JPH05106779A - Protective cover structure for buried pipe - Google Patents

Abstract

PURPOSE:To protect a buried pipe by means of a protective cover, and also detect a buried position of the buried pipe on which the protective cover is installed. CONSTITUTION:A holding member 3 forming a covered conductor holding part 8 is installed integrally on the outer peripheral surface of an approximately tubular cover body 2 provided with an installation opening 4 to a buried pipe by notching a part of the circular cylinder surface in the lengthwise direction.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, a protective cover for a buried pipe such as a gas pipe has been known. This protective cover is formed in a substantially tubular shape in which a part of the cylindrical surface is cut out along the longitudinal direction thereof, and by forcibly pushing the opening formed at the notched both ends of the protective cover into the embedded pipe, A protective cover can be attached to the buried pipe. As a result, when excavating the ground for road construction or the like, the buried pipe is prevented from being damaged even if it receives a shock such as a pickaxe (see Japanese Utility Model Publication No. 2-28315).

Therefore, at the time of excavation, it is not possible to know the existence of the buried pipe unless the excavation is carried out to the immediate vicinity.
Even if the existence of buried pipes is known in advance from the maintenance chart, it is dangerous to perform excavation work by mechanical digging, and it is necessary to perform the work by hand digging while paying close attention.

On the other hand, when a covered conductor is attached to the buried pipe and buried, and when excavating, a magnetic field is generated by passing an electric current through the covered conductor, and by detecting this magnetic field, the buried position of the buried pipe can be accurately and promptly. It is known to grasp, for example, as disclosed in Japanese Utility Model Laid-Open No. 58-178688, a device has been proposed in which a holding member having a holding portion for a covered conductor is held in an embedded pipe at an appropriate interval. ing.

[0005]

However, although such a buried pipe detection method can accurately detect the existing position of the buried pipe, when the ground is dug up and the buried pipe is approached, great care must be taken. Even when digging by hand, the risk of damaging the buried pipe with a pickaxe cannot be avoided.

The present invention has been made in view of such problems, and provides a buried pipe protective cover structure capable of accurately and promptly detecting the buried position of the buried pipe and protecting the buried pipe. To do.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided a substantially tubular cover body in which a part of a cylindrical surface is cut out along the longitudinal direction thereof to provide an opening for mounting in a buried pipe, and a covered conductor. The holding member is formed of a holding member, and the holding member is integrally attached to the outer peripheral surface of the cover body substantially parallel to the axis thereof.

[0008]

After the cover body of the protective cover is attached to the buried pipe through the attachment opening, the covered conductor is laid on the holding portion of the holding member integrally attached to the cover body.

As a result, at the time of digging back, it is possible to energize the covered conductor laid on the holding member to accurately detect the burial position of the burial pipe, and to protect the burial pipe from a shock such as a scoop by the cover body. be able to.

[0010]

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

A protective cover 1 is shown in FIG.
The protective cover 1 is composed of a cover body 2 that protects a buried pipe P such as a gas pipe, and a holding member 3 for the covered conductor W integrally attached to the cover body 2.

The cover main body 2 is formed in a substantially tubular shape in which a part of the cylindrical surface is cut out along the longitudinal direction thereof, and is attached to the embedded pipe P through an opening 4 formed at both end edges of the cover main body 2. can do. A plurality of ribs 5 are formed on the inner circumferential surface of the rib 5 at appropriate intervals along the longitudinal direction of the rib 5 to increase the axial rigidity and increase the bending strength. Further, ears 6 having a circular cross section are provided along the longitudinal direction at both end edges forming the above-described opening 4 to increase the strength of the edge portion and prevent the edge portion from being damaged.

The cover body 2 is preferably made of an impact resistant resin, for example, made of an impact modifier-containing vinyl chloride resin, and its inner diameter is formed to be slightly larger than the outer diameter of the joint connecting the buried pipe P. There is.

On the other hand, the holding member 3 is formed in a tubular shape in which a part of the cylindrical surface is cut along the longitudinal direction thereof to provide a cut groove 7, and the opening 4 formed in the cover body 2 described above. It is integrally attached to the tops of the opposing outer peripheral surfaces. The cut groove 7 of the holding member 3 is formed such that its inner end is in contact with substantially the inner diameter portion and gradually widens from the inner diameter portion in the radial direction. As a result, the coated conductor wire W can be fitted into the space (holding portion) 8 in the inner peripheral surface of the holding member 3 through the cut groove 7.

The protective cover 1 thus constructed can be attached to the buried pipe P by forcibly pushing the opening 4 of the cover body 2 into the buried pipe P. Then, by inserting the coated conductive wire W through the cut groove 7 formed in the holding member 3, the coated conductive wire W can be laid on the holding portion 8 (see FIG. 3). After that, the buried pipe P and the protective cover 1 attached to the buried pipe P can be buried by covering with the earth and sand.

On the other hand, when it is necessary to know the buried position of the buried pipe P when the ground is dug back due to road construction or the like, an electric current is passed through the covered conductor W as in the conventional case, and the magnetic field generated thereby is generated. It should be detected. If the buried position of the buried pipe P is grasped in this manner, mechanical digging may be performed until the buried pipe P is approached, and if excavated to some extent, manual digging with a scoop may be performed. Even when the protective cover 1 is accidentally impacted during the work with the scoop, the buried pipe P itself is reliably protected without being damaged.

The holding member 3 is not limited to the tubular shape and is shown in FIG.
The trapezoidal cross section shown in FIG. 5 or the rectangular cross section shown in FIG. 5 may be used, and the shape is arbitrary. Further, it is preferable that the holding member 3 is formed at the same time when the cover body 2 is molded. However, in consideration of the manufacturing cost of the mold, the cover body 2 and the holding member 3 are separately molded, and these are bonded together. Alternatively, they may be integrally joined by fusion or the like.

[0018]

As described above, according to the present invention, a holding member having a holding portion for a covered conductive wire is integrally formed on the outer peripheral surface of a substantially tubular cover body provided with an opening for mounting in a buried pipe. By installing and configuring the protective cover, it is possible to energize the covered conductor laid on the protective cover to accurately and quickly grasp the buried position of the buried pipe when digging up. The excavation work can be performed efficiently, and since the buried pipe is covered by the cover body of the protective cover, it can be buried even if it is accidentally shocked by a scoop etc. The piping will not be damaged.

[Brief description of drawings]

FIG. 1 is a perspective view showing an overall configuration of a protective cover of the present invention.

FIG. 2 is an enlarged sectional view showing a holding member of FIG.

FIG. 3 is a perspective view showing a state in which a protective cover of the present invention is attached to an embedded pipe.

FIG. 4 is a partially enlarged cross-sectional view showing another protective cover.

FIG. 5 is a partially enlarged cross-sectional view showing another protective cover.

[Explanation of symbols]

 1 Protective Cover 2 Cover Body 3 Holding Member 4 Opening 7 Notch Groove 8 Holding Part P Embedded Pipe W W Coated Wire

Claims (1)

[Claims] 1. A substantially tubular cover body in which a part of a cylindrical surface is cut out along the longitudinal direction thereof to provide an opening for mounting in a buried pipe, and a holding member having a holding portion for a covered conductor. The protective cover structure for the buried pipe is characterized in that the holding member is integrally attached to the outer peripheral surface of the cover body substantially parallel to the axis thereof.