Blowout panel device

Abstract

To provide a blowout panel device which can reduce the impact force when a blowout panel is opened.SOLUTION: The blowout panel device includes: a blowout panel 11 for opening or closing an opening 1a provided in a building 1; and a hinge part 21 for rotatably connecting the blowout panel 11 to the building 1. The hinge part 21 has a driving mechanism for driving the hinge part 21 and opening or closing the blowout panel 11. The driving mechanism has a speed reduction mechanism 30A for operating the blowout panel 11 while reducing the speed of the blowout panel 11 when opening the blowout panel 11.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a blowout panel apparatus. [Background technology]

[0002] Nuclear power facilities are equipped with blowout panels to release pressure buildup within the building. These blowout panels are required to have an opening and closing function, to be able to reopen after opening, and to ensure the airtightness of the reactor building while they are closed.

[0003] For example, a structure that provides an opening and closing function to a blowout panel is described in Patent Document 1. Patent Document 1 describes a blowout panel that can be opened via a hinge and then returned to a closed position by a wire. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-200191 A Summary of the Invention [Problem to be solved by the invention]

[0005] A blowout panel having such an opening and closing function needs to be protected from damage when the blowout panel is opened and until the environment in the reactor building after opening is improved. However, the blowout panel described in Patent Document 1 has a problem with the impact load when the blowout panel is opened.

[0006] SUMMARY OF THE PRESENT INVETION The present invention is devised to solve the above-mentioned problems of the conventional art, and has an object to provide a blowout panel device capable of mitigating the impact force when the blowout panel is opened. [Means for solving the problem]

[0007] The present invention is characterized in that it comprises a blowout panel that opens and closes an opening provided in a building, and a hinge portion that rotatably connects the blowout panel to the building, the hinge portion having a drive mechanism that drives the hinge portion to open and close the blowout panel. Effect of the Invention

[0008] According to the present invention, it is possible to provide a blowout panel device capable of absorbing the impact force when the blowout panel is opened. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a front view of a blowout panel device according to a first embodiment. [Diagram 2] 4A to 4C are explanatory diagrams illustrating the operation of the blowout panel device of the first embodiment. [Diagram 3] FIG. 11 is a front view of a blowout panel device according to a second embodiment. [Figure 4] 11A to 11C are diagrams illustrating the operation of the blowout panel device according to the second embodiment. [Diagram 5] FIG. 11 is a schematic diagram showing a separation mechanism of a blowout panel device according to a third embodiment. [Figure 6] 6 is an explanatory diagram of the operation of the detachment mechanism in FIG. 5. [Figure 7] 13 is a front view showing a modified example of the connecting structure between the speed reducing mechanism and the hinge portion. FIG. [Figure 8] 13 is a front view showing another modified example of the connection structure between the speed reducing mechanism and the hinge portion. FIG. [Figure 9] FIG. 13 is a front view of a blowout panel device according to a fourth embodiment. [Figure 10] 13A to 13C are diagrams illustrating the operation of the blowout panel device according to the fourth embodiment. [Figure 11] FIG. 13 is a front view of a blowout panel device according to a fifth embodiment. [Figure 12] 13A to 13C are diagrams illustrating the operation of the blowout panel device of the fifth embodiment. [Figure 13]FIG. 13 is a side view of a blowout panel apparatus according to a sixth embodiment. [Figure 14] 13A to 13C are diagrams illustrating the operation of the blowout panel device of the seventh embodiment. [Figure 15] 13A to 13C are diagrams illustrating the operation of the blowout panel device of the eighth embodiment. [Figure 16] FIG. 13 is a schematic diagram showing a demagnetization mechanism of the blowout panel device of the ninth embodiment. [Figure 17] 17 is an explanatory diagram of the operation of the demagnetization mechanism of FIG. 16. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiment, and various modifications and application examples within the technical concept of the present invention are also included in its scope. (First embodiment) FIG. 1 is a front view of a blowout panel apparatus according to a first embodiment. 1, a blowout panel apparatus (hereinafter abbreviated as BOP apparatus) 100A includes a blowout panel (hereinafter abbreviated as BOP) 11 that opens and closes an opening 1a formed in an outer wall of a reactor building (hereinafter abbreviated as building) 1. The opening 1a has a rectangular shape when viewed from the front, and is formed in a side wall (side surface) of the building 1.

[0011] The BOP device 100A is an upper hinge type in which the hinge portions 21, 21 are installed on the upper portion of the BOP 11. The hinge portions 21 are arranged spaced apart from each other on the left and right sides of the upper edge of the BOP 11. The BOP 11 is made of, for example, an aluminum alloy, formed in a rectangular plate shape, and has an area larger than the opening 1a. By making the BOP 11 out of an aluminum alloy in this way, the load applied to the hinge portions 21 during an earthquake or when the BOP 11 is opened can be reduced compared to a BOP made of iron, etc.

