JP2687308B2 - Work glove box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work glove box used in the nuclear power plant such as a nuclear fuel facility.
In particular, the present invention relates to a work glove box whose panel can be easily replaced.

[0002]

2. Description of the Related Art Conventionally, a so-called work glove box is used when performing various works in a nuclear facility such as a nuclear fuel facility. This work glove box is used to handle nuclear fuel substances and the like in a sealed state isolated from the outside world, and generally consists of a box-shaped airtight container, the ceiling surface and bottom surface of which are made of stainless steel, and the side surface of the box. Etc. are composed of a transparent glove panel made of resin. Further, rubber gloves are attached to various parts of the glove panel, and hands are inserted into the gloves to operate the internal devices and equipment.

For example, in order to process a nuclear fuel material into a twisted material for a nuclear power plant, it is necessary to perform operations such as melting, preparation, drying, granulation, roasting reduction, polishing shaping, measurement, and assembly of the nuclear fuel material. . Devices and equipment for performing these operations are housed and processed in this work glove box as needed. As a result, dirt due to processing waste, dust, powder, grease, etc., is generated during operation, and the inner surface of the glove panel of the work glove box gradually becomes clouded and hinders the visibility.

In addition, the inner surface of the glove panel may be damaged due to long-term use, and the visibility may gradually deteriorate. In particular, in a work glove box that uses a chemical such as nitric acid, the inner surface of the panel is etched due to corrosion by such acidic substances, and in the case of a work glove box with a high external radiation dose rate, the resin The safety of the transparent panel deteriorates due to radiation deterioration and its visibility deteriorates.

Therefore, in such a work glove box, it is necessary to clean the glove panel as needed. Further deteriorated glove panels need to be replaced. An example of a method of exchanging a glove panel of a work glove box that has been generally used in the past will be described with reference to the attached FIG. The glove box 100 is kept at a negative pressure in order to prevent the inside pollution from spreading to the outside.

First, a bag 2 made of pinil sheet is provided around the glove panel 1 of the glove box 100 to be replaced.
Is installed so that airtightness can be maintained, so that even if the glove panel 1 is removed, contamination inside the work glove box is prevented from spreading throughout the room. In addition, a new glove panel 8 to be replaced is put in the bag 2 in advance.

As a work procedure, the bolts and the sash frame which fix the glove panel 1 are removed, and the panel 1 is removed. Next, the new panel 8 is attached in the reverse order, and the replacement is completed. These operations are performed via the bag 2. further,
After removing the radioactive contamination inside the bag 2,
Remove.

[0008]

In the conventional glove box, when the glove panel 1 is removed, the inside of the bag 2 has the same negative pressure as the inside of the glove box 100, and the bag 2 is sucked into the glove box 100. Collapse. Therefore, workability in it is extremely poor. On the other hand, if the negative pressure in the glove box 100 is weakened, the workability is improved, but since the atmospheric pressure is high, there is a concern that the contamination will diffuse to the outside. Moreover, when the glove panel 1 is removed, there is a problem that a large amount of contamination in the glove box spreads from the opening into the bag 2.

As described above, in the conventional glove box, it is actually extremely difficult to replace the glove panel because it takes a long period of time and costs a lot to replace the glove panel. In view of the above-mentioned problems in the prior art, it is therefore an object of the present invention to provide a work glove box capable of easily replacing a glove panel while preventing the diffusion of contamination.

[0010]

In order to achieve the above-mentioned object, in the present invention, in order to improve the workability of exchanging the glove panel, a holding plate can be attached to the back of the glove panel. is there.

That is, the working glove box according to the present invention is an airtight box-shaped glove box, a groove panel attached so as to hermetically close the opening of the glove box, and a work attached to the glove panel. And a glove panel for detachably attaching the glove panel to the glove box and detachably attached to the rear side of the groove panel, the glove box having a closing plate for closing the opening of the glove box. Is characterized by.

The holding plate is preferably detachably attached to a frame portion provided inside the glove box, and the frame portion may be a guide-like member for slidably supporting the holding plate. Further, two or more sealing plates adhered to each other are attached to the front surface of the pressing plate . Also,
A sealing plate is airtightly attached to the front surface of the pressing plate via a frame member that is detachable from the pressing plate and detachable from the glove box side .

