JP2020201067A - Blowout device - Google Patents

Abstract

To reduce burden on a chain due to inertial force in an opening/closing direction of a closing door in an earthquake.SOLUTION: In order to solve the above problem, a blowout device of the present invention comprises; a closing panel that is provided at openings 20A3, 20A4 of a reactor building, and opens when the internal pressure of the reactor building exceeds a predetermined value; guide rails provided above and below the closing panel; a closing door slidably installed along the guide rail so as to cover the closing panel; support members 20A1, 20A2 that suppress the movement of the closing door in an opening/closing direction based on the shaking during an earthquake; and driving means of driving the support members in an out-of-plane direction of the closing door.SELECTED DRAWING: Figure 5

Description

The present invention relates to a blowout device, and more particularly to a blowout device installed to release the internal pressure of the reactor building when the internal pressure rises and prevent the reactor building from exploding.

In the 2011 off the Pacific coast of Tohoku Earthquake that occurred on March 11, 2011, a severe accident occurred in which the internal pressure of the reactor building increased due to the loss of power to the plant at the Fukushima Daiichi Nuclear Power Station, causing a part of the reactor building to explode. Occurred. Along with this, the Nuclear Regulatory Commission (NRA) is requesting the strengthening of measures against severe accidents at nuclear power plants.

As an example of the countermeasure, there is a blowout device installed in the reactor building. This blowout device opens the opening of the reactor building to prevent the reactor building from exploding when the internal pressure of the reactor building increases, and when the internal pressure of the reactor building decreases, the reactor building It closes the opening.

Patent Document 1 describes a blowout device related to a blowout device attached to the reactor building, which can be quickly closed and restored when the opening of the reactor building is opened.

In Patent Document 1, a hinge is attached to the opening frame of the reactor building, a closing panel attached by a fixing device that is destroyed when the internal pressure of the reactor building exceeds a predetermined value, and the closing panel. A blowout device equipped with a wire to which one end is attached, a pressure gauge that measures the internal pressure of the reactor building, and a panel restoration device that winds up the other end of the wire in response to the measured value of the pressure by this pressure gauge. Have been described.

Japanese Unexamined Patent Publication No. 2009-121917

By the way, the blowout device attached to the reactor building includes a case where the blowout panel attached to the opening of the reactor building has an opening function and a closing function, and a blowout panel having an opening function and a blow having a closing function. Two devices, an out-panel closing device, may be used.

The blowout device of Patent Document 1 described above can be quickly closed and restored after the opening operation by the former blowout panel having the opening and closing functions.

The blowout panel in Patent Document 1 can simplify the structure and lead to cost reduction, but if the blowout panel itself is damaged by a severe accident, the function cannot be maintained.

In addition, since blowout panels are often installed on high-altitude floors of nuclear power plants, remodeling work has been carried out so that the blowout panels already installed in existing plants have the above-mentioned closing function. It is complicated to apply. Another problem is that on a high altitude floor, it is not possible to secure a lot of space for installing equipment inside.

On the other hand, in the case of a blowout device that uses two devices, a blowout panel and a blowout panel closing device, even if the blowout panel is damaged during a severe accident, the blowout panel closing device closes the opening of the reactor building. And can trap radiation.

In this way, by using a blowout device that separates the opening function and the closing function into two devices, reliability can be improved from the viewpoint of maintaining the function, and the blowout panel closing device is the reactor building. It is easy to apply to existing plants because it can be added to the outside of the plant.

From the above viewpoint, in the current blowout device, it is the mainstream to carry out the opening and closing functions of the reactor building by using two devices, the blowout panel and the blowout panel closing device.

The blowout panel closing device generally has a mechanism in which a sliding hanging door (closing door) moves electrically to close the opening of the reactor building, and a drive device with a sprocket and a chain open and close the closing door. It has a function.

Since the chain is loaded by the inertial force in the opening / closing direction of the door, it is vulnerable to earthquake motion in the opening / closing direction, and the chain may break. Therefore, it is necessary to improve the structural reliability of the blowout panel closing device by reducing the load applied to the chain.

The present invention has been made in view of the above points, and an object of the present invention is to provide a blowout device capable of reducing a load on a chain due to an inertial force in the opening / closing direction of a closing door at the time of an earthquake. is there.