[0012] A speed reduction mechanism 30A is provided on the side of one of the hinge sections 21 (on the outside in the arrangement direction of the hinge sections 21) to reduce the speed of the BOP 11 when the BOP 11 is opened. This speed reduction mechanism 30A is composed of a gear section 31 and a speed reduction section 32A. In the first embodiment, the speed reduction section 32A is provided between the hinge section 21 and the gear section 31. One side of the speed reduction section 32A is connected to the gear section 31, and the other side is connected to the hinge section 21.

[0013] Fig. 2 is an explanatory diagram of the operation of the blowout panel device of the first embodiment. The left diagram of Fig. 2 shows the standby state in which the BOP 11 is completely closed, the center diagram of Fig. 2 shows the opening process in which the BOP 11 is in the middle of opening, and the right diagram of Fig. 2 shows the deceleration process in which the BOP 11 is open to the maximum angle. 2, a frame portion 2 is provided around an opening 1a in the building 1. The frame portion 2 is a mounting plate for fixing a hinge portion 21 and the like when mounting the BOP 11, and is formed in a rectangular frame shape around the opening 1a.

[0014] The frame 2 is provided with a packing 3 for ensuring airtightness between the opening 1a and the BOP 11 when the BOP 11 is closed. The packing 3 is formed in a rectangular frame shape along the frame 2. The packing 3 is also formed in a position that faces the outer periphery of the back surface of the BOP 11 when the BOP 11 is closed.

[0015] Furthermore, a magnet 4, which will be described later, is provided on the inner periphery of the packing 3. A plurality of magnets 4 are provided and arranged at intervals on the frame 2. In the upper hinge type of the first embodiment, the magnets 4 are arranged along positions facing the lower edge of the BOP 11, and along positions facing the left and right edges of the BOP 11 (see FIG. 1). Details of the magnets 4 will be described later.

[0016] As shown in the left diagram of FIG. 2, the speed reducer 32A includes a rotation side friction plate 32a (rotation side friction portion) provided on the BOP 11 side and a speed reducer side friction plate 32b (speed reducer side friction portion) provided on the building 1 side. The rotation side friction plate 32a rotates together with the BOP 11, and a friction portion 32a1 having a larger friction resistance than the other surfaces is formed on a part of the disk. The speed reducer side friction plate 32b is fixed to the building 1 side and does not rotate, and a friction portion 32b1 having a larger friction resistance than the other surfaces is formed on a part of the disk. The rotation side friction plate 32a and the speed reducer side friction plate 32b are arranged in a direction in which the friction portion 32a1 and the friction portion 32b1 face each other. The rotation side friction plate 32a rotates while sliding against the speed reducer side friction plate 32b.

[0017] The left diagram in FIG. 2 shows the BOP 11 in a completely closed state, in which the friction portion 32a1 and the friction portion 32b1 are not overlapped (not meshed). From the state shown in the left diagram in FIG. 2, the BOP 11 opens due to steam pressure. As a result, as shown in the center diagram in FIG. 2, the BOP 11 rotates under pressure, and the rotation-side friction plate 32a also rotates. In this case, until the BOP 11 opens to a predetermined angle θ (for example, 30 degrees) (until the rotation-side friction plate 32a rotates to the predetermined angle), the rotation-side friction plate 32a and the deceleration-side friction plate 32b do not overlap (do not mesh), so no friction occurs and the BOP 11 rotates in a free state. In other words, the BOP 11 opens at high speed due to steam pressure without decelerating until it opens to the predetermined angle θ. In this way, the BOP 11 opens quickly to the predetermined angle without friction, and the steam pressure in the building 1 can be immediately released to the outside. Furthermore, by allowing the BOP 11 to open quickly without experiencing friction up to the predetermined angle θ, it is possible to prevent damage to the BOP 11 that would otherwise occur if the BOP 11 were to receive all of the steam pressure without opening. Note that, although the predetermined angle θ has been described as 30 degrees, it can be set appropriately depending on the purpose and specifications of the BOP 11.

[0018] After the BOP 11 opens by a predetermined angle θ, as shown in the right diagram of FIG. 2, the friction portion 32a1 of the rotation side friction plate 32a starts to overlap (start to mesh) with the friction portion 32b1 of the deceleration side friction plate 32b, friction occurs between the rotation side friction plate 32a and the deceleration side friction plate 32b, and the BOP 11 opens while decelerating. Then, the BOP 11 gradually decelerates and opens to a maximum angle (for example, 90 degrees), at which point the BOP 11 stops. In addition, the frictional force between the friction portion 32a1 and the friction portion 32b1 keeps the BOP 11 in the stopped open state. In this way, the BOP 11 opens while decelerating when opening, so that the impact force at the time of opening the BOP 11 can be reduced. In addition, it is also possible to respond to a case where the BOP 11 is required to be kept open after it is opened.

