JP2001221891A - Emergency building isolation equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an emergency building isolation equipment, capable of instantaneously isolating a nuclear material using facility from the environment during the occurrence of accidents which discharge radioactive materials and radiation, and preventing or reducing the diacharge of the radioactive materials and radiation to the environment and containing without occupying a large space, when it not used. SOLUTION: The emergency building isolation equipment has an expandable structure folded in layers, a shielding body capable of covering the upside of the building, in expanded state, a shield body expanding means for expanding the shielding body from folded state to expanded state using gas pressure generated by combustion of gunpowder and a shielding body guiding means for guiding the expanding shielding body in the upward direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency shutdown facility for a building, and more particularly, to an accident or the like in a facility using nuclear materials such as a nuclear power plant and a nuclear fuel chemical processing facility, or a facility such as a factory. The present invention relates to a building emergency shutdown facility that immediately covers a facility when the occurrence of a fire, and promptly prevents or reduces the release of radioactive products, radiation, or harmful substances from the facility to the external environment.

[0002]

2. Description of the Related Art Nuclear power plants, nuclear fuel chemical processing facilities, and radioactive waste storage facilities and other facilities that use nuclear materials are required to prevent accidents from occurring, prevent accidents from spreading, and prevent abnormal release of radioactive materials. Safety measures are required. For example, even if an abnormal condition occurs, it is necessary to provide a design with sufficient margin so that it does not reach a certain assumed level, implement construction and strict operation management, etc., and provide an early detection system and safety protection for abnormal conditions. Installation of equipment is required.

However, it is a fact that not all existing nuclear material-using facilities have taken all possible safety measures assuming an accident including a severe event. Accidents are occurring one after another.
That is, fires due to mechanical errors, human errors and natural phenomena, mechanical damage or destruction of structures important for safety such as nuclear material containers, or criticality accidents, etc. occur at the current facilities using nuclear materials. There is a possibility that. further,
If the spread of these accidents cannot be prevented, the accumulation of reaction energy exceeds the capacity of the building, eventually destroying the building of the facility that uses nuclear materials, and causing radioactive material and radiation to be lost at the facility that uses nuclear materials. May be released to the outside. Radiation such as γ-rays and neutrons has a high penetrating power, so if there is no effective shielding material, the radiation may be released to the external environment even if the building of the substance use facility is not destroyed. There is.

[0004] In order to prevent damage to the external environment in the event of an accident, the building of the facility using nuclear materials must have a strong structure that will not be destroyed in the event of any accident. Most preferably, the building is covered with a shielding material capable of completely blocking radiation.

However, for existing nuclear material-using facilities,
It is not realistic to carry out renovation to satisfy the above requirements, because the facilities must be stopped during the renovation period and enormous costs are required. Therefore, in existing nuclear material-using facilities, facilities that can block radioactive materials and radiation in the event of a radioactive material and radiation release accident shall be installed without renovating the nuclear material-using facilities themselves. Is preferred.

[0006] However, there is no equipment that satisfies such conditions at present. Therefore, once an accident involving the release of radioactive materials or radiation occurs at a facility currently using nuclear materials, it is not possible to effectively block the release of radioactive materials or radiation to the external environment, and the damage caused by the accident will not increase. Inevitable.

[0007]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, that is, when an accident such as a radioactive substance or a radiation emission accident occurs at a facility using nuclear materials, the facility is immediately covered, and the radioactive substance and radiation are removed. It is an object of the present invention to provide a building emergency shut-off device which can prevent or reduce the emission of the building into the external environment and can be compactly stored when not in use.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a shielding body having a stretchable structure folded in a laminate and capable of covering an upper part of a building in an extended state. And a shield extending means for extending the shield in the folded state, and the shield extending by the action of the shield extending means in a direction in which the shield covers a building. This is a building emergency shutoff facility characterized by having a shield guiding means, and has a stretchable structure folded in a stack, and can cover the upper part of the nuclear material use facility in an extended state. Body, using gas pressure generated by the combustion of the explosive, shield extending means for making the shield from a contracted state to an extended state,
A building emergency shut-off facility comprising: a shield guiding unit that guides the shield that extends by the action of the shield extending unit in a direction in which the shield covers the building. A shield capable of covering the upper part of the building in an extended state with a bellows structure, and installed in an internal space formed by the shield, utilizing gas pressure generated by combustion of explosives, Shield extending means for bringing the shield from a contracted state to an extended state, and shield guiding means for guiding the shield, which is extended by the action of the shield extending means, in a direction in which the shield covers a building. It is a building emergency shutdown facility characterized by having, as one aspect of the building emergency shutdown facility, the shield,
As another embodiment of the building emergency shut-off facility, which is provided with a radiation shielding material, the building is a nuclear material use facility.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A building emergency shutoff facility according to the present invention includes a shield, shield extending means, and shield guiding means.

[0010] The shield is extendable and contractable, and has a function of covering the upper part of the target building in an extended state, and preventing radioactive material and the like from being released from the nuclear material use facility to the outside environment.

[0011] The shield has a stretchable structure which is folded in a laminated manner. Specific examples of the expandable and contractible structure folded in a stack shape include, for example, a plate-like body connection structure, a flexible member connection structure, and a bellows structure.

[0012] The plate-like body connection structure is a structure in which a plurality of plate-like bodies are arranged in a fixed direction, and each of the plate-like bodies is connected to an adjacent plate-like body at an angle so as to form a pleated shape as a whole. Structure. In this structure, the shield expands and contracts by increasing or decreasing the angle between each plate-like body and the adjacent plate state.

