JPH10253797A - Machine for decontaminating wall surface in reactor facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extract the water from a pool and of the same time decontaminate a wall surface at the same time, enable with a single device the decontamination of not only a vertical wall surface but also a tiered stand and speed up decontamination work by putting a disc brush into contact with the wall surface. SOLUTION: This machine includes decontaminating components 7 for decontaminating a vertical wall surface that is placed on the right and left sides in front of a main body frame 1 which can be suspended by a hoisting accessory and that can be rocked horizontally around a supporting pin 8 by the drive of an air cylinder 13, a suction cup 2 placed between the right and left decontaminating components 7 to stick to the wall surface and running wheels 3 for lateral movement driven by a motor 4 for running the wheel 3. In each of the decontaminating components 7, a pair of upper and lower disc brushes 9 are mounted in a brush cover 11 whose part put in contact with the wall surface is surrounded by a flexible material 12. In the upper part of the main body frame 1, moreover, there are a pair of right and left roll brushes 14 which are covered with roll brush covers 22 and are driven by a roll brush motor. An air cylinder 15 placed between the main body frame and a supporting plate makes it possible to house and adjust pressing power.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wall decontamination machine in a nuclear reactor facility. In particular, the present invention relates to a wall surface decontamination machine that operates according to the shape of a wall surface and moves in a lateral direction.

[0002]

2. Description of the Related Art Conventionally, in a nuclear reactor facility, a wall surface decontamination machine which moves vertically along a wall surface is known. FIG. 5 shows an example. In FIG. 5, a is a main body frame. The main body frame a is suction-held on the wall surface by a suction plate b installed at the center thereof. Reference numeral c denotes a traveling wheel mounted on a lower portion of the main frame a, which is driven by a traveling motor d installed on an upper portion of the main frame a via a sprocket wheel f of a roller chain e. . Reference numeral g denotes a movable arm which is pivotally supported on the body frame a via a fulcrum pin h and has an inverted V shape. A roll brush i is rotatably supported at the lower end of the movable arm g. j is the brush cover,
The lower end is provided with a flexible material, for example, urethane plate 1, which is in contact with wall surface k.

[0003] The roll brush i is driven by a brush motor m disposed above the other end of the movable arm g through a timing pulley n, a timing belt o, and a timing pulley p. q is an air cylinder mounted between the upper end of the main frame a and the movable arm g. The air cylinder expands and contracts to rotate the movable arm g around the fulcrum pin h, thereby forming the roll brush i. Automatic copying is performed.

[0004] Reference numeral r denotes a brush cutting determination wheel attached to the lower portion of the brush cover j for determining the cutting amount, which is in contact with the surface k to be decontaminated. By the wheel r and the air cylinder q, automatic copying decontamination is performed at a constant cutting amount. As shown in FIG. 5, the above configuration is provided in pairs above and below the main frame a.

The vacuum suction disk b is held by suction on the wall surface k, and receives the traction force of the traveling wheels c loaded thereon and the pressing force of the roll brush i against the wall surface k by the pressing force against the wall surface k. B
The pressing force of the wall surface of the brush i is performed by the pressing force of the air pressure by the air cylinder q, whereby the roll brush i can always clean the wall surface k with the same cutting depth in accordance with the shape of the wall surface k. It is possible to perform decontamination by copying regardless of a change in the shape of the wall surface k.

[0006] With such a configuration, since it can be moved only along the vertical wall in terms of mechanism, decontamination cannot be performed simultaneously with drainage of the pool. Further, since there is no brush for decontaminating the step portion in the body frame a, the use is restricted. Because of the roll brush, replacement during operation is impossible, and quality control of the decontamination effect is difficult. The decontamination part is low.
The decontamination speed cannot be increased due to the cleaning by linear contact of the brush. In addition, because the roll brush is weak,
There were problems such as the necessity of a cutting wheel.

