipe 1 to the lower stage thereof in a different direction, a large space above the ceiling is required and there is a problem of limiting the indoor height. The present invention solves the above-mentioned problems, and provides a sprinkler piping structure which has a small number of connection points, facilitates piping, and requires a small space above the ceiling.

[0005]

SUMMARY OF THE INVENTION The gist of the present invention is a fire extinguishing sprinkler piping structure for piping under the ceiling, in which a plurality of screw-in type take-out connection ports are provided at the outer diameter portion of a joint body having main connection ports on both sides. The branch joint having the above is directly connected to the main water supply branch pipe, the take-out pipe portion is screwed into the take-out connection port, and a flexible pipe is provided between the take-out pipe portion and the sprinkler head mounting pipe portion fixed to the ceiling ceiling. It is a fire extinguishing sprinkler piping structure characterized by being connected by.

[0006]

Since the present invention has the above-mentioned structure, the take-out pipe portion is screwed into the take-out connection port of the branch joint directly attached to the main water supply branch pipe, and the take-out pipe portion is fixed to the ceiling above the space. It is possible to directly pipe a flexible pipe up to a plurality of fixedly arranged sprinkler head mounting pipe portions. That is, it is possible to pipe up to a plurality of sprinkler heads with one branch joint. For this reason, the number of pipes of the main water supply branch pipe can be reduced, and the number of locations of branch joints provided in the main water supply branch pipe can be reduced.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 is a main water supply branch pipe, and main connection ports 91 and 92 of a branch joint 9 are screwed into the main water supply branch pipe 1. There are multiple outer diameters of the body of the branch joint 9, four at 90 ° intervals here.
Screw-in type take-off connection ports 93a, 93b, 93c,
93d is provided, and the take-out connection port has a take-out pipe section 1
Male threads 1 and 12 are screwed in. On the other hand, the sprinkler head 7 is connected to the sprinkler head attachment pipe portion 8 and the head attachment pipe portion 8 is attached to the ceiling frame 15 with fixing fittings 14 at a predetermined space behind the ceiling. The flexible tube 10 that connects the take-out tube portions 11 and 12 and the head mounting tube portion 8 is a stainless steel bellows tube or a soft thin copper tube or a thin metal tube sandwiched between the inner and outer surfaces with a resin layer. A structured composite tube is used. These tubes can be bent relatively easily and have good corrosion resistance so that they will not corrode and leak water. Extraction connection ports 93a, 93b, 93c, 93
The angle position of d is an oblique direction forming about 45 ° with respect to the vertical direction, and the take-out pipe portion 11 screwed into the take-out connection ports 93a and 93b in the upper part is an elbow shape so that the flexible pipe can be taken out obliquely downward without any difficulty. There is. Bottom outlet connection 93
The take-out tube portion 12 screwed into the c and 93d has a linear shape.

2 and 3 show examples of the structures of the take-out pipe portions 11 and 12 screwed into the take-out connecting ports of the flexible pipe 10 and the branch joint 9 and the connecting portion between the flexible pipe 10 and the head mounting pipe portion 8. It is shown. In the embodiment shown in FIG. 2, a male screw for screwing a cap nut 17 is provided at a connection port 16 of the take-out pipe portions 11 and 12 or the flexible pipe of the head mounting pipe portion 8, and a taper sheet surface is provided at a tip portion thereof.
18 is provided. After the cap nut 17 is attached to the end of the flexible tube 10, the end 19 is enlarged to form the expanded taper surface 20. A tapered inner surface 21 is also formed on the inner surface of the rear side of the cap nut 17, and when the nut 17 is tightened by sandwiching the expanded taper surface 20 of the pipe, the expanded taper surface 20 makes an annular contact with the tapered seat surface 18. However, stable sealing performance can be achieved even with a slight nut tightening torque. Further, making the portion of the tapered sheet surface 18 in contact with the expanded tapered surface 20 of the flexible tube a spherical surface is also an effective method for ensuring the sealing property.

In the embodiment shown in FIG. 3, a packing chamber 22 is provided on the inner surface of the connection port 16 and a tapered inner surface 23 is provided at the inlet, and a packing 24 is attached to the packing chamber 22. The cap nut 25 is screwed into the connection port 16 and has a tapered inner surface 26 on the inner surface. Install the lock ring 27 between the connection port 16 and the cap nut 25,
Both sides of 27 are tapered outer surfaces that abut the tapered inner surfaces 23, 26.
28 and 29 are provided, and bite teeth 30 are provided on the inner surface. When the flexible tube 10 is inserted into the connection port 16 by a predetermined amount, the packing 24 is compressed and the outer surface of the tube 10 is sealed. Then, when the cap nut 25 is tightened, the lock ring 27 is compressed by the taper inner surface 23 of the connection port 16 and the taper inner surface 26 of the nut 25, and the biting teeth 30
Is cut into the outer peripheral surface of the tube 10 and is firmly fixed. Further, if one cut is provided on the circumference of the lock ring, the biting teeth 30 are more reliably bited into the outer peripheral surface of the tube 10.

