JP7208110B2 - blowout device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blowout device, and more particularly to a blowout device installed to prevent the reactor building from exploding by releasing the internal pressure of the reactor building when it rises.

In the Tohoku-Chihou-Taiheiyou-Oki Earthquake that occurred on March 11, 2011, a severe accident occurred at the Fukushima Daiichi Nuclear Power Station, where internal pressure in the reactor building increased and part of the reactor building exploded due to the loss of power to the plant. Occurred. Along with this, the Nuclear Regulation Authority (NRA) is demanding stronger measures against severe accidents at nuclear power plants.

One example of such countermeasures is a blowout device installed in the reactor building. In order to prevent the reactor building from exploding when the internal pressure of the reactor building increases, this blowout device opens the opening of the reactor building, and when the internal pressure of the reactor building decreases, the reactor building explodes. It closes the opening.

In relation to this blowout device attached to the reactor building, Patent Literature 1 describes a blowout device that can quickly restore the closed state when the opening of the reactor building is opened.

In this patent document 1, a closing panel attached by a hinge to an opening frame of a reactor building, a fixing device that is broken when the internal pressure of the reactor building exceeds a predetermined value, and a closing panel attached to the closing panel A blowout device comprising a wire attached to one end, a pressure gauge for measuring the internal pressure of the reactor building, and a panel recovery device for winding the other end of the wire in response to the pressure measured by the pressure gauge. Have been described.

JP 2009-121917 A

By the way, the blowout device installed in the reactor building can be divided into two types: the blowout panel attached to the opening of the reactor building and having opening and closing functions; the blowout panel having the opening function and the blowout panel having the closing function Two devices of the out panel closure may be used.

The blowout device of Patent Literature 1 described above can quickly restore the closed state after the opening operation by the blowout panel having the former 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 due to a severe accident, the function cannot be maintained.

In addition, since blow-out panels are often installed on high-altitude floors of nuclear power plants, the blow-out panels already installed in existing plants need to be modified to have the above-mentioned closing function. It becomes complicated to apply. Another problem is that on floors at high elevations, there is not much space to install equipment inside.

On the other hand, in the case of a blowout system that uses two pieces of equipment, a blowout panel and a blowout panel closing device, even if the blowout panel is damaged in a severe accident, the blowout panel closing device will close the opening of the reactor building. and can contain radiation.

In this way, by constructing a blowout device in which the opening function and the closing function are separated into two pieces of equipment, the reliability can be improved from the viewpoint of maintaining the function. It can be easily applied to existing plants because it can be installed outside the plant.

From the above point of view, in the current blowout system, it is common to use two pieces of equipment, a blowout panel and a blowout panel closing device, to perform the functions of opening and closing the reactor building.

The blowout panel closing device generally has a structure in which a sliding suspended door (closing door) is electrically operated to close the opening of the reactor building. have a function.

Since the chain is loaded by the inertial force in the opening and closing direction of the door, it is vulnerable to seismic motion in the opening and closing direction, and there is a risk that the chain will break. Therefore, it is necessary to improve the structural reliability of the blowout panel closing device by reducing the load on the chain.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and its object is to provide a blowout device capable of reducing the load on the chain due to the inertial force in the opening and closing direction of the closing door during an earthquake. be.

In order to achieve the above object, the blowout apparatus of the present invention comprises a closing panel at the opening of the reactor building, which is opened when the internal pressure of the reactor building reaches a predetermined value or more, and upper and lower parts of the closing panel. a guide rail provided in the above, a closing door slidably installed along the guide rail so as to cover the closing panel, and the opening and closing direction of the closing door when shaking due to an earthquake occurs A supporting member for suppressing movement and a driving means for driving the supporting member in the out-of-plane direction of the closing door are provided, and the driving means for driving the supporting member in the out-of-plane direction of the closing door can Including an earthquake detection mechanism for detecting shaking, driving the support member in the out-of-plane direction of the closing door based on information from the earthquake detection mechanism, and inside an upper taper block provided on the upper part of the closing door The support member is installed in the support member, a coil connected to the earthquake detection mechanism is arranged around the support member, and the support member has an opening on the side opposite to the out-of-plane direction is formed, and a spring is housed in this opening. In the event of an earthquake, the earthquake detection mechanism senses shaking, the switch of the earthquake detection mechanism is turned on, and current flows through the coil, and this current flows into the coil. The spring is extended by the electromagnetic force generated by the flow through the coil, and the support member protrudes from the bottom of the upper taper block to the outside. The inertial force of the closing door in the opening/closing direction is supported by suppressing the movement in the opening/closing direction .

