JPH06170008A - Piping structure for fire extinguishing sprinkler - Google Patents

Abstract

PURPOSE:To provide the sprinkler piping structure in which the number of connecting parts is small, the piping is facilitated, and also, a small height space on the ceiling is enough. CONSTITUTION:In the fire extinguishing sprinkler piping structure subjected to piping on the ceiling, a branch joint 9 having plural take-out connecting ports 11, 12 and 13 is connected directly to a water supply main branch tube 1, and the plural take-out connecting ports 11, 12 and 13, and a sprinkler head fitting joint 8 fixed onto the ceiling are connected with a flexible tube.

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 a metal blade on the outer surface of a flexible tube, as shown in Japanese Utility Model Laid-Open No. 57-37188. Further, as shown in Japanese Utility Model Laid-Open No. 63-121889, two S
There are sprinkler pipes that connect using character pipes and size adjustment pipe joints. In each case, there is only one sprinkler head extraction connection port of the branch joint that can be attached to the water distribution pipe.
A flexible hose, an S-shaped pipe, and a dimension adjusting joint are used to connect the take-out connection port to the sprinkler head mounting joint.

[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]

The gist of the present invention is a fire extinguishing sprinkler piping structure for piping in the ceiling, and a branch joint having a plurality of outlet connection ports is directly connected to the main water supply branch pipe, The fire extinguishing sprinkler piping structure is characterized in that a flexible pipe is connected between a take-out connection port and a sprinkler head mounting joint fixed to the ceiling.

[0006]

Since the present invention has the above-described structure, a plurality of branch joints having a plurality of outlet connection ports directly attached to the main water supply branch pipe are fixed to the ceiling and fixedly arranged at intervals. Even the sprinkler head mounting joint can be directly piped with a flexible pipe. 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. On the body of the branch joint 9, there are two sprinkler head outlet connection ports 11, 12 and 1 horizontally and two at the bottom.
3 is provided. On the other hand, the sprinkler head 7 is connected to the sprinkler head mounting joint 8, and the head mounting joint 8 is mounted on the ceiling frame 15 by fixing fittings 14 at a predetermined space behind the ceiling. The flexible pipe 10 connecting the take-out connection ports 11, 12, 13 of the branch joint 9 and the head mounting joint 8 has a stainless steel bellows pipe, a soft thin copper pipe or a thin metal pipe sandwiched between inner and outer surfaces. A composite tube having a sandwich structure of resin layers is used. These tubes can be bent relatively easily and have good corrosion resistance so that they do not corrode and block the holes in the sprinkler head.

2 and 3 show examples of the structures of the take-out connection port of the flexible tube 10 and the branch joint 9 and the connecting portion of the flexible tube 10 and the head mounting joint 8. In the embodiment of FIG. 2, the connection port 16 of the branch joint 9 or the head mounting joint 8 with the flexible tube is provided.
Is provided with an external thread to be screwed with the cap nut 17, and a taper sheet surface 18 is provided at the tip thereof. 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 the tapered inner surface 2
The angle of 1 is a little larger than the angle of the taper sheet surface 18, and when the nut 17 is tightened with the tube expansion taper surface 19 in between, the expansion taper surface 19 is an annular shape with the taper sheet surface 18. The stable sealing performance can be achieved even with a slight tightening torque of the nut.

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. Cap nut 25
Is screwed into the connection port 16 and has a tapered inner surface 26 on the inner surface. A lock ring 2 is provided between the connection port 16 and the cap nut 25.
7, the lock ring 27 is provided with tapered outer surfaces 28 and 29 on both sides of the lock ring 27 for abutting the tapered inner surfaces 23 and 26, and the inner surfaces have biting teeth 30. 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. And cap nut 2
When 5 is tightened, the taper inner surface 23 of the connection port 16 and the nut 25
The lock ring 27 is compressed by the taper inner surface 26, and the biting teeth 30 bite into the outer peripheral surface of the tube 10 to be firmly fixed. Further, if one cut is provided on the circumference of the lock ring, the biting teeth 30 are more surely bited into the outer peripheral surface of the tube 10.

Outlet connection ports 11, 12 of the branch joint 9,
The unwinding pipe of the flexible tube 10 from 13 to the connecting portion with the pipe of the head mounting joint 8 is formed by connecting one of the connecting portions and then appropriately forming a bent portion so as to avoid an obstacle while the other is connected. Connect with the connection part of. FIG. 4 shows a branch joint 31 of another embodiment. In this case, four outlet connection ports 32, 33, 34 are provided horizontally from the body of the branch joint 31, and two outlet connection ports 36, 37 are provided downward. In this case, since there are a total of 6 outlet connection ports, the number of connection points of the branch joint 31 connected to the main water distribution branch pipe 1 is smaller than that in the above-described embodiment. In addition, the number of distribution main branch pipes 31 is also reduced.

[0011]

As described above, according to the present invention, since the water supply main branch pipe can be directly connected to the head mounting joint,
The conventional branch water distribution pipe is not required, and the number of branch joints connected to the main water supply branch pipe is 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 directly connected to the main water supply branch pipe to connect to the head mounting joint, the height space above the ceiling can be reduced, and the indoor height can be increased accordingly, facilitating architectural design. Become.

[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 connected to the flexible tube 10.

FIG. 4 is a perspective view showing another embodiment of the branch joint.

FIG. 5 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 joint 9 Branch joint 10 Flexible pipe 11, 12, 13 Extraction connection port

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Shinji Aoki 2 Daifuku, Kuwana City, Mie Prefecture Hitachi Metals Co., Ltd. Kuwana Factory

Claims (1)

[Claims] 1. A fire extinguishing sprinkler piping structure for piping under the ceiling, wherein a branch joint having a plurality of outlet connection ports is directly connected to the main water supply branch pipe, and the sprinkler is fixed to the ceiling above the plurality of outlet connection ports. A fire extinguishing sprinkler piping structure characterized in that a flexible pipe is connected between the head mounting joints.