JPH09100560A - Piping execution method and piping renewal method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to simply carry out execution work and renewal work of piping and to obtain comfortable execution state without waste. SOLUTION: A seamless main pipe 3 is inserted into a sleeve 2 with a slightly large diameter to the extent capable of being slid to use it as piping 1, the piping 1 is constructed on a building slab surface 4, and both ends of the main pipe 3 are respectively connected to a header 5 and a water supply faucet 6. The seamless synthetic resin main pipe 3 is inserted into the sleeve 2 fixed to the building slab surface 4, and in piping construction connecting both ends of the main pipe 3 to the header 5 and water supply faucet 6, the end of the main pipe 3 is cut to slightly draw the main pipe 3 from the sleeve 2, connection joints 8 connected to the header 5 and/or the water supply faucet 6 are renewed and, at the same time, a short portion of an extention pipe caused by cutting-off is connected to extend.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe construction method and a pipe renewal method.

[0002]

2. Description of the Related Art Conventionally, a sheath pipe construction method has been known as a construction method for a water supply pipe and a hot water supply pipe in a building. That is,
In this sheath pipe construction method, at the time of building a building, a sheath pipe is laid between the header and the water tap installed in this building, the main pipe is inserted into this sheath pipe, and both ends of the main pipe are used as headers. It was connected to the faucet.

Further, when renewing the pipe constructed by this sheath pipe construction method, after pulling out the main pipe completely from the sheath pipe, a new main pipe is inserted into the sheath pipe and connected to the header and the water tap. Was there. And this allowed the mains to be renewed without breaking the structure of the building.

[0004]

However, in the case of the above-mentioned conventional construction method, since the main pipe is inserted after the sheath pipe is constructed, when the main pipe is inserted, the inner peripheral surface of the sheath pipe and the main pipe are Friction is generated between the outer peripheral surface and the outer peripheral surface, resulting in resistance. Therefore, in order to reduce this friction, the diameters of the sheath pipe and the main pipe are made different from each other so that a sufficient gap is provided between the inside of the sheath pipe and the main pipe, and the number of bent portions of the sheath pipe is reduced. It was necessary to construct the sheath pipe so as to reduce the number of the sheath pipes or to construct the sheath pipe so that the bending radius of the sheath pipe becomes small.

Further, since the main pipe is inserted after the sheath pipe is constructed, there is a problem that the work is troublesome twice.

Furthermore, in order to reduce the insertion resistance of the main pipe, a difference of usually 5 mm or more is provided between the inner diameter of the sheath pipe and the outer diameter of the main pipe, so that a rapid flow rate change occurs in the main pipe. When the main pipe pulsates, the main pipe collides with the inner peripheral surface of the sheath pipe, which causes an unpleasant collision sound.

Further, since the main pipe used for this construction is usually a flexible pipe made of synthetic resin, it is not corroded or deteriorated, and water leakage may occur in the header and the water tap. Is the connection between the main and. However, in the case of the conventional updating method described above, even if there is no abnormality in the main pipe, the main pipe is replaced with a new one, so that the main pipe is wasted. Further, since the main pipe is completely removed and replaced with a new main pipe, there is a problem that the construction is troublesome.

The present invention has been made in view of the above circumstances, and can easily perform construction work and renewal work.
It is an object of the present invention to provide a pipe construction method and a pipe renewal method that can obtain a comfortable construction state without waste.

[0009]

The pipe construction method of the present invention for solving the above-mentioned problems is a sheath pipe in which a seamless main pipe has a slightly large diameter so that the main pipe can slide. The pipe is laid in a building, and both ends of the main pipe are connected to a header and a water tap, respectively.

Further, in the pipe renewal method of the present invention for solving the above problems, a seamless synthetic resin main pipe is inserted into a sheath pipe fixed to a building, and both ends of the main pipe are header and water supply. In the piping structure connected to the stopper, cut the main pipe at the end and pull it out a little from the sheath pipe, renew the connection joint with the header and / or the water tap, and connect the extension pipe shortened by the above cutting It is an extension.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the construction of the pipe 1.

