JP3726922B2 - Decontamination and cleaning equipment for protective masks used in nuclear power plants - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a decontamination / cleaning apparatus for removing radioactivity from a protective mask (full-face mask or half-face mask) used as a respirator at a nuclear power plant and cleaning general dirt.
[0002]
[Prior art]
Until now, used masks generated in nuclear power plants have been decontaminated and cleaned by hand.
In addition, although there are cleaning devices for general industries, this type of cleaning device does not have a device that can clean a portion including a rubber material constituting a protective mask and can sufficiently clean a narrow portion of the mask.
[0003]
[Problems to be solved by the invention]
Accordingly, it is an object of the present invention to automate decontamination of a protective mask to reduce work labor, and to provide an apparatus capable of sufficiently cleaning even a narrow portion of a mask containing a rubber material such as a protective mask.
[0004]
[Means for Solving the Problems]
A plurality of mask fixing frames which can be rotated by the drive shaft 8 and support the half-face protective mask a in removing radioactivity adhering to the protective mask used as a respirator in the nuclear power plant and cleaning general dirt. A decontamination / cleaning unit 1 having a cleaning basket 7 provided with 10, 10 'is provided. The decontamination / cleaning unit 1 has a high-pressure spray nozzle 5 and an air nozzle 5 for drying and disinfecting water spray. 'And an exhaust device for preventing leakage of the contaminated atmosphere inside the device to the outside of the device was provided.
A full-face protection mask decontamination / cleaning unit 1 'is provided in which the drive of the high-pressure pump, power and compressed air supply power are sent from the same supply source.
The cleaning basket 7 provided in the decontamination / cleaning section 1 is composed of a mask fixing frame mounting disk 11 fixed to the lower end of the drive shaft 8 and a mask fixing frame 10 equally distributed on the mask fixing frame mounting disk 11. The mask a was put into and taken out of the decontamination / cleaning section 1 by opening and closing the door 2 with the observation window.
A mask fixing frame 10 having a high mask hooking portion and a mask fixing frame 10 'having a low mask hooking portion are alternately arranged on the cleaning basket 7.
On the bottom part of the door 2 with the observation window, a hook receiver 3 that is inclined toward the door mounting side is provided.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
In summary, the present invention uses jet spray cleaning using a high-pressure pump as a cleaning system in decontamination of radioactivity and cleaning of general dirt on a half-mask or full-face mask used in a nuclear power plant. The air blower is used, and after it is dried with the air blower, it is sterilized with a disinfecting sprayer to discharge the contaminated atmosphere in the device.
[0006]
This will be described with reference to the drawings. 1 is a front view of the decontamination apparatus, FIG. 2 is a top view of a pump washing basket, FIG. 3 is a top view of a drive system, and FIG. 4 is a side view. FIG. 5 shows the support state of the protective mask by the support basket in the decontamination apparatus. FIG. 6 is a top view of the protective mask support cage, and FIG. 7 is a side view of the same. FIG. 8 is a detailed view of one supporting car, and FIG. 9 is a detailed view of the saddle receiving relationship in the apparatus.
[0007]
In the figure, reference numeral 1 denotes a decontamination / cleaning unit. The protective mask is decontaminated and cleaned with this, drained after decontamination and cleaning, then disinfected with a disinfecting spray device, air blown and dried. The drying air is exhausted by an exhaust fan. The decontamination / cleaning unit 1 is made of stainless steel, and there is a cleaning basket that supports a number of protective masks inside. In the figure, the decontamination / cleaning section 1 is a half-mask decontamination section, and a full-face mask decontamination / cleaning section 1 'is added adjacent to the decontamination / cleaning section 1 as necessary.
