JPH10191522A - Camera head for inspecting inside of conduit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera head for inspecting the inside of a conduit capable of stably moving forward inside the conduit where a power cable is laid, of increasing the distance of a cable inserted and of obtaining good picture image. SOLUTION: A photographing member having a lens 31 is built in at the center of a single end portion of a camera head 30, two lamps 32 are arranged in up and down directions respectively at both the sides of the lens 31, thereby constituting a photographing portion 30b. Also at the camera head 30, two board-shaped supporting portions 30a separated to two legs from the photographing portion and extended downward are formed in one united body with the photographing portion 30b. That is, the supporting portion 30a of the camera head 30 is linked with the power cable in a conduit and its cross section forms a reverse U-shape so as to permit the movement in the longitudinal direction. Thus, the camera head 30 moves forward in a stable state inside the conduit, and thus the moving of the camera head 30 is not blocked, the situation inside the conduit can be monitored with a good image and any damage to the power cable by the camera head 30 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-pipe inspection camera head for inspecting a power cable or the like in a pipe in which a power cable is laid. The present invention relates to an in-pipe inspection camera head capable of performing a stable and obtaining a good in-pipe image.

[0002]

2. Description of the Related Art A power cable has a diameter of, for example, 60 m.
m, for example, the inner diameter is 130 m embedded in the ground
m. The pipe or the cable in the pipe is usually inspected by an in-pipe inspection device.

FIG. 5 is a schematic diagram showing an inspection device in a pipeline. 6 is a perspective view showing a conventional camera head for inspection in a pipeline, FIG. 7 (a) is a front view thereof, and FIG. 7 (b) is a side view thereof. As shown in FIG. 5, the camera head 14 includes
The push rod 4 wound around the reel 20 is connected, and the camera head 14 is connected to a monitor 24 and the like via an imaging cable 23 conducted inside the push rod 4. As shown in FIGS. 6 and 7, the camera head 14 has, for example, a cylindrical shape, and an imaging member (not shown) having the camera lens 2 is disposed at the center of the tip thereof. Around 2,
The lamp 3 is arranged.

In this in-pipe inspection apparatus, the camera head 14 is inserted into the pipe from the camera lens 2 side, and the camera head 14 is advanced by the push rod 4. At this time, the front of the camera head 1a is illuminated by the lamp 3 and the image by the imaging member is displayed on the monitor 24, so that the state in the pipeline or the surface state of the power cable in the pipeline can be monitored. it can. In particular, when monitoring the inside of the pipeline where the power cable is not arranged, the camera head 14 travels in the pipeline in a stable state, so that a good image in the pipeline can be obtained.

[0005]

However, when the camera head 14 is used to monitor the inside of the pipeline in which the power cable is arranged, various problems occur as described below. FIG. 8 is a cross-sectional view showing a position of a camera head traveling in a conduit in which a power cable is disposed, and FIG. 9 is a schematic diagram showing a traveling state of the camera head in a conduit in which a power cable is disposed. .

[0006] As shown in FIG.
Although three power cables 13a are arranged in 2, the camera head 14 may be caught between the power cable 13a and the inner wall of the conduit 12 and may not proceed. Further, as shown in FIG.
Even if the power cable 13b is arranged,
Similarly, the camera head 14 is easily pinched between the power cable 13b and the inner wall of the conduit 12. Therefore, there is a problem that the surface of the power cable 13a or 13b may be damaged, and the length of the wire cannot be increased.

[0007] Further, as shown in FIG.
When the camera head travels in the conduit 12 in which the 3b is arranged, for example, it travels upward through the gap 15 in the pipeline 12 (camera head 14a), or the power cable 13
In some cases, the light may travel downward between b and the inner wall of the pipe 12 (camera head 14b), and the traveling direction is not stable. Therefore, it is difficult to obtain a good image in the pipe 12.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and it is possible to stably travel in a pipeline in which a power cable is arranged, to increase a length of a line, and to obtain a good image. It is an object of the present invention to provide an in-pipe inspection camera head that can be obtained.

[0009]

An in-pipe inspection camera head according to the present invention is an in-pipe inspection camera head for inspecting the inside of a power cable duct, the imaging section having an imaging member on a distal end surface. And a support part that is bifurcated from the imaging unit and extends downward and has a shape that engages with the power cable movably in the longitudinal direction of the power cable.