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.

FIG. 1 is a diagram showing a closed door in an open state in the overall configuration of the blowout apparatus according to the first embodiment of the present invention installed in a reactor building. 1 is a diagram showing a closed door in the overall configuration of the blowout apparatus according to the first embodiment of the present invention installed in a reactor building; FIG. FIG. 3 is an enlarged view of part A in FIG. 2 ; FIG. 4 is a cross-sectional view taken along line AA in FIG. 3, showing normal opening and closing operations; FIG. 4 is a cross-sectional view taken along line AA in FIG. 3, showing opening and closing operations during an earthquake. It is an example of another shape of the support member in Example 1 of the blow-out device of the present invention, and is a view corresponding to FIG. 3 . FIG. 5 shows a second embodiment of the blowout device of the present invention, and shows opening and closing operations during normal operation corresponding to FIG. 4 ; 6 is a diagram showing the opening and closing operation during an earthquake corresponding to FIG. 5, which is the second embodiment of the blowout device of the present invention. FIG. FIG. 8 is a diagram corresponding to FIG. 7, showing another example of the shape of the pushing member in Embodiment 2 of the blowout device of the present invention. FIG. 9 is an example of a shape different from that in FIG. 9 of the pushing member in Embodiment 2 of the blowout device of the present invention, and is a view corresponding to FIG. 7 . FIG. 11 is a plan view showing a support structure in a normal opening/closing direction in Example 3 of the blowout device of the present invention; It is a front view showing the support structure of the opening-and-closing direction at the time of normal in Example 3 of the blow-out device of the present invention. It is a side view which shows the support structure of the opening-and-closing direction at the time of normal in Example 3 of the blow-out apparatus of this invention. FIG. 13 is a cross-sectional view taken along the line BB of FIG. 12, showing the opening/closing operation during normal operation; FIG. 13 is a cross-sectional view taken along line BB of FIG. 12, showing opening and closing operations during an earthquake.

The blowout device of the present invention will be described below based on the illustrated embodiments. In addition, in each embodiment described below, the same symbols are used for the same components.

FIG. 1 shows Embodiment 1 of the blowout apparatus of the present invention, and is a diagram showing the closed door in the open state in the overall configuration installed in the reactor building. FIG. 2 shows the closed door in the closed state. FIG. 4 is a diagram showing;

The blowout device of this embodiment shown in the figure comprises a closing panel (blowout panel) 2 installed on the exterior wall 1 of the building, and a fall prevention chain 3 for supporting it. 5, with a lower rail 6; Three hanger rollers 14 are provided on the upper rail 5, and the closing door 13 is suspended by the three hanger rollers 14 to support its own weight.

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. A driving device 15 such as a motor installed at the center of the upper rail 5 pulls a chain 16 to slide the closing door 13 in the opening/closing direction (the Y direction in FIG. 1).

As shown in FIG. 2, when the closing door 13 is closed, the upper taper block 10, the lower taper block 11, and the side taper block 12 provided on the upper, lower, and side surfaces of the closing door 13, respectively. , the upper rail 5, the lower rail 6, and the upper push roller 7, the lower push roller 8, and the side push roller 9 installed on the frame 4, respectively. ) is suppressed.

In addition, regardless of whether the closing door 13 is open or closed, the frame 4 is provided with a bar 18 and the closing door 13 is provided with a bar bearing 19 as a support structure for the opening and closing direction of the closing door 13. These are combined to close the closing door 13 in the opening and closing direction. It supports the inertial force of the door 13 due to an earthquake.

FIG. 3 shows an enlarged view of the upper push roller 7 and the upper taper block 10 in FIG. 2 (part A in FIG. 2).

The upper taper block 10 shown in FIG. 3 has a trapezoidal shape as shown in FIG. Climb from the legs to the upper base (from the bottom to the top in FIG. 4) and hold the closing door 13 in the out-of-plane direction (X direction in FIG. 3).