The adoption of the plate-like body connection structure makes it possible to strengthen the structure of the shielding body, and it is difficult for breakage or the like to occur even when a scattered object from the target building hits. By suitably selecting the material of the shape, it is preferable in that the radiation can be shielded.

The shape of the plate-like body is not particularly limited as long as the shield can be extended and contracted as described above, and examples thereof include a rectangle and the like.

The size of the plate-like body is appropriately determined depending on the size of the target building. In addition, the thickness of the plate-like body is more advantageous for shielding radiation, etc., but if it is too large, the weight of the plate-like body increases, and the energy required to extend the shield becomes excessive. Therefore, it is determined by the relationship between the shielding ability required for the shield and the energy required to extend the shield, and the like.

The material of the plate is not particularly limited as long as the object of the present invention can be achieved. For example, metal, synthetic resin, concrete, wood,
And materials obtained by combining them.

If a radiation shielding material is used as the material of the plate, the shielding body can be provided with a radiation shielding ability. For example, if a material containing a γ-ray absorbing element such as lead, iron, and tungsten is used for the plate-like body, the shielding ability against γ-rays can be given to the shield. Further, if a material containing a neutron absorbing element such as boron, cadmium, and hafnium is used, a shielding ability against neutron rays can be imparted to the shielding material, and further, the neutron absorbing element and water, heavy water, and graphite are used. In combination with neutron moderators such as beryllium, concrete, synthetic resin, and wood,
Alternatively, if used in combination, shielding against neutron radiation becomes more effective. The combination of the γ ray absorbing element and the neutron ray absorbing element, and the combination of the γ ray absorbing element, the neutron ray absorbing element and the neutron moderator, the shielding ability against both γ ray and neutron ray. It can also be applied to a shielding material.

Further, the plate-like body may have a hollow structure. When the plate-like body has a hollow structure, the plate-like body becomes light in weight, and the energy required for extending the shield can be reduced. After connecting the hollow portions of the respective plate-shaped bodies by connecting them, and extending the shield to cover the target building with the shield, boric acid water or the like is sequentially injected into the hollow portions of the connected plate-shaped bodies. By doing so, it is possible to impart neutron shielding capability to the shield after the shield has been extended.

The number of the plate-like bodies is not particularly limited, and can be appropriately determined as long as the length of the shield when the shield extends is long enough to cover the target building.

As a method of connecting the plate-like members, an angle between adjacent plate-like members is arbitrarily changed so that the fold-like structure can expand and contract, and a predetermined mechanical strength is provided. There is no particular limitation as long as the conditions such as are satisfied, for example, a method of connecting with a hinge or the like, and providing a notch portion that can be engaged with each other at a connecting point on each plate-like body, so that each plate-like body is engaged Then, a method of joining by passing a pin through the engaging portion from the side direction can be cited.

Further, in order to completely eliminate the gap generated at the joint between the plate-like bodies, it is possible to cover the entire surface of the shield with a continuous thin sheet.

The flexible member connecting structure comprises a plurality of skeletal members continuously arranged in a predetermined direction, and a sheet-like flexible member connecting the adjacent skeletal members. Say. In this structure, the distance between the adjacent skeletal members expands and contracts, and the sheet-like flexible member relaxes accordingly, whereby the shield expands and contracts.

When the flexible member connection structure is employed, the weight of the shield can be reduced, so that the energy required to extend the shield can be reduced.
This is advantageous in that the storage space for the shield can be reduced.

The shape of the skeletal member is not particularly limited as long as the shield can be expanded and contracted as described above, and examples thereof include a plate shape, a column shape, and a prism shape. Further, the shape of the skeleton member may be a shape obtained by forming a plate, a column, or a prism into a rectangular, U-shaped, or U-shaped planar shape, or the like. .

The size of the skeletal member is appropriately determined according to the size of the target building. For example, in the case of the U-shaped or U-shaped skeletal member, when the shield formed using the skeletal member is extended, the target building is placed in a space surrounded on three sides by the shield. When the size of the skeletal member is determined so that objects are stored, the entire target building can be covered with the shield.

The material of the skeletal member is not particularly limited as long as the object of the present invention can be achieved, and the same material as the plate-like body can be used.

The number of the skeletal members is determined appropriately according to the size of the target building so that the target building can be covered when the shield extends.

The sheet-like flexible member can be relaxed as the distance between the respective frame members expands and contracts, and if it has a predetermined strength, its size, thickness, material, etc. are particularly limited. However, it can be determined appropriately according to the purpose. For example, the size of the sheet-like flexible member is determined such that the length when the shield is extended is long enough to cover the target building. Examples of the material include a synthetic resin.

The sheet-like flexible member may be formed from one sheet, or may be formed from two or more sheets.

Further, the sheet-like flexible members are doubly arranged between the respective frame members, and a sealed space is formed between the doubly-arranged sheet-like flexible members. Can be. With such a structure, when the shield is in a contracted state, the space is evacuated to reduce the weight of the shield, and the energy required to extend the shield can be reduced. There is an advantage that after the elongate and cover the target building, water or boric acid water or the like can be injected into the space to provide the shielding body with radiation shielding ability.

The bellows structure includes, for example, a plurality of annular skeleton members and an annular flexible member for connecting the adjacent annular skeleton members to each other. And a structure formed by being connected by an elastic member. In this structure, the distance between the adjacent annular skeleton members expands and contracts, and the sheet-like flexible member relaxes accordingly, whereby the shield expands and contracts.

The use of the bellows structure is preferable in that the target building can be double-covered, the shielding effect is improved, and the shield can be easily extended as described later.

