JP3713363B2 - In-pipe imaging device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an in-pipe imaging apparatus for taking an image of an inner side of a pipe such as a pipe of an electric wire with an imaging means such as a video camera.
[0002]
[Prior art]
There is an in-pipe imaging device that is mounted (connected) and moved to an in-pipe self-propelled device (for example, Japanese Patent Laid-Open No. 6-293259) that self-runs inside the tube for inspection of the inside of the tube buried in the ground. . This in-pipe imaging apparatus is provided with an imaging means such as a video camera so that an operator can check the inside of the pipe on a monitor outside the pipe and confirm it.
[0003]
The self-propelled aircraft is made to go straight in the pipe, but it travels in a curved pipe, and it affects the axis of the pipe due to the influence of the contact pressure with the inner wall of the self-propelled section wheel. On the other hand, it may run while rotating.
[0004]
When the self-propelled aircraft rotates, the in-pipe imaging device attached to the self-propelled aircraft also rotates with the self-propelled aircraft. Then, the state in the tube that the video camera projects is also rotated and projected. As a result, even if you look at the monitor, you can't see the top, bottom, left, or right inside the tube. For example, even if a cracked part of the pipe is found, it cannot be determined whether the place is the upper part or the lower part of the pipe.
[0005]
Therefore, it was necessary to confirm the self-propelled aircraft and the in-pipe imaging device from the travel amount of the self-propelled aircraft, and actually dig up the location to confirm the cracks in the pipe.
[0006]
In addition, steel pipes (iron pipes) were often used for old pipes buried in the ground. However, in recent years, iron pipes are not preferred due to problems such as electromagnetic induction and durability, and old pipes are new. It is being replaced with a clay pipe.
[0007]
However, some old iron pipe burial records have been lost or lost during the war, and the exact burial position is unknown. Even if it is attempted to check with the in-pipe imaging device, it is extremely difficult to judge the material of the tube simply by looking at the monitor.
[0008]
[Problems to be solved by the invention]
Therefore, there is a need for an in-pipe imaging apparatus that can confirm the top, bottom, left, and right sides of a pipe projected on a monitor and that can determine from a monitor image whether or not a running pipe is an iron pipe.
[0009]
[Means for Solving the Problems]
The in-pipe imaging apparatus of the present invention has an imaging means (1) for imaging the state in the pipe (A), and a state display unit (7) is provided in the imaging range in front of the imaging means (1). The state display section (7) displays a hollow ring body having a hollow section (7a), and water (8) that is housed in the hollow section (7a) and movable in the hollow section (7a). The display body (9) has a float part (9a) and a magnet part (9b) for obtaining buoyancy.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to preferred embodiments.
[Example]
FIG. 1 is a side sectional view of the in-pipe imaging apparatus of the present embodiment, and FIG. 2 is a plan sectional view. In actual use, a self-propelled aircraft (not shown) is connected and used.
[0011]
In the figure, (A) is a tube to be inspected. (1) is a camera body as an imaging means, and includes a lens unit (1a) and an illumination device (1b). (2) is a cover to protect the camera body from damage and dirt. (4) is a camera control unit, which functions to change the orientation and posture of the camera by rotating the gears (11a) and (12a) by the motor (11) and the motor (12).
[0012]
(5) is a wash water tank that stores wash water. The washing water tank (5) is pressurized by the injected air. The pressurization state can be adjusted by an adjustment cock. When the electromagnetic valve (10) is opened, the cover (2) can be cleaned by spraying cleaning water onto the cover (2) through the cleaning nozzle (3). The reason for cleaning the cover (2) is that when the device passes through a dirty part in the pipe, such as where dirty water accumulates, the cover (2) becomes dirty and the image becomes unclear. is there.
[0013]
(6) is a guide, which is attached to make it easier to get over the joints of the pipes and the mud accumulated in the pipes as the in-pipe imaging device advances.
[0014]
(7) is a status display unit used for vertical display and iron pipe confirmation. This state display section (7) is provided with water (8) and a display body (9) in a hollow ring body made of a transparent resin such as vinyl chloride.
[0015]
FIG. 3 is a sectional view of the state display section (7). (7b) is an inner peripheral side wall, (7c) is an outer peripheral side wall, and (7a) is a cavity formed between both (7b) and (7c). Water (8) is placed in the cavity (7a), and the display body (9) floats on the water (8).
[0016]
The display body (9) includes a float part (9a) for providing buoyancy and a magnet part (9b) attached to the float part (9a).
[0017]
Since the state display unit (7) is located in the imaging range in front of the camera body (1), the state display unit (7) is displayed on the monitor together with the state in the tube. The water (8) always tries to be positioned below in the cavity (7a) due to gravity, and the display unit (9) floating on the water (8) is always positioned below together with the water (8). Therefore, it is clearly shown in the monitor image that the side where the display unit (9) is located is downward.
[0018]
As a result, the top and bottom can be confirmed on the monitor, but the upper side of the monitor does not necessarily indicate the upper side of the tube. In such a case, the camera body (1) may be rotated by the motor (12) so that the top and bottom of the monitor are aligned with the top and bottom of the tube.
[0019]
If a crack is found in the inner wall of the tube (A), the direction of the camera body (1) can be changed to the desired direction by the motor (11).
[0020]
In order to improve the visibility, it is preferable that a part or all of the display unit (9) has a color that can be easily seen.
[0021]
It is desirable that the amount of water (8) is such that the upper surface of the display unit (9) is not in contact with the inner peripheral side wall (7b). This is because if the display unit (9) is in strong contact with the inner peripheral side wall (7b), the display unit (9) may be caught and the smoothness of movement may be impaired.
[0022]
When the in-pipe imaging device advances through the pipe and enters the iron pipe, the magnet part (9b) of the display unit (9) is attracted to the iron pipe until it contacts the outer peripheral side wall (7c) against the buoyancy of the float part (9a) Move down. Since this state can also be seen on the monitor, the operator can recognize that the pipe (A) containing the in-pipe imaging device is an iron pipe at that time.
[0023]
Therefore, considering the buoyancy of the float part (9a) and the weight and magnetic force of the magnet part (9b), the display unit (9) floats in the water (8) under normal conditions, and when it is in the iron pipe It is necessary to adjust so that it may sink (it contacts an outer peripheral side wall (7c)).
[0024]
【The invention's effect】
As described above, according to the present invention, it is possible to provide an in-pipe imaging apparatus that can confirm the top, bottom, left, and right sides of a pipe projected on a monitor and can determine from a monitor image whether a running pipe is an iron pipe. It was.
[Brief description of the drawings]
FIG. 1 is a side sectional view of an in-pipe imaging apparatus according to an embodiment.
FIG. 2 is a plan sectional view of the in-pipe imaging apparatus according to the embodiment.
FIG. 3 is a cross-sectional view of a state display unit according to the embodiment.
[Explanation of symbols]
(1) Camera body (imaging means)
(2) Cover
(6) Guide
(7) Status display section
(7a) Cavity
(8) Water
(9) Display
(9a) Float part
(9b) Magnet part

Claims (1)

It has an image pickup means for picking up an image inside the tube, and a state display section is provided in the image pickup range in front of the image pickup means,
The state display unit includes a hollow ring body having a hollow portion, water contained in the hollow portion and movable in the hollow portion, and a display body.
An in-pipe imaging apparatus, wherein the display body has a float part and a magnet part for obtaining buoyancy.

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