That is, in this piping construction method, the portion of the sheath pipe 2 of the pipe 1 is fixed to the upper surface of the building slab 4, and both ends of the main pipe 3 are connected to the header 5 and the water tap 6, respectively.

As the pipe 1, a pipe in which the main pipe 3 is previously inserted in the sheath pipe 2 is used.

Of these, the sheath tube 2 is made of metal, synthetic resin, inorganic material or a composite material thereof, and has flexibility. It is also possible to use a foamed material such as a synthetic resin foamed material or an inorganic foamed material, or a material formed of a heat insulating material such as rock wool or glass wool.
The vertical cross-sectional shape of the sheath tube 2 may be circular, elliptical, quadrangular, triangular or the like. The horizontal cross-sectional shape of the sheath tube 2 may be a normal tube body having flat inner and outer surfaces as shown in FIG. 2 (a).
As shown in (b), the inner and outer surfaces may be corrugated, or as shown in FIG. 2 (c), the inner surface may be corrugated. As shown in FIG. 2 (d), it may be a tubular body in which corrugations are formed only on the outer surface.

On the other hand, the main pipe 3 is made of flexible metal or synthetic resin. However, the main 3
The outer diameter of the main pipe 3 is the same as the inner diameter of the sheath pipe 2 or within the range of 4 mm so that a large gap is not created between the main pipe 3 and the sheath pipe 2. A pipe having a smaller diameter than the inner diameter of the pipe 2 is used. If necessary, a lubricant such as oil or a surfactant may be present between the inner peripheral surface of the sheath tube 2 and the outer peripheral surface of the main tube 3.

As a method of constructing the pipe 1 thus configured, the sheath pipe 2 and the main pipe 3 may be manufactured individually, and the main pipe 3 may be inserted into the sheath pipe 2 later. Alternatively, the sheath tube 2 may be formed by extrusion so as to cover the outer peripheral surface of the main tube 3 manufactured in advance.

In this pipe 1, with the portion of the sheath pipe 2 fixed to the upper surface of the building slab 4 by a saddle member 7, a header 5 and a water tap 6 are provided at both ends of the main pipe 3 via connection joints 8, respectively. It is constructed by connecting to.

In this embodiment, the sheath pipe 2 of the pipe 1 is used.
3 is fixed to the upper surface of the building slab 4 by the saddle member 7, but may be embedded inside the building slab 4 as shown in FIG. It may be one that does. In some cases, the pipe 1 may simply be arranged on the upper surface of the building slab 4.

Further, the water tap 6 may be taken out from the wall plate portion 41 as shown in FIG. 4, or may be the floor plate portion 4.
It may be one which is designed to be taken out from No. 2.

According to this construction method, the sheath tube 2 is previously prepared.
Since the pipe 1 having the main pipe 3 inserted therein is used, compared with the conventional construction method in which the main pipe 3 is inserted into the sheath pipe 2 fixed to the upper surface of the building slab 4, only the process for inserting the main pipe 3 It is possible to reduce the number of construction man-hours on site.

Further, since it is not necessary to insert the main pipe 3 into the sheath pipe 2 later, the diameters of the sheath pipe 2 and the main pipe 3 are made different from each other so that the inside of the sheath pipe 2 and the main pipe 3 are separated from each other. There is no restriction such as providing a sufficient gap, constructing the sheath tube 2 so that the number of bent portions of the sheath tube 2 is small, or constructing the sheath tube 2 so that the bending radius of the sheath tube 2 is small, It can be installed on.

Further, since the outer diameter of the main pipe 3 is the same as the inner diameter of the sheath pipe 2 or smaller than the inner diameter of the sheath pipe 2 within the range of 4 mm, the main pipe 3 is used. Even if the main pipe 3 pulsates due to a sudden fluctuation in the flow of the main pipe 3, the main pipe 3 does not collide with the inner peripheral surface of the sheath pipe 2, and an unpleasant collision sound is less likely to be generated.

Further, since the main pipe 3 is formed slidably with respect to the sheath pipe 2, the main pipe 3 can be slightly pulled out from the sheath pipe 2 to perform the renewal work of the pipe 1.

Next, the updating method will be described.

