JP2022079061A - Opening device for blowout panel - Google Patents

Abstract

To provide an opening device for a blowout panel that can secure a large open area of an opening part.SOLUTION: The opening device for a blowout panel is an opening device for a blowout panel which closes an opening part formed in a wall part of a nuclear reactor building. The opening device includes: a driving unit located in a position in the inside of the nuclear reactor building, the position being overlapped with the opening part in a front view of the opening part, the driving unit being capable of pressing the blowout panel to the outside of the opening part; and a supporting mechanism having a base end part fixed to a part off the opening part in the nuclear reactor building and a top end part for supporting the driving unit.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to a blowout panel opening device.

In the reactor building, an opening of several meters square is formed in order to release the internal pressure in an emergency. This opening is normally closed by a member called a blowout panel (see Patent Document 1 below). In case of an emergency, it is possible to release the internal pressure through the opening by opening the blowout panel.

In order to reliably open such a blowout panel, an opening device may be provided at the opening.

Japanese Patent No. 6603000

In the above case, it is desired to secure the opening area as large as possible so as not to hinder the release of the internal pressure of the building while providing the opening device in the opening.

The present disclosure has been made to solve the above problems, and an object of the present invention is to provide a blowout panel opening device capable of securing a large opening area of an opening.

In order to solve the above problems, the blowout panel opening device according to the present disclosure is a blowout panel opening device that closes an opening formed in a wall portion of the reactor building, and is a blowout panel opening device of the reactor building. Inside, a drive unit located in a region overlapping the opening in front view of the opening and capable of pushing the blowout panel toward the outside of the opening, and the opening inside the reactor building. It includes a base end portion fixed to a portion detached from the portion, and a support mechanism having a tip portion for supporting the drive portion.

According to the present disclosure, it is possible to provide a blowout panel opening device capable of ensuring a large opening area of an opening.

It is a schematic diagram which shows the structure of the reactor building which concerns on embodiment of this disclosure. It is a figure which looked at the opening, the blowout panel and the opening device which concerns on embodiment of this disclosure from the inside of a reactor building. FIG. 2 is a cross-sectional view taken along the line III-III of FIG. It is a figure which shows the 1st modification of the support mechanism which concerns on embodiment of this disclosure. It is a figure which shows the 2nd modification of the support mechanism which concerns on embodiment of this disclosure. It is a figure which shows the 3rd modification of the support mechanism which concerns on embodiment of this disclosure.

(Structure of reactor building)
Hereinafter, the blowout panel opening device 90 (hereinafter, simply referred to as “opening device 90”) according to the embodiment of the present disclosure will be described with reference to FIGS. 1 to 3.

As shown in FIG. 1, the reactor building 1 is a box-shaped structure that houses a reactor inside. An opening H for releasing the internal pressure in the event of an emergency is formed on the side wall 1S of the reactor building 1. The opening H forms a rectangle of 4 m square as an example. Although FIG. 1 shows an example in which only one opening H is formed, the number of openings H may be two or more. This opening H is normally closed by the blowout panel 2. The blowout panel is held in a state of being fitted to the opening H by a clip (not shown).

Opening devices 90 are provided at each of the four corners of the blowout panel 2. The opening device 90 is a device for pressing the blowout panel 2 to separate it from the opening H (that is, opening the opening H). As an example, each opening device 90 is arranged along a pair of edges extending in the vertical direction of the opening H. In the following description, the outside of the reactor building 1 is simply referred to as "outside" and the opposite side thereof is simply referred to as "inside" with respect to the opening H. Further, the direction connecting the outside and the inside (that is, the opening direction of the opening H when the side wall 1S is viewed from the front) is referred to as "inside / outside direction".

Although not shown in detail, a closing device for closing the opening H again after the blowout panel 2 is detached and the opening H is opened in the vicinity of the opening H on the outside of the side wall 1S. Is provided. The closing device has, for example, a shutter shape, and can close the opening H by being deployed along the side wall 1S.

Next, with reference to FIGS. 2 and 3, the configuration of the opening H, the blowout panel 2, and the opening device 90 will be described in detail.

