JP2892946B2 - Centralized piping structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centralized piping structure from a main pipe to a house, and more particularly to a piping technique in which a polybutene pipe is directly used for supplying water in a cold region.

[0002]

2. Description of the Related Art When a water supply pipe is branched from an in-house main pipe to various places indoors, the main pipe is conventionally led indoors, and branch pipes are made from the main pipe to each water supply position with steel pipes.

[0003]

However, when pipes are drawn indoors with steel pipes as in the prior art, it is necessary to connect the steel pipes with a large number of joints such as elbows and cheeses. Requires threading at the end of the steel pipe. For this reason, in the piping work, the thread cutting work is troublesome, and the reliability of the screwed portion is low. Also, in cold regions, it is preferable to arrange a branch position of the pipe near the antifreeze plug of the main pipe, but when such a pipe is made, a long distance is drawn around by a steel pipe, and the number of screwed points increases. The installation takes time and the reliability of the piping is further reduced.

[0004] In view of the above problems, an object of the present invention is to provide a piping system using a polybutene pipe, which is simple and reliable even if the branch pipe is routed long. It is to provide a piping structure.

[0005]

In order to solve the above-mentioned problems, in a centralized piping structure according to the present invention, a header connected to a main pipe in an outdoor pit, and a guide provided from the pit to the indoor. Pipes, a group of flexible sheathed pipes passed through the guide pipes and routed from the inside of the pit to the vicinity of each water supply position indoors, and each water supply position from inside the pit through each pipe of the group of sheathed pipes And a branch pipe made of polybutene that guides water from the main pipe supplied through the header to each water supply position indoors. That is, the present invention is characterized in that the branching position by the header is set to the outdoors, and the branching pipe is routed from there through the guide pipe and the sheath pipe.

In the present invention, for example, the guide tube is buried under the ground and disposed from the inside of the pit to the floor under the room.

[0007]

In the present invention, freezing can be dealt with since the branch position is set near the antifreeze plug outdoors. If such a piping structure is adopted, the length of the piping around the branch pipe becomes long. However, even in this case, in the present invention, the construction is simple and the reliability is high. In other words, the inside of the outdoor pit is set as a branching position from the main pipe, a header is provided there, and a guide pipe is disposed therefrom to a place under the floor indoors. And then into the room, and then a flexible branch pipe can be passed through the sheath pipe to make the pipe return. Therefore, it is not necessary to use a joint such as an elbow from the inside of the pit to the rising portion of the water tap, so that the construction is simple. Moreover, since there is no threaded portion, the reliability of the piping is high. On the other hand, in cold regions, administrative guidance is given that the water or hot water in the header and the piping on the header secondary side can be completely emptied with an antifreeze plug or drain valve. Since the header can be placed close to the valve, it can respond to such administrative guidance.

When renewing a branch pipe after construction,
After extracting the old branch pipe from the sheath pipe, the branch pipe can be updated from the pit to the water supply position only by inserting a new branch pipe into the sheath pipe. Further, even when it is necessary to connect the branch pipes, the branch pipes can be connected by fusion, so that the reliability of the connection portion is high.

[0009]

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an explanatory diagram showing the entire centralized piping structure of the present embodiment, FIG. 2 is an explanatory diagram showing the structure in a pit which is a branch position thereof, and FIG. FIG. 4 is a cross-sectional view schematically showing a connecting portion of FIG.

As shown in FIG. 1, the centralized piping structure 1 of this embodiment
In order to supply water to various parts of the indoor 10 in a house having the foundation of the air cycle structure, a concrete pit 30 is buried near the rear stage of the antifreeze plug 21 having a diameter of 20 m / m in the outdoor 11. The water from the main pipe 20 is distributed from a header 40 provided in the main pipe 20. Here, the main pipe 20 is a lining steel pipe having a diameter of 20 m / m. The header 40 is formed with a main pipe connecting part 41 to which the main pipe 20 is connected, and a plurality of branch pipe connecting parts 42 protruding from a side surface of the main pipe connecting part 41. Water is also supplied from the main pipe 20 to the boiler 26 outside 11, and the hot water from the boiler 26 is supplied to various parts of the indoor 10 via a hot water supply steel pipe of φ20 m / m and a header 40 in the pit 30. I have. The main pipe 20 has a water meter 25
Is interposed, and φ13 is also provided in front of the boiler 26 (water heater).
The m / m antifreeze plug 27 is inserted.