[0013]

In the working glove box according to the present invention described above, when the glove panel is replaced, a holding plate is attached to the back of the glove box, so that the inside and outside of the glove box are blocked by the holding plate. Due to the negative pressure, the bag attached to the outside of the glove panel will not be sucked into the glove box. Therefore, workability in the bag is improved. Further, this holding plate prevents the contamination in the glove box from diffusing into the bag through the opening when the panel is removed. As a result, it is possible to obtain a work glove box in which the diffusion of contamination is prevented and the glove panel can be easily replaced. Further, if a frame portion is provided inside the glove box, the pressing plate can be easily moved and fixed at a predetermined position.

The back surface of the glove panel facing the inside of the glove box and the surface of the holding plate previously inserted in the glove box are contaminated by radioactivity in the glove box. Therefore, when the glove panel is removed, the back surface of the glove panel and the front surface of the holding plate, which are radioactively contaminated, may be exposed to the work bag side and the pollution may be diffused.

However, in the case where two or more sealing plates adhered to each other are attached to the front surface of the pressing plate, the frontmost sealing plate is attached to the rear surface of the glove panel when the glove panel is removed. When attaching and removing the glove panel, if the surfaces of the sealing plates that are adhered to each other are peeled off, the adhesive surface of the uncontaminated sealing plate will appear outside and the contaminated surface will be covered with the sealing plate. .

Further, the sealing plate is airtightly attached to the front surface of the pressing plate via a frame member which is detachable from the pressing plate and detachable from the glove box side. Since the front surface of the holding plate is covered with the sealing plate, it is not contaminated by radioactivity in the glove box. Moreover, when removing the glove panel, if the frame member of the sealing plate is attached to the glove panel side and separated from the holding plate,
A sealing plate, in turn, covers and seals the contaminated back surface of the glove panel.

[0017]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows a glove box 200 according to an embodiment of the present invention, in which the glove box 200 is mounted on a base 210 having four legs. The glove box 200 is made of an airtight box-shaped container, has a ceiling surface and a bottom surface made of stainless steel, etc., and a plurality of transparent glove panels 220 made of resin or the like in a rectangular opening provided on the side surface 201. 220 ... Are attached and hermetically sealed. These glove panels 220, 220, ...
21 ... are attached. These gloves 221, 2
In the illustrated example, four 21 are attached. FIG.
., The glove panels 220, 220 ...
The sash frame 226 is pressed down by a bolt 225.

In the embodiment shown in FIG. 1, a plurality of transparent glove panels 220, 220 ... Are attached to opposite side surfaces, and these glove panels 220, 220.
Two gloves are attached. Further, in the glove box 200, a holding plate 230 that can be attached to the inside of the glove panel 220 is housed. In the embodiment of FIG. 1, the holding plate 230 is a square plate having substantially the same size as the glove panel 200.

In the illustrated embodiment, the holding plate 2 is attached to the end surface 203 of the glove box 200 by a method such as bag-in.
An insertion port 240 for inserting 30 is provided.
However, the holding plate 230 is not attached to the glove box 20 in advance.
It may be stored in 0.

Further, inside the glove box 200, frame parts 250, 250 for attaching the pressing plate 230 to the back side of the glove panel 220 and fixing bolts for fixing the pressing plate 230 from the back side of the glove box 200. 260, 260 ', 260 "are provided.
The frame parts 250, 250, ... Are rail-shaped members provided in parallel, and the holding plates 230 are attached to the frame parts 250, 250.
The upper and lower edges of the are fitted slidably and can be slid behind one of the glove panels 230 to move. Fixing bolts 260, 260 ', 26
0 ″ is provided for each glove panel 220, 220. By tightening these fixing bolts 260 ′, 260 ″, the pressing plate 230 can be fixed to the back of each glove panel 220, and by loosening, the pressing plate 230 can be fixed. Two
Allows 30 moves. Further, the frame parts 250, 250
A cutout 251 for facilitating the fitting of the pressing plate 230 is provided on the.

