JPS60166888A - Vacuum vessel inner-wall maintaining device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a device for performing maintenance work on the inner wall of a vacuum vessel, such as a vacuum vessel of a nuclear fusion reactor.

[Prior art]

The inner wall of this type of vacuum container is coated with titanium, and conventional inner wall maintenance work involves melting and diffusing the titanium ball by applying high voltage and large current to the titanium ball held in a predetermined position inside the vacuum container. , the damaged part of the titanium coating was repaired. The titanium ball is attached to the tip of the shaft-like structure. In order to maintain a vacuum atmosphere inside the vacuum container, the outside of the shaft-shaped structure is surrounded by a tubular guide, and this tubular guide is connected to a predetermined part of the vacuum container to create a vacuum inside the vacuum container and the tubular guide. In the atmosphere, the shaft-shaped structure is moved into the tubular guide by the drive mechanism provided at the upper part of the tubular guide.
, j) When performing titanium coating by vertically driving the shaft-shaped structure, the titanium ball attached to the tip of the shaft-shaped structure is lowered to the above-mentioned predetermined position in the vacuum container, and after the titanium coating is completed, the shaft-shaped structure is The structure and the titanium ball were again housed within the tubular guide. A high-voltage conductor assembly is connected to the titanium ball to supply electricity to it, but the outside of the high-voltage conductor assembly is coated with an inorganic insulator to electrically insulate the high-voltage conductor assembly from the shaft-like structure. .

The conventional device is configured as described above, and the titanium balls can be melted and diffused only at one predetermined location within the vacuum container, and only the portion of the vacuum container where the coating needs to be repaired is selected. It was not possible to perform a localized titanium coating. Furthermore, it did not have a means for observing the state inside the vacuum container. Therefore, more titanium balls than necessary are consumed, the working time for coating is long, and the titanium balls have to be replaced many times, which poses problems in terms of economic efficiency. The disadvantage was that it was not possible to grasp the current situation.

[Summary of the invention]

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and this invention assumes an X-Y-Z rectangular coordinate axis with two axes in the axial direction of the tubular structure connected to the vacuum container. It is capable of moving up and down in the Z-axis direction, protrudes in the direction perpendicular to the Z-axis, and moves X-Y around the Z-axis.
By providing an arm tip that can rotate within a plane, mounting a movable block on the arm tip that can freely move in the direction of its length, and attaching a titanium evaporation source to this movable block. The titanium evaporation source can be melted and diffused at any coordinate position on the X-Y-Z coordinate axes within a predetermined range within the vacuum vessel, and the interior of the vacuum vessel can be detected using an image guide imaging unit attached to the tip of the arm. In addition, it is equipped with a high-voltage conductor assembly for supplying current to the titanium deposition source and a winding mechanism that can wind up the slack of the image guide from the image guide imaging section. be.

[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, (2) is a tubular structure, (31 is a gate valve, (41 is a vacuum container, and (5) is a Vacuum container (
4: This is a boat that forms part of. Gate valve +3
1, the internal atmosphere of the vacuum container (41, port (51, and tubular structure +21) is vented or cooled. (6) is the arm main body, and (7) is the arm rotation filter.
l, I81 is the arm tip, (8aB drive wire, (9
) is the titanium vapor source, a■ is the high-voltage conductor assembly, lυ is the high-voltage conductor support ring, αa is the image guide imaging unit, (
12a) is an image guide, 1131 is a vacuum pump unit, CI4 is an operation panel, ``UQ'' is a winding mechanism box, uQ is a winding drum, ``N'' is an optical connector, ti81 is a television camera, and 网 is a monitor receiver. .

Next, FIG. 2 is an explanatory diagram showing the principle of the image guide (12a), in which (2), like the same reference numerals in FIG. 1, is an image guide imaging section, CI! ■ is the image receiving part, (2υ is the image, (22)
is the subject. Moreover, FIG. 3 is a detailed explanatory diagram of the vicinity of the arm tip part; 81 in FIG. 1, where the same reference numerals as in FIG.
is a cam follower, and (25) is a light guide.

The image guide (12a) is composed of, for example, tens of thousands of ultra-fine silica-based optical fibers arranged in an array, one end of which constitutes the image guide imaging section (6), and the end of each optical fiber of the image guide imaging section u. The incident light is transmitted by the image guide (12a) and is received by the television camera through the optical connector 7) and displayed on the monitor television receiver.

The drive part il+ connects the arm body part 16) to the tubular structure (2)
and a boat (5I, driven in the vertical direction, and a state in which the axis of the arm tip (81) is aligned with the two axes (not shown), and the axis is in the X-Y plane ( The angle is converted between the state shown in Figure 1] and the arm rotating part (
The arm of the titanium evaporation source (9) is attached to the movable block (33) by rotating the arm tip mta+ around two axes through the cam follower (5) and winding the drive wire (8a) through the cam follower (24). Tip; changes position within 81. The high voltage conductor assembly (1) is designed so that the high voltage conductor assembly uO can easily expand and contract while maintaining its insulation when the position of the uJ moving block (23) changes.
A high-voltage conductor support ring U is provided along the arm tip (8) of 01 to support the conductor at a plurality of locations.

