JP7388960B2 - Opening device and opening closing system - Google Patents

Description

The present invention relates to an opening opening/closing device and an opening opening/closing system.

A safety device has been developed that, in the unlikely event that an existing blowout panel on the reactor building wall opens due to high-pressure steam inside the building, the opening will be closed to ensure airtightness of the reactor building.
As such a safety device, there is Japanese Patent No. 6430055 (Patent Document 1). This bulletin states, ``A shield that is provided in an open position that does not overlap with a blowout panel that blocks an opening in a building, and that can be slid to a closed position so as to close the opening after the blowout panel is opened. A door, an upper frame part having an upper holder for suspending the upper part of the shielding door by an arm movable back and forth and supporting it by an upper rail, and holding the shielding door in a closed position, and a lower part of the shielding door. a lower frame part supported by a lower rail and having a lower holder for holding down the shielding door when it is in the closed position; and a side holder for holding the side part of the shielding door and holding the shielding door when it is in the closed position. and a sealing material attached to surround the opening and sealing a gap between the shielding door and the opening when the shielding door is in a closed position, and the shielding door An upper guide is provided so as to sandwich the rail, a lower guide is provided so as to sandwich the lower rail, and further so as to be pressed against the sealing material by the upper and lower pressers and the side pressers when the rail is in the closed position. A top and bottom cam and a side cam are provided, and the top and bottom rails are provided with a notch so that the top and bottom guides can be removed when the shielding door suspended from the arm is pressed against the sealing material. (See claims).

Patent No. 6430055

Nuclear power buildings have a forced opening mechanism that, in the unlikely event that the blowout panel opens due to high-pressure steam inside the building, opens the blowout panel completely and moves it to a position where it does not interfere with the closing of shielding objects such as shielding doors. is provided.
However, when the forced opening mechanism is not activated, some of the members of the forced opening mechanism exist in positions that obstruct the closing operation of the shield, resulting in the problem that the shield cannot be closed. There is.

Therefore, the present invention aims to provide an opening opening/closing device and an opening opening/closing system that can reliably prevent a part of the members of the forced opening mechanism from becoming an obstacle for the closing operation of the shield. Take it as a challenge.

In order to solve the above problems, the present invention provides a blowout panel that is fastened with a fastener to close an opening in a building, and in which the fastener comes off and opens the opening when the internal pressure of the building increases. , a closing device having a shield that moves along the outer wall of the building and closing the opening opened by moving the shield with the shield, and a closing device connected to the blowout panel by a connecting member. and a forced opening mechanism that pulls the blowout panel via the connecting member to move the blowout panel to the outside beyond a position where the shielding door passes, and detects opening and closing of the blowout panel. a first detection section; a second detection section that detects that the blowout panel and the connecting member have been moved to the outside beyond a position where the shield passes due to the operation of the forced opening mechanism; a first control unit that controls to move the blowout panel and the connecting member to the outside beyond a position where the shield passes; and a first detection unit that detects opening of the blowout panel; On the condition that the second detection unit detects that the blowout panel and the connecting member have moved to the outside beyond the position where the shield passes, the closing device is controlled to move the shield. a second control section that closes the opened opening with the shield, and the first control section controls the forced opening mechanism to inhibit movement of the shield before the operation thereof. After the blowout panel is moved, the connecting member, which was in a position where the blowout panel is moved, is guided to a position where it does not inhibit movement of the shield and is restrained at that position.

According to the present invention, it is possible to provide an opening opening/closing device and an opening opening/closing system that can reliably prevent a part of the member of the forced opening mechanism from becoming an obstacle for the closing operation of the shielding door. can.
Problems, configurations, and effects other than those described above will be made clear by the following description of the embodiments.

FIG. 1 is a sectional view of an opening/closing device provided at an opening of a nuclear reactor building, which is an embodiment of the present invention. FIG. 2 is a front view of a closing device in an opening opening/closing device that is an embodiment of the present invention. FIG. 2 is an enlarged view of a lock pin and a lock block in an opening opening/closing device according to an embodiment of the present invention. FIG. 1 is a functional block diagram of a control system of an opening opening/closing system that is an embodiment of the present invention. It is a flowchart which shows the content of the control which an opening opening/closing control part performs when closing a shielding door with the closing device in the opening opening/closing device which is one Example of this invention. It is a flowchart which shows the content of the control which an opening opening/closing control part performs when performing the operation|movement of opening a shielding door with the closing device in the opening opening/closing apparatus which is one Example of this invention. It is a timing chart explaining operation of a closing device and a forced opening mechanism in a first opening opening/closing device that is an example of the present invention. It is a timing chart explaining the operation of the closing device and the forced opening mechanism in the second opening opening/closing device which is one example of the present invention. It is a timing chart explaining operation of a closing device and a forced opening mechanism in a third opening opening/closing device that is an example of the present invention. It is a timing chart explaining the operation|movement of the closing device and forced opening mechanism in the 4th opening opening/closing device which is one Example of this invention.