As a means for attaching the holding plate 230,
It goes without saying that many other means are possible other than the above-mentioned frame portion 250. In the illustrated glove box, the holding plate 230 fitted in the frame portions 250, 250 ... Is moved to the back of the panel 220 to be replaced, and the fixing bolts 260, 260 ...
20 or the glove 221 of the adjacent glove panel 220
Tighten with the hand inserted into. Figure 1 is on one side 3
The pressing plate 230 is fixed to the back side of the central glove panel 220 of the glove panels 220, 220. If the hands inserted into the globe 221 do not reach the fixing bolts 260, 260, ..., For example, it is possible to use a long tool such as a long torque wrench to tighten them.

FIG. 2 shows a cross section near the glove panel 220 to be replaced in the above-mentioned glove box 200. The bag 27 made of pinil sheet covers the outer surface (front surface) of the glove panel 220 to be replaced.
0 is attached, and this is sealed with gum tape 271 or the like so that airtightness can be maintained. Thus, even if the side panel 220 is removed, the contamination inside the glove box 200 is prevented from spreading to the outside. A plurality of working gloves 275 are attached to the bag 270, and hands are inserted into these gloves to perform the replacement work. Note that FIG. 2 shows a state before the pressing plate 230 is fitted into the frame portion 250.

When replacing the glove panel 220,
First, as described above, from the cutout 251 to the pressing plate 23.
0 is fitted into the frame portion 250, and the fixing bolt 260 is tightened to fix the holding plate 230 behind the glove panel 220 to be replaced. Next, using the tool 272 or the like, the sash frame 2 to which the glove panel 220 is attached
26 and its bolt 225 are removed. The removed one is
It is stored in a bag 277 inside the bag 270 so as not to be contaminated. After this, the panel 220 is removed. Meanwhile, bag 2
A new glove panel 220 ′ for replacement is previously placed in the 70. The front surface of the new glove panel 220 'may be covered with a curing sheet so that contamination does not adhere to the front surface. Next, tool 2
72 or the like to attach a new panel 220 'to the bag 27
The sash frame 226 and Porto 2 previously stored in 7
Reattach 25 to the side of the glove box 200.

Further, the inner surface of the bag 270 and the tool 27.
Wes 27 with 2 etc. in the bag 270
The radioactive contamination is removed by repeatedly wiping with No. 3. Then, the bag 270 is removed and removed. In addition, at the time of this replacement work, the blower 2 for keeping the inside of the bag 270 at an appropriate negative pressure as needed.
80 is provided, and suction is performed via the filter 285. Also, in order to keep the negative pressure in the bag 270 appropriate,
A so-called inlet filter 290 is provided.

During this replacement work, the holding plate 23
0 indicates that the inside of the glove box 200 is contaminated from the opening when the transparent panel 220 to be replaced is removed.
Limit diffusion into 0. Therefore, the holding plate 230 is put in the glove box 200 in advance, or is inserted from the outside when necessary. Further, the holding plate 230 can be moved and attached to the back of any glove panel 220 of the glove box 200. Frame part 25 provided inside the glove box 200
0, 250 facilitate this operation.

The holding plate 230 is the glove box 2
Since it is inserted into the glove box 200, its surface may be contaminated by radioactivity in the glove box 200. Therefore, the panel 220 is attached to the glove box 2
When removed from the bag 2, the contaminants adhering to the back surface of the glove panel 220 and the front surface of the holding plate 230 are removed from the bag 2.
The contamination will diffuse within 70. Therefore, the presser plate 2
The two sealing plates are pasted on the front surface of 30. When removing the glove panel 220, the two sealing plates are peeled off, and one of the peeled sealing plates is removed. If the other one is left on the front surface of the holding plate 230 on the back surface of the above, the non-contaminated release surface of the two sealing plates faces the outside, and the glove panel 220 and the holding plate 230.
The contaminated back and front sides of the are covered with respective sealing plates. As a result, it is possible to prevent the diffusion of contamination in the bag 270.

