JPH053563B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a remote monitoring device, and more particularly, a remote monitoring device for monitoring the inside of a small diameter pipe such as a pipe connected to a melting tank of a nuclear reprocessing plant. It is related to.

[Background of the invention]

In a highly radioactive atmosphere such as a nuclear power plant, workers cannot enter these areas. Therefore, in order to know the situation under the above-mentioned high radiation environment, conventionally, an industrial television camera is operated by a remote monitoring device.

One example of this is the "nuclear reactor monitoring system" shown in Japanese Patent Application Laid-Open No. 56-82492, but the remote monitoring device shown in Japanese Patent Application Laid-Open No. 56-82492 is mainly It is used to monitor the structures inside the nuclear reactor and the inner walls of the reactor vessel, and cannot deeply monitor the inside of small diameter pipes such as piping connected to the melting tank of a nuclear reprocessing plant.

However, in the pretreatment process of a nuclear reprocessing plant, the melting tank is subject to particularly severe chemical and thermal conditions and is prone to defects due to corrosion. There has been a desire for a remote monitoring device that can sufficiently monitor the inner depths of the piping connected to the tank.

[Purpose of the invention]

The present invention has been made in consideration of the above points, and is intended to be used in high radiation atmospheres or toxic atmospheres such as piping connected to the melting tank of a nuclear reprocessing plant. The present invention aims to provide a remote monitoring device with an unprecedented new structure that can deeply monitor the inside of small-diameter pipes connecting various containers, which are difficult for workers to enter, such as narrow spaces.

(Summary of the Invention) In order to achieve the above object, the present invention includes a moving part that moves up and down in a container to which a small diameter tube is connected, and an imaging mechanism provided in the moving part and including a television shooting tube and a fiberscope. In a remote monitoring device that monitors the inside of the small diameter pipe using a main body, the tip of the fiberscope is provided with an objective lens configured to be rotatable and a fiberscope guide roller, and the moving part is connected to the inner tube case and the outer tube case. The moving part includes a guide pipe extending from the inside of the inner cylindrical case and movable in the radial direction within the container, and connecting the guide pipe to the container of the small diameter pipe. means for rotating the inner cylindrical case so as to face the connecting portion, and the moving portion further includes feeding means for inserting the fiberscope into the small diameter pipe along the inside of the guide pipe. It is something.

In other words, in order to deeply monitor the inside of a small diameter tube connected to a container, when performing remote monitoring by inserting a fiberscope provided in the imaging mechanism main body into the small diameter tube, first, the moving part By moving the guide up and down within the container and rotating the moving part, the guide is made to face the connecting part between the small diameter pipe and the container.

After moving the guide pipe to the small diameter pipe connection side, the fiberscope is advanced along the guide pipe and inserted into the small diameter pipe.

Since a rotatable objective lens is provided at the tip of the fiberscope, it is possible to monitor the entire inner circumference of the small diameter tube.

Therefore, the inside of small-diameter pipes connecting various containers where workers cannot stand up under high radiation or toxic atmospheres, such as piping connected to the melting tank of a nuclear reprocessing plant, or in narrow spaces, etc. can be deeply monitored.

[Embodiments of the invention]

Hereinafter, the present invention will be explained based on an embodiment of the drawings. FIG. 1 is a cross-sectional view showing the overall configuration of a remote monitoring device according to the present invention, and FIG. In FIG. 1, 1 is a cylindrical container such as a melting tank of a nuclear reprocessing plant, and 2 is a small diameter pipe connected to the container 1, which is located inside the container 1. The case 3 of the remote monitoring device is connected to a wire 5 of a lifting mechanism 4 set in the opening of the container 1.