Embodiments of the present invention will be described below with reference to the drawings.
First, the configuration of the opening/closing device 50 will be explained. FIG. 1 is a sectional view of an opening opening/closing device 50 provided at an opening of a nuclear reactor building. An outer wall 100 of the reactor building is provided with an opening 101 that opens to the outside. This opening 101 includes a blowout panel 1 that is fastened to the opening 101 by clips 11 serving as fasteners. As a result, the blowout panel 1 normally closes the opening 101. Then, when the internal pressure of the reactor building rises, the clip 11 comes off due to the pressure, the blowout panel 1 opens, and the pressure and hydrogen inside the reactor building are released.

The outside of the outer wall 100 of the reactor building has a shielding door 21 (shielding body) that slides along the outer wall 100, and an opening 101 that is opened by sliding the shielding door 21 using a predetermined mechanism. A closing device 2 for closing the door with a shielding door 21 is provided.

FIG. 2 is a front view of the closure device 2. The shielding door 21 of the closing device 2 can be slid horizontally, for example. In FIG. 2, the position of the shielding door 21 indicated by the solid line is the open position 71 of the shielding door 21. The open position 71 is a position where, when the blowout panel 1 is opened as described above, the opening 101 can be maintained in an open state and a bar, which will be described later, can be fixed by hooking onto the shielding door 21. In FIG. 2, the position of the shielding door 21 indicated by the two-dot chain line is the closed position 72 of the shielding door 21. The closed position 72 is a position where, when the blowout panel 1 is opened as described above, the opening 101 is completely closed and a bar, which will be described later, can be applied to the shielding door 21. That is, when the shielding door 21 is in the closed position 72, the shielding door 21 covers the opening 101 and closes the opening 101.

The motor M1 is a motor that serves as a drive source for sliding movement of the shielding door 21. The closing device 2 includes a locking mechanism 22 that bolts the shielding door 21 so that the shielding door 21 does not move in the open position 71. The closing device 2 also includes a locking mechanism 23 that bolts the shielding door 21 so that the shielding door 21 does not move in the closed position 72. The lower ends of the lock mechanisms 22 and 23 are each firmly fixed at a predetermined position. The bolt mechanism 22 and the bolt mechanism 23 have basically the same configuration. That is, the bolt mechanisms 22 and 23 use the motors M2 and M3 as drive sources to drive the power cylinders 22b and 23b, thereby raising and lowering the shaft-shaped lifting members 22c and 23c whose longitudinal direction is in the vertical up-down direction. Support members 22d and 23d protrude toward the shielding door 21 from the top and middle heights of the elevating members 22c and 23c, respectively. From the lower part of each support member 22d, 23d, bolt pins 22e, 23e extend with their tips directed vertically downward. Lock blocks 21a and 21b are provided on the left and right side edges of the shielding door 21, respectively. The bar blocks 21a and 21b are provided at a relatively high position and a relatively low position on the left and right side edges of the shielding door 21, respectively. By lowering the elevating members 22c and 23c, the bolt can be bolted by inserting the bolt pins 22e and 23e into holes (not shown in FIG. 2) of the bolt blocks 21a and 21b. In addition, by raising the elevating members 22c, 23c from this state, the bolts can be released by pulling out the bolt pins 22e, 23e from the holes (not shown in FIG. 2) of the bolt blocks 21a, 21b. In this way, the bolt mechanisms 22 and 23 can each be bolted at two locations, upper and lower.

By the way, as shown in FIG. 1, the wire 31 and the chain 32, which serve as connecting members, are located at a position where they become an obstacle when closing the shielding door 21 before the forced opening mechanism 3 is driven. Further, even when the blowout panel 1 comes off due to an increase in the internal pressure in the reactor building, the blowout panel 1 may be located in a position that will become an obstacle when closing the shielding door 21. Therefore, it is desired to move these members to a position where they do not interfere with the sliding movement of the shielding door 21, and after confirming this fact, perform the operation of closing the opening 101 with the shielding door 21. In the following, control etc. for performing such operations will be mainly explained.

FIG. 3 is an enlarged view of the bolt pin and the bolt block. The tip portions 22e1, 23e1 of the bolt pins 22e, 23e and the entrances 21a2, 21b2 of the holes 21a1, 21b1 of the bolt blocks 21a, 21b are tapered vertically downward, respectively. In FIGS. 2 and 3, the guide members 21e and 21f are fixed at fixed positions and guide the fitting of the bolt pins 22e and 23e to the bolt blocks 21a and 21b.

Returning to FIG. 2, the sensors used in the closing device 2 will be explained. Note that the sensors used in this embodiment are, for example, limit switches, but the present invention is not limited thereto, and various sensors can be used depending on the sensing purpose.

