JPH114906A - Sprinkler fire extinguishing equipment - Google Patents

Abstract

(57) [Summary] A pipe can be piped in a narrow space in a vertical direction, and water can be distributed to a large number of sprinkler heads at a uniform pressure. A branch pipe 12 branched from a water supply pipe 11 includes:
A cylindrical first header 20 is mounted horizontally. The first header 20 has four branch pipe connection portions 2 on its peripheral surface.
2 are provided at equal intervals in the axial direction, and the opening area at the end opposite to the end connected to the branch pipe 12 is small. In the first header 20, a cylindrical second header 50 is provided concentrically by a connecting pipe 40, and three branch pipe connecting portions 2 are provided on the peripheral surface of the second header.
2 are provided at equal intervals in the axial direction. First
Branch pipes 31 each formed of a flexible pipe are connected to the branch pipe connecting portions 22 and 52 of the header 20 and the second header 50, and a sprinkler head 32 is provided at the tip of each branch pipe 31. I have.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sprinkler fire extinguishing system installed in a house or the like.

[0002]

2. Description of the Related Art In a house or the like, in a sprinkler fire extinguishing system provided for initial fire extinguishing, a plurality of sprinkler heads are arranged at appropriate intervals on a ceiling, and water from a water supply pipe is supplied to each sprinkler head. Each is supplied.

In such a sprinkler fire extinguishing system,
Usually, water supplied from a water supply pipe is distributed to a plurality of sprinkler heads by a header. For example, JP-A-8-24360 discloses that
A configuration is disclosed in which one cylindrical header is coaxially attached to a branch pipe horizontally branched from a water supply pipe, and the header distributes water to a plurality of sprinkler heads. The header has multiple branch connections,
The branch pipes are provided along the axial direction, and branch pipes each having a sprinkler head attached to the tip thereof are connected to each branch pipe connection part.

[0004]

As described above, in the configuration in which one header is attached to the branch pipe of the water supply pipe and water is distributed to each sprinkler head by this header, the sprinkler head to which the water is distributed is provided. The problem is that the number is limited and the water cannot be distributed to a large number of sprinkler heads.

In order to solve such a problem, for example, a plurality of headers having the same configuration are attached in parallel to a branch pipe branched horizontally from a water supply main pipe, and water is distributed from each header to a sprinkler head. A method of doing so has also been proposed. However, in this case, in order to attach a plurality of headers to the branch pipe, an odd-shaped joint such as an elbow or a cheese is required, and the economic efficiency may be impaired.

Further, a method has been proposed in which a plurality of cylindrical headers are connected in series in the vertical direction, and water is distributed to sprinkler heads from branch pipes connected to the peripheral surface of each header. . However, recently, in order to reduce building costs, floor slabs are becoming thinner, and the space with the ceiling is becoming narrower. Thus, it is becoming difficult to arrange a plurality of headers vertically. is there.

The present invention has been made to solve such a problem, and an object of the present invention is to distribute water to a large number of sprinkler heads at a uniform pressure.
It is an object of the present invention to provide an economical sprinkler fire extinguishing system that can be securely arranged even in a narrow space between a floor slab and a ceiling.

[0008]

SUMMARY OF THE INVENTION A sprinkler fire extinguishing system according to the present invention has a branch pipe at one end such that water flows in from a branch pipe branched horizontally from a water supply pipe and flows out from the other end. , A plurality of branch pipe connecting portions are arranged along the axial direction, and a cylindrical first header, and one end portion is formed so that water flowing out of the first header flows in. A cylindrical second header which is attached to the first header at an appropriate interval and in which a plurality of branch pipe connection portions are provided in the axial direction; and a respective one of the first header and the second header. It is characterized by comprising a branch pipe connected to each of the branch pipe connection portions, and a sprinkler head provided at a tip end of each branch pipe.