FIG. 4 shows a cross section along line AA in FIG.

FIG. 4 shows a detailed cross section of the upper push roller 7 and the upper taper block 10 in normal opening and closing operations. Coils 22A and 22B are circumferentially disposed around support members 20A and 20A2, respectively. The support members 20A1 and 20A2 are provided with radially projecting stoppers 21A1 and 21A2, respectively, which limit the extent to which the support members 20A1 and 20A2 protrude to the outside.

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

In addition, the coils 22A and 22B arranged on the circumference 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 push roller 7 and the upper taper block 10 during an earthquake from the normal state shown in FIG.

As shown in FIG. 5, in the event of an earthquake, the earthquake detection mechanism 24 senses shaking, the switch is turned on, and current 25 flows through the coils 22A and 22B. A current 25 flowing through coils 22A and 22B produces electromagnetic forces 26A and 26B which cause springs 23A and 23B to extend and support members 20A1 and 20A2 to extend from the bottom of upper taper block 10 to the outside (FIG. 5). downward), and the projecting portion of the upper taper block 10 suppresses the movement of the upper push roller 7 in the opening/closing direction (horizontal direction in FIG. 5), thereby supporting the inertial force of the closing door 13 in the opening/closing direction. It's how it works.

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 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 of the springs 23A and 23B that have been stretched by the electromagnetic forces 26A and 26B, and the closing door 13 can be opened and closed again.

Here, FIG. 6 shows an example of another shape of the support members 20A1 and 20A2 in FIG.

The supporting members 20A1 and 20A2 do not necessarily have a cylindrical shape as shown in FIG. 3 , and may be rectangular or U-shaped as shown in FIG. For example, if the support members 20A1 and 20A2 are U-shaped, the out-of-plane direction (the X direction in FIG. 6), the opening/closing direction (the Y direction in FIG. 6), and the vertical direction (the Z direction in FIG. 6) of the closing door 13 in the vertical direction direction) can suppress all movement.

When the electromagnetic forces 26A and 26B are used to control the operation of the support members 20A1 and 20A2 as described above, the electromagnetic The supporting 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 restoring forces of the springs 23A and 23B are used to protrude the supporting members 20A1 and 20A2. good too.

According to this embodiment, the inertial force in the opening/closing direction of the closing door 13 during an earthquake can be shared by the plurality of support members 20A1 and 20A2, so the load on the chain 16 can be reduced. In addition, since the support members 20A1 and 20A2 are conventionally provided out-of-plane direction support members for the closing door 13 and have a support function in the opening/closing direction, support members in the opening/closing direction are newly added. This leads to simplification of the structure and cost reduction.

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

Embodiment 2 of the blowout device of the present invention controls the operation of the supporting member of the opening/closing door 13 by utilizing the inertial force in the opening/closing direction caused by an earthquake.

As shown in FIG. 7, in this embodiment, the upper taper block 10 has support members 20B1 and 20B2 provided with radially projecting stoppers 21B1 and 21B2, respectively. , one end of the first springs 27B1 and 27B2 installed with a natural length L _B is connected to, and the other end of the first springs 27B1 and 27B2 is connected to the bottom of the upper taper block 10 .

In addition, wheel portions 28A and 28B are respectively installed on the sides of the support members 20B1 and 20B2 opposite to the sides protruding to the outside (upper side in FIG. 7). The wheels 28A and 28B are in contact with the parabolic push-out members 29A1 and 29A2 fixed to the upper taper block 10 at the most stable vertex positions during normal operation (during opening/closing operation). Each of the parabolic pushing 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 connected to the cover 32 installed above the upper taper block 10. connected to each other.

In addition, the parabolic 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 push roller 7 and the upper taper block 10 during an earthquake from the state of FIG.

As shown in FIG. 8, when an earthquake occurs, the parabolic pushing members 29A1 and 29A2 move in the opening/closing direction (rightward direction in FIG. 8) due to inertial force, so that the wheel portions 28A and 28B move the parabolic pushing members 29A1 and 29A2. The supporting members 20B1 and 20B2 move along the parabolic shape of 29A2 and are pushed out from the bottom of the upper taper block 10 to the outside (downward in FIG. 8: out-of-plane direction). The pushed-out portions of the support members 20B1 and 20B2 pushed out from the bottom of the upper taper block 10 (in the 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 in a tensioned state and the second spring 27A2 is in a compressed state.