The lock detection units LS1 and LS5 are sensors that detect whether the bolts (barrel pins) are engaged in the bolt mechanisms 22 and 23. The lock detection units LS1 and LS5 are turned ON when the upper portions of the elevating members 22c and 23c move to the lowest movable ends. The unlock detection units LS2 and LS6 are sensors that detect that the bolt mechanisms 22 and 23 are not bolted. The unlock detection units LS2 and LS6 are sensors that turn ON when the lower portions of the elevating members 22c and 23c move to the highest movable ends. The home position detectors LS3 and LS7 are sensors that detect that the power cylinders 22b and 23b have returned to their home positions. The home position detectors LS3 and LS7 are sensors that are turned ON when the power cylinders 22b and 23b return to their home positions. The lock detection units LS4 and LS8 are sensors that detect whether the lock mechanisms 22 and 23 are locked. The lock detection units LS4 and LS8 are sensors that are turned ON when the lower portions of the elevating members 22c and 23c move to the lowest movable ends.

At a predetermined position in the left-right direction at the upper end of the shielding door 21, a detection end portion 21e extends upward to a predetermined height. The open detection section LS9 detects that the shielding door 21 is located at the correct open position 71 by detecting the detection end 21e. When sliding the shielding door 21, the acceleration/deceleration position detection parts LS10 and LS11 detect that the shielding door 21 has reached a position where the movement of the shielding door 21 is accelerated or decelerated by detecting the detection end 21e. Detect. The acceleration/deceleration position detection units LS10 and LS11 can detect the detection end 21e when the shielding door 21 reaches a predetermined position close to the final stop position during sliding movement. The acceleration/deceleration position detection units LS10 and LS11 serve as a third detection unit. The closed detection unit LS12 detects that the shielding door 21 is located in the correct closed position 72 by detecting the detection end 21e.

Returning to FIG. 1, the BOP detection section LS13 serves as a first detection section that detects opening and closing of the blowout panel (BOP) 1. The blowout panel 1 is closed when the BOP detection unit LS13 is ON, and is open when it is OFF. As the BOP detection unit LS13, for example, a reflective optical sensor or the like can be used.

The forced opening mechanism 3 will be explained with reference to FIG. The forced opening mechanism 3 is connected to the blowout panel 1 by a wire 31 serving as a connecting member, and pulls the blowout panel 1 via the wire 31 to close the blowout panel when the shielding door 21 slides. (Moves to the position indicated by the two-dot chain line in FIG. 1). One end of a chain 32 is connected to two positions on the left and right sides of the upper part of the blowout panel 1. Each other end of the chain 32 is connected to the tip of a chain connecting member 33 that extends outward from the top of the opening 101 of the outer wall 100. A winch support portion 34 projects outward from the lower part of the opening 101 of the outer wall 100. A pair of winches (not shown) are fixed to the winch support portion 34. One end of a wire 31 is connected to the left and right sides of the lower portion of the blowout panel 1, respectively. The other ends of these two wires 31 are respectively connected to the aforementioned winches (not shown), and the wires 31 can be wound up by the winches. The power sources of the two winches (not shown) are motors M4 and M5, respectively.

When an event that causes the blowout panel 1 to open occurs, the opened blowout panel 1 often remains at a halfway position. Therefore, when a winch (not shown) is driven by the forced opening mechanism 3, the blowout panel 1 is pulled by the wire 31 and forcibly opened, and moves to the position shown by the two-dot chain line in FIG. At this time, the blowout panel 1 is suspended from the tip of the chain connecting member 33 via the chain 32. Winding detection units LS14 and LS15 detect completion of winding of each wire 31. The winding detection units LS14 and LS15 serve as second detection units that detect that the blowout panel 1 has been moved to the outside beyond the position where the shielding door 21 passes due to the operation of the forced opening mechanism 3. As the winding detection units LS14 and LS15, the rotation sensors that detect the rotation angle of the winch (not shown) described above can be used.

The above is the device configuration of the opening/closing device 50. A nuclear reactor building is usually provided with a plurality of openings 101, each of which is provided with an opening/closing device 50 as described above. That is, the reactor building is equipped with a plurality of opening/closing devices 50, and the plurality of opening/closing devices 50 constitute an opening/closing system 60 (FIG. 4).

FIG. 4 is a functional block diagram of the control system of the opening opening/closing system. In this embodiment, for convenience, four opening/closing devices 50 are prepared, and an example in which these are controlled will be described. However, the present invention is not limited to this, and five or more opening/closing devices 50 may be installed, or three or less opening/closing devices 50 may be installed. The sensors 61 and actuators 62 provided in each opening/closing device 50 comprehensively represent the sensors and actuators of the opening/closing device 50 described above. The control system is composed of, for example, a computer, and controls each opening/closing device 50, respectively. Each opening/closing control section 63 is a functional block that represents a function realized by the computer. The fourth control unit 64 adjusts the timing at which each opening/closing device 5 starts operating each opening/closing device 5 .

