JPH0523918B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] It relates to an airtight box that can be completely isolated from the outside air because it is required to handle radioactive substances, toxic or harmful substances, or to handle them in extremely clean conditions. It is.

[Background of the invention]

Conventionally, in facilities and equipment that handle hazardous substances, methods such as installing a local exhaust system or operating them in a ventilation hood have been taken.

However, in the case of large-scale equipment, if the entire equipment is placed inside a hood, work efficiency will be affected when maintenance is performed. It is necessary to improve the Furthermore, as the scale of equipment increases. There were various problems in reducing the size of the building housing these facilities and in reducing the size of the building's ancillary equipment, such as ventilation and air conditioning equipment, drainage equipment, and certification equipment.

For example, in the process of producing plutonium fuel for fast breeder reactors, PuO ₂ and UO ₂ are both radioactive substances and are therefore handled in a building under radiation control, and because PuO ₂ is highly toxic, an airtight box is installed inside the room. This will be dealt with in this section.

For this reason, if many manufacturing processes are all housed in one airtight work glove box (hereinafter simply referred to as the glove box), if a failure occurs in a part of the process, the entire process must be stopped. Therefore, a method has been adopted in which the equipment for each process of manufacturing pro-hos is housed in one glove box, and each glove box is connected with an airtight box for transporting fuel.

An example is shown in FIG. The glove box 7 is fixed to the floor by a pedestal 8, and the glove box 7
Contains the necessary equipment. The equipment is connected to equipment inside the glove box 7 via a separately provided control device and power supply terminal 9 without impairing the airtightness of the glove box 7. The side surface of the glove box 7 is closed by a transparent acrylic plate 10 to maintain the airtightness of the glove box 7 and to enable manual replacement of parts through a port 11 provided with means. Depending on the size of the parts, there are entrances and exits 12 and 13 provided on the side of the glove box 7.
Take things in and out. Gases necessary for the apparatus are introduced into the glove box 7 through the inlet 14.

For ventilation inside the glove box 7, indoor air is sucked in through an air supply filter 15 provided at the bottom of the glove box 7, and is sent through an exhaust port 16 to the exhaust treatment equipment of the building.

The glove box 7 has an opening into the room through the air supply filter 15, but since the air inside the glove box 7 is sucked in by the building exhaust treatment equipment, the inside of the glove box 7 is maintained at a negative pressure from the indoor pressure. Airtightness is ensured by preventing internal air from escaping into the room.

Now, PuO ₂ used in Glovebox 7,
The UO ₂ is taken in and out through a transport tunnel 17 provided on the side of the box 7.

The glove box 7 and the transport tunnel 17
Figure 3 shows the arrangement in which these are connected. Figure 3 is from the Journal of the Atomic Energy Society, Vol. 14, No. 3, page 126. Nuclear Industry Vol. 18 9 has the same concept.
Issue, pages 77-78.

This method centers around a transport tunnel, with equipment placed on either side.

Figure 4 shows the plutonium fuel processing facility described in Atomic Energy Industry Vol. 18, No. 9, page 78.

This system has a so-called fishbone-shaped configuration in which the transport tunnel and glove box are obliquely illuminated.

In any case, as shown in FIGS. 3 and 4, the glove boxes containing the equipment are arranged around a transport box.

However, when working, there is a risk that workers will be exposed to radiation from their abdomen and back, and there is a restriction in the arrangement of equipment boxes that they must be spaced at certain intervals in consideration of the air dose rate. Moreover, since the conveyance equipment is common to each piece of equipment, as the capacity of the equipment increases, a system as shown in FIG. 3 is adopted in which the conveyance equipment is divided into two lines. However, since the conveyance equipment is shared by each facility, it is used frequently, so a method is used to increase the overall capacity without increasing the total number of conveyances by increasing the amount of conveyance per round. It's starting to look like this.
That is, as shown in Fig. 2, a transport tunnel was provided on a part of the side of the glove box, but the fifth
As shown in FIG. 6, a large airtight transport box (hereinafter simply referred to as a transport box) is provided.

5 and 6 are those described in Japanese Patent Application Laid-Open No. 58-219484, and FIG. 5 is a front view, and FIG. 6 is a side view of FIG. 5. Equipment is glove box 18
A transport box 19 is placed above the glove box 18 to transfer fuel between the glove boxes. glove box 18
is fixed directly to the floor, and the transport box 19 is fixed on a beam 21 supported by pillars 20 from the floor. Above the pillars 20 there is a grating floor 22 necessary for the operation of the transport box 19.