When the shaking of the earthquake subsides, the restoring force of the second springs 27A1 and 27A2 and the first springs 27B1 and 27B2 restores the support members 20B1 and 20B2 to their original states, so that the support members 20B1 and 20B2 return to the upper taper block 10. , and the closing door 13 can be opened and closed again.

According to this embodiment, the same effects as those of the first embodiment can be obtained, and the structure can be simplified because the seismic detection mechanism 24 and the coil 22 of the first embodiment are not required. Loss of function due to malfunction can be prevented.

Next, FIG. 9 shows an example of another shape of the push-out member, and FIG. 10 shows an example of another shape of the push-out member different from that in FIG.

As in the example of another shape of the extrusion member shown in FIG. 9, the extrusion members 29B1 and 29B2 are connected (integrated) instead of being separated like the parabolic extrusion members 29A1 and 29A2 of the first embodiment. may be configured.

Further, as in the example of the pushing member shown in FIG. 10 having a shape different from that shown in FIG. Alternatively, it may be conical. In this case, the shape of the pushing member 29C may be changed so as to correspond to the tip end portions 30A and 30B of the supporting members having conical tips.

11, 12, 13, 14 and 15 show a third embodiment of the blowout device of the present invention.

11 is a plan view of the support structure in the opening/closing direction during normal operation in Embodiment 3 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.

The embodiment 3 of the blowout device of the present invention shown in the figure utilizes the inertial force in the out-of-plane direction (the X direction in FIGS. 11, 12 and 13) due to an earthquake to operate the support member of the opening/closing door 13. is to control

As shown in FIGS. 11, 12 and 13, the blowout device of this embodiment is provided with a support member housing portion 31 in the lower portion of the upper taper block 10. The support member housing portion 31 supports vertically. A mechanism is provided in which the member 20 protrudes.

FIG. 14 shows a cross section taken along the line BB in FIG. 12, showing the opening/closing operation during normal operation.

As shown in FIG. 14, a support member 20D having a wheel portion 28 at its tip is installed inside the support member housing portion 31, and the wheel portion 28 normally has a parabolic shape (during opening/closing operation). contact with the pushing member 29A at the most stable vertex position, and the pushing member 29A is connected to the spring 27A and stored.

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 extrusion 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 (the X direction in FIG. 15). moves along the parabolic shape of the pushing member 29A, and the supporting member 20D is pushed out of the upper taper block 10 (upward in FIG. 5). The support member 20D pushed out of the upper taper block 10 suppresses the movement of the closing door 13 in the opening/closing direction (the Y direction in FIG. 15).

When the shaking of the earthquake subsides, the supporting member 20D returns to its original position due to the restoring force of the spring 27A and the weight of the supporting member 20D.

According to this embodiment, the same effects as those of the first embodiment can be obtained, and the restoring force due to the weight of the support member 20D is also used. reliability can be improved.

It should be noted that the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail to facilitate understanding of the present invention, and are not necessarily limited to those having all the described configurations. Also, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Moreover, it is possible to add, delete, or replace a part of the configuration of each embodiment with another configuration.

DESCRIPTION OF SYMBOLS 1... Building exterior wall, 2... Closing panel (blowout panel), 3... Drop prevention chain, 4... Frame, 5... Upper rail, 6... Lower rail, 7... Upper push roller, 8... Lower push roller, 9... Side surface Part push roller 10 Upper taper block 11 Lower taper block 12 Side taper block 13 Closed door 14 Hanger roller 15 Drive device 16 Chain 17 Chain guide 18 Bar , 19... bar bearings, 20, 20A1, 20A2, 20B1, 20B2, 20C1, 20C2, 20D... support members, 20A3, 20A4... openings, 21A1, 21A2, 21B1, 21B2... stoppers, 22A, 22B... coils, 23A, 23B... spring, 24... earthquake detection mechanism, 25... electric 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... Extruding member 30A, 30B... Supporting member tip end 31... Supporting member housing portion 32... Cover L _A ... Natural length of spring A LB... Spring _B 's length Natural length, L _A '... Length of spring A at the time of earthquake.