Each opening opening/closing control section 63 controls the closing device 2 and the forced opening mechanism 3. In particular, each first control unit 65 controls the forced opening mechanism 3 to move the blowout panel 1 to the outside beyond the position where the shielding door 21 passes.
Each second control section 66 detects the opening of the blowout panel 1 with a BOP detection section LS13 serving as a first detection section, and/or detects the opening of the blowout panel 1 using winding detection sections LS14 and LS15 serving as a second detection section. 1 is detected to have moved outside the position through which the shielding door 21 passes. Then, on condition that these are detected, the closing device 2 is controlled to slide the shielding door 21 and close the opened opening 101 with the shielding door 21.

Further, when the third control unit 67 detects that the shielding door 21 has reached a predetermined position close to the final stop position by the acceleration/deceleration position detection units LS10 and LS11, which are the third detection units, the third control unit 67 causes the shielding door to be closed more than before. The closing device 2 is controlled to reduce the speed of sliding movement of the door 21.

Next, the effects of this embodiment will be explained.
First, the operations of the forced opening mechanism 3 and the closing device 2 of the opening opening/closing device 50 will be explained. FIG. 5 is a flowchart showing the details of the control executed by the opening/closing control section 63 when the closing device 2 performs the operation of closing the shielding door 21. When the blowout panel 1 is opened due to an increase in pressure within the reactor building, each opening opening/closing control section 63 is operated by the manager of the reactor building operating a predetermined operation switch. In the opening/closing control section 63, the first control section 65 first determines whether the lock detection sections LS1, LS5 and the open detection section LS9 are ON (S1). When the lock detectors LS1 and LS5 are ON, the lock is locked by the lock mechanisms 22 and 23, and when the open detector LS9 is ON, the shielding door 21 is in the correct open position 71. This confirms that the shielding door 21 is in the correct open position 71 and is locked by the locking mechanism 22. When the blowout panel 1 is normally closed, the shielding door 21 is bolted by a bolt mechanism 22 so that the shielding door 21 does not move unnecessarily. At this time, the reason why the shield door 21 is bolted at the closed position 72 by the bolt mechanism 23 is to prevent dirt or the like from entering the hole 21b1 of the bolt block 21d of the bolt mechanism 23. If any of the lock detection units LS1, LS5 and open detection unit LS9 are OFF (No in S1), the start conditions for the series of processes are not satisfied, such as when the forced opening mechanism 3 and the closing device 2 have already operated. Therefore, the series of processing ends.

When the lock detection units LS1, LS5 and the open detection unit LS9 are ON (Yes in S1), the first control unit 65 performs forced open winding of the blowout panel 1 (S2). That is, the motors M4 and M5 are driven to pull the blowout panel 1 with the wire 31 and forcibly open it. As a result, when the blowout panel 1 moves to the position indicated by the two-dot chain line in FIG. 1, the second control unit 66 detects that the winding detection units LS14 and LS15 are turned on (Yes in S3). . That is, by turning on the winding detection units LS14 and LS15, it is detected that the wire 31 of a length necessary for the blowout panel 1 to move to the position indicated by the broken line in FIG. 1 has been wound up. As a result, it is no longer necessary to pull the wire 31 any further, so the first control unit 65 stops winding the wire 31 by the motors M4 and M5 (S4).

Next, when the second control unit 66 detects that the blowout panel 1 is opened by turning off the BOP detection unit LS13 (Yes in S5), the second control unit 66 proceeds to S6 and S7. In addition, in the process of FIG. 5, the process is configured to proceed to S6 and S7 and subsequent processes when S3 is Yes and S5 is Yes, but the process is configured to proceed to S6 and S7 and subsequent processes when S3 is Yes or S5 is Yes. You can also use it as In S6 and S7, the second control unit 66 raises the bar pins 22e and 23e at the open position 71 and the closed position 72 by driving the motors M2 and M3. When the lock pins 22e, 23e rise to the highest position, the unlock detection units LS2, LS6 are turned ON (Yes in S8, Yes in S9), and until then, the second control unit 66 controls the lock pins 22e, 23e. 23e is continued (No in S8, No in S9). When the unlock detection units LS2 and LS6 are turned on (Yes in S8, Yes in S9), the bar pins 22e and 23e have risen to the highest position, so the second control unit 66 stops the motors M2 and M3. Then, the bar pins 22e and 23e stop rising (S10, S11). As a result, the bolt is released at the open position 71 and the closed position 72 of the shielding door 21. Therefore, the shielding door 21 in the open position 71 can be slid.

Next, the second control unit 66 starts the closing operation of the shielding door 21 by driving the motor M1 (S12). This sliding movement of the shielding door 21 is performed at a predetermined low speed. When the acceleration/deceleration position detection section LS10 is turned off (Yes in S13), it means that the shielding door 21 has slid to a position where the detection end 21e cannot be detected by the acceleration/deceleration position detection section LS10. Since the position where such detection is no longer possible is the position where the shielding door 21 starts accelerating its sliding movement, the second control unit 66 accelerates the closing operation of the shielding door 21 (S14).

