JP5545750B2 - Cable storage tube inspection device - Google Patents

Description

  The present invention relates to a cable housing pipe inspection device used for visual inspection of underground underground conduits in which cables are housed.

  Conventionally, there is a method of using a mandrel as a passability confirmation function as a method of a line passage / passage test. In this method, a mandrel having an outer dimension and a length dimension set in accordance with a pipe line to be inspected is prepared, and a mandrel is installed on one manhole side and pulled from the other manhole port, thereby allowing one manhole port to be It is possible to check the presence or absence of a passage impediment factor of the pipeline from the first to the other manhole port (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 6-60247

  Inspecting a pipeline with a mandrel is useful for a certain quality control, but is only a simple inspection technique. Furthermore, although the mandrel can be used in a conduit that does not contain a cable, it cannot be used as it is in a cable containing tube.

  In addition, as a technique for inspecting the inside of the pipe line in detail, if the pipe line does not contain a cable, for example, a method of installing a photographing camera on a mandrel and recording can be considered, but inspection of the pipe line already installed with a cable is also conceivable. Therefore, removing the cable is not an efficient inspection method.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a cable housing pipe inspection device used for visual inspection of underground buried pipes in which cables are housed.

The cable housing pipe inspection device of the present invention is a cable housing pipe inspection device for visual inspection of underground underground conduits in which cables are accommodated, and has external dimensions set according to the underground underground conduits and It has a mandrel shape of a length dimension, has a through hole for allowing the cable to pass in the mandrel-shaped pipe axis direction, and a tow rope is provided on at least one surface of the mandrel-shaped pipe axis direction. A plurality of imaging cameras for imaging and recording the inside of the pipeline and their camera heads , and each camera head of the plurality of imaging cameras is provided with the mandrel-shaped tube. Patent in road axis on the surface, is conformally disposed from each line axis centered around the through holes, that allow inspection around the pipe circumferential direction 360 degrees entire conduit of said cable To.

In cable housing tube inspection system of the present invention, a distance measuring unit for measuring the distance of the underground pipe, control for controlling the imaging by the plurality of imaging cameras in accordance with the position measured by the front Symbol distance measuring unit and parts, and a storage unit for storing data captured by the plurality of imaging cameras, the distance measuring unit, a body portion of said plurality of image pickup cameras, that it has built-in sealing the storage unit and the control unit Features.

  In the cable housing tube inspection device according to the present invention, each of the plurality of imaging cameras includes two imaging cameras each having a camera head having a wide angle lens with a field angle of 180 degrees.

  In the cable housing tube inspection device according to the present invention, each of the plurality of imaging cameras includes three imaging cameras each having a camera head with a wide-angle lens having a field angle of 120 degrees.

  The accommodation cable in the pipe is lifted up and a plurality of wide-angle camera heads allow inspection under the cable, which could not be inspected until now. In other words, it is possible to inspect the entire 360 degrees in the pipe circumferential direction including under the cable lifted up by the wide-angle lens even if the cable housing pipe inspection device body rotates or tilts during pulling in the pipe.

  In addition, the cable housing tube inspection device has a built-in storage unit, distance measuring unit, control unit, etc. so that the camera cord is eliminated, and the outer diameter of the device body itself has a mandrel function (passability function). Thus, detailed data can be recorded together with position information.

(A), (B) is the front view and sectional drawing of the cable accommodation pipe inspection apparatus of 1st Embodiment by this invention. It is the front view and sectional drawing of the cable accommodation pipe inspection apparatus of 1st Embodiment by this invention. It is a figure which illustrates the inspection aspect by the cable accommodation pipe inspection apparatus of 1st Embodiment by this invention. (A), (B) is the front view and sectional drawing of the cable accommodation pipe inspection apparatus of 2nd Embodiment by this invention.

  Hereinafter, with reference to drawings, the cable accommodation pipe inspection device of each embodiment by the present invention is explained.

[First Embodiment]
1A and 1B are a front view and a cross-sectional view of a cable housing tube inspection device according to a first embodiment of the present invention. FIG. 2 is a front view and a cross-sectional view of the cable housing tube inspection device according to the first embodiment of the present invention. FIG. 3 is a diagram illustrating an inspection mode by the cable housing tube inspection device according to the first embodiment of the present invention. The cable housing pipe inspection device 1 of the present embodiment is a device for visual inspection of underground buried pipes in which cables 80 are housed.

  The cable housing pipe inspection device 1 has a mandrel shape 10 having an outer dimension and a length dimension set in accordance with the underground pipe line 100. In addition, the cable housing pipe inspection device 1 has a through hole 20 for allowing the cable 80 to pass in the mandrel-shaped pipe axis direction, and the diameter of the through hole on the surface of the mandrel-shaped pipe axis direction. L1 is set to a size sufficient to pass the cable 80, and the mandrel-shaped diameter L2 is set to a size sufficient for confirming the passage of the pipe having the pipe diameter L3 of the underground pipe 100.

  The cable housing tube inspection device 1 is provided with tow ropes 60 and 70 for towing the device main body on at least one surface in the mandrel-shaped tube axis direction, and further an example of a light source that irradiates the inside of the tube. 3 sets of LED white light sources (LEDa1, LEDa2 set, LEDb1, LEDb2 set, LEDc1, LEDc2 set), and an imaging camera for imaging and recording in the center of each set of LED white light sources Camera heads 30a, 30b, and 30c are provided (see FIG. 1A).