In the present embodiment, as shown in FIG.
, Two headers 40 are arranged, one of which is a water supply header to which water from the main pipe 20 is supplied, and the other is a hot water supply header to which hot water from the boiler 26 is supplied. . Here, the drain valve is underground. Since the piping structure from the water supply header to the indoor water supply position and the branch piping structure from the water supply header to the indoor water supply position have the same structure, in the following description, the water supply piping structure will be described. Only the description will be given, and the description of the branch piping structure for hot water supply will be omitted.

Connected to each of the branch pipe connecting portions 42 of the header 40 are flexible branch pipes 51 made of polybutene. These branch pipes 51 are restrained by a holder plate 44. . Branch pipe connection part 42 and branch pipe 5
As shown in FIG. 3, a cap nut 43 is used for coupling with the cap 1. The polybutene pipe used for the branch pipe 51 is superior to a steel pipe as a water supply pipe, for example, having high strength even in a high-temperature atmosphere and excellent corrosion resistance. Each branch pipe 51 is passed through a sheath pipe 52 made of synthetic resin, which is also flexible. A cap 53 is fitted to an end of the sheath tube 52 through the branch tube 51,
The branch tube 51 is prevented from accidentally falling out of the sheath tube 53. In this example, the water supply path uses a blue sheath pipe, and the hot water supply path uses a red sheath pipe.

A branch pipe structure using such a branch pipe 51 and a sheath pipe 52 will be described below together with a construction method.

In FIG. 4, a guide pipe 54 made of a vinyl chloride pipe extends from the pit 30 to the indoor floor 12 below.
The guide tube 54 is open on the inner surface of the pit 30 and is open on the ground below the floor 12. Here, although the detailed illustration is omitted, the guide tube 54 is in a state of being loosely bent using a large bending elbow or the like. After disposing the guide tube 54 in such a state,
First, the sheath tube 52 is passed through the guide tube 54,
The reference numeral 2 extends through the floor plate 17 to a predetermined water supply position 15 in a predetermined state. At this time, in the case of a house provided with the foundation 18 having the air cycle structure, the sheath tube 52 can be easily wound around.

After such a state, FIG.
As shown in (b), the branch pipe 51 is guided to the sheath pipe 52 by passing the branch pipe 51 from the inside of the pit 30 into the inside of the sheath pipe 52 drawn to the predetermined water supply position 15. The pipe is routed to each water supply position 15 in the room 10.

At the water supply position 15, for example, as shown in FIG. 6, a branch pipe 51 and a sheath pipe 52 are raised on the back side of the wall plate 16, and as shown by an arrow B from a hole formed in the wall plate 16, as shown in FIG. The branch pipe 51 is pulled out, and a water tap 19 is attached to the end of the branch pipe 51 via an elbow 191 made of polybutene or the like. Here, an external thread and an internal thread are formed at a joint portion between the elbow 191 and the water tap 19. When configuring such a water supply portion, first, on the back surface of the wall plate 16,
For example, the elbow box 60 is fixed. This elbow box 60 has a sheath tube receiving port 6
1 and a branch pipe outlet hole 6 in the front.
2 are attached. Further, a decorative plate 64 is placed on the front surface of the fixing ring 63. Elbow box 60 having such a structure
In order to guide the branch pipe 51 from the underground box 30 to the mounting position (water supply position 15) of the fixing ring 63 by using the pipe, the sheath pipe 52 is guided from the pit 30 to the elbow box 60 through the guide pipe 54, and the sheath pipe 52 Are connected to the sheath tube receiving port 61 using the receiving port sleeve 64. In this state,
When the branch pipe 51 is pushed into the sheath pipe 52 from the side of the pit 30, the branch pipe 51 reaches the elbow box 60 along the inside of the sheath pipe 52, and draws out the branch pipe along the gentle bending internal passage. It is pulled out from the hole 62. Thereafter, the water tap 19 is connected to the branch pipe 51. The same applies to other water supply positions.

