JPH0443210B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a linearity inspection device for buried pipes, which accurately and efficiently measures the slope of buried pipes to determine its linearity and to check the condition of the box. This is something we try to understand precisely.

<Conventional technology> Conventionally, in order to determine the profile of a buried pipe, a rod called a sinking rod is attached to the buried pipe with its tip protruding above the ground, and the behavior of the buried pipe is determined by the movement of the rod. Ta.

However, because there are restrictions on the number and location of sinking rods, it has been extremely difficult to obtain an accurate profile of the buried pipe.

For this reason, Utility Model Publication No. 52-54648 or Japanese Patent Application Publication No. 58
No. 83211 proposes a device that allows an inclinometer to run directly inside a buried pipe and determines the behavior of the buried pipe based on the inclination value and the like during the travel. That is,
The former (Utility Model Application Publication No. 52-54648), as shown in Fig. 5, is a system in which the inclinometer 3 is made to run by pulling the tow rope 40' inside the buried pipe X where the manhole A is installed. , and the latter (JP-A-Sho
No. 58-83211), a hole is drilled at the end of the point to be measured, a pig 3' with an inclinometer 3 as shown in Fig. It is meant to run,
In both cases, the inclination value during the run is calculated by the electric wire cable 5
0 to a recorder 8 on the ground to detect the buried pipe profile.

According to these devices, it is only necessary to run the inclinometer 3 or the pig 3' inside the buried pipe X, so it is possible to accurately detect the buried pipe profile. However, on the other hand, there are the following problems. .

First, in the case of the device of JP-A-58-83211, when inserting the pig 3' into the pipe X, it was necessary to excavate a hole and cut the pipe line, which involved an extremely complicated process. On the other hand, the device of Utility Model Application No. 52-54648 utilizes manhole A and inserts the inclinometer 3 from there, so the steps of drilling a hole and cutting the pipe can be omitted; however, this device does not have manhole A. There was a problem in that it could only be applied to underground pipe lines, such as sewer pipes, and the field of application was extremely limited.

Furthermore, in both devices, the pig 3' or inclinometer 3 is inserted directly into the buried pipe X and run, so it is necessary to stop the line when measuring the pipe profile. In addition to not being able to measure it easily, it is also impossible to constantly monitor the pipes, making it difficult to quickly detect abnormal conditions such as underground pipes becoming dangerous due to ground subsidence, etc. It was becoming.

<Summary of the Invention> The present invention has been made to improve the above-mentioned drawbacks of the prior art, and aims to obtain an accurate buried pipe profile with a simpler operation.

The device of the present invention includes an inspection pipe that extends along the upper part of a buried pipe and is integrally connected to the buried pipe, an inclinometer that runs inside this pipe, and an inclinometer that uses data from the inclinometer to inspect the buried pipe. The system consists of a device that calculates the profile of a person.

The inspection pipe is installed along the top of the buried pipe and is integrally fastened to the buried pipe by a support member or the like, so that when the buried pipe sinks, it sinks and deforms along with it. Therefore, by measuring the deformation of this pipe, it is possible to know the amount of subsidence of the buried pipe. For this purpose, an inclinometer is run inside this inspection pipe to determine the inclination at an appropriate position. The apparatus is equipped with a device that calculates the profile of the buried pipe from this inclination value and the position of the inclinometer that obtained this value.

With this configuration, there is no limit to the number of measurement positions and measurement points, making it possible to measure as many times as necessary at the required positions.Also, since the inclinometer travels along the inspection pipe, Measurements can be made at any time without the need to stop the pipeline flow, and accurate profiles can be obtained with simple operation. Furthermore, constant monitoring has become possible, making it possible to detect abnormalities in buried pipes before they occur.

<Examples> Examples of the present invention will be described below based on the drawings.

In Fig. 1, X is an underground pipe and Y is a road surface.

An inspection pipe 1 is attached to the top of the buried pipe X. The inspection pipe 1 may be a square pipe or a round pipe, but in this embodiment, a square pipe is used to prevent the inclinometer 3 from turning. Fig. 2 shows the mounting structure of the pipe 1, in which a pedestal 10 is attached to the buried pipe X, and the pipe 1 is placed on top of it.
It is integrally fastened to the buried pipe X at a plurality of locations in the direction of the pipe center line using stainless steel bands 11. Each inspection pipe 1 has a length of approximately 200 to 300 m, and riser pipes 2 and 2' are continuously connected to both ends.

The riser pipes 2, 2' project into squares Z, Z' installed in the road surface Y, respectively, via guide pipes 20, 20. The riser pipe 2 and the guide pipe 20 are not fixed, and the riser pipe 2 is left free so that it can follow the behavior of the buried pipe X. This configuration also serves to protect the inspection pipe 1.

Connection part 2 between riser pipes 2, 2' and inspection pipe 1
1 has a large curvature so that an inclinometer 3 (described later) can pass therethrough, and a roller 2 is installed on the inner circumference side of the curve.
A plurality of wires 40 and cables 50, which will be described later, are prevented from being damaged. riser pipe 2,
2' is supported on the buried pipe X by a support stand 23 at this connecting portion 21.

