JP6603000B1 - Nuclear power facility closure device - Google Patents

Abstract

[PROBLEMS] To maintain an open state even when a large load is applied in the vertical direction, and when a plurality of shielding doors are arranged close to each other, the pressure inside the building when an abnormal situation occurs It is possible to realize a layout that is easy to escape. A closing device (1) is interposed between a shielding door (10) and a frame frame (20), has shafts (31c, 32c) extending in the vertical direction, and hinges (31, 32) for rotatably supporting the shielding door (10). have. A driving device 40 is disposed on the side of the shielding door 10 below the center of the shielding door 10 in the vertical direction. [Selection] Figure 5

Description

  The present invention relates to a closing device provided in a nuclear power generation facility.

  Conventionally, a nuclear power generation facility has a reactor building in which a reactor pressure vessel is stored, a turbine building in which a turbine rotated by steam pumped from the reactor pressure vessel is stored, and an MS tunnel that connects the reactor building and the turbine building. It consists of rooms. The MS tunnel room is also called a main steam pipe tunnel room (MSIV room).

  In the reactor building and the MS tunnel room adjacent to the reactor building, it is conceivable that the internal pressure increases greatly when an abnormal situation occurs, for example, when a steam pipe or the like ruptures. Assuming the occurrence of such an abnormal situation, the walls of the reactor building and MS tunnel room are blown out to the internal pressure by being pushed out of the facility and released when the internal pressure rises abnormally. Safety devices such as an out panel (BOP) and a rupture disk that releases internal pressure when it bursts are installed.

  If the blowout panel remains detached due to the occurrence of an abnormal situation, the radioactive material in the building may continue to leak out of the facility. For example, the closing device disclosed in Patent Documents 1 to 3 It is considered that the opening is closed after the blowout panel is opened. The closing devices of Patent Documents 1 and 2 include a shielding door that can slide to a closed position so as to close the opening after the blowout panel is opened. In addition, the closing device of Patent Document 3 includes a shielding door that is attached to the upper end of the frame so as to be rotatable about a horizontal axis, and after the blowout panel is opened, the shielding door is connected to an actuator or the like. Is rotated to a closed position for closing the opening.

Japanese Patent No. 6430055 Japanese Patent No. 649449 Japanese Patent No. 6494850

  By the way, in the closing devices of Patent Documents 1 and 2, since the shielding door is structured to slide in the horizontal direction, when it is applied to a place where blowout panels and rupture disks are densely packed, the shielding door is normally open. Is positioned so as to block the adjacent opening, and as a result, the effective opening area is reduced, which may be an obstacle in releasing the internal pressure when an abnormal situation occurs.

  Therefore, as in Patent Document 3, if a shielding door that rotates around the horizontal axis is provided and the adjacent opening is not blocked when the door is normally open, a wide effective opening area can be secured. Therefore, it is considered that the internal pressure can easily escape when an abnormal situation occurs.

  However, in patent document 3, it has the structure hold | maintained in the state which turned the shielding door at the time of opening upwards. The shielding door can be kept open even if a large earthquake of the direct type occurs, for example, and the pressure can be released when there is a sudden pressure increase in the building that may occur after that. It must be done as follows. However, assuming that a large earthquake of the direct type occurs, it is fully considered that a large load several times or more than usual is applied to the shielding door in a downward direction. It is extremely difficult to hold the cover so that it does not rotate downward. In view of the weight of the shielding door, Patent Document 3 requires a large drive device.

  When the driving device becomes large, it becomes a problem to lay out the driving device on the wall of the building so as not to be an obstacle when the internal pressure is released when an abnormal situation occurs. In particular, when it is desired to provide a plurality of shielding doors close to each other, such as a place where blowout panels and rupture disks are densely arranged, the arrangement of the driving device becomes a more significant problem.

  The present invention has been made in view of such a point, and the object of the present invention is to enable the shielding door to be held open even when a large load is applied in the vertical direction, and to provide a plurality of shielding doors. In the case of arranging them close to each other, it is possible to realize a layout that can easily release the pressure inside the building when an abnormal situation occurs.

  In order to achieve the above object, according to the present invention, the shielding door is rotatably supported with respect to the support body by a shaft extending in the vertical direction, and the drive device for driving the shielding door is arranged in the vertical direction on the side of the shielding door. It was arranged below or above the center part.

A first aspect of the present invention is a nuclear power generation facility closing device that closes an opening formed in a wall when a blowout panel or a rupture disk provided on a wall constituting the nuclear power generation facility is opened. A door, a support that supports the shielding door, and a shaft that extends between the shielding door and the support and extends in a vertical direction, and supports the shielding door so as to be rotatable about the axis. A hinge that switches between a closed state that closes the opening and an open state that opens the opening, and is disposed below or above the center in the vertical direction of the shielding door on the side of the shielding door, and a drive device having a rotating force generator for generating a rotational force for rotating the output shaft and having an output shaft for driving the shielding door about said axis, said output shaft, parallel to the axis of the hinge Characterized in that it is arranged.

  According to this configuration, the shielding door is rotatably supported by the support body by the shaft, so that the opening located next to the shielding door is not blocked when the shielding door is normally open. A wide effective opening area is secured. Further, since the shaft supporting the shielding door extends in the vertical direction, even if a large load is applied in the vertical direction, the direction of the load is the axial direction. Thereby, it becomes possible to hold | maintain a shielding door in an open state, without setting it as a large structure compared with the case where it acts around an axis | shaft like patent document 3. FIG. Therefore, the structure for holding the shielding door in the open state becomes compact, and it is difficult to disturb the internal pressure when the abnormal situation occurs.

  Further, when the blowout panel is removed due to the occurrence of an abnormal situation or when the rupture disc is ruptured, the driving device can turn the shielding door around the axis to close it. Thereby, it is suppressed that the radioactive substance etc. which exist in a building leak outside a facility.

  Also, it is conceivable to increase the total opening area by preparing a plurality of the closing devices and arranging them close to each other in the horizontal direction. In this case, when the driving device is located on the side of the shielding door at a position lower than the central portion in the vertical direction of the shielding door, the driving device is turned upside down by inverting the closing device arranged next to the driving device. Is positioned on the side of the shielding door above the center of the shielding door in the vertical direction. In addition, when the driving device is located on the side of the shielding door above the central portion in the vertical direction of the shielding door, the driving device is turned upside down by turning the closing device arranged next to it upside down. At the side of the shielding door, the shielding door is positioned lower than the central portion in the vertical direction. That is, in any case, it is possible to arrange the driving devices of the adjacent closing devices side by side in the vertical direction, so that the dead space is reduced and a large effective opening area is secured. Thereby, the layout which is easy to release the pressure inside the building when an abnormal situation occurs is realized.

  The second invention includes an open-side elastic member that applies a repulsive force in the closing direction to the shielding door in the open state, and a first lock device that locks the shielding door in the open state. It is characterized by.