Connect the tubular structure (21) to the boat (5;
The movable block (23) is set at a predetermined position by controlling the drive unit (1) from A current is applied to the evaporation source (91) to melt and diffuse it. Also, the entire area inside the p-vacuum container (4) can be monitored by the image guide imaging unit (b) fixed to the arm tip: 8. Light Like the image guide (12a), the guide (25) uses an optical fiber to transmit light from a light source to illuminate the inside of the vacuum container (4).

The situation inside the vacuum container (41), which entered the image guide imaging unit α as the subject (22), is based on the image guide (12a).
) and reaches the image guide receiver (20), where it is transmitted by the television camera [81 '! The signal is converted into a multiplied signal and displayed as an image on a monitor receiver (19).

As described above, it is possible to locally repair the titanium coating and observe the situation inside the vacuum vessel before and after the repair.

FIG. 4 is an explanatory diagram showing the internal structure of the winding mechanism box shown in FIG. 1. In the figure, the same reference numerals as in FIG.
2G) is the drum shaft when the winding drum is α, (27) is the bearing of the drum shaft (26), (28) is the shaft seal, and (29).

(30) is a reduction gear, (3 is a motor for interlocking with the drum shaft (26), and (32) is a wire penetration part. Inside the winding mechanism box α9 is a shaft seal (28), a wire penetration part (32). ) and the optical connector (17) to maintain airtightness from the outside air, and to connect the tubular structure +21 so that the high voltage conductor assembly 1101 and the image guide (12a) can pass therethrough.

When the arm body (61) moves in two axes by the drive unit (11K), the arm body (61) moves from the arm tip (
8) along the high voltage conductor assembly [10
Rotate the drum shaft (26) as the arm main body (6) moves up and down without causing slack or applying tension to image guide α2 and image guide α2. Then, winding or rewinding onto the winding drum DI is performed. By providing such a winding mechanism, the drive characteristics of the arm drive system can be improved and deterioration of the heavy pressure conductor assembly LIOI and the image guide (12a) can be prevented.

In addition, although the case where this invention is applied to a nuclear fusion reactor was described above, the apparatus of this 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, the titanium evaporation source is configured so that it can be melted and diffused at any position within a certain range within a vacuum container, and is also provided with a function for observing the inside of the container. Therefore, it is possible to increase the efficiency of maintenance work on the inner wall of the vacuum container and improve technical reliability. In addition, a winding mechanism for winding the high-voltage conductor assembly and image guide is provided, making it easy to arrange these wires. FIG. 4 is an explanatory diagram showing the details of the vicinity of the arm tip in FIG. 1, and FIG. 4 is an explanatory diagram showing the internal configuration of the winding mechanism box in FIG. 1.

(1)... Drive unit, (21... Tubular structure, (3)
...Gate valve, (41...Vacuum container, (51.
...Boat, 16)...Arm body, l'? +...
・Arm rotation part, (81...arm tip part, (9)・
...Titanium evaporation source, thrust...High pressure 4 brick assembly, old 1
...High-voltage conductor support ring, Q...Image guide imaging section, (12a)...Image guide, (I31.
・・Vacuum pump unit, 0→・・Take-up mechanism box, αQ・
... Winding drum, 117) ... Optical connector, (23)
...Movable block.

Note that the same reference numerals in each figure indicate the same or corresponding parts.

Figure 1 Figure 2 Figure 4

Claims (1)

[Claims] A tubular structure connected to the boat part of the vacuum vessel, and in which gas flow between the vacuum vessel and the vacuum vessel is blocked or opened by a gate valve; A vacuum pump unit for evacuating the inside of a vacuum container with an airtight space between A rod-shaped arm body that can move up and down inside an object in the Z-axis direction; a rod-shaped arm body that is extended from the lower end of the arm body and whose extension direction can be changed with respect to the axial direction of the arm body; an arm tip portion for rotating the arm tip portion around the Z axis; an arm rotation portion mounted on the arm tip portion and movable along the length direction of the arm tip portion; a movable block, a titanium deposition source mounted on the movable block, a high-voltage conductor assembly disposed through the tubular structure to the titanium deposition source for supplying current to the titanium deposition source; a plurality of high voltage conductor support rings that hold a plurality of sections along the arm tip and slide over the arm tip as the movable block moves along the length of the arm tip; vertical movement of the arm body in two axial directions, change of the angle between the length direction of the arm tip and the length direction of the arm body, and movement of the arm via the arm rotation unit. A drive unit that drives the rotational movement of the tip part around two axes and the movement of the movable block along the length direction of the arm tip part, and a driving part that drives the movement of the movable block along the length direction of the arm tip part, such that light rays from the inner wall of the vacuum container are incident thereon. An image guide photographing section layered at the tip of the arm, an image guide provided to transmit the light beam incident on the image guide to a predetermined location, and an upper part of the arm main body.
A winding mechanism is provided for winding up or unwinding the high-voltage conductor assembly and the image guide as they move in the dZ-axis direction, and is connected to the tubular structure to maintain airtightness from the outside air. A winding mechanism box having a structure,
A vacuum vessel inner wall maintenance device comprising: an optical connector provided on the winding mechanism box and optically coupled to the image guide; and an electric wire penetration portion provided on the winding mechanism box and penetrating the high voltage conductor assembly.