When the acceleration/deceleration position detection unit LS11 is turned ON (Yes in S15), this means that the shielding door 21 has slid toward the closed position 72 to a position where the detection end 21e can be detected by the acceleration/deceleration position detection unit LS11. be. Since this position is a position where deceleration of the sliding movement is started immediately before the shielding door 21 reaches the closed position 72, the third control unit 67 decelerates the closing operation of the shielding door 21 (S16). When the closed detection unit LS12 is turned ON (Yes in S17), it means that the sliding shielding door 21 has reached the closed position 72. In that case, the second control unit 66 stops the closing operation of the shielding door 21 (S18). Then, the second control unit 66 outputs a door close signal indicating that the shielding door 21 has been closed to a predetermined output destination (S19) to notify that the shielding door 21 has been closed.

Since the shielding door 21 is closed in this way, the second control unit 66 controls the motors M2 and M3 to lower the bar pins 22e and 23e on the closed position 72 side and the open position 71 side (S20, S21). . The lock detection units LS1 and LS5 are turned ON when the upper portions of the elevating members 22c and 23c move to the lowest movable ends. The lock detection units LS4 and LS8 are turned ON when the lower portions of the elevating members 22c and 23c move to the lowest movable ends. This means that the bolt pins 22e and 23e have been completely inserted into the holes 21a1 and 21b1 of the bolt blocks 21c and 21d. Therefore, when the lock detection units LS1, LS5 and the lock detection units LS4, LS8 are turned on (Yes in S22, Yes in S23), the second control unit 66 stops the lowering of the bolt pins 22e, 23e ( S24, S25).

Next, the second control unit 66 drives the motors M2 and M3 to return the power cylinders 22b and 23b, which drive the bolt pins 22e and 23e, to their home positions via the lifting members 22c and 23c (S26, S27). . Since the home position detectors LS3 and LS7 detect that the power cylinders 22b and 23b have returned to their home positions, S26, The process in S27 is continued (No in S28, No in S29). When the fixed position detection units LS3 and LS7 are turned ON (Yes in S28, Yes in S29), the second control unit 66 stops the power cylinders 22b and 23b (S30 and S31).

Next, it is determined whether the lock detection units LS1, LS5 and the close detection unit LS12 are ON (S32). When the lock detection units LS1, LS5 and the closed detection unit LS12 are ON (Yes in S32), the shielding door 21 is correctly positioned at the closed position 72 and is bolted at the closed position 72 and the open position 71. It can be confirmed that the closing operation of the shielding door 21 is completely completed. Therefore, in this case, the second control unit 66 ends the series of processing. The reason why the locking mechanism 23 is used to lock the door at the closed position 72 is to prevent the shielding door 21 from moving inadvertently from the closed position 72 and to securely close the opening 101.

Note that if the processes from S2 onwards cannot be completed within a predetermined time period, the series of processes is terminated and the opening/closing control unit 63 notifies the administrator that an abnormal situation has occurred. .

Next, the operation of opening the shielding door 21 will be explained. FIG. 6 is a flowchart showing the details of the control executed by the opening opening/closing control section 63 when the closing device 2 performs the operation of opening the shielding door 21. Each opening/closing control section 63 operates when the reactor building manager operates a predetermined operation switch. First, the second control section 66 determines whether the lock detection sections LS1, LS5 and the closed detection section LS12 are ON (S41). As described above, when the lock detection units LS1 and LS5 are ON, the lock mechanisms 22 and 23 are locked in the closed position 72 and the open position 71 of the shielding door 21. Furthermore, when the closed detection unit LS12 is ON, the shielding door 21 is in the closed position 72. When the lock detection units LS1, LS5 and the close detection unit LS12 are ON (Yes in S41), the process proceeds to S42 and S43. When the lock detection units LS1, LS5 or the closed detection unit LS12 are OFF (No in S41), the process ends because the start conditions for the series of processes are not satisfied, such as when the closing device 2 has already been operated.

In S42 and S43, the motors M2 and M3 are controlled to raise the bar pins 22e and 23e when the shielding door 21 is in the open position 71 and the closed position 72, respectively. When the lock pins 22e, 23e rise to the highest position, the unlock detection units LS2, LS6 are turned ON (Yes in S44, Yes in S45), and until then, the second control unit 66 controls the lock pins 22e, 23e. 23e is continued (No in S44, No in S45).

When the unlock detection parts LS2 and LS6 are turned on (Yes in S44, Yes in S45), the bolt is released, so the motors M2 and M3 are controlled in the open position 71 and the closed position 72 of the shielding door 21 to release the bolt. 22e and 23e are stopped from rising (S46, S47).

Next, the second control unit 66 controls the motor M1 to slide the shielding door 21 to start the opening operation of the shielding door 21 (S48). When the acceleration/deceleration position detection unit LS11 is turned off (Yes in S49), it means that the shielding door 21 has slid toward the open position 71 to a position where the acceleration/deceleration position detection unit LS11 exceeds the position of the detection end 21e. It is. Since this position is the position where acceleration of the sliding movement of the shielding door 21 is started, the second control unit 66 accelerates the opening operation of the shielding door 21 (S50). When the acceleration/deceleration position detection unit LS10 is turned on (Yes in S51), it means that the sliding shield door 21 approaches the open position 71. In that case, the third control unit 67 slows down the opening operation of the shielding door 21 (S52). When the open detection unit LS9 is turned ON (Yes in S53), it means that the shielding door 21 has reached the open position 71. Therefore, in this case, the second control unit 66 controls the motor M1 to stop the opening operation of the shielding door 21 (S54).

