JP5100548B2 - Airtight structure between airtight equipment and airtight container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable improvement in airtightness and facilitate removal of contamination caused by a contained object. <P>SOLUTION: A glove box side seal member 16, which seals a glove box 10 and a glove box door 11, is formed in a U-shaped cross section, of which the both legs are attached to the glove box door 11, of which the one of the legs is provided closely contactably with the glove box 10, and of which the body is provided closely contactably with a container cap 13. A container side seal member 17, which seals an airtight container 12 and the container cap, is formed in a U-shaped cross section, of which the both legs are attached to the airtight container 12, of which the one of the legs is provided closely contactably with the container cap 13, and of which the body is provided closely contactably with the glove box 10. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an airtight facility and an airtight structure of an airtight container in which an airtight structure between an airtight facility such as a glove box and an airtight container that accommodates an object to be contained in the airtight facility is improved.

  In Patent Document 1, an airtight facility contaminated with a radioactive substance or a substance that causes a problem of diffusion into the environment, and an airtight container that accommodates the substance from the airtight facility as an object to be contained, are described. A technique is disclosed that limits the material of the lip seal (gasket) used in the container and the dimensional accuracy of the hermetic equipment and hermetic container.

In Patent Document 1, as shown in FIG. 11, the opening of the airtight facility 1 is sealed by the facility side door 2 to which the facility side lip seal (gasket) 3 is attached. The opening of the airtight container (container) 4 is sealed by a container lid (container door) 5 through a container side lip seal (gasket) 6 attached to the airtight container 4. Furthermore, when the airtight facility 1 and the airtight container 4 are connected, the container side lip seal 6 seals the airtight facility 1 and the airtight container 4, and the facility side lip seal 3 seals the facility side door 2 and the container lid 5. ing.
JP 2003-294150 A

  When the hermetic container 4 is connected to the hermetic equipment 1 in order to accommodate the objects in the hermetic equipment 1 in the hermetic container 4, as described above, the hermetic container 4, the container lid 5, The airtight facility 1 and the airtight container 4 are sealed, and the facility-side lip seal 3 seals the airtight facility 1 and the equipment-side door 2 and the facility-side door 2 and the container lid 5. It is in a secured state. The equipment side lip seal 3 and the container side lip seal 6 are connected to the airtight equipment 1 and the airtight container 4, and then the equipment side door 2 and the container lid 5 are integrally lifted into the airtight equipment 1. When the inside and the inside of the hermetic container 4 are in communication with each other, the respective tip portions 7 and 8 are contaminated by the objects to be accommodated.

  However, after separating the airtight equipment 1 and the airtight container 4, a smear filter paper (not shown) is attached to the tip of the equipment side lip seal 3 in order to measure the radiation amount (contamination amount) of the equipment side lip seal 3 and the container side lip seal 6. Since the equipment side lip seal 3 and the container side lip seal 6 are formed in an arrow shape in section when pressed against the tip portion 8 of the portion 7 and the container side lip seal 6 and moved within the smear range W, Contaminants enter the back of these lip seals 3 and 6. Contaminants that have entered the back sides of the equipment-side lip seal 3 and the container-side lip seal 6 cannot be easily removed even by using a decontamination cloth or paper. In addition, in FIG. 11, the smear range W about the container side lip seal 6 is shown.

  An object of the present invention is made in consideration of the above-described circumstances, and provides an airtight structure between an airtight facility and an airtight container that can improve airtightness and easily remove contaminants in a contained object. It is in.

The present invention provides an airtight container in which an airtight facility and an equipment side door that closes an opening of the airtight facility are sealed by an equipment side sealing member interposed therebetween, and an object to be accommodated in the airtight facility is accommodated. And a container lid for closing the opening of the hermetic container is sealed by a container-side seal member interposed therebetween, and the container-side seal member and the facility-side seal are connected when the hermetic container and the hermetic equipment are connected. One of the members hermetically seals the hermetic container and the hermetic equipment, and the other is an airtight structure between the hermetic equipment and the hermetic container that hermetically seals the container lid and the equipment-side door. It is formed in a shape, both legs are attached to one of the equipment side door and the airtight equipment, and the one leg is provided in close contact with the other, and the trunk is in close contact with the container lid or the airtight container OK The container-side seal member is formed in a U-shaped cross-section, both leg portions are attached to one of the airtight container and the container lid, and the one leg portion is provided on the other to be in close contact with the other. In addition, the body portion is provided so as to be in close contact with the airtight facility or the facility-side door, and the surface of the body portion of the facility-side seal member and the container-side seal member has a higher side that is contaminated by the object to be contained. It is formed so as to be inclined .

