JP6430055B1 - Airtight maintenance mechanism of shielding door - Google Patents

Abstract

An airtight maintenance mechanism for a shielding door for closing an opening when a blowout panel provided in a building of a nuclear power plant or the like is opened.
A shielding door provided in an open position that does not overlap with a blowout panel closing an opening of a building and capable of sliding to a closed position so as to close the opening after the blowout panel is opened. The upper part of the shielding door is suspended by a front and rear movable arm and supported by the upper rail, and the upper frame part has an upper presser for holding the shielding door in the closed position, and the lower part of the shielding door is the lower rail. A lower frame portion having a lower presser for supporting the shielding door that has come to the closed position and a side presser for holding the side portion of the shielding door and holding the shielding door that has come to the closed position. A side frame, and a sealing material that is attached so as to surround the opening and that seals a gap between the shielding door that has come to a closed position and the opening.
[Selection] Figure 1

Description

  The present invention relates to an airtight maintenance mechanism for a shielding door for closing an opening when a blowout panel provided in a building of a nuclear power plant or the like is opened.

  In a nuclear facility such as a nuclear power plant, an opening is provided in advance in a wall of a reactor building or a turbine building, and the opening is closed with a blowout panel (rupture disc type safety device). Even if water vapor containing radioactive material leaks from the reactor containment vessel, etc., the airtightness is maintained, but if the pressure in the building suddenly increases, a blowout panel is installed to avoid explosion of the entire building. It has a structure that opens and releases pressure.

  The blowout panel is detached by deformation of a member for fixing to the building due to an increase in pressure in the building, and falls to the outside of the building. As described in Patent Document 1, there is also disclosed an invention of a blowout panel opening device that can open a blowout panel from a remote location even in a state where all power is lost, and that can be installed from outside the building.

Japanese Patent No. 6165587

  If there is radioactive material in the building, there is a risk of leakage into the atmosphere by opening the blowout panel. It is thought that the leakage of radioactive material is less than the explosion of the building, but if the blowout panel is left open, the radioactive material will gradually leak into the atmosphere, so if the pressure inside the building drops, it will open. The need to block the part arises.

  Accordingly, an object of the present invention is to provide an airtight maintenance mechanism for a shielding door for closing an opening when a blowout panel provided in a building of a nuclear power plant or the like is opened.

In order to solve the above problems, the airtight maintenance mechanism of the shielding door according to the present invention is provided at an open position that does not overlap with the blowout panel closing the opening of the building, and after the blowout panel is opened A shield door that is slidable to a closed position so as to close the opening, and an upper part of the shield door is suspended by a front and rear movable arm and supported by an upper rail to hold the shield door that has come to the closed position. An upper frame part having an upper presser, a lower frame part supporting the lower part of the shielding door with a lower rail, and holding the lowering part to press the shielding door that has come to the closed position, and a side part of the shielding door. A side frame having a side press for pressing the shielding door that has come to the closed position, and a side frame that is attached so as to surround the opening, and seals the gap between the shielding door and the opening that has come to the closed position And sealing material , The shielding door, the upper rail the upper guide is provided so as to sandwich the lower guide is provided so as to sandwich the lower rail, by the upper and lower pressing and the side presser when further come to the closed position An upper and lower cam and a side cam are provided so as to be pushed by the seal material, and the upper and lower rails are notched so that the upper and lower guides come out when the shielding door suspended by the arm is pressed against the seal material. Is provided.

  In the airtightness maintaining mechanism of the shielding door, the upper frame portion includes a driving mechanism for sliding the shielding door from the open position to the closed position.

  Further, in the airtight maintaining mechanism of the shielding door, the upper and lower cams and the upper and lower pressers are provided intermittently from the left end to the right end of the opening, and approach the opening as it goes to the side frame. It is characterized by being displaced in the front-rear direction.

  Further, in the airtight maintenance mechanism of the shielding door, the upper and lower cams and the side cam have an inclined surface so that a central side is thicker than the side frame portion, and the inclined surface serves as the upper and lower pressing member and the side pressing member. By mounting, the said shielding door is pressed against the said sealing material, It is characterized by the above-mentioned.

  Further, in the airtight maintenance mechanism of the shielding door, the sealing material is hollow inside, and a plurality of irregularities are arranged in parallel on the surface.