[0019] The BOP device 100A of the first embodiment thus configured includes a BOP 11 that opens and closes an opening 1a provided in a building 1, and a hinge unit 21 that rotatably connects the BOP 11 to the building 1. The hinge unit 21 includes a speed reduction mechanism 30A that drives the hinge unit 21 to perform an opening and closing operation of the BOP 11. The speed reduction mechanism 30A operates the BOP 11 while decelerating the speed when the BOP 11 is opened. This makes it possible to suppress the impact force when the BOP 11 is opened.

[0020] In the first embodiment, the reduction gear mechanism 30A includes a rotation-side friction plate 32a provided on the BOP 11 side and a speed-reduction-side friction plate 32b provided on the building 1 side, and the rotation-side friction plate 32a slides and rotates relative to the speed-reduction-side friction plate 32b to reduce the speed of the BOP 11. This allows the reduction gear mechanism 30A to be configured without expanding the installation area.

[0021] In the first embodiment, the speed reduction mechanism 30A starts deceleration after the BOP 11 opens to a predetermined angle θ, and when the BOP 11 opens to the maximum angle and stops, the BOP 11 is held in a stopped state. This makes it possible to respond to a request to keep the BOP 11 open after it has been opened.

[0022] Second embodiment Fig. 3 is a front view of the blowout panel device of the second embodiment, and Fig. 4 is an explanatory diagram of the operation of the blowout panel device of the second embodiment. Note that the same components as those of the first embodiment are given the same reference numerals and will not be described again. 3, the BOP device 100B is equipped with a BOP 12 that opens and closes an opening 1a formed in the outer wall of a building 1. The BOP device 100B is also a bottom hinge type in which hinge units 22, 22 are installed at the bottom of the BOP 12. The hinge units 22 are arranged spaced apart on the left and right, and are located on both the left and right sides of the bottom edge of the BOP 12.

[0023] A speed reduction mechanism 30B is provided on the side of one of the hinge sections 22 (on the outside in the arrangement direction of the hinge sections 22) to reduce the speed of the BOP 12 when the BOP 12 is opened. Similar to the upper hinge type speed reduction mechanism 30A, this speed reduction mechanism 30B is composed of a gear section 31 and a speed reduction section 32B. The speed reduction section 32B is provided between the hinge section 22 and the gear section 31. One side of the speed reduction section 32B is connected to the gear section 31, and the other side is connected to the hinge section 22.

[0024] As shown in the left diagram of FIG. 4, the speed reducer 32B includes a rotation side friction plate 32c (rotation side friction portion) provided on the BOP 12 side, and a speed reducer side friction plate 32d (speed reducer side friction portion) provided on the building 1 side. The rotation side friction plate 32c rotates together with the BOP 12, and a friction portion 32c1 having a larger friction resistance than the other surfaces is formed on a part of the disk. The speed reducer side friction plate 32d is fixed to the building 1 side and does not rotate, and a friction portion 32d1 having a larger friction resistance than the other surfaces is formed on a part of the disk. The rotation side friction plate 32c and the speed reducer side friction plate 32d are arranged in such a direction that the friction portion 32c1 and the friction portion 32d1 face each other. The rotation side friction plate 32c rotates while sliding against the speed reducer side friction plate 32d.

[0025] The left diagram in FIG. 4 shows the BOP 12 in a completely closed state, in which the friction portion 32c1 and the friction portion 32d1 are not overlapped (not meshed). From the state shown in the left diagram in FIG. 4, the BOP 12 opens due to steam pressure. As a result, as shown in the center diagram in FIG. 4, the BOP 12 rotates under pressure, and the rotation-side friction plate 32c also rotates. In this case, until the BOP 12 opens to a predetermined angle θ (for example, 30 degrees) (until the rotation-side friction plate 32c rotates to the predetermined angle), the rotation-side friction plate 32c and the deceleration-side friction plate 32d do not overlap (do not mesh), so no friction occurs and the BOP 12 rotates in a free state. In other words, the BOP 12 opens at high speed due to steam pressure without decelerating until it opens to the predetermined angle θ. In this way, the BOP 12 opens quickly to the predetermined angle θ without experiencing friction, and the steam pressure in the building 1 can be immediately released to the outside. Furthermore, by allowing the BOP 12 to open quickly to the predetermined angle θ without experiencing friction, damage to the BOP 12 caused by the BOP 12 receiving all of the steam pressure without opening can be prevented.