In order to achieve the above object, the blowout device of the present invention has a closing panel that opens at the opening of the reactor building when the internal pressure of the reactor building exceeds a predetermined value, and an upper and lower closing panel of the closing panel. The guide rail provided in the above, the closing door slidably installed along the guide rail so as to cover the closing panel, and the movement of the closing door in the opening / closing direction based on the shaking during an earthquake is suppressed. It is characterized by including a support member for driving the support member and a driving means for driving the support member in an out-of-plane direction of the closing door.

According to the present invention, it is possible to reduce the load on the chain due to the inertial force in the opening / closing direction of the closing door during an earthquake.

It is the 1st embodiment of the blowout apparatus of this invention, and is the figure which shows the closed door open state in the whole structure of the state installed in the reactor building. It is the 1st embodiment of the blowout apparatus of this invention, and is the figure which shows the closed state in the whole structure of the state installed in the reactor building. It is an enlarged view of the part A in FIG. FIG. 3 is a cross-sectional view taken along the line AA of FIG. 3, showing an opening / closing operation in a normal state. FIG. 3 is a cross-sectional view taken along the line AA of FIG. 3 and is a diagram showing an opening / closing operation during an earthquake. It is an example of another shape of the support member in Example 1 of the blowout device of this invention, and is the figure corresponding to FIG. 2 is a second embodiment of the blowout device of the present invention, and is a diagram showing a normal opening / closing operation corresponding to FIG. 2 is a second embodiment of the blowout device of the present invention, and is a diagram showing an opening / closing operation at the time of an earthquake corresponding to FIG. It is an example of another shape of the extrusion member in Example 2 of the blowout device of this invention, and is the figure corresponding to FIG. It is an example of a different shape from FIG. 9 of the extrusion member in the second embodiment of the blowout device of the present invention, and is a diagram corresponding to FIG. 7. It is a top view which shows the support structure in the opening / closing direction in a normal state in Example 3 of the blowout apparatus of this invention. It is a front view which shows the support structure in the opening / closing direction in a normal state in Example 3 of the blowout apparatus of this invention. It is a side view which shows the support structure in the opening / closing direction in a normal state in Example 3 of the blowout apparatus of this invention. It is sectional drawing along the line BB of FIG. 12, and is the figure which shows the opening and closing operation in a normal state. It is sectional drawing along the line BB of FIG. 12, and is the figure which shows the opening and closing operation at the time of an earthquake.

Hereinafter, the blowout device of the present invention will be described based on the illustrated examples. In each of the embodiments described below, the same reference numerals are used for the same components.

FIG. 1 is a view showing the open state of the closing door in the overall configuration of the blowout device installed in the reactor building according to the first embodiment of the blowout device of the present invention, and FIG. 2 shows the closing door in the closed state. It is a figure which shows.

The blowout device of the present embodiment shown in the figure is provided with a closing panel (blowout panel) 2 installed on the outdoor wall 1 of the building and a fall prevention chain 3 for supporting the closing panel (blowout panel) 2, and a frame 4 and an upper rail are provided on the outside thereof. 5. It has a lower rail 6. Hanger rollers 14 are provided at three locations on the upper rail 5, and the closing door 13 is hung by the hanger rollers 14 at the three locations to support its own weight.

Further, the hanger roller 14 and the chain guide 17 are fastened with bolts or the like, the chain 16 is contained in the chain guide 17, and both ends of the chain 16 are fixed with end bolts. The drive device 15 such as a motor installed in the central portion of the upper rail 5 has a structure in which the closing door 13 slides in the opening / closing direction (Y direction in FIG. 1) by pulling the chain 16.

As shown in FIG. 2, when the closing door 13 is in the closed state, the upper tapered block 10, the lower tapered block 11, and the side surface tapered block 12 provided on the upper, lower, and side surfaces of the closing door 13, respectively, By engaging with the upper push roller 7, the lower push roller 8 and the side surface push roller 9 installed on the upper rail 5, the lower rail 6 and the frame 4, respectively, the closing door 13 is in the out-of-plane direction (X direction in FIG. 2). ) Is suppressed.