  Furthermore, the shielding door which is this invention is provided with the said airtight maintenance mechanism, It is characterized by the above-mentioned.

  ADVANTAGE OF THE INVENTION According to this invention, when a blowout panel provided in the building of a nuclear power plant etc. is opened, an opening part can be plugged up. After the pressure in the building has escaped, it is possible to prevent the radioactive material from gradually leaking into the atmosphere by sealing the opening so as to press the shielding door. Even when the opening is at a high place, a heavy shielding door can be driven from a distance. Since the sealing material is attached not to the rear surface of the shielding door but to surround the opening, maintenance such as cleaning and replacement is easy.

It is a front view which shows the state which the shielding door which is this invention is open. It is a front view which shows the state which closed the shielding door which is this invention. It is a top view in the state where the shielding door which is the present invention was closed. It is a side view in the state where the shielding door which is the present invention was closed. It is the right view which expanded the upper frame part of the shielding door which is this invention. It is the perspective view which expanded the upper frame part of the shielding door which is this invention. It is the perspective view which looked at the upper frame part of the shielding door which is the present invention from the left side. It is a perspective view which shows the drive mechanism of the shielding door which is this invention. It is the front view which expanded the lower frame part of the shielding door which is this invention. It is the perspective view which looked at the lower frame part of the shielding door which is this invention from the left side. It is the top view which expanded the side frame part of the shielding door which is this invention. It is the perspective view which expanded the side frame part of the shielding door which is this invention. It is sectional drawing of the airtight material used for the shielding door which is this invention.

  Embodiments of the present invention will be described below in detail with reference to the drawings. In addition, what has the same function attaches | subjects the same code | symbol, and the repeated description may be abbreviate | omitted.

  First, the shielding door which is this invention is demonstrated. FIG. 1 is a front view showing a state in which the shielding door is open. FIG. 2 is a front view showing a state in which the shielding door is closed. FIG. 3 is a plan view in a state where the shielding door is closed. FIG. 4 is a side view in a state where the shielding door is closed. In FIG. 1, the outside (front side) of the building is the front (front) and the inside is the back (back).

  As shown in FIGS. 1 to 4, the building 100 has an opening 120 penetrating from the indoor to the wall 110 in advance, and a blowout panel (not shown) is used as a fastener so as to close the opening 120. By fixing, when the indoor pressure becomes high, the fastener is deformed or broken to release the fixing, and the blowout panel is dropped outdoors to release the pressure from the opened opening 120. It has a structure. In addition, when the opening part 120 exists in a high place, you may make it receive the blowout panel and fastener which removed.

  The building 100 includes a shielding door 200 for closing the opened opening 120, an upper frame portion 300, a lower frame portion 500 and a side frame portion 600 attached to the wall 110 for holding the shielding door 200, a shielding door. A drive mechanism 400 for opening and closing 200, a sealing material 700 for sealing a gap between the shielding door 200 and the opening 120, and the like are provided.

  The shielding door 200 is a metal plate or the like that is slightly larger than the opening 120, and is installed at a position that does not overlap the opening 120 to which the blowout panel is attached (for example, the left side of the opening 120). The shielding door 200 is moved along the wall 110 by the drive mechanism 400 in a range from an open position (see FIG. 1) that does not completely overlap the opening 120 to a closed position (see FIG. 2) that completely overlaps the opening 120. Can be slid (for example, moved in the left-right direction).

  The upper frame portion 300 and the lower frame portion 500 are supported from above and below so that the shielding door 200 does not come off, and the side frame portion 600 is left and right so that the shielding door 200 does not jump out of the range between the open position and the closed position. Holding the edge.

  The sealing material 700 is attached to the surface of the wall 110 so as to surround the opening 120, and comes into contact with the peripheral edge of the back surface of the shielding door 200 when the shielding door 200 comes to the closed position. If the sealing material 700 is attached to the back surface of the shielding door 200, it is difficult to maintain the sealing material 700 unless the shielding door 200 is removed (particularly in the case of a high place or weight). Then, the maintenance of the sealing material 700 is easy at the open position.