Thus, in the centralized piping structure 1 of the present embodiment,
Since the branch pipe 51 made of polybutene has flexibility, if the guide pipe 54 is arranged from the outdoor pit 30 to the underfloor 12, the sheath pipe 52 is passed through the guide pipe 54, and then the sheath pipe 52 By passing the branch pipe 51 inside 5,
The branch pipe 51 can be easily routed and piped. Therefore, it is not necessary to use a joint such as an elbow from the inside of the pit 30 to the rising portion of the water tap 19. Therefore, as in this example, the pit 30 near the antifreeze plug 21 of the outdoor 11 is set as a branch position to cope with freezing in a cold region. Easy. Moreover, since there is no threaded portion, the reliability of the piping is high.

Also, after the construction, after the old branch pipe 51 is pulled out from the sheath pipe 52, the branch pipe 51 from the pit 30 to the water supply position 15 is renewed simply by passing the new branch pipe 51 through the sheath pipe 52. Can be. Further, the branch pipe 5
Since 1 is made of polybutene, if connection is required, the connection can be made by heat fusion instead of threading, so that the reliability of the connection portion is high.

[0020]

As described above, in the centralized piping structure according to the present invention, the branch position is set near the outdoor antifreeze plug, and the sheath tube and the branch tube drawn from the outdoors to the room are flexible. It is characterized by using a pipe. Therefore,
According to the present invention, since the branch position is near the antifreeze plug in the outdoors, it is possible to cope with freezing, and even in the case of a long branch piping of the branch pipe as in such a piping structure, through the guide pipe and the sheath pipe, Construction is easy because branch pipes can be routed. Moreover, since there is no threaded portion, the reliability of the piping is high. Further, after extracting the old branch pipe from the sheath pipe, the branch pipe can be updated simply by inserting a new branch pipe into the sheath pipe. Furthermore, since the branch pipe is made of polybutene, even if connection is required, the connection can be made by heat fusion, so that the reliability of the connection portion is high.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram schematically showing a centralized piping structure according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a structure in a pit shown in FIG. 1;

FIG. 3 is a cross-sectional view schematically showing a connecting portion between a branch pipe and a header in the pit shown in FIG.

FIG. 4 is a cross-sectional view schematically showing a state in which a sheath tube is drawn in the centralized piping structure shown in FIG.

5A is a cross-sectional view schematically showing a state in which a branch pipe is passed through the sheath pipe, and FIG. 5B is a cross-sectional view schematically showing a state in which a branch pipe is passed through the sheath pipe. .

FIG. 6 is an explanatory view schematically showing a structure of a water supply portion in which a branch pipe is routed through the centralized pipe structure shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Centralized piping structure 10 ... Indoor 11 ... Outdoor 12 ... Below floor 15 ... Water supply position 16 ... Wall plate 21 ... Antifreeze plug 20 ... Main pipe 30 ... Pit 40: Header 41: Main pipe connecting part 42: Branch pipe connecting part 51: Branch pipe made of polybutene 52: Sheath pipe made of synthetic resin 54: Guide made of vinyl chloride pipe Tube 60 ・ ・ ・ Elbow box

Claims (2)

(57) [Claims] 1. A header connected to a main pipe in an outdoor pit, a guide pipe provided from the inside of the pit to the indoor, and a guide pipe passing through the guide pipe from the inside of the pit to near each water supply position in the indoor. The drawn flexible sheath tube group, and the piping from the main tube supplied through the header, being routed from the inside of the pit to each water supply position through each tube of the sheath tube group, A centralized piping structure comprising a polybutene branch pipe for guiding water to each indoor water supply position. 2. The centralized piping structure according to claim 1, wherein said guide pipe is buried underground and is disposed from inside said pit to under a floor in a room.