[0008]
On the front surface of the decontamination / cleaning unit 1 made of stainless steel, a large door 2 with a viewing window for inserting and removing the mask a is provided so as to be opened by a hinge. This door 2 has a bowl-shaped bowl receiver 3 that prevents contaminated water droplets adhering to the inside of the door from splashing on the floor or the like when the door is opened (FIG. 9). When the door 2 is opened, the contaminated water droplets adhering to the inner surface of the door 2 are dropped and collected on the slag holder 3 fixed to the lower part. Since this hook receiver 3 is fixed to the door, it can receive the hook that falls reliably regardless of the opening / closing angle of the door 2.
[0009]
The decontamination / cleaning system injects high-pressure water generated by the high-pressure washing water pump 4 from the spray nozzle 5 toward the mask a. In the illustrated example, the cleaning water pump 4 is installed at an intermediate portion between the half-side mask decontamination / cleaning unit and the full-face mask decontamination / cleaning unit (FIG. 2). The pressure is such that the mask a is not damaged and the decontamination / cleaning power is most obtained. The decontamination / cleaning water is stored in the tank 6 and circulated.
On the other hand, a dedicated cleaning basket 7 (FIGS. 4 and 6) for fixing the mask a is rotated by a motor 9 connected via a drive shaft 8 from above. The mask fixing frame 10 of the cleaning basket 7 has a shape that matches the shape of the mask a, so that the mask can be taken in and out with one hand from above. The wearing state of the mask a is shown in FIG.
[0010]
The individual mask fixing frames 10 constituting the cleaning basket 7 will be described with reference to FIG. The cleaning basket 7 is usually composed of 12 mask fixing frames 10. That is, in the case of twelve, one is addressed at 30 °. Every other mask fixing frame 10 has a height. The right side of FIG. 7 is a mask fixing frame 10 having a higher height, and the lower side is a mask fixing frame 10 ′ having a lower height. The mask fixing frame 10 has the shape shown in FIG. 8 and is made of a stainless steel round bar. The mask fixing frame 10 includes an upper horizontal portion 10b continuous to the fixing portion 10a to the mounting disk 11, a vertical support portion 10c following the upper horizontal portion 10b, and a lower horizontal portion bent horizontally from the lower portion of the vertical support portion 10c. It consists of a part 10d, a rising part 10e that spreads upward from the end of the lower horizontal part 10d, and an intermediate horizontal part 10f that connects the upper part of the rising part 10e. The difference between the higher and lower sides of the mask fixing frame 10 is only the difference in the length of the vertical support portion 10c. Now, such a high fixing frame 10 and a low fixing frame 10 ′ are alternately mounted on the periphery of the mounting disk 11, and the intermediate portion of the vertical support portion 10 c is held by the support ring 12.
[0011]
The air blower operated by the air blow switch 13 (FIG. 1) has an air amplification function. After the compressed air is jetted onto the mask, it is sprayed on the inner surface of the decontamination / cleaning section. It is supposed to be.
Further, the disinfecting spray is driven by compressed air by operating the disinfecting air switch 14 (FIG. 1), and the disinfecting ethanol in the disinfecting liquid tank 15 is uniformly sprayed on the target mask a. It comes to spray.
The decontamination / cleaning space is maintained at a negative pressure by the exhaust fan 16 so that the contaminated atmosphere inside does not leak outside even when the door 2 is opened and closed.
[0012]
FIG. 9 shows a hook receiver 3 provided integrally with the lower portion of the door 2. The door 2 is supported by a hinge 2b and can be opened by pulling forward with the handle 2a. The lower part of the door 2 is provided with a saddle receiver 3 tilted toward the hinge 2b as shown in FIG. 9C. Through the tank 6.
[0013]
(Operation)
1) Open the door 2 forward and hang the protective mask a on the mask fixing frame 10 of the cleaning basket 7.
2) Close the door 2.
3) At the same time as starting the motor 9 and rotating the washing basket 7, the washing water pump 4 is driven to spray washing water from the spray nozzle 5 and hung on the upper and lower fixed frames 10, 10 '. Wash the mask a.
4) After a predetermined time, the air blow switch 13 is operated to dry.