[0026] After the BOP 12 opens by a predetermined angle θ, as shown in the right diagram of FIG. 4, the friction portion 32c1 of the rotation side friction plate 32c starts to overlap (start to mesh) with the friction portion 32d1 of the deceleration side friction plate 32d, friction occurs between the rotation side friction plate 32c and the deceleration side friction plate 32d, and the BOP 12 opens while decelerating. Then, the BOP 12 gradually decelerates and opens to a maximum angle (for example, 90 degrees), at which point the BOP 12 stops. In addition, the weight of the BOP 12 keeps the BOP 12 in an open state where it has stopped. In this way, the BOP 12 opens while decelerating, thereby reducing the impact force when the BOP 12 opens.

[0027] In the second embodiment thus configured, similarly to the first embodiment, it is possible to suppress the impact force when the BOP 12 is opened.

[0028] Third embodiment Fig. 5 is a schematic diagram showing a separation mechanism of a blowout panel device of the third embodiment, and Fig. 6 is a diagram illustrating the operation of the separation mechanism of Fig. 5. This separation mechanism is applied to an upper hinge type in which the hinge portion 21 is provided on the upper part of the BOP 11. As shown in FIG. 5, the BOP device 100A is provided with a manual lever 35 (disconnecting mechanism) for disconnecting the rotation side friction plate 32a and the speed reducer side friction plate 32b. The left diagram of FIG. 5 shows a state in which the lever 35 is not operated, and the rotation side friction plate 32a and the speed reducer side friction plate 32b are connected. The right diagram of FIG. 5 shows a state in which the lever 35 is operated, and the connection between the rotation side friction plate 32a and the speed reducer side friction plate 32b is released. By operating the lever 35 in this way to release the connection between the rotation side friction plate 32a and the speed reducer side friction plate 32b, as shown in FIG. 6, the BOP 11 rotates from the open state to the closed state by its own weight (gravity) from the position shown by the two-dot chain line. In addition, since the connection between the rotation side friction plate 32a and the speed reducer side friction plate 32b is released, the rotation side friction plate 32a rotates without receiving a friction force with the speed reducer side friction plate 32b.

[0029] In the third embodiment configured in this manner, the hinge portion 21 is disposed above the opening 1a and includes a separation mechanism that can separate the rotation-side friction plate 32a and the speed-reduction-side friction plate 32b. The separation mechanism includes a lever 35 that can be manually operated to separate the friction plates. This allows the BOP 11 to be closed even in the event of a power loss, when it is desired to forcibly close the BOP 11.

[0030] FIG. 7 is a front view showing a modified example of the connecting structure between the speed reducing mechanism and the hinge portion. 7, in the BOP device 100A of the first embodiment, the hinge units 21 arranged spaced apart on the left and right are connected by a single shaft 41. This makes it easy to synchronize the timing at which the left and right hinge units 21 start to decelerate, suppresses twisting of the BOP 11, and enhances the deceleration effect.

[0031] FIG. 8 is a front view showing another modified example of the connecting structure between the speed reducing mechanism and the hinge portion. As shown in FIG. 8, in the BOP device 100A of the first embodiment, a speed reduction mechanism 30A is disposed between the left and right hinge portions 21. The speed reduction mechanism 30A and one of the hinge portions 21 are connected by a shaft 42, and the speed reduction mechanism 30A and the other hinge portion 21 are connected by a shaft 43. The speed reduction mechanism 30A has a speed reduction section 32A connected to one of the hinge portions 21 and a speed reduction section 32A connected to the other hinge portion 21. Even with this configuration, it is easy to match the timing at which the left and right hinge portions 21 start to decelerate, as in FIG. 7, and the screw of the BOP 11 can be suppressed to enhance the deceleration effect.

[0032] (Fourth embodiment) FIG. 9 is a front view of the blowout panel apparatus of the fourth embodiment, and FIG. 10 is an explanatory diagram of the operation of the blowout panel apparatus of the fourth embodiment. As shown in Fig. 9, the BOP device 100C of the fourth embodiment is an upper hinge type in which hinge units 21, 21 are installed on the top of the BOP 11. On both the left and right sides of the BOP 11, speed reduction mechanisms 30C are provided that decelerate the BOP 11 when the BOP 11 is opened. The speed reduction mechanism 30C includes a speed reduction unit 32C. One side of the speed reduction unit 32C is connected to the building 1 side, and the other side is connected to the BOP 11 side.