The unwinding pipe of the flexible pipe 10 from the take-out pipe parts 11 and 12 attached to the take-out connection port of the branch joint 9 to the connection part with the head mounting pipe part 8 connects either one of the connection parts. After that, the curved portion is appropriately formed so as to avoid an obstacle and is connected to the other connecting portion. FIG. 4 shows a piping structure of another embodiment. In this case, cheese is screwed into the main water supply branch pipe 1 with the branch port facing downward, and the branch joint 9 is connected in two stages to the branch port of the cheese via the short pipe 1a of the main water supply branch pipe. The plug is screwed into the lower main connection port of the lower branch joint. A take-out pipe portion 12 is screwed into four take-out connection ports of the branch joint 9, and a flexible pipe 10 is connected between the take-out pipe portion 12 and the sprinkler head attachment pipe portion 8 as in the case of FIG. In FIG. 4, water is distributed to the eight sprinkler heads from the upper and lower branch joints 9, but if only six water distributions are needed, the take-out pipe section 12
Replace the plug with a plug and put the lid on. Also flexible tube 10
It is also effective to shift the positions of the outlet connection ports of the upper and lower branch joints 9 by 45 ° or an appropriate angle so that they can be easily arranged. In this case, since there are a total of eight outlet connection ports, the number of cheese connection points to be connected to the water distribution main branch pipe 1 is smaller than that in the above embodiment. In addition, the number of the distribution main branch pipes 1 is also reduced.

FIG. 5 shows a piping structure of another embodiment in which cheese is attached to the main water supply branch pipe 1 with its branching port horizontal, and the water supply branching pipe 1b is screwed into the cheese branching port. An elbow-type branch joint 9a having four lead-out connection ports 93e, 93f, 93g and 93h is connected to the other end of 1b at 90 ° intervals on the outer diameter of the body. A relatively long straight tubular take-out tube portion 12a is screwed into the take-out connection ports 93e, 93f and the like. Further, the sprinkler head mounting pipe portion 8a also has a relatively long straight pipe portion which is drawn horizontally, and the end portion thereof is the take-out pipe portion
It is arranged near 2a and is connected to the end of the take-out tube portion 12a by a flexible tube 10a. In this case, flexible tube 10a
Can be relatively short and economical. The branch joint 9 is connected to the lower part of the elbow type branch joint 9a via the branch pipe 1C, the take-out pipe portion 12 is screwed to the lower part of the elbow type branch joint 9a via the bush 1d, and the flexible pipe 10 is further connected. It is connected to the sprinkler head mounting pipe portion at a position closer to the sprinkler head mounting pipe portion 8a. Therefore, in the embodiment of FIG. 5, water can be distributed to a total of 9 sprinkler heads,
Efficient in various aspects.

[0012]

As described above, according to the present invention, since the pipe from the main water supply branch pipe to the sprinkler head mounting pipe portion can be directly connected, the conventional branch water distribution pipe is not required and the main water supply branch pipe is connected. The number of connection points of the branch joint is also reduced. Therefore, sprinkler piping can be performed easily, the risk of water leakage is reduced, and the construction period of piping work can be significantly shortened.
Furthermore, since a flexible pipe can be connected to the branch joint that is directly connected to the main water supply branch pipe, it is possible to pipe up to the sprinkler head mounting pipe section,
Since the space above the ceiling is small and the height of the room can be increased accordingly, architectural design becomes easy.

Further, since the branch joint part is a combination of the branch joint and the take-out pipe part, the take-out can be taken out whether the mounting direction is horizontal or vertical, and the sprinkler head is close or relatively far. This can be easily handled by changing the shape of the pipe section, so there is a high degree of freedom in the mounting position of the branch joint. Further, since the branch joint is only female thread, it is easy to process, and by separating it from the branch joint, the take-out pipe parts can be machined together in the same shape, which is economical. Further, since the branch joints can be used in combination with each other, it is possible to easily cope with the case where the number of sprinkler heads and the arrangement situation are different.

[Brief description of drawings]

FIG. 1 is a perspective view of sprinkler piping showing an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing a structure of a connecting portion which is connected to the flexible tube 10.

FIG. 3 is a partial cross-sectional view showing a structure of a connecting portion which is connected to the flexible tube 10.

FIG. 4 is a perspective view showing another embodiment.

FIG. 5 is a perspective view showing another embodiment.

FIG. 6 is a perspective view showing a conventional sprinkler piping structure.

[Explanation of symbols]

 1 ... Main water supply branch pipe 7 ... Sprinkler head 8 ... Head mounting pipe portion 9 ... Branch joint 10 ... Flexible pipe 11, 12 ... Extraction pipe portion

Claims (1)

[Claims] 1. A water supply main branch pipe having a fire extinguishing sprinkler piping structure for piping in the ceiling, and having a plurality of screw-in type take-out connection ports on the outer diameter portion of a joint body having main connection ports on both sides. A fire extinguishing sprinkler, characterized in that it is directly connected, the take-out pipe portion is screwed into the take-out connection port, and a flexible pipe is connected between the take-out pipe portion and the sprinkler head mounting pipe portion fixed to the ceiling ceiling. Piping structure.