The planar shape of the annular skeleton member is not particularly limited as long as the shield can be extended and contracted as described above, and examples thereof include a rectangular shape, an elliptical shape, a U-shape, and a U-shape. Can be mentioned.

The material of the annular skeleton member is not particularly limited as long as the object of the present invention can be achieved, and the same material as the plate-like body can be used.

The number of the annular skeleton members is appropriately determined according to the size of the target building so that the target building can be covered when the shield extends.

The annular flexible member can be the same as the sheet-like flexible member except that it is annular in shape. For example, the size, thickness, material, etc., of the sheet-like flexible member are different. It can be determined in the same manner as the sex member.

The shield completely covers the target building,
If the target building can be completely isolated from the external environment, it is preferable in that the flying objects from the target building can be completely blocked, and if the material of the blocker is appropriately selected, radiation can be reduced. It is preferable in that it can be shielded. However, even if the shield does not completely cover the target building, the object of the present invention can be achieved as long as it can effectively block flying objects and the like to be processed.

The shield used in the building emergency shutoff system of the present invention may be one body, or two or more bodies. As a method of using two or more shields in combination, for example, a method of combining two or more elongated shields to cover the target building, and a method of using two or more shields each independently of the target building To cover the target building in layers. As a method of combining the two or more shields to cover the target building, for example, two shields are arranged so as to be symmetrical with respect to the target building, and the two shields are extended. Then, a method of covering the target building by combining the two above the target building can be given. As a method of combining the two shields, for example, a method in which a magnet is installed at the tip of the two shields and the two shields are combined by the coupling force of the magnets, and one of the shields A male coupling member is installed at the distal end of the female coupling member, and a female coupling member having a structure connectable to the male coupling member is installed at the distal end of the other shield. A method of joining two shields by joining the female joining member in the air can be used. In the method using the male and female coupling members, as long as the combustion gas pressure of the explosive in the shield extending means described below is effectively acting, the male coupling member and the female coupling member are mutually connected. The two shields can be combined in a state where they are crimped and substantially no gap is generated between the two shields.

The shield extending means is a means for bringing the shield in a folded state into an extended state. The method for extending the shield in the shield extending means is not particularly limited as long as the shield can be covered with the target building. For example, a method using gas pressure generated by combustion of gunpowder, high pressure Examples include a method using gas, a method using electric means, and a manual method. Among these, the operation method using combustion of explosives is particularly preferable in that the time required to change the shield from the contracted state to the expanded state is shorter than other operation methods using electricity or the like. Therefore, if an operation method based on the combustion of explosive is adopted as a means for extending the shield, it is possible to instantly cover the target building with the shield when an accident occurs in the target building.

Hereinafter, the shield extending means will be described mainly with respect to the shield extending means adopting an operation system by combustion of explosive.

The structure of the shield extending means is not particularly limited as long as a gas is generated by burning the explosive and the shield can be extended by the pressure of the gas. For example, a hole is provided in one end surface of the hollow cylinder, a piston is inserted into the hole,
In the internal space of the hollow cylindrical body, a disk body slidably provided on the inner peripheral surface of the hollow cylindrical body and the piston are coupled, and the hollow cylindrical body is provided on the side where the hole is not provided. A shield extending means (hereinafter, referred to as a piston type shield extending means) in which an explosive is stored in the internal space between the end face and the disk body can be given. According to this piston-type shield extending means, the disk protrudes the piston into the outer space of the hollow cylinder by the pressure of the gas generated by the combustion of the explosive. For example, if the shield extending means is provided between the constituent portions of the fold portion of the shield, the shield extends when the protruding piston pushes the adjacent constituent portion. In the case where the piston type shield extending means is employed, the combustion gas of the explosive is discharged out of the shield extending means by accommodating all of the explosive in the closed hollow cylindrical body. Therefore, even if the explosive is burned, the shock wave generated by the burning of the explosive does not have a significant effect on the shield or the external environment.

When the shield is a bellows body, it is possible to use a shield extending means in which the openings at both ends of the bellows body are closed and an explosive is accommodated in the inner space. According to this shield extending means, the pressure of the gas generated by the combustion of the explosive in the internal space does not escape to the outside of the shield, and most of the generated pressure is consumed for the extension of the shield. And the fact that members such as the piston are unnecessary.

There is no particular limitation on the method of detonating the explosive as long as it can be detonated instantaneously when the shield is extended, and examples thereof include a method using a fuse, a method using electric means, and a method using mechanical shock. it can. Also,
It is also possible to link the accident detector and the shield extending means, and to automatically activate the shield extending means according to an instruction from the accident detector.

The explosive used for the shield extending means is not particularly limited as long as a gas is generated by combustion and the shield can be extended by the gas pressure.
Explosives mainly composed of nitrocellulose, explosives mainly composed of nitrocellulose and nitroglycerin, explosives mainly composed of perchlorate, explosives mainly composed of nitrate and the like can be mentioned.

The amount of the explosive can be appropriately determined according to the energy required for extending the shield.

The number of the shield extending means can be determined as appropriate according to the structure and size of the shield.
One or a plurality of shields may be provided. When a plurality of shields are provided, they may be provided in a concentrated manner at a specific location of the shield, or may be provided dispersedly over the entire shield.

The shield guiding means guides the shield extending by the action of the shield extending means in a direction in which the shield covers the target building.