  According to the present invention, the equipment-side seal member attached to one of the equipment-side door and the airtight equipment has a monopod portion in close contact with the other, a trunk portion in close contact with the container lid or the airtight container, and airtightness. The container-side sealing member attached to one of the container and the container lid has a monopod portion in close contact with the other, and a body portion in close contact with the airtight facility or the facility-side door. For this reason, while improving the airtightness of an airtight installation and an equipment side door and the airtightness of an airtight container and a container lid, the airtightness at the time of connection of an airtight installation and an airtight container can also be improved.

  In addition, since both the body part of the equipment-side seal member and the body part of the container-side seal member are flat, even if some of these are contaminated by the objects contained in the airtight equipment, Contaminants can be easily removed.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

[A] First embodiment (FIGS. 1 to 7)
FIG. 1 is a cross-sectional view showing a glove box, an airtight container, and the like showing a first embodiment in an airtight structure between an airtight facility and an airtight container according to the present invention. FIG. 2 is an enlarged cross-sectional view of a portion II in FIG.

  When an object to be stored in the glove box 10 serving as an airtight facility is stored in the airtight container 12, the object to be stored is, for example, a radioactive substance analysis sample or a radioactive waste contaminated with a radioactive substance. In this case, the outer surface of the glove box 10, the outer surface of the glove box door 11 as an equipment-side door that closes the opening 14 of the glove box 10, the outer surface of the airtight container 12, and the container lid that closes the opening 15 of the airtight container 12. It is necessary to consider that the outer surface of 13 is not contaminated by the object to be contained.

  For this purpose, a glove box side seal member 16 as a facility side seal member interposed between the glove box 10 and the glove box door 11 seals the glove box 10 and the glove box door 11, and When connected to the airtight container 12 (FIGS. 3B and 3C; described later), the glove box door 11 and the container lid 13 are sealed, or the glove box 10 and the airtight container 12 are sealed (in this embodiment, The glove box door 11 and the container lid 13 are sealed). Further, a container-side sealing member 17 interposed between the airtight container 12 and the container lid 13 seals the airtight container 12 and the container lid 13, and when the glove box 10 and the airtight container 12 are connected, The airtight container 12 is sealed, or the glove box door 11 and the container lid 13 are sealed (in this embodiment, the glove box 10 and the airtight container 12 are sealed).

  As shown in FIG. 2, the glove box side seal member 16 is formed in a U-shaped cross section in which an outer leg 18 and an inner leg 19 are connected to each other at the trunk 20, and the outer leg 18 and the inner leg 19 is attached to the glove box door 11 or the glove box 10 (in this embodiment, the glove box door 11). That is, the outer leg 18 is formed to have the same dimension as the groove width of the outer annular groove 21 formed in the glove box door 11, and the tip end 18 </ b> A of the outer leg 18 is formed on the bottom surface of the annular groove 21. In a state of contact, the annular groove 21 is tightly inserted and fitted.

  The inner leg 19 is inserted into an inner annular groove 22 formed in the glove box door 11, and a protrusion 19 </ b> B formed on the inner leg 19 is pressed against the inner wall of the annular groove 22. The tip 19A of the inner leg 19 is separated from the bottom surface of the annular groove 22, but the glove box side seal member 16 is pressed by the container lid 13 when the glove box 10 and the hermetic container 12 are connected. It moves to the bottom side of the groove 22. Thus, the inner leg 19 is fitted in the annular groove 22 so as to be movable in the axial direction.

  Further, the glove box side seal member 16 is connected to the outer leg 18 on the glove box 10 side or the glove box door 11 side (the glove box 10 side in the present embodiment) where the glove box side seal member 16 is not mounted. A convex portion 23 is formed. The convex portion 23 is brought into close contact with and engaged with a concave portion 24 formed on the glove box side seal member 16 side of the glove box 10. The engagement between the convex portion 23 of the glove box side seal member 16 and the concave portion 24 of the glove box 10 seals the glove box 10 and the glove box door 11 through the glove box side seal member 16.