The first header has an opening area at an end attached to the branch pipe larger than an opening area at the other end. Each of the branch pipes is a flexible pipe.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a partially cutaway side view showing an example of an embodiment of the sprinkler fire extinguishing equipment of the present invention. This sprinkler fire extinguishing system, for example,
It is provided in an apartment house having a plurality of floors, and is arranged between a ceiling panel on each floor and a floor slab constituting a floor surface of a floor above the floor, and each floor is inserted. Water supply pipe 1 vertically installed
The water supplied from 1 is supplied to each sprinkler fire extinguishing equipment. In the water supply pipe 11, water pumped from a pump room under the ground to a rooftop tank flows down. In the water supply pipe 11, each branch pipe 12 is branched in a horizontal state so as to extend below a floor slab constituting a floor surface of each floor. As each branch pipe 12, for example, a steel pipe whose inner peripheral surface is lined with vinyl chloride is used.

A first header 20 is attached to the branch pipe 12. The first header 20 has a cylindrical header body 21 that is arranged concentrically with the branch pipe 12 that is branched horizontally. The header body 21 has, at one end, a receiving port 21a provided with a thread groove on the inner peripheral surface. The distal end of the branch pipe 12 is inserted into this receiving port 21a, and the inner periphery of the receiving port 21a is formed. The thread groove provided on the surface is screwed to the thread groove provided on the outer peripheral surface of the distal end portion of the branch pipe 12. The water supplied from the branch pipe 12 passes through the receptacle 21a, and the header body 2
1.

The other end of the header body 21 is provided with a tapered portion 21b whose diameter is gradually reduced in a tapered shape. The cylindrical insertion opening 21c projects from the tapered portion 21b. Is provided. Insert 21c
Has a cylindrical shape concentric with the axis of the header body 21, and has a thread groove on its outer peripheral surface. Receiving port 21a provided at one end of header body 21
The water that has flowed in from the insertion port 21 provided at the other end
c. The opening area of the insertion port 21c on the water outflow side is the receiving port 21 on the water inflow side.
a is smaller than the opening area.

On the peripheral surface of the header body 21, four branch pipe connecting portions 22 are provided side by side in the axial direction. Each branch pipe connecting portion 22 has a cylindrical shape protruding from the peripheral surface of the header main body 21 in a direction orthogonal to the axial direction, and has the same inner diameter and outer diameter. Each branch pipe connection part 22 communicates with the inside of the header main body 21, and a thread groove is provided on the inner peripheral surface of each branch pipe connection part 22.

The first header 20 is made of a metal such as brass, steel, cast iron, or a synthetic resin such as vinyl chloride or polyethylene.
The diameter of a is 40 mm, the diameter of the insertion port 21c is 25 mm,
Each branch pipe connecting portion 22 has a diameter of 20 mm.

Each branch pipe connection portion 22 has a branch pipe 31 having a sprinkler head 32 attached to a tip end thereof.
Are connected by a joint 33. Each joint 33 is screw-coupled to a thread groove provided on the inner peripheral surface of each branch pipe connecting portion 25. As each branch pipe 31, a flexible polyolefin pipe such as a cross-linked polyethylene pipe having flexibility, a polyolefin pipe such as polybutene pipe, or a metal pipe such as stainless steel having flexibility is adopted.

A connection pipe 40 having a receiving port 41 at one end is connected to the insertion port 21c of the first header 20. On the inner peripheral surface of the receiving port 41 of the connecting pipe 40, a screw groove is provided which is screwed to a screw groove provided on the outer peripheral surface of the insertion port 21c. The other end of the connection pipe 40 is an insertion port 42 provided with a thread groove on the outer peripheral surface, and the second header 50 is connected to the insertion port 42.

The second header 50 is similar to the first header 2 except that the length of the header body 51 in the axial direction is short and three branch pipe connecting portions 52 are provided side by side along the axial direction.
0, the insertion hole 42 of the connecting pipe 40 is inserted into the socket 51a of the header main body 51 and screwed. An insertion port 51c provided via a tapered portion 51b in the header body 51 has a lid 61
Are screwed together, and the insertion port 51c is closed in a watertight state. The second header 50 is attached concentrically to the connecting pipe 40, and the branch pipe 31 provided with the sprinkler head 32 at the distal end by a joint 33 at each branch pipe connecting portion 52 of the second header 50. It is connected.