The structure of the shield guiding means is not particularly limited as long as the shield can be guided so as to cover the upper part of the target building. For example, a hood-like structure and a rail-like structure can be given. As the hood-like structure,
At the tip of the shield in the extension direction, a frame that can move in an arc around a fulcrum is attached, and when the shield is extended, the tip of the shield moves on the motion path drawn by the frame. And so on. As the rail-shaped structure, a rail is provided that extends in an arc shape above the target building, and the shield is provided with a guide that engages with the rail and is movable along the rail, and the shield is There is a structure that extends while moving on the rail.

Further, when a plurality of the above-mentioned piston type shield extending means are provided on one side of the shield and the shield extending means is activated, the shield is extended by the action from only one side. The shield extends while being curved in the direction of the side opposite to the side on which the shield extending means is provided. In other words, the shield is guided in the side surface direction opposite to the side surface on which the shield extending means is provided. In this case,
The plurality of shield extending means correspond to shield guiding means as a whole.

The building emergency shut-off facility of the present invention can be used for any building as long as it can be substantially shielded by the shield. Examples of the building include a building using a nuclear material and a building other than the building. Examples of the building of the nuclear material-using facility include buildings such as a nuclear power plant, a nuclear fuel chemical processing facility, and a radioactive waste storage. Examples of the other buildings include buildings such as various factories such as a chemical plant, a microorganism research institute, a thermal power plant, and a gas storage facility.

The building emergency shutoff system of the present invention operates as follows. The building emergency shutdown equipment of the present invention is installed around a target building. When there is no abnormality in the target building, the fold of the shield is in a folded state, and the building emergency shut-off facility of the present invention is compactly stored around the target building.

When a radioactive substance or the like is released from the target building, the explosive charged in the shield extending means is detonated, and the explosive is burned to generate gas. The pressure of the gas extends the shield. The shield extends in a direction covering the upper part of the target building by the action of the shield guiding means. When the shield reaches the side opposite to the installation position of the shield with respect to the target building beyond the target building, the target building is covered with the shield. In the case of a shield of a type in which two or more shields are combined to cover the target building, each shield that has been extended by the action of the shield extending means and has moved a predetermined activation by the action of the shield guidance means. The body is covered at a predetermined position in the sky to cover the target building.

The scattered matter accompanying the accident of the target building is shielded by a shield covering the target building. In particular, any type of shield that completely covers the target building and can completely isolate the target building from the external environment can completely block flying objects from the target building. For example,
If the target building is a facility that uses nuclear materials, radioactive materials can be prevented from being released to the external environment. At the same time, shielding of radiation is possible. In addition, when the target building is a chemical factory, it is possible to prevent the release of toxic gases and the like to the outside environment, and when the target building is a microbiological laboratory, the release of harmful microorganisms to the outside environment can be prevented. Can be prevented. In the event of a fire accident, the shield will cover the target building, limiting the supply of oxygen,
The spread of fire can be prevented.

Further, since the gas pressure due to the combustion of the explosive is instantaneously generated, the shield extends in a very short time and covers the target building. Therefore, immediately after the occurrence of the accident, if the start-up operation of the shield extending means is performed, the shielding of the target building is completed at a stage where there is almost no release of flying objects due to the occurrence of the accident, and the pollution of the external environment is prevented.

Further, if the accident occurrence detector and the shield extending means are linked, the shielding can be completed immediately after the occurrence of the accident, and the contamination of the external environment can be almost completely prevented.

That is, the building emergency shutoff system of the present invention functions as the last partition to achieve public safety in the event of a worst accident.

When the shielding of the target building is completed, the scattered objects or radiation are blocked, and if the target building is of a type that can completely isolate the target building from the external environment, the accident processing staff can use it. There is no danger even when approaching the vicinity of the accident site, and there is no need to affect the airplane or the like that is sailing above. Further, for example, the shield is provided with an inlet / outlet connecting the inner space and the outer space separated by the shield, or an underground passage connecting the two spaces is provided by the shield from the space outside the shield. By providing a means for entering an accident processing staff or the like in the internal space, it is possible to perform quick accident processing in a state where the target building is isolated from the external environment.

The shield that shields the target building is kept in a state where the target building remains shielded until there is no danger of radioactive material or radiation, and is stored after eliminating the danger of radioactive material or radiation. When storing the shield,
By discharging the combustion gas of the explosive sealed in the shield extending means to the outside, the force applied to the shield can be removed, and the shield can be returned to the folded state before the extension. Although the building emergency shut-off facility of the present invention is usually replaced after being used once, it can be reused depending on the condition of the shield or the like after use.

Hereinafter, a specific example of the building emergency shutdown facility of the present invention will be described with reference to the drawings. FIGS. 1a and 1b show a building emergency shutdown facility 1 which is a specific example of the building emergency shutdown facility of the present invention. FIG. 1a is a cross-sectional view of the building emergency shutdown facility 1 in a folded state, and FIG. 1b is a cross-sectional view of the building emergency shutdown facility 1 in an extended state.

The building emergency shut-off facility 1 has a shield 2, a shield extending means 3, and a pointing member 4. Shield 2
Has the plate-like body connection structure described above. The plate 5 constituting the shield 2 has a rectangular planar shape, and is connected to an adjacent plate at an end face on the long side. The lower end of the shield 2 is fixed to the ground.

The shield extending means 3 is used when the shield 2 is completely extended and the respective plate-like members 5 are arranged in a plane on the lower surface of the shield 2 in the folded state. , On the side forming the same plane.

The shield extending means 3 is of the above-described piston type, and includes a cylindrical body 6, a piston 7, a pressure transmitting plate 8, and an explosive 9. The openings at both ends of the cylindrical body 6 are closed, and the cylindrical body 6 is attached to the shield 2 with both end surfaces in contact with the adjacent plate-like body 5. Further, both ends of the tubular body 6 are tapered in accordance with the angle formed by the adjacent plate-like bodies 5 so that the axis of the tubular body 6 is in the vertical direction.

