JPH07959Y2 - Wall profile decontamination equipment in nuclear reactor equipment - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a wall surface decontamination machine for reactor wells, D / S pools, cavities, etc. of reactor equipment.

(Prior Art) There are various decontamination machines equipped with a pressing mechanism, a holding mechanism, a moving mechanism and the like of a blasting and cleaning device required for decontaminating a wall surface, and they are put into practical use.

FIG. 2 shows an example of a conventional decontamination machine. Reference numeral 1 denotes a machine body, and a traveling motor 2 installed on the machine body 1 drives traveling wheels 3 via endless belts to travel on a wall surface (not shown). Reference numeral 4 denotes a suction plate, which is sucked by a vacuum pump (not shown), sucked on the wall surface to be decontaminated, and holds the machine body.

A roll brush 5 decontaminates the wall surface. The roll brush 5 is driven by a brush motor 6 installed on the machine body 1 through a timing pulley 7, a timing belt 8 and a timing pulley 9. Reference numeral 10 is a brush fixing arm, and the cut amount of the roll brush 5 is adjusted by adjusting the brush cut adjustment bolt 11. 12 is a brush cover,
It is fixed to the brush fixing arm.

As can be seen in the above-mentioned known example, once the cut amount of the roll brush is determined by the brush cut adjustment bolt 11, the cut amount relatively changes when the wall surface shape of the decontamination machine changes, Decontamination unevenness could occur. Also, with respect to the brush cover 12 that covers the roll brush 5, since the distance between the seal member and the brush is fixed, the sealing effect is lost and the other wall surfaces are re-polluted due to an arbitrary change in the cutting depth and the shape change of the wall surface. There was a possibility.

(Problems to be solved by the invention) Give sufficient functions for pressing, holding, and moving for decontamination necessary for decontamination of the wall surface, and always give the same incision according to the change of the wall shape, Prevents uneven decontamination due to changes in the depth of cut to improve decontamination efficiency, and changes the brush cover's seal part according to changes in the wall shape to constantly crimp it to the wall surface, providing a sealing function. The purpose of the present invention is to provide a wall surface decontamination machine capable of preventing the diffusion of contaminated water used for.

(Means for Solving the Problems by the Invention) In a decontamination machine having a vacuum suction board at the lower center of the main body frame and traveling wheels, roll brushes covered with brush covers are provided at the front and rear of the main body frame. A brush that is rotatably attached to the lower end of a movable arm that is pivotally attached to the frame, and is swingably supported by an air cylinder that is attached between the upper end of the movable arm and the body frame, and is attached to the upper end of the movable arm. It was made to drive via a belt by the electric motor for use.

Then, a wheel for determining a brush cut is attached to the lower portion of the brush cover so that even if there is unevenness on the wall surface, decontamination can be performed with a constant cut amount in accordance with this change.

(Example) It demonstrates based on FIG. 21 is a body frame. The body frame 21 is a suction cup 22 installed in the center of the body frame
It is adsorbed and held on the wall surface. Reference numeral 23 is a traveling wheel attached to the lower portion of the main body frame, and is driven by a traveling electric motor 24 installed on the upper portion of the main body frame 21 via a sprocket wheel 26 of a roller chain 25.

Reference numeral 27 is a movable arm which is pivotally supported on the body frame 21 via a fulcrum pin 27a and has an inverted V shape. A roll brush 28 is rotatably supported below the tip of the movable arm 27. Reference numeral 29 is a brush cover, and a flexible material, for example, a urethane plate 29a, which is in contact with the wall surface 36 is provided at the lower end.

The roll brush 28 is driven via a timing pulley 31, a timing belt 32, and a timing pulley 33 by a brush electric motor 30 installed on the other end of the movable arm 27.

Reference numeral 34 is an air cylinder attached between the upper end of the main body frame 21 and the upper end of the movable arm 27. The expansion and contraction of the air cylinder causes the movable arm 27 to rotate around the fulcrum pin 27a, so that the roll brush 28 is automatically copied.

Denoted at 35 is a wheel for determining the depth of cut, which is attached to the lower portion of the brush cover 29 and is in contact with the wall surface 36 to be decontaminated. By the wheel 35 and the air cylinder 34, automatic scanning decontamination is performed with a constant cutting amount.

As shown in FIG. 1, the above-mentioned configuration is provided in front of and behind the body frame 21 in pairs.

(Operation) The vacuum suction board 22 is suction-held on the wall surface 36, and receives the pulling force of the traveling wheels 23 and the pressing force of the roll brush 28 to the wall surface 36 by the pressing force on the wall surface 36. The wall pressing force of the roll brush 28 is performed by the pressing force of the air pressure by the air cylinder 34, so that the roll brush 28 can always grind the wall surface 36 with the same cutting amount according to the shape of the wall surface 36. Copying and decontamination can be performed regardless of changes in the shape of the wall surface 36.

(Effect) A conventional decontamination machine adsorbs to a wall surface with an adsorption board and travels with wheels. At this time, the brush cut is determined by the brush cut adjustment bolt. However, since the cutting depth is fixed, the position of the wheel and the cutting depth of the brush are absolute, and the cutting depth of the brush changes depending on the unevenness of the wall surface.

In other words, when the machine goes from the valley portion of the uneven wall surface toward the mountain portion, the value becomes the same as the determined value near the summit where the cut is not deep.
In addition, the depth of cut becomes shallower when going from the peak to the valley.

On the other hand, a pair of roll brushes are provided in front of and behind the main body frame, the roll brushes are supported via a movable arm, and an air cylinder is attached to the upper part of the movable arm between the main body frame and the brush notch. Since the determination wheel is provided on the movable arm, it automatically follows changes in the wall shape and enables efficient decontamination with a uniform depth of cut.

[Brief description of drawings]

 FIG. 1 is a front view of a decontamination machine according to the present invention. FIG. 2 is a front view of a conventional decontamination machine. In the figure; 1 ... Airframe, 2 ... Traveling motor 3 ... Traveling wheel, 4 ... Adsorption board 5 ... Roll brush, 6 ... Brush motor 7 ... Timing pulley 8 ... Timing belt 9 ... Timing pulley 10 …… Brush fixing arm 11 …… Brush notch adjusting bolt 12 …… Brush cover 21 …… Main body frame, 22 …… Vacuum suction plate 23 …… Travel wheel, 24 …… Travel motor 25 …… Roller chain 26 …… sprocket wheel 27 …… movable arm, 27a …… fulcrum pin 28 …… roll brush, 29 …… brush cover 30 …… brush motor 31 …… timing pulley 32 …… timing belt 33 …… timing pulley 34… … Air cylinder, 35… Wheel 36… Wall

Claims (2)

[Scope of utility model registration request] 1. A decontamination machine equipped with a vacuum suction disk and traveling wheels at the lower center of a main body frame, comprising a pair of roll brushes covered with brush covers at the front and rear of the main body frame. It is rotatably attached to the lower end of a movable arm pivotally attached to the main body frame, and is swingably supported by an air cylinder attached between the upper end of the movable arm and the main body frame. A wall surface decontamination machine in a nuclear reactor facility, characterized in that it is driven via a belt by an attached brush electric motor. 2. The wall surface decontamination machine in a nuclear reactor facility according to claim 1, wherein a wheel for determining a brush cut is attached to a lower portion of the brush cover.