  The surface 20A of the trunk portion 20 of the glove box side seal member 16 is formed to be inclined so that the end portion 25 on the glove box 10 side is the highest. After the glove box 10 and the airtight container 12 are connected to the end 25 and the glove box door 11 and the container lid 13 are simultaneously connected (FIG. 3B), the glove box door 11 and the container lid 13 are connected. It is a location that is contaminated by an object to be contained in the glove box 10 when it is integrally lifted into the glove box 10 (FIG. 3C; both will be described later). Due to the inclination of the front surface 20A of the trunk portion 20, the glove box side seal member 16 is in close contact with the container lid 13 or the airtight container 12 (the container lid 13 in the present embodiment) when the glove box door 11 and the container lid 13 are connected. Then, the glove box door 11 and the container lid 13 are sealed by the glove box side seal member 16.

  The container side sealing member 17 is also configured in the same manner as the above-described glove box side sealing member 16. In other words, the container-side seal member 17 is formed in a U-shaped cross section in which the outer leg portion 26 and the inner leg portion 27 are connected to each other at the trunk portion 28, and the outer leg portion 26 and the inner leg portion 27 are formed in the airtight container 12. Alternatively, it is attached to the container lid 13 (the airtight container 12 in the present embodiment). The inner leg 27 is formed to have the same dimension as the groove width of the inner annular groove 30 formed in the hermetic container 12, and the tip 27 </ b> A of the inner leg 27 is in contact with the bottom surface of the annular groove 30. Then, it is inserted into the annular groove 30 closely and fitted.

  The outer leg 26 is inserted into an outer annular groove 29 formed in the hermetic container 12, and a protrusion 26 </ b> B formed on the outer leg 26 is pressed against the inner wall of the annular groove 29. The front end portion 26A of the outer leg portion 26 is separated from the bottom surface of the annular groove 29, but the container-side seal member 17 is pressed by the glove box 10 when the glove box 10 and the airtight container 12 are connected. 29 moves to the bottom side. Thus, the outer leg portion 26 is fitted in the annular groove 29 so as to be movable in the axial direction.

  Further, the container-side seal member 17 has a convex portion 31 on the inner leg 27 on the container lid 13 side or the airtight container 12 side (the container lid 13 side in the present embodiment) where the container-side seal member 17 is not mounted. It is formed. The convex portion 31 is in close contact with and engaged with a concave portion 32 formed on the container-side seal member 17 side of the container lid 13. The airtight container 12 and the container lid 13 are hermetically sealed via the container side sealing member 17 by the engagement between the convex portion 31 of the container side sealing member 17 and the concave portion 32 of the container lid 13.

  The surface 28A of the body portion 28 of the container side sealing member 17 is formed so as to be inclined so that the end portion 33 on the container lid 13 side becomes the highest. When the glove box 10 and the airtight container 12 are connected (FIG. 3 (B)), the end 33 is pulled up into the glove box 10 together with the glove box door 11 and the container lid 13. (FIG. 3 (C); later described), this is a place contaminated by an object to be contained in the glove box 10. Due to the above-described inclination on the surface 28A of the trunk portion 28, the container-side seal member 17 is in close contact with the glove box 10 or the glove box door 11 (the glove box 10 in the present embodiment) when the glove box 10 and the airtight container 12 are connected. The glove box 10 and the airtight container 12 are sealed by the container side sealing member 17.

  In a state where the glove box 10 is sealed by the glove box door 11 via the glove box side seal member 16 attached to the glove box door 11, the surface 20A of the trunk portion 20 of the glove box side seal member 16, the glove box 10 The surface 10A of the glove box door 11 and the surface 11A of the glove box door 11 are set to a lower height in this order, and the surface 20A of the trunk portion 20 of the glove box side seal member 16 is set to the highest. When the airtight container 12 is sealed by the container lid 13 via the container side sealing member 17 attached to the airtight container 12, the surface 28A of the trunk portion 28 of the container side sealing member 17 and the container lid 13 The height is set to be lower in the order of the surface 13A and the surface 12A of the airtight container 12, and the surface 28A of the trunk portion 28 of the container-side seal member 17 is set to be the highest.

  As a result, when the glove box 10 and the airtight container 12 are connected, the trunk portion 20 of the glove box side sealing member 16 is reliably pressed by the surface 13A of the container lid 13, and further, the trunk portion 28 of the container side sealing member 17 is used. Is reliably pressed by the surface 10 </ b> A of the glove box 10.