  Next, the upper frame part of the shielding door will be described. FIG. 5 is an enlarged right side view of the upper frame portion of the shielding door. FIG. 6 is an enlarged perspective view of the upper frame portion of the shielding door. FIG. 7 is a perspective view of the upper frame portion of the shielding door as viewed from the left side. FIG. 8 is a perspective view showing a driving mechanism of the shielding door.

  As shown in FIGS. 5 and 6, the upper frame portion 300 includes an upper support frame 310 that supports the shielding door 200, an arm 320 that suspends the shielding door 200, and an upper presser 330 that presses the shielding door 200 against the sealing material 700. And an upper rail 340 that holds the shield door 200 so as not to be displaced in the front-rear direction when the shielding door 200 slides. The drive mechanism 400 may be provided in the upper frame part 300.

  In addition, an upper cam 210 is provided on the upper portion of the shielding door 200 so as to be pressed against the sealing material 700 by the upper presser 330, and an upper guide 220 is provided by the upper rail 340 so as to slide without being displaced in the front-rear direction.

  The upper support frame 310 is fixed to the wall 110 and supports the load of the shielding door 200. The arm 320 suspends the shielding door 200 by connecting the upper support frame 310 and the shielding door 200. By passing the shaft through the upper support frame 310 side and the shielding door 200 side, the shielding door 200 is moved in the front-rear direction (left and right in FIG. 5). The arm 320 hangs down due to the weight of the shielding door 200 in the open position, but in the closed position, the arm 320 is displaced rearward (right in FIG. 5) by being pressed against the sealing material 700. It becomes.

  The upper press 330 is obtained by fixing, for example, a columnar rotating body to the upper support frame 310 in accordance with the position of the upper cam 210 of the shielding door 200 in the closed position. The upper cam 210 is inclined forward (left side in FIG. 5) from the side frame part 600 (front side in FIG. 5) toward the center side (back side in FIG. 5). The center side is thicker than 600. When approaching the closed position, the inclined surface is placed on the upper presser 330 so that the shielding door 200 is moved rearward and pressed against the sealing material 700.

  The upper rail 340 is laid from one end (frontmost in FIG. 5) to the other end (most rear in FIG. 5) of the upper frame 300, and is sandwiched by the upper guide 220 of the shielding door 200. The shielding door 200 is slid from the closed position to the open position without being displaced. The upper guide 220 may be provided with a columnar rotating body so as to contact the front and rear (left and right in FIG. 5) of the upper rail 340.

  As shown in FIG. 7, a plurality of upper cams 210 and upper pressers 330 are provided intermittently, and are arranged shifted in the front-rear direction (left and right in FIG. 7) so as to correspond in the closed position. For example, when the opening 120 is arranged from the left end (front side in FIG. 7) to the right end (back side in FIG. 7), the upper cam 210 on the right end is moved when the sliding movement starts from the open position to the closed position. What is necessary is just to shift to the front-back direction so that it may approach the opening part 120 as it goes to the side frame part 600 so that it may not contact with the upper holding | maintenance 330 of a left end.

  As shown in FIG. 8, the drive mechanism 400 includes gears 410, 410 a, 410 b, a rotating shaft 420 that passes through the gear 410, a motor 430 that rotates the rotating shaft 420, and the like. A driving rail 350 connected to the shielding door 200 is laid, the gear 410a and the gear 410b are disposed on the driving rail 350, and the gear 410 is disposed between and above the gear 410a and the gear 410b. Then, the chain is stretched on the driving rail 350 and hung on the gear 410a, the gear 410, and the gear 410b. When the motor 430 is driven to rotate the gear 410, the chain is wound and the shielding door 200 moves together with the driving rail 350.

  It is preferable that the driving mechanism 400 can be driven remotely. What is necessary is just to control so that it may decelerate and stop with a limit switch etc. Even when the opening 120 is high, the heavy shielding door 200 can be driven from a distance. Moreover, it is preferable that it can be driven even when the power source or the like is lost.

  Next, the lower frame part of the shielding door will be described. FIG. 9 is an enlarged front view of the lower frame portion of the shielding door. FIG. 10 is a perspective view of the lower frame portion of the shielding door as viewed from the left side.

  As shown in FIG. 9, the lower frame portion 500 includes a lower support frame 510 that supports the shielding door 200, a lower presser 520 that presses the shielding door 200 against the sealing material 700, and the front and rear when the shielding door 200 slides. The lower rail 530 etc. which hold | maintain so that it may not shift | deviate to a direction are provided.