A hole 6a is provided at the center of the lower end surface of the cylindrical body 6, and a piston 7 is inserted into the hole 6a. FIG. 1c
2 shows an enlarged view of the piston 7. The piston 7 is constituted by three cylindrical shafts 7a, 7b and 7c. The shaft 7a is fitted in the shaft 7b, and the shaft 7b is fitted in the shaft 7c.
One end of the shaft 7c is closed. Cylinder 6
A pressure transmission plate 8 is slidably provided on the inner peripheral surface of the cylindrical body portion 6 in the internal space of, and is connected to the shaft 7a. The pressure transmitting plate 8 has a hole 8a communicating with the hollow portion of the shaft 7a.
Is provided. An explosive 9 is accommodated between the pressure transmitting plate 8 and the end surface of the cylindrical portion 6 on the side where the hole 6a is not provided.

The pointing member 4 is disposed on the surface of the shield 2 facing the lower side of the plate 5 in the folded state, on which the shield extending means 3 is not provided. The support 4 stabilizes the structure of the shield 2 in the folded state.

The building emergency shutoff system 1 operates as follows. When it becomes necessary to cover the target building 10 with the building emergency shut-off device 1, the explosive 9 is detonated and burned, and the pressure of the combustion gas moves the pressure transmission plate 8 downward, causing the piston 7 to move downward. It protrudes out of the body part 6. FIG. 1d
1e shows the action of the piston 7. FIG. The gas is
Through the hole 8a, it flows into the hollow part in the piston 7, and the shaft 7c and the shaft 7b are slid with respect to the outer peripheral surfaces of the shafts 7b and 7a, respectively, to extend the piston 7. The end of the shaft 7c and the end of the shaft 7b, and the end of the shaft 7b and the end of 7a are:
Since the respective shafts can be engaged with each other, the three shafts do not separate from each other. The piston 7 of the shield extending means 3 provided at the bottom of the building emergency shutoff equipment 1 pushes the ground, and the plate 5 moves upward by the reaction force. At this time, each of the plate-like bodies 5 on which the shield extending unit 3 is installed is connected to the plate-like body 5 provided at the lower end thereof (the shield extending unit 3 provided at the bottom is installed). The plate-shaped body 5 is moved so as to open using the connection between the plate-shaped body 5 and the ground) as a fulcrum. As a result, the shield 2 extends.

Then, as shown in FIG. 1B, when the shield 2 is completely extended and the respective plate-shaped members 5 are arranged in a plane, the shield extending means 3 forms a surface on the side forming the same plane. , The shield 2 does not extend in the vertical direction, but extends while curving in the direction of the surface on which the shield extending means 3 is not provided.

As shown in FIG. 2 a, the building emergency shut-off facility 1 is installed on the side of the target building 10, the side on which the shield extending means 3 is not provided, facing the target building 10. That is, in the building emergency shutdown facility 1, each shield extending means 3 simultaneously functions as a shield guiding means.

Therefore, when the building emergency shutdown facility 1 is extended in the event of an accident or the like of the target building 10, the building emergency shutdown facility 1 extends in the upward direction of the target building 10. Since the building emergency shutdown facility 1 has a length sufficient to cover the target building 10 and an amount of explosive that generates sufficient energy, the building emergency shutdown facility extending above the target building 10 The tip of 1 directly passes over the target building 10 and, as shown in FIG.
It reaches the ground on the opposite side of the installation point of the building emergency shutdown facility 1. Since the inside of the shield extending means 3 has a sealed structure,
The combustion gas pressure of the explosive 9 is kept constant in the shield extending means, and the piston 7 maintains the extended state. as a result,
The two adjacent plate-like bodies 5 are supported by each other by the shield extending means 3 existing therebetween, and the bridge structure of the building emergency shutdown facility 1 covering the target building 10 as shown in FIG. It does not collapse and is kept as it is.

In this way, the building emergency shutoff facility 1
Can cover the target building 10 in the event of an accident occurring in the target building 10 and shield flying objects from the target building 10.

FIGS. 3A and 3B show a building emergency shutdown facility 11 which is a modification of the building emergency shutdown facility 1. FIG.
FIG. 3A is a cross-sectional view of the building emergency shutdown facility 11 in a state where the building emergency shutdown facility 11 is folded, and FIG.
b is a sectional view of the building emergency shutdown facility 11 in a state where the building emergency shutdown facility 2 is extended. In the building emergency shutdown facility 2, the building shutdown body 12a and the building shutdown body 12b are used as one set. Building blocker 12a
Has the same structure as that of the building emergency shutoff facility 1 except that it has a uniting magnet 13 on its upper end surface.
2b has the uniting iron plate 14 on its upper end surface,
The structure is the same as that of the building emergency shutdown facility 1. The building blocker 12a and the building blocker 12b are installed at positions opposite to each other with respect to the target building 10.

The target building 10 is connected to the building emergency shutdown facility 11
When covering with the building blocker 12a and the building blocker 1
2b are simultaneously extended. The building blocker 12a and the building blocker 12b operate similarly to the building emergency shutdown facility 1. The building blocker 12a extending with the uniting magnet 13 at the top and the building blocker 12b extending with the uniting iron plate 14 at the top collide with each other above the target building 10, and the uniting magnet 13 and the uniting magnet 13 are joined together. As shown in FIG. 3B, they are united by the action of the iron plate 14 to form a semicircular structure as a whole and cover the target building. As described above, the building emergency shutdown facility 11 can also shield the flying objects from the target building 10 in the same manner as the building emergency shutdown facility 1.

