JPS60169745A - Apparatus for inspecting inside of vacuum container - Google Patents

Abstract

PURPOSE:To obtain an apparatus for inspecting the inside of a vacuum container having excellent heat resistance, observing range and maintainability, by using an image guide instead of an ITV camera, and constituting an arm driving system so that an image-sensor part of the image guide can be provided at an arbitrary position in the vacuum container. CONSTITUTION:A driving part 1 drives the main body part 5a of an arm in the direstion of the axial center (Z axis) of a tubular structure 2, turns an arm tip part 5b around the Z axis through an arm turning part 6, and moves an observing part 7, which is mounted on a movable clock 18 through a cam follower 19 and a driving wire 5c along the axis of the tip part 5b. An image guide link 20 is provided so that the image guide 8 and a light guide 22 can be readily expanded and contracted when the position of the block 18 is changed. The structure 2 is linked to a port 4a, and the driving part 1 is controlled by an operating board 10. The observing part 7 is placed at a desired position by the vertical movement of the main body part 5a, by the turning of the tip part 5b around the Z axis and by the positioning of the block 18. Thus the observation can be performed. Therefore, the inspecting apparatus having the excellent observing range and maintenability can be obtained.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides, for example, a vacuum vessel for a nuclear fusion reactor, etc.
The present invention relates to a vacuum container interior inspection device for visual inspection to observe the condition inside the vacuum container, that is, the inner wall of the container, deformation or damage to any structure inside the container, etc.

[Prior art]

For this purpose, conventionally, an industrial television camera (hereinafter abbreviated as ITV camera) was inserted into the vacuum vessel, and the video signal from the ITV camera was transmitted to a monitor receiver installed outside the vacuum vessel. and displayed it on a monitor receiver. The ITV camera is attached to the tip of the tubular structure inserted into the vacuum vessel, and a tubular structure drive wire is provided to drive the position of the tubular structure in the axial direction within the vacuum vessel, and The observation field of view is changed by remotely controlling the automatic drive device of the camera head of the ITV camera from outside the tubular structure. Since it is difficult to change the position of the camera head to the position when observing in the radial direction perpendicular to the radial direction, the camera head was configured to be replaced manually in this case.

Furthermore, since the position of the ITV camera can only be changed in the axial direction of the tubular structure, there is a drawback that the camera position relative to the observation target cannot be freely adjusted.

Furthermore, while the ambient temperature under which normal operation of the I'ff camera is guaranteed is 60°C or less, the temperature inside the vacuum container may be around 250°C, and in such cases,
A disadvantage was that a large amount of cooling gas had to be passed through the tubular structure to cool the ITV camera. The light beam enters the ITV camera through a viewing window installed at the tip of the tubular structure, so the transparent glass used for this viewing window had to be able to withstand the temperature and pressure inside the vacuum container. . Additionally, lighting equipment is provided to illuminate the inside of the vacuum container.

The disadvantages of the conventional device using the above device are that it requires a large-capacity camera cooling device, there are problems with the durability of the ITV camera, maintenance and inspection of the cooling device, and when observing a tubular structure in the radial direction. The camera head must be replaced each time when observing the tubular structure in the axial direction, which reduces work safety and ease of maintenance, and limits the field of view due to the limited camera position. etc.

[Overview of the invention]

This invention was made in order to eliminate the drawbacks of the conventional ones as described above.In this invention, an image guide imaging section is used in place of the ITV camera, and the three-dimensional coordinates of the image guide imaging section within the vacuum container are determined. The position can be changed arbitrarily. That is,
Assuming an X-Y-2 rectangular coordinate with two axes in the axial direction of the tubular structure connected to the vacuum container, from this arm body to the lower end of the arm body that can move up and down in the Z-axis direction. The tip of the arm can be protruded and the angle between the two axes can be freely adjusted.The tip of the arm can be rotated around two axes. A movable block that can move freely was mounted on the frame, and an image guide imaging section was attached to this movable block.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram showing an embodiment of the present invention, in which (1) is a drive unit, (2j is a tubular structure, (3) is a gate valve, (41 is a vacuum container, and (4a) is a This is a port connected to the vacuum container. By opening and closing the gate valve (31), the air inside the vacuum container (41 and the tubular structure +21) is ventilated or cut off. (5a) is the arm main body part, (5b) is the port The arm tip part, 16) is the arm rotation part, (
7) is the observation section %+81 is the image guide, (9) is the vacuum pump unit, (11 is the operation panel, Uυ is the optical connector,
(2) is a television camera, and u9 is a monitor receiver.