A large port 25 and a small port 26 are provided on the sides of the glove box 18 and the transport box 19, respectively, for temporarily loading and unloading necessary tools and parts during maintenance and the like. The large port 25 and the small port 26 are used depending on the size of the articles being taken in and out. This is because leakage is likely to occur when taking items in and out, so it is better to take out small items through the small small port 26, and the large port 25 is used only when the small port 26 cannot be used. To ventilate the glove box 18 and the transport box 19, indoor air is introduced into the glove box 18 through the air supply filter 27 and enters the transport box 19 through the connecting pipe 28 between the glove box 18 and the transport box 19. The air is then sent to the building exhaust treatment equipment through an exhaust filter 29 provided at the top, where it is processed.

However, when the glove boxes 18 are arranged as shown in FIG. 3, a transport tunnel (hereinafter referred to as a tunnel) corresponding to the tunnel 17 in FIG. 3 is required to connect each transport box 19. . This is shown in FIG.

There is a method of connecting the tunnel 30 above or below the transport box 19, but in order to reduce the height of the building, it is better to arrange it below the transport box 19.

Although the conventional examples have been described above, there have been various problems with these arrangements.

For example, as shown in Figures 5 and 6, the height of the grating 22 for the transport box 19 is approximately 3,500 mm above the floor, and the top plate of the transport box is approximately 5,000 mm, making the entire structure higher, which is disadvantageous in terms of earthquake resistance. Become. Furthermore, in order to replace the exhaust filter 29 as appropriate, stairs to access the grating 22 are required at various locations. In addition, since the grating height is 3500mm, great care must be taken when working at heights, which impairs workability during maintenance. As explained in FIGS. 3 and 4, since it is necessary to leave a certain distance between glove boxes, a gap is created between the gratings of adjacent boxes. Of course, it is possible to avoid voids, but in this case the illuminance under the gratings will be reduced, so lighting will also be provided under the gratings, and all gratings will be connected at a height of 3500mm above the floor, which will complicate the seismic design. Ta. Furthermore, in terms of earthquake-resistant design, it is best to avoid placing objects on the grating 22 as much as possible, which reduces the space utilization rate. For this reason, there was a problem that the entire building became taller and wider.

Furthermore, in the installation part of the transport box 19 and the tunnel 30, the bottom of the tunnel 30 is 2000 mm above the floor.
2500 mm, it is difficult to utilize the lower part, and when transferring goods between the transport box 19 and the tunnel 30, it is necessary to go up and down, which means that there are many pieces of equipment and it takes time to operate. There was a problem.

In addition, instead of greatly ventilating the entire room, we use a glove box and only greatly ventilate the inside of the glove box, reducing the ventilation rate of the room.
Although attempts were made to reduce the capacity of the exhaust gas treatment equipment, there was a problem in that the capacity of the ventilation equipment increased as the volume of the room to be ventilated increased as described above.

[Purpose of the invention]

The purpose of the present invention is to improve workability during maintenance by changing the positions of the transport box and the transport tunnel, and installing an exhaust filter, hydraulic unit, and utility piping between the transport airtight boxes, and to improve the workability in the room. The goal is to increase usage.

Another object of the present invention is to provide a group of airtight glove boxes for handling toxic substances that are advantageous in terms of earthquake resistance by reducing the overall height of the equipment.

[Summary of the invention]

In order to achieve the above object, the present invention includes a work airtight glove box installed in each process for treating toxic substances, and a work airtight glove box connected to the work airtight glove box. a transport airtight box for transporting the treated toxic substance; and a plurality of airtight transport boxes connected to the work airtight glove box to transport the toxic substance treated in the work airtight glove box between the transport airtight boxes. work for processing toxic substances, comprising a transportation tunnel for transporting the toxic materials, and a trolley for transporting the treated toxic materials that moves on rails provided in the transport airtight box and the transport tunnel. In the group of airtight glove boxes for work, the airtight box for transport is provided below the airtight glove box for work, and the tunnel for transport is connected to the airtight box for transport at the same height, and the airtight box for transport is connected to the airtight box for transport at the same height. It is characterized in that an exhaust filter, a hydraulic unit, and utility piping are provided in between.

Another feature is that the airtight box for transportation and the tunnel for transportation are provided under the floor on which the airtight glove box for work is installed.

Furthermore, another feature is that in the airtight transport tunnel, a turntable for changing the course of the truck is provided in the course changing section.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to FIGS. 1, 8 and 9.

