JP7412730B2 - Linear measurement device for buried pipes - Google Patents

Description

The present invention relates to a linear measuring device for buried pipelines, and in particular, a hollow rigid member is inserted into the buried pipeline, and a measuring section is inserted into the hollow rigid member and lowered to safely and reliably measure the linear measurement device. This paper relates to new improvements for measuring the entire pipeline.

An example of this kind of pipe measuring device that has been used in the past is the pipe measuring device disclosed in Patent Document 1, as shown in FIGS. 2 and 3, for example.
In FIG. 2, the symbol A indicates a conduit, and within this conduit A, a conduit running body 101 shown in FIG. It is configured so that it can be moved freely.

A cable 11 is connected to the conduit traveling body 101, and by winding and loosening this cable 11 with a winder 103, the conduit traveling body 101 can freely run within the conduit A. It is configured.
The winding machine 103 is provided with a distance meter 102 that converts the winding amount of the cable 11 into a distance, and the analog output from the distance meter 102 is converted into a digital output by a calculation device 104, and then It is configured to be digitally displayed on the display 105.

Incidentally, the pipe running body 101 is configured as shown in FIG. 3.
That is, an input/output terminal 8, an arithmetic unit 7, a triaxial acceleration sensor 5, and a triaxial gyro sensor 6 are provided in the housing 1, which has an almost oval overall shape. 2 and a rear wheel 3 are provided.

Therefore, by reciprocating the conduit traveling body 101 through the cable 11 in the conduit A in FIG. The signal is configured to be sent to the input/output terminal 8 via the arithmetic unit 7.

In the conventional configuration described above, an example was described in which the conduit running body 101 was run in a conduit A formed in a horizontal direction. The applicant has also developed a method of detecting the state of the conduit A by moving it up and down through the pipe.

JP 2017-15563 Publication

Since the conventional pipe line measuring device was configured as described above, the following problems existed.
That is, the conventional configuration shown in FIGS. 2 and 3 uses a conduit running body 101 that runs laterally in the conduit A that is provided almost horizontally, so that the conduit running body 101 is formed in the vertical direction underground. It was extremely difficult to apply this method to hard holes.
In addition, in the conventional configuration in which the measurement unit is vertically lowered to perform linear measurement of the underground pipeline, large earth pressure is applied to the underground pipeline. Therefore, depending on the situation, this earth pressure may cause a recess, that is, a deformed part of the buried pipe, to occur in a part of the buried pipe.
This deformed part of the buried pipe may protrude significantly inside the buried pipe, and in that case, the measuring part collides with this deformed part of the buried pipe, making it impossible to descend downward from there. It became impossible to continue measuring the pipe below the deformed section.

The present invention has been made to solve the above-mentioned problems, and in particular, it involves inserting a hollow rigid member into a buried pipe, inserting a measuring section into the hollow rigid member, and lowering the measuring section. It is an object of the present invention to provide a linear measuring device for buried pipelines that can safely and reliably measure the entire pipeline.

A linear measurement device for a buried pipeline according to the present invention is a buried pipeline in which the linear measurement of a buried pipeline that is driven vertically into the ground and buried is measured by a measurement unit that is moved by a cable. The linear measuring device has a hollow rigid member inserted into the buried pipe, the measuring section moves within the hollow rigid member , and the outer diameter of the hollow rigid member is equal to the diameter of the hollow rigid member. In a state in which the inner diameter of the pipe is half or less than half, and a buried pipe deformed part is formed in the buried pipe underground, the measuring part moves inside the hollow rigid member along the vertical direction. It has a structure that allows it to be moved .

Since the buried pipeline linear measuring device according to the present invention is configured as described above, the following effects can be obtained.
In other words, in a linear measurement device for a buried pipeline in which linear measurement of a buried pipeline buried underground is performed using a measurement unit moved by a wire cable, the hollow rigidity inserted into the buried pipeline is The measuring section is configured to move within the hollow rigid member, so that the measuring section can move stably within the hollow rigid member, and whether or not there is a deformed part of the buried pipe. Stable measurements can be made regardless of the
In addition, since the outer diameter of the hollow rigid member is half or less than the inner diameter of the buried pipe, any measuring part whose size is within the inner diameter of the hollow rigid member can be freely used. It can move up and down inside the hollow rigid member, and linear measurements of the buried pipe can be smoothly performed regardless of the deformed part of the buried pipe.