The building emergency shutoff facility 1 or the building emergency shutoff facility 11 can be used in combination of two or more. In this case, a structure in which two or more bridge structures cross at the upper part of the target building 10 is obtained. Building emergency shutdown facility 1 or building emergency shutdown facility 11
The target building 10 can be covered with a structure suitable for the purpose by appropriately determining the installation position, direction, and the like.

FIGS. 4A and 4B show a building emergency shutdown facility 15 which is a specific example of the building emergency shutdown facility of the present invention. FIG. 4A is a side view of the building emergency shutdown facility 15 in a folded state, and FIG. 4B is an extended view of the building emergency shutdown facility 1 in a state of covering the target building 10.
5 is a perspective view of FIG.

The building emergency shut-off facility 15 includes a shield 16
And shield extending means 17. FIG. 4C shows an enlarged view of the installation portion of the shield extending means 17.

The shield 16 has the above-described flexible member connection structure. The shield 16 has a skeletal member 18, a sheet-like flexible member 19, and a support shaft 20. Each skeleton member 18
Has a semicircular shape, and holes are provided at both ends thereof, and the support shaft 20 is passed through each of the holes. Therefore, each skeletal member 18 can rotate around the support shaft 20. A sheet-like flexible member 19 is provided between each of the skeleton members 18 and connects the whole of the skeleton members 18 to each other. Sheet-like flexible member 19
Is a slackened state when the building emergency shut-off facility 15 is folded, and becomes a stretched state when the building emergency shut-off facility 15 is extended and the interval between the respective frame members 18 is widened. That is, the building emergency shutdown facility 15 has a hood structure, and in the building emergency shutdown facility 15,
Each skeleton member 18 and the support shaft 20 function as shield guiding means.

The shield extending means 17 has the same structure as that of the shield extending means 3 and is provided on the lower end surface of the peripheral portion of each skeleton member 18. The body extending means 17 is in contact with a skeletal member 18 adjacent below the skeletal member 18 on which the body extending means 17 is installed.

The shield extending means 17 is arranged at a position such that the semicircular structure of the skeletal member 18 surrounds the target building 10 with respect to the target building 10 as shown in FIG.

The building emergency shutoff facility 15 operates as follows. When it becomes necessary to cover the target building 10 with the building emergency shutdown facility 15, the shield extending means 17 is operated. The shield extending means 17 is provided with the shield extending means 3.
Works in the same way as By the action of the shield extending means 17,
Each skeletal member 18 receives an upward force and moves upward.
Since both ends are fixed to the skeleton members 18 by the support shafts 20, the skeleton members 18 move while drawing an arc around the support shaft 20. When the energy generated by the shield extending means 17 is sufficiently large, the skeleton member 18 at the uppermost end of the building emergency shutdown facility 15 is
Moves over the vertex of the arc-shaped orbit drawn by the arrow, moves to the side opposite to the side where the shielding body 16 was initially provided with respect to the support shaft 20, and reaches the ground as it is. In this way, as shown in FIG. 4b, the target building 10 is covered by the building emergency shutdown facility 15.

In this way, the building emergency shutoff facility 15
Is to completely cover the target building 10 in the event of an accident of the target building 10, isolate the target building 10 from the external environment, and prevent pollution of the external environment due to release of radioactivity due to damage to the target building 10, etc. can do.

The building emergency shut-off facility 15 also uses two building shields in the same manner as the building emergency shut-off facility 11, and extends each building shield from both sides of the target building 10 to obtain the target. Both can be combined at the upper part of the building 10.

FIG. 5A and FIG. 5B show a building emergency shutoff facility 21 which is a modification of the building emergency shutoff facility 15. FIG. 5A is a perspective view of the building emergency shutdown facility 21 in a folded state, and FIG. 5B is an extended view of the building emergency shutdown facility 21 in a state of covering the target building 10.
It is a perspective view of.

The building emergency shut-off facility 21 includes a shield 22
And a shield extending means 23 and a shield moving means 24. The shield extending means 23 is provided with the shield extending means 17.
Is the same as

The shield 22 has a skeleton member 25 and a sheet-like flexible member 26. Sheet-shaped flexible member 26
Is the same as that of the sheet-like flexible member 19.

The shield moving means 24 is a quadrangular prism,
Grooves 27 extending in the long side direction are provided on two opposing side surfaces. Further, at both end portions of the shield moving means 24, curved surface portions 32a and 32b formed in a semicircular shape are provided. The shield moving means 24 is a pair of two, and is provided by the same number as the skeletal member 25.

The shape of the skeleton member 25 is U-shaped.
The skeleton member 25 is the same as the skeleton member 18 except for the shape and the structure at both ends. Both ends of each skeletal member 25 are provided with shield moving means 24 corresponding to the respective skeletal member 25.
It is connected to. FIGS. 6A and 6B show a connecting portion between the skeleton member 25 and the shield moving means 24. FIG. FIG. 6A is an enlarged view of a connecting portion between the skeleton member 25 and the shield moving unit 24, and FIG. 6B is an enlarged plan view of a connecting portion between the skeleton member 25 and the shield moving unit 24.

At the end of the skeletal member 25, a recess 31 is provided. At the end of the skeletal member 25, a projection 28 which engages with the groove 27 is provided in the recess 31. further,
A wheel 30 is provided in the recess 31 via an axle 29, and the wheel 30 is in contact with the shield moving unit 24. In a state where the building emergency shut-off device 21 is folded, the respective skeletal members 25 are horizontally arranged as shown in FIG. 6A, and the protrusions 28 are located at the ends 27a of the grooves 27.