  In the state where the glove box 10 is sealed by the glove box door 11 via the glove box side seal member 16 and the airtight container 12 is sealed by the container lid 13 via the container side seal member 17, the glove box side seal member is used. The difference between the outer diameter A of 16 and the outer diameter B of the container lid 13 is set in a range of 0 mm to 1.0 mm. This is realized by designing the dimensional accuracy during assembly of the glove box 10, the glove box door 11, the airtight container 12 and the container lid 13 with a tolerance of ± 0.5 mm. By setting the difference between the outer diameters A and B in the above-described range, a region where the end portion 25 of the trunk portion 20 of the glove box side seal member 16 is not in contact with the container lid 13 (that is, a contamination width described later), In addition, the region where the end portion 33 of the body portion 28 of the container-side seal member 17 is not in contact with the glove box 10 (also the contamination width) is minimized.

  The above-mentioned glove box side sealing member 16 and container side sealing member 17 are made of chlorosulfonated polyethylene excellent in radiation resistance, wear resistance, weather resistance and gas permeability. FIG. 4 shows physical properties and the like of acrylic rubber, nitrile rubber, ethylene propylene rubber, and chlorosulfonated polyethylene. According to FIG. 4, chlorosulfonated polyethylene has the same degree of radiation resistance and the same or better wear resistance and weather resistance than acrylic rubber, nitrile rubber and ethylene propylene rubber. However, it can be evaluated that the gas permeability that is most necessary for the sealing member is the best.

  Accordingly, in the present embodiment, chlorosulfonated polyethylene is adopted as the material of the glove box side sealing member 16 and the container side sealing member 17, but acrylic rubber, nitrile rubber, or ethylene propylene rubber may be used. In addition, as a material for the glove box side sealing member 16 and the container side sealing member 17, styrene butadiene (SBR) or hydrogenated nitrile (HNBR) having excellent radiation resistance may be used.

  The above-mentioned glove box side sealing member 16 and container side sealing member 17 have a hardness set in the range of 40 to 80, and operating torque, particularly operating torque when the glove box 10 and the airtight container 12 are connected and disconnected. In addition, inadvertent deformation of the glove box side seal member 16 and the container side seal member 17 is prevented.

  That is, as shown in FIGS. 1 and 2, the fitting claw 34 of the glove box door 11 is fitted into the fitting groove 35 of the glove box 10, and the glove box 10 and the glove box 10 are interposed via the glove box side seal member 16. When the box door 11 is sealed, or the fitting claw 36 of the hermetic container 12 is fitted into the fitting groove 37 of the container lid 13 so that the hermetic container 12 and the container lid 13 are connected via the container-side seal member 17. In the case of sealing, since there is one seal member 16 and 17 each, the operating torque when the hardness of the glove box side seal member 16 and the container side seal member 17 is in the above range is 10 to 20 Nm. It will be about.

  In contrast, as shown in FIGS. 1, 3 (B) and 3 (C), in order to connect the airtight container 12 to the glove box 10, the fitting claw 38 of the container lid 13 is fitted to the glove box door 11. When the fitting operation is performed in the groove 39 (step 1) and the fitting claw 40 of the glove box 10 is fitted into the fitting groove 41 of the airtight container 12 (step 2), the trunk portion 20 of the glove box side seal member 16 is used. Since the end portion 25 of the container and the end portion 33 of the body portion 28 of the container-side seal member 17 are in contact with each other, the frictional force generated at this time increases both the operation torques in step 1 and step 2. Even when the airtight container 12 is separated from the glove box 10 from the state shown in FIG. 3B to the state shown in FIG. 3A (step 3), the end 25 of the trunk portion 20 of the glove box side seal member 16 is used. And the end portion 33 of the body portion 28 of the container-side seal member 17 come into contact with each other, and the operation torque at this time increases.

  For example, as shown in FIG. 5, when the hardness of the container-side seal member 17 is 65 and the hardness of the glove box-side seal member 16 is 45, 65, 80, the step 1 is performed in any combination of hardnesses. Each operation torque in 2, 3 is in the range of 30 to 100 Nm. Since the operation torque 100N-m can be evaluated as a torque value that can be manually operated using a tool, the hardness of the glove box side seal member 16 and the container side seal member 17 is 80 or less, so that the glove box 10 and the airtight container The operating torque at the time of connection or disconnection with the power supply 12 is reduced to a range that can be operated by human power.

