JPH0324227B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a piping method for a sprinkler fire extinguishing system that extinguishes a fire by sprinkling fire extinguishing water from a fire extinguishing head.

[Prior art]

A sprinkler fire extinguishing system installed on the ceiling of a building is connected to a water supply pipe 2 extending parallel to the ceiling surface of each floor, for example, through a water supply main 1 extending from a water supply source to the top and bottom of the building, as shown in Figure 1. A branch pipe 3 is branched from this water pipe 2, and in this branch pipe 3, a plurality of unwinding pipes 4 extend from the attic toward the ceiling surface at predetermined intervals, and each has a fire extinguishing head at its lower end. 5 is attached.

Since these pipings are installed in the ceiling, conventional ceiling beams are either bypassed on the underside of the beams, or a sleeve for pipe penetration is buried in the beams in advance during building construction. At the time, piping work was carried out by passing pipes through this sleeve.

[Problem that the invention attempts to solve]

Piping work using the conventional methods described above is extremely difficult and requires work such as measuring pipe dimensions, penetrating a long pipe into a sleeve, and filling holes in the penetrating part in a narrow space under the ceiling. was significantly worsening.

[Purpose of the invention]

The purpose of this invention is to solve the above-mentioned problems, and to promote the prefabrication of piping, to improve workability by reducing the number of man-hours required at the piping site, and to provide piping that makes it possible to reduce construction costs. It's in the method.

[Features of the invention]

In order to achieve this object, this invention buries a pipe that bypasses a building beam or a fire wall in advance during building construction, and then connects the joints provided at both ends of the buried pipe during piping work. A feature of this system is that piping for the beam or firewall can be done by connecting piping.

〔Example〕

Next, the piping method of the present invention will be explained in detail based on drawings showing embodiments.

FIG. 2 shows a piping method for a ceiling beam portion, and FIG. 3 shows a cross-sectional view of a fireproof shutter portion using the piping method of the present invention.

In FIG. 2, reference numeral 6 indicates a ceiling beam, 7 indicates a reinforcing bar within the beam 6, 2 indicates a water pipe, and 8 indicates a buried pipe that bypasses the beam 6. In addition, instead of the water pipe 2, a branch pipe 3 shown in FIG. 1 may be buried in the beam 6. The buried pipe 8 of the beam 6 portion is provided with flanges 81 at both ends, and is installed in the slab in advance so that the flanges 81 substantially coincide with the lower surface of the slab before pouring concrete during building construction. This buried pipe 8
If it is made of iron, the outer peripheral surface should be treated with a corrosion-proof coating such as PVC, and it should be installed so that it does not come into contact with the reinforcing bars in the slab.

Buried pipe 8 buried in the slab in this way
may be connected to a pre-installed flange 21 of the water pipe 2 that intersects with the beam 6 during piping work.

FIG. 3 shows another embodiment in which the piping method of the present invention is used in a place where a fire prevention shutter 9 is installed on a beam 6, and the same parts are represented by the same symbols.

FIG. 4 shows an enlarged view of the flange portion in FIGS. 2 and 3, and in this embodiment, the flange 8
1 is welded to the buried pipe 8 and is provided with a plurality of internal threads. Further, the end of the water pipe 2 has a bent portion 23 that is expanded outward and bent, and a flange 21 is loosely inserted into the water pipe 2. The connection between the water pipe 2 and the buried pipe 8 is as follows:
The packing 10 is inserted between the flange 81 and the bent portion 23 of the water pipe 2, and then the floating flange 21
The connection can be made by inserting a bolt into a bolt hole provided in the flange 81 and screwing it into the female threaded portion of the opposing flange 81. Note that by leaving the flange 21 in a floating state, it becomes easier to align the holes of the bolts 11, but the present invention is not limited to such a joint.

〔Effect of the invention〕

As described above, according to the piping method of the present invention, piping work on ceiling beams of water pipes or branch pipes can be easily performed without requiring any skill, and joints of buried pipes or water pipes can be installed in advance at the factory. Because it can be manufactured using aluminum, it is inexpensive, has high quality, and has uniform strength.Furthermore, it has features such as not affecting the strength of the ceiling beam.

[Brief explanation of drawings]

Fig. 1 is an example of piping for a fire extinguishing system, Fig. 2 is an example of piping for a ceiling beam section according to the method of the present invention, Fig. 3 is another embodiment, and Fig. 4 is an example of the flange section of Figs. 2 and 3. An enlarged view of each is shown. 2... Water pipe, 6... Beam, 8... Buried pipe.

Claims (1)

[Claims] 1. A fire extinguishing system consisting of a water pipe extending under the ceiling of a building, a branch pipe branching from the water pipe, and a plurality of unwinding pipes connected at predetermined intervals to the branch pipe and having fire extinguishing heads attached. In this case, a pipe having joints at both ends is buried in advance in the slab above the ceiling beam as a part of the water distribution pipe or branch pipe that intersects with the ceiling beam, and the water pipe or branch pipe is connected to the joint at the time of piping. A piping method for a fire extinguishing system characterized by connecting and bypassing a ceiling beam.