JP2019086323A - Blowout device - Google Patents

Abstract

To provide a blowout device that can be reused after open-circuit operation without requiring manual work or electric power.SOLUTION: The blowout device comprises a tabular blowout panel 3 for shutting up an opening 100a formed in the building of a nuclear power generation facility, and a guide frame 2 for movably holding the blowout panel 3 in a direction in which it approaches or separates from the opening 100a. When the internal pressure of the building rises to a prescribed value or above, the blowout panel 3 moves in a direction in which it separates from the opening 100a against the deadweight and the opening 100a is opened; when the internal pressure of the building falls, the blowout panel 3 moves to the opening 100a side by the deadweight and the opening 100a is shut.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a blowout apparatus for releasing pressure to the outside when the internal pressure of a building of a nuclear power generation facility rises.

  For example, if the main steam pipe rupture accident occurs outside the reactor containment vessel, the high temperature and high pressure primary coolant is released into the building, the internal pressure of the building rises, and the external pressure acting on the reactor containment vessel rises. There is a risk that the building's own functions may be impaired. At the time of such an accident, a blowout device is installed to release pressure (steam) inside the building to the outside to relieve the rise in internal pressure. As this blowout device, a clip type and a rupture are conventionally used. Disk types are widely used.

  In the clip type blowout apparatus, as shown in FIG. 9A, a blowout panel 102 for closing an opening 101a of an outer wall 101 of a building is temporarily fixed by a clip 103. Then, when the internal pressure of the building rises to a predetermined value or more, as shown in FIG. 9B, the temporary fixing by the clip 103 is released, the blowout panel 102 is detached, and the opening 101a is opened.

  As shown in FIG. 10A, in the blowout apparatus of the rupture disk type, the blowout panel 104 for closing the opening 101a of the outer wall 101 of the building is formed in advance with a scratch (portion with weak pressure resistance) 104a. . Then, when the internal pressure of the building rises to a predetermined value or more, as shown in FIG. 10B, the blowout panel 104 is broken from the damaged portion 104a, and the opening 101a is opened.

  In such a blowout apparatus, it is necessary to close the opening 101a again after the internal pressure of the building decreases (after the opening operation), but once the opening 101a is opened, the blowout panels 102, 104, etc. Not only does it need to be replaced, it takes time and money, but it can also expose workers. For this reason, there is known a blowout apparatus which can be quickly restored to its closing state after the opening operation (see, for example, Patent Document 1).

  The blowout device includes a closing panel attached by a fixing device, a wire attached at one end to the closing panel, and a panel restoration device for winding the other end of the wire at the opening of the building. Then, when the internal pressure of the building reaches a predetermined value or more, the fixing device is broken, and the closing panel is rotated to open the opening, and then the wire is wound by the panel restoration device to reclose the closing panel to the closing position. It can be installed.

JP, 2009-121917, A

  By the way, the inventor of the present application thinks that it may be assumed that it is desirable that the blowout device can be used continuously as the blowout device even after the opening operation once. However, in the blowout device described in Patent Document 1, when the fixing device is broken, the closing panel is rotated to open the opening, and thereafter the wire is wound by the panel restoration device to close the closing panel. It can not be used continuously as a blowout device even if it is re-installed. That is, since the fixing device is broken, in order to reuse it as a blow-out device, it is necessary to reinstall the fixing device, which requires work by a worker.

  In addition, when power is used to drive the panel restoration device, the wire can not be wound up in the event of a power failure. On the other hand, manually driving the panel restoration device requires operation and work by a worker.

  Therefore, an object of the present invention is to provide a blowout device that can be reused after an opening operation without requiring human work or power.

  In order to solve the above problems, the invention according to claim 1 is characterized in that a plate-like blow-out panel closing an opening formed in a building of a nuclear power generation facility, and movably in the direction away from the opening. A guide holder for holding the blowout panel, and pressing means for pressing the blowout panel in the direction for closing the opening, and when the internal pressure of the building rises to a predetermined value or more, the pressure is resisted against the pressure The blowout panel moves in a direction away from the opening to open the opening, and when the internal pressure of the building drops, the press moves the blowout panel to the opening side to close the opening. It is a blowout device characterized by being peeled off.