Claims (8)

A closing panel that opens when the internal pressure of the reactor building reaches a predetermined value or more at the opening of the reactor building, guide rails provided above and below the closing panel, and covering the closing panel, A closing door slidably installed along the guide rail; a support member that suppresses movement of the closing door in the opening and closing direction when shaking due to an earthquake occurs; and a drive means for driving in an out-of-plane direction,
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 moved to the surface of the closing door based on information from the earthquake detection mechanism. drive outward,
The support member is installed inside the upper taper block provided on the upper part of the closing door, and the coil connected to the earthquake detection mechanism is arranged around the support member, and the support The member has an opening formed on the side opposite to the out-of-plane direction, and a spring is housed in the opening,
In the event of an earthquake, the earthquake detection mechanism senses shaking, the switch of the earthquake detection mechanism is turned on, and current flows through the coil. A support member protrudes from the bottom of the upper taper block to the outside, and suppresses the movement in the opening/closing direction of the upper push roller, which is engaged with the upper taper block at the protruding portion of the upper taper block, thereby controlling the opening/closing direction of the closing door. A blowout device, characterized in that it supports the inertial force of A blowout device according to claim 1,
A blowout device, wherein the spring housed in the opening has one end connected to the support member and the other end connected to the upper taper block. A blowout device according to claim 1 or 2,
A blowout device according to claim 1, wherein said support member is formed in a cylindrical shape, a rectangular shape or a U-shape, and said coil is arranged around said support member. A blowout device according to claim 3,
A blowout device according to claim 1, wherein said support member has a stopper protruding in a radial direction, and said stopper limits the amount of protrusion of said upper taper block from the bottom of said upper taper block to the outside. A closing panel that opens when the internal pressure of the reactor building reaches a predetermined value or more at the opening of the reactor building, guide rails provided above and below the closing panel, and covering the closing panel, A closing door slidably installed along the guide rail; a support member that suppresses movement of the closing door in the opening and closing direction when shaking due to an earthquake occurs; and a drive means for driving in an out-of-plane direction,
The support member is installed inside an upper taper block provided on the upper part of the closing door,
A driving means for driving the support member in an out-of-plane direction of the closing door,
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 taper block;
a wheel portion installed on the side opposite to the out-of-plane direction of the support member;
a parabolic extrusion member fixed to the upper taper block and normally in contact with the wheel portion at the most stable vertex position;
a second spring having one end connected to said pushing member and the other end connected to a cover mounted above said upper taper block. A blowout device according to claim 5,
In the event of an earthquake, the parabolic push-out member moves in the opening/closing direction due to inertial force, so that the wheel portion moves along the parabolic shape of the parabolic push-out member, and the support member moves to the upper taper block. The movement of the closing door in the opening/closing direction is suppressed by the extruded portion of the support member that is pushed out from the bottom in the out-of-plane direction and pushed out from the bottom of the upper taper block in the out-of-plane direction. blowout device. A blowout device according to claim 5 or 6,
A blow-out device, wherein a plurality of said extruding members having a parabolic shape are installed, and said adjacent extruding members are separated or connected. A closing panel that opens when the internal pressure of the reactor building reaches a predetermined value or more at the opening of the reactor building, guide rails provided above and below the closing panel, and covering the closing panel, A closing door slidably installed along the guide rail; a support member that suppresses movement of the closing door in the opening and closing direction when shaking due to an earthquake occurs; A driving means for driving in the in-plane direction,
The drive means for driving the support member in the in-plane direction of the closing door,
It consists of a support member storage part installed at the bottom of the upper taper block provided at the top of the closing door,
The support member having a wheel portion at its tip is installed inside the support member storage portion, is fixed to the upper taper block, and normally contacts the wheel portion at the most stable apex position. a parabolic extruding member, wherein the extruding member is connected to a spring and housed inside the support member housing;
In the event of an earthquake, the parabolic push-out member moves in the out-of- plane direction of the closing door due to the inertial force caused by the out-of-plane seismic motion, so that the wheel portion moves along the parabolic shape of the push-out member. A blowout device, wherein a support member is pushed out of the upper taper block, and the support member pushed out of the upper taper block suppresses movement of the closing door in an opening/closing direction.

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