  According to this configuration, when the shielding door is opened, the shielding door is locked by the first locking device. At this time, since the repulsive force acts on the shielding door in the closing direction by the opening-side elastic member, for example, the shaking of the shielding door and rattling are suppressed with respect to the rolling at the time of the occurrence of the earthquake.

  3rd invention is provided with the closing side elastic member which makes a repulsive force act on the said shielding door in a closed state in an open direction, and the 2nd locking device which locks the said shielding door in a closed state. It is characterized by.

  According to this configuration, when the shielding door is closed, the shielding door is locked by the second locking device. At this time, since the repulsive force acts on the shielding door in the opening direction by the closing-side elastic member, for example, the shaking of the shielding door and rattling are suppressed against the rolling of the earthquake.

  According to a fourth aspect of the present invention, the support is configured by a frame-type frame formed in a frame shape corresponding to the shielding door, and the closing side elastic member is formed to extend along the frame-type frame, The gasket is interposed between the frame frame and the shielding door.

  According to this configuration, when the shielding door is in the closed state, the closing side elastic member is pressed and elastically deformed by the shielding door and the frame frame, and the gap between the shielding door and the frame frame is sealed by the closing side elastic member. Is done.

  According to a fifth aspect of the present invention, the gasket is attached to one of the frame-type frame and the shielding door, and the other of the frame-type frame and the shielding door has a ridge that contacts the intermediate portion in the width direction of the gasket. Is provided so as to protrude toward the one side.

  According to this configuration, when the shielding door is closed, the protruding portion abuts against the intermediate portion in the width direction of the gasket and the contact surface pressure is increased.

A sixth invention is provided with the rotational force generator, and a torque limiter output of the rotational force generator is input, and a transmission member for transmitting the rotational force output from the torque limiter in the shaft It is characterized by that.

  According to this configuration, the output of the rotational force generator is input to the hinge shaft via the torque limiter and the transmission member, thereby rotating the shielding door from the closed state to the open state and vice versa. Is possible. When the shielding door is closed or opened, the shielding door is pressed against another member to stop it. At this time, the torque limiter is placed between the torque generator and the shielding door. By interposing, it becomes possible to prevent each part from being overloaded without special speed control. That is, the place where the closing device according to the present invention is installed is an environment where precision equipment such as an inverter cannot be installed due to temperature, humidity, radioactivity, etc., and it is difficult to perform speed control, but a torque limiter is interposed. By doing so, a reliable operation can be performed even in such an environment.

  In addition, for example, when the shielding door tries to rotate around the axis due to rolling in the event of an earthquake, an unreasonable force is applied to the drive device from the output side, but at this time, each part is applied by a torque limiter Such force is reduced.

  7th invention is equipped with the 1st control apparatus which controls the said drive device and the 1st locking device which locks the said shielding door in the said open state, The said 1st control apparatus is the said state which opened the said shielding door The control device is configured to perform control for operating the driving device until it is set, and control for operating the first lock device after a predetermined time has elapsed after the shielding door is opened. .

  According to this configuration, since the first locking device can be operated after a predetermined time has elapsed after the shielding door is opened, the first locking device is activated after the shielding door is reliably opened. It will be.

  8th invention is equipped with the 2nd control apparatus which controls the said drive device and the 2nd locking device which locks the said shielding door in the said closed state, The said 2nd control apparatus is a state which closed the said shielding door And a control for operating the second lock device after a predetermined time has elapsed after the shielding door is closed. .

  According to this configuration, since the second locking device can be operated after a predetermined time has elapsed after the shielding door is closed, the second locking device is operated after the shielding door is reliably closed. It will be.

The ninth invention is characterized by comprising a storage box for storing the rotational force generator, and a heat insulating material disposed inside the storage box.

According to this structure, it becomes possible to protect a rotational force generator from external heat | fever by accommodating a rotational force generator in the storage box which has heat insulation. Thereby, it is not necessary to use a special motor, and a general-purpose motor can be used.

A tenth aspect of the invention, the output shaft is disposed so as to project in the vertical direction, the driving device includes a drive sprocket fixed to said output shaft, a driven sprocket fixed to said shaft of said hinge And a transmission member wound around the drive sprocket and the driven sprocket.

According to this configuration, since the output shaft protrudes in the vertical direction, the transmission member is wound around the drive sprocket fixed to the output shaft and the driven sprocket fixed to the shaft of the hinge. The door can be rotated.

  According to the first invention, since the shielding door is supported so as to be rotatable around an axis extending in the vertical direction, the shielding door can be held open even when a large load is applied in the vertical direction. In addition, since the driving device for driving the shielding door around the axis is disposed on the side of the shielding door at the lower side or the upper side of the central portion in the vertical direction of the shielding door, the plurality of shielding doors are arranged close to each other. When installing, the drive device can be arranged side by side in the vertical direction to reduce dead space. As a result, it is possible to realize a layout that can easily release the pressure inside the building when an abnormal situation occurs.

  According to the second invention, the repulsive force can be applied in the closing direction by the opening-side elastic member in a state where the shielding door in the open state is locked. The structure can withstand earthquakes by suppressing shaking and rattling.

  According to the third invention, the rebound force can be applied in the opening direction by the closing-side elastic member in a state in which the shielding door in the closed state is locked. The structure can withstand earthquakes by suppressing shaking and rattling.

  According to the fourth invention, the space between the shielding door and the frame frame in the closed state can be sealed by the closing side elastic member.

  According to the fifth aspect of the present invention, the gasket is attached to one of the frame type frame and the shielding door, and the protrusion is provided on the other to contact the intermediate portion in the width direction of the gasket. it can.

  According to the sixth aspect of the invention, since the drive device includes the torque limiter, it is possible to prevent breakage by preventing overloading of each part when opening and closing or when an earthquake occurs.

  According to the seventh aspect, since the locking device can be operated after the shielding door is surely opened, the shielding door can be reliably locked in the opened state.

  According to the eighth aspect of the invention, since the locking device can be operated after the shielding door is securely closed, the shielding door can be reliably locked in the closed state.

According to the ninth invention, since the arranged insulation inside the storage box for storing the rotational force generator, it can protect the rotational force generator from external heat, failure due to heat of the rotational force generator Can be prevented.

According to the tenth aspect of the invention, since the output shaft of the drive device protrudes in the vertical direction, the transmission member is simply wound around the drive sprocket fixed to the output shaft and the driven sprocket fixed to the shaft of the hinge. With a simple configuration, the shielding door can be switched between an open state and a closed state.