(Composition of opening)
As shown in FIG. 2, the reactor building 1 further includes a columnar cross beam 1A extending in the horizontal direction, a plurality of vertical beams 1B extending in the vertical direction, and a wall portion 1W. The plurality of vertical beams 1B are arranged at intervals in the horizontal direction. The wall portion 1W has a plate shape connecting between these vertical beams 1B. In the example of FIG. 2, one cross beam 1A is spread over the opening H. The cross beam 1A, the vertical beam 1B, and the wall portion 1W are integrally formed of, for example, reinforced concrete.

The opening H is formed on the wall portion 1W. The opening H has a pair of vertical edge edges 2A extending in the vertical direction and a pair of horizontal edge edges 2B extending in the horizontal direction to form a rectangle as a whole. A rectangular annular frame 1R is attached to the inside of the opening H. The blowout panel 2 is held by a clip (not shown) with respect to the frame body 1R.

(Blowout panel configuration)
The blowout panel 2 is a rectangular plate-shaped member that closes the opening H. The blowout panel 2 has a plate-shaped panel main body 2H and a reinforcing material 2R provided on a surface facing the inside of the panel main body 2H. The reinforcing material 2R is provided to supplement the strength of the panel main body 2H. The reinforcing members 2R are arranged in a grid pattern by projecting inward from the panel main body 2H and extending in the vertical direction and the horizontal direction.

(Configuration of opening device)
The opening device 90 is fixed on the inward facing surface of the vertical beam 1B. In the present embodiment, two opening devices 90 are arranged on one vertical beam 1B at intervals in the vertical direction. The opening device 90 extends horizontally from the vertical end edge 2A of the opening H toward the opening H. The opening device 90 includes a support mechanism 3 and a drive unit 4.

The support mechanism 3 is provided to support the drive unit 4 (described later) in the vicinity of the opening H (that is, a portion deviated from the opening H). The support mechanism 3 has a base plate 31, a base end portion 32, a tip end portion 33, and a shim S. The base plate 31 has a plate shape and is fixed by bolts (not shown) in a state of being in surface contact with the vertical beam 1B. It is desirable that the inner diameter of the bolt insertion hole formed in the base plate 31 is set to be larger than the outer diameter of the bolt. This makes it possible to finely adjust the position of the opening device 90 in the vertical direction.

The base end portion 32 has a columnar shape extending horizontally from the inward facing surface of the base plate 31 toward the opening H. The base end portion 32 is fixed to the base plate 31 by welding or the like. As shown in FIG. 3, the base end portion 32 has a columnar base end portion main body 32H and a first flange 32F provided at an end portion of the base end main body 32H on the opening H side. There is. The first flange 32F extends in a plane orthogonal to the extending direction of the base end main body 32H.

The tip portion 33 extends from the end portion of the base end portion 32 toward the opening H side. The tip portion 33 is provided to hold the drive portion 4. The tip portion 33 has a second flange 33F, a first portion 33A, and a second portion 33B. The second flange 33F is detachably fixed to the first flange 32F by bolts (not shown) in a state of facing the first flange 32F via the shim S. That is, the second flange 33F also extends in a plane orthogonal to the horizontal direction like the first flange 32F. The shim S is a plate-shaped member provided for adjusting the distance between the first flange 32F and the second flange 33F. By preparing a plurality of types of shims S having different thicknesses, it is possible to adjust the distance between the first flange 32F and the second flange 33F to a desired value.

The first portion 33A has a columnar shape extending from the second flange 33F toward the opening H. The second portion 33B extends outward from the end of the first portion 33A on the opening H side. That is, when viewed from the vertical direction, the second portion 33B intersects the first portion 33A at a right angle. The outer end of the second portion 33B faces the wall portion 1W at intervals in the inward and outward directions. Further, the second portion 33B is arranged at a position overlapping the above-mentioned frame body 1R in the horizontal direction.

The drive unit 4 is fixed on the end face of the second portion 33B facing the opening H side. Although not shown in detail, the drive unit 4 is fixed to the second portion 33B by a bolt. The hole through which the bolt is inserted is a long hole having a long axis in the inner and outer directions in order to realize precise positioning of the drive unit 4. The drive unit 4 applies an outward pressing force to the blowout panel 2. Specifically, as the drive unit 4, an air cylinder having a rod 4R that moves in and out in the inward and outward directions by air pressure, and a housing 4H that accommodates the rod 4R and the cylinder is preferably used. It is also possible to use a hydraulic cylinder or an electric actuator as the drive unit 4.

