JP7061926B2 - Blowout panel - Google Patents

Description

The present invention relates to a blowout panel.

Conventionally, in the reactor building, turbine building, etc. of a nuclear power plant, a blowout panel has been installed as a safety device for reducing the internal pressure of the reactor building due to the breakage of the main steam pipe or the like. This blowout panel is usually installed as a panel covering an opening provided in the upper part of the outer wall of the reactor building in order to release the pressure inside the reactor building.
As a mechanism for opening such a blowout panel, parts such as clips fixing the blowout panel are plastically deformed due to an increase in pressure inside the reactor building, and the panel falls to the outdoor part of the reactor building. (For example, see Patent Document 1).

In Patent Document 1, a closing panel attached to an opening frame of a building by a hinge and a fixing device that is destroyed when the internal pressure of the building exceeds a predetermined value, and one end attached to the closing panel. It is equipped with a wire, a pressure gauge that measures the internal pressure of the building, and a panel restoration device that winds up the other end of the wire in response to the measured value of this pressure gauge. The out device is disclosed.

Japanese Unexamined Patent Publication No. 2009-121917

In the conventional blowout panel, as a required performance for the blowout panel, the panel falls due to the pressure increase inside the reactor building and the opening is opened. Furthermore, after the pressure inside the reactor building drops due to the opening of the opening, the opening opened to prevent the diffusion of radioactive materials inside the building is quickly closed, and the exhaust device is activated to reduce the pressure inside the reactor building from atmospheric pressure. It was required to ensure higher airtightness because it was kept low and trapped radioactive materials.

Further, in Patent Document 1 described above, a device for controlling the panel recovery device to automatically operate when the measured value of the pressure gauge becomes a predetermined value or less is provided, but in reality, it is confirmed that the pressure drops. Not only that, it was necessary to close the panel after making various checks. That is, when the main steam pipe of the reactor building breaks, the atmosphere inside the building is filled with high-pressure and high-temperature steam. Therefore, after confirming the cooling status of the atmosphere inside the building and the pressure drop, the panel is closed. There was room for improvement in that respect.

The present invention has been made in view of the above-mentioned problems, and is a blowout panel capable of ensuring higher airtightness and closing the opening of the building at an appropriate timing when the inside of the building is surely confirmed. The purpose is to provide.

In order to achieve the above object, the blowout panel according to the present invention includes a closing panel that closes the opening of the outer wall of the building so as to be openable and closable from the outdoor side, and the first side of either of the closing panels in the left-right direction. The door hinge connecting the edge portion and the opening peripheral portion forming the opening portion in the outer wall, and the other second side edge portion of the closing panel are locked to the opening portion, and the internal pressure of the building is applied. A locking member that is released from the locked state when the value exceeds a predetermined value, an airtight packing that is arranged on the peripheral edge of the closing panel and abuts on the opening peripheral edge, and an opening angle of the closing panel at the open position. A wire member having a wire connected to the closing panel, and a winding means capable of winding the wire so as to close the closing panel in the open position to the closing position. It is characterized by that.

In the present invention, when the internal pressure of the building rises and a stress of a predetermined value or more acts on the closed panel in the closed position, the locked state of the locking member is released and the closed panel is opened. Will be done. As a result, the space inside and outside the building communicates with each other through the opening, and the internal pressure of the building can be reduced. At this time, the closing panel rotates around the door hinge provided on the first side edge portion to open, and the closing panel stops at the open position where the opening angle is restricted by the linear member. Therefore, it is possible to prevent the door hinge, which is a connecting portion with the opening peripheral portion, from being destroyed by the opening force of the closing panel, and it is possible to prevent the closing panel from falling when the closing panel is opened. Then, after the closing panel is opened, the wire connected to the closing panel is wound by the winding means at an appropriate timing when the inside of the building is surely confirmed, so that the closing panel is returned to the original closing position. Can close the opening.
Further, when the closing panel is closed, the airtight packing provided on the peripheral edge of the closing panel comes into contact with the opening peripheral edge, so that the airtightness inside the building at the opening can be improved.

Further, in the blowout panel according to the present invention, it is preferable that a plurality of door hinges are provided at the first side edge portion of the closing panel at intervals in the vertical direction.