An inclinometer 3 is inserted into the inspection pipe 1 and the riser pipe 2, and is configured to travel therein. A wire 40 is detachably attached to the front side of the inclinometer 3, and this wire 40 is connected to the winch 4 on the road surface through one of the riser pipes 2 and the square Z. The winch 4 is provided with a roller 41 of a length measuring device 7, so that the winding and feeding length of the wire 40 can be measured. The roller 41 includes a pair of slip prevention rollers 4.
2 and 44 are placed opposite each other to prevent the wire 40 from slipping. Further, it is desirable that the wire 40 be coated with nylon or the like to prevent slipping.

On the other hand, a cable 50 for transmitting the measured values measured by the inclinometer 3 is detachably connected to the rear side of the inclinometer 3, and is transmitted through the cable drum 5 through the other riser pipe 2' and square Z'. It is connected to the data processing device 6. The cable drum 5 is for letting out the cable 50 as the inclinometer runs, and for winding the cable after the measurement is completed.

A slope value signal from the inclinometer 3 is input to the data processor 6 via a cable 50, and a length measuring device 7
A winding length signal of the wire 40 is input from the terminal. The data processor 6 is configured to calculate the profile and stress of the buried pipe X from these two values.

In this embodiment, the inclinometer 3 can also measure the torsion of the buried pipe X, and its detailed configuration will be explained with reference to FIGS. 3 and 4.

This embodiment has a pair of inclinometer bodies 30 and 31. One main body 30 is mounted directly on a traveling carriage 32, and the other main body 31 is placed on a rolling device 33. A balance weight is attached to the rolling device 33 so that the trolley 32 remains horizontal even if it tilts in the radial direction. Therefore, the inclinometer 30 detects a radial inclination, that is, an inclination that includes a twist of the buried pipe X, while the inclinometer 31 detects an inclination only in the axial direction that cancels the twist. By comparing these two detected values, not only the inclination in the axial direction but also the torsion can be detected in the same way. The rolling device 33 is provided with a damper 34 to prevent vibrations caused by overrun of return rotation.

As shown in FIG. 4, a sled 320 is provided on the bottom and one side of the truck 32, and a leaf spring 321 is provided on the top and other side on the opposite side. As a result, the trolley 32 is pressed against one side of the pipe 1, allowing stable running, and as a result, accurate data can be obtained.

In this embodiment, on the front side of the traveling trolley 32,
A cleaning pig 35 is connected via a connecting device 36, and is configured to remove water and dirt from the pipe 1, thereby allowing smooth running.

Next, how to use it will be explained.

A wire 40 is passed through the pipe 1 in advance and brought out from the square Z' above the ground, and connected to the inclinometer 3. Then the cleaning pig 35 and the trolley 32 are connected to the pipe 1.
The wire 40 is wound up by the winch 4, the inclinometer 3 is run inside the pipe 1, the inclination value is sent to the data processing device 6 via the cable 50, and the length of the wire 40 is measured. Measurement is performed using a length instrument 7, and this value is similarly sent to the data processing device 6. The data processing device 6 calculates the profile and stress of the buried pipe X based on this value.

Further, in the riser pipe 2, the absolute value of the depth and sinkage amount of the buried pipe X can be obtained from the inclination thereof and the winding distance of the wire 40.

The inclination measurement by the inclinometer 3 may be carried out by stopping the inclinometer 3 at an arbitrary position each time, or may be carried out continuously while the inclinometer 3 is traveling. In either case, unlike conventional sinking rods, there are no restrictions on the measurement position or number of measurement points. In addition, since the inclinometer 3 runs inside the inspection pipe 1, there is no need to stop the flow of the buried pipe X for measurement.
Constant monitoring is also possible.

In the case of continuous measurement, if there is a concern about measurement errors due to vibration, a low-pass filter or the like may be provided in the data processing device 6 to remove noise.

When inclinometer 3 reaches the other square Z, inclinometer 3
Remove the cable 40, directly connect the wire 40 and the cable 50, wrap the cable drum 5 around it, and let the wire 40 come out again to one square Z' side so that it does not fall.

For the next measurement, repeat the above operation.

<Effects of the Invention> As explained above, according to the inspection device of the present invention, the inspection pipe is attached to the buried pipe and the inclinometer is run there, so that the measurement position of the buried pipe profile can be easily determined. There are no restrictions or restrictions on the number of measurement points, and accurate measurements can be made with simple operations. Furthermore, since there is no need to stop the flow of the buried pipe at all times during measurement, the condition of the buried pipe can be constantly monitored and abnormalities can be quickly detected.

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of the buried pipe linear inspection device of the present invention, Fig. 2 is a sectional view showing the installation structure of the inspection pipe, and Fig. 3 is a front sectional view showing details of the inclinometer. , FIG. 4 is a side sectional view thereof, and FIGS. 5 and 6 are explanatory diagrams showing the prior art. 1...Inspection pipe, 2...Rise pipe, 3...
Inclinometer, 4... winch, 5... cable drum, 6... data processing device, 7... length measuring device.

Claims (1)

[Claims] 1. An inspection pipe connected above and integrally with the buried pipe, an inclinometer running inside the pipe, and the position of the inclinometer inside the pipe and the inclination value at that position. 1. A linear inspection device for buried pipes, comprising: a device for calculating a profile of a buried pipe.