  In FIG. 5, the operating torque when the hardness of the container-side seal member 17 is 65 and the hardness of the glove box-side seal member 16 is 45 is indicated by a solid line α, the hardness of the container-side seal member 17 is 65, The operation torque when the hardness of the box-side seal member 16 is 65 is indicated by a solid line β, and the operation torque when the hardness of the container-side seal member 17 is 65 and the hardness of the glove box-side seal member 16 is 80 is indicated by a solid line γ. Show.

  In addition, since the hardness of the glove box side seal member 16 and the container side seal member 17 is set to 40 or more, inadvertent deformation of the glove box side seal member 16 and the container side seal member 17 is prevented, and the glove by this Omission from the box door 11 and the airtight container 12 is avoided.

  Next, a procedure for connecting and disconnecting the glove box 10 and the airtight container 12 will be described with reference to FIG.

  When the glove box 10 and the airtight container 12 are separated from each other as shown in FIG. 3A, the glovebox 10 is sealed by the glovebox door 11 via the glovebox side seal member 16, and the airtight container 12 is sealed by the containerside seal. It is sealed by a container lid 13 via a member 17. From this state, the fitting claw 38 of the container lid 13 is fitted into the fitting groove 39 of the glove box door 11, and the fitting claw 40 of the glove box 10 is fitted to the fitting groove 41 of the airtight container 12, As shown in FIG. 3B, the airtight container 12 is connected to the glove box 10.

  In the state shown in FIG. 3B, the glove box 10 and the glove box door 11 are sealed and kept in an airtight state by the glove box side seal member 16, and the glove box door 11 and the container lid 13 are also sealed. Thus, the space M surrounded by the glove box door 11 and the container lid 13 is also kept airtight. Further, the container lid 13 and the airtight container 12 are sealed and kept airtight by the container side sealing member 17, and the glove box 10 and the airtight container 12 are also sealed and kept airtight.

  The glove box door 11 and the container lid 13 are integrally lifted from the state shown in FIG. 3 (B) to bring the inside of the glove box 10 and the inside of the airtight container 12 into communication as shown in FIG. 3 (C). Also at this time, the space M surrounded by the glove box door 11 and the container lid 13 is airtightly held by the glovebox side sealing member 16, and the glovebox 10 and the airtight container 12 are also airtightly held by the container side sealing member 17. . In the state where the glove box door 11 and the container lid 13 are pulled up, the objects in the glove box 10 are transferred into the airtight container 12 and stored.

  After the objects to be stored in the airtight container 12, the glove box door 11 and the container lid 13 are integrally lowered, and the glove box 10 is sealed by the glove box door 11 as shown in FIG. The airtight container 12 is sealed with the lid 13. After that, as shown in FIG. 3A, the fitting claw 40 of the glove box 10 and the fitting groove 41 of the airtight container 12 are released from the fitting, and the fitting claw 38 of the container lid 13 and the glove box door 11 are released. The fitting groove 39 is released and the airtight container 12 is pulled away from the glove box 10.

  Therefore, according to the present embodiment, the following effects (1) to (6) are obtained.

  (1) The glove box side seal member 16 attached to the glove box door 11 has the convex portion 23 of the outer leg 18 in close contact with the concave portion 24 of the glove box 10 so that the glove box 10 and the glove box are engaged. When the glove box 10 and the airtight container 12 are connected to each other, the inclined surface 20A of the trunk portion 20 is in close contact with the surface 13A of the container lid 13 so that the glove box door 11 and the container lid 13 To seal. Further, the container-side seal member 17 attached to the airtight container 12 has the convex portion 31 of the inner leg portion 27 in close contact with the concave portion 32 of the container lid 13 so that the hermetic container 12 and the container lid 13 are connected. The glove box 10 and the airtight container 12 are hermetically sealed when the inclined surface 28A of the trunk portion 28 is in close contact with the surface 10A of the glove box 10 when the glove box 10 and the airtight container 12 are connected. Accordingly, the airtightness between the glovebox 10 and the glovebox door 11 and the airtightness between the airtight container 12 and the container lid 13 can be improved, and the airtightness when the glovebox 12 and the airtight container 12 are connected is also improved. Can be made.