  According to the present invention, when the internal pressure of the building rises to a predetermined value or more due to an accident or the like, the blowout panel moves in a direction away from the opening against the pressure by the pressing means to open the opening. Gas (vapor) is exhausted from the opening. As a result, when the internal pressure of the building drops, the blowout panel is moved to the opening side by the pressing by the pressing means, and the opening is closed. Then, when the internal pressure of the building rises again to a predetermined value or more, the operation of the blowout panel separating from the opening again and opening the opening is repeated.

  The invention according to claim 2 is the blowout apparatus according to claim 1, wherein the guide holder is provided on an annular guide frame fitted into the opening, and the blowout panel, and the inner peripheral surface of the guide frame And a guided portion for guiding the blowout panel in contact therewith, the blowout panel being in contact with an end face of the guide frame closes the opening and the blowout panel is the guide frame. The opening is opened when the end face is separated.

  The invention of claim 3 is the blowout apparatus according to claim 2, wherein the blowout panel is disposed such that the plate surface extends in the vertical direction, and the pressing means is configured by the weight of the blowout panel. When the internal pressure of the building rises above a predetermined value, the blowout panel moves obliquely upward from the opening, and when the internal pressure of the building drops, the blowout panel opens from an angle from above with its own weight The guide frame and the guided portion are formed so as to move to the side.

  The invention of claim 4 relates to the blowout device according to claim 2, wherein the blowout panel is disposed such that the plate surface extends in the lateral direction, and the pressing means is configured by the weight of the blowout panel. When the internal pressure of the building rises above a predetermined value, the blowout panel moves upward from the opening, and when the internal pressure of the building drops, the blowout panel moves from the top to the opening side by its own weight. The guide frame and the guided portion are formed to move.

  According to the invention of claim 1, even if the blowout panel is separated from the opening and the opening is opened, if the internal pressure of the building is lowered, the blowout panel closes the opening by the pressing means and the internal pressure of the building again When the pressure rises above a predetermined value, the blowout panel opens the opening again. In this manner, the apparatus can be used again as a blowout apparatus after the opening operation without requiring human work or power. Moreover, even if the opening is opened once, the blowout panel automatically closes the opening by the pressing means, so that not only labor and cost can be suppressed, but the blowout device is continuously used immediately (next blowout) It is possible to prepare for out). In addition, even when the opening operation (malfunction) occurs due to an earthquake or an external impact, it can be used immediately as a blowout device.

  According to the second aspect of the present invention, the guide portion is in contact with the guide frame fitted in the opening, and the blowout panel is in contact with and separated from the guide frame. For this reason, it becomes possible to install a blowout device easily and rapidly also to the existing and existing opening.

  According to the invention of claim 3, the blowout panel is disposed so that the plate surface extends in the vertical direction, and when the internal pressure of the building rises above a predetermined value, the blowout panel moves obliquely upward and the opening portion Since it is opened, it is effective when arranging the blow-out panel vertically on the outer wall etc. and exhausting the gas inside the building. In addition, since the pressing means is only configured by the weight of the blowout panel, the configuration can be simplified, and as a result, the reliability and maintainability can be improved.

  According to the invention of claim 4, the blowout panel is disposed so that the plate surface extends in the lateral direction, and when the internal pressure of the building rises above a predetermined value, the blowout panel moves upward and the opening is opened. This is effective when the blowout panel is horizontally disposed on a ceiling or the like to exhaust the gas in the building. In addition, since the pressing means is only configured by the weight of the blowout panel, the configuration can be simplified, and as a result, the reliability and maintainability can be improved.