According to another aspect of the present invention, there is provided an in-pipe inspection camera head for inspecting the inside of a power cable duct, comprising: an imaging section having an imaging member on a distal end surface; Divided into two forks and extended downward,
The power cable further includes a support portion interposed in a gap between the power cable and the pipeline so as to be movable in a longitudinal direction of the power cable.

In the present invention, a camera head is constituted by an image pickup section and a support section which is bifurcated from the image pickup section and extends downward, and this support section is movable in the longitudinal direction of the power cable. Since the camera head is engaged with the power cable or interposed in the gap between the power cable and the pipeline, the camera head travels along the power cable in a stable manner in the pipeline along the power cable without tilting. Therefore, since the camera head is not hindered from being caught between the inner wall of the conduit and the power cable, the line distance of the camera head into the conduit can be increased, and It is possible to prevent the camera head from damaging the power cable. In addition, since the movement of the viewpoint and the viewing angle of the camera (fatigue) is limited, it is possible to monitor the state in the pipeline or the surface state of the power cable in the pipeline with a good image in a constantly stable state.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the accompanying drawings. FIG. 1 is a perspective view showing a camera head for inspection in a pipe according to a first embodiment of the present invention. As shown in FIG. 1, an imaging member (not shown) having a lens 31 is built in the center of one end of the camera head 30, and on both sides of the lens 31,
Two lamps 32 arranged in the vertical direction are arranged, and constitute an imaging unit 30b. Further, the camera head 30 is formed with two plate-shaped support portions 30a which are bifurcated from the image pickup portion 30b and extend downward, and are integrated with the image pickup portion 30b. That is, the camera head 30
Means that the support portion 30a is engaged with the power cable in the pipeline,
The cross section is inverted U-shaped so that it can move in its longitudinal direction. Further, a push rod 33 to which an imaging cable or the like is conducted is connected to the other end of the camera head 30 so that an image from an imaging member can be transmitted to a monitor via the imaging cable. It has become.

FIG. 2A is a schematic plan view showing a state when the inside of a pipeline is inspected using the camera head 30, FIG. 2B is a front view thereof, and FIG. 2C is a right side view thereof. It is. However, in FIG. 2, the camera head 30 in the pipeline is
And the power cable 34 are indicated by oblique lines. As shown in FIG. 2, when inspecting the inside of the conduit 35 in which the power cable 34 is arranged, the camera head 30 is inserted into the conduit 35 from the distal end side, and while the power is being advanced, the camera head 30 is turned on by the lamp 32. Is illuminated forward, and the state inside the duct 35 is photographed by the imaging member. At this time, the support portion 30a of the camera head 30 is connected to the inner wall of the conduit 35 and the power cable 3.
4, the camera head 30 travels along the power cable 34 in the pipe 35 in a longitudinal direction in a stable state without tilting. Therefore, since the camera head 30 is not hindered from being caught between the inner wall of the conduit 35 and the power cable 34, the advancement of the camera head 30 into the conduit 35 by the pushing rod 33 is prevented. Passage distance is, for example, 150 m
The length of the camera head 30 can be increased.
Can prevent the power cable 34 from being damaged. In addition, since the movement of the viewpoint and the viewing angle (fatigue) by the imaging member is limited, the image by the imaging member is projected on the monitor via the imaging cable in a constantly stable state, and the state in the pipeline 35 or the pipeline. The surface condition of the power cable 34 in 35 can be monitored with a good image.

The present invention is not limited to the shape of the camera head shown in FIGS. 1 and 2, and the object of the present invention can be achieved by camera heads having various other shapes. FIG. 3 is a sectional view showing an example of the shape of the camera head according to the embodiment of the present invention. For example, as shown in FIG. 3A, the camera head 40 has a shape in which a U-shaped tip (supporting portion 40a) is slightly opened, and as shown in FIGS. 3B and 3C, As shown in FIG. 3D, there are camera heads 41 and 42 having a V-shape and a camera head 43 having a C-shaped curve.
a, 41a, 42a or 43a is shaped to engage with the power cable 44 in the conduit 45. Note that FIG.
In the camera head 41 shown in (b), the tip of the support portion 41a is formed in a cylindrical shape.