In the embodiment shown in FIG. 2, the above-mentioned sealing plates 231 and 232 are attached to the front surface of the holding plate 230 attached to the back of the glove panel 220. The sealing plates 231 and 232 are bonded to each other, and one sealing plate 232 is attached to the front surface of the sealing plate 230. The adhesive surfaces of the two sealing plates 231 and 232 are in close contact with each other so that radioactive contamination does not progress, but the force of this contact is not strong.

Next, the sealing plate 23 having such a two-piece structure
A method of using 1, 232 will be described with reference to FIG. First, as shown in FIG. 3A, the holding plate 230 is attached to the frame portion 250. Further, the two sealing plates 231, 232 are attached to the front surface of the pressing plate 230 as described above. At this point, a double-sided tape is attached to the rear surface a of the transparent panel 220 to be replaced or an adhesive is applied on the rear surface a to provide a sticky surface that can be adhered. Alternatively, the front surface of the sealing plate 231 may be an adhesive surface.

Next, as shown in FIG. 3B, the fixing bolt 260 is tightened to fix the holding plate 230 to the frame portion 250. At this time, the front surface of the sealing plate 231 is bonded and fixed to the back surface of the glove panel 220. Further, FIG.
As shown in (C), the bolt 225 fixing the glove panel 220 is loosened, and the sash frame 226 is removed.

Subsequently, as shown in FIG. 3D, the transparent panel 220 is removed from the glove box 200. At this time, the sealing plate 231 is peeled from the other one of the sealing plates 232 while being adhered to the back surface of the globe panel 220.
Separated. Further, as shown in FIG. 3 (E), a new panel 220 'is attached. FIG. 3 (F) shows a sash frame 2
26 is attached to the glove box 200 and the panel bolt 225 is tightened. Finally, FIG. 3G shows a state in which the holding plate fixing bolt 260 is loosened and the holding plate 230 is removed from the frame portion 250.
At this time, the sealing plate 232 remaining on the holding plate 230 is removed to prepare for the next replacement of the glove panel 220. Then, the inside of the bag 270 (see FIG. 2) is inspected for contamination, and the bag 270 is removed. Note that the sealing plates 231, 232
May be two or more, and therefore three or more may be laminated.

Next, as another embodiment of the present invention, a holding plate 230 'having an isolation / separation mechanism different from the holding plate 230 will be described. FIG. 4 is a cross-sectional view of a panel mounting portion using a holding plate 230 ′ having an isolation / separation mechanism. As shown in FIG. 4 (A), in the glove box 200, the pressing plate 230 ′ and the sealing plate 231 ′ are stored in a state of being bonded to each other via the frame member 234 at an interval, and therefore, The opposing surfaces of the two and the space b therebetween are not contaminated. At this time, the bolts 225 ', 227, 233 are tightened.

Next, as shown in FIG. 4B, the holding plate 2
30 'is attached to the back of the glove panel 220, and the frame portion 25 of the glove box 200 is fixed by bolts 260'.
Tighten it to 0'to fix it. Next, the glove panel 22
The bolt 227 closing the screw hole of the frame member 228 of 0 is pulled out while paying attention to the contamination, the bolt 227 'longer than this screw hole is inserted, and the tip of the screw 227' is pressed by the sealing plate 231 '. Insert into the screw hole of the frame member 234 fixed to the plate 230 'and tighten. Accordingly, the frame member 228 of the glove panel 220 is attached to the frame member 234.
Fixed to

Thereafter, as shown in FIG. 4C, the frame member 228 of the glove panel 220 is attached to the glove box 20.
The bolt 225 ′ fixed to the frame part 250 ′ of 0 and the bolt 233 fixing the pressing plate 230 ′ to the frame member 234 of the sealing plate 231 ′ are pulled out. As a result, with the sealing plate 231 ′ attached to the back surface of the glove panel 220 via the frame members 228 and 234, the glove box 200 extends from the frame portion 250 ′ of the glove box 200.
Can be removed. Accordingly, the contaminated back surface of the glove panel 220 can be removed while being covered with the sealing plate 231 ′, and the sealing plate 23 facing the outside can be removed.
The back surface of 1'is the space b between the holding plate 230 'and
Since it was sealed (see FIG. 4 (A)), it was not contaminated.