Further, regardless of whether the closing door 13 is opened or closed, the frame 4 is provided with a latch 18 and the closing door 13 is provided with a latch 19 as a support structure in the opening / closing direction of the closing door 13, and these are combined to close the closing door 13 in the opening / closing direction. It supports the inertial force of the door 13 due to the earthquake.

An enlargement of the upper bush roller 7 and the upper taper block 10 in FIG. 2 (part A in FIG. 2) is shown in FIG.

The upper taper block 10 shown in FIG. 3 has a trapezoidal shape as shown in FIG. 4, and when the closing door 13 moves and is in the closed state, the cylindrical upper push roller 7 has a trapezoidal shape of the upper taper block 10. Climb from the legs to the upper bottom (from bottom to top in FIG. 4) to suppress the out-of-plane direction (X direction in FIG. 3) of the closing door 13.

A cross section along the line AA in FIG. 3 is shown in FIG.

FIG. 4 shows a detailed cross section of the upper bush roller 7 and the upper taper block 10 in the opening / closing operation in a normal state, and columnar support members 20A1 and 20A2 are installed inside the upper taper block 10. Coil 22A and 22B are arranged on the circumference of each of the support members 20A and 20A2. The support members 20A1 and 20A2 are provided with stoppers 21A1 and 21A2 protruding in the radial direction, respectively, and the stoppers 21A and 21A2 limit the amount of the support members 20A1 and 20A2 protruding to the outside.

Further, the support members 20A1 and 20A2 have openings 20A3 and 20A4 formed on the opposite side (upper side in FIG. 4) to the side protruding to the outside (out-of-plane direction), respectively, and the openings 20A3 and 20A4 are formed in the openings 20A3 and 20A4, respectively. Contains springs 23A and 23B, one end of which is connected to each of the support members 20A1 and 20A2 and the other end of which is connected to the upper taper block 10. The springs 23A and 23B have a natural length during normal operation (during opening / closing operation), and the restoring force does not work.

Further, the coils 22A and 22B arranged on the circumferences of the support members 20A1 and 20A2 are connected to the earthquake detection mechanism 24, and normally the switch is OFF and no current flows.

FIG. 5 shows the operation of the upper bush roller 7 and the upper taper block 10 during an earthquake from the normal state of FIG.

As shown in FIG. 5, at the time of an earthquake, the earthquake detection mechanism 24 detects the shaking, the switch is turned on, and the current 25 flows through the coils 22A and 22B. Electromagnetic forces 26A and 26B are generated by the current 25 flowing through the coils 22A and 22B, and the springs 23A and 23B are extended by the electromagnetic forces 26A and 26B, and the support members 20A1 and 20A2 are external from the bottom of the upper tapered block 10 (FIG. 5). It protrudes downward), and the protruding portion of the upper tapered block 10 suppresses the movement of the upper push roller 7 in the opening / closing direction (horizontal direction in FIG. 5) to support the inertial force in the opening / closing direction of the closing door 13. It is a mechanism.

At this time, the amount of protrusion of the support members 20A1 and 20A2 from the bottom of the upper taper block 10 to the outside is limited by the stoppers 21A1 and 21A2.

When the shaking of the earthquake subsides, the switch is turned off by the earthquake detection mechanism 24 to stop the current 25 from flowing through the coils 22A and 22B, so that the electromagnetic forces 26A and 26B do not work.

The support members 20A1 and 20A2 are accommodated inside the upper taper block 10 by the restoring force that the springs 23A and 23B stretched by the electromagnetic forces 26A and 26B try to return to their natural lengths, and the closing door 13 can be opened and closed again.

Here, an example of another shape of the support members 20A1 and 20A2 in FIG. 4 is shown in FIG.

The support members 20A1 and 20A2 do not necessarily have to have a columnar shape as shown in FIG. 4, and may have a rectangular shape or a U-shape as shown in FIG. For example, when the support members 20A1 and 20A2 are U-shaped, the vertical closing door 13 is in the out-of-plane direction (X direction in FIG. 6), the opening / closing direction (Y direction in FIG. 6), and the vertical direction (Z in FIG. 6). Direction) All movements can be suppressed.

