JPH05106765A - Buried piping structure - Google Patents

Abstract

PURPOSE:To facilitate connection of buried pipings and locate the buried position without using special parts by mounting a covering member in which a conductor wire is sealed integrally on the outer peripheral surface of the piping body made of synthetic resin. CONSTITUTION:A buried piping 1 consists of a piping body 2 such as gas pipe, and a covering member 3 in which a conductor wire W is sealed and which is mounted integrally on the piping body 2. The piping body 2 is made of a synthetic resin such as polyethylene. The covering member 3 is formed by a covering part 3a in which a conductor wire W such as copper wire is sealed, and a projected part 3b, the diameter of which is formed smaller than that of the covering part 3a, and the projected part 3b is mounted on the outer peripheral surface of the piping body 2 nearly parallel to the axis-line of the piping body. After the buried piping 1 is installed in an open-cut groove, the buried piping 1 is buried by covering it with earth and sand, and when the ground is dug up, current is made across both ends of the conductor wire W to detect a generated magnetic field.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buried pipe structure such as a gas pipe.

[0002]

2. Description of the Related Art Conventionally, a covered conductor is attached to a buried pipe, for example, a gas pipe, and buried, and when excavating, a magnetic field is generated by passing an electric current through the covered conductor, and the buried magnetic pipe is detected by detecting the magnetic field. It is known to accurately grasp the buried position of the. For example, the actual exploitation number 58-17868
As shown in Japanese Patent Publication No. 8, a holding member having a holding portion for the covered conductor is held at a suitable interval in the buried pipe, or as shown in Japanese Utility Model Laid-Open No. 51-21209. A device has been proposed in which a conductor is embedded and enclosed in the pipe wall of the pipe.

[0003]

However, in the method of sequentially sandwiching the sandwiching member in the embedded pipe, the sandwiching member must be prepared separately from the embedded pipe, and due to an error in the required quantity or forgetting to prepare, etc. In addition to causing trouble during burial, earth pressure acts on the covered electric wire suspended between the sandwiching members due to the exposed exposed conductor wire when backfilling the earth and sand, or due to earth pressure. There is a problem that the sandwiched member is displaced and the covered electric wire is cut.

Further, in the method of enclosing the conductor in the pipe wall of the buried pipe, when the buried pipe is connected, it is not possible to connect to the mating conductor, so that the laying position is limited and the end of the buried pipe is limited. When the parts are abutted against each other and fusion-bonded, the chamfering work is hindered.

The present invention has been made in view of the above problems, and it is possible to easily connect the buried pipe and to accurately grasp the buried position of the buried pipe without using new parts. It is intended to provide a buried piping structure that can be used.

[0006]

DISCLOSURE OF THE INVENTION The present invention comprises a buried pipe body molded of synthetic resin and a covering member enclosing a conductive wire. The covering member is provided on the outer peripheral surface of the buried pipe body substantially parallel to its axis. It is characterized by being attached integrally.

[0007]

Function: The embedded pipe is embedded in which the covering member enclosing the conductor is integrally attached to the embedded pipe body.

As a result, when connecting the buried pipe, the covering member can be separated from the pipe body without affecting the joining. In addition, since the conductor wire is enclosed in the covering member and is integral with the pipe body, even if the earth and sand are backfilled, cutting accidents of the conductor wire can be reliably prevented. You can grasp it accurately.

[0009]

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

FIG. 1 shows a buried pipe 1. The buried pipe 1 is a pipe body 2 such as a gas pipe, and a covering member 3 in which a conductor W is enclosed and integrally attached to the pipe body 2. It consists of The pipe body 2 is formed of a synthetic resin such as polyethylene as conventionally known.

On the other hand, the covering member 3 is formed of a covering portion 3a enclosing a conducting wire W such as a copper wire and a protruding portion 3b formed with a width smaller than the diameter of the covering portion 3a.
b is attached to the outer peripheral surface of the pipe main body 2 described above substantially parallel to its axis. Therefore, the projecting portion 3b can be cut by a commercially available cutter knife or the like to easily separate the covering member 3 from the pipe body 2, and the covering portion 3a of the covering member 3 can be peeled off to easily expose the conductive wire W. be able to.

After the buried pipe 1 thus constructed is installed in the excavated groove, the buried pipe 1 can be buried by covering it with earth and sand. At this time, since the covering member 3 enclosing the conducting wire W is integrated with the pipe body 2, a disconnection accident of the conducting wire W at the time of backfilling is reliably prevented. When these buried pipes 1 and 1 are to be joined together, as shown in FIG. 3, after the projection 3b of the covering member 3 of each buried pipe 1 is cut to an appropriate length and the covering member 3 is separated from the pipe body 2, The ends of the pipe bodies 2 and 2 are fitted into the insertion joint 4 and joined. Further, the covering portion 3a of the covering member 3 is peeled off, the exposed conductive wires W are connected to the outside of the insertion joint 4 via the connector 5, and fixed with a vinyl tape (not shown).

In this embodiment, the pipe bodies 2 and 2 are joined by using the insertion joint 4. However, a butt joint may be used, and the joining means may be fusion, adhesion or mechanical joining. It is not particularly limited.

On the other hand, when it is necessary to grasp the buried position of the buried pipe 1 when the ground is dug back due to road construction or the like, an electric current is applied to both ends of the conductor W as in the conventional case, and the magnetic field generated by the electric current is generated. Should be detected. If the buried position of the buried pipe 1 is ascertained in this way, the buried pipe 1
Machine digging until approaching to, and if it is excavated to some extent, it can be done by hand digging with a pickaxe.

Further, when the pipe body 2 is molded, it is preferable to simultaneously mold the covering member 3 while enclosing the conducting wire W, and extrusion molding with a crosshead die is particularly preferable.
The piping main body 2 and the covering member 3 may be separately molded in consideration of the manufacturing cost of the mold, and these may be integrally joined by adhesion or fusion.

In this embodiment, polyethylene is used for the buried pipe body, but other thermoplastic resin or thermosetting resin may be used.

[0017]

As described above, according to the present invention, a covering member enclosing a conductor is integrally attached to the outer peripheral surface of a main body of an embedded pipe such as a gas pipe formed of synthetic resin to form the embedded pipe. Thus, when excavating, it becomes possible to energize the conducting wire to accurately grasp the buried position of the buried pipe, and it is possible to efficiently perform excavation work by mechanical digging up to the nearest position. Further, since the pipe body and the covering member enclosing the lead wire are integrally attached in advance, it is not necessary to prepare a new component other than the pipe, and the lead wire is reliably cut when backfilling. To be prevented.

[Brief description of drawings]

FIG. 1 is a perspective view showing an overall configuration of a buried pipe of the present invention.

FIG. 2 is an enlarged cross-sectional view of the covering member of FIG.

FIG. 3 is an explanatory diagram when connecting buried pipes to each other.

[Explanation of symbols]

 1 Buried pipe 2 Pipe body 3 Covering member W Conductor

Claims (1)

[Claims] 1. A buried pipe body formed of synthetic resin,
A buried piping structure comprising a covering member enclosing a conductor, the covering member being integrally attached to an outer peripheral surface of a buried piping body substantially parallel to an axis thereof.