Since the shielding door 21 is opened in this way, the second control unit 66 controls the motors M2 and M3 to lower the bar pins 22e and 23e on the closed position 72 side and the open position 71 side (S55, S56). . The lock detection units LS1 and LS5 are turned ON when the upper portions of the elevating members 22c and 23c move to the lowest movable ends. The lock detection units LS4 and LS8 are turned ON when the lower portions of the elevating members 22c and 23c move to the lowest movable ends. This means that the bolt pins 22e and 23e have been completely inserted into the holes 21a1 and 21b1 of the bolt blocks 21c and 21d. Therefore, when the lock detection units LS1, LS5 and the lock detection units LS4, LS8 are turned on (Yes in S57, Yes in S58), the second control unit 66 stops the lowering of the bolt pins 22e, 23e ( S59, S60).

Next, the second control unit 66 drives the motors M2 and M3 to return the power cylinders 22b and 23b that drive the bolt pins 22e and 23e to their home positions via the lifting members 22c and 23c (S61 and S62). . Since the home position detection units LS3 and LS7 detect that the power cylinders 22b and 23b have returned to their home positions, S61, The process in S62 is continued (No in S63, No in S64). When the fixed position detection units LS3 and LS7 are turned on (Yes in S63, Yes in S64), the second control unit 66 stops the power cylinders 22b and 23b (S65 and S66).

Next, it is determined whether the lock detection units LS1, LS5 and the open detection unit LS9 are ON (S67). When the lock detection units LS1, LS5 and the open detection unit LS9 are ON (Yes in S67), the shielding door 21 is correctly positioned at the open position 71 and is bolted at the closed position 72 and the open position 71. It can be confirmed that the opening operation of the shielding door 21 is completely completed. Therefore, in this case, the second control unit 66 ends the series of processing.

Note that if the processes from S22 onwards cannot be completed within a predetermined time, the series of processes is terminated and the opening/closing control unit 63 notifies the administrator that an abnormal situation has occurred. .

As described above, for example, four opening/closing devices 50 are installed in the reactor building. 7 to 10 are timing charts illustrating the operations of the closing device 2 and forced opening mechanism 3 in each opening opening/closing device 50. First, as an example, it is assumed that it takes 40 minutes from the occurrence of a specific event such as an increase in internal pressure in the reactor building and the opening of the blowout panel 1 to the establishment of negative pressure in the reactor building. The first 30 minutes of the 40 minutes are assumed to be the time required to restore power to the reactor building. Furthermore, the last 5 minutes of the 40 minutes are assumed to be the time required to drive a predetermined exhaust mechanism and establish negative pressure inside the reactor building. Between the time required to restore power and the time required to drive the specified exhaust mechanism, the time required to forcibly open the blowout panel 1 and close the shielding door 21 is assumed to be 4 minutes (these estimated times are for reference only). (This is an example.) Therefore, the operations of the closing devices 2 and forced opening mechanisms 3 in all the opening/closing devices 50 are completed within the four minutes described above. The series of operations will be explained below.

FIG. 7 is a timing chart illustrating the operation of each device in the first opening/closing device 50. In FIG. 7, the horizontal axis indicates elapsed time. The vertical axis shows the device name and operation name of each device of the closing device 2 and the forced opening mechanism 3. The timing chart also shows the ON/OFF timings of the various sensors described above.
When the reactor building manager operates a predetermined operation switch to instruct each opening opening/closing device 50 to start operating, the fourth control unit 64 controls the opening of the first opening closing device 50. An instruction is issued to the opening/closing control section 63 to start a series of operations. In response to this, the first control section 65 of the opening opening/closing control section 63 of the first opening opening/closing device 50 starts the winding operation by the motors M4 and M5 when the open detection section LS9 is turned ON. The timing at this time is shown as "closing start" on the timing chart.

The symbol "A" on the timing chart is the extra length winding time of the wire 31. After this, when the extra length of the wire 31 is wound up, the wire 31 pulls the blowout panel 1, and there is a BOP (blowout panel) holding time during which the blowout panel 1 stands firm against the pulling of the wire 31 ( code “B” on the timing chart). The blowout panel 1 comes off during this BOP holding time, and then the wire 31 is wound up at the BOP winding time indicated by the symbol "C" on the timing chart, and the blowout panel 1 is removed as shown in the two-dot chain line in FIG. Move to the position indicated by . When the winding detection units LS14 and LS15 are turned on, winding of the wire 31 is completed and the motors M4 and M5 are stopped.

