Blowout Panel Device

Abstract

To provide a blowout panel device which can accurately define an open pressure of a blowout panel.SOLUTION: The present invention includes a blowout panel 23 for opening or closing an opening unit 50 of a building; and a hinge 1A for rotatably supporting the blowout panel 23. The hinge 1A is provided in an upper part of the blowout panel 23 and has a magnet 6 for closing the blowout panel 23 by magnetic force. The magnet 6 is a structure 13 for turning on or turning off the magnetic force.SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] Under the new regulations, nuclear facilities must close the openings formed in the building when the blowout panel (BOP) is opened to release pressure that builds up inside the building. The BOP must have an opening and closing function to reclose after opening, and ensure the airtightness of the reactor building while it is closed.

[0003] The BOP is installed on the reactor building itself. The BOP is equipped with fixing clips and chains to prevent the panels from scattering. When the internal pressure of the building rises to a specified level, the clips deform, causing the panels to move outside the building and be released. After release, the panels are suspended by the chains.

[0004] The BOP is attached to the building frame using the clips and chains mentioned above, but in order for it to open at the specified pressure and to open and close, it needs a structure that can hold the panel at the specified load and install it on the building without the panel flying off after opening.

[0005] For example, Patent Document 1 describes a structure that provides an opening and closing function to a BOP. Patent Document 1 states, "When the internal pressure of the building rises and a stress equal to or greater than a predetermined value acts on a closure panel that is closed in the closed position, the locking member is released and the closure panel is opened. This allows communication between the inside and outside spaces of the building through the opening, thereby reducing the internal pressure of the building. At this time, the closure panel rotates and opens around a door hinge provided on the first side edge, and the closure panel stops at an open position where the opening angle is restricted by the linear member. This prevents the door hinge, which is the connection part with the opening periphery, from being damaged by the momentum of the opening of the closure panel, and prevents the closure panel from falling when opened. Then, after the interior of the building has been reliably checked, the wire connected to the closure panel can be wound up by the winding means at an appropriate timing, thereby returning the closure panel to its original closed position and closing the opening." [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 2019-200191 Summary of the Invention [Problem to be solved by the invention]

[0007] However, the blowout panel disclosed in Patent Document 1 has a fixed structure using clips (locking members) and is designed to open at a specified pressure through plastic deformation of the metal, so there was an issue in that it was difficult to guarantee that it opened at the specified opening pressure.

[0008] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a blowout panel device that can accurately regulate the opening pressure of a blowout panel. [Means for solving the problem]

[0009] The present invention provides a blowout panel that opens and closes an opening in a building, a hinge that rotatably supports the blowout panel, Equipped with The hinge is provided at the top or bottom of the blowout panel and includes a magnet that closes the blowout panel by magnetic force. The magnet has a plurality of structures that can turn on / off the magnetic force, and the attractive force of the magnet is adjusted by adjusting the number of the magnets that are turned on. It is characterized by: [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a blowout panel device that can accurately regulate the opening pressure of the blowout panel. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 2 is a front view showing an upper hinge type BOP according to the first embodiment. [Figure 2] FIG. 2 is a side view showing an upper hinge type BOP according to the first embodiment. [Figure 3] FIG. 10 is an explanatory diagram showing a mechanism for maintaining the BOP in an open state. [Figure 4] FIG. 1 is an explanatory diagram showing a BOP fixing structure. [Figure 5] FIG. 10 is a perspective view showing a magnetic force ON / OFF structure. [Figure 6] FIG. 10 is an explanatory diagram illustrating the suction force adjustment mechanism of the BOP. [Figure 7] FIG. 1 is an explanatory diagram illustrating a magnetic force measurement mechanism using a strain gauge. [Figure 8] FIG. 10 is an explanatory diagram showing the impact absorbing structure when the BOP is closed. [Figure 9] FIG. 1 is an explanatory diagram showing a BOP fixing structure. [Figure 10] FIG. 10 is a side view showing the BOP fixing structure of FIG. 9. [Figure 11] FIG. 10 is an explanatory diagram showing the interlocking mechanism of the magnetic force ON / OFF structure. [Figure 12] FIG. 10 is an explanatory diagram showing a door lifting structure using a winch. [Figure 13]FIG. 10 is an explanatory diagram showing a fixing structure using a clip and a magnet. [Figure 14] FIG. 10 is an explanatory diagram illustrating a temporary boundary formation mechanism for maintenance. [Figure 15] FIG. 10 is a front view showing a bottom hinge type BOP according to a second embodiment. [Figure 16] FIG. 10 is a side view showing a bottom hinge type BOP according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment for carrying out the present invention will be described in detail with reference to the accompanying drawings. (First embodiment) Fig. 1 is a front view showing a top hinge type BOP according to the first embodiment, and Fig. 2 is a side view showing the top hinge type BOP according to the first embodiment. In Fig. 2, a blowout panel (hereinafter abbreviated as BOP) 23 is shown in a closed state by a solid line, and a state in which the BOP 23 is opened 90 degrees by a two-dot chain line. As shown in FIG. 1, a blowout panel apparatus 100A (hereinafter abbreviated as BOP apparatus) is installed to open and close an opening 50 formed in the outer wall of a reactor building, and has a structure in which a hinge 1A is installed on top of a BOP 23. The BOP apparatus 100A also includes a BOP 23. The BOP 23 is made of, for example, an aluminum alloy and is formed in the shape of a square plate. Note that the BOP 23 is not limited to being made of aluminum alloy, and may also be made of iron.

