JP3042928B2 - Piping material for gas conduit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping material for a gas conduit.

[0002]

2. Description of the Related Art When a gas pipe is laid in the ground, as shown in FIG. 5, a pipe groove 01 is first excavated from the surface of the ground, a gas pipe 02 is laid on the bottom, and a pile of sand 03 is laid around the pipe. After the backfill, the gravel layer 04 is scattered on this, and then the odor pipe 0 for detecting gas when a gas leak occurs on it.
5 and a plurality of cable protection tubes 06 for inserting communication cables or optical fibers, etc., and then laying a protection iron plate 07 to prevent damage due to construction by other companies,
Finally, the upper part is backfilled with mountain sand.

[0003]

Therefore, there are the following disadvantages. a. Excavation of the buried trench and its backfill requires a great deal of time, effort and expense. b. Traffic regulation and safety measures need to be taken when constructing roads.

[0004] It is an object of the present invention to provide a piping material including a gas conduit piping which solves the above-mentioned disadvantages a and b.

[0005]

Means for Solving the Problems To achieve the above object,
Therefore, in the present invention, in the piping material for a gas conduit,
It consists of a double pipe structure of a pipe and a protection pipe, and this inner pipe and protection
A filler layer is filled between the inner tube and the tube, and the inner tube is
Projecting outside the protective tube and the filler
Integrated odor tube with odor hole together with cable protection tube in layer
Insert and fill both ends of this cable protection tube and odor tube
It is characterized by being exposed from the material layer.

[0006]

First, a pipe groove is excavated from the ground along a pipe line, a pipe material is laid in the pipe groove, and inner pipes of the respective pipe materials are welded to each other. In addition, both ends of the inner pipe are pre-processed for welding at a factory. Next, the cable protection tube and the odor tube are connected by a connection tube at the exposed portion .
Next, since the protection tube has a short interval at the connection portion of the piping material, a protection cover formed in, for example, a semicircle is placed over the connection portion of the protection tube. Next, the pipe groove is backfilled with mountain sand or the like.

[0007]

EXAMPLES showing <br/> the gas conduit pipe material according to the present invention in FIGS. 1 is an inner pipe (gas pipe), 2 is a protection pipe, 3 is a filler layer filled in the middle between the inner pipe 1 and the protection pipe 2, and both ends of the inner pipe 1 protrude from the protection pipe 2, Grooves 1a and 1b are preliminarily machined at both protruding ends.

[0008] 4 Odor tube is inserted into the filler layer 3 halved structure, 5 I cable protection tube der inserted into the filler layer 3, and both ends thereof exposed from the filler layer 3 ing.
The odor tube 4 of the embodiment has a half-split structure.
It may have a large number of odor holes.

FIGS. 3 and 4 show a piping method using the above-mentioned piping material . First, a pipe trench excavated along from the ground to the pipe line, down the piping material therein, both ends of the odor trachea 4 and cable protection tube 5 co When welding the inner tube 1 between respective husband
Each connection is made by a connection pipe 6, and then a semicircular protection cover 7 made of metal is formed so as to cover a gap between the protection pipes 2 from above.
, And in this state, the pipe groove is buried using mountain sand or the like. It should be noted that there is no problem even if the gas pipe is slightly rolled by using the flexible pipe as the connection pipe 6 . The protective cover 7 may be simply placed on the protective tube 2, may be fixed using an adhesive, or may be fixed outside the protective tube 2 using a tape.

[0010]

The effects of the present invention are as follows. a. In the piping material, since a protective tube is previously covered on the outside of the inner tube, and a cable protective tube or a gas odor tube is built in, it is only necessary to lay this piping material as it is in the piping groove. Therefore, it is not necessary to lay the gas pipe first, then lay the odor pipe and cable protection pipe, and then put the protective iron plate on it and then backfill it, as well as build the odor pipe inside the protection pipe. Gas
If there is a leak, be sure to catch the odor via this odor tube
So that it can be easily odor-collected as before.
There is no need to sow the gravel to設時. Therefore, labor on piping,
Time and expenses can be greatly reduced. b. Since the gap between the protective tubes is covered with the protective cover at the connection portion, there is no fear that this portion will be damaged by other work or the like. c. Since the inner pipe is entirely protected in the radial direction by the protective pipe, it is unlikely to be damaged by other works. d. If the piping material rolls, connecting the cable protection tube and the odor tube with a flexible tube will not cause a risk that the cable protection tube and the odor tube are displaced and cannot be connected.

[Brief description of the drawings]

FIG. 1 is a sectional view of a piping material according to the present invention.

FIG. 2 is a sectional view taken along line AA ′.

FIG. 3 is an explanatory view of a piping method for piping material according to the present invention.

FIG. 4 is a cross-sectional view of a connection portion of a piping material.

FIG. 5 is an explanatory view of a conventional gas pipe burying method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inner pipe 1a, 1b groove 2 Outer pipe 3 Filler layer 4 Odor pipe 5 Cable protection pipe 6 Connection pipe 7 Protection cover

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16L 9/18 F16L 1/02

Claims (1)

(57) [Claims] An inner tube and a protective tube have a double tube structure, and a filler layer is filled between the inner tube and the protective tube.
The inner tube has both ends protruding outside the protective tube
With odor hole with cable protection tube in the filler layer
The odor tube is inserted into the cable protection tube and the odor tube.
For gas conduits with both ends exposed from the filler layer
Piping materials.