First, when a leak occurs, the main pipe 3 is
Since it has a service life of about 0 years, the cause of the leakage can be determined to be the header 5 or the water tap 6 and the portion of the connection joint 8 with the main pipe 3. Of these, the connection joint 8 of the header 5 can be visually recognized from the inspection port 50. Therefore, if there is a leak in this portion, as shown in FIG.
The main pipe 3 is cut at the base end portion of the connection joint 8 of the header 5 to renew the connection joint 8 of the header 5, and the extension pipe 9 having a distance shortened by this cutting is connected to the connection joint 8
Connect through.

When there is no leakage in the connection joint 8 of the header 5, the main pipe 3 is cut at the base end portion of the connection joint 8 of the header 5 as shown in FIG. Pull out the main pipe 3 by pulling the water tap 6. Next, after cutting the main pipe 3 at the base end of the connection joint 8 of the water tap 6 to renew the connection joint 8 of the water tap 6, the main pipe 3 is returned into the sheath pipe 2. Then, the extension pipe 9 having a distance shortened by the cutting of the main pipe 3 is connected to the end portion of the main pipe 3 on the header 5 side via the connection joint 8.

Thus, in the case of this updating method, the main pipe 3
Since the new main pipe 3 is not pulled out completely, the main pipe 3 can be easily renewed without wasting the main pipe 3.

However, in the case of this updating method, the main pipe 3 has 2
Since it is assumed that the main pipe 3 has a useful life of about 0 years, the main pipe 3 must be made of a synthetic resin that is seamless and does not corrode or deteriorate.

[0030]

As described above, according to the pipe construction method of the present invention, since the pipe in which the main pipe is inserted through the sheath pipe in advance is used, the conventional construction method in which the main pipe is inserted after the sheath pipe is constructed. Compared to this, the construction man-hour can be reduced.

Further, since the main pipe is inserted in advance, a sufficient gap is provided between the inside of the sheath pipe and the main pipe by making the diameters of the sheath pipe and the main pipe different from each other. There is no restriction of constructing the sheath pipe so that the number of bent portions is small, or constructing the sheath pipe so that the bending radius of the sheath pipe is small, and the sheath pipe can be easily constructed.

Further, since the seamless main pipe is inserted into the sheath pipe having a diameter slightly larger than that of the main pipe so that the main pipe can slide, the flow in the main pipe may be abruptly changed. Even if the main pipe pulsates, the main pipe does not collide with the inner peripheral surface of the sheath pipe,
Unpleasant collision noise is less likely to occur.

Further, since the main pipe is formed slidably with respect to the sheath pipe, the pipe can be renewed by slightly pulling out the main pipe from the sheath pipe.

Further, according to the pipe renewal method of the present invention as defined in claim 2, since the main pipe is not completely pulled out to be a new main pipe, the main pipe is not wasted and the renewal work can be easily performed. It can be carried out.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing an outline of an overall configuration of a pipe in a construction state.

FIG. 2 is a horizontal cross-sectional view showing various types of sheath tubes.

FIG. 3 is a partially cutaway perspective view showing a fixed state of the sheath tube.

FIG. 4 is a partially cutaway perspective view showing a mounting state of a water faucet.

FIG. 5 is a process diagram illustrating a method for updating a pipe.

FIG. 6 is a process diagram illustrating another method of updating the pipe.

[Explanation of symbols] 1 Piping 2 Sheath pipe 3 Main pipe 4 Building slab (building) 5 Header 6 Water tap 8 Connection joint 9 Extension pipe

Claims (2)

[Claims] 1. A seamless main pipe is inserted into a sheath pipe having a diameter slightly larger than that of the main pipe so that the main pipe can be slid, and the pipe is laid in a building. A pipe construction method characterized in that both ends are respectively connected to a header and a water tap. 2. In a piping structure in which a seamless synthetic resin main pipe is inserted into a sheath pipe fixed to a building, and both ends of the main pipe are connected to a header and a water tap, the main pipe is at an end portion. Cut and pull out a little from the sheath pipe, update the header and or the connection joint with the water tap,
A pipe renewal method characterized by connecting and extending the extension pipe shortened by the above disconnection.