[0033] As shown in the left diagram of FIG. 10, the deceleration unit 32C is configured by combining a cylinder unit 33 and a damper unit 34. The cylinder unit 33 is configured with a tube 33a and a piston 33b that moves forward and backward relative to the tube 33a. The damper unit 34 is configured with a tube 34a, a piston 34b that moves forward and backward relative to the tube 34a, and air 34c interposed between the piston 34b and the tube 34a. The cylinder unit 33 and the damper unit 34 are connected so that their axial centers coincide with each other. The tube 33a of the cylinder unit 33 is rotatably connected to the building 1 side, and the piston 34b of the damper unit 34 is rotatably connected to the BOP 11.

[0034] The left diagram of FIG. 10 shows the BOP 11 in a completely closed state, with the cylinder section 33 and the damper section 34 in the most contracted state. From the state shown in the left diagram of FIG. 10, the BOP 11 opens due to steam pressure. As a result, as shown in the center diagram of FIG. 10, the BOP 11 opens while the cylinder section 33 extends before the damper section 34. In this case, the cylinder section 33 extends and the damper section 34 does not extend until the BOP 11 opens to a predetermined angle θ (for example, 30 degrees). In other words, the BOP 11 opens at high speed due to steam pressure without decelerating until it opens to the predetermined angle θ. In this way, the BOP 11 opens to the predetermined angle θ without receiving resistance from the damper section 34, so that the steam pressure inside the building 1 can be immediately released to the outside. In addition, the BOP 11 opens quickly to the predetermined angle θ without receiving resistance from the damper section 34, so that damage to the BOP 11 caused by the BOP 11 receiving all the steam pressure without opening can be prevented.

[0035] After the BOP 11 opens by a predetermined angle θ, the cylinder section 33 is in a fully extended state, so the damper section 34 now begins to extend and the BOP 11 opens while decelerating, as shown in the right diagram of Figure 10. Then, the BOP 11 gradually decelerates and opens to the maximum angle (e.g., 90 degrees) and then stops.

[0036] Furthermore, by using a cylinder section 33 that does not reverse (contract) after it has expanded, the open state of the BOP 11 is maintained by the retaining force of the damper section 34. In this way, the BOP 11 opens while decelerating, thereby reducing the impact force at the time of opening the BOP 11. It is also possible to respond to cases where the BOP 11 needs to be kept open after it has been opened.

[0037] In the fourth embodiment configured as described above, the speed reduction mechanism 30C includes a speed reduction unit 32C configured by combining a cylinder unit 33 provided on the building 1 side and a damper unit 34 provided on the BOP 11 side. The cylinder unit 33 operates to open the BOP 11 to a predetermined angle θ without decelerating, and the damper unit 34 operates to open the BOP 11 while decelerating. This makes it possible to suppress the impact force when the BOP 11 is opened.

[0038] Furthermore, in the fourth embodiment, when the BOP 11 does not need to be held open after opening, an upper hinge type in which the hinge portion 22 is provided above the opening 1a is adopted. With this, when the BOP 11 does not need to be held open, the BOP 11 can open according to steam pressure and close automatically according to gravity.

[0039] Fifth embodiment FIG. 11 is a front view of the blowout panel apparatus of the fifth embodiment, and FIG. 12 is an explanatory diagram of the operation of the blowout panel apparatus of the fifth embodiment. As shown in Fig. 11, the BOP device 100D is a bottom hinge type in which the hinge units 22, 22 are installed at the bottom of the BOP 12. Reduction mechanisms 30D that decelerate the BOP 12 when the BOP 12 is opened are provided on both the left and right sides of the BOP 12. The reduction mechanism 30D includes a reduction unit 32D. One side of the reduction unit 32D is connected to the building 1 side, and the other side is connected to the BOP 12 side.

[0040] As shown in the left diagram of FIG. 12, the speed reducing section 32D is configured by combining a cylinder section 33 and a damper section 34, as in the third embodiment. The cylinder section 33 is configured with a tube 33a and a piston 33b that moves forward and backward relative to the tube 33a. The damper section 34 is configured with a tube 34a, a piston 34b that moves forward and backward relative to the tube 34a, and air 34c filled between the piston 34b and the tube 34a. The cylinder section 33 and the damper section 34 are fixed so that their axial centers coincide with each other. The tube 33a of the cylinder section 33 is rotatably connected to the building 1 side, and the piston 34b of the damper section 34 is rotatably connected to the BOP 12.

