JPH0240716Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention relates to a door that partitions the outside and the inside of a nuclear silter.

"Conventional example" Conventionally, concrete has been used as a material for the outer walls of nuclear sielters and the doors that partition the inside and outside because it has a certain degree of radiation shielding ability, electromagnetic wave shielding ability, considerable strength, and is inexpensive. It is used as. However, in order to obtain the radiation shielding ability and electromagnetic wave shielding ability required by concrete, it is necessary to form it with a considerably thick wall, which increases the weight and makes the door difficult to operate.
Since the operation of the door cannot be stopped quickly, there is a risk of serious injury if a person gets caught in the door that is about to close.

``Problem that the invention attempts to solve'' This invention was proposed in view of these circumstances, and the problem it seeks to solve is to provide a thin-walled and lightweight nuclear sielter door. .

"Means for Solving the Problems" In order to solve these problems, this invention uses outer and inner plates made of steel plates or iron plates,
A technical means of constructing the door of a nuclear sielter with a lead layer covering the back side of at least one of the outer and inner panels, and a graphite board and heat insulating material inserted in layers between the outer and inner panels. I am teaching.

Here, graphite board is made by mixing graphite with mortar and solidifying it into a plate shape.It is pre-formed into a predetermined shape and is poured in an unsolidified state between an outer plate and an inner plate. It may also be solidified. Further, the graphite board and the heat insulating material may be provided in one layer or in multiple layers.

In a door configured in this way, all radiation is shielded at least twice by lead and graphite boards that have high radiation shielding ability, and the thickness of the lead and graphite boards is adjusted to obtain the required radiation shielding ability. The thickness can be much thinner than conventional concrete doors. Moreover, since all electromagnetic waves are doubly shielded by the outer plate and the inner plate, which have high electromagnetic wave shielding ability, the wall thickness can be made extremely thin to obtain the required electromagnetic wave shielding ability. By inserting a layer of insulation between the outer and inner panels, it is possible to effectively block out the high temperatures during an external explosion and the low temperatures that occur as a result of sunlight being blocked by radioactive clouds. , the temperature inside the nuclear shelter can be easily controlled.

"Embodiment" This invention will be described in detail below based on an illustrated embodiment.

FIG. 1 is a sectional view of an embodiment of this invention.
In the figure, 1 is an inner plate made of a press-formed iron plate, 2 is an outer plate made of a press-formed iron plate, 3 is a lead layer lining the back of the inner plate 1, 4 is an inner layer graphite board, and 5 is glass wool. , or a heat insulating material made of asbestos, and 6 indicates an outer layer graphite board, respectively. The lead layer may be applied along the entire inner peripheral surface. The inner layer graphite board 4, the heat insulating material 5, and the outer layer graphite board 6 are inserted between the inner panel 1 and the outer panel 2 in order from the inside in a layered manner. Alternatively, graphite boards 4 and 6 may be arranged on the inside and outside, and a heat insulating material such as asbestos may be sandwiched in the center of both graphite boards 4 and 6.

In the figure, 7 is the door frame provided inside the periphery of the door, 8 is the hinge provided between the door end and the door frame 7, 9 is the lock provided at the end of the door, and 10 is the door and the door. a sealing member 11 provided for sealing the frame 7;
is a heat insulating member for blocking heat transfer from the door to the door frame 7. The sealing member 10 is made of, for example, neoprene rubber, and is provided on the outside of the door frame 7 over the entire circumference. Further, the heat insulating material 11 is made of, for example, asbestos, and is provided over the entire inner circumference of the peripheral edge of the inner plate 1. 12 is a heat insulating material holding frame that also serves as a sealing frame that is brought into airtight contact with the sealing member 10, and 13 is a sealing member holding frame that also serves as a sealing frame that is brought into airtight contact with the heat insulating material. . or,
14 is a handle provided inside the door and used for locking and unlocking operations.

In this way, the inner plate 1 and outer plate 2 formed of iron plates
In a door equipped with this, external electromagnetic waves can be shielded doubly by the inner plate 1 and the outer plate 2. The electromagnetic wave shielding ability of iron plates is much higher than that of concrete, so the wall thickness of these inner and outer plates 1 and 2 to obtain the required electromagnetic wave shielding ability is much greater than that of concrete, which has the same electromagnetic wave shielding ability. It can be formed into a thin wall. Furthermore, as mentioned above, in a door equipped with the lead layer 3 covering the back surface of the inner panel 1 and the two layers of graphite boards 4 and 6 inserted between the inner panel 1 and the outer panel 2, radioactivity is Triple shielding is provided by a lead layer 3 and two layers of graphite boards 4 and 6. The radiation shielding ability of these lead layers 3 and graphite boards 4 and 6 is much higher than that of concrete, so these lead layers 3 and graphite boards 4 and 6 are required to obtain the required radiation shielding ability. The wall thickness can be made much thinner than when using concrete. In this way, by making the inner panel 1, outer panel 2, lead layer 3, and graphite boards 4 and 6 thinner, the door can be made lighter, improving the operability of the door, and If a part of the human body gets caught in the door, the opening/closing operation of the door can be stopped quickly to prevent serious injury. Furthermore, the heat insulating material 5 can effectively block the heat transfer that occurs between the outside and the inside of the door. The inside of the nuclear shelter can be protected from temperatures as low as several + degrees Celsius.

"Effects" As explained above, the door of the nuclear silter according to this invention can be made much thinner and lighter than conventional concrete doors. As a result, the operability of opening and closing the door is excellent, and it is possible to obtain effects such as being able to prevent serious injuries from occurring when opening and closing the door. In addition, the insulation properties, which are lower than those made of concrete due to thinner walls and the use of metals such as steel plates, iron plates, and lead layers, can be at least compensated for by inserting a heat insulating material between the inner and outer plates. , the temperature inside the nuclear shelter can be controlled more easily than before.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of this invention. 1... Inner plate, 2... Outer plate, 3... Lead layer, 4...
Graphite board, 5...Insulation material, 6...Graphite board.

Claims (1)

[Scope of utility model registration request] An outer plate and an inner plate formed of steel plates or iron plates, a lead layer covering the back side of at least one of the outer plate and the inner plate, and a graphite board and a heat insulating material inserted in a layer between the outer plate and the inner plate. The door of the nuclear sierta.