JPH08201297A - Device for inspecting inside of receiving tank - Google Patents

Abstract

PURPOSE: To provide a device for inspecting the inside of a receiving tank, which can inspect the inner wall of the receiving tank efficiently and accurately without discharging liquid in the receiving tank. CONSTITUTION: An underwater camera 18, which images the inner wall surface of a receiving tank 12, is suspended from a double-barrel boat 16, which is floating on a water surface 14a inside the receiving tank 12. The underwater camera 18 can be moved at an arbitrary angle between the horizontal position and the vertical position in water 14b by a driving cable 28 based on the control of a control unit 20. Furthermore, the double-barrel boat 16 is moved into an arbitrary direction on a water surface 14a based on the control unit 20. The entire aspects of the inside of the receiving tank are imaged the underwater camera 18 by the movement of the double-barrel boat 16 and the horizontal/ vertical movement of the underwater camera 18, and the result is displayed on a monitor 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water receiving tank inspecting apparatus, and more particularly to a water receiving tank inspecting apparatus capable of inspecting and confirming the wall surface condition inside the water receiving tank while the liquid is stored in the water receiving tank.

[0002]

2. Description of the Related Art Conventionally, a water receiving tank, for example, a water tank installed on the rooftop or underground of a building or a storage container for storing a large amount of liquids such as chemicals and fuels, has aged deterioration of components constituting the tank or an earthquake. Due to the addition of an external force due to the above, a crack may occur on the outer wall surface or the inner wall surface of the water receiving tank. Although cracks on the outer wall can be easily inspected, it is not easy to find cracks on the inner wall and erosion of the inner wall due to the liquid stored in the water tank. In order to prevent liquid leakage due to cracks and erosion on the inner wall surface, the inside of the water tank is regularly inspected.

This regular inspection was performed by visual inspection after an operator entered the inside of the water receiving tank once the liquid had been discharged.

[0004]

However, since the conventional inspection of the inside of the water receiving tank is performed after the liquid inside the water receiving tank is once discharged, it takes a long time to discharge the liquid, the work efficiency is poor, and the liquid is It is necessary to stop the function as a water receiving tank while performing a series of operations such as discharge, inspection, liquid injection,
If the receiving tank is the water tank of the building, there is a problem that the building is temporarily cut off. In addition, the disposal of discharged liquid is not economically preferable.

Further, since the environment inside the water receiving tank slightly changes before and after the liquid is discharged, there is a problem that the inner wall surface condition in the actual use condition cannot be accurately determined.

The present invention has been made in order to solve the above problems, and an in-water-tank inspecting device capable of efficiently and accurately inspecting the inner wall surface of the water-in-tank without discharging the liquid inside the water-in-tank. The purpose is to provide.

[0007]

In order to achieve the above object, the present invention is, firstly, a boat that floats on the liquid surface inside a water receiving tank and can be moved in any direction, and is suspended from the boat. A camera unit that shoots images inside the water tank,
A camera moving mechanism that moves the camera unit in an arbitrary direction between a horizontal position and a vertical position in the liquid, a control unit that controls movement of the boat and the camera moving mechanism in a predetermined direction, and an image captured by the camera unit And a display for displaying an image of the inside of the received water tank.

A second feature is that the first water receiving tank inspection device further comprises an illuminating device for illuminating the photographing field of view of the camera section.

[0009]

According to the first configuration, the camera section capable of photographing the inner wall surface of the water receiving tank is suspended from the boat floating on the liquid surface inside the water receiving tank. The camera unit can be moved in the liquid at an arbitrary angle between a horizontal position and a vertical position by a camera moving mechanism. The drive amount of the camera movement mechanism and the movement amount of the boat are performed based on a command from the control unit, and the entire inner surface of the water receiving tank is photographed by the camera unit,
The image is displayed on the display.

Further, according to the second structure, since the illuminating device for illuminating the photographing field of view of the camera section is provided, a clear image can be obtained when the inside of the water receiving tank is photographed by the camera section. .