[0041] The left diagram of FIG. 12 shows the state in which the BOP 12 is completely closed, and the cylinder section 33 and the damper section 34 are in the most contracted state. From the state shown in the left diagram of FIG. 12, the BOP 12 opens due to steam pressure. As a result, as shown in the center diagram of FIG. 12, the BOP 12 opens while the cylinder section 33 extends before the damper section 34. In this case, the cylinder section 33 extends and the damper section 34 does not extend until the BOP 12 opens to a predetermined angle θ (for example, 30 degrees). In other words, the BOP 12 opens at high speed due to steam pressure without decelerating until it opens to the predetermined angle θ. In this way, the BOP 12 opens to the predetermined angle θ without receiving resistance from the damper section 34, so that the steam pressure inside the building 1 can be immediately released to the outside. In addition, the BOP 12 opens quickly to the predetermined angle θ without receiving resistance from the damper section 34, so that damage to the BOP 12 caused by the BOP 12 receiving all the steam pressure without opening can be prevented.

[0042] After the BOP 12 opens by a predetermined angle θ, the cylinder section 33 is in a fully extended state, so the damper section 34 now begins to extend and the BOP 12 opens while decelerating, as shown in the right diagram of Figure 12. Then, the BOP 12 gradually decelerates and opens to the maximum angle (e.g., 90 degrees) and then stops.

[0043] Furthermore, by using a cylinder section 33 that does not reverse (contract) after it has expanded, the open state of the BOP 12 is maintained by the retaining force of the damper section 34. In this way, the BOP 12 opens while decelerating, thereby reducing the impact force at the time of opening the BOP 12. It is also possible to respond to cases where the BOP 12 needs to be kept open after it has been opened.

[0044] In the fifth embodiment thus configured, similarly to the fourth embodiment, it is possible to suppress the impact force when the BOP 12 is opened.

[0045] Furthermore, in the fifth embodiment, when earthquake resistance is required for the BOP 12, a bottom hinge type in which the hinge portion 22 is provided below the opening 1a is adopted. This prevents the BOP 12 from closing due to gravity, so that the open state of the BOP 12 can be maintained.

[0046] Sixth embodiment FIG. 13 is a side view of the blowout panel apparatus of the sixth embodiment. The BOP device 100E of the sixth embodiment is a bottom hinge type, and includes a platform 51 and a panel receiving portion 52. The BOP device 100E is not provided with a speed reduction mechanism, but may be provided with a speed reduction mechanism. The platform 51 is disposed at the bottom of the opening 1a, and is formed extending in a direction perpendicular to the wall surface of the building 1. The panel receiving portion 52 is made of a member that can support and hold the tip of the BOP 12 when the BOP 12 is opened. In other words, the panel receiving portion 52 is fixed so that the BOP 12 does not move, and the open state of the BOP 12 is maintained. The panel receiving portion 52 may be made of an elastic member that elastically supports the BOP 12 when the BOP 12 is opened.

[0047] Incidentally, in the BOP devices 100A-100D, there are cases where the BOPs 11, 12 are required to be held open and cases where they are not. This is determined by the plant. When holding the BOPs open is not required, an upper hinge type that closes by gravity is used. On the other hand, when earthquake resistance to large acceleration is required and holding the BOPs open is required, a lower hinge type that has a mechanism to hold the BOPs firmly in the open state is used.

[0048] The sixth embodiment configured in this manner includes a BOP 12 that opens and closes an opening 1a provided in a building 1, and a hinge unit 21 that rotatably connects the BOP 12 to the building 1, the hinge unit 21 being arranged at the bottom of the opening 1a and including a panel receiving unit 52 that receives and holds the BOP 12 when the BOP 12 is opened to its maximum angle, and a stand 51 that is provided in the building 1 and on which the panel receiving unit 52 is mounted. This makes it possible to prevent impacts when the BOP 12 is opened, even without providing a reduction mechanism. Furthermore, providing the stand 51 allows it to be used as a scaffold for maintenance.

[0049] Seventh embodiment FIG. 14 is a side view of the blowout panel apparatus of the seventh embodiment. As shown in Fig. 14, in the BOP device 100F of the seventh embodiment, all of the magnets are permanent magnets 4A. The permanent magnets 4A are fixed to the frame 2 of the building 1. As shown in Fig. 1, a plurality of permanent magnets 4A are arranged in opposing positions along the outer periphery of the left and right sides and the outer periphery of the bottom of the BOP 11. If the BOP 11 is made of a non-magnetic material such as an aluminum alloy, the BOP 11 is provided with a magnetic member in a position opposing the permanent magnet 4A.

[0050] In this way, in the seventh embodiment, when an earthquake load is expected to be applied to the BOP 11, the permanent magnets 4A are set so that a fixing force larger than the earthquake load acts on the BOP 11. If the BOP 11 is opened by an earthquake, it will affect things inside the building 1, so it is required that the BOP 11 does not open due to the earthquake load.

