JP2001027693A - Decontaminating/washing device for hood mask - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a constant decontamination effect with mechanics, relieving operators from burdensome manual operations, although irregularity occurred in it because of manual operation, wherein the manual decontamination operation by a heavily equipped operator was required for decontaminating used food masks contaminated with radioactive material for reuse. SOLUTION: This is related to removal of radioactivity sticking to a hood mask used as a respiratory protective equipment within a nuclear power plant as well as decontamination and washing of general contamination. Here, a hood mask rotating device which rotates a mask 1 on the spot when a start button is pressed, a brush 4 which is rotated by a roller motor 6, a brush vertical-movement device which vertically moves the brash 4 along the side surface of the mask 1, and nozzles 8 and 9 which sprinkle washing water from inside and outside of the mask 1, are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a food mask decontamination apparatus.

[0002]

2. Description of the Related Art At the time of a periodic inspection of a nuclear power plant or the like, a lot of operations for handling equipment contaminated with radioactive materials occur. At this time, there is a food mask (FIG. 1B) among the respiratory protective equipment worn by the worker. In the past, full-face masks were often used, but recently a hood-shaped mask is worn over the entire head, and from the battery-powered blower section,
A food mask of a type in which purified air is sent through a built-in filter is often used. This is a so-called air supply type mask.

[0003] In a work place contaminated with radioactive materials, a food mask used once is wiped with a gauze impregnated with ethanol for disinfection by hand, or a detergent is attached to a sponge, and the food mask is washed with running tap water. Methods such as washing have been adopted.

[0004] Since both are manual operations and the outer surface of the food mask itself is contaminated with radioactive materials,
Washing equipment is also heavy equipment such as anorak, and the burden on the worker becomes heavy. Therefore, mechanization of this work has been required.

[0005]

1) To decontaminate and reuse a used food mask contaminated with radioactive materials, a heavy demolition worker had to perform manual decontamination work. 2) To release the operator from such a burdensome manual work and to mechanize it. 2) Conventionally, the decontamination effect was uneven due to manual work, but a certain decontamination effect was obtained by the mechanization. The purpose is to be able to be.

[0006]

Means for Solving the Problems 1) In the removal of radioactivity attached to a food mask used as a respirator in a nuclear power plant and the decontamination / cleaning of general dirt, a start button is pressed. A hood mask rotating device that rotates the mask 1 with the brush, a brush 4 that is rotated by a roller motor 6, and the brush 4 along a side surface of the mask 1.
Brush moving device for moving the mask up and down, and the mask 1
And nozzles 8 and 9 for spraying washing water from inside and outside. 2) The hood mask rotating device is mounted on an upper portion of a rotating shaft 2a, and is provided with a mask mounting jig 2 made of wire mesh manufactured according to the shape of the hood mask 1 and a lower portion of the rotating shaft 2a of the mask mounting jig 2. The brush up / down movement device includes a rodless cylinder 7 that moves the brush 4 up and down in parallel with the hood mask 1 while rotating. 3) Further, the brush fixing unit (5) provided with the groove (11) for mounting the planted base (10) and the roller motor (6) built in the brush fixing unit (5) are integrated by welding. It was made. 4) The brush 4 is implanted on the base 10 and the implanted base 1
0 is inserted into the brush fixing unit 5 provided with the mounting groove 11 while sliding, and both ends are jubilee bands 1.
Fix with 2. 5) A total of eight linear brushes of four different types having different bristle lengths were prepared, and these were alternately arranged on the circumference of the mask fixing unit 5 at 45 ° intervals.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a hood mask worn by an operator to protect against radioactive contamination at a nuclear power plant or the like.
This device decontaminates and cleans the inner and outer surfaces. Hereinafter, details of the apparatus will be described with reference to the drawings.

In FIG. 1, the used food mask 1 is set on a wire mesh mask mounting jig 2 (FIG. 2) manufactured according to the shape of the mask. The mask mounting jig 2 is mounted on an upper part of the rotating shaft 2a and is rotated by a mask rotating motor 3 (FIG. 2) provided on a lower part of the rotating shaft 2a. Inside the decontamination booth, a brush 4 for decontaminating the outer surface of the mask 1
There is. The brushes 4 are set in a brush fixing unit 5 for fixing a total of eight brushes as shown in FIG. The brush 4 is rotated by a roller motor 6. The brush fixing unit 5 is integrated with a roller motor 6 at the center by fitting and welding. The brush fixing unit 5 integrated with the roller motor 6 moves up and down along the side of the mask 1 by the rodless cylinder 7 (FIG. 1). Above the mask mounting jig 2, there is an outer surface watering nozzle 8 for decontaminating the outer surface of the mask 1 during decontamination. At the same time, an inner surface watering nozzle 9 for removing human sweat and oil on the inner surface of the mask 1 is provided inside the mask mounting jig 2.