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view for explaining this embodiment, and FIG. 2 is a side view. As shown in FIG. 1 and FIG.
The inspection device 10 in the water receiving tank floats on the water surface 14a of the liquid, for example, the water 14 stored in the water receiving tank 12, and the water surface 14a
As a movable camera unit for taking a picture of the inner wall surface (bottom surface, side surface, etc.) of the water receiving tank 12 suspended from the catamaran boat 16 and underwater 14b. Underwater camera 18 and the catamaran boat 16
And a underwater camera 18, and a control unit 20 as a control unit for controlling the whole in-tank inspecting apparatus 10 and a monitor 22 as a display for displaying an image from the underwater camera 18. ing.

The control unit 20 and the catamaran boat 16 are connected by a covered cable 24, and a control cable for driving and controlling the catamaran boat 16 and a signal for transmitting a signal of the underwater camera 18 are provided inside. It has a cable 26. A drive cable 28 for changing the direction of the underwater camera 18 is also arranged in parallel with the covered cable 24. The drive cable 28 is controlled to be wound / unwound by a winding device (not shown) provided inside the control unit 20, and a link for supporting the underwater camera 18 via pulleys 30a and 30b provided at the tip of the catamaran boat 16. 32a. The link 32a is connected to the link 32c fixed to the catamaran boat 16 via the joint 32b. That is, the winding device, the pulleys 30a and 30b, the drive cable 28, the links 32a to 32c, etc. constitute a camera moving mechanism. Therefore, when the drive cable 28 is wound up, the link 32a rotates around the node 32b, and the underwater camera 18 moves in the direction of arrow A in FIG. On the contrary, if the drive cable 28 is extended, the underwater camera 18 moves in the direction of arrow B in FIG. 1, and the underwater camera 18 is moved to an arbitrary position between the vertical position and the horizontal position (range of about 90 °), for example. It can be moved. At this time, if the underwater camera 18 having a viewing angle of about 110 ° is selected, the catamaran boat 16 and the underwater camera 1 are selected.
By moving 8 as appropriate, the entire inner wall surface of the water receiving tank 12 can be photographed. On the other hand, the coated cable 24
The control cable inside is connected to a motor drive (not shown) of the catamaran boat 16 as shown in FIG.
Drive a and 34b respectively. In addition, the covered cable 2
The signal cable 26 for the underwater camera 18 in 4 is connected to the underwater camera 18 via the catamaran boat 16 and links 32a, 32b, 32c. The coated cable 24,
It is desirable that the control cable, the signal cable 26, the drive cable 28, etc. be waterproofed.

The control unit 20 is arranged on the ceiling portion 12a of the water receiving tank 12, and in addition to the above-described winding device for the drive cable 28, a covered cable 24 is provided when the catamaran boat 16 is moved. A winding device for controlling the winding / unwinding of the covered cable 24 may be provided so as to maintain an appropriate slack.

An operation procedure of the water receiving tank inspection device 10 configured as described above will be described. The control unit 20 is arranged on the ceiling portion 12a of the water receiving tank 12, and
From the water tank inspection port 36 to the catamaran boat 16 and the underwater camera 1
8 and the like are put into the water receiving tank 12. Then, while driving the underwater camera 18 and checking the image inside the water receiving tank 12 on the monitor 22, the control unit 20 is operated to move the catamaran boat 16 to a desired position. Catamaran boat 16
To move the boat forward or backward, the screws 34a and 34b are driven forward or backward simultaneously via the control cable, and when it is desired to change the direction of the catamaran boat 16, only one of the screws 34a and 34b is driven. Good.
On the other hand, the movement operation of the underwater camera 18 in the direction of arrow AB (see FIG. 2) is performed simultaneously with the movement of the catamaran boat 16 or in the stopped state before and after the movement of the catamaran boat 16 via the control unit 20 via the drive cable 28. The underwater camera 18 is moved. In this case as well, it is executed while checking the image inside the water receiving tank 12 on the monitor 22.