[0007]

In order to solve the problems of the prior art, the decontamination machine is made to be of a lateral movement type, so that decontamination can be performed at the same time as the drainage of the pool, thereby shortening the work process, and reducing the number of work steps. To prevent the scattering of radioactive dust, to provide a brush for decontamination of chicks, to enable decontamination of chicks (stepped part) together with the vertical wall with one unit, and to wash on the cylindrical end face It is an object of the present invention to provide a decontamination machine that employs a disk brush so that the decontamination speed can be increased as a surface contact, and that can easily replace a brush.

[0008]

Means for Solving the Problems A main frame 1 which can be hung by a hanger and provided on the front left and right sides of the main frame 1 and are laterally driven by an air cylinder 13 around support pins 8. A swingable vertical wall decontamination section 7 for decontamination, an adsorber 2 for adsorbing the wall provided between the left and right decontamination sections 7, a left and right decontamination section 7 and an adsorber 2 at the center. And a traveling wheel 3 for lateral movement driven by a traveling motor 4. A pair of upper and lower disc brushes 9 is provided on the decontamination section 7 by a flexible material 12 to contact the wall with the wall. It is mounted in the enclosed brush cover 11. The decontamination section 7 was swung by the operation of the air cylinder 13 so that one apparatus could cope with a curved wall and a plane wall. In addition, a pair of left and right roll brushes 14 for decontamination of chicks, which are covered with a roll brush cover 22 and are driven by a roll brush electric motor 17, are provided above the main frame 1.
Is supported on a supporting plate 21 on the upper part of the main frame 1, and the storage and pressing force can be adjusted by an air cylinder 15 provided between the main frame 1 and the supporting plate 21.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. In FIG.
1 is a main body frame. The main body frame 1 is adsorbed and held on a vertical wall surface by an adsorber 2 installed at the center of the front. Reference numerals 3 denote traveling wheels mounted on the left and right of the main frame 1, and are driven by a traveling motor 4 installed in the main frame 1 via a roller chain 5 and a sprocket 6. The decontamination section 7 is pivotally supported on the main body frame 1 via support pins 8. The decontamination section 7 is mounted on the left and right sides of the main body frame 1 in pairs, and above and below the disk type brush 9 is directly connected to the brush motor 10 and is rotatably supported. 11 is a brush cover material having flexibility;
For example, neoprene sponge rubber 12 is provided. The flexible material 12 contacts the wall surface and partitions the decontamination section 7 in a watertight manner.

Reference numeral 13 denotes an air cylinder mounted between the main frame 1 and the decontamination section 7. Due to the expansion and contraction, the decontamination unit 7 is rotated around the support pin 8 to perform the automatic copying of the disk type brush 9. The pressing force against the wall surface of the air cylinder 13 can be easily performed by adjusting the air pressure.
By utilizing the strength of the waist of the disc-type brush 9, a constant cutting amount can be given to perform automatic copying decontamination without a wheel for determining the brush cutting amount. The above mechanisms are provided in pairs on the left and right sides of the main body frame 1.

Reference numeral 14 denotes a roll brush which is used for decontamination of the wall surface as shown in FIG. 2, for example, the upper surface of the reactor well stage A, and which is always stored and taken out when necessary by expansion and contraction of the air cylinder 15. Air cylinder 1
5 is extended and pressed against the wall B, and the cutting amount is determined by the cutting wheel 16 (FIG. 2) at the tip. As a result, automatic copying decontamination can be performed at a constant cutting amount. The roll brush 14 is a cantilever support. In addition, the electric motor 1 for the roll brush
7, the shaft is driven by a roller chain 18 and a sprocket 19, and the shaft is held by a bearing device 20. The above mechanism is mounted on the support plate 21. An air cylinder 15 is mounted between the main body frame 1 and the support plate 21, and when the air cylinder 15 is extended, the support plate 21 is pushed forward. 22 is a roll brush cover (FIG. 1), 23 is a control panel, and 24 is a sprinkler.