[0051] Eighth embodiment FIG. 15 is a side view of the blowout panel apparatus of the eighth embodiment. As shown in FIG. 15, the BOP device 100G of the eighth embodiment is one in which some of the permanent magnets 4A are replaced with electromagnets 4B. The number of electromagnets 4B to be replaced with the permanent magnets 4A is appropriately set according to the fixing force required in normal times and the expected earthquake load. As shown in the left diagram of FIG. 15, in normal times when only the permanent magnets 4A are effective, the fixing force is set to the minimum required to ensure the airtightness of the building 1, and the BOP 11 can be opened and closed with a small force. On the other hand, as shown in the right diagram of FIG. 15, in the event of an earthquake, a current is passed through the electromagnet 4B to activate the electromagnet 4B, and a strong fixing force is generated by the permanent magnets 4A and the electromagnets 4B, so that the BOP 11 can firmly resist the earthquake load (the closed state can be maintained).

[0052] In the eighth embodiment configured in this manner, permanent magnets 4A and electromagnets 4B are provided around the opening 1a to ensure airtightness of the building 1 by the BOP 11, and airtightness is ensured by the fixing force of the permanent magnets 4A during normal times, and a stronger fixing force than normal times is obtained by operating the electromagnets 4B during an earthquake. This allows the fixing force to be kept to a minimum during normal times, even when a very large earthquake is expected.

[0053] A permanent electromagnet may be used instead of electromagnet 4B. A permanent electromagnet permanently retains its magnetic force once a strong current is passed through it, and can maintain the force that closes BOP 11 even in the unlikely event that power is lost due to an earthquake.

[0054] Ninth embodiment FIG. 16 is a schematic diagram showing a demagnetization mechanism of a blowout panel device according to the ninth embodiment, and FIG. 17 is a diagram illustrating the operation of the demagnetization mechanism of FIG. As shown in FIG. 16, the permanent magnet 4A is fixed to a rail member 61. The rail member 61 is formed with a hole 62 (fixing portion) for fixing the permanent magnet 4A. The permanent magnet 4A is fixed to the rail member 61 by passing a bolt (not shown) through the hole 62 and screwing it into the permanent magnet 4A. The rail member 61 is formed with a plurality of holes 62, and the permanent magnet 4A is fixed to a position corresponding to the magnetic body 6 provided on the BOP 11. The rail member 61 is configured to move in a predetermined direction by a drive unit (not shown). The moving direction is not a direction perpendicular to the surface of the magnetic body 6, but a direction parallel to the surface of the magnetic body 6.

[0055] As shown in the left diagram of FIG. 17, in the attracted state, the permanent magnet 4A and the magnetic body 6 face each other, and the magnetic body 6 is attracted to the permanent magnet 4A. As a result, the BOP 11 is maintained in the closed state by the fixing force of the permanent magnet 4A. In this way, the structure is basically designed to withstand earthquake loads. Then, a demagnetization mechanism that weakens the fixing force is operated by remote control. As shown in the right diagram of FIG. 17, when demagnetizing the permanent magnet 4A, the rail member 61 is driven so that the permanent magnet 4A moves in a direction parallel to the surface of the magnetic body 6. By shifting the permanent magnet 4A in such a direction, it is possible to move the permanent magnet 4A with, for example, about one-quarter of the force required to move the permanent magnet 4A in a direction perpendicular to the surface of the magnetic body 6. In this way, the fixing force is strong during normal attracted state, and it can be demagnetized to switch to a weak fixing force when necessary.

[0056] The ninth embodiment configured in this manner is provided with a permanent magnet 4A for ensuring airtightness of the building 1, and a demagnetization mechanism 60 for weakening the magnetic force between the permanent magnet 4A and the BOP 11, and a magnetic body 6 is provided in the BOP 11 at a position facing the permanent magnet 4A. This makes it possible to easily open the BOP 11 without providing a large drive mechanism for opening the BOP 11.

[0057] Moreover, in the ninth embodiment, the demagnetization mechanism 60 includes a rail member 61 that slides the permanent magnet 4A in the surface direction of the magnetic body 6, and a hole 62 (fixing portion) that fixes the permanent magnet 4A to the rail member 61. With this, even if the driving force that drives the permanent magnet is small, the BOP 11 can be opened.

[0058] In the ninth embodiment, the permanent magnet 4A is moved upward relative to the magnetic body 6, but if there is space for movement, it may be moved left / right or downward to be demagnetized.

