JPS60168076A - 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 Yuzu vacuum container is coated with titanium, and in conventional inner wall maintenance work, high voltage and large current are applied to titanium balls held in a predetermined position inside the vacuum container to melt and diffuse the coating. 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 true atmosphere inside the vacuum vessel, the outside of the shaft-shaped structure is surrounded by a tubular guide, and this tubular guide kite is connected to a predetermined part of the vacuum vessel to connect the inside of the vacuum vessel and the tubular guide. In a vacuum atmosphere, the shaft-shaped structure is lowered into the tubular guide by driving it up and down (a) using the drive mechanism installed at the top of the tubular guide. When applying titanium coating, the shaft is The titanium ball attached to the tip of the shaft-shaped structure was lowered to the above-mentioned predetermined position in the vacuum container, and after the titanium coating was completed, the shaft-shaped structure and the titanium ball were again housed in the tubular guide. A high voltage conductor assembly is connected to the titanium ball to communicate with it.
The outside of the wire assembly is coated with an inorganic insulation.

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 apply a localized titanium coating. Furthermore, there was no means for observing the condition inside the vacuum container. Therefore, the amount of titanium poles that are more than necessary is consumed9, and the work time required for coating is long, and it is necessary to replace the titanium balls many times, which is problematic in terms of economic efficiency. There was a drawback that it was not possible to grasp the situation after coating.

[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 the Z axis being the axial direction of the tubular structure connected to the vacuum container. It can move up and down in the Z-axis direction, protrudes in a direction perpendicular to the Z-axis, and moves along the X-axis with the Z-axis as the center.
An arm tip that is rotatable in the Y plane is provided, a movable block that can move freely in the length direction is mounted on the arm tip, and a titanium evaporation source is attached 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 the image guide imaging unit attached to the tip of the arm. This made it possible to observe the situation.

Furthermore, the titanium evaporation source is provided with a high-voltage conductor assembly for ``RLm'' and a winding mechanism capable of winding up the slack of the image guide from the image guide imaging section, and the high-voltage conductor assembly and the image guide are - A relay support part capable of fixing the position IM within the Y plane was provided to facilitate the operation of each drive system when moving the position of the titanium vapor deposition source.

[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 one embodiment of the present invention, in which (1) is a drive unit, (2) is a tubular structure, (3) is a gate valve, (4) is a vacuum container, and (5) is a ; is a vacuum container (
41. By opening and closing the gate valve (3), the vacuum container (4) and port 5) and the internal atmosphere of the tubular structure (2) are ventilated or cut off. (6
) is the arm body, (7) is the arm rotation part, (81 is the arm tip, (8a) is the drive wire, (8 is the relay support part, (9) is the titanium evaporation source, and (curved) is the high voltage conductor assembly. , till is a high-voltage conductor support ring, 02 is an image guide imaging unit, (12a) is an image guide, (l:1 is a vacuum pump unit, α→ is an operation panel, Qυ is a winding mechanism box,
4 is a winding drum, care) is an optical connector, (181 is a television camera, and Kasumi is a monitor receiver).

Next, FIG. 2 is an explanatory diagram showing the principle of the image guide (12a), where 0 is the image guide imaging section as with the same reference numerals in FIG. 1, 0 is the image receiving section, (2 is 1 image floor, ( 22) is the subject. Also, Figure 3 shows the tip of the arm in Figure 1 (
81, the same reference numerals as in FIG. 1 indicate the same parts, (23) is a movable block, (24) 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 quartz thread optical fibers arranged in an array, one end of which constitutes the image guide imaging section α, and each optical fiber of the image guide imaging section (2). The light incident on the end is transmitted by the image guide (12a), is received by the television camera (boat) via the optical connector (Iη), and is displayed on the monitor television receiver (I9).

The drive part (1) connects the arm body part (6) to the tubular structure (2).
and a state in which the axis of the arm tip (81) coincides with two axes (not shown) and a state in which the axis lies within the X-Y plane (the The arm rotating part (5) changes the angle between the low and low states shown in Figure 1.
The arm tip of the titanium evaporation source (9) is attached to the movable block (23) by rotating the arm tip +S+ around the Z axis through the cam follower (24) and winding the drive wire (8a) through the cam follower (24). 18) Change the position within. If the position of the moving block (23) changes, contact the surface pressure conductor assembly! In order for the J1101 to maintain its insulation and be able to expand and contract easily, the pressure conductor is supported by
υ is provided.

Connect the tubular structure (2) to the boat +51, control the operating panel α to control the movable block (23) to a predetermined position, and move the vacuum pump unit l-(1: 31 to create a vacuum atmosphere inside the vacuum container +41, a current is applied to the titanium vapor deposition source (9) to melt it.
Spread it. In addition, the entire area inside the vacuum vessel (41) can be monitored by the image guide imaging unit (2) fixed to the arm tip (8).The light guide (25) uses an optical fiber like the image guide (12a). The light from the light source is transmitted to illuminate the inside of the vacuum container (41).

The subject (22) entered the vacuum container (41) in the image guide imaging section a → the image guide (12a)
and when it reaches the image guide receiver (20),
Here, it is converted into an electrical signal by a television camera (18) 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 in FIG. 1. In the figure, the same symbols as in FIG. 1 indicate the same parts.
6) is the drum shaft of the winding drum (16), (27) is the bearing of the drum shaft (26), (28) is the shaft seal, and (29).