[0013] A drive unit 2 that rotates and drives the BOP 23 is installed to the side of the hinge 1A. The drive unit 2 is composed of an electric motor 2a and a gear 2b, and the gear 2b and the hinge 1A are connected via a drive shaft 1a. Furthermore, the BOP device 100A is structured to physically separate the drive shaft 1a using a clutch 8, since if the BOP 23 were to open in the event of an accident, an impact would act on the drive shaft 1a.

[0014] As shown in Fig. 2, the BOP device 100A includes an arm 30 that connects the BOP 23 and the hinge 1A. The arm 30 is formed in a substantially L-shape in side view, and is provided at two locations spaced apart in the left-right direction (see Fig. 1). One end of the arm 30 is fixed to the back surface of the BOP 23, and the other end is fixed to the hinge 1A.

[0015] The hinge 1A is provided with a ratchet 3 for maintaining the BOP 23 in an open state at a predetermined angle. The ratchet 3 is configured with locking grooves 3a and 3b and a claw 3c for locking the BOP 23 at a predetermined position.

[0016] The claw portion 3c is biased by an elastic member (not shown) toward the rotating body in which the locking grooves 3a and 3b are formed. Furthermore, on the opposite side of the rotating body across the claw portion 3c, a claw holder 3d is provided to hold the claw portion 3c in a position where the claw portion 3c and the locking grooves 3a and 3b are not engaged. The claw holder 3d may retract the claw portion 3c by magnetic force or by using an electric motor.

[0017] Fig. 3 is an explanatory diagram showing the mechanism for maintaining the BOP in an open state. The left diagram of Fig. 3 shows the BOP 23 in a closed state, and the right diagram of Fig. 3 shows the BOP 23 in an open state. As shown in the left diagram of Figure 3, when the BOP 23 is closed, the pawl 3c is in contact with the rotating body in which the locking grooves 3a and 3b are formed and is biased. From this state, the BOP 23 is physically coupled by the clutch 8 (see Figure 1), and the hinge 1A is driven by internal pressure or the drive unit 2, causing the ratchet 3 to rotate counterclockwise in the figure, and the BOP 23 to move in the opening direction. Then, as shown in the right diagram of Figure 3, the BOP 23 can be kept open at a predetermined angle by stopping the drive unit 2 when the pawl 3c is locked in the locking grooves 3a and 3b.