Next, Figure 2 is an explanatory diagram showing the principle of the image guide (81), (14 is the image guide image receiving part, (g) is the image, α
Q is a subject, (171 is an image guide imaging section, and the imaging section (L7) constitutes a part of the observation section (7) in FIG. 1.

The image guide (8) is composed of, for example, tens of thousands of ultra-fine silica-based optical fibers arranged in an array, one end of which constitutes an image guide imaging section (lη), and the other end constitutes an image guide image receiving section a4. Image guide imaging unit (171
The light incident on the end of each optical fiber in the image guide 1
81, the image is received by the television camera (2) via the optical connector UV, and the image is received by the monitor receiver (131).
will be displayed.

FIG. 3 is a detailed explanatory diagram of the vicinity of the arm tip (5b) in FIG. 1, where the same reference numerals as in FIGS. block,(
19 is the cam follower, ■ is the image guide support ring,
(2 is a light guide irradiation part, (22) is a light guide, and (171, t181, (21) constitutes an observation part (71). In the embodiment shown in FIG. It is transmitted through the light guide (22) with the same specifications as the image guide (8;
Although the example in which the inside of the vacuum vessel (41 is illuminated from υ is shown), the inside of the vacuum vessel (41) may be illuminated by other methods. 2υ is omitted.

The drive unit (11 connects the arm main body (5a) to the tubular structure (2)
) and the port (4a) in two axes, changing the angle that the arm tip (5b) makes with respect to the two axes, and moving the arm tip (5b) along the two axes via the arm rotation part (6). rotates around the drive wire (5) through the cam follower 3
c) by winding up the movable block (the observation unit (7) attached to the arm) along the axis of the arm tip (5b). When the position of the movable block U changes, the image guide 18+ and the light guide An image guide support ring (2) is provided so that (22) can be easily expanded and contracted.

The tubular structure (2) is connected to the port 1- (4a), and the drive unit (1) is controlled from the operation panel l■, and the arm body (
The observation unit (7
1 can be placed at a desired position to perform observation.

In addition, although the embodiment applied to a nuclear fusion reactor has been described above, the apparatus of the present invention can also be applied to a light water reactor, a fast breeder reactor, etc.

〔Effect of the invention〕

As described above, according to the present invention, an image guide is used in place of the conventional ITV camera, and the arm drive system is configured so that the imaging section can be placed at any position within the vacuum container. An inspection device that is significantly superior in terms of observation range and ease of maintenance can be obtained.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention, FIG. 2 is an explanatory diagram showing the principle of the image guide, and FIG. 3 is a detailed explanatory diagram of the vicinity of the tip of the arm in FIG. 1. (1)... Drive unit, (21... Tubular structure, (3)
...Gate valve, (41...Vacuum container, (5a)
...Arm main body part, (5b)...Arm tip part;
6)...Arm rotation part, (7)...Observation part, (8)
...Image kite, (9)...Vacuum pump unit, Scream...Operation panel, uD...Optical connector, (]O...
...television camera, [31...monitor receiver,
(171... Image guide imaging unit, (1F... Movable block, 17! IJ... Image guide support ring. The same reference numerals in each figure indicate the same or equivalent parts. Agent Ten! - Wind −

Claims (1)

[Scope of Claims] A tubular structure connected to a port portion of a vacuum container, in which gas flow between the vacuum container and the vacuum container is blocked or opened by a gate valve, and this tubular structure is connected to the vacuum container. A vacuum pump unit for evacuating the inside of a vacuum container that is kept airtight from the outside air in a state of , a rod-shaped arm main body that can move up and down in two axial directions inside the tubular structure; a rod-shaped arm that extends from the lower end of the arm main body and can change the angle that its extension direction makes with the Z-axis; an arm tip, an arm rotation part for rotating the arm tip around the Z axis, and a movable arm that is mounted on the arm tip and can move along the length of the arm tip. a block, an image guide imaging unit mounted on the movable block and constituted by a light beam input end of the image guide, and provided to transmit the light beam input to the image guide imaging unit to a predetermined location of the tubular structure. An image guide, holding multiple points along the arm tip of this image guide. a plurality of image guide support rings that slide on the arm tip as the movable block moves along the length of the arm tip; and vertical movement of the arm main body in the Z-axis direction; The tip of the arm above is Z
A movement that changes the angle formed with the axis, an interlocking movement that rotates the arm tip part around the Z axis via the arm rotation part, and a movement that moves the movable block along the length direction of the arm tip part. An apparatus for inspecting inside a vacuum container, comprising: a drive unit for driving a moving movement; and an optical connector optically coupled to the image guide at the predetermined location of the tubular structure.