It is the schematic of the nuclear power generation facility provided with the closing device which concerns on embodiment of this invention. It is a perspective view when the case where the closing device concerning an embodiment is used side by side is used, and each closing device is in a closed state. FIG. 3 is a view corresponding to FIG. 2 when the closing device is in an open state. It is a block diagram of a closing device. It is a front view of one closing device. It is a front view showing the case where two closing devices are arranged close to the left and right. It is a top view which shows the case where two closing devices are arrange | positioned approaching right and left. It is a side view of the closing device in a closed state. FIG. 9 is a cross-sectional view corresponding to the line IX-IX in FIG. 8, showing a case where the closing device is in an open state. It is the XX sectional view taken on the line in FIG. It is the A section enlarged view of FIG. It is the XII-XII sectional view taken on the line in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

(Configuration of nuclear power generation facility 100)
FIG. 1 is a side view of a nuclear power generation facility 100 including a closing device according to an embodiment of the present invention. The nuclear power generation facility 100 includes a reactor building 102 in which a reactor pressure vessel 101 is stored, a turbine building 104 in which a turbine apparatus 103 that is rotated by steam pumped from the reactor pressure vessel 101 is stored, and a reactor building 102. And an MS tunnel room 105 connecting the turbine building 104. A main steam pipe 106 is connected to the reactor pressure vessel 101, and the main steam pipe 106 extends to the turbine building 104 through the MS tunnel chamber 105 and is connected to the turbine device 103.

  An operation floor 102 a is provided on the top floor of the reactor building 102. The wall of the operation floor 102a of the reactor building 102 is formed with an opening 102b for releasing internal pressure when an abnormal situation occurs such as when the main steam pipe 106 or the like is ruptured. In addition, the wall of the operation floor 102a is blown to release the internal pressure from the opening 102a by being pushed out of the reactor building 102 and released when the internal pressure of the reactor building 102 rises abnormally. A safety device called an out panel (BOP) 110 is provided. Instead of the blowout panel 110, a safety device such as a rupture disk that allows the internal pressure to escape when it bursts can be provided. Since the blowout panel 110 and the rupture disk are conventionally well-known, detailed description thereof is omitted.

  An operation floor 104a is also provided on the uppermost floor of the turbine building 104, and an opening for releasing internal pressure when an abnormal situation occurs is formed in the wall of the operation floor 104a (not shown). In addition, safety devices such as blowout panels and rupture disks can be provided.

  Further, although not shown, an opening for releasing the internal pressure when an abnormal situation occurs is formed in the wall of the MS tunnel chamber 105, and a safety device such as a rupture disk can be provided. The MS tunnel chamber 105 is also called a main steam pipe tunnel chamber (MSIV chamber).

(Function and arrangement of closing device 1)
When an abnormal situation occurs in the reactor building 102 and the internal pressure exceeds a predetermined level, the blowout panel 110 is removed, or the rupture disk is ruptured and the opening 102b is opened. Similarly, in the turbine building 104 and the MS tunnel chamber 105, when the internal pressure exceeds a predetermined value, the blowout panel 110 is removed or the rupture disk is ruptured and the opening is opened. Thereby, large-scale damage of the reactor building 102, the turbine building 104, and the MS tunnel chamber 105 can be suppressed, but if the blowout panel 110 remains detached or the rupture disk remains ruptured, There is a risk that radioactive materials in the buildings 102 and 104 and the MS tunnel room 105 may continue to leak out of the facility. In contrast, the closing device 1 shown in FIGS. 2 and 3 can be provided in the buildings 102 and 104 and the MS tunnel chamber 105, and the opening 102 b opened when an abnormality occurs can be closed by the closing device 1. Like that. FIG. 2 shows a closed state in which the opening 102b opened when an abnormal situation occurs is closed, and FIG. 3 shows a normal state (open state).

  As shown in FIGS. 2 and 3, the closing device 1 may be provided on the building side of the wall of the reactor building 102 or on the outdoor side of the building. Similarly, when the closing device 1 is provided on the walls of the turbine building 104 and the MS tunnel chamber 105, it may be provided on the inside of the wall or on the outside of the wall. Further, the closing device 1 can be attached to an airtight wall 200 provided on the inner side of the wall of the reactor building 102. As shown in FIG. 3, an opening 201 is formed in the hermetic wall 200 so as to correspond to the opening 102 b formed in the wall of the reactor building 102. Therefore, when the closing device 1 is in the open state, the opening 201 of the hermetic wall 200 and the opening 102b of the wall of the reactor building 102 are opened, so the pressure when an abnormal situation occurs is In addition, it is possible to escape from the opening 201 of the hermetic wall 200 and the opening 102b of the wall of the reactor building 102 to the outside. The hermetic wall 200 may not be a complete wall structure, and may be configured by combining frame-shaped members, for example.

  The closing devices 1 can be provided so as to be arranged in the vertical direction and so as to be arranged in the horizontal direction. As the number of the closing devices 1 is increased, the effective opening area can be increased. The effective opening area can be set to be approximately the same as the opening 102 b of the wall of the reactor building 102. Although it is conceivable to increase the effective opening area by increasing the size of the closing device 1, workability at the time of manufacture, transportation, and installation deteriorates. In this embodiment, these workabilities are not significantly impaired. In this way, a plurality of relatively small closing devices 1 are used and arranged in a state in which they are brought close to each other, thereby obtaining a desired effective opening area. A gap may be provided between adjacent closing devices 1 or may not be provided.

  In particular, a plurality of pipes such as the main steam pipe 106 pass through the wall of the MS tunnel chamber 105, and it is difficult in terms of layout to provide the large closing apparatus 1 on the wall. A plurality of 1 is provided. Thereby, it is possible to obtain the desired effective opening area by laying out the closing device 1 while avoiding the main steam pipe 106 and the like.

  In the following description, the case where the closing device 1 is provided on the wall of the reactor building 102 will be described, but the present invention can also be applied to the turbine building 104 and the MS tunnel chamber 105. In the description of this embodiment, as shown in each drawing, the inside of the reactor building 102 is simply referred to as the inside, the outside of the reactor building 102 is simply referred to as the outside, and the right side when viewed from the inside to the outside. This side is simply called the right side, and the side that turns to the left when going from the inside to the outside is simply called the left side.

(Configuration of closing device 1)
As shown in FIG. 5, the closing device 1 includes a shielding door 10 that closes the opening 102 b of the wall of the reactor building 102, a frame-type frame 20 as a support that supports the shielding door 10, and the shielding door 10. A first hinge 31 and a second hinge 32 supported by the frame frame 20, a driving device 40 for driving the shielding door 10, a control device 50 shown in FIG. 4, an operation switch 51, an open-side limit switch 52, A closing limit switch 53, a locking limit switch 54, an unlocking limit switch 55, an open state holding member 60 (shown in FIGS. 8 and 9), and a closed state holding member 70 are provided.

  The lock-side limit switch 54 is a switch that detects that the first kanuki 11 and the second kanuki 12 are in the locking position. The unlock limit switch 55 is a switch that detects that the first kanuki 11 and the second kanuki 12 are in the non-locking position. When the shielding door 10 changes from the locked state in the open state to the locked state in the closed state, the electric motor 41 is first driven to further press the shielding door 10 in the open position in the opening direction. When a predetermined time (for example, 1 second) elapses after the electric motor 41 starts outputting in the opening direction, the kanuki drive device 13 is driven in the unlocking direction, and the first kanuki 11 and the second kanuki 12 move to the unlocked position. To start. When the unlock limit switch 55 is closed, the pressing of the electric motor 41 in the opening direction is stopped, and the driving of the cannula driving device 13 in the unlocking direction is also stopped. After that, it operates so that the shielding door is closed.