In the building emergency shutdown facility 21, the skeletal member 25 and the shield moving means 24 function as shield guiding means.

The building emergency shutdown facility 21 operates as follows. By the action of the shield extending means 23, the shield 22
Extend, and each skeletal member 25 moves in the direction of the arrow shown in FIG. 6a. At this time, the wheel 30 rises to the upper surface side of the shield moving means 24 while rotating on the curved surface portion 32a. When the skeleton member 25 provided at the uppermost end of the shield 22 reaches the vertical state (FIG. 6C), the wheels 30 provided on the skeleton member 25 move while rotating on the shield moving means 24 as it is. Thereby, the skeletal member 25 moves on the shield moving means 24 in the horizontal direction. Thereafter, the other skeletal members 25 similarly move on the shield moving means 24 one after another in the horizontal direction. When the projection 28 provided on the skeletal member 25 that moves first on the shield moving means 24 reaches the end 27b of the groove 27 opposite to the end 27a, the protrusion 28 is provided on the skeleton 25. The wheel 30 descends on the curved portion 27b, and the skeletal member 25 advances toward the lowering. The other skeletal members 25 proceed similarly,
When the skeletal member 25 moving first on the shield moving means 24 reaches the ground, the entire movement of the shield 22 substantially ends. In this way, the shield 22 is provided in FIG.
The state shown in FIG.

The building emergency shut-off device 21 can be extended in the horizontal direction as described above, so that it is effective when the target building is horizontally long.

Further, as for the building emergency shut-off facility 21, two building shields are used similarly to the building emergency shut-off facility 11, and each building shield is extended from both sides of the target building 10. Alternatively, the two can be combined at an arbitrary point on the shield moving means 24.

Next, as another modification of the building emergency shut-off facility 15, a building emergency shut-off facility 33 having a bellows structure as a shield will be described. FIG. 7 is a plan view of a skeletal member 34 used for the building emergency shutoff facility 33. The skeleton member 34 has an outer shell part 34a, an inner shell part 34b, and a reinforcing part 34c.
That is, the skeleton member 34 includes the outer shell portion 34a and the inner shell portion 3
A gap 35 formed by 4b is provided.
Further, the skeletal member 34 is connected at its distal end 34c by a support shaft, as in the case of the building emergency shutdown facility 15.

FIG. 8 is a partially enlarged view of the shield 37 in the building emergency shutoff facility 33. Each skeleton member 34 is connected to an adjacent skeleton member 34 by a flexible member 36 at an outer shell portion 34a and an inner shell portion 34b. Further, the flexible members 36 connecting the respective skeletal members 34 are installed so as to surround the outer peripheral edges of the respective skeletal members 34. The skeletal members used at both ends of the shield 37 have the same planar shape as the skeletal member 34, but have a structure having no void.

The shield 34 has the above-described structure, so that the sealed internal space formed by the two skeleton members disposed at both ends of the shield 37 and the flexible member 36 is formed. 38. That is, the shield 34 has a bellows structure. The skeletal members used for the shield 34 are connected by a method similar to the method using the support shaft 20 in the building emergency shutoff facility 15. Therefore, in the building emergency shutdown facility 33, similarly to the building emergency shutdown facility 15, each skeletal member and the support shaft function as shield guiding means.

Further, in the building emergency shut-off facility 33, as the shield extending means, the above-mentioned means in which the explosive 39 and the detonating means (not shown) are accommodated in the internal space 38 is adopted.

The building emergency shut-off facility 33 operates as follows. FIG. 9A is an end view showing the positional relationship between the building emergency shutdown facility 33 and the target building 10. Shield 37
Is initially in a folded state, as shown in FIG. 9a. Therefore, the volume in the internal space 38 is very small.
The explosive 39 contained in the internal space 38 is detonated, and the explosive 3
9 is burned. The explosive 39 generates gas. Since the internal space 38 is sealed, the volume of the internal space 38 increases by the volume of the generated gas. Therefore, the shield 37 extends upward. After that, the target building 10 is covered in the same manner as the building emergency shutdown facility 15. FIG. 9b shows an end view of the building emergency shutdown facility 33 in a state where the target building 10 is covered. The overall image of the building emergency shutdown facility 33 in a state where the target building 10 is completely covered is the same as the building emergency shutdown facility 15 shown in FIG. 4B.

Since the building emergency shut-off facility 33 has a structure in which the target building 10 is double-covered by the flexible member 36, even if the flexible member 36 on the inner layer is damaged, etc.
There is an advantage that the shielding property is maintained. Further, if the radiation absorbing gas is sealed in the internal space 38 or boric acid water or the like is injected after the shield 37 is extended, the radiation can be shielded.

[0097] As for the building emergency shut-off facility 33, two building shields are used similarly to the building emergency shut-off facility 11, and each building shield is extended from both sides of the target building 10. Both can be combined at the upper part of the building 10.

[0098]

According to the present invention, a building emergency shut-off system is provided for nuclear-related facilities when a nuclear material-using facility, such as a nuclear power plant or a nuclear fuel chemical processing facility, emits radioactive materials and radiations from the facility. It is possible to prevent or reduce the emission of scattered matter such as radioactive materials and radiation to the external environment.

Further, the building emergency shut-off facility of the present invention
Except for nuclear facilities, the release of toxic gases and harmful microorganisms to the external environment can be prevented in chemical factories and microbial laboratories.