Since the shape of the hood mask 1 is uneven, the brush tip of a dense brush cannot reach the depth of the uneven surface of the hood mask 1 due to the repulsive force of the brush. For this reason, by arranging eight linear brushes, each of which is one of the channel type brushes, at 45 ° on the circumference of the brush, the distance between the brushes is ensured, and the bristle ends reach the recessed portion of the hood mask 1. It has become. (See Fig. 3)

The brush 4 includes a total of eight brush fixing units 5.
In this set, four brushes 4a have bristle tips about 10 mm longer than the other four brushes 4b.
In FIG. 3, the brush 4a is set to, for example, 70 mm, and the brush 4b is set to, for example, 60 mm. By setting the cut length of the brush to two types, the brush tips can be evenly applied to the uneven surface of the food mask 1.

Next, the brush fixing unit 5 will be described with reference to FIG. Brush fixing unit 5
Are integrated by welding to the roller motor 6. Since the roller motor 6 is integrated, the brush fixing unit 5 is simultaneously rotated when the roller motor 6 is rotated, and the brush 4 attached thereto is also rotated. Brush 4
Hairs are implanted on the base 10 (FIG. 3C). The brush fixing unit 5 is provided with eight grooves 11 in the longitudinal direction. The brush flocking base 10 is slid from the side into the grooves 11. After inserting a total of eight brushes, the brush flocking base 10 is fixed so as not to fall out of the groove 11. As a fixing method, the brush flocking base 10
The non-flocked portions at both left and right ends of the
(A)) and fix it.

(Decontamination method) Next, the decontamination step will be described. 1) Open the door 15 (FIG. 4) of the apparatus, and set the used food mask 1 on the mask mounting unit 2 (FIG. 2). 2) Close the door 15 of the apparatus and press a start button (not shown) in the operation panel 16 (FIG. 4). 3) The mask mounting unit 2 starts rotating. 4) The brush 4 rotates at the same time, and the brush moves up and down by the rodless cylinder 7. At this time, an appropriate amount of water is sprinkled from the inside and outside of the food mask 1 from the nozzles 8 and 9, and the inner and outer surfaces of the food mask 1 are decontaminated and cleaned. 5) The water after the decontamination washing is once accumulated in the drainage tank 13 and then drained out of the apparatus by the drainage pump 14.

[0013]

1) To decontaminate and reuse a used food mask 1 contaminated by radioactive materials,
Although manual decontamination work by a heavy equipment worker was necessary, introduction of this apparatus can relieve the worker from heavy manual work. 2) Conventionally, the decontamination effect was uneven due to manual work. However, a certain decontamination effect has been obtained by mechanization.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a decontamination apparatus.

FIG. 2 is a right side view of FIG.

FIG. 3 is a detailed view of a brush fixing unit.

FIG. 4 is an external view of a decontamination apparatus.

FIG. 5 is a piping diagram of a decontamination apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Hood mask 2 Mask mounting jig 3 Mask rotation motor 4 Brush 5 Brush fixing unit 6 Roller motor 7 Rodless cylinder 8 Outer surface watering nozzle 9 Inner surface watering nozzle 10 Brush flocking base 11 Brush flocking base mounting part 12 Jubilee band 13 Drain tank 14 Drain pump 15 Door 16 Operation panel

Claims (5)

[Claims] 1. In a nuclear power plant, a start button is pressed to remove a radioactive substance adhering to a food mask used as a respirator in a nuclear power plant and to decontaminate and wash general dirt. A hood mask rotating device for rotating, a brush (4) rotated by a roller motor (6), a brush up / down moving device for moving the brush (4) up and down along the side surface of the mask (1), 1) Nozzles (8,
9) A decontamination / cleaning device for a food mask, comprising: 2. The hood mask rotating device according to claim 1, wherein
a, which is attached to the upper portion and is made of a wire mesh made according to the shape of the hood mask (1), and is attached to the lower portion of the rotating shaft (2a) of the mask attaching jig (2). A brushless motor (3), wherein the brush up / down movement device has a rodless cylinder (7) that moves the brush (4) up and down in parallel with the hood mask (1). The food mask decontamination / cleaning apparatus according to claim 1. 3. A brush fixing unit (5) provided with a groove (11) for mounting a planted base (10), and a roller motor (6) built in the brush fixing unit (5).
2. The method according to claim 1, wherein the steps are integrated by welding.
A decontamination / cleaning device for the food mask described in the above. 4. A brush (4) is implanted in a base (10), and the implanted base (10) is inserted while sliding into a brush fixing unit (5) provided with a groove 11 for attachment, and both ends are jubilee bands. The decontamination / cleaning apparatus for a food mask according to claim 3, wherein the apparatus is fixed at (12). 5. A total of eight types of four linear brushes each having a different bristle length of the brush (4) are prepared, and these are arranged on the circumference of the mask fixing unit (5) at intervals of 45 °. 4. The decontamination / cleaning apparatus for a food mask according to claim 3, wherein the apparatus is arranged alternately.