  Further, when the shielding door 10 changes from the locked state in the closed state to the locked state in the opened state, the electric motor 41 is first driven to further press the shielding door 10 in the closed position in the closing direction. . When a predetermined time (for example, 1 second) elapses after the electric motor 41 starts outputting in the closing direction, the kanuki drive device 13 is driven in the unlocking direction, and the first kanuki 11 and the second kanuki 12 move to the unlocked position. To start. When the unlock limit switch 55 is closed, the pressing of the electric motor 41 in the closing direction is stopped, and the driving of the cannula driving device 13 in the unlocking direction is also stopped. After that, it operates so that the shielding door 10 becomes an open state.

  As shown in FIG. 3, the frame-type frame 20 is a member attached to the airtight wall 200. A plurality of openings 201 are formed in the airtight wall 200. Although FIG. 3 shows an example in which six openings 201 are formed in the airtight wall 200, the number and arrangement of the openings 201 are not limited to those shown in FIG. The hermetic wall 200 is provided with a support column 202 extending in the vertical direction and a horizontal partition 203 extending in the horizontal direction in order to define a plurality of openings 201. Openings 201 are formed so as to be aligned in the horizontal direction by the support columns 202, and openings 201 are formed so as to be aligned in the vertical direction by the horizontal partitioning sections 203.

  As shown in FIG. 3, the frame-type frame 20 includes a first frame member 21 extending horizontally along the upper edge of the opening 201 of the hermetic wall 200 and a lower edge of the opening 201 of the hermetic wall 200. A second frame member 22 extending horizontally along the left edge of the opening 201 of the hermetic wall 200, a third frame member 23 extending vertically along the left edge of the opening 201 of the hermetic wall 200, and a right edge of the opening 201 of the hermetic wall 200. And a fourth frame member 24 extending vertically. The upper end portion of the third frame member 23 is connected to the left end portion of the first frame member 21, and the upper end portion of the fourth frame member 24 is connected to the right end portion of the first frame member 21. The lower end of the third frame member 23 is connected to the left end of the second frame member 22, and the lower end of the fourth frame member 24 is connected to the right end of the second frame member 22. As a result, a frame frame 20 having a rectangular frame shape that is long in the vertical direction is configured to correspond to the shape of the shielding door 10. As shown also in FIG. 5, the width of the fourth frame member 24 is set wider than the widths of the first frame member 21, the second frame member 22, and the third frame member 23. The frame-type frame 20 may have a rectangular shape that is long in the left-right direction.

  As shown in FIGS. 7 and 10, a gasket (closing side elastic member) 25 interposed between the frame mold frame 20 and the shielding door 10 is provided on the inner surface of the frame mold frame 20. The gasket 25 is formed in a rectangular shape that extends along the first frame material 21, the third frame material 23, the second frame material 22, and the fourth frame material 24 of the frame-type frame 20. It is continuous over the circumference. The gasket 25 is made of an elastic material such as rubber or thermoplastic elastomer, and is formed in a hollow shape as shown in FIG. The side of the gasket 25 on the frame frame 20 is fixed to the frame frame 20 via a fixing member 26. When the shielding door 10 is in an open state, the shielding door 10 is not in contact with the gasket 25, and the gasket 25 has a shape as indicated by an imaginary line in FIG.

  As shown in FIGS. 2, 3, and 5, the shielding door 10 has a rectangular shape that is long in the vertical direction as a whole, and has an outer shape larger than the inner shape of the frame frame 20. When the shielding door 10 is in a closed state, the entire inner side of the frame frame 20 can be closed by the shielding door 10.

  As shown in FIG. 5, a first hinge 31 and a second hinge 32 are interposed between the shielding door 10 and the fourth frame member 24 of the frame-type frame 20. The first hinge 31 is a member that supports the upper portion of the shielding door 10 from the vertical center portion, and the second hinge 32 is a member that supports the lower portion of the shielding door 10 from the vertical center portion. It is. The number of hinges is not limited to two and may be three or more.

  The first hinge 31 includes a door-side fixing plate 31a fixed to the inner surface side of the shielding door 10, a frame-side fixing plate 31b fixed to the frame-type frame 20, and a vertical direction fixed to the door-side fixing plate 31a. And an extending shaft 31c. In this embodiment, the upper portion of the shaft 31c is fixed so as not to rotate relative to the door-side fixing plate 31a, and the lower portion of the shaft 31c is supported so as to be rotatable relative to the frame-side fixing plate 31b. Has been. The second hinge 32 includes a door-side fixing plate 32a fixed to the inner surface side of the shielding door 10, a frame-side fixing plate 32b fixed to the frame-type frame 20, and a vertical direction fixed to the door-side fixing plate 32a. And an extending shaft 32c. In this embodiment, the lower portion of the shaft 32c is fixed so as not to rotate relative to the door-side fixing plate 32a, and the upper portion of the shaft 32c is supported to be rotatable relative to the frame-side fixing plate 32b. Has been. The lower part of the shaft 32c is formed so as to protrude downward from the door-side fixing plate 32a. The first hinge 31 and the second hinge 32 can be switched between a closed state in which the shielding door 10 is rotatably supported around the shafts 31c and 32c and the opening 102b is closed, and an open state in which the opening 102b is opened. It has become. The structure of the first hinge 31 and the second hinge 32 described above is an example, and any structure hinge may be used, but the upper hinge axis and the lower hinge axis are opposite to each other. By adopting the protruding structure, for example, the shielding door 10 can be prevented from moving in the vertical direction with respect to the frame frame 20 at the time of an earthquake, and the earthquake resistance can be improved.

  As shown in FIG. 11, a protrusion 16 that abuts against the intermediate portion in the width direction of the gasket 25 when the shielding door 10 is in a closed state is provided on the peripheral edge of the shielding door 10. The protruding portion 16 protrudes from the outer surface of the shielding door 10 in a direction approaching the frame-type frame 20, and extends in a continuous annular shape along the peripheral edge of the shielding door 10. As shown in FIG. 12, the protruding amount of the protruding portion 16 is such that when the shielding door 100 is closed, the gasket 25 can be elastically deformed to be brought into close contact with the distal end portion of the protruding portion 16, and In this state, the gasket 25 is set not to cause bottoming. The contact surface pressure is increased by the tip portion of the protruding portion 16 coming into contact with the intermediate portion in the width direction of the gasket 25, thereby improving the sealing performance. When the shielding door 10 is in a closed state and the protrusion 16 is in contact with the gasket 25, the gasket 25 exerts a repulsive force in the opening direction on the shielding door 10 in the closed state. Further, although not shown, a gasket may be provided on the shielding door 10 and a protrusion may be provided on the frame frame 20.