  (2) The outer surfaces of the glove box 10, the glove box door 11 and the glove box side seal member 16 and the outer surfaces of the airtight container 12, the container lid 13 and the container side seal member 17 are shown in FIG. When the glove box door 11 and the container lid 13 are pulled up together when the glove box 10 and the airtight container 12 shown are connected, the space M surrounded by the glove box door 11 and the container lid 13 is a glove box side sealing member. 16, and the glove box 10 and the airtight container 12 are held in an airtight state by the container side seal member 17, so that the end 25 of the trunk portion 20 of the glove box side seal member 16 and the container side seal are sealed. Except for the end portion 33 of the body portion 28 of the member 17, the objects contained in the glove box 10 may be contaminated. No.

  When the glove box 10 and the airtight container 12 are separated (FIG. 3A), the end 25 of the body 20 of the glove box-side seal member 16 and the body 28 of the container-side seal member 17 contaminated by the object to be stored. The smear filter paper (not shown) is pressed against the end portion 33 of the base plate and moved in the smear range X shown in FIG. 2, so that the amount of radioactivity of the glove box side seal member 16 and the container side seal member 17 can be increased using the smear filter paper. Measured. At this time, since the barrel portion 20 of the glove box side seal member 16 and the barrel portion 28 of the container side seal member 17 are flat, it is possible to prevent the smear filter paper from being torn. The smear range X indicates the case of the container side seal member 17.

  Further, when the smear filter paper is moved, even if the contamination spreads on the surface 20A of the trunk portion 20 of the glove box side seal member 16 and the surface 28A of the barrel portion 28 of the container side seal member 17, the glove box side seal member Since the 16 barrel portions 20 and the barrel portion 28 of the container-side seal member 17 have a flat shape, the expanded contamination does not go around to the back sides of the barrel portions 20 and 28. As a result, the spread contamination can be easily wiped off with a decontamination cloth or paper. Therefore, application to automation by an automatic smear robot or the like is also possible.

  (3) In the state where the glove box 10 is sealed by the glove box door 11 via the glove box side seal member 16 and the airtight container 12 is sealed by the container lid 13 via the container side seal member 17, the glove box side seal The height of the surface 20A of the body 20 of the member 16, the surface 10A of the glove box 10, and the surface 11A of the glove box door 11 are set to be lower in order, and the surface 28A of the body 28 of the container side seal member 17 The height is set to be lower in the order of the surface 13A of 13 and the surface 12A of the airtight container 12. Furthermore, in the above-described state, the dimensional accuracy during assembly of the glove box 10, the glove box door 11, the airtight container 12 and the container lid 13 is set to ± 0.5 mm or less, and the outer shape A of the glove box side seal member 16 is The difference from the outer shape B of the container lid 13 is set in a range of 0 mm or more and 1.0 mm or less. As a result, when the glove box 10 and the airtight container 12 are connected, the leakage rates of the glovebox 10 and the airtight container 12 are calculated as follows. It can be reduced as in the case.

  For example, when the dimensional accuracy at the time of assembling the glove box 10, the glove box door 11, the airtight container 12 and the container lid 13 is ± 0.5 mm or less, the leak rate is calculated by the calculation formula of JIS Z4820 “Glovebox airtight test method”. The results are shown in FIG. The leak rate P between the glove box 10 and the airtight container 12 (container + GB) is the leak rate Q between the airtight container 12 and the container lid 13 (container + container lid), and the glove box 10 and the glove box door 11 (GB). The leak rate R of. + GBB door) is 0.1 vol% or less, and the standard required for the glove box is sufficiently satisfied.

  (4) The glove box side seal in a state where the glove box 10 is sealed by the glove box door 11 via the glove box side seal member 16 and the airtight container 12 is sealed by the container lid 13 via the container side seal member 17. The difference between the outer shape A of the member 16 and the outer shape B of the container lid 13 is set in a range of 0 mm or more and 1.0 mm or less. As a result, the contamination width and the contamination area at each of the end portion 25 of the body portion 20 of the glove box side seal member 16 and the end portion 33 of the body portion 28 of the container side seal member 17 can be reduced.

  For example, when the object to be contained is a simulated contaminant such as a fluorescent powder instead of a radioactive substance, the result of comparing the contamination width and the contamination area of the seal member for each of the present embodiment and the conventional (background) technology As shown in FIG. When the connection state of FIG. 3C is changed to the disconnection state of FIG. 3A, the contamination width and the contamination area of the glove box side seal member 16 and the container side seal member 17 of the present embodiment are the same as those of the conventional equipment. The lip seal 3 and the container side lip seal 6 (both in FIG. 11) are reduced to about half.