[0018] When closing the BOP 23 from the 90° open position shown in the right diagram of FIG. 3 (releasing the locking of the ratchet 3), the hinge 1A is further rotated counterclockwise by the electric motor 2a (drive unit 2) while physically coupled by the clutch 8 (see FIG. 1). This causes the striker 10, which is fixed to the rotating body, to press the pawl 3c, releasing the pawl 3c from the locking groove 3a. The released pawl 3c is held by the pawl holder 3d and does not return to the locking grooves 3a and 3b. Rotating the hinge 1A clockwise rotates the BOP 23 in the closing direction without the pawl 3c engaging the locking grooves 3a and 3b. After the BOP 23 is closed (see the left diagram of FIG. 3), the pawl 3c is released from the pawl holder 3d and is brought into contact with the rotating body of the ratchet 3.

[0019] As shown in Figures 1 and 2, by placing hinge 1A inside the building, it is possible to prevent the hinge 1A from becoming rusted and stuck due to salt damage, etc. Also, the angle of hinge 1A is designed to ensure the opening area of ​​the existing BOP 23 from the perspective of pressure reduction.

[0020] FIG. 4 is an explanatory diagram showing the BOP fixing structure. FIG. 4 shows a BOP fixing structure using a magnet 6. A magnetic body 11 is installed on the BOP 23 side, and a rail 4 and a magnet 6, which is adjustable by the rail 4, are installed on a mounting plate 7. The mounting plate 7 is fixed along the periphery of an opening 50 in the building. The magnet 6 is, for example, an electromagnet or a permanent magnet. The magnet 6 includes a plate 6a, through which a bolt 5a is inserted. The rail 4 is fixed to the building frame via the mounting plate 7. A groove 4a is formed in the rail 4, and a nut 5b is slidably inserted into the groove 4a. The magnet 6 is fastened to the rail 4 by the bolt 5a and the nut 5b. The groove 4a in the rail 4 extends perpendicular to the paper surface (left and right when viewed from the front of FIG. 1). By allowing the position of the magnet 6 to be changed using the rail 4, the attractive force with the BOP 23 can be adjusted.

[0021] The magnetic material 11 is embedded in the rear surface of the BOP 23 at a position facing the magnet 6. If the BOP 23 is made of aluminum or an aluminum alloy, the magnetic material 11 is attached to the BOP 23 because it is a non-magnetic material and will not be attracted to the magnet.

[0022] Additionally, a packing 12 is provided on the mounting plate 7. This packing 12 is provided in a position facing the outer peripheral edge of the back surface of the BOP 23. The packing 12 is also provided on the entire outer peripheral edge of the BOP 23, including the upper, lower, left and right edges, and seals the opening 50. As a result, when the BOP 23 closes, the packing 12 is crushed by the BOP 23, ensuring sealing performance.

[0023] Furthermore, a clearance 60 is formed between the magnet 6 and the magnetic body 11. This prevents the magnetic body 11 from colliding with the magnet 6 and damaging the magnet 6 when the BOP 23 is closed.

[0024] As shown in FIG. 1 , multiple magnets 6 are installed along the right edge of the BOP 23, spaced apart in the vertical direction. Multiple magnets 6 are installed along the left edge of the BOP 23, spaced apart in the vertical direction. Multiple magnets 6 are installed along the bottom edge of the BOP 23, spaced apart in the horizontal direction. The number of magnets 6 installed along the bottom edge is greater than the number of magnets 6 installed along the right and left edges. In this way, in the case of an upper hinge type in which the hinge 1A is installed at the top of the BOP 23, concentrating the magnets 6 at the bottom of the BOP 23 increases the moment, allowing for precise adjustment of the opening pressure by adjusting the placement of the magnets 6. Furthermore, compared to conventional structures, the load control allows for the amount of compression of the gasket 12 (described below) to be specified, which is expected to improve airtightness. Note that the mechanism for adjusting the attraction amount is not limited to magnets.

[0025] FIG. 5 is a perspective view showing a magnetic force ON / OFF structure. As shown in FIG. 5, a structure 13 (so-called magnet block) that turns the magnet 6 on and off can also be used as a mechanism for adjusting the magnetic force (attraction force). In other words, by installing more structures 13 than the specified amount in advance and turning on the magnetic force of only the required number, it is possible to set the required release pressure. In this case, the structure 13 that turns the magnet 6 on and off is structured to switch by rotating the north and south poles of the magnet 6 by 90 degrees. A lever (knob) 6b is installed at the tip of the magnet 6, and by rotating the lever 6b, the magnet 6 itself also rotates. Note that the plate 6a is not shown in FIG. 5.