  As shown in FIG. 5 and the like, the shielding door 10 is provided with a first kanuki 11 and a second kanuki 12. The first cannula 11 is supported so as to be movable in the vertical direction with respect to the part of the shielding door 10 away from the first hinge 31, and the locking position protruding upward from the upper end of the shielding door 10, It is possible to switch to the non-locking position located below the upper end. The second cannula 12 is supported so as to be movable in the vertical direction with respect to the part of the shielding door 10 away from the second hinge 32, and the locking position protruding downward from the lower end of the shielding door 10, It can be switched to a non-locking position located above the lower end.

  The shield door 10 is provided with a kanuki drive device 13 that drives the first kanuki 11 and the second kanuki 12. The cannula drive device 13 is composed of, for example, an electric motor and a well-known cam mechanism that converts the rotary motion of the electric motor into a linear motion in the vertical direction, and the first motor is rotated by a predetermined amount in a predetermined direction. The first kanuki 11 and the second kanuki 12 can be set to the locking position, and the first kanuki 11 and the second kanuki 12 in the locking position can be set to the non-locking position by reversing the electric motor. it can. The cannula driving device 13 can also be configured by, for example, a linear actuator or a ball screw mechanism.

  The first cannula 11, the second cannula 12, and the cannula driving device 13 constitute a second lock device that locks the shield door 10 in the closed state, and the first lock device that locks the shield door 10 in the open state. Is configured. The locking device that locks the shielding door 10 in the closed state and the locking device that locks the shielding door 10 in the open state may be the same or may be configured separately. Since the closed state and the open state can be locked by the same first cannula 11 and second cannula 12, the structure can be simplified as compared with the case where separate cannulas are provided.

  The first frame member 21 and the second frame member 22 of the frame type frame 20 are each provided with a closed state holding member 70. The closed state holding member 70 of the first frame material 21 is disposed immediately above the first cannula 11 of the shielding door 10 in the closed state, and when the first cannula 11 protrudes upward and enters the locking position. Has a kanuki insertion hole 70a to be inserted. The first cannula 11 is engaged with the closed state holding member 70 of the first frame member 21 by the first cannula 11 being inserted into the cannula insertion hole 70 a from below. Further, the closed state holding member 70 of the second frame member 22 is disposed immediately below the second kanuki 12 of the shielding door 10 in the closed state, and the second kanuki 12 protrudes downward to be in the locking position. It has a kanuki insertion hole 70a to be inserted. The second cannula 12 is engaged with the closed state holding member 70 of the second frame member 22 by being inserted into the cannula insertion hole 70 a from above. When the first cannula 11 and the second cannula 12 are engaged with the closed state holding member 70 of the first frame member 21 and the closed state holding member 70 of the second frame member 22, the shielding door 10 is held in the closed state. .

  On the other hand, as shown in FIG. 8, transverse members 210, 210 extending inward are provided on the airtight wall 200 so as to be spaced apart from each other in the vertical direction so as to correspond to the height dimension of the closing device 1. The inner ends of the horizontal members 210 and 210 are fixed to a vertical member 211 that is disposed away from the airtight wall 200 inward. Further, the inner ends of the lateral members 210 and 210 are connected by a connecting member 212 extending in the vertical direction.

  An open state holding member 60 is provided in each of the upper and lower lateral members 210 and 210. The open state holding member 60 of the upper lateral member 210 is disposed immediately above the first cannula 11 of the shielding door 10 in the open state, and when the first cannula 11 protrudes upward and enters the locking position. It has a kanuki insertion hole 60a to be inserted into. The first cannula 11 is inserted into the cannula insertion hole 60a from below, so that the first cannula 11 is locked to the open state holding member 60 of the upper lateral member 210. In addition, the open state holding member 60 of the lower lateral member 210 is disposed immediately below the second cannula 12 of the shielding door 10 in the open state, and the second cannula 12 protrudes downward to the locking position. It has a kanuki insertion hole 60a to be inserted when it becomes. The second cannula 12 is inserted into the cannula insertion hole 60a from above, so that the second cannula 12 is locked to the open state holding member 60 of the lower lateral member 210. When the first cannula 11 and the second cannula 12 are engaged with the open state holding members 60 on the upper side and the lower side, the shielding door 10 is held in the open state.

  As shown in FIG. 5, an open side limit switch 52 and a closing side limit switch 53 are provided on the upper portion of the shielding door 10. The open-side limit switch 52 is provided on the side closer to the first hinge 31 than the first kanuki 11, and has a first rod-shaped portion 52 a that is disposed so as to protrude upward from the upper end portion of the shielding door 10. ing. The first rod-like portion 52a is provided so as to be movable in the vertical direction with respect to the main body of the open-side limit switch 52, and is constantly biased upward by a biasing member such as a spring (not shown) and protrudes upward. Is to be maintained. Moreover, the closing side limit switch 53 is provided on the side far from the first hinge 31, and has a second rod-shaped portion 53 a that is disposed so as to protrude upward from the upper end portion of the shielding door 10. The second rod-like portion 53a is always urged upward by the urging member in the same manner as the first rod-like portion 52a.

  The first frame member 21 of the frame-type frame 20 is provided with a closing side contact member 71. The closing side abutting member 71 is disposed immediately above the closing side limit switch 53 of the shielding door 10 in the closed state, and comes into contact with the second bar-shaped portion 53a of the closing-side limit switch 53 so as to contact the second bar-shaped portion. It is a member for pushing 53a downward. Therefore, when the shielding door 10 is in the closed state, the second rod-shaped portion 53a of the closing side limit switch 53 comes into contact with the closing side contact member 71 and is pushed downward, thereby closing the closing side limit switch 53. On the other hand, when the shielding door 10 is in the open state, the second rod-like portion 53a moves upward and the closing side limit switch 53 is opened. The opening / closing of the closing side limit switch 53 may be reversed.

An interlock function that operates as follows can also be provided. For example, when all of the following conditions are satisfied, the operation of locking the shielding door 10 in the open state can be started. When each switch operation is performed in a state where the following conditions are not satisfied, a buzzer or the like is sounded although not shown.
Condition 1: Open-side limit switch 52 is OFF or lock-side limit switch 54 is OFF
Condition 2: The electric motor 41 is stopped. Condition 3: The kanuki drive device 13 is stopped. When all of the following conditions are satisfied, the operation of locking the shielding door 10 in the closed state can be started. If each switch is operated without satisfying the following conditions, a buzzer will sound to notify you.
Condition 1: Close limit switch 53 is OFF or lock limit switch 54 is OFF
Condition 2: The electric motor 41 is stopped. Condition 3: The kanuki drive device 13 is stopped. As shown in FIG. 8, the open side contact member 61 is provided on the lateral member 210 on the upper side of the hermetic wall 200. The opening-side contact member 61 is disposed immediately above the opening-side limit switch 52 of the shielding door 10 in the opened state, and contacts the first rod-shaped portion 52a of the opening-side limit switch 52 so that the first rod-shaped portion. It is a member for pushing 52a downward. Therefore, when the shielding door 10 is in the open state, the first rod-like portion 52a of the open-side limit switch 52 comes into contact with the open-side contact member 61 and is pushed downward, whereby the open-side limit switch 52 is closed. On the other hand, when the shielding door 10 is in the closed state, the first rod-shaped portion 52a moves upward and the open-side limit switch 52 is opened. The opening / closing of the open-side limit switch 52 may be reversed.

