JP2000046284A - Buried pipe protecting cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability, prevent bulking, lighten a weight, and protect a buried pipe having a various kinds of pipe diameters with a simple kind by forming a cover body by a sheet comprising a fiber layer and an elastic body. SOLUTION: A buried pipe protecting cover 1 is constituted with a sheet formed by holding a fiber layer 3 made of high strength fiber formed in a sheet shape by means of jacket weave, braid weave, and the like from upper and lower sides by an elastic body 4 made of a rubber sheet. In the case where the buried pipe protecting cover 1 is applied to a gas leading pipe whose diameter is different from the diameter of the cover 1, when a gas leading pipe having a small diameter is applied, both end parts 6 of the buried pipe protecting cover 1 are deformed in the direction near the gas leading pipe 2 side. On the other hand, when a gas leading pipe having a large diameter is applied, both end parts 6 of the buried pipe protecting cover 1 are deformed in the direction going away from the gas leading pipe 2. It is thus possible to facilitate work and execution to a shape according to various kinds of pipe diameters. Its weight is lightened in comparison with a material made of steel, bulk is prevented, and workability in a job site is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for burying a pipe such as a synthetic resin gas pipe in the ground, for backfilling or for digging the ground after completion of the burial.
A buried pipe protection cover for preventing a buried pipe from being damaged or broken by a drilling tool such as a scoop, a pickaxe, a boring bar, and the like. And a buried pipe protection cover for protecting the pipe.

[0002]

2. Description of the Related Art Conventionally, this kind of buried pipe protection cover is made of a hard metal plate, formed in a cylindrical body having an inner diameter larger than the outer shape of the buried resin pipe, and covers the buried pipe with the protection cover. It was proposed to be installed in a state and buried.

[0003]

A buried pipe protection cover is
It is necessary to perform on-site construction in accordance with changes in the length, angle, direction, etc. of the buried pipe. According to the conventional buried pipe protection cover described above, since it is made of a hard metal plate, it is easy to take time for processing and construction, and the workability at the site is deteriorated,
During storage, there is a problem that it is bulky because it is stacked and stored, it is heavy during transportation, and it is necessary to prepare various shapes that match the pipe diameter. An object of the present invention is to provide a buried pipe protection cover which has good workability, is hard to be bulky, is lightweight, and can protect a single kind of buried pipe of various pipe diameters in view of the above drawbacks.

[0004]

A feature of the present invention is that the cover body is formed of a sheet made of a fiber layer and an elastic body.

[0005] A feature of the invention according to claim 2 is that the fiber layer is formed of one of Kevlar fiber and ultra-high-molecular polyethylene fiber.

A feature of the invention according to claim 3 is that the elastic body is rubber.

[0007] As described above, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

According to the feature of the first aspect of the present invention, the sheet is made of a high-strength fiber layer and a flexible elastic body at a position above the buried pipe at a distance. Since the cover is formed, even if another object tries to collide with the buried pipe, the other object first comes into contact with the protective cover, and as a result, the impact force accompanying the collision of the other object is reduced with high strength. In addition, since the protective cover having high elasticity can receive and absorb and absorb the impact, the buried pipe can be hardly damaged. Further, since it is formed in a flexible sheet shape, it can be stored in a state of being wound in the longitudinal direction, and can be easily processed and constructed into a shape corresponding to various pipe diameters. Therefore, the buried pipe can be prevented from being damaged by an external force, while being lighter and less bulky than a metal-made material and improving workability at the site.

According to the characteristic structure of the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, in addition to the high strength fiber, Kevlar fiber or ultra high molecular weight polyethylene fiber or the like is formed into a woven fabric. Since the fiber layer is formed, the reinforcing layer has a reinforcing effect and can prevent the buried pipe from being damaged by an extreme impact force. Further, among the high-strength fibers, Kepler fiber is strong against heat, so that it is possible to protect a buried pipe made of polyethylene pipe which is weak against heat from heat. Therefore, it is possible to protect the buried pipe from heat and prevent damage due to external force.