[0026] FIG. 6 is an explanatory diagram showing the suction force adjustment mechanism of the BOP. As shown in FIG. 6 , as another magnetic force (attraction force) adjustment mechanism, a shielding plate 14 that shields the magnetic flux can be inserted between the magnet 6 and the magnetic body 11, making it possible to adjust the magnetic force. The shielding plate 14 is made of, for example, iron. The shielding plate 14 can be moved using a cylinder (not shown) or the like, and can be inserted from the bottom of the BOP 23 to adjust the magnetic force. By inserting the shielding plate 14 between the magnet 6 and the magnetic body 11 so as to increase the shielding area, the magnetic flux can be significantly reduced. A clearance 60 is provided between the magnet 6 and the magnetic body 11 to prevent damage to the magnet 6 due to a direct collision, and the shielding plate 14 is inserted into the clearance 60. Furthermore, to avoid the influence of surrounding instruments and iron structures during magnetic force control, a shielding plate can be installed nearby.

[0027] Furthermore, by measuring the attractive force of the magnet 6 that secures the BOP 23, it is possible to set the release pressure of the BOP 23 with high precision. In this case, as shown in Figure 1, a magnetic flux density meter 15 (see Figure 1) is installed near the magnet 6 as a mechanism for measuring magnetic force, which makes it possible to measure the magnetic flux density emitted from the side of the magnet and convert it into attractive force. The magnetic flux density meter 15 can be selected from a ferrite meter, a gauss meter, etc. Furthermore, the magnetic flux density meter 15 is arranged in a one-to-one correspondence with each magnet 6.

[0028] FIG. 7 is an explanatory diagram showing a magnetic force measurement mechanism using a strain gauge. As shown in Figure 7, instead of the magnetic flux density measuring device 15, a strain gauge 16 may be installed on the outside of the BOP as a magnetic force measuring mechanism. This makes it possible to measure the amount of distortion of the BOP 23 due to magnetic force and confirm the correlation with the adhesive force. In other words, when the magnet 6 and the magnetic body 11 attract each other, the BOP 23 is attracted to the magnet 6, causing the BOP 23 to deform inward. The degree of this distortion is measured by the strain gauge 16.

[0029] FIG. 8 is an explanatory diagram showing the shock absorbing structure when the BOP is closed. When the BOP 23 is closed, an impact force is applied to the magnet 6, and in order to prevent the magnet 6 from being demagnetized and the BOP 23 from being damaged, a structure is required to mitigate the impact force. Therefore, as shown in Figure 8, the impact force can be mitigated by installing a damper 17 on the BOP 23. The damper 17 is, for example, a pneumatic type, and one end of the damper 17 is rotatably connected to the BOP 23, and the other end is rotatably connected to the mounting plate 7 side.

[0030] Instead of a shock absorbing structure using the damper 17, a mechanism for varying the ratchet 3 and gear 2b may be installed on the electric motor 2a, and a variable structure may be used in which the ratchet 3 is normally active and the gear 2b is active when closing the BOP 23. This makes it possible to close the BOP 23 more gently than if it were to close under its own weight.

[0031] The BOP device 100A can also be used when the BOP 23 is opened remotely from the reactor building's central control room or when it is operated manually. When the BOP 23 is opened by a means other than increasing the internal pressure, this can be done using a drive unit 2 (electric motor 2a) or a cylinder mechanism 19, as shown in Figures 9 and 10. Figure 9 is an explanatory diagram illustrating the BOP fixing structure, and Figure 10 is a side view showing the BOP fixing structure of Figure 9.

[0032] 9, the cylinder mechanism 19 (BOP pushing mechanism) has a mechanism for pushing the BOP 23 toward the open side, and is installed below the BOP 23. A fixed piece 19a extending downward from the BOP 23 is fixed to the bottom of the BOP 23 at a position opposite the cylinder mechanism 19.