FIG. 1 is a view of the connected state of the glove box 1 and the transport box 2 viewed from the longitudinal direction. The glove box 1 is fixed to a grating (floor) 4 supported from the building floor by pillars 3 by fastening methods such as bolts. The transport box 2 is fixed to the glove box 1 by a connecting pipe 5. In Fig. 1, the columns 3 are installed between the rows of glove boxes, but the columns 3 may be installed every other row or every third row as appropriate depending on the weight of the glove boxes 1 and the rigidity of the grating 4. can be provided. Furthermore, there is no need to construct walls parallel to the box due to the pillars 3, and it becomes possible to place an exhaust filter or the like by utilizing the space between the pillars 3 in the longitudinal direction.

In order to arrange the transport box 2 under the glove box 1 in this way, in addition to the method of installing the grating 4 installed from the building floor via the pillars 3 as shown in Fig. 1, the method shown in Figs. There is a method of installing trenches on the building floor.

8 and 9 will be explained below. The difference from FIG. 1 is that the ends of the grating 4 are fixed to the building floor. Pillars 3 are provided between the glove boxes 1 and support the grating 4. 1st
As in the figure, the arrangement of the pillars 3 can be appropriately selected depending on the rigidity of the grating 4 and the weight of the box.

To ventilate the inside of the glove box 1, the indoor air is purified through the air supply filter 6 and introduced into the glove box 1, and then enters the transport box 2 through the connecting pipe 5.

FIG. 9 is a plan view of the glove box group shown in FIG. 8. The air that entered the transport box 2 is
After being cleaned again by the exhaust filter 31 arranged between the transport boxes 2 in the trench with piping,
The exhaust pipe 32 sends the air to the building exhaust equipment. Hydraulic unit 3 is located where there is no exhaust filter 31.
By arranging equipment that does not need to be housed in the glove box 1, such as 3, etc., only the installation box 1 is left on the grating 4.

Now, the tunnel provided at the end of the transport box 2 mentioned in the conventional example will be explained with reference to FIG.

FIG. 10 shows a plane below the grating for ease of explanation. The transport box 2 is
If there are two or more rows, a glove box having the same structure as the transport box 1 connecting them is provided at the end. For comparison with the conventional example, the tunnel 43 will be referred to as having the same function.

The tunnel 43 may be provided when there are two or more rows of transport boxes 2, and the exhaust nozzle shown in FIG. They may be placed in a convenient position such as near the center of the equipment in a so-called skewer-shaped arrangement, or there may be two of them. These methods do not limit the scope of the present invention.

A maintenance area 42 is appropriately arranged near the intersection of the transport boxes . . . and the tunnel 43. This is transport box 2 and tunnel 43
This is an area for maintenance of the trolleys that move inside.

In the area sandwiched between the transport boxes 2, for example, machinery such as a utility unit 34, utility piping 35, and exhaust piping 32 are mainly placed between and, and electrical ducts 36 and meters are placed between and. There is also a method of arranging mainly electrical components such as the mounting duct 37 and the like. This is an example of an arrangement where if there is a water pipe as a utility pipe, it is desired to prevent the insulation of electrical equipment from deteriorating due to water leakage.

In order to draw out the pipes such as the exhaust pipe 32 and the ducts 36, 37, etc. arranged in this way above the floor, they pass through the lower part of the tunnel 43 and are drawn out at the rising parts such as the pipe shaft 40 and the duct shaft 41.

A method of transporting fuel from the transport box 2 to the tunnel 43 or vice versa will be explained with reference to FIGS. 11 and 12. FIG. 11 is a plan view of the intersection 44 between the transport box 2 and the tunnel 43, and FIG. 12 is a sectional view thereof.

When moving from the transport box 2 to the tunnel 43, the turntable 4 provided at the intersection 44
The rail 47 of No. 5 is the rail 4 of the transport box 2.
It is parallel to 6. The trolley moves from the rail of the transport box 2 to the turntable 45, and after completely riding on it, rotates the turntable 45 90 degrees to make the rail 47 of the turntable 45 parallel to the rail 48 of the tunnel 43, and turns the trolley. Move from table 45 to the tunnel side. As a result, the number of carts is reduced to 2 transport boxes and 4 tunnels.
It is not necessary to provide one cart for each of the three carts, and the number of carts may be determined according to the conveyance amount.

FIG. 12 shows a cross section of the turntable 45.
An example is shown in which the turntable 45 is driven by reducing the rotational speed of a drive motor 49 by a reduction gear 50. The turntable 45 is shown to be driven by a speed reducer 50, but it may be slowed down by a timing belt or directly driven by a speed reduction motor, as long as it can be driven at a low speed. Changing the direction of the tracked cart using the turntable 45 is a method that has been used for a long time, but by using this method, the transport box 2 and the tunnel 43 are not stacked one on top of the other.
Can be connected at the same height.