Next, a new glove panel 220 to which a sealing plate 231 previously placed in the bag 270 is fixed.
Are attached in the reverse order of the above. At this time, presser plate 2
The combination of 30 and the sealing plate 231 'is stored in the glove box 200 and prepared for the next panel replacement. In addition, the attachment and detachment of the bolts 260 'and 233 are
Glove 2 on the opposite side or adjacent glove panel 220
21. In addition, as means for sealing the contaminated surface of the back surface of the glove panel 220 and the front surface of the pressing plate 230,
In addition to the means using the above-mentioned sealing plate, the glove panel 2
There is also a means for applying a resin paint to the contaminated surface of the rear surface of 20 and the front surface of the holding plate 230.

[0035]

As is apparent from the above detailed description, according to the working glove box of the present invention, by using the holding plate 230, the inside of the working glove box can be removed when the glove panel is removed. Since the negative pressure can be prevented from directly hitting the work bag, the exchange workability is extremely improved. Further, the negative pressure in the glove box at that time is also maintained almost as usual, and it is possible to reliably prevent the diffusion of contamination from the opening where the glove panel 220 is removed, and at the same time, inside the removed panel and outside the glove box. Since the contamination of the facing portion can be minimized, the diffusion of contamination can be almost eliminated.

[Brief description of the drawings]

FIG. 1 is a perspective view in which a part of a work glove box according to an embodiment of the present invention is cut away.

FIG. 2 is a cross-sectional view of a main part of the work glove box in a state where a glove panel is replaced.

FIG. 3 is a vertical cross-sectional side view showing, in a partially enlarged manner, a holding plate and a mounting portion thereof in a panel replacement procedure in the working glove box embodiment.

FIG. 4 illustrates a panel replacement procedure according to another embodiment of the present invention.
It is a vertical side view explanatory drawing which partially enlarged and showed the attachment part of the presser plate with an isolation / separation mechanism.

FIG. 5 is a cross-sectional view of essential parts of a work glove box and a replacement bag showing a conventional panel replacement method.

[Explanation of symbols]

200 glove box 220, 220 'glove panel 221 glove 230, 230' holding plate 231, 231 ' , 232 sealing plate 234 frame member 240 insertion port 250 frame part 260, 260', 260 "fixing bolt 270 bag 275 for work Globe

Claims (4)

(57) [Claims] 1. An airtight box-shaped glove box (20)
0) and a glove panel (22 attached so as to hermetically close the opening of the glove box (200).
0), (220 ') and this glove panel (22
Work gloves attached to 0) and (220 ')
In working glove box having a (221), said glove panel (220), (220 ') with freely attached detachably to the opening of the glove box (200), grayed b Bupaneru (220), (220')
Detachably attached to the back side of the panel (22
0), (220 ') closed glove box (20
0) Holding plates (230), (230 ') for closing the opening
And the front surface of the holding plate (230) is bonded to each other.
Attached two or more sealing plates (231) and (232)
Lighted have a working glove box, wherein the Rukoto. 2. The work glove box according to claim 1, wherein the holding plate (230) is detachably attached to a frame portion (250) provided inside the glove box (200) . 3. The holding plate (23 ) is provided on the frame portion (250).
The work glove box according to claim 2, wherein the work glove box comprises a guide-like member for slidably supporting ( 0) . 4. An airtight box-shaped glove box (20)
0) and the opening of this glove box (200).
Glove panel (22
0), (220 ') and this glove panel (22
Work gloves attached to 0) and (220 ')
(221) and work glove box odor
The glove panels (220) and (220 ').
Removably attached to the opening of the robe box (200)
Glove panel (220), (220 ')
Detachably attached to the back side of the panel (22
0), (220 ') closed glove box (20
It is equipped with a holding plate (230 ') that closes the opening of 0).
The holding plate (230 ') is attached to the front surface of the holding plate (230').
Removable with respect to the glove box (2
(00) side is also sealed via a removable frame member (234)
Features that plate (231 ') is mounted airtightly
Working glove box to be.