[0033] 10, the cylinder mechanism 19 is, for example, an air-operated one, and is configured to include an electric motor 19b, a cylinder portion 19c, and a pressing portion 19d. When the electric motor 19b is driven, the pressing portion 19d presses the back surface of the fixing piece 19a, pushing the BOP 23 toward the opening side.

[0034] By using the cylinder mechanism 19 in this way, the BOP 23 can be peeled off with a load greater than the attractive force of the magnet 6. After that, the drive unit 2 (see FIG. 9) can open the BOP 23 to a specified angle (for example, 30° or 90°). Note that the drive unit 2 and cylinder mechanism 19 must have a rated load greater than the attractive force of the magnetic force.

[0035] As another embodiment for peeling off the BOP 23, the shielding plate 14 may be inserted between the magnetic poles (between the magnet 6 and the magnetic body 11) when the BOP 23 is opened, thereby demagnetizing the BOP 23, as described in Fig. 6. Alternatively, the magnetic force ON / OFF structures 13 (see Fig. 5) may be remotely operated by a cylinder to operate the lever 6b (see Fig. 5), and after all of the structures 13 are turned OFF, the BOP 23 may be opened by the drive unit 2.

[0036] As shown in FIG. 11 , it is possible to turn on / off a plurality of arranged magnetic force ON / OFF structures 13 (magnets 6) in conjunction with one another. That is, this mechanism is configured to include a cylinder 40, an interlocking member 41, and a striker 42. The interlocking member 41 extends along the arrangement direction of the plurality of magnetic force ON / OFF structures 13 as magnets 6. The interlocking member 41 is provided with a striker 42 at a position corresponding to each structure 13, and the striker 42 is configured to engage with a lever 6b. The interlocking member 41 is also connected to the rod of the cylinder 40, and is configured to move in the arrangement direction of the structures 13 (left-right direction in the figure) when pushed and pulled by the rod of the cylinder 40. When the rod of the cylinder 40 is pulled, each lever 6b is turned off as shown by the solid line, and when the rod of the cylinder 40 is pushed, each lever 6b is turned on as shown by the two-dot chain line. In this way, by installing the striker 42 and the interlocking member 41 at the tip of the cylinder 40, it becomes possible to remotely adjust the ON / OFF of the structure 13 (magnet 6).

[0037] FIG. 12 is an explanatory diagram showing a door lifting structure using a winch. As shown in Fig. 12, the BOP device may be configured to open the BOP using a winch 20 instead of the drive unit 2 (electric motor 2a). This winch 20 is installed above the BOP 23, and the tip of a wire 20a is connected to the bottom of the BOP 23, which is in turn connected to the winch 20 via a pulley. By using such a winch 20, after the BOP 23 is peeled off by the cylinder mechanism 19, the BOP 23 can be lifted up by the winch 20 and opened to a specified angle.

[0038] FIG. 13 is an explanatory diagram showing a fixing structure using a clip and a magnet. As shown in Fig. 13, the BOP device has a structure in which a clip 21 and a shielding plate 14 are added to the configuration shown in Fig. 4 to open and close the BOP 23. The clip 21 maintains the closed state of the BOP 23, keeping the BOP 23 closed. The clip 21 is engaged with a locking portion 50a provided on the opening 50 side and a locking portion 23b provided on the BOP 23 side, and the opening 50 is sealed by the BOP 23.

[0039] The BOP device configured in this manner has a fixed structure using only the clip 21, as a demagnetizing shielding plate 14 is installed in advance. After the internal pressure increases, the clip 21 deforms into a V shape (see the two-dot chain line), and the clip 21 is released from the BOP 23, causing the BOP 23 to open in the W2 direction. At the same time, the shielding plate 14 is released from between the magnet 6 and the magnetic body 11. After the BOP 23 is released, the BOP 23 rotates in the W1 direction to close, and the device is fixed using only the magnet 6. Note that this structure has a structure in which the released clip 21 does not hinder the re-closing operation, or is installed in a position where it does not hinder it. Furthermore, any mechanical fastening other than the clip 21 may be used as long as it breaks under a certain load.