  This is because the conventional equipment side lip seal 3 and the container side lip seal 6 are in a cantilever state, and when the airtight container 4 is connected to the airtight equipment 1, the equipment side lip seal 3 and the container side lip seal 6 come into contact with each other. Therefore, it is considered that the amount of contamination is increased because they are pulled out by the action of the frictional force. On the other hand, in this embodiment, the glove box side seal member 16 and the container side seal member 17 are in a state where both ends are supported, and the difference between the outer shape A of the glove box side seal member 16 and the outer shape B of the container lid 13. Is set in the above-mentioned range, it is not pulled out and the amount of contamination is reduced.

  (5) Since the glove box side sealing member 16 and the container side sealing member 17 are made of chlorosulfonated polyethylene having excellent radiation resistance, wear resistance, weather resistance and gas permeability, deterioration due to radioactivity is suppressed. Further, since the cutting damage due to the operation is also reduced, the glove box side seal member 16 and the container side seal member 17 can be used stably over a long period of time.

  (6) Since the hardness of the glove box side sealing member 16 and the container side sealing member 17 is set in the range of 40 to 80, the hardness is not set to an excessive value (value exceeding 80). The operation torque at the time of connection or disconnection with the container 12 can be reduced to a manually operable range (for example, 100 N-m or less). Moreover, since the hardness of the glove box side seal member 16 and the container side seal member 17 is not excessively low (less than 40), the glove box side seal member 16 and the container side seal member 17 can be prevented from being deformed, and the glove box door 11 , Dropping off from the airtight container 12 can be avoided in advance.

[B] Second embodiment (FIGS. 8 to 10)
FIG. 8 is a cross-sectional view showing an airtight container according to a second embodiment in an airtight structure between the airtight equipment and the airtight container according to the present invention. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description is simplified or omitted.

  The airtight structure of the airtight facility / airtight container of the present embodiment is different from that of the first embodiment in that at least one of the container lid 13 and the airtight container 12 (the container lid 13 in the present embodiment) A welding groove 50 for welding the airtight container 12 and the container lid 13 is formed after the side seal member 17 is removed, and a space above the welding groove 50 becomes a concave portion 32, and the concave portion 32 has a container side. That is, the convex portion 31 of the seal member 17 is brought into close contact with and engaged.

  That is, the hermetic container 12 in which the object to be accommodated (for example, radioactive waste) is accommodated is initially inserted through the container-side seal member 17 mounted in the annular grooves 29 and 30 of the hermetic container 12 as shown in FIG. It is sealed with a container lid 13. In this state, the weld groove 50 formed on the side wall surface of the hermetic container 12 of the container lid 13 contacts the hermetic container 12, and the convex part 31 of the container-side seal member 17 is in close contact with the concave part 32 above the weld groove 50. The airtight container 12 is held in an airtight state by the container lid 13 and the container side sealing member 17.

  The container side sealing member 17 is pulled out from the state of FIG. 8 using a tool or a jig (FIG. 9), and then the welding groove 50 of the container lid 13 and the airtight container 12 are welded. By this welding, the airtight container 12 is again kept airtight by the container lid 13. The code | symbol 51 in FIG. 10 shows the welding part of the welding groove | channel 50 and the airtight container 12. FIG.

  Therefore, according to the present embodiment, in addition to the same effects (1) to (6) as in the first embodiment, the following effect (7) is achieved.

  (7) Generally, when the hermetic container 12 and the container lid 13 containing the objects to be contained such as radioactive waste are buried and disposed of, the container-side seal member 17 which is an organic substance is decomposed by long-term embedding or this decomposition. The use of organic substances is prohibited because the gas generated by the gas has an adverse effect on the burial site. In the present embodiment, when the hermetic container 12 and the container lid 13 in which objects such as radioactive waste are accommodated are disposed of, the container-side seal member 17 is removed, and the hermetic container 12 is welded using the welding groove 50. Since the container 12 and the container lid 13 are held in an airtight state and are disposed and buried, it is possible to prevent the above-described adverse effects from being exerted on the welding site.

  As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this. For example, in the above-described embodiments, the case where the object to be contained is a radioactive substance or a substance contaminated by the radioactive substance has been described. However, a substance (for example, bacteria) that should be prevented from spreading to the environment is contained. The present invention can also be applied to such cases.