(30) is a reduction gear, (31) is a motor for driving the drive shaft (26), and (32) is an electric wire penetration portion. The inside of the winding mechanism box (to) is a shaft seal (28) and a wire penetration part (32).
The connecting mechanism of the optical connector (I7) maintains airtightness with the outside air, and connects the tubular structure (2) so that the chamber conductor assembly surface and the image guide (12a) can pass through. .

When the arm body (61) moves in the Z-axis direction by the drive unit (1), the arm tip (61) moves from the arm body (6) to the arm tip (
High voltage conductor assembly IJ t provided along 81
Since slack or tension is applied to lUl and the image guide Oa, the drum shaft (26) is rotated according to the up and down of the arm body +61 to prevent slack and to avoid applying undue tension. The drum (IQ) is used for winding or unwinding. By providing such a winding mechanism, the drive characteristics of the arm drive system are improved, and the high voltage conductor assembly (+(I) and image guide (12a)
) deterioration can be prevented.

FIG. 5 is a partially cutaway elevational view of the relay support part (8b) of FIG. 1. In the figure, the same symbols as in Figure 1 indicate the same parts, (33) is a guide roller, (34) is a spring, (35)
is the fixing metal fitting, (36) is the fulcrum of the fixing metal fitting (35),
(37) is a relay support part drive wire. Relay support part (
8b) has a cylindrical structure, and a guide roller (33) provided on its outer circumferential surface is constantly in contact with the port 5) inwardly by a spring (34), and the relay support drive wire (37)
It is driven in two axial directions from the drive unit tl+ via the drive unit tl+. In the axial direction (that is, the Z-axis direction) of the relay support part (8b), through holes are provided through which the arm body part (6), the high voltage conductor assembly 110), and the image guide (12a) can slide. There is. In addition, the high voltage conductor assembly and image guide (12a) are taken up on the drum u0.
When winding with
In order to fix the position of the high voltage conductor assembly (IO) and the image guide in the X-Y plane circle, the fixing bracket (35) is operated by the drive wire (8a), and the relay support is placed at the desired position in the port (5). (8b) is fixed. X-Y of high voltage isoline assembly curve) and image guide (12a)
The fixed position in the plane over the axial length of the intermediate support (8b) greatly facilitates winding on the winding drum (IQ).

In addition, although the case where this invention is applied to a nuclear fusion reactor was explained above, the apparatus of this invention can also be applied to a light water reactor, a fast breeder, 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 predetermined range within the vacuum container, and is also provided with a function for observing the inside of the container. It is possible to increase the efficiency of maintenance work on the inner wall of the vacuum container and improve technical reliability. Further, since the winding mechanism and the relay support section are provided, it becomes easy to arrange and wind up the high voltage conductor assembly and the image guide.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing an embodiment of the present invention, Fig. 2 is an explanatory diagram showing the principle of the image guide in Fig. 1, and Fig. 3 is an explanatory diagram showing details of the vicinity of the arm tip in Fig. 1. Figure 4 is an explanatory diagram showing the internal configuration of the winding mechanism box in Figure 1.
FIG. 5 is a partially cutaway elevational view of the relay support section of FIG. 1. (1)... Drive unit, 12)... Tubular structure, (3)
...gate valve, (4) ...vacuum container, (5).
...Port, (6)...Arm body, (71...
Arm rotation part, (8)... Arm tip part, (8b).
・Relay support part, (9) ・Titanium deposition source, 10)・
・・High voltage conductor assembly, ke υ ・High voltage conductor support ring, (6) ・・Image guide imaging section, (12a)・
...Image guide, (131... Vacuum pump unit, αυ... Winding mechanism box, (23)... Movable block. In addition, the same reference numerals in each figure indicate the same or equivalent parts. Agent Masuo Oiwa Figure 1 Figure 2 Figure 4

Claims (1)

[Claims] A tubular structure connected to the boat part of a vacuum vessel, and gas flow between the vacuum vessel and the vacuum vessel is blocked or opened by a gate valve; when this tubular structure is connected to the vacuum vessel, outside air is Assuming an X-Y-Z rectangular coordinate with two axes as the axes of the tubular structure, A rod-shaped arm main body that can move up and down in two axial directions inside the structure, and is extended from the lower end of the arm main body so that the direction of extension can be changed with respect to the axial direction of the arm main body. a rod-shaped arm tip; an arm rotating part for rotating the arm tip around the Z-axis; 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, and the high-voltage conductor assembly. a plurality of high voltage conductor support rings that hold a plurality of parts 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 main body in the Z-axis direction, change of the angle between the length direction of the arm tip and the length of the upper arm main body, and A drive unit that drives rotational movement of the arm tip of the arm around the Z-axis and movement of the movable block along the length direction of the arm tip, and a drive unit that drives a light beam from the inner wall of the vacuum container an image guide imaging unit attached to the tip of the arm so that the light beam enters the image guide imaging unit; an image guide provided to transmit the light beam incident on the image guide imaging unit to a predetermined location; and an image guide installed in the Z-axis direction 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, and the winding is connected to the tubular structure and has a structure that maintains airtightness from outside air. a take-up mechanism box; a connector provided in the take-up mechanism box and optically coupled to the image guide; an electric wire penetration part provided in the take-up mechanism box through which the high-voltage conductor assembly passes; It is configured to be able to move and stop at any position in the Z-axis direction, and has through holes in the axial direction through which the arm main body, the commercial conductor assembly, and the image guide can slide freely. A vacuum vessel inner wall maintenance device comprising: a relay support section; and means for driving the movement of the relay support section and the positional movement of a fixing fitting for preventing the movement from the drive section.