It is a side view (partly sectional view) showing a schematic structure of a blowout device concerning Embodiment 1 of this invention, (a) shows a state where a blowout panel closed an opening, (b) shows FIG. 10 is a view showing a state in which the blowout panel opens the opening. It is a front view (right side view of Fig.1 (a)) of the blowout apparatus of FIG. It is a rear view (left side view of Fig.1 (a)) of the blowout apparatus of FIG. It is AA sectional drawing of Fig.1 (a). It is a rear view (a) and a side view (b) which show the blowout panel of the blowout apparatus of FIG. 1, a guide pole, and a stopper ring. It is an expanded sectional view which shows the guide frame of the blowout apparatus of FIG. It is a side view (partly sectional view) showing a schematic structure of a blowout device concerning Embodiment 2 of this invention, (a) shows a state where a blowout panel closed an opening, (b) shows FIG. 10 is a view showing a state in which the blowout panel opens the opening. It is a side sectional view showing the schematic structure of the blowout device concerning Embodiment 3 of this invention, (a) shows the state where the blowout panel closed the opening, (b) shows the blowout panel. It is a figure which shows the state which open | released the opening part. It is a side sectional view showing the outline composition of the conventional clip type blowout device, (a) shows a state where a blowout panel is closed, (b) is a figure showing a state where a blowout panel is opened. is there. It is a front view showing a schematic structure of a conventional rupture disk type blowout apparatus, wherein (a) shows a closed state of the blowout panel and (b) shows an open state of the blowout panel. is there.

  Hereinafter, the present invention will be described based on the illustrated embodiments.

Embodiment 1
1 to 6 show this embodiment, and FIG. 1 is a side view (partially sectional view) showing a schematic configuration of the blowout apparatus 1 according to this embodiment, and FIG. The state which the out panel 3 obstruct | occluded the opening part 100a is shown, (b) shows the state which the blowout panel 3 open | released the opening part 100a. The blowout apparatus 1 is an apparatus for releasing the pressure, that is, the gas (vapor) inside the building, to the outside when the internal pressure of the building of the nuclear power generation facility increases, and mainly the guide frame (guide holder) 2 and , A blowout panel 3, a guide pole (guide holder, guided portion) 4, and a stopper ring 5. Here, in this embodiment, the case where the blowout apparatus 1 is installed on the (substantially vertical) outer wall 100 extending in the vertical direction of the building will be described, and the outer wall 100 has a window hole shape (front shape is substantially square) An opening 100a is formed.

  The guide frame 2 is an annular frame fitted in the opening 100a, and constitutes a guide holder together with the guide pole 4, and is blowout movably in a direction (substantially thickness direction of the outer wall 100) coming in contact with the opening 100a. Hold the panel 3 That is, as shown in FIGS. 2 and 3, the outer shape is a square window frame having substantially the same shape as the outer shape of the opening 100a, and is formed to fit along the inner peripheral surface of the opening 100a. ing. Further, the thickness of the guide frame 2 is smaller than the thickness of the outer wall 100, the guide frame 2 is accommodated in the central portion in the thickness direction of the opening 100a, and the blowout panel 3 closes the opening 100a. 1 is adapted to fit within the opening 100a. In this state, the front of the blowout panel 3 (the outer surface of the building) is flush with the outer surface of the outer wall 100, and the back of the stopper ring 5 (the inner surface of the building) is flush with the inner surface of the outer wall 100.

  Then, the guide frame 2 can be fitted into the opening 100 a and can be fixed to the outer wall 100 with a fixing tool such as a screw. The blowout panel 3, the guide pole 4, and the stopper ring 5 are disposed on such a guide frame 2 to be unitized.

  Further, as shown in FIG. 1, the lower surface 2a of the upper side portion of the guide frame 2 and the upper surface 2b of the lower side portion are formed in a tapered surface which is inclined upward from the inside to the outside of the building. Further, as shown in FIG. 6, a rotatable roller 21 is disposed so as to protrude from the lower surface 2a and the upper surface 2b, and the guide pole 4 is disposed at a position where the guide pole 4 at the upper side and lower side of the guide frame 2 contacts. It moves and slides smoothly. Further, as shown in FIG. 4, a guide plate 22 protruding inward is provided in the vicinity of the roller 21 so that the guide pole 4 can be guided without being laterally shifted.