In FIG. 2, an imaging mechanism main body 6 consisting of a television image pickup tube 7 and a fiberscope 8 is installed in the case 3, and the monitor of the small diameter tube 2 connected to the container 1 is monitored by the imaging mechanism main body 6. A fiberscope 8 is inserted into the inside of the small diameter tube 2, and a rotatable objective lens 9 attached to the tip of the fiberscope 8 monitors the entire circumference of the inside of the small diameter tube 2. do. An imaging mechanism main body 6 consisting of a television image pickup tube 7 and a fiberscope 8 is moved up and down by a television image pickup tube drive mechanism 10 and a fiberscope feed roller 11, and is moved into a small diameter tube 2 connected to a container 1. When inserting the fiberscope 8, when the guide pipe drive mechanism 13 is activated to move the guide pipe 12 toward the small-diameter pipe connection side of the container 1, the fiberscope guide roller 14 attached near the tip of the fiberscope 8 moves. is guide pipe 1
2 and enters the small diameter pipe 2. 15 is a signal cable of a remote monitoring device, and 16 is a light guide. The light source of the fiberscope 8 is sent through the light guide 16 to an objective lens 9 located at the tip of the fiberscope 8. Reference numeral 17 indicates a center positioning mechanism for positioning the center of the imaging mechanism main body 6 within the container 1, and 3' indicates an inner case obtained by forming the case 3 into a double inner and outer cylindrical shape to drive the inner case rotation drive mechanism 18. Accordingly, the imaging mechanism main body 6
rotates in the horizontal direction of the container 1.

In FIG. 1, 20 indicates a remote control room partitioned by a shielding wall 19, and inside the remote control room 20,
A television monitor 21 and a remote control device 22 are provided, and the operation signal from the remote control device 22 is sent to each drive system through a cable 15, and the light source of the fiberscope 8 is also connected to the light guide 1.
6 and is sent to an objective lens 9 located at the tip of a fiberscope 8. The imaging mechanism main body 6 moves up and down inside the container 1 and rotates horizontally inside the container 1 to reach the target connection part of the small diameter tube 2, and reaches the innermost part of the small diameter tube 2. A fiberscope 8 is inserted to monitor the inside of the small diameter pipe 2, and the results are sent to the remote control room 2.
The image is displayed on the television monitor 21 inside 0.

[Purpose of the invention]

The present invention is as described above, and as is clear from the description of the illustrated embodiments, according to the present invention, under a high radiation atmosphere or a toxic atmosphere such as piping connected to a dissolution tank of a nuclear reprocessing plant, Furthermore, it is possible to obtain a remote monitoring device with an unprecedented new structure that can deeply monitor the inside of various container-connecting small-diameter pipes that cannot be accessed by workers, such as narrow spaces.

[Brief explanation of the drawing]

The drawings show an embodiment of the remote monitoring device according to the present invention, and FIG. 1 is a vertical cross-sectional view showing the overall configuration thereof, and FIG. 2 is a vertical cross-sectional view showing a partially enlarged main part of the device of the present invention. be. DESCRIPTION OF SYMBOLS 1... Cylindrical container, 2... Small diameter pipe, 3... Case, 3'... Inner case, 4... Lifting mechanism, 5...
...Wire, 6...Imaging mechanism main body, 7...TV image pickup tube, 8...Fiberscope, 9...Objective lens, 10...TV image pickup tube drive mechanism, 11...Fiberscope feed roller, 12...Guide Pipe, 13... Guide pipe drive mechanism, 14... Fiberscope guide roller, 15... Signal cable, 16... Light guide, 17... Center positioning mechanism, 18... Internal case rotation drive mechanism, 1
9... Shielding wall, 20... Remote control room, 21...
TV monitor, 22...remote controller.

Claims (1)

[Scope of Claims] 1. A moving part that moves up and down inside a container to which a small diameter pipe is connected, and a remote control unit that monitors the inside of the small diameter pipe using an imaging mechanism main body that is provided in the moving part and includes a television image pickup tube and a fiber scope. In the monitoring device, a rotatably constructed objective lens and a fiberscope guide roller are provided at the tip of the fiberscope, and the moving part is composed of a double cylinder including an inner case and an outer case. , the moving part includes a guide pipe extending from the inside of the inner cylindrical case and movable in a radial direction within the container, and a guide pipe configured to face a connecting portion of the small diameter pipe with the container. means for rotating the inner cylinder case, and the moving section further includes a feeding means for inserting the fiberscope into the small diameter pipe along the guide pipe. remote monitoring equipment.