  Further, a lower cam 230 is provided at the lower part of the shielding door 200 so as to be pressed against the sealing material 700 by the lower presser 520, and a lower guide 240 is provided by the lower rail 530 so as to slide without being displaced in the front-rear direction.

  The lower support frame 510 is fixed to the wall 110. Since the shielding door 200 is not directly placed on the lower support frame 510, the load of the shielding door 200 is not applied to the lower support frame 510.

  The lower presser 520 is obtained by fixing, for example, a columnar rotating body to the lower support frame 510 in accordance with the position of the lower cam 230 of the shielding door 200 in the closed position. The lower cam 230 is inclined forward from the side frame portion 600 toward the center side, and the center side is thicker than the side frame portion 600. When approaching the closed position, the inclined surface is placed on the lower presser 520, whereby the shielding door 200 is moved rearward and pressed against the sealing material 700.

  The lower rail 530 is laid so as to extend from one end to the other end of the lower frame portion 500, and is sandwiched by the lower guide 240 of the shielding door 200 so that the shielding door 200 is slid without being displaced from the closed position to the open position. Move. The lower guide 240 may be provided with a columnar rotating body so as to contact the front and rear of the lower rail 530.

  A plurality of lower cams 230 and lower pressers 520 are provided intermittently, and are shifted in the front-rear direction so as to correspond to each other in the closed position. For example, when the opening 120 is arranged from the left end to the right end, when the sliding movement is started from the open position to the closed position, the right frame lower cam 230 does not come into contact with the left end lower presser 520. What is necessary is just to shift to the front-back direction so that it may approach the opening part 120 as it goes.

  As shown in FIG. 10, the lower rail 530 is provided with a slit-shaped notch 540 so that the lower guide 240 comes out when the shielding door 200 is pressed against the sealing material 700. The upper rail 340 is similarly provided with a notch 540.

  Since the upper guide 220 is sandwiched between the upper rails 340 and the lower guide 240 is sandwiched between the lower rails 530, the shield door 200 suspended from the arm 320 is restricted from moving in the front-rear direction. By opening the notches 540 in the upper rail 340 and the lower rail 530, the shielding door 200 can be pressed against the sealing material 700 in the closed position.

  Next, the side frame part of the shielding door will be described. FIG. 11 is an enlarged plan view of the side frame of the shielding door. FIG. 12 is an enlarged perspective view of the side frame portion of the shielding door.

  As shown in FIGS. 11 and 12, the side frame portion 600 includes a side support frame 610 that supports the shielding door 200, a side presser 620 that presses the shielding door 200 against the sealing material 700, and the like. Further, a side cam 250 is provided on the side portion of the shielding door 200 so as to be pressed against the sealing material 700 by the side presser 620.

  The side support frame 610 is fixed to the wall 110. The side presser 620 is obtained by fixing the rotating body to the side support frame 610 in accordance with the position of the side cam 250 of the shielding door 200 in the closed position. The side cam 250 is inclined forward from the side frame portion 600 toward the center side, and the center side is thicker than the side frame portion 600. When approaching the closed position, the inclined surface is placed on the side presser 620, whereby the shielding door 200 is moved rearward and pressed against the sealing material 700.

  Next, the airtight material used for the shielding door will be described. FIG. 13 is a cross-sectional view of an airtight material used for the shielding door.

  As shown in FIG. 13A, the sealing material 700 uses a resin or the like to ensure hermeticity, and a plurality of uneven portions 710 arranged on the surface, a hollow portion 720 that secures a space inside, a wall 110, a base 730 in contact with 110, a support 740 that connects the uneven portion 710 and the base 730, a mounting portion 750 that fixes the base 730 to the wall 110, and the like.

  The concavo-convex portion 710 improves airtightness by bringing a plurality of protrusions into contact with the shielding door 200. For example, as shown in FIG. 13B, three long protrusions may be provided and contacted so that they are curved, so that airtightness can be ensured regardless of the contact from the left or right side. . In addition, it is preferable to deform | transform so that the uneven | corrugated | grooved part 710 may curve in the direction of the hollow part 720, and a sealing performance is not impaired when the pushing amount increases.