[0040] FIG. 14 is an explanatory diagram illustrating a temporary boundary formation mechanism for maintenance. As shown in Figure 14, when performing maintenance on the BOP device, it is necessary to demagnetize the BOP 23 and open it. Maintenance includes replacing the magnet 6 and inspecting the hinge 1A. At this time, the boundary formed by the BOP 23 will collapse if the BOP 23 is opened. Therefore, in consideration of equipment maintenance work, a mechanism 22 that forms a temporary boundary must be installed inside the building in advance. The boundary-forming mechanism 22 can be made of a shutter, a membrane material, or the like. A shutter can be installed during construction, and a sheet such as a membrane material can be applied before maintenance.

[0041] As described above, the BOP device 100A of the first embodiment includes the BOP 23 that opens and closes the building opening 50, and the hinge 1A that rotatably supports the BOP 23. The hinge 1A is provided above the BOP 23 and includes a magnet 6 that closes the BOP 23 by magnetic force (see FIG. 1). This makes it possible to precisely regulate the opening pressure of the BOP 23. Furthermore, by providing the hinge 1A above the BOP 23, it can be used in a closing-priority operation.

[0042] In the first embodiment, the magnet 6 includes a plurality of structures that can turn on / off the magnetic force, and the attractive force of the magnets is adjusted by adjusting the number of magnets that are turned on (see FIG. 5). This allows the magnetic force (attractive force) to be set with a simple structure.

[0043] Furthermore, in the first embodiment, the rail 4 is provided to move the magnet 6 along the BOP 23, and the attractive force of the magnet 6 is adjusted by adjusting the position of the magnet 6 (see FIG. 4). This allows the magnetic force (attractive force) to be set with a simple structure.

[0044] Furthermore, in the first embodiment, a shielding plate 14 that can move forward and backward is provided between the magnet 6 and the magnetic body 11 (see FIG. 6). This allows for more precise setting of the magnetic force (attraction force).

[0045] Furthermore, in the first embodiment, a magnetic flux density measuring device 15 is provided that measures the magnetic flux density of the magnet 6 (see FIG. 1). This makes it possible to measure the magnetic flux density of the magnet 6 with high accuracy.

[0046] Moreover, instead of the magnetic flux density measuring device 15, a strain gauge 16 for measuring the strain of the BOP 23 may be provided (see FIG. 7).

[0047] In addition, in the first embodiment, a damper 17 is provided to reduce the impact force when the BOP 23 is closed (see FIG. 8).

[0048] Furthermore, instead of the damper 17, the drive unit 2 may be provided with a speed reduction mechanism. This can prevent the BOP 23 from colliding with the magnet 6 and damaging the magnet 6 when the BOP 23 is closed.

[0049] Furthermore, in the first embodiment, a cylinder mechanism 19 is provided that presses the BOP 23 in a direction separating it from the magnet 6 (see FIGS. 9 and 10). This allows the BOP 23 to be opened by a means other than increasing the internal pressure.

[0050] Furthermore, in the first embodiment, the ratchet 3 is provided to maintain the BOP 23 in the open state (see FIGS. 2 and 3). This allows the BOP 23 to be maintained in the open state.

[0051] Furthermore, in the first embodiment, a drive unit 2 that rotates the BOP 23 is provided, and the drive unit 2 and the hinge 1A are connected via a clutch 8 (see FIG. 1). This makes it possible to prevent damage to the drive unit 2.

[0052] (Second embodiment) FIG. 15 is a front view showing a bottom hinge type BOP according to the second embodiment, and FIG. 16 is a side view showing a bottom hinge type BOP according to the second embodiment. As shown in Fig. 15, the BOP device 100B of the second embodiment has a structure in which a hinge 1B is provided at the bottom of the BOP 23, and a ratchet 3 is provided to maintain the open state of the BOP 23. In Fig. 15, the closed state of the BOP 23 is shown by a solid line, and the open state of the BOP 23 is shown by a two-dot chain line.