When controlling the operation of the support members 20A1 and 20A2 by using the electromagnetic forces 26A and 26B as described above, the electromagnetic force is set so that the current flows at normal times based on the concept of fail-safe. The support members 20A1 and 20A2 are housed inside the upper taper block 10 by the forces 26A and 26B, the switch is turned off in the event of an earthquake, and the support members 20A1 and 20A2 are projected by using the restoring force of the springs 23A and 23B. May be good.

According to this embodiment, since the inertial force in the opening / closing direction of the closing door 13 at the time of an earthquake can be shared by the plurality of support members 20A1 and 20A2, the load on the chain 16 can be reduced. Further, since the support members 20A1 and 20A2 have a support function in the opening / closing direction provided to the out-of-plane support member of the closing door 13 which has been conventionally provided, a support member in the opening / closing direction is newly added. There is no need to do this, which leads to simplification of the structure and cost reduction.

FIG. 7 shows details of the upper bush roller 7 and the upper taper block 10 in the normal state (during opening / closing operation) in the third embodiment of the blowout device of the present invention.

In the third embodiment of the blowout device of the present invention, the operation of the support member of the opening / closing door 13 is controlled by utilizing the inertial force in the opening / closing direction due to the earthquake.

As shown in FIG. 7, in the present embodiment, the support members 20B1 and 20B2 having the stoppers 21B1 and 21B2 protruding in the radial direction are provided inside the upper taper block 10, and the stoppers 21B1 and 21B2, respectively. the one end of the first spring 27B1 and 27B2 are connected placed in natural length _{L B,} the other end of the first spring 27B1 and 27B2 are connected to the bottom of the upper taper block 10.

Further, each of the support members 20B1 and 20B2 is provided with wheel portions 28A and 28B on the side opposite to the side protruding to the outside (upper side in FIG. 7), respectively. The wheels 28A and 28B are in contact with the parabolic extrusion members 29A1 and 29A2 fixed to the upper taper block 10 at the most stable apex positions during normal operation (during opening / closing operation). Each of the parabolic extruded members 29A1 and 29A2 is connected to one end of the second springs 27A1 and 27A2, respectively, and the other end of the second springs 27A1 and 27A2 is attached to a cover 32 installed above the upper taper block 10. Each is connected.

Further, the parabolic-shaped extrusion member 29A1 and the extrusion member 29A2 are separated and not connected at the upper portion of the upper taper block 10.

FIG. 8 shows the operation of the upper bush roller 7 and the upper taper block 10 during an earthquake from the state of FIG. 7.

As shown in FIG. 8, during an earthquake, the parabolic members 29A1 and 29A2 move in the opening / closing direction (to the right in FIG. 8) due to inertial force, so that the wheels 28A and 28B are parabolic members 29A1 and 29A2. Moving along the parabolic shape of 29A2, the support members 20B1 and 20B2 are pushed out from the bottom of the upper tapered block 10 (downward in FIG. 8: out-of-plane direction). The extruded portions of the support members 20B1 and 20B2 extruded from the bottom of the upper taper block 10 to the outside (out-of-plane direction) suppress the movement of the closing door 13 in the opening / closing direction. At this time, the second spring 27A1 is pulled, and the second spring 27A2 is in a compressed state.

When the shaking of the earthquake subsides, the support members 20B1 and 20B2 return to their original state due to the restoring force of the second springs 27A1 and 27A2 and the first springs 27B1 and 27B2. It fits inside the door 13 and the closing door 13 can be opened and closed again.

According to this embodiment, the same effect as that of the first embodiment can be obtained, and the structure can be simplified because the earthquake detection mechanism 24 and the coil 22 of the first embodiment are not required, and the electronic devices can be simplified. It is possible to prevent loss of function due to malfunction.

Next, FIG. 9 shows an example of another shape of the extruded member, and FIG. 10 shows an example of another shape of the extruded member different from that of FIG.

As in the example of another shape of the extruding member shown in FIG. 9, the extruding members 29B1 and 29B2 are connected (integrated) instead of being separated as in the case 1 extruded members 29A1 and 29A2. It may be configured.