  The blowout panel 3 is a plate-like panel that closes the opening 100a so as to open and close freely, and in this embodiment, the plate surface is disposed so as to extend in the vertical direction. That is, as shown in FIG. 2, the outer shape is a rectangular plate shape smaller (the height is slightly shorter) than the outer shape of the guide frame 2 and is disposed outside the building than the guide frame 2.

  Then, as shown in FIG. 1 (a), the blowout panel 3 abuts on the entire end face 2c on the outer side of the guide frame 2 to close the opening 100a, as shown in FIG. 1 (b) The opening 100 a is opened by the blowout panel 3 being separated from the end face 2 c of the guide frame 2. Further, a packing is provided on the end face 2c of the guide frame 2 so that airtightness is secured when the blowout panel 3 blocks the opening 100a.

  Here, the weight of the blowout panel 3 is set to have a function as pressing means for always pressing the blowout panel 3 in the direction of closing the opening 100a, and the pressing means is configured by the weight of the blowout panel 3 It is done. That is, as described later, when the internal pressure of the building drops after the opening 100a is opened, the blowout panel 3 moves toward the opening 100a by its own weight (pressed by the pressing means) to close the opening 100a. As such, the weight of the blowout panel 3 is set.

  The guide pole 4 is provided on the blowout panel 3 and guides the blowout panel 3 in contact with the inner peripheral surface of the guide frame 2. That is, as shown in FIG. 5, it has a substantially square bar-shaped cross section, one end of which is connected to the four corners of the back surface (the inner surface of the building) of the blowout panel 3 and slopes upward from the inside to the outside of the building It is arranged to do. The inclination angle is set to the same angle as the inclination angle of the lower surface 2a and the upper surface 2b (inner peripheral surface) of the guide frame 2, and the arrangement position of each guide pole 4 is the roller 21 (inner peripheral surface) of the guide frame 2. It is set to touch.

  Then, as shown in FIG. 1, the upper surfaces of the upper two guide poles 4 are in contact with the upper two rollers 21 of the guide frame 2, and the lower surfaces of the lower two guide poles 4 are the guide frame 2. Four guide poles 4 are disposed in the guide frame 2 so as to contact the lower two rollers 21 respectively. Further, in this state, as shown in FIG. 5, the outer sides of the upper two guide poles 4 are sandwiched by the upper two guide plates 22 of the guide frame 2, and the outer sides of the lower two guide poles 4 are The two guide plates 22 under the guide frame 2 are interposed.

  As a result, the four guide poles 4 and the blowout panel 3 are guided by the lower surface 2a and the upper surface 2b of the guide frame 2, and move obliquely upward or obliquely downward. At this time, the blowout panel 3 moves in parallel while extending in the vertical direction. A guide holder is configured by such a guide pole 4 and the guide frame 2.

  The stopper ring 5 restricts the movement of the blowout panel 3, and as shown in FIG. 5, has a square window frame shape, and the other end of the guide pole 4 is connected to the four corners. Then, with the blowout panel 3 opening the opening 100a, as shown in FIG. 1 (b), the stopper ring 5 abuts on the inner end face 2d of the guide frame 2, and the blowout panel 3 further increases. It is designed to prevent it from moving.

  Then, as shown in FIG. 1 (a), when the internal pressure of the building rises above a predetermined value in a state where the blowout panel 3 is closed and the opening 100a is closed, as shown in FIG. 1 (b) The blowout panel 3 moves in a direction away from the opening 100a against the weight of the out panel 3 to open the opening 100a. At this time, the blowout panel 3 is moved obliquely upward from the opening 100 a by being guided by the lower surface 2 a and the upper surface 2 b of the guide frame 2 and the guide pole 4. Thereafter, when the internal pressure of the building drops, the blowout panel 3 moves to the opening 100a side by its own weight, and as shown in FIG. 1A, the opening 100a is closed again. At this time, the blowout panel 3 is moved to the opening 100a from diagonally above by being guided by the lower surface 2a and the upper surface 2b of the guide frame 2 and the guide pole 4. That is, the shapes of the lower surface 2 a and the upper surface 2 b of the guide frame 2, the angle, the arrangement angle of the guide pole 4, the weight of the blowout panel 3, the stopper ring 5 and the like are set to perform such operation. There is.