According to the characteristic structure of the third aspect of the present invention, in addition to achieving the functions and effects of the first or second aspect of the present invention, since the elastic body is formed of a rubber material, flexibility is improved. And the impact can be relaxed and absorbed, so that the buried pipe can be hardly damaged. Therefore, it is possible to prevent the buried pipe from being damaged by external force while improving the workability at the site.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, portions denoted by the same reference numerals as those of the conventional example indicate the same or corresponding portions.

FIG. 1 shows a buried pipe protection cover 1 of this embodiment.
Is buried underground together with a gas conduit 2 which is an example of a buried pipe, and FIG. 2 is a perspective view showing the buried pipe protection cover 1 in the first embodiment.

The buried pipe protection cover 1 is shown in FIGS.
As shown in the figure, the gas conduit 2 is formed in a substantially arc-shaped cross-section when viewed in the direction of the axis P of the gas conduit 2, and is provided along the longitudinal direction in a state of blocking the upper part and both sides of the gas conduit 2. is there. Therefore, there is no fear that the buried pipe will be damaged or broken by the digging from above and from the side when the buried pipe is dug by the digging tool after the completion of the burial.

As shown in FIG. 3, the buried pipe protective cover 1 comprises a fiber layer 3 made of a high-strength fiber formed in a sheet shape by jacket weaving, braid weaving or the like, and an elastic body 4 made of a rubber sheet. It is composed of a sheet 5 sandwiched and formed.

Next, the case where the buried pipe protective cover 1 of the embodiment is applied to gas conduits 2 having different diameters will be described. As shown in FIGS. The buried pipe protection cover 1 is concentrically arcuate with the gas conduit 2 so that the separation distance is approximately the same size above the gas conduit 2
Place. At this time, since the single buried pipe protective cover 1 having flexibility is used, a small-diameter gas conduit as shown in FIG. In this case, both ends 6 of the buried pipe protection cover 1 are deformed and arranged in a direction approaching the gas conduit 2 side. Also,
In the case of a large-diameter gas conduit 2 as shown in FIG. 4B, both end portions 6 of the buried pipe protection cover 1 are deformed and arranged in a direction away from the gas conduit side.

Since the buried pipe protective cover 1 is formed in a flexible sheet shape, as shown in FIG. 5, when it is stored, it is wound in a roll shape in the longitudinal direction. Can be stored.

[Other Embodiments] Other embodiments will be described below.

The buried pipe protection cover 1 of the present invention is not limited to the structure in which the fiber layer 3 is sandwiched between the elastic members 4 from above and below as described in the previous embodiment, but impregnates the fiber layer 3 with liquid rubber. It may be made to be. In addition, gas conduit 2
Is not limited to the one formed in a substantially arcuate cross section with the gas conduit 2 when viewed in the direction of the axis P, and may be bent into a U-shape.

[Brief description of the drawings]

FIG. 1 is a diagram showing a buried state of a buried pipe protection cover.

FIG. 2 is a perspective view of a buried pipe protection cover.

FIG. 3 is a cross-sectional view of a sheet forming a buried pipe protection cover.

FIG. 4 is a cross-sectional view showing a situation where the present invention is applied to buried pipes having different diameters.

FIG. 5 is a diagram showing a storage state of a buried pipe protection cover.

[Explanation of symbols]

 Reference Signs List 1 buried pipe protective cover 2 buried pipe 3 fiber layer 4 elastic body 5 sheet

Claims (3)

[Claims] 1. A buried pipe protection cover that is disposed around a buried pipe placed in the ground to protect the buried pipe,
A buried pipe protection cover in which a cover body is formed of a sheet made of a fiber layer and an elastic body. 2. The fiber layer according to claim 1, wherein the fiber layer is formed of Kevlar fiber or ultra-high molecular polyethylene fiber.
Buried pipe protection cover as described. 3. The buried pipe protective cover according to claim 1, wherein the elastic body is rubber.