In this case, since a plurality of door hinges are provided, the closing panel can be closed in a stable posture at the closing position. Therefore, the airtight packing provided on the entire circumference of the closing panel can be evenly pressed against the opening peripheral edge of the outer wall over the entire circumference, and higher airtightness can be ensured.

Further, the blowout panel according to the present invention may be characterized in that the linear member is the wire of the winding means.

In the present invention, the wire (straight member) that regulates the opening angle when the closing panel is opened is wound by a winding means to return the closing panel to the original closing position and close the opening. Can be done. In this case, it is not necessary to separately provide the linear member and the wire, and a simple structure can be obtained.

According to the blowout panel of the present invention, higher airtightness can be ensured, and the opening of the building can be closed at an appropriate timing when the inside of the building is surely confirmed.

It is a front view which looked at the blowout panel by embodiment of this invention from the outdoor side. FIG. 1 is a cross-sectional view taken along the line AA shown in FIG. 1 and is a view of the closing panel at the closing position as viewed from above. It is the figure which looked at the closing panel of an open position from above, and is the figure which corresponds to FIG. It is a figure which looked at the state before closing the closing panel of an open position using a winding device from above, and is the figure corresponding to FIG.

Hereinafter, the blowout panel according to the embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the blowout panel 1 according to the present embodiment is provided so that the opening 2A provided in the outer wall 2 of the reactor building can be opened and closed. The opening 2A is formed in a square shape (here, a square) when viewed from the outdoor side in the indoor / outdoor direction.

As shown in FIG. 2, a thin plate-shaped frame plate 3 is fixed to the outdoor side (opening peripheral edge 2a) of the peripheral edge of the opening 2A over the entire circumference. When the closing panel 10 is located at the closing position P1 in which the closing panel 10 is closed, the first airtight packing 13 provided on the closing panel 10 is airtightly contacted with the outdoor surface 3a of the frame plate 3.

The opening 2A is provided with a support flange 21 that projects inward inward in the opening surface and extends over the entire circumference of the opening 2A. A second airtight packing 22 capable of airtightly contacting the indoor side surface 12a of the locking piece 12 of the closing panel 10, which will be described later, is provided on the outdoor side surface of the support flange 21.

Further, the opening 2A is provided with a clip 23 that locks at least the opening / closing tip portion 10b (second side edge portion) of the closing panel 10 of the support flange 21. The clip 23 protrudes from the inner end of the support flange 21 toward the outdoor side and bends toward the outer side in the opening surface inward direction. The closing panel 10 is located at the closing position P1 and is described later. The locking piece 12 of 10 is locked.

As shown in FIGS. 2 to 4, the blowout panel 1 is either a closing panel 10 that closes the opening 2A of the outer wall 2 of the building so that it can be opened and closed from the outdoor side, or a peripheral portion of the closing panel 10 in the left-right direction. The door hinge 11 connecting one of the opening / closing base end portions 10a (first side edge portion) and the opening peripheral edge portion 2a forming the opening opening 2A in the outer wall 2, and the opening / closing tip portion 10b of the closing panel are connected to the opening / closing tip portion 2A. The locking piece 12 (locking member), which is locked to the door and is released from the locked state when the internal pressure of the building exceeds a predetermined value, and the peripheral edge of the opening, which is arranged on the peripheral edge of the closing panel 10. It has a first airtight packing 13 that abuts on 2a, an opening angle regulating chain 14 (straight member) that regulates the opening angle at the opening position P2 of the closing panel 10, and a wire 15a connected to the closing panel 10. A winding device 15 (winding means) capable of winding the wire 15a so as to close the closing panel 10 at the position P2 to the closing position P1 is provided.

As shown in FIG. 2, the closing panel 10 has a plurality of outer plates 10A and inner plates 10B arranged in parallel with each other at intervals, and a plurality of outer plates 10A and inner plates 10B integrally joined to each other. It has a connecting material 10C and. In the closing panel 10, with the opening 2A closed, the outer peripheral end portions 10c located on the four sides are respectively from the inner surface of the opening of the opening 2A in a plan view viewed from the direction orthogonal to the outer plate 10A and the inner plate 10B. Is also located on the outside.

