JP2001032336A - Concentrated piping structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concentrated piping structure in which construction work is facilitated, a piping length can be shortened and measures at a time when there is the possibility of freezing is facilitated. SOLUTION: In a detached house, a header 7 connected to a water-supply main pipe 9 is installed into a pit 6 having a fixed depth arranged under the first floor of a building, and branch pipes 10 are extended up to each position of water supply on the indoor side from the header 7. The branch pipe is composed of a crosslinked polyethylene pipe with a heat-insulating material. Drip holes 16, 18, 19 for preventing freezing are formed under the first floor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a centralized piping structure.

[0002]

2. Description of the Related Art As a centralized piping structure in a building such as a detached house, a water supply main pipe is connected to a header in a pit provided on the outdoor ground, and a branch pipe extends from this header to each indoor water supply position under the floor. (Japanese Patent No. 2892946). In this piping structure, a polybutene pipe is used as a branch pipe.

[0003]

However, in this centralized piping structure, since the header is provided outdoors, it is necessary to extend the branch pipe from the outdoor header across the foundation to beneath the floor. Despite the use, the construction was somewhat cumbersome. As well,
Since the branch pipe is extended from outdoors to indoors, the length of the branch pipe to be used becomes long, which is uneconomical, and there is also a problem that the water supply pressure loss increases.

Further, since the header is provided outdoors as described above, in a cold region or the like, if there is a possibility of freezing, draining of water from the header and the piping on the secondary side of the header is performed outside. There was also a problem that when the outside was covered with snow, it was necessary to go out during the cold to remove the snow and perform the drainage work.

The present invention has been made in view of the above-mentioned conventional problems, and provides a centralized piping structure which can be easily constructed, can shorten the piping length, and can easily cope with the possibility of freezing. Make it an issue.

[0006]

The above object is achieved by providing a header connected to a main water supply pipe below the first floor of a building, and extending a branch pipe from the header to each indoor water supply position. It is solved by the characteristic centralized piping structure. Needless to say, the term "water supply main" is used not only for the main pipe for tap water supply but also for the concept including the main pipe for hot water supply.

In this centralized piping structure, since the header is provided under the floor of the first floor of the building, it is sufficient to extend the water supply main pipe from outside to the floor below the foundation so that the construction can be easily performed. . Moreover, since the branch pipes may be extended from the header under the floor to the respective water supply positions indoors, the length of each branch pipe can be shortened, the branch pipe cost can be reduced, and the water supply pressure loss is small. Can be suppressed.

In addition, the freezing of water in the header and the piping on the secondary side of the header can be suppressed due to the heat retention under the floor. Furthermore, since it is under the first floor, piping work of the water supply main pipe from the outdoors to the header can be easily performed.

When the branch pipe is made of a resin pipe such as a cross-linked polyethylene pipe or polybutene pipe, the construction can be performed more easily than in the case of using a metal pipe because of its light weight. In particular, crosslinked polyethylene pipes are excellent in cold resistance (melting point: -70 ° C), heat resistance (no melting point) and long-term internal pressure creep performance, and are used as a water supply pipe for cold regions and for hot water supply. Can be suitably used as a water supply pipe. In addition, in the case of a polybutene tube, cold resistance (melting point: -20 ° C) is higher than that of a crosslinked polyethylene tube,
Although it is inferior in heat resistance (melting point: 120 ° C.), it is possible to perform heat fusion when connecting tubes by utilizing the low melting point.

[0010] When a heat insulating material is provided on the outer peripheral portion of the branch pipe, freezing of water in the branch pipe can be more effectively suppressed in a cold region or the like.

In the case where drainage for freezing prevention is provided under the floor of the first floor, when there is a possibility of freezing, water in the header and the pipe on the secondary side of the header is removed from the indoor side by this drainage. It can be pulled out, and there is a risk of freezing in a cold region. Even if the outside is covered with snow, it is possible to reduce the hard work of going out during the cold and removing water by removing snow.

In the case of a single-family house, a water supply pipe can be easily traversed in a building for a single-family house, and piping work in relation to the foundation can be facilitated.

The header is preferably provided in a pit of a predetermined depth provided on the underfloor base surface.

[0014]

Next, embodiments of the present invention will be described with reference to the drawings.

1 and 2 show a centralized piping structure applied to a detached house 1. Reference numeral 2 denotes a continuous foundation such as a cloth foundation, 3 denotes a floor on the first floor of the building, 4 denotes a space under the floor, and 5 denotes a base under the floor. A pit 6 having a predetermined depth on the underfloor base surface 5.
Are provided, and headers 7 and 8 are provided in the pit 6. Header 7 is for tap water, and header 8
Is for hot water.