FIG. 1 is a configuration diagram showing the overall configuration of a linear measurement device for buried pipelines according to an embodiment of the present invention. FIG. 2 is a configuration diagram showing a conventional configuration. It is a block diagram which shows the specific structure of the conduit running body in the conventional structure of FIG.

The linear measuring device for buried pipes according to the present invention inserts a hollow rigid member into the buried pipe, and inserts the measuring section into the hollow rigid member and lowers the measuring unit, thereby safely and reliably measuring the pipe. This involves measuring the entire pipeline.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a linear measuring device for buried pipelines according to the present invention will be described below with reference to the drawings.
Note that the same or equivalent parts as in the conventional example will be described with the same reference numerals.
In FIG. 1, a symbol A indicates a buried pipe line buried underground B, and this buried pipe line A is usually an iron pipe.
The buried pipe A is deeply buried in the vertical direction in the underground B, and after being buried, the earth pressure C of the underground B is applied to the entire circumferential surface Aa of the buried pipe A. .

A hollow rigid member 200 is inserted into the buried pipe A, and a cable moving device consisting of a winder 103, a cable 11, and a plurality of pulleys 201 and 202 is installed on the surface Ba of the underground B. 203 is provided.
The cable 11 from the winder 103 is connected to the upper part 100a of the measuring section 100 in the hollow rigid member 200 inserted into the buried pipe A through the pulleys 201 and 202.

The outer diameter D1 of the hollow rigid member 200 is set to be half or less than half the inner diameter D2 of the buried pipe A, and the material of the hollow rigid member 200 is iron, stainless steel, aluminum, or hard resin. One of the following materials is used.

In the above-mentioned configuration, after the buried pipe A is driven into the ground B along the vertical direction D and inserted, in that state, the earth pressure C of the underground B causes the circumference of the buried pipe A to A concave-shaped buried conduit deformation portion 300 may be formed on the surface Aa.

Even after the buried conduit deformed portion 300 is formed in the above-described state, the hollow rigid member 200 does not undergo any deformation, so it can remain intact.
Therefore, even if the measuring section 100 is inserted into the hollow rigid member 200 via the cable 11 in this state, the measuring section 100 will not be affected by the buried pipe deforming section 300 and will not be affected by the hollow rigid member 200. It can freely move up and down within the member 200.
Since the length of the hollow rigid member 200 is set longer than the length of the buried pipe A, by moving the measuring section 100 up and down within the hollow rigid member 200 as described above, the length of the buried pipe A is set to be longer than the length of the buried pipe A. The linear state within path A can be measured freely, accurately, and quickly.

The linear measuring device for a buried pipeline according to the present invention is configured such that the measuring device can move up and down through a hollow rigid member in the buried pipeline. Even in the state where the deformable portion 300 is formed, the measuring portion 100 can perform vertical movement along the vertical direction D. Moreover, the linear measurement of the buried pipe A can be stably performed regardless of whether there is a deformed part of the buried pipe due to the earth pressure formed in the buried pipe.

11 Cable 100 Measuring part 100a Upper part 103 Winder 200 Hollow rigid member 201, 202 Pulley 203 Cable moving device 300 Buried pipe deformation part A Buried pipe Aa Surrounding surface B Underground Ba Surface C Earth pressure D Vertical direction D1 Outer diameter D2 Inner diameter

Claims (1)

A buried pipe in which the linear measurement of a buried pipe (A) that is driven into the ground (B) along a vertical direction (D) is measured by a measuring unit (100) that is moved by a cable (11). In linear measurement equipment for pipes,
It has a hollow rigid member (200) inserted into the buried pipe (A), and the measurement unit (100) moves within the hollow rigid member (200) ,
The outer diameter (D1) of the hollow rigid member (200) is half or less than half the inner diameter (D2) of the buried pipe (A),
In a state where a buried pipe deformed portion (300) is formed in the buried pipe (A) in the underground (B), the measurement unit (100) moves inside the hollow rigid member (200) in a vertical direction. (D) A linear measuring device for buried pipes, characterized by having a structure that allows movement along the line .

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