  For example, as shown in FIG. 13C, air is not injected into the hollow portion 720, but it may be made elastic by filling with sponge-like urethane or the like. Moreover, as shown in FIG.13 (d), a rubber-like hose is incorporated in the hollow part 720, or as shown in FIG.13 (e), the back surface of the uneven | corrugated | grooved part 710 and the base 730 are connected in the hollow part 720. It may be reinforced. Furthermore, as shown in FIG. 13 (f), the support 740 may be made spring-like to have elasticity, or the base 730 may be raised as shown in FIG. 13 (g).

  According to the present invention, the opening 120 can be closed when a blowout panel provided in a building of a nuclear power plant or the like is opened. After the pressure in the building 100 escapes, the opening 120 is sealed so as to press the shielding door 200, so that the radioactive material can be prevented from gradually leaking to the atmosphere. Even when the opening 120 is high, the heavy shielding door 200 can be driven from a distance. Since the sealing material 700 is attached not to the back surface of the shielding door 200 but to surround the opening 120, maintenance such as cleaning and replacement is easy.

  As mentioned above, although the Example of this invention was described, it is not limited to these. For example, a presser may be provided on the shielding door 200 and a cam may be provided on the frame portion. Moreover, a rail may be provided in the shielding door 200 and a guide may be provided in the frame portion.

  In a normal state, the sealing material 700 is in a wild state, and thus a thin sheet or the like may be attached to the sealing material 700 so that dust and dirt are not easily attached. Further, a blower or the like that blows off dust or dust may be provided so as to facilitate cleaning even at high places. Furthermore, the shielding door 200 may be covered with a net or the like.

100: building 110: wall 120: opening 200: shielding door 210: upper cam 220: upper guide 230: lower cam 240: lower guide 250: side cam 300: upper frame portion 310: upper support frame 320: arm 330: upper Presser 340: Upper rail 350: Drive rail 400: Drive mechanism 410: Gear 420: Rotating shaft 430: Motor 500: Lower frame portion 510: Lower support frame 520: Lower presser 530: Lower rail 540: Notch 600: Side frame Part 610: Side support frame 620: Side presser 700: Seal material 710: Concavity and convexity 720: Hollow part 730: Base 740: Support 750: Mounting part

Claims (6)

A shielding door that is provided in an open position that does not overlap with the blowout panel that closes the opening of the building, and is slidable to the closed position so as to close the opening after the blowout panel is opened;
An upper frame part having an upper presser for holding the upper part of the shielding door and supporting the upper door with an upper rail and holding the shielding door which has come to the closed position, while being suspended by an arm movable back and forth,
A lower frame portion supporting a lower part of the shielding door with a lower rail and having a lower presser for pressing the shielding door that has come to a closed position;
A side frame having a side press for pressing the side of the shielding door and holding the shielding door in the closed position;
The sealing door is attached so as to surround the opening, and includes a sealing material for sealing a gap between the shielding door that has come to a closed position and the opening,
The shielding door is provided with an upper guide so as to sandwich the upper rail, and is provided with a lower guide so as to sandwich the lower rail. Upper and lower cams and side cams are provided to be pushed by the sealing material,
The upper and lower rails are provided with cutouts so that the upper and lower guides come out when the shielding door suspended from the arm is pressed against the sealing material.
The airtight maintenance mechanism of the shielding door characterized by this. The upper frame portion includes a drive mechanism for sliding the shielding door from an open position to a closed position.
The airtight maintenance mechanism for a shielding door according to claim 1. A plurality of the upper and lower cams and the upper and lower pressers are provided intermittently from the left end to the right end of the opening, and are shifted in the front-rear direction so as to approach the opening as it goes toward the side frame.
The airtight maintenance mechanism of the shielding door according to claim 1 or 2. The upper and lower cams and the side cam have an inclined surface so that the center side is thicker than the side frame portion, and the inclined door is placed on the upper and lower pressers and the side presser so that the shielding door becomes the sealing material. Pressed against,
The airtight maintenance mechanism for a shielding door according to any one of claims 1 to 3. The sealing material has a hollow interior and a plurality of irregularities arranged in parallel on the surface.
The airtight maintenance mechanism of the shielding door according to any one of claims 1 to 4. The airtight maintenance mechanism according to any one of claims 1 to 5 is provided.
Shield door characterized by that.

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