At this time, opening of the blowout panel 1 is detected by turning off the BOP detection unit LS13, and at this timing, the second control unit 66 controls the power cylinders 22b, 23b on the open position 71 side and the closed position 72 side of the shielding door 21. The robot starts rising from the standby position toward the rising end. When the unlock detecting parts LS2 and LS6 are turned on, the bar pins 22e and 23e are raised to the rising end by the power cylinders 22b and 23b, and the bar is released at the open position 71 side and the closed position 72 side of the shielding door 21. When confirmed, the second control unit 66 operates the motor M1 to shift from a stopped state to a low-speed operation and start sliding movement of the shielding door 21. Thereafter, based on the detection that the acceleration/deceleration position detection section LS10 is OFF and the acceleration/deceleration position detection section LS11 is ON, the second control section 66 changes the operation of the shielding door 21 by the motor M1 from a low-speed operation to a steady operation (the acceleration operation described above). ) and then shifts to low-speed operation again. Thereafter, the shielding door 21 has reached the closed position 72 by turning on the closing detection section LS12, so the second control section 66 stops the motor M1. At this time, the door close signal described above is output.

Then, the power cylinders 22b and 23b on the open position 71 side and the closed position 72 side of the shielding door 21 are lowered from the rising end to the lowering end, and the bolts are engaged on the open position 71 side and the closed position 72 side of the shielding door 21. Thereafter, the power cylinders 22b and 23b on the open position 71 side and the closed position 72 side of the shielding door 21 are moved to the standby position, and the series of processes is completed.

FIG. 8 is a timing chart illustrating the operation of each device in the second opening/closing device 50. In FIG. 8, the processing content is the same as that in FIG. 7, but one difference is that in FIG. 7, the series of operations starts immediately after "closing start", whereas the second opening opening/closing device 50 The point is that the fourth control unit 64 starts a series of operations t seconds (T=t) after the "start of closing".

FIG. 9 is a timing chart illustrating the operation of each device in the third opening/closing device 50. The processing for the third device is also similar to that shown in FIG. 7, but the fourth control unit 64 starts a series of operations 2t seconds (T=2t) after the "start closing" of the third opening opening/closing device 50.

FIG. 10 is a timing chart illustrating the operation of each device in the fourth opening/closing device 50. The process for the fourth device is also similar to that shown in FIG. 7, but in the fourth opening/closing device 50, the fourth control section 64 starts a series of operations 3t seconds (T=3t) after the "start of closing".
In this way, the four opening/closing devices 50 start their operations at different times, but all operations are completed within a predetermined time (four minutes in this example).

According to the opening/closing device 50 and the opening/closing system 60 of the present embodiment described above, it is confirmed that the blowout panel 1 is opened (Yes in S5). It is also confirmed that by winding the wire 31 to the required length (Yes in S3, S4), the blowout panel 1 has moved to the position shown by the two-dot chain line in FIG. 1 outside the reactor building. After confirming these, the blowout panel 1 is guided to the position indicated by the two-dot chain line in FIG. 1 by a wire 31 wound by a winch (not shown), and is restrained at that position. Further, at this time, the wire 31 and chain 32 are also guided by the operation of a winch (not shown) to the position indicated by the two-dot chain line in FIG. 1, and are restrained at that position. Thereby, the blowout panel 1, the wire 31, and the chain 32 do not obstruct the movement of the shielding door 21. Thereafter, the shielding door 21 can be moved to the closed position 72 (S12 to S18), and the opening 101 can be closed. That is, the shielding door 21 can be reliably closed without the blowout panel 1, wire 31, and chain 32 getting in the way.

The closing device 2, specifically the shielding door 21, also closes the blowout panel 1 when the blowout panel 1 is moved to the position indicated by the two-dot chain line in FIG. It is located at an open position 71 where it does not interfere with the movement of 1. Therefore, the shielding door 21 can be prevented from becoming an obstacle to completely opening the blowout panel 1.

Moreover, even if the shielding door 21 reaches the open position 71 and the closed position 72 (Yes in S17, Yes in S53), the tips 22e1 and 23e1 of the bar pins 22e and 23e and the bar blocks 21a and 21b There is a possibility that a positional shift occurs due to an error between the holes 21a1 and 21b1. However, as shown in FIG. 3, the tip portions 22e1, 23e1 of the bolt pins 22e, 23e and the inlets 21a2, 21b2 of the holes 21a1, 21b1 of the bolt blocks 21a, 21b are tapered vertically downward, respectively. . Therefore, when inserting the bolt pins 22e and 23e into the holes 21a1 and 21b1 of the bolt blocks 21a and 21b, the above-mentioned positional deviation is corrected and the bolt can be reliably bolted.

Furthermore, when the shielding door 21 slides and reaches a position close to the closed position 72 and the open position 71 (Yes in S15, Yes in S51), the movement of the shielding door 21 is made slow (S16, S52). Therefore, it becomes easy to accurately stop the shielding door 21 at the closed position 72 and the open position 71. Therefore, in this respect as well, the bolt pins 22e, 23e and the holes 21a1, 21b1 of the bolt blocks 21a, 21b can be easily positioned accurately. Therefore, the bolt pins 22e and 23e can be accurately inserted into the holes 21a1 and 21b1 of the bolt blocks 21a and 21b, and the bolt can be reliably bolted.