The tip of the rod 4R can come into contact with the inner surface 2S of the blowout panel 2. In other words, the drive unit 4 is provided at a position overlapping the opening H when viewed from the inside and outside. Further, in other words, the dimensions of each part of the support mechanism 3 are adjusted so that the drive part 4 overlaps with the opening H.

Further, in the present embodiment, of the opening device 90, only the driving unit 4 is exposed in the opening H. That is, the support mechanism 3 is not exposed to the opening H when viewed from the inside and outside. (Depending on the design and specifications, it is also possible to adopt a configuration in which a part of the support mechanism 3 is exposed in the opening H.) Further, as shown in FIG. 2 again, the drive unit 4 (rod). 4R) is provided at a position where only the reinforcing material 2R of the blowout panel 2 can be pressed. In other words, the pressing force of the rod 4R does not reach the panel body 2H.

(Action effect)
Next, the operation of the opening device 90 will be described with reference to FIG. In the event of an emergency, the internal pressure of the reactor building 1 may increase. In this case, first, the blowout panel 2 is detached from the opening H outward by the internal pressure itself, and the opening H is opened. This makes it possible to release the internal pressure.

On the other hand, it is also possible that the blowout panel 2 does not detach due to the internal pressure alone for some reason, or that the blowout panel 2 is to be opened even though the internal pressure has not increased so much, such as wanting to use an opening for water injection. Be done. In preparation for such a case, the opening device 90 according to the present embodiment is provided. When operating the opening device 90, the driving unit 4 is driven by an electric signal transmitted from a remote location. As a result, the rods 4R of the four drive units 4 advance toward the outside. As a result, the blowout panel 2 is pressed outward and detached from the opening H. With the detachment of the blowout panel 2, the internal pressure of the reactor building 1 is released from the opening H. Even when the internal pressure does not increase to that extent, the blowout panel 2 can be detached so that the opening can be used for the purpose of water injection or the like.

In such a case, it is desired to secure the opening area as large as possible so as not to hinder the release of the internal pressure of the building while providing the opening device in the opening.

Therefore, in this embodiment, each of the above configurations is adopted. According to the above configuration, the base end portion 32 of the support mechanism 3 is fixed to the portion separated from the opening portion H. That is, the base end portion 32 is fixed to the reactor building 1 side in a cantilever shape. Therefore, it is possible to reduce the possibility that the opening area of the opening H is impaired by the base end portion 32 as compared with the case where the base end portion 32 extends so as to cross the opening portion H. This makes it possible to more smoothly guide the gas filled in the reactor building 1 to the outside through the opening H. Therefore, the restoration work in case of an emergency can be performed more quickly and smoothly.

Further, according to the above configuration, the base end portion 32 and the tip end portion 33 are removable. Thereby, for example, when performing maintenance on the blowout panel 2, the tip end portion 33 can be removed from the base end portion 32. Therefore, the accessibility to the blowout panel 2 is improved, and maintenance can be performed more easily. On the other hand, if the tip portion 33 is not removable, the accessibility to the blowout panel 2 from the inside is impaired, which may hinder maintenance. According to the above configuration, such a possibility can be reduced.

In addition, according to the above configuration, a shim S is provided between the base end portion 32 and the tip end portion 33. By variously changing the thickness of the shim S, the position where the drive unit 4 presses the blowout panel 2 (that is, the position of the drive unit 4 in the horizontal direction) can be adjusted more precisely. As a result, the pressing portion by the drive unit 4 is optimized, so that the opening device 90 can be operated more stably.

Furthermore, according to the above configuration, the drive unit 4 is arranged at a position where the reinforcing material 2R of the blowout panel 2 can be pressed. This makes it possible to further reduce the possibility that the blowout panel 2 will be damaged when pressed by the drive unit 4, as compared with a configuration in which a portion where the reinforcing member 2R is not provided is pressed. Further, since the pressing force on the blowout panel 2 is dispersed and applied to the entire blowout panel 2 via the reinforcing material 2R, the pressing force is evenly applied to the blowout panel 2 and is more smoothly desorbed. It is possible to make it.