Further, the building emergency shut-off device of the present invention is required to maintain confidentiality of third parties at the time of on-site inspection by police and insurance companies, etc., or to require emergency assurance against sudden weather changes. It can be used at times.

After the accident occurrence facility is covered, scattered objects from the accident occurrence facility are shielded, so that the worker can easily approach the accident occurrence facility and speed up the accident processing. it can.

Since the building emergency shut-off system of the present invention is operated by the combustion gas pressure of the explosive, the operating speed is high.
After a necessary event such as an accident occurs, the accident-occurring facility or other object can be covered immediately.

Since the building emergency shut-off device of the present invention can be folded and stored when not in use, the storage space does not become excessively large and can be made portable.

[Brief description of the drawings]

FIG. 1a is a cross-sectional view of the building emergency shutdown facility 1 in a folded state.

FIG. 1b is a cross-sectional view of the building emergency shutdown equipment 1 in an extended state.

FIG. 1c is an explanatory view showing the structure of a piston 7.

FIG. 1d is an explanatory view showing a process in which the piston 7 extends.

FIG. 1e is an explanatory view showing a state where the piston 7 is extended.

FIG. 2A is an explanatory diagram showing a positional relationship between a building emergency shutdown facility 1 and a target building 10;

FIG. 2B is an explanatory diagram of the building emergency shutdown facility 1 in a state where the target building 10 is covered.

FIG. 3a is a cross-sectional view of the building emergency shutdown facility 11 in a folded state.

FIG. 3b is a cross-sectional view of the building emergency shutdown facility 11 in an extended state.

FIG. 4a is a side view of the building emergency shutdown facility 15 in a folded state.

FIG. 4B is a perspective view of the building emergency shutdown facility 15 in a state where the target building 10 is covered.

FIG. 4c is an enlarged view of an installation portion of the shield extending means 17;

FIG. 5a is a perspective view of the building emergency shutdown facility 21 in a folded state.

FIG. 5B is a perspective view of the building emergency shutdown facility 21 in a state where the building 10 is covered.

FIG. 6A shows a skeleton member 25 and a shield moving means 2;
FIG. 4 is an enlarged view of a connecting portion with No. 4.

FIG. 6B shows the skeleton member 25 and the shield moving means 2;
FIG. 4 is an enlarged plan view of a connection portion with No. 4.

FIG. 6C shows a state in which the skeletal member 25 is moved by the shield moving means 2;
FIG. 4 is an explanatory diagram showing a state of moving on the top of FIG.

FIG. 7 is a plan view of a skeletal member 34 used for a building emergency shutdown facility 33.

FIG. 8 is a partially enlarged view of a shield 37 in the building emergency shutoff facility 33.

9a is an end view of the building emergency shutdown facility 33 and the target building 10. FIG.

FIG. 9B is an end view of the building emergency shutdown facility 33 in a state where the building 10 is covered.

[Explanation of symbols]

1. Emergency shut-off facility for building, 2 .... Shield, 3 .... Shield extension means, 4 .... Instruction member, 5 .... Plate, 6 .... Cylinder, 6a ... Hole, 7. · Piston, 7a · · shaft, 7b · · · shaft, 7c · · · shaft, 8 · · · pressure transmission plate, 8a · · · holes, 9 · · · explosives, 10 · · · target building, 11 · · · building emergency shut-off equipment , 12a · · · building blocker, 12b · · · · building blocker, 13 · · · magnet for merging,
14 ・ ・ Steel plate for uniting, 15 ・ Emergency shut-off facility for buildings, 1
6. shield, 17 shield extending means, 18 skeletal member, 19 flexible sheet member, 20 support shaft, 2
1. Emergency shut-off equipment for buildings, 22 ... Shield, 23 ...
Shield extending means, 24 Shield moving means, 25 Skeletal member, 26 flexible sheet member, 27 groove, 2
7a ··· distal end, 27b ··· distal end, 28 ··· projection
29 axle, 30 wheel, 31 recess, 32a
..Curved surface part, 32b..Curved surface part, 33..Emergency building shutoff equipment, 34..Frame member, 34a..Outer shell part, 34b
..Inner shell, 34c, end, 35, void, 36
..Flexible members, 37.Shields, 38..Internal spaces,
39 ... gunpowder

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E001 DH05 FA26 GA12 GA24 2E141 AA00 BB01 BB05 CC01 CC05 DD11 EE36

Claims (5)

[Claims] 1. A shield having a stretchable structure folded in a stack and capable of covering an upper part of a building in an extended state, and a shield in an extended state in which the shield in the folded state is extended. Building emergency means for guiding a building extending by the action of the shielding body extending means and a guiding means for guiding the shielding body in a direction in which the shielding body covers the building. Isolation equipment. 2. A shield having a stretchable structure which is folded in a stack and capable of covering an upper part of a building in an extended state, and a gas pressure generated by burning of an explosive, thereby folding the structure. A shield extending means for extending the shield in the extended state, and a shield for guiding the shield extending by the action of the shield extending means in a direction in which the shield covers a building. An emergency shutdown facility for a building, characterized by having guidance means. 3. A shield having an extendable bellows structure and capable of covering an upper part of a building in an extended state, and a gas which is installed in an internal space formed by the shield and is generated by combustion of an explosive. Utilizing pressure, shield extending means for extending the shield in the folded state, and the shield extending by the action of the shield extending means,
And a shield guiding means for guiding the shield in a direction to cover the building. 4. The building emergency shut-off facility according to claim 1, wherein the shield comprises a radiation shielding material. 5. The building emergency shutdown facility according to claim 1, wherein the building is a facility using nuclear material.