Sectional drawing which shows the glove box, the airtight container, etc. which show 1st Embodiment in the airtight structure between the airtight equipment and the airtight container which concern on this invention. The II section expanded sectional view of FIG. (A)-(C) is explanatory drawing which each shows the connection procedure of the glove box of FIG. 1, and an airtight container, etc. FIG. FIG. 2 is a chart showing a comparison of physical properties and the like of the sealing member of FIG. The graph which shows the relationship between the hardness of the sealing member of FIG. 1, and operation torque. The graph which shows the leak rate of the glove box of FIG. 1, an airtight container, etc. FIG. 12 is a chart showing a comparison of the contamination width and the like by the seal members of FIG. 1 and FIG. 11. Sectional drawing which shows the airtight container of 2nd Embodiment in the airtight structure between the airtight installation and the airtight container which concerns on this invention. Sectional drawing which shows the state which removed the container side sealing member from the airtight container of FIG. Sectional drawing which shows the welding state of the airtight container of FIG. Sectional drawing which shows the airtight structure between the conventional glove box and an airtight container.

Explanation of symbols

10 Glove box (airtight equipment)
11 Glove box door (equipment side door)
12 airtight container 13 container lid 14, 15 opening 16 glove box side sealing member (facility side sealing member)
17 container side seal member 18 outer leg 19 inner leg 20 trunk 23 convex 24 concave 25 end 26 outer leg 27 inner leg 28 trunk 31 convex 32 concave 33 end 50 welding groove 51 weld A Outer diameter of glove box side seal member B Outer diameter of container lid

Claims (7)

A hermetic facility and a facility-side door that closes the opening of the hermetic facility are hermetically sealed by a facility-side seal member interposed therebetween, and an hermetic container that accommodates an object to be contained in the hermetic facility, and this hermetic seal The container lid that closes the opening of the container is hermetically sealed by a container-side seal member interposed therebetween,
At the time of connection between the hermetic container and the hermetic equipment, one of the container-side sealing member and the equipment-side sealing member seals the hermetic container and the hermetic equipment, and the other seals the container lid and the equipment-side door. In the airtight structure between airtight equipment and airtight containers to be sealed,
The equipment-side seal member is formed in a U-shaped cross section, both legs are attached to one of the equipment-side door and the airtight equipment, and the one leg is provided in close contact with the other. Provided in close contact with the container lid or the airtight container,
The container-side seal member is formed in a U-shaped cross-section, both legs are attached to one of the airtight container and the container lid, and the one leg is provided in close contact with the other, and the trunk Is provided in close contact with the airtight facility or the facility-side door ,
The body surface of each of the equipment-side seal member and the container-side seal member is formed so as to be inclined so that the side contaminated by the object to be contained is raised. Airtight structure. The one leg portion of the equipment side seal member is formed with a convex portion that engages with the concave portion formed in the airtight equipment or the equipment side door, and the one leg portion of the container side seal member has a container lid or an airtight container. The airtight structure between the airtight facility and the airtight container according to claim 1, wherein a convex portion that engages with the concave portion formed in the airtight facility is formed. 2. The airtight structure between an airtight facility and an airtight container according to claim 1, wherein the facility side seal member and the container side seal member are made of chlorosulfonated polyethylene. 2. The airtight structure between an airtight facility and an airtight container according to claim 1, wherein the equipment side seal member and the container side seal member have a JIS type A hardness set in a range of 40 to 80. 3. The airtight equipment is sealed by the equipment side door via a equipment side seal member attached to the equipment side door, and the airtight container is sealed by a container lid via a container side seal member attached to the airtight container. In the state, the height of the trunk side of the equipment side seal member, the airtight equipment surface, the equipment side door surface is set in order of decreasing height, and the trunk side surface of the container side seal member, the container lid surface, The airtight structure between the airtight facility and the airtight container according to claim 1, wherein the height is set to be lower in the order of the surface of the airtight container. The airtight equipment is sealed by the equipment side door via a equipment side seal member attached to the equipment side door, and the airtight container is sealed by a container lid via a container side seal member attached to the airtight container. 2. The airtight facility / airtight according to claim 1, wherein a difference between an outer diameter of the equipment-side seal member and an outer diameter of the container lid is set to 0 mm or more and 1.0 mm or less. Airtight structure between containers. The welding lid for welding the airtight container and the container lid after removing the container-side sealing member is formed in at least one of the container lid and the airtight container. Airtight structure between airtight equipment and airtight container.

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