  The open side limit switch 52 and the close side limit switch 53 are open / closed state detection units that detect the open / closed state of the shielding door 10. Although not shown, the open / close state detection unit may be configured by a sensor other than the limit switch. Moreover, the location of the open / closed state detection unit is not limited to the upper side of the shielding door 10, but may be the lower side or the middle part in the vertical direction. Moreover, you may provide an opening-and-closing state detection part in hinge 31 and 32 grade | etc.,.

  As shown in FIG. 5, an opening-side elastic member 18 for applying a repulsive force in the closing direction to the shielding door 10 in the open state is provided on the side of the shielding door 10 away from the hinges 31 and 32. It has been. The opening-side elastic members 18 are respectively disposed on the upper end portion and the lower end portion of the inner surface of the shielding door 10 and are formed so as to protrude from the inner surface. Examples of the material constituting the open-side elastic member 18 include rubber, thermoplastic elastomer, and spring. As shown in phantom lines in FIG. 7, when the shielding door 10 is in the open state, the protruding end of the opening-side elastic member 18 abuts against the lateral member 210 of the hermetic wall 200, thereby opening the shielding door in the open state. 10 acts to apply a repulsive force in the closing direction.

  As shown in FIG. 5, on the inner surface side of the shielding door 10, a main body portion of the opening side limit switch 52 and the closing side limit switch 53 and a storage box 14 for storing the kanuki drive device 13 are provided. As shown in FIG. 10, the storage box 14 is provided so as to reach the lower end portion from the upper end portion of the shielding door 10. Although not shown in FIG. 10, the storage box 14 is formed so as to be able to store the first kanuki 11 and the second kanuki 12 in the non-locking position. As shown in FIG. 10, the storage box 14 is provided on the side of the shielding door 10 away from the first hinge 31 and the second hinge 32. Inside the housing box 14, a heat insulating material 14 a is disposed so as to cover the inner surface of the housing box 14. The heat insulating material 14a is disposed so as to come into contact with the side wall portion of the storage box 14 and the wall located inside. The heat insulating material 14a is made of conventionally known glass wool or the like. Thereby, it becomes possible to protect the main body part of the open side limit switch 52 and the close side limit switch 53 and the cannula driving device 13 from heat. In addition, an oil seal may be attached to the shaft penetration part of the first kanuki 11, the second kanuki 12, the first rod-like part 52 a, the second rod-like part 53 a and the shaft penetration part of the output shaft 43 a of the storage box 4 in the storage box 14. it can. Thereby, an electrical component can be protected from heat and moisture.

  As shown in FIG. 10, the storage box 14 is provided with a lid member 14 b that closes the emergency opening. The lid member 14b is normally attached to the storage box 14, but for example, when the kanuki drive device 13 stops operating, the lid member 14b can be removed to open the emergency opening. For example, it is possible to operate the cannula drive device 13 by inserting a tool or the like into the storage box 14 from the emergency opening.

(Configuration of the driving device 40)
The drive device 40 is for driving the shielding door 10 around the shafts 31c and 32c of the first hinge 31 and the second hinge 32, and as shown in FIG. 5, an electric motor 41 constituting a rotational force generator. And a reduction gear 42, a torque limiter 43 to which the output of the reduction gear 42 is input, and a storage box 47 for storing them. The storage box 47 is disposed on the right side of the shielding door 10, and in this embodiment, the storage box 47 is positioned adjacent to the right side of the fourth frame member 24 of the frame-type frame 20. The storage box 47 has a shape that is long in the vertical direction. The upper end portion of the storage box 47 is the upper end portion of the driving device 40, and is positioned lower than the central portion in the vertical direction of the shielding door 10. As a result, the driving device 40 is disposed on the side of the shielding door 10 below the center of the shielding door 10 in the vertical direction.

  The electric motor 41 has a posture in which the rotation shaft extends in the vertical direction, and is disposed on the upper side in the storage box 47. The reduction gear 42 is a conventionally known gear reduction gear. The rotation shaft has a posture in which the rotation shaft extends in the vertical direction, and is arranged in the vertical middle portion in the storage box 47, that is, below the electric motor 41. The rotational force of the electric motor 41 is input to the speed reducer 42 and output from the speed reducer 42. The torque limiter 43 is conventionally known, and is configured to mechanically cut off the transmission of torque when a predetermined or higher torque is applied. The structure of the torque limiter 43 is not particularly limited, and various torque limiters can be used.

  The torque limiter 43 is disposed below the storage box 47, that is, below the speed reducer 42. The output shaft of the speed reducer 42 is connected to the input side of the torque limiter 43. An output shaft 43 a is connected to the output side of the torque limiter 43. The output shaft 43 a protrudes downward from the lower wall of the storage box 47. A drive sprocket 44 is fixed to the lower end portion of the output shaft 43a. A driven sprocket 45 is fixed to the lower end of the shaft 32 c of the second hinge 32. The drive sprocket 44 and the driven sprocket 45 are arranged at the same height. A transmission chain (transmission member) 46 composed of a roller chain or the like is wound around the drive sprocket 44 and the driven sprocket 45. The output shaft 43 a, the drive sprocket 44, the driven sprocket 45, and the transmission chain 46 are members that constitute the drive device 40.

  Accordingly, the rotational force of the electric motor 41 is increased by the speed reducer 42 and then input to the torque limiter 43. The rotational force output from the torque limiter 43 acts to rotate the drive sprocket 44 via the output shaft 43a. To do. When the drive sprocket 44 rotates, the driven sprocket 45 rotates via the transmission chain 46, and the rotational force of the driven sprocket 45 is transmitted to the shaft 32c of the second hinge 32. Since the shaft 32c is fixed to the door-side fixing plate 32a, the shielding door 10 can be rotated by the rotational force of the shaft 32c. The rotation direction of the shielding door 10 can be changed by switching the rotation direction of the electric motor 41.

  As shown in FIGS. 10 and 12, a heat insulating material 47 a is disposed inside the storage box 47. The heat insulating material 47 a is configured in the same manner as the heat insulating material 14 a of the storage box 14, and is disposed so as to contact the side wall portion of the storage box 47 and the wall located inside. As a result, the electric motor 41, the speed reducer 42, and the torque limiter 43 can be protected from heat. The heat insulating material 47 a is also a member constituting the driving device 40. 10 and 12, the electric motor 41, the speed reducer 42, and the torque limiter 43 are omitted.