The door hinge 11 is fixed to the first support portion 11A fixed to the opening peripheral edge portion 2a of the outer wall 2 and the peripheral edge portion of the outdoor surface of the closing panel 10, and is centered in the vertical direction with respect to the first support portion 11A. It has a second support portion 11B that is rotatably connected. As shown in FIG. 1, the door hinges 11 are provided at two locations, one near the upper end and the other near the lower end, in the opening / closing base end portion 10a. As a result, the closing panel 10 opens and closes the opening 2A by rotating around the opening peripheral edge 2a via the door hinge 11.

As shown in FIGS. 2 to 4, the locking piece 12 projects like a hook and is provided on the indoor surface of the inner plate 10B over the entire circumference. The locking piece 12 is formed by projecting from the inner plate 10B in the normal direction and being bent inward from the tip thereof in the inward direction of the opening surface. The locking piece 12 is locked to the clip 23 provided in the opening 2A in a state where the closing panel 10 is located at the closing position P1, and the indoor side surface 12a of the locking piece 12 is further provided on the support flange 21. It is in a state of being in airtight contact with the second airtight packing 22.
The locking piece 12 and the clip 23 are locked so that the locked state is released when the internal pressure of the building becomes equal to or higher than a predetermined value and a force in the opening direction of the closing panel 10 is applied. In the present embodiment, the locking piece 12 is configured to be disengaged from the clip 23 by deforming the clip 23.

The first airtight packing 13 is provided on the indoor side end surface of the peripheral edge portion of the inner plate 10B over the entire circumference. The first airtight packing 13 is in airtight contact with the outdoor surface 3a of the frame plate 3 from the outdoor side in a state where the closing panel 10 is closed at the closing position P1.
Here, the airtight performance of the blowout panel 1 is the performance of preventing the diffusion of radioactive substances in the reactor building. Specifically, in order to maintain the internal pressure of the building below the atmospheric pressure and satisfy the performance of trapping radioactive materials, the A3 and A4 grades specified in "JIS A 4702 Door Set Airtightness" are required. It is preferable to do so.

As shown in FIG. 3, the open angle regulation chain 14 is composed of one metal chain, one end of which is fixed to the opening 2A, and the other end of which is closer to the opening / closing tip portion 10b of the inner plate 10B of the closing panel 10. It is fixed in position. The length of the open angle restricting chain 14 is set to a length at which the closing panel 10 stops at the open position P2 at a predetermined open angle. Further, the opening angle restricting chain 14 is of sufficient strength so as not to be cut when the closing panel 10 is opened when the internal pressure of the building exceeds a predetermined value.

As shown in FIG. 4, the take-up device 15 is provided on a support steel material 24 provided so as to project inward from the indoor side surface of the outer wall 2 in the in-plane direction of the opening 2A, and windable wire 15a is provided. It is an electric take-up type device equipped. The tip of the wire 15a is connected to a position closer to the opening / closing tip 10b of the inner plate 10B of the closing panel 10. In the winding device 15, the wire 15a is in a state in which the wire 15a can be unwound in a normal state, and the wire 15a is pulled out from the winding device 15 when the closing panel 10 is opened. The drawn wire 15a can be wound by remotely controlling the winding device 15, and the closed closing panel 10 in the opened state can be closed to the closing position P1.

Next, the operation of the blowout panel 1 will be described in detail with reference to the drawings.
As shown in FIGS. 2 and 3, in the blowout panel 1 according to the present embodiment, when the internal pressure of the reactor building rises, a predetermined value or more is set with respect to the closed panel 10 in the closed state at the closed position P1. When the stress of the above is applied, the locked state between the clip 23 and the locking piece 12 is released, and the closing panel 10 is opened. As a result, the internal and external spaces of the building can communicate with each other through the opening 2A, and the internal pressure of the building can be reduced. At this time, the closing panel 10 rotates and opens around the door hinge 11 provided at the opening / closing base end portion 10a, and the closing panel 10 stops at the opening position P2 whose opening angle is restricted by the opening angle restricting chain 14. become.

Therefore, it is possible to prevent the door hinge 11 which is a connecting portion with the opening peripheral edge portion 2a from being destroyed by the opening momentum of the closing panel 10, and it is possible to prevent the closing panel 10 from falling when the closing panel 10 is opened.
Then, as shown in FIG. 4, the wire 15a connected to the closing panel 10 is wound by the winding device 15 at an appropriate timing when the inside of the building is surely confirmed after the closing panel 10 is opened. , The closing panel 10 can be returned to the original closing position P1 to close the opening 2A.