  Further, the cable housing tube inspection device 1 is provided with a housing area 40 for incorporating devices necessary for imaging and a control unit 50 for controlling each device, specifically, the cable housing tube. The inspection device 1 captures and records the distance measuring unit 40b that measures the distance of the underground pipe line 100 configured by GPS, a laser method, and the like and the pipe lines corresponding to the camera heads 30a, 30b, and 30c. An imaging camera (not shown), a control unit 50 that controls imaging by the imaging camera according to the position measured by the distance measuring unit 40b, and a storage unit 40a that stores data captured by the imaging camera. The distance measuring unit 40b, the main body of the imaging camera, the storage unit 40a, and the control unit 50 are sealed and incorporated.

  That is, in the present embodiment, each of the plurality of imaging cameras is configured by three imaging cameras each having camera heads 30a, 30b, and 30c having a wide-angle lens with an angle of view of 120 degrees, and each of the camera heads 30a, 30b, and 30c includes: On the surface of the mandrel shape in the pipe axis direction, they are arranged equiangularly around the through hole 20 from the center of the pipe axis. As a result, the area where imaging is not possible due to the presence of the cable 80 is eliminated while the cable 80 is laid, and the inside of the entire pipe circumference of 360 degrees around the cable 80 can be inspected.

  Referring to FIG. 3, when inspecting the underground conduit 100 in which the cable 80 connecting the manholes M <b> 1 and M <b> 2 is accommodated, the tester H uses the tow ropes 60 and 70 to connect the cable accommodating tube. Only by pulling the inspection device 1, it is possible to image and record the state in the pipeline according to the pipeline position between the manholes M <b> 1 and M <b> 2. In FIG. 3, each camera head provided on the traction rope 70 side by pulling the cable housing pipe inspection device 1 connected by the traction rope 60 wound around the reel 90 with the traction rope 70 provided on the other surface. Although the example which images the inside of a pipe line by 30a, 30b, 30c is shown, it is not limited to this. That is, when the inside of the pipeline is imaged by the camera heads 30a, 30b, and 30c provided on the traction rope 70 side, the inside of the pipeline may be imaged when the reel 90 is wound up. A predetermined camera head may be provided on both of the tow ropes 60 and 70, and in this case, the state before and after the mandrel function is executed can be imaged.

  The cable housing pipe inspection device 1 is preferably a mandrel-shaped unit that can be divided into two in the pipe axis direction in consideration of ease of assembly. The cable housing pipe inspection device 1 can be installed in a relatively simple state with the cable 80 still laid by adopting a structure in which the cable 80 is sandwiched between each mandrel-shaped unit and then stopped with a screw or the like. it can.

  Next, with reference to FIG. 4, a cable housing pipe inspection device according to a second embodiment of the present invention will be described. In addition, the same reference number is attached | subjected to the component similar to 1st Embodiment.

[Second Embodiment]
4A and 4B are a front view and a cross-sectional view of a cable housing tube inspection device according to a second embodiment of the present invention. The cable housing tube inspection device 1a according to the second embodiment of the present invention is composed of two imaging cameras each having a camera head with a wide-angle lens having a field angle of 180 degrees as compared with the first embodiment described above. The only difference is that it includes all of the advantages and operation methods of the first embodiment.

  As a light source for illuminating the inside of the pipeline, two sets of LED white light sources (a set of LEDd1 and LEDd2 and a set of LEDe1 and LEDe2) are imaged and recorded in the center of each set of LED white light sources. Camera heads 30d and 30e of the imaging camera are provided (see FIG. 4A).

  As a 180-degree wide-angle lens, for example, a so-called fish-eye lens is known, and although it tends to be more expensive than the more commonly known 120-degree wide-angle lens, There are advantages such as weight reduction.

  According to the present invention, it is possible to inspect the entire mandrel effect and 360 degrees in the pipe circumferential direction, even in underground pipes in which cables are accommodated, and underground pipes in which cables are accommodated. This is useful for inspection.

DESCRIPTION OF SYMBOLS 1,1a Cable accommodation pipe inspection apparatus 10 Mandrel shape 20 Through-hole 30a, 30b, 30c, 30d, 30e Camera head 40b Ranging part 40a Storage part 50 Control part 60,70 Tow rope 80 Cable 90 Reel 100 Underground pipe line LEDa1-LEDe2 LED white light source

Claims (4)

A cable storage tube inspection device for visual inspection of underground underground conduits in which cables are stored,
It has a mandrel shape with an outer dimension and a length dimension set according to the underground pipe line,
Having a through hole for allowing the cable to pass in the mandrel-shaped pipe axis direction;
A pulling rope is provided on at least one surface of the mandrel shape in the pipe axis direction, a light source for irradiating the inside of the pipe, a plurality of imaging cameras for imaging and recording the inside of the pipe, and their camera heads are provided. It is,
Each camera head of the plurality of imaging cameras is equiangularly arranged from the center of the pipe axis around the through hole on the surface in the pipe axis direction of the mandrel shape,
A cable housing pipe inspection device characterized by enabling inspection of the inside of the entire pipe circumference of 360 degrees around the cable. A distance measuring unit for measuring the distance of the underground underground conduit ;
A control unit for controlling imaging by the plurality of imaging cameras in accordance with the position measured by the front Symbol distance measuring unit,
A storage unit that stores data captured by the plurality of imaging cameras;
The distance measuring unit, a body portion of said plurality of image pickup cameras, characterized by being built to seal the storage unit and the control unit, the cable housing pipe inspection apparatus as claimed in claim 1. The plurality of imaging cameras, each characterized by consists of two imaging cameras having a camera head angle 180 degrees wide-angle lens, the cable accommodating tube inspection apparatus according to claim 1 or 2. Each of the plurality of imaging cameras includes three imaging cameras each having a camera head with a wide-angle lens having a field angle of 120 degrees.
Characterized in that, the cable housing pipe inspection device according to claim 1 or 2.

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