[0053] The BOP device 100B of the second embodiment includes a BOP 23 that opens and closes an opening 50 in a building, and a hinge 1B that rotatably supports the BOP 23. The hinge 1B is provided below the BOP 23 and includes a magnet 6 that closes the BOP 23 by magnetic force (see FIGS. 15 and 16). This makes it possible to precisely regulate the opening pressure of the BOP 23. Furthermore, by providing the hinge 1B below the BOP 23, the device can be used in operations that prioritize maintaining the open state.

[0054] The present invention is not limited to the above-described embodiment, and the configuration of the first embodiment can be appropriately selected and applied to the second embodiment. Furthermore, the structure for maintaining the open state of the BOP 23 may be one in which a brake mechanism is provided in the drive unit (electric motor) without using the ratchet 3. [Explanation of symbols]

[0055] 1A, 1B hinge 1a Drive shaft 2 Drive unit 2a electric motor 2b gear 3 Ratchet (ratchet mechanism) 3a,3b Locking groove 3c Claw part 3d claw retainer 4 Rail 4a groove 5a bolt 5b Nut 6. Magnets 6a Plate 6b Lever 7 Mounting plate 8 Clutch (clutch mechanism) 10 Striker 11 Magnetic material 12 Packing 13 Magnetic ON / OFF structure (magnetic ON / OFF structure) 14 Shield plate 15 Magnetic flux density measuring instrument 16 Strain gauge 17 Damper 18 gears 19 Cylinder mechanism 19a Fixed piece 19b electric motor 19c Cylinder section 19d Pressing part 20 winch 20a wire 21 clips 22 Boundary formation mechanism 23 BOP (Blowout Panel) 30 Arm 40 cylinders 41 Interlocking members 42 Striker 50 Opening 100A, 100B Blowout Panel Device

Claims

1. A blowout panel that opens and closes the building opening, a hinge that pivotally supports the blowout panel; the hinge is provided at the top or bottom of the blowout panel; a magnet for closing the blowout panel by magnetic force; The magnet has a plurality of structures that can turn on / off magnetic force, A blowout panel device characterized in that the attractive force of the magnets is adjusted by adjusting the number of magnets that are turned on.

2. A blowout panel that opens and closes the building opening, a hinge that pivotally supports the blowout panel; the hinge is provided at the top or bottom of the blowout panel; a magnet for magnetically closing the blowout panel; a rail for moving the magnet along the blowout panel; A blowout panel device characterized in that the attractive force of the magnet is adjusted by adjusting the position of the magnet.

3. A blowout panel that opens and closes the building opening, a hinge that pivotally supports the blowout panel; the hinge is provided at the top or bottom of the blowout panel; a magnet for magnetically closing the blowout panel; a shielding plate that moves freely forward and backward between the magnet and the magnetic body provided on the blowout panel;

4. A blowout panel that opens and closes the building opening, a hinge that pivotally supports the blowout panel; the hinge is provided at the top or bottom of the blowout panel; a magnet for magnetically closing the blowout panel; a magnetic flux density meter that measures the magnetic flux density of the magnet.

5. A blowout panel that opens and closes the building opening, a hinge that pivotally supports the blowout panel; the hinge is provided at the top or bottom of the blowout panel; a magnet for magnetically closing the blowout panel; and a strain gauge for measuring the strain of the blowout panel.

6. 6. The blowout panel device according to claim 1, further comprising a damper for absorbing an impact force when the blowout panel is closed.

7. an electric motor for rotating the blowout panel; 6. The blowout panel device according to claim 1, wherein the electric motor includes a speed reducing mechanism that reduces an impact force when the blowout panel is closed.

8. 6. The blowout panel device according to claim 1, further comprising a cylinder mechanism that presses the blowout panel in a direction away from the magnet.

9. 6. The blowout panel device according to claim 1, further comprising a ratchet mechanism for maintaining the blowout panel in an open state.

10. an electric motor for rotating the blowout panel; 6. The blowout panel device according to claim 1, wherein the electric motor includes a brake mechanism for maintaining the blowout panel in an open state.

11. an electric motor for rotating the blowout panel; 6. The blowout panel device according to claim 1, wherein the electric motor and the hinge are connected via a clutch mechanism.

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