Further, according to the above configuration, only the drive unit 4 is exposed in the opening H when viewed from the inside and outside. Therefore, for example, the possibility that the opening area of the opening H is impaired can be further reduced as compared with the case where a part of the support mechanism 3 is also exposed in the opening H. This makes it possible to more smoothly guide the gas flow through the opening H to the outside. Therefore, the restoration work in case of an emergency can be performed more quickly and smoothly.

Further, according to the above configuration, a plurality of opening devices 90 are provided along the edge of the opening H. By operating these opening devices 90 at the same time, the pressing force is evenly applied to the blowout panel 2 at a plurality of places, so that the blowout panel 2 can be more stably and smoothly detached.

(Other embodiments)
The embodiments of the present disclosure have been described above. It is possible to make various changes and modifications to the above configuration as long as it does not deviate from the gist of the present disclosure.

For example, in the above embodiment, an example in which the support mechanism 3 is fixed on the vertical beam 1B has been described. However, the mode of fixing the support mechanism 3 is not limited to the above. As shown in FIG. 4 as a first modification, the support mechanism 3 further has a steel frame 80 spanned between the cross beam 1C arranged on the ceiling of the reactor building 1 and the floor surface 1F. Is also possible. The steel frame 80 is used, for example, when the opening device 90 is installed in a place where the above-mentioned vertical beam 1B is not arranged. In this case, an example in which the steel frame 80 is attached to the lower surface or the side surface of the cross beam 1C can be considered.

Further, as shown in FIG. 5 as a second modification, it is also possible to adopt a configuration in which the opening device 90 is directly fixed to the ceiling surface 1D and the floor surface 1F of the reactor building 1. In this case, as shown in the figure, each opening device 90 is fixed in a posture extending in the vertical direction. Similar to the first modification, it is used when the opening device 90 is installed in a place where the above-mentioned vertical beam 1B is not arranged. Further, even when spaces cannot be secured on both sides of the opening H in the horizontal direction, the configuration can be suitably used.

In addition, as shown in FIG. 6 as a third modification, it is possible to change the shape of the support mechanism 3 in some of the opening devices 90. In the example of the figure, of the four opening devices 90, two opening devices 90 located below further have an auxiliary support mechanism 3C as a part of the support mechanism 3. The auxiliary support mechanism 3C comprises a pair of horizontal portions C1 extending in the horizontal direction and arranged at intervals in the vertical direction, and a connecting portion C2 connecting the ends of the horizontal portions C1 on the opening H side. Have. The horizontal portion C1 is fixed to the end face of the vertical beam 1B facing the opening H side. The above-mentioned base end portion 32 is fixed at an intermediate position in the vertical direction of the connecting portion C2. For example, in order to prevent interference between the equipment and the opening device 90 at a location where other equipment is arranged in the vicinity of the vertical beam 1B, such a configuration can be used.

Further, in the above embodiment, an example in which flanges (first flange 32F and second flange 33F) are used as a mode of connecting the base end portion 32 and the tip end portion 33 has been described. However, the mode of connection between the base end portion 32 and the tip end portion 33 is not limited to the flange. As another example, it is also possible to use, for example, an in-row joint or a mechanical connector structure.

Further, in the above embodiment, an example in which four opening devices 90 are provided in one opening H has been described. However, the number of opening devices 90 is not limited to four, and may be three or less or five or more depending on the size of the opening H.

Further, the position where the opening device 90 is installed is not limited by the above-described embodiment or each modification, and the opening device is located near the opening H and can be fixed at any position as long as the support mechanism 3 can be fixed. It is possible to install 90.

<Additional Notes>
The opening device 90 of the blowout panel 2 described in each embodiment is grasped as follows, for example.

(1) The opening device 90 of the blowout panel 2 according to the first aspect is the opening device 90 of the blowout panel 2 that closes the opening H formed in the wall portion 1W of the reactor building 1. With a drive unit 4 located inside the reactor building 1 in a region overlapping the opening H in front view of the opening H and capable of pressing the blowout panel 2 toward the outside of the opening H. A base end portion 32 fixed to a portion outside the opening H inside the reactor building 1, and a support mechanism 3 having a tip portion 33 for supporting the drive portion 4 are provided.