Further, as in the example of another shape of the extruded member shown in FIG. 10, which is different from that of FIG. 9, the tip shapes of the support members 20C1 and 20C2 in the opening / closing direction are changed from the wheels, such as the support member tips 30A and 30B. It may have a conical shape. In this case, the shape of the extrusion member 29C may be changed corresponding to the support member tips 30A and 30B whose tips are conical.

11, FIG. 12, FIG. 13, FIG. 14, and FIG. 15 show Example 3 of the blowout device of the present invention.

11 is a plan view of the support structure in the opening / closing direction in the normal opening / closing direction in the third embodiment of the blowout device of the present invention, FIG. 12 is a front view of FIG. 11, and FIG. 13 is a side view of FIG.

In the third embodiment of the blowout device of the present invention shown in the figure, the operation of the support member of the opening / closing door 13 is performed by utilizing the inertial force in the out-of-plane direction (X direction in FIGS. 11, 12, and 13) due to an earthquake. Is to control.

As shown in FIGS. 11, 12, and 13, the blowout device of this embodiment is provided with a support member storage portion 31 at the lower part of the upper taper block 10, and is supported in the vertical direction from the support member storage portion 31. The member 20 pops out.

It is a cross section along the line BB in FIG. 12, and the opening / closing operation in a normal state is shown in FIG.

As shown in FIG. 14, a support member 20D having a wheel portion 28 at the tip thereof is installed inside the support member storage portion 31, and the wheel portion 28 has a parabolic shape in a normal state (during opening / closing operation). The extruded member 29A is in contact with the extruded member 29A at the position of the most stable apex, and the extruded member 29A is connected to and stored in the spring 27A.

FIG. 15 shows the opening / closing operation of the support structure in the opening / closing direction in FIG. 14 during an earthquake.

As shown in FIG. 15, in the event of an earthquake, the parabolic pushing member 29A moves in the out-of-plane direction of the closing door 13 due to the inertial force due to the seismic motion in the out-of-plane direction (X direction in FIG. 15), so that the wheel portion 28 Moves along the parabolic shape of the extrusion member 29A, and the support member 20D is extruded to the outside of the upper tapered block 10 (upward in FIG. 5). The support member 20D extruded to the outside of the upper taper block 10 suppresses the movement of the closing door 13 in the opening / closing direction (Y direction in FIG. 15).

When the shaking of the earthquake subsides, the restoring force of the spring 27A and the weight of the support member 20D return the support member 20D to its original position, so that the support member 20D fits inside the upper taper block 10 and the closing door 13 can be opened and closed again.

According to this embodiment, not only the same effect as that of the first embodiment can be obtained, but also the restoring force due to the weight of the support member 20D is used, so that the number of springs 27A used can be reduced and the structure is simplified. By doing so, reliability can be improved.

The present invention is not limited to the above-described examples, and includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the configurations described. Further, it is possible to replace a part of the configuration of a certain embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of a certain embodiment. Further, it is possible to add / delete / replace a part of the configuration of each embodiment with another configuration.

1 ... Building outdoor wall, 2 ... Closing panel (blowout panel), 3 ... Fall prevention chain, 4 ... Frame, 5 ... Upper rail, 6 ... Lower rail, 7 ... Upper push roller, 8 ... Lower push roller, 9 ... Side Part push roller, 10 ... upper taper block, 11 ... lower taper block, 12 ... side taper block, 13 ... closing door, 14 ... hanger roller, 15 ... drive device, 16 ... chain, 17 ... chain guide, 18 ... bar , 19 ... Spring, 20, 20A1, 20A2, 20B1, 20B2, 20C1, 20C2, 20D ... Support member, 20A3, 20A4 ... Opening, 21A1, 21A2, 21B1, 21B2 ... Stopper, 22A, 22B ... Coil, 23A, 23B ... spring, 24 ... earthquake detection mechanism, 25 ... current, 26A, 26B ... electromagnetic force, 27A, 27A1, 27A2 ... second spring, 27B1, 27B2 ... first spring, 28, 28A, 28B ... wheel part, 29A, 29A1,29A2,29B1,29B2,20C ... pushing member, 30A, 30B ... support member tip, 31 ... support member receiving portion, 32 ... cover, natural length of L a _... spring a, the L B _... spring B natural length, L a _'... length of the spring a at the time of the earthquake.