(Operation) The operation of the decontamination machine of the present invention will be described with reference to FIGS. FIG. 3 shows the decontamination state of the flat wall 25. In this case, since the decontamination wall is the flat wall 25, the pair of left and right decontamination sections 7 are positioned parallel to each other, and the decontamination surface of the disk-type brush 9 and the traveling wheel 3 are all arranged flush. Have been.

FIG. 4 is different from FIG. 3 in that the surface to be decontaminated is a curved wall 2.
It is 6. Because of the curved wall, the disk type brush 9 does not fit the wall surface until the state shown in FIG. Therefore, in this case, the disc type brush 9 is slightly opened outward around the support pin 8 by operating the air cylinder 13.

[0014]

A pair of upper and lower disc-type brushes 9 mounted on a decontamination section 7 for decontamination of a vertical wall are attached to the main body frame 1 by support pins 8 so as to be able to swing sideways. The air cylinder 13 was operated so that it could swing right and left. Further, since the decontamination section 7 is provided in front of the main body frame 1 and can be moved laterally by the traveling wheels 3, decontamination can be performed simultaneously with draining of the pool. Therefore, the working process can be shortened and scattering of radioactive dust from the wall surface can be prevented as compared with the conventional vertical movement type.

Since the swing can be performed by operating the air cylinder 13, a single device can handle both a curved wall and a flat wall. Further, since the roll brush 14 for decontamination of the tier is provided, not only the above-mentioned flat and curved walls but also the upper surface of the tier can be decontaminated. The disc type brush has a surface contact in which the end face contacts the wall surface, so that the decontamination speed can be increased as compared with the roll type brush. Further, since the replacement is easy, it is possible to replace even during the work due to the decontamination effect and the increase in the dose equivalent of the brush.

[Brief description of the drawings]

FIG. 1 is a decontamination machine according to the present invention.

FIG. 2 is a side view of the decontamination machine.

FIG. 3 shows a planar wall decontamination state.

FIG. 4 shows a decontaminated state of a curved wall.

FIG. 5 is a side view of the prior invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Main body frame 2 Suction board 3 Running wheel 4 Running motor 5 Roller chain 6 Sprocket 7 Decontamination section 8 Support pin 9 Disk type brush 10 Brush motor 11 Brush cover 12 Sponge rubber 13 Air cylinder 14 B Brush 15 Air cylinder 16 Wheel for determining the depth of cut 17 Electric motor for roll brush 18 Rollache
19 Sprocket 20 Bearing device 21 Support plate 22 Roll brush cover 23 Control panel 24 Watering device 25 Flat wall 26 Curved wall

Claims (3)

[Claims] 1. A main body frame (1) that can be suspended by a suspender, and provided on the front left and right of the main body frame (1),
A decontamination section (7) for vertical wall decontamination that can swing laterally around the support pin (8) by driving an air cylinder (13);
Adsorber (2) for adsorbing wall surfaces provided between the left and right decontamination sections (7)
And a traveling wheel (3) for lateral movement, which is located between the left and right decontamination sections (7) and the suction cup (2) at the center and is driven by a traveling motor (4). A reactor, characterized in that a pair of upper and lower disk brushes (9) are mounted in a brush cover (11) whose contact portion with a wall is surrounded by a flexible material (12). Wall decontamination machine in equipment. 2. The decontamination unit (7) according to claim 1, wherein the decontamination unit (7) is swung by the operation of the air cylinder (13) so as to be able to cope with a curved wall and a plane wall with one device. Dyeing machine. 3. A roll brush for decontaminating a pair of left and right chicks, which is covered with a roll brush cover (22) on the upper part of the main body frame (1) and driven by a roll brush electric motor (17). (1
4), and these roll brushes (14) are composed of a main body frame (1).
The main frame is supported on the upper support plate (21).
2. A wall decontamination machine according to claim 1, wherein said air cylinder (15) provided between said (1) and said supporting plate (21) allows the adjustment of the housing and the pressing force.