[0059] The present invention is not limited to the above-described embodiments, and can be configured by appropriately combining the first to ninth embodiments. [Explanation of symbols]

[0060] 1 Reactor building (building) 1a aperture 2 Frame 3. Packing 4. Magnets 4A permanent magnet 4B Electromagnet 11,12 BOP (Blowout Panel) 21,22 Hinge part 30A,30B,30C,30D Reduction mechanism 31 Gear section 32A, 32B, 32C, 32D Reduction section 32a, 32c Rotating side friction plate (rotating side friction part) 32b, 32d Reduction side friction plate (reduction side friction part) 32a1,32b1 Friction part 33 Cylinder section 33a tube 33b Piston 34 Damper section 34a tube 34b Piston 34c Air 35 Lever (detachment mechanism) 41, 42, 43 Axis 51 Mount 52 Panel receiving part 60 Demagnetization mechanism 61 Rail parts 62 holes (fixed part) 100A, 100B, 100C, 100D, 100E, 100F, 100G Blowout Panel Device

Claims

1. A blowout panel that opens and closes an opening provided in a building, and a hinge portion that rotatably connects the blowout panel to the building, A blowout panel device, wherein the hinge portion includes a drive mechanism that drives the hinge portion to open and close the blowout panel.

2. 2. The blowout panel apparatus of claim 1, The blowout panel device according to claim 1, wherein the drive mechanism includes a deceleration mechanism for decelerating the blowout panel when the blowout panel is opened.

3. 3. The blowout panel apparatus of claim 2, The reduction mechanism includes a rotation side friction portion provided on the blowout panel side and a reduction side friction portion provided on the building side, A blowout panel device, characterized in that the rotation side friction portion slides and rotates relative to the deceleration side friction portion, thereby decelerating the blowout panel.

4. 4. The blowout panel apparatus of claim 3, The blowout panel device is characterized in that the deceleration mechanism begins to decelerate after the blowout panel opens to a predetermined angle, and when the blowout panel opens to its maximum angle and stops, the blowout panel is held in a stopped state.

5. 4. The blowout panel apparatus of claim 3, The hinge portion is disposed at an upper portion of the opening, a separation mechanism capable of separating the rotation side friction portion and the speed reducing side friction portion, The blowout panel device according to claim 1, wherein the disconnecting mechanism includes a lever that is manually operated to disconnect the blowout panel.

6. 3. The blowout panel apparatus of claim 2, The hinge portion includes a plurality of hinge portions, the speed reducing mechanism is disposed on the outside in an arrangement direction of the hinge portions, A blowout panel device, wherein each of the hinge portions is connected by a single shaft.

7. 4. The blowout panel apparatus of claim 3, The hinge portion includes a plurality of hinge portions, the speed reducing mechanism is disposed between adjacent hinge portions, A blowout panel device, characterized in that each of the hinge portions is connected to the reduction mechanism via a shaft.

8. 3. The blowout panel apparatus of claim 2, The speed reduction mechanism includes a speed reduction unit formed by combining a damper unit provided on the building side and a cylinder unit provided on the blowout panel side, The cylinder portion is operated to open the blowout panel to a predetermined angle without decelerating, A blowout panel device, characterized in that the damper portion operates to cause the blowout panel to open while decelerating.

9. 9. The blowout panel apparatus of claim 8, A blowout panel device characterized in that, when earthquake resistance is required for the blowout panel, a bottom hinge type in which the hinge portion is provided below the opening is adopted.

10. 9. The blowout panel apparatus of claim 8, A blowout panel device characterized in that, when the blowout panel does not need to be held open after being opened, an upper hinge type in which the hinge portion is provided above the opening is adopted.

11. 9. The blowout panel apparatus of claim 8, A permanent magnet and an electromagnet are provided around the opening to ensure airtightness of the building by the blowout panel, Under normal circumstances, the fixing force of the permanent magnet ensures airtightness. A blowout panel device characterized in that, in the event of an earthquake, the electromagnet is activated to obtain a stronger fixing force than during normal times.

12. 12. The blowout panel apparatus of claim 11, A blowout panel device characterized in that a permanent electromagnet is used instead of the electromagnet.

13. 12. The blowout panel apparatus of claim 11, a permanent magnet for ensuring airtightness of the building; and a demagnetization mechanism for weakening a magnetic force between the permanent magnet and the blowout panel, A blowout panel device, characterized in that a magnetic body is provided on the blowout panel at a position facing the permanent magnet.

14. 14. The blowout panel apparatus of claim 13, A blowout panel device characterized in that the demagnetization mechanism comprises a rail member that slides the permanent magnet in the surface direction of the magnetic body, and a fixing portion that fixes the permanent magnet to the rail member.

15. A blowout panel that opens and closes an opening provided in a building, and a hinge portion that rotatably connects the blowout panel to the building, The hinge portion is disposed at a lower portion of the opening, A blowout panel device comprising: a panel receiving portion that receives and holds the blowout panel when the blowout panel is opened to its maximum angle; and a stand that is provided in the building and on which the panel receiving portion is mounted.

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