KR19990055739A - Location detection method of underground pipeline - Google Patents

Abstract

The present invention relates to a method for detecting the position of the underground pipe, and the conductive conductor is connected to the warning display tape inserted therein, the transmitter is supplied to the conductor by supplying an AC signal of a predetermined frequency to the conductor, and then flows into the conductor by a receiver on the ground. By detecting the signal current and the underground point of the underground pipe by detecting the signal current, it is possible to easily detect the location of the underground pipe and the point of damage when the underground pipe is damaged, thereby reducing the repair and repair time of the communication line. In addition, it is possible to shorten the installation time by quickly detecting whether the pipeline is broken during cable laying work, and also by accurately detecting the location of the underground pipe when the road is excavated, thus effectively preventing the damage of the pipeline. to be.

Description

Location detection method of underground pipeline

The present invention relates to a method for detecting the location of underground pipelines using a warning indicator tape. In particular, a method for detecting the damage location of underground pipelines to easily find damaged locations of pipelines or cables caused by various excavation projects in the underground pipeline facility section. It is about.

In general, in order to prevent damage to the underground pipeline and the communication cable by the excavation work using a variety of equipment and tools in the underground pipeline facility section where the communication cable is installed, a warning indicator tape is installed at the upper predetermined position of the underground pipeline facility.

In particular, if the underground pipeline is bent from side to side in a curved section, it is very difficult to know in which direction the pipeline passes, and if the pipeline is broken, it is much more difficult to find the exact point of damage.

In addition, most of the damage to the pipe or cable is generated by the excavation work of the road, the warning indicator tape is installed because the warning indicator tape is located above the underground pipe is damaged first.

Therefore, if the cutting point of the warning indicator tape is found, the damage location of the pipeline can be easily detected, but in reality, many excavation work is performed in the area where the underground pipeline facility is located, but the management personnel of the telecommunication service provider are present in all excavation works. In many cases, the excavation work is performed by the contractor alone, and the damage to the underground pipe is very frequent.

1 is a cross-sectional view showing a state in which the warning indicator tape is installed underground,

FIG. 2 is a perspective view of a warning display tape in which a conductive medium provided in FIG. 1 is inserted. FIG.

As shown in the drawing, the warning display tape 3 installed underground to prevent damage to the underground pipe 1 or communication cable (not shown) is directed from the top pipe of the underground pipe 1 to the ground surface. It is installed about 30cm long. That is, in the roadway, the underground pipeline 1 is buried in the basement 1 m or more in the ground 7, and is installed together at the top of 30 cm of the underground pipeline 1 and along the path of the underground pipeline 1.

In the illustrated warning indicator tape 3, two conductive conductors 7a and 7b are inserted into the vinyl tape 5, which strengthens the strength of the warning vinyl tape 3 and at the same time the conductor ( This is to flow current to 7).

And the upper surface of the tape (3) to write the phrase "communication communication cable" continuously to protect the communication facilities, such as installed underground.

On the other hand, as in the above case, the conventional method for finding the point of breakage of the underground pipe (1) due to excavation work or the like is as follows.

In other words, after connecting the transmitter which transmits the AC signal to the cable, the cable is attached to the end of the tumbler, the tumbler is continuously pushed into the pipeline, and then the signal level is detected by the receiver from the ground. Doing.

However, the conventional method is very inconvenient to push the barrel into the pipeline, it takes a lot of time to reduce the work efficiency.

Therefore, in order to solve the above problem, the present invention connects a transmitter to a warning display tape having a conductive conductor inserted therein, and supplies an AC signal of a predetermined frequency to the conductor, and then a signal current flowing through the conductor to a receiver on the ground. It is an object of the present invention to provide a method for detecting the location of an underground pipeline, which can easily detect the buried position and the damage point of the underground pipeline.

1 is a cross-sectional view showing a state in which a warning indicator tape is installed underground

FIG. 2 is a perspective view of a warning display tape having a conductive medium installed in FIG. 1 inserted therein; FIG.

3 is a schematic diagram for explaining the principle of detection of underground buried material according to the method of the present invention;

4 illustrates a method for detecting the location of underground buried material in accordance with the method of the present invention.