5) The dried mask a is sterilized by operating the sterilizing air switch 14 and spraying it from the air nozzle.
6) Complete, open door 2 and remove mask a.
[0014]
【effect】
According to the first aspect, the cleaning of the mask can be automated, and the decontamination cleaning operation can be performed safely and easily.
According to the second aspect, since the driving power can be supplied from the same supply source, the apparatus can be made compact.
According to the third aspect, the mask a can be easily put in and out of the decontamination / cleaning part by opening and closing the door, and the attachment to the cleaning part is simply hooked on the mask fixing frame, so that the operation is easy. .
According to the fourth aspect of the present invention, since every other mask fixing frame is raised and lowered, the apparatus can also be made compact.
According to the fifth aspect of the present invention, the scissor receptacle provided at the bottom of the sight glass door can return all of the contaminated cleaning water adhering to the inside of the door when the door is opened from the lower part of the door to the tank without scattering. .
[Brief description of the drawings]
FIG. 1 is a front view showing an example of the device of the present invention.
FIG. 2 is a top view of the pump and cleaning basket.
FIG. 3 is a top view of the drive system.
FIG. 4 shows a driving system of a cleaning basket.
FIG. 5 shows a fixed state of the mask to the cleaning basket.
FIG. 6 shows an example of a cleaning basket.
FIG. 7 is a side view of a cleaning basket.
FIG. 8 is a detailed view of a fixed frame.
FIG. 9 shows a hook receiving of the door.
[Explanation of symbols]
a Mask 1 Decontamination / cleaning part 1 'Decontamination / cleaning part 2 Door 2a Handle
2b Hinge 3 雫 Receiving 4 Washing water pump 5 Spray nozzle 5 'Air nozzle 6 Tank 7 Cleaning basket 8 Drive shaft 9 Motor 10, 10' Mask fixing frame
10a Fixed part 10b Upper horizontal part
10c Vertical support 10d Bottom horizontal
10e Rise 10f Middle horizontal
11 Fixed disk 12 Support ring
13 Air blow switch 14 Disinfection air switch
15 Disinfectant tank 16 Exhaust fan

Claims (5)

A plurality of rotary masks (a) that can be rotated by a drive shaft (8) and can be rotated by a drive shaft (8) in the removal of radioactivity adhering to a protective mask used as a respirator in a nuclear power plant and cleaning of general dirt. A decontamination / cleaning section (1) having a cleaning basket (7) having a mask fixing frame (10, 10 '), and a high-pressure spray nozzle (5) in the decontamination / cleaning section (1). ) And an air-nozzle (5 ') for drying and disinfecting water spraying, and removal of protective masks used in nuclear power plants equipped with an exhaust device that prevents leakage of contaminated atmosphere inside the device. Dyeing / cleaning equipment. The decontamination / protection of the protective mask used in the nuclear power plant of claim 1 having a full-scale protective mask decontamination / cleaning part (1 ') that sends the driving power of the high-pressure pump and the compressed air supply power from the same source Cleaning device. The cleaning basket (7) provided in the decontamination / cleaning section (1) is connected to the mask fixing frame mounting disk (11) fixed to the lower end of the drive shaft (8) and the mask fixing frame mounting disk (11). The mask fixing frame (10) is arranged at equal intervals, and the mask (a) is put in and out of the decontamination / cleaning section (1) by opening and closing the door (2) with a viewing window. Decontamination / cleaning equipment for protective masks used in nuclear power plants. A protective mask for use in a nuclear power plant according to claim 3, wherein a mask fixing frame (10) having a high mask hook portion and a mask fixing frame (10 ') having a low mask hook portion are alternately arranged on the cleaning basket (7). Decontamination / cleaning equipment. The decontamination / cleaning device for a protective mask used in a nuclear power plant according to claim 3, wherein a guard (3) inclined toward the door mounting side is provided at the bottom of the door with the viewing window (2).

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