Claims (11)

A closing panel that opens at the opening of the reactor building when the internal pressure of the reactor building exceeds a predetermined value, guide rails provided above and below the closing panel, and the closing panel so as to cover the closing panel. A closing door slidably installed along the guide rail, a support member that suppresses the movement of the closing door in the opening / closing direction based on shaking during an earthquake, and the support member in the out-of-plane direction of the closing door. A blowout device characterized by having a drive means for driving the door. The blowout device according to claim 1.
The driving means for driving the support member in the out-of-plane direction of the closing door includes an earthquake detection mechanism for detecting shaking during an earthquake, and the support member is mounted on the surface of the closing door based on information from the earthquake detection mechanism. A blowout device characterized by being driven outward. The blowout device according to claim 2.
The support member is installed inside the upper taper block provided on the upper part of the closing door, and a coil connected to the earthquake detection mechanism is arranged around the support member and the support. An opening is formed in the member on the side opposite to the out-of-plane direction, and a spring is housed in the opening.
At the time of an earthquake, the earthquake detection mechanism detects shaking, the switch of the earthquake detection mechanism is turned on, a current flows through the coil, and the spring is stretched by the electromagnetic force generated by the current flowing through the coil. The support member protrudes from the bottom of the upper taper block to the outside, and the protruding portion of the upper taper block suppresses the movement of the upper push roller that meshes with the upper taper block in the opening / closing direction of the closing door. A blowout device characterized by supporting the inertial force of. The blowout device according to claim 3.
A blowout device housed in the opening, the spring having one end connected to the support member and the other end connected to the upper tapered block. The blowout device according to claim 3 or 4.
A blowout device characterized in that the support member is formed in a columnar shape, a rectangular shape, or a U shape, and the coil is arranged around the support member. The blowout device according to claim 5.
A blowout device characterized in that the support member is provided with a stopper protruding in the radial direction, and the stopper limits the amount of protrusion from the bottom of the upper taper block to the outside. The blowout device according to claim 1.
The support member is installed inside an upper taper block provided on the upper part of the closing door.
The driving means for driving the support member in the out-of-plane direction of the closing door is
A first spring having one end connected to a stopper protruding in the radial direction of the support member and the other end connected to the bottom of the upper tapered block.
A wheel portion installed on the side opposite to the out-of-plane direction of the support member, and
A parabolic extruded member fixed to the upper tapered block and normally in contact with the wheel at the most stable apex position.
A blowout device comprising a second spring having one end connected to the extrusion member and the other end connected to a cover installed above the upper tapered block. The blowout device according to claim 7.
In the event of an earthquake, the parabolic-shaped extruding member moves in the opening / closing direction due to inertial force, so that the wheel portion moves along the parabolic shape of the parabolic-shaped extruding member, and the support member of the upper tapered block. The feature is that the movement of the closing door in the opening / closing direction is suppressed by the extruded portion of the support member extruded from the bottom portion in the out-of-plane direction and extruded from the bottom portion of the upper taper block in the out-of-plane direction. Blowout device. The blowout device according to claim 7 or 8.
A blowout device in which a plurality of parabolic-shaped extruded members are installed, and adjacent extruded members are separated or connected to each other. The blowout device according to claim 1.
The driving means for driving the support member in the out-of-plane direction of the closing door is
A blowout comprising a support member accommodating portion installed below the upper taper block provided above the closing door, and having a configuration in which the support member protrudes in the vertical direction from the support member accommodating portion. apparatus. The blowout device according to claim 10.
Inside the support member accommodating portion, the support member having a wheel portion at the tip is installed and is fixed to the upper tapered block, and normally contacts the wheel portion at the most stable apex position. A parabolic extruded member is provided, and the extruded member is connected to a spring and housed inside the support member accommodating portion.
In the event of an earthquake, the inertial force due to the seismic motion in the out-of-plane direction causes the extruded member in the shape of a product to move in the out-of-plane direction of the closing door, so that the wheel portion moves along the shape of the product in the extruded member. The blowout device is characterized in that the support member is pushed out of the upper tapered block, and the support member pushed out of the upper tapered block suppresses the movement of the closing door in the opening / closing direction. ..

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