When the camera heads having various shapes shown in FIG. 3 are advanced in the conduit 45, the camera heads can be stably moved along the power cable 44 without tilting regardless of the shape. It travels in the longitudinal direction in the path 45. Therefore, similarly to the first embodiment, the power cable 44 can be extended without causing any damage to the power cable 44, and can be extended, and always in a stable state in the pipe 45 or in the pipe 45. The surface condition of the power cable 44 can be monitored with a good image.

FIG. 4 is a sectional view showing a state in which a camera head having the shape shown in FIG. 3 is used in a conduit in which a large-diameter power cable is arranged. The camera heads shown in FIGS. 4A to 4D correspond to the camera heads shown in FIGS. 3A to 3D, respectively. As shown in FIG. 4, even when a power cable 44a having a larger diameter than the power cable 44 is disposed in the conduit 45, the camera head 40, 41, 42 or 43 can be used. Yes, Figure 3
The same effect as in the case shown in FIG.

[0017]

As described in detail above, according to the present invention,
The camera head support is shaped to engage with the power cable movably in the longitudinal direction of the power cable, or is interposed in the gap between the power cable and the pipeline, so that the camera head is stable without tilting As a result, the camera head travels in the pipe in the longitudinal direction, the distance of the camera head into the pipe can be increased, and the camera head can be prevented from damaging the power cable. In addition, since the movement of the viewpoint and the viewing angle (fatigue) by the imaging member is limited, the state in the pipeline or the surface state of the power cable in the pipeline can be monitored with a good image in a constantly stable state. .

[Brief description of the drawings]

FIG. 1 is a perspective view showing an in-pipe inspection camera head according to a first embodiment of the present invention.

2A is a plan view showing a state when the inside of a pipeline is inspected using a camera head 30, FIG. 2B is a front view thereof, and FIG. 2C is a right side view thereof.

FIG. 3 is a cross-sectional view illustrating an example of a shape of a camera head according to the embodiment of the present invention.

4 is a cross-sectional view showing a state in which a camera head having the shape shown in FIG. 3 is used in a pipeline in which a large-diameter power cable is arranged.

FIG. 5 is a schematic view showing an inspection device in a pipe.

FIG. 6 is a perspective view showing a conventional camera head for inspection in a pipeline.

7A is a front view showing a conventional camera head for inspection in a pipeline, and FIG. 7B is a side view thereof.

FIG. 8 is a cross-sectional view showing a position of a camera head traveling in a pipeline in which a power cable is arranged.

FIG. 9 is a schematic diagram showing a progress state of a camera head in a conduit in which a power cable is arranged.

[Explanation of symbols]

2, 31; lens 3, 32; lamp 4, 33; push rod 12, 35, 45; conduit 13a, 13b, 34, 44, 44a; power cable 14, 14a, 14b, 30, 40, 41, 42, 4
3; camera head 23; imaging cable 24; monitor 30a, 40a, 41a, 42a, 43a; support 30b;

 ──────────────────────────────────────────────────続 き Continued on front page (72) Inventor Shigeki Yoshida 1-3-1 Uchisaiwai-cho, Chiyoda-ku, Tokyo Tokyo Electric Power Company (72) Inventor Hidetoshi Katahira 1-1-5-1 Kiba, Koto-ku, Tokyo Stock Inside Fujikura Corporation (72) Inventor Katsuhiko Ito 1-5-1, Kiba, Koto-ku, Tokyo Inside Fujikura Corporation (72) Inventor Nobuo Kobayashi 1-15-1 Kiba, Koto-ku, Tokyo Inside Fujikura Corporation

Claims (2)

[Claims] 1. An in-pipe inspection camera head for inspecting the inside of a power cable duct, comprising: an imaging unit having an imaging member on a distal end surface; And a supporting portion having a shape that engages with the power cable so as to be movable in the longitudinal direction of the camera head. 2. An in-pipe inspection camera head for inspecting the inside of an electric power cable duct, comprising: an imaging section having an imaging member on a distal end surface; A camera head for inspection in a pipeline, comprising: a support portion interposed in a gap between the power cable and the pipeline so as to be movable in a longitudinal direction of the camera.