As shown in FIG. 12, the intersection section 44 is equipped with a turntable 45 and rotating machines such as a drive motor 49 and a speed reducer 50 for moving the turntable 45, so that it is necessary to carry out maintenance as necessary or to repair or replace malfunctioning parts. It is necessary to exchange the

The maintenance area 42 in FIG. 10 is a space for performing these operations, but the maintenance area 42 in FIG.
As shown in the figure, a glove port 52 is provided on the outer periphery of the intersection portion 44.
Perform maintenance etc. using gloves attached to the machine. As shown in FIG. 12, the glove ports 52 and 54 are located at locations where maintenance is required. For example, the glove port 52 is for a truck, and the glove port 54 is for maintenance of the drive section of the turntable 45. These glove ports 52 and 54 are
They are fixed to colorless and transparent acrylic plates 51 and 53, respectively. The acrylic plates 51 and 53 may be made of a material such as tempered glass or polycarbonate, as long as they are transparent so that the inside can be easily seen. Tools and replacement parts necessary for maintenance are put in through the carry-in/out port 55. Also, the failed parts are similarly carried out through the carry-in/out port 55.

The loading/unloading port for trolley parts is shown in Figure 11, 1.
Although omitted in both figures, the glove port 54
It is provided above the glove port 52 at the same height as the glove port 52. This is because it is difficult to move the component from the loading/unloading port 55 to the upper side of the turntable 45.

〔Effect of the invention〕

According to the present invention, by providing the transport box and the transport tunnel at the bottom of the glove box, which were conventionally located at the upper part of the glove box, it is no longer necessary to work at heights when maintaining the transport box and the transport tunnel, improving work efficiency. Get better.

In addition, by installing an exhaust filter, hydraulic unit, and utility piping between the transport boxes, there is no need to place extra equipment on the grating or the floor, making it easier to install and move the glove box, and making it easier to install and move the glove box. Internal maintenance work becomes easier and maintainability is improved.

Furthermore, because the exhaust filter, electrical duct, instrumentation duct, and utility piping that were conventionally located on the top of the glove box are no longer present, the height of the top surface of the glove box is approximately 100 m above the floor where the transport box is installed.
5000mm, approximately 10% lower than before.
It becomes possible to lower the

Additionally, equipment that requires airtightness, such as the one targeted by the present invention, is often required to maintain airtightness even during an earthquake.

Since the force acting during an earthquake is transmitted from the support of the building, the longer the distance between the support and the center of gravity of the equipment or the part with a large mass, the more disadvantageous it becomes.

In the method of the present invention, the transport box is suspended from the floor of the building, and has improved earthquake resistance compared to the case where it is placed on top of a conventional glove box.

[Brief explanation of the drawing]

Fig. 1 is a partial side view of a glove box group according to an embodiment of the present invention, Fig. 2 is a side view of the glove box group, Figs. 3 and 4 are plan views thereof, and Fig. 5 is a conventional example. A front view of a glove box and a transport box, FIG. 6 is a side view of FIG. 5, FIG. 7 is a bird's eye view of a conventional glove box group, and FIG. 8 is a side view of a glove box group of the present invention. , FIG. 9 is a plan view of FIG. 8, FIG. 10 is a plan view of the intersection of the transport box and tunnel, FIG. 11 is a detailed view of the intersection, and FIG. 12 is a sectional view taken along line A-A in FIG. 11. It is. 1...Equipment box, 2...Transportation box, 3
...Grating support pillar, 4...Grating,
5... Connecting pipe, 6... Air supply filter.

Claims (1)

[Scope of Claims] 1. A working airtight glove box installed in each process for treating toxic substances, and a toxic substance connected to the working airtight glove box and treated in the working airtight glove box. an airtight transport box for transporting a substance; and a transport airtight box connected to the plurality of airtight transport boxes and transporting the toxic substance treated in the airtight work glove box between the airtight transport boxes. A group of airtight glove boxes for working for processing toxic substances, comprising a tunnel, and a trolley for transporting the treated toxic substances that moves on the airtight transport boxes and rails provided in the transport tunnel. The airtight transport box is provided below the airtight work glove box, the transport tunnel is connected to the transport airtight box at the same height, and an exhaust filter is provided between the transport airtight boxes. A group of airtight glove boxes for handling toxic substances, characterized by being equipped with a hydraulic unit and utility piping. 2. Claim 1, characterized in that the airtight box for transportation and the tunnel for transportation are provided under the floor where the airtight glove box for work is installed.
A group of airtight work glove boxes for handling the toxic substances listed in Section 1. 3. Work for processing toxic substances as set forth in claim 1 or 2, characterized in that in the transport tunnel, a turntable for changing the course of the trolley is provided in the course changing section. Airtight glove box group.