According to the above configuration, the base end portion 32 of the support mechanism 3 is fixed to the portion separated from the opening portion H. That is, the base end portion 32 is fixed to the reactor building 1 side in a cantilever shape. Therefore, it is possible to reduce the possibility that the opening area of the opening H is impaired by the base end portion 32 as compared with the case where the base end portion 32 extends so as to cross the opening portion H.

(2) In the opening device 90 of the blowout panel 2 according to the second aspect, the base end portion 32 and the tip end portion 33 are detachably fastened to each other.

According to the above configuration, the base end portion 32 and the tip end portion 33 are removable. Thereby, for example, when performing maintenance on the blowout panel 2, the tip end portion 33 can be removed from the base end portion 32. Therefore, the accessibility to the blowout panel 2 is improved, and maintenance can be performed more easily.

(3) The opening device 90 of the blowout panel 2 according to the third aspect further has a shim S provided between the base end portion 32 and the tip end portion 33.

According to the above configuration, a shim S is provided between the base end portion 32 and the tip end portion 33, and the thickness of the shim S is variously changed so that the position where the drive unit 4 presses the blowout panel 2 can be determined. It can be adjusted more finely. As a result, the opening device 90 can be operated more stably.

(4) In the opening device 90 of the blowout panel 2 according to the fourth aspect, the blowout panel 2 has a panel main body 2H covering the opening H and the inside of the reactor building 1 in the panel main body 2H. It has a reinforcing material 2R provided on the surface, and the driving unit 4 is arranged at a position where the reinforcing material 2R can be pressed.

According to the above configuration, the drive unit 4 is arranged at a position where the reinforcing material 2R of the blowout panel 2 can be pressed. This makes it possible to further reduce the possibility that the blowout panel 2 will be damaged when pressed by the drive unit 4, as compared with a configuration in which a portion where the reinforcing member 2R is not provided is pressed. Further, since the pressing force on the blowout panel 2 is dispersed and applied to the entire blowout panel 2 via the reinforcing member 2R, the blowout panel 2 can be separated more smoothly.

(5) In the opening device 90 of the blowout panel 2 according to the fifth aspect, only the driving unit 4 is exposed inside the opening H when viewed from the opening direction of the opening H.

According to the above configuration, since only the driving unit 4 is exposed inside the opening H, the possibility that the opening area of the opening H is impaired can be further reduced.

(6) A plurality of opening devices 90 of the blowout panel 2 according to the sixth aspect are arranged at intervals along the edge of the opening H.

According to the above configuration, since a plurality of opening devices 90 are provided, the blowout panel 2 can be more stably and smoothly detached by operating these opening devices 90 at the same time.

1 Reactor building 1A Horizontal beam 1B Horizontal beam 1C Horizontal beam 1D Ceiling surface 1R Frame body 1S Side wall 1W Wall part 2 Blowout panel 2A Vertical end edge 2B Horizontal end edge 2H Panel body 2R Reinforcing material 2S Inner surface 3 Support mechanism 3C Auxiliary support mechanism 4 Drive 4H Housing 4R Rod 31 Base plate 32 Base plate 32 H Base body 32F First flange 33 Tip 33A First part 33B Second part 33F Second flange 80 Steel frame 90 Opening device C1 Horizontal part C2 Connection part H Opening S shim

Claims (6)

It is a blowout panel opening device that closes the opening formed in the wall of the reactor building.
A drive unit located inside the reactor building, located in a region overlapping the opening in front view of the opening, and capable of pressing the blowout panel toward the outside of the opening.
A support mechanism having a base end portion fixed to a portion of the inside of the reactor building outside the opening, and a tip portion for supporting the drive portion.
A blowout panel opening device equipped with. The blowout panel opening device according to claim 1, wherein the base end portion and the tip end portion are detachably fastened to each other. The blowout panel opening device according to claim 1 or 2, further comprising a shim provided between the base end portion and the tip end portion. The blowout panel is
The panel body that covers the opening and
Reinforcing material provided on the inner surface of the reactor building in the panel body, and
Have,
The blowout panel opening device according to any one of claims 1 to 3, wherein the drive unit is arranged at a position where the reinforcing material can be pressed. The blowout panel opening device according to any one of claims 1 to 4, wherein only the driving portion is exposed in the opening when viewed from the opening direction of the opening. The blowout panel opening device according to any one of claims 1 to 5, wherein a plurality of blowout panels are arranged at intervals along the edge of the opening.

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