A tap water supply main pipe 9 is connected to the tap water header 7 as a primary pipe, and the tap water main pipe 9 is connected to the tap water header.
Is extended from the inside of the pit 6 to the outside through the ground, across the foundation 2 of the building 1, and is connected to a water pipe (not shown). Also, a plurality of branch pipes 10 for tap water are connected to the header 7 as secondary pipes, and each branch pipe 10 is connected to each indoor water supply position 11 through the floor.
Has been extended.

A hot water supply main pipe 12 is connected to the hot water supply header 8 as a primary pipe, and the water supply pipe 12 is connected to the indoor or outdoor (not shown) from inside the pit 6 through the ground. Connected to water heater. Also,
A plurality of branch pipes 13 for hot water are connected to the header 8 as secondary-side pipes, and each branch pipe 13 is extended to each indoor hot water supply position under the floor, though not shown. I have.

As shown in FIG. 3, each of the branch pipes 10,..., 13 is a cross-linked polyethylene pipe with a heat insulating material provided with a heat insulating material 15 on the outer periphery of the cross-linked polyethylene pipe 14.
As the heat insulating material 15, for example, foamed polyethylene, polypropylene, or a composite of foamed polyethylene and polypropylene in the inner and outer layers is used.

As shown in FIG. 2, a drain is provided under the floor to prevent freezing. That is,
A water drain valve 16 is interposed in the tap water supply main pipe 9 in the underfloor area, and a drain pipe 17 is connected to the tap water header 7. The drain pipe 17 is connected to the drain pipe 17 in the underfloor area. 18 are interposed. Further, a drain valve 19 is also provided in the hot water supply main pipe 12 in the underfloor region. Thereby, when there is a possibility of freezing, each of the valves 16, 18, and 19 is received from the indoor side.
, The water inside the headers 7, 8 and on the primary and secondary sides of the headers 7, 8 can be drained.

In the above-described centralized piping structure, the headers 7, 8
Is provided under the floor of the first floor of the building.
What is necessary is just to extend 12 from the outdoors under the floor across the foundation 2, and construction can be performed easily.

In particular, in the above embodiment, the header 7,
8 is provided in the pit 6 provided on the underfloor base surface 5, so that the plumbing work can be advanced in a stage before the construction of the upper structure of the building is performed, and under a narrow floor. Plumbing work can be reduced.

Further, in the present embodiment, the underfloor is used as the installation location. In particular, since the foundation 2 is made of a continuous foundation such as a cloth foundation, the underfloor space portion 4 is kept warmer in a cold region or the like than in the outdoors. In addition, since the headers 7 and 8 are provided in the pit 6 provided on the underfloor base surface 5, even if there is a possibility of freezing outdoors, the headers 7 and 8 and the inside of the secondary side piping and the like are provided. Water can be prevented from freezing. Then, if there is still a possibility of freezing, the drainage can be easily performed by the operation from the indoor side as described above.

Naturally, since the crosslinked polyethylene pipes are used as the branch pipes 10,..., They are excellent in workability, do not have to worry about red water, have a long life, and are excellent in heat resistance, cold resistance and the like. Needless to say. In addition, resin pipes such as cross-linked polyethylene may be used as the water supply main pipes 9 and 12.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various changes can be made without departing from the spirit of the invention. For example, in the above embodiment, a crosslinked polyethylene tube is used,
Various resin tubes such as a polybutene tube may be used.

[0025]

Since the present invention has been described above, the construction is easy, the pipe length can be shortened, and it is possible to easily cope with the possibility of freezing.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a centralized piping structure in a detached house.

FIG. 2 is a longitudinal sectional view showing details of a main part.

FIG. 3 is a cross-sectional view of a branch pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Detached house (building) 2 ... Foundation 4 ... Underfloor space part 5 ... Underfloor base surface 6 ... Pit 7 ... Header 9 ... Water supply main pipe 10 ... Branch pipe 11 ... Water supply position 14 ... Crosslinked polyethylene pipe 15 ... Heat insulation material 16, 18 , 19… Valve (water drain)

Claims (7)

[Claims] 1. A centralized piping structure, wherein a header connected to a main water supply pipe is provided under a floor of a first floor of a building, and a branch pipe extends from the header to each indoor water supply position. 2. The centralized piping structure according to claim 1, wherein said branch pipe comprises a crosslinked polyethylene pipe. 3. The centralized piping structure according to claim 1, wherein said branch pipe comprises a polybutene pipe. 4. The centralized piping structure according to claim 1, wherein a heat insulating material is provided on an outer peripheral portion of said branch pipe. 5. The centralized piping structure according to claim 1, wherein a drainage for preventing freezing is provided under the floor of the first floor. 6. The centralized piping structure according to claim 1, which is for a detached house. 7. The header according to claim 1, wherein the header is provided in a pit of a predetermined depth provided on the underfloor base surface.
The centralized piping structure according to any one of the above.