Further, when the closing panel 10 is closed, the first airtight packing 13 and the second airtight packing 22 provided on the peripheral edge of the closing panel 10 are in contact with the opening peripheral edge 2a, so that the building in the opening 2A is in contact with the opening peripheral edge 2a. The airtightness inside can be increased.

Further, in the present embodiment, since the two door hinges 11 are provided, the closing panel 10 can be closed in a stable posture at the closing position P1. Therefore, the first airtight packing 13 provided on the entire circumference of the closing panel 10 can be evenly pressed against the opening peripheral edge portion 2a of the outer wall 2 over the entire circumference, and higher airtightness can be ensured.

As described above, in the blowout panel according to the present embodiment, higher airtightness can be ensured, and the opening 2A of the building can be closed at an appropriate timing when the inside of the building is surely confirmed.

Although the embodiment of the blowout panel according to the present invention has been described above, the present invention is not limited to the above-described embodiment and can be appropriately modified without departing from the spirit of the present invention.

For example, in the present embodiment, the opening / closing base end portion 10a of the closing panel 10 is provided with two door hinges 11 and 11, but the number of door hinges 11 is limited to two. It may be singular (1) or 3 or more.

Further, in the present embodiment, the second airtight packing 22 is provided, but the second airtight packing 22 can be omitted.

Further, in the present embodiment, the electric winding device 15 is adopted as the winding means, but the winding means having another configuration may be used.

Further, in the present embodiment, the opening angle restricting chain 14 is a linear member that regulates the opening angle of the closing panel 10, but other members such as wires may be adopted instead of the chain. For example, the wire of a winding device such as a hoist can also be used as a wire member. In the case of a hoist wire (straight member), the closing panel 10 is returned to the original closing position P1 by winding the wire that regulates the opening angle when the closing panel 10 is opened by a winding means. The opening 2A can be closed. Further, it is not necessary to separately provide the wire member and the wire, and when the magnitude of the force applied to the hoist when the closing panel 10 is opened is small, a simple structure can be obtained.
Depending on the magnitude of the force applied to the hoist when the closing panel 10 is opened, a stopper function is provided in the middle so that the wire does not wind up directly on the hoist but extends only to a certain length, and the closing panel 10 is provided. A mechanism may be provided so that a large force is not directly applied to the hoist by receiving the force applied at the time of opening the hoist with the stopper.

Further, the wire of the winding means may also be used as a linear member as described above, or may be provided with a function of regulating the opening angle at the open position of the closing panel in the same manner as the linear member. It may be used together.

The configuration such as the front view shape, plate thickness, and position of the airtight packing of the closing panel 10 can be appropriately changed according to conditions such as the size of the opening 2A and the size of the internal pressure assumed in the building. Is.

In addition, it is possible to replace the components in the above-described embodiment with well-known components as appropriate without departing from the spirit of the present invention.

1 Blowout panel 2 Outer wall 2A Opening 2a Opening peripheral 10a Closing panel 10a Opening / closing base end (first side edge)
10b Opening and closing tip (second side edge)
11 Door hinge 12 Locking piece (locking member)
13 1st airtight packing 14 Open angle regulation chain (straight member)
15 Winding device (winding means)
15a Wire 22 2nd airtight packing 23 Clip (locking member)
P1 closed position P2 open position

Claims (3)

A closing panel that closes the opening of the outer wall of the building so that it can be opened and closed from the outdoor side,
A door hinge connecting the first side edge portion of one of the closing panels in the left-right direction and the opening peripheral portion forming the opening portion in the outer wall.
A locking member that locks the other second side edge of the closing panel to the opening and releases the locked state when the internal pressure of the building exceeds a predetermined value.
An airtight packing arranged on the peripheral edge of the closing panel and in contact with the peripheral edge of the opening,
A linear member that regulates the opening angle of the closing panel at the open position, and
A winding means having a wire connected to the closing panel and capable of winding the wire so as to close the closing panel in the open position to the closing position.
A blowout panel characterized by being equipped with. The blowout panel according to claim 1, wherein a plurality of door hinges are provided at the first side edge portion of the closing panel at intervals in the vertical direction. The blowout panel according to claim 1 or 2, wherein the linear member is the wire of the winding means.

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