5 is a cross-sectional view showing a state in which the transmitter and the conductor in the underground pipeline section in accordance with the method of the present invention

6 illustrates a method for detecting a damage location of an underground pipeline in accordance with the method of the present invention.

<Explanation of symbols for main parts of the drawings>

1: underground passage 3: warning tape

5: soil 7: conductive conductor

9: transmitter 11: receiver

13: Received signal level 15: Artificial

The method of the present invention for achieving the above object,

In the underground pipe line location detection method installed in the basement for the protection of underground pipeline facilities and communication cables, using a warning indicator tape provided inside the conductive pipe to find the buried position and damage point of the underground pipe line,

Supplying an alternating current having a predetermined frequency to the conductive conductor by connecting a transmitter to the warning display tape;

Detecting a magnitude of an AC signal flowing through the conductive conductor using a receiver on the ground;

And detecting the disconnection point of the warning display tape and the buried position of the underground pipe line based on the detected signal.

Hereinafter, the method of the present invention will be described in detail with reference to the accompanying drawings.

3 is a view showing the detection principle of underground buried material according to the method of the present invention.

As shown in the figure, the transmitter 9 supplies the conductor 9 and the ground to detect the AC signal of the contracted frequency with the receiver, so that the transmitted current is fed back through the cable and the ground, thus becoming one super large coil. .

At this time, the receiver can detect the transmitted current flowing through the conductor 7 and analyze the position by the phase or the reception level of the signal current to know the depth and direction of the conductor 7.

4 is a view showing a method for detecting the location of underground buried in accordance with the method of the present invention.

As shown in the figure, the level (acoustic) 13 of the signal sensed by the receiver 11 has the highest peak around the conductor 7 and is therefore the minimum value directly above the conductor 7. The location of underground burial can be detected.

5 is a view showing a connection state of the transmitter 9 and the conductor 3 in the underground pipeline section.

As shown in the figure, one end is connected to the signal terminal of the transmitter 9 and the other end is connected to the ground wire 17 by using only one of the conductors 7a and 7b inserted in the warning display tape 3. do.

The remaining terminal of the next transmitter 9 is connected to the ground line 17 to form a circuit as shown in FIG. 3.

6 is a diagram illustrating a method for detecting a damage location of an underground pipeline according to the method of the present invention.

In general, when the underground pipe (1) is damaged, most of the warning indicator tape (3) is cut first, so by detecting the disconnection point of the warning indicator tape (3), it is easy to find the damage location of the underground pipe (1). .

As shown in the figure, the disconnection point detection of the conductor 7 inserted in the warning indicator tape 3 uses the reception level of the alternating current signal, and the origination point of the transmitter and the ground point of the conductor 7 (i.e. At the point of reception, the reception level becomes stronger and then suddenly weakens after passing through the point. In this case, the reception level becomes strong. Therefore, it can be seen that the underground pipe line 1 directly below the disconnection point of the warning display tape 3 is damaged.

As described above, the signal flowing through the conductor to a receiver on the ground after supplying an alternating frequency signal to the conductor by connecting a transmitter to a warning display tape having a conductive conductor inserted therein by the method of the present invention. The method of detecting the buried position and the damage point of the underground pipe by detecting the current can easily detect the buried position and the damaged point of the damaged underground pipe when the underground pipe is damaged, thereby reducing the repair and repair time of the communication line. In addition, it is possible to shorten the installation time by the rapid detection of whether the pipeline is broken during the cable laying work, and also to accurately detect the location of the underground pipeline when the road excavation, it can effectively prevent the damage of the pipeline.

Claims (3)

In the underground pipe line location detection method installed in the basement for the protection of underground pipeline facilities and communication cables, using a warning indicator tape provided inside the conductive pipe to find the buried position and damage point of the underground pipe line, Supplying an alternating current having a predetermined frequency to the conductive conductor by connecting a transmitter to the warning display tape; Detecting a magnitude of an AC signal flowing through the conductive conductor using a receiver on the ground; And detecting the disconnection point of the warning display tape and the buried position of the underground pipe line based on the detected signal. The method of claim 1, And detecting the depth and direction of the underground pipe line embedded with the sensed AC signal of the receiver. The method of claim 1, The method of detecting the position of the underground pipe line, characterized in that by detecting the disconnection point of the warning display tape to determine the damage location and excavation location of the underground pipe line.