Each branch pipe 31 connected to each branch pipe connection part 22 of the first header 20 and each branch pipe 31 connected to each branch pipe connection part 52 of the second header 50 are connected to the floor slab of each floor. A sprinkler head 32 is installed along the ceiling panel provided below and provided at the tip of each branch pipe 31.
Are arranged at predetermined positions on the ceiling. Since each sprinkler head 32 normally discharges water at a radius of 2.7 mm when the diameter of the branch pipe 31 is 20 mm, the first header 20 and the second header 50 are usually
They are arranged at intervals of 3 m or more.

In such a sprinkler fire extinguishing system,
The water supplied from the water supply pipe 11 is supplied to the first header 20 through the branch pipe 12, and further the first header 2
0 to the second header 50 through the connecting pipe 40. In this case, the first header 20 has a large opening area at the receptacle 21a of the header main body 20 on the water inflow side, and has a small opening area at the insertion port 21c on the water outflow side. Because the header body 21
The water supplied therein flows into the four branch connections 22 at an equal pressure, and is supplied to the sprinkler heads 32 through the respective branches 31. Therefore, water is discharged from each sprinkler head 32 at the same discharge amount.

Further, since each branch pipe 31 is formed by a flexible pipe, it is possible to use a joint without using a joint.
Piping can be performed in a complicatedly bent state. In addition, since there is no need to use a joint, even if the pipe is bent in a complicated manner, the pressure loss of water flowing through the inside can be significantly reduced. , The amount of water discharged from the sprinkler head 32 at the tip end can be made uniform.

Since the second header 50 is arranged concentrically and horizontally with respect to the horizontally arranged first header 20, water passing through the inside of the header body 21 of the first header 20 is subjected to pressure. It will be supplied with little loss. And the second header 50 is also the first header 2
0, each branch pipe connection 52
Are supplied with equal pressure, and water is discharged from the sprinkler heads 32 attached to the ends of the respective branch pipes 31 at equal discharge amounts.

[0022]

As described above, in the sprinkler fire extinguishing system of the present invention, the first header and the second header are connected in series, and water is distributed from each header to a plurality of sprinkler heads. Therefore, even when the space between the floor slab and the ceiling is narrow, it is possible to reliably arrange the space. In addition, since the opening area of the first header at the outflow-side end of the water is smaller than the opening area of the inflow-side end, water can be distributed to each sprinkler head at a uniform pressure. . Furthermore, by using a flexible pipe as a branch pipe for supplying water from each header to each sprinkler head, pressure loss to each sprinkler head can be reduced.

[Brief description of the drawings]

FIG. 1 is a partially broken side view showing an example of an embodiment of a sprinkler fire extinguishing system of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Water supply pipe 12 Branch pipe 20 1st header 21 Header main body 22 Branch pipe connection part 31 Branch pipe 32 Sprinkler head 33 Joint 40 Connecting pipe 50 2nd header 51 Header main body 52 Branch pipe connection part 61 Lid

Claims (3)

[Claims] 1. One end is attached to a branch pipe so that water flows in from a branch pipe branched horizontally from a water supply pipe and flows out from the other end. Are arranged in a line along the axial direction, and one end is provided at an appropriate distance from the first header so that water flowing out of the first header flows into the first header. A tubular second header provided with a plurality of branch pipe connecting portions arranged in the axial direction, and branch pipes respectively connected to the branch pipe connecting portions of the first header and the second header. A sprinkler fire extinguishing facility, comprising: a sprinkler head provided at a distal end of each branch pipe. 2. The sprinkler fire extinguishing system according to claim 1, wherein the first header has an opening area at an end attached to the branch pipe larger than an opening area at the other end. 3. The sprinkler fire extinguishing system according to claim 1, wherein each of the branch pipes is a flexible pipe.