As described above, the catamaran boat 16 and the catamaran boat 1 capable of moving the liquid surface stored in the water receiving tank 12 in any direction.
By observing the inner wall surface of the water receiving tank 12 in a state where the liquid is stored in the water receiving tank 12 by the underwater camera 18 suspended from 6 and movable at any angle between the horizontal position and the vertical position. Therefore, it is possible to perform highly accurate inspection inside the water receiving tank.

Further, if an illuminating device 38 for illuminating the photographing field of view of the underwater camera 18, for example, an underwater illuminating device using an optical fiber or a halogen light is mounted on the tip of the underwater camera 18, when photographing the inside of the water tank, It becomes possible to obtain a clear image, and it is possible to perform a more accurate inspection in the water receiving tank.

In the present embodiment, an example using a double-hulled boat is shown, but a single-hulled boat having two screws may be used, or another moving device capable of moving the water surface in an arbitrary direction may be used. The same effect can be obtained.

Further, in this embodiment, an example in which the winding device for the drive cable for moving the underwater camera in the vertical-horizontal direction is provided in the control unit has been described, but it is placed outside the control unit, for example, on the ceiling of the water tank. It may be possible. Alternatively, the winding device may be mounted on the catamaran boat. In this case, the cable between the control unit and the catamaran is for electrical signals only,
In addition to being simple, the control unit and monitor can be installed in a management room in the building and operated remotely. However, in this case, it is necessary to take measures for waterproofing the winding device mounted on the catamaran boat.

Further, in this embodiment, an example in which an underwater camera having a viewing angle of about 110 ° was used and the link driving range was set to about 90 ° was shown. However, if necessary, the viewing angle is changed and the link is driven. Similar effects can be obtained by changing the range and using a CCD camera using glass fiber instead of the underwater camera.

[0021]

According to the in-water-tank inspecting apparatus of the present invention, the camera section capable of photographing the inner wall surface of the water-tank is suspended from the boat floating on the liquid surface inside the water-tank, and the camera section moves the camera. The mechanism allows movement in the liquid to any angle between a horizontal position and a vertical position. The driving amount of the camera moving mechanism and the moving amount of the boat are performed based on a command from the control unit, the entire surface of the inside of the water tank is photographed by the camera unit, and the image is displayed on the display. Therefore, it is possible to observe the inner wall surface of the water receiving tank in use finely and efficiently without discharging the liquid to the water receiving tank, and it is possible to perform highly accurate inspection inside the water receiving tank.

Also, since the camera unit has an illuminating device for illuminating the inside of the field of view of the camera, it is possible to obtain a clear image when the inside of the water receiving tank is photographed by the camera unit, and it is possible to obtain a more accurate image. In-tank inspection can be performed.

[Brief description of drawings]

FIG. 1 is a perspective view in which a part of an in-water tank inspection device according to the present invention is cut away.

FIG. 2 is a side view illustrating the configuration of the water tank inspection device according to the present invention.

FIG. 3 is an explanatory diagram illustrating a boat and a camera unit of the in-water tank inspection device according to the present invention.

[Explanation of symbols]

10 water tank inspection device, 12 water tank, 16 catamaran boat, 18 underwater camera, 20 control unit, 22 monitor, 24 covered cable, 28 drive cable, 32 link, 38 lighting device.

Claims (2)

[Claims] 1. A boat that floats on a liquid surface inside a water receiving tank and can move in any direction, a camera unit that is hung from the boat and shoots an image inside the water receiving tank, and the camera unit is in liquid. A camera movement mechanism that moves the camera in any direction between a horizontal position and a vertical position, a control unit that controls movement of the boat and the camera movement mechanism in a predetermined direction, and an image of the inside of the water tank taken by the camera unit. And a display for displaying, and a receiving tank inspection device characterized by including. 2. The in-water-tank inspecting device according to claim 1, further comprising an illuminating device for illuminating the photographing field of view of the camera section.