(Configuration of control device 50)
The control device 50 shown in FIG. 4 is for controlling the electric motor 41 and the kanuki drive device 13 of the drive device 40. An operation switch 51, an open side limit switch 52, and a close side limit switch 53 are connected to the control device 50. The operation switch 51 is a switch for opening and closing the shielding door 10. However, the operation switch 51 is not limited to this. The operation switch 51 can receive any trigger signal and can open the shielding door 10 by receiving a predetermined trigger signal, or can be closed. You may be allowed to select whether or not. Further, the control device 50 can determine whether the shielding door 10 is in the open state or the closed state by detecting the open / closed state of the open side limit switch 52 and the close side limit switch 53.

  When the control device 50 detects the operation of the operation switch 51 and closes the shield door 10 in the open state, the kanuki drive device 13 is operated to unlock the first kanuki 11 and the second kanuki 12. After the position, the rotation control in the closing direction is performed on the electric motor 41 of the driving device 40. Thereby, the shielding door 10 is rotated in the closing direction, and the closing side limit switch 53 is eventually closed by the closing side contact member 71.

  The closing side limit switch 53 is closed when the shielding door 10 is in a closed state, and therefore the control device 50 detects when the shielding door 10 is in the closed state by the closing side limit switch 53. Can do. For example, the drive device 40 is controlled to operate in the direction in which the shielding door 10 is closed, and the locking device 13 is activated after a predetermined time has elapsed since the closing side limit switch 53 detects that the shielding door 10 has been closed. Can be made. This can be done with the second controller. For example, the control device 50 can operate the drive device 40 until the lock-side limit switch 54 is closed after the shielding door 10 is closed, so that the shielding door 10 is kept closed. However, the kanuki drive device 13 can be operated after a predetermined time has elapsed. Accordingly, the driving device 40 can be operated until the shielding door 10 is closed and the lock-side limit switch 54 is closed, and the cannula driving device 13 is operated while the shielding door 10 is securely pressed against the closing-side elastic member 25. Can be operated. When the shielding door 10 is closed, the torque limiter 42 is interposed between the electric motor 41 and the rotation of the electric motor 41 is allowed by the action of the torque limiter 42. While the electric motor 41 rotates, the shielding door 10 is pressed against the gasket 25.

  When a predetermined time (for example, 2 seconds) elapses after detection of the closing limit switch 53, the cannula driving device 13 is operated so that the first cannula 11 and the second cannula 12 are brought into the locked positions. That is, by continuously applying a force in the closing direction by the driving device 40 to the shielding door 10 in the closed state for a predetermined time, the shielding door 10 is surely closed, and then the first kanuki 11 and the second By setting the cannula 12 to the locking position, the shielding door 10 is securely locked in the closed state.

  In addition, when the control device 50 detects the operation of the operation switch 51 and opens the closed door 10 in the closed state, the kanuki drive device 13 is operated to turn off the first kanuki 11 and the second kanuki 12. After the locking position, the rotation control in the opening direction is performed on the electric motor 41 of the driving device 40. Thereby, the shielding door 10 rotates in the opening direction, and the opening limit switch 52 is eventually closed by the opening contact member 61.

  The opening side limit switch 52 is closed when the shielding door 10 is in the open state. Therefore, the control device 50 detects when the shielding door 10 is in the opening state by the opening side limit switch 52. Can do. For example, control is performed to operate the driving device 40 in the direction to open the shielding door 10, and the locking device 13 is activated after a predetermined time has elapsed since the opening side limit switch 52 detects that the shielding door 10 has been opened. Can be made. This can be done with the first controller. You may comprise by one control apparatus, without dividing into the said 1st control apparatus and 2nd control apparatus. For example, the control device 50 operates the drive device 40 until the lock-side limit switch 54 is closed after the shielding door 10 is opened, so that the shielding door is kept open. The kanuki drive device 13 can be operated after a predetermined time has elapsed. Accordingly, the driving device 40 can be operated until the shielding door 10 is opened and the lock-side limit switch 54 is closed, and the cannula driving device 13 is operated while the shielding door 10 is securely pressed against the opening-side elastic member 18. Can be operated. When the shielding door 10 is opened, the torque limiter 42 is interposed between the electric motor 41 and the rotation of the electric motor 41 is allowed by the action of the torque limiter 42. While the electric motor 41 rotates, the opening-side elastic member 18 of the shielding door 10 is pressed against the transverse member 210 of the airtight wall 200.

  When a predetermined time (for example, 2 seconds) elapses after the detection by the open-side limit switch 52, the kanuki drive device 13 is operated so that the first kanuki 11 and the second kanuki 12 are brought into the locked positions. That is, by continuously applying force in the closing direction by the driving device 40 to the shielding door 10 in the open state for a predetermined time, the shielding door 10 is surely opened, and then the first cannula 11 and the second By setting the cannula 12 to the locking position, the shielding door 10 is reliably locked in the open state.

(Layout of closing device 1)
As shown in FIG. 6, when two closing devices 1 arranged so as to be adjacent to each other in the horizontal direction are viewed, the left and right closing devices 1 are inverted with respect to the left closing device 1 as a reference. Can be used as the closing device 1 on the right side. In the closing device 1 on the left side of FIG. 6, the first frame member 21 of the frame-type frame 20 is located above, the second frame member 22 is located below, the third frame member 23 is located on the left, and the fourth frame member 24 is located on the right. On the other hand, the opening / closing device 1 on the right side of FIG. 6 is inverted so that the first frame material 21 of the frame-type frame 20 is down, the second frame material 22 is up, and the third frame material 23 is Are arranged so that the fourth frame member 24 is located on the right and the fourth frame member 24 on the left. The left closing device 1 and the right closing device 1 shown in FIG. 6 can constitute one opening closing unit.

  As shown in FIG. 5, the driving device 40 of the closing device 1 is disposed on the right side of the shielding door 10 and below the central portion in the vertical direction of the shielding door 10. Is a space that can become a dead space S. As shown in FIG. 6, the driving device 40 of the right closing device 1 can be moved up and down of the shielding door 10 on the left side of the shielding door 10 by using the closing device 1 inverted upside down as the right closing device 1. It will be arranged above the center of the direction. Accordingly, since the drive device 40 of the right closing device 1 can be disposed above the drive device 40 of the left closing device 1, the dead space S can be effectively used to close the left closing device 1 and the right closing device. The device 1 can be arranged close to the left-right direction.

  Further, since the drive device 40 of the right closing device 1 has the drive sprocket 44, the driven sprocket 45, and the transmission chain 46 above the drive device 40, it does not interfere with the drive device 40 of the left closing device 1. .

(Effect of embodiment)
As described above, according to the closing device 1 according to this embodiment, the shielding door 10 is pivotally supported by the frame-like frame 20 by the shafts 31c and 32c, so that the opening state is normally set. Sometimes, it is possible to ensure a wide effective opening area so as not to block the opening 102a located next to the closing device 1.

  Further, since the shafts 31c and 32c that support the shielding door 10 extend in the vertical direction, even if a large load is applied in the vertical direction, the direction of the load is in the axial direction. Thereby, the shielding door 10 can be held in an open state without a large structure as compared with the case of acting around the axis. Therefore, the structure for holding the shielding door 10 in an open state becomes compact, and it is difficult to disturb the internal pressure when the abnormal situation occurs. Further, when in the open state, the shielding door 10 stands by at a position perpendicular to the frame-type frame 20, so that it is possible not to receive pressure during an abnormal situation directly.