Further, when driving each opening/closing device 50, the highest electric power is generally required at the start of operation of each opening/closing device 50. Therefore, if each opening opening/closing device 50 in the opening opening/closing system 60 is started at the same time, an excessive power load is placed on the power supply system. In this regard, the opening/closing system 60 sequentially drives each opening/closing device 50 with a time difference of t seconds (FIGS. 7 to 10). Therefore, it becomes possible to reduce the power load on the power supply system to a level that does not cause any problems.

In the above embodiment, each opening opening/closing device 50 is started one at a time with a time difference, but if there is no problem with the power load on the power supply system, for example, two opening opening/closing devices 50 are started at a time. 50 may be started.

Note that the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the embodiments described above are described in detail to explain the present invention in an easy-to-understand manner, and the present invention is not necessarily limited to having all the configurations described.
For example, in the embodiment described above, the shield door 21, which slides as a shield, is moved in the horizontal direction. However, the present invention is not limited thereto, and the shielding body can be realized by various devices that can open and close the opening 101, such as a shutter. Further, the shielding door 21, shutter, etc. that serve as a shielding body are not limited to movement in the horizontal direction, but may be moved in the vertical direction.

1 Blowout panel 2 Closing device 3 Forced opening mechanism 11 Clip (fastener)
21 Shielding door (shielding body)
21a1, 21b1 Hole 22a2, 22b2 Entrance 21c, 21d Lock block 22e, 23e Lock pin 22e1, 23e1 Tip 22, 23 Lock mechanism 31 Wire (connecting member)
50 Opening/closing device 60 Opening/closing system 64 Fourth control section 65 First control section 66 Second control section 67 Third control section 71 Open position 72 Closed position 101 Opening section LS13 BOP detection section (first detection section)
LS14, LS15 Winding detection section (second detection section)

Claims (6)

a blowout panel that is fastened by fasteners to close an opening in a building, and whose fasteners come off due to an increase in the internal pressure of the building and open the opening;
a closing device having a shield that moves along an outer wall of the building, and closing the opening opened by moving the shield with the shield;
a forced opening mechanism connected to the blowout panel by a connecting member and pulling the blowout panel via the connecting member to move the blowout panel to the outside beyond a position where the shielding door passes; ,
a first detection unit that detects opening and closing of the blowout panel;
a second detection unit that detects that the blowout panel and the connection member have been moved outside a position where the shield passes through due to the operation of the forced opening mechanism;
a first control unit that controls the forced opening mechanism to move the blowout panel and the connecting member to the outside beyond a position where the shield passes;
The first detection section detects that the blowout panel is opened, and/or the second detection section detects that the blowout panel and the connecting member have moved outside a position through which the shield passes. a second control unit that controls the closing device to move the shield and close the opened opening with the shield, on the condition that the opening is detected;
The first control unit controls the forced opening mechanism so that the connecting member, which was in a position that obstructs movement of the shield before the operation thereof, is moved so that the connecting member is in a position that obstructs movement of the shield after the blowout panel is moved. An opening opening/closing device that operates to guide the user to a position where it does not obstruct the user and to restrain the user at that position. The first control unit controls the forced opening mechanism to guide the blowout panel to a position that does not inhibit movement of the shield when the blowout panel is moved to the outside, and to restrain the blowout panel at the position. The opening/closing device according to claim 1, wherein the opening/closing device operates. The closing device is located at a position where it does not interfere with opening of the blowout panel when the forced opening mechanism moves the blowout panel to the outside before closing the opening with the shield. The opening/closing device according to claim 1 or 2. Two locking mechanisms are provided for locking the shield at the closed position and the open position of the opening, respectively,
Each of the locking mechanisms has a structure in which the locking is performed by inserting a locking pin provided in the locking mechanism into a hole of a locking block provided on the shield side,
The opening/closing device according to any one of claims 1 to 3, wherein an entrance of the hole in the barb block and a tip end of the barb pin have a tapered shape. a third detection unit that detects that the shield has reached a predetermined position close to a final stop position when the shield is moved to close the opening;
When the third detection unit detects that the shielding body has reached a predetermined position close to the final stop position, the third detection unit controls the closing device to reduce the speed of movement of the shielding body compared to before. The opening/closing device according to any one of claims 1 to 4, further comprising three control sections. A plurality of opening/closing devices according to any one of claims 1 to 5 are provided in the building,
The first control section moves the blowout panel and the connecting member outside a position through which the shield passes, and then the second control section moves the shield to open the opening. When performing the operation of closing the door with the shield, a fourth control unit may be provided for controlling the plurality of opening opening/closing devices so that some of the opening opening/closing devices have different operation start times. An opening opening/closing system featuring:

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