  Further, when the blowout panel 110 is removed due to an abnormal situation or when the rupture disk is ruptured, the drive device 40 can turn the shielding door 10 around the shafts 31c and 32c to be closed. become. Thereby, it is suppressed that the radioactive substance etc. which exist in the buildings 102 and 104 leak out of the facility.

  Also, as shown in FIG. 6, the total opening area can be increased by preparing a plurality of closing devices 1 and disposing them close to each other in the horizontal direction. In this case, since the driving device 40 is located below the central portion of the shielding door 10 in the vertical direction on the side of the shielding door 10, by turning the closing device 1 arranged next to it upside down, The driving device 40 is positioned on the side of the shielding door 10 above the center of the shielding door 10 in the vertical direction. Therefore, it becomes possible to arrange the drive devices 40 of the adjacent closing devices 1 side by side in the vertical direction, so that the dead space S is reduced and a large effective opening area is secured. As a result, a layout in which the internal pressure of the buildings 102 and 104 when an abnormal situation occurs can be easily released.

  Moreover, you may comprise so that the drive device 40 may be located above the center part of the up-down direction of the said shielding door 10 in the side of the shielding door 10. FIG. In this case, by turning the closing device 1 arranged next to it upside down, the driving device 40 is positioned below the center of the shielding door 10 in the vertical direction on the side of the shielding door 10. Therefore, the driving device 40 can be arranged side by side in the vertical direction.

  In addition, when the shielding door 10 is in the closed state, the shielding door 10 is locked by the first kanuki 11 and the second kanuki 12. At this time, since the repulsive force acts on the shielding door 10 in the opening direction by the gasket 25, for example, the shaking and backlash of the shielding door 10 are suppressed with respect to the rolling of the earthquake. Further, when the shielding door 10 is opened and the shielding door 10 is locked by the first cannula 11 and the second cannula 12, a repulsive force acts on the shielding door 10 in the closing direction by the opening-side elastic member 18. Therefore, the shaking and backlash of the shielding door 10 are similarly suppressed.

  Further, the output of the electric motor 41 is input to the shafts 31c and 32c of the hinges 31 and 32 through the torque limiter 43, thereby rotating the shielding door 10 from the closed state to the open state and vice versa. Can do. When the shielding door 10 is closed or opened, the shielding door 10 is pressed against another member. At this time, the torque limiter 43 is interposed between the electric motor 41 and the shielding door 10. By interposing, it is possible to prevent each part from being overloaded.

  Further, for example, when the shielding door 10 tries to rotate around the shafts 31c and 32c due to the rolling at the time of an earthquake, an unreasonable force is applied to the drive device 40 from the output side. The force applied to each part is reduced by the torque limiter 43.

  The above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  As described above, the nuclear power generation facility closure device 1 according to the present invention can be installed in, for example, a reactor building or an MS tunnel room.

DESCRIPTION OF SYMBOLS 1 Nuclear power generation facility closing device 10 Shielding door 20 Frame-type frame 11 1st kanuki 12 2nd kanuki 13 kanuki drive device 16 ridge 18 Opening side elastic member 25 Gasket (closing side elastic member)
31 first hinge 31c shaft 32 second hinge 32c shaft 40 drive device 41 electric motor 43 torque limiter 43a output shaft 44 drive sprocket 45 driven sprocket 46 transmission chain (transmission member)
47 Storage Box 47a Heat Insulating Material 50 Control Device 102b Opening 110 Blowout Panel

Claims (10)

In a nuclear power generation facility closing device that closes an opening formed in a wall when a blowout panel or a rupture disk provided on a wall constituting the nuclear power facility is opened,
A shielding door that closes the opening;
A support for supporting the shielding door;
A closed state that has an axis that is interposed between the shielding door and the support and extends in the vertical direction and supports the shielding door so as to be rotatable around the axis, and closes the opening. A hinge that switches to an open state that opens,
A rotational force that is disposed on the side of the shielding door below or above the central portion in the vertical direction of the shielding door and has an output shaft that drives the shielding door around the axis and rotates the output shaft. and a drive device having a rotating force generator for generating a,
The said output shaft is arrange | positioned in parallel with the said axis | shaft of the said hinge, The closure apparatus for nuclear power generation facilities characterized by the above-mentioned . The closure device for a nuclear power plant according to claim 1,
An open-side elastic member that applies a repulsive force in the closing direction to the shielding door in the open state;
And a first locking device that locks the shielding door in an open state. In the closing device for nuclear power generation facilities of Claim 1 or 2,
A closing-side elastic member for applying a repulsive force in the opening direction to the shielding door in the closed state;
And a second locking device that locks the shielding door in the closed state. In the nuclear power generation facility closure device according to claim 3,
The support is composed of a frame-shaped frame formed in a frame shape corresponding to the shielding door,
The closing device for a nuclear power generation facility, wherein the closing-side elastic member is a gasket formed so as to extend along the frame-shaped frame and interposed between the frame-shaped frame and the shielding door. The closure device for a nuclear power plant according to claim 4,
The gasket is attached to one of the frame-type frame and the shielding door,
The other of the frame-type frame and the shielding door is provided with a protrusion that contacts the intermediate portion in the width direction of the gasket so as to protrude toward the one. apparatus. In the closing device for nuclear power generation facilities as described in any one of Claim 1 to 5,
The driving device is characterized in that it comprises a torque limiter the output of the rotational force generator is input, and a transmission member for transmitting the rotational force output from the torque limiter in the axis of the hinge Closing device for nuclear power generation facilities. The closure device for a nuclear power plant according to claim 6,
A first control device that controls the drive device and a first lock device that locks the shielding door in the open state;
The first control device controls the driving device until the shielding door is opened, and controls the first locking device after a predetermined time has elapsed after the shielding door is opened. A closing device for a nuclear power generation facility, which is configured to perform the following. In the closing device for nuclear power generation facilities of Claim 6 or 7,
A second control device that controls the drive device and a second lock device that locks the shielding door in the closed state;
The second control device controls the drive device until the shielding door is closed, and controls the second lock device after a predetermined time has elapsed after the shielding door is closed. A closing device for a nuclear power generation facility, which is configured to perform the following. In the closing device for nuclear power generation facilities as described in any one of Claim 1 to 8,
The said drive device is provided with the storage box which accommodates the said rotational force generator, and the heat insulating material arrange | positioned inside the said storage box, The closure apparatus for nuclear power generation facilities characterized by the above-mentioned. In the closing device for nuclear power generation facilities as described in any one of Claim 1 to 9,
The output shaft is disposed so as to protrude in the vertical direction,
The driving device, characterized by comprising a drive sprocket fixed to said output shaft, a driven sprocket fixed to said shaft of said hinge, and a transmission member which is wound around the drive sprocket and the driven sprocket A closure device for nuclear power generation facilities.

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