  According to the blow-out apparatus 1 having such a configuration, as shown in FIG. 1A in normal times, the blow-out panel 3 blocks the opening 100a and the gas in the building is not released to the outside. Then, when the internal pressure of the building rises to a predetermined value or more due to an accident or the like, as shown in FIG. 1 (b), the blowout panel 3 separates from the opening 100a, the opening 100a is opened, and the gas in the building is opened. The air is exhausted to the outside through the portion 100 a, the inside of the stopper ring 5 and the inside of the guide frame 2. As a result, when the internal pressure of the building drops, the blowout panel 3 moves to the opening 100a side by its own weight, and the opening 100a is closed again. Thereafter, when the internal pressure of the building rises again to a predetermined value or more, the blowout panel 3 is separated again to repeat the operation of opening the opening 100a.

  As described above, according to the blowout apparatus 1, even if the blowout panel 2 is separated from the opening 100a and the opening 100a is opened, if the internal pressure of the building is lowered, the blowout panel is pressed by its own weight (pressing means) When 3 closes the opening 100a and the internal pressure of the building rises again to a predetermined value or more, the blowout panel 3 opens the opening 100a again. In this way, it can be used again (as many times as a blowout device) after an opening operation without requiring human work or power. Moreover, even if the opening 100a is opened once, the blowout panel 3 automatically closes the opening 100a by its own weight, so that not only labor and cost can be suppressed, but it can be continuously used as a blowout device (next To prepare for the blowout of the

  Further, the blowout panel 3 is disposed so that the plate surface extends in the vertical direction, and when the internal pressure of the building rises to a predetermined value or more, the blowout panel 3 moves obliquely upward and the opening 100a is opened. This is effective when the blowout panel 3 is disposed vertically on an outer wall or the like to exhaust the gas in the building. Moreover, since the pressing means is only configured by the weight of the blowout panel 3, the configuration can be simplified, and as a result, the reliability and maintainability can be improved.

  On the other hand, since the guide pole 4 is in contact with the guide frame 2 fitted in the opening 100a and the blowout panel 3 is in contact with and separated, there is no need to process or improve the opening 100a itself. For this reason, it becomes possible to install the blowout device 1 easily and quickly even in the existing and existing openings 100a.

Second Embodiment
FIG. 7 is a side view (partially sectional view) showing a schematic configuration of the blowout apparatus 1 according to this embodiment, and (a) shows a state in which the blowout panel 3 blocks the opening 100a, (B) is a figure which shows the state which the blowout panel 3 open | released the opening part 100a. In this embodiment, the configuration is different from that of the first embodiment in that the plate surface of the blowout panel 3 extends in the horizontal direction (lateral direction), and the same reference numerals are given to the same configuration as the first embodiment. I omit that explanation. Here, the case where the blowout apparatus 1 is installed on a horizontal ceiling (top plate) 110 of a building will be described, and the ceiling 110 is formed with an opening 110a having a window hole shape (a substantially square front shape).

  That is, the blowout device 1 according to the first embodiment is configured to be turned 90 degrees horizontally, and the plate surface of the blowout panel 3 and the frame surface of the guide frame 2 and the stopper ring 5 are arranged horizontally. ing. In normal operation, as shown in FIG. 7A, the blowout panel 3 blocks the opening 100a by its own weight, and the gas inside the building is not released to the outside, and the internal pressure of the building becomes higher than a predetermined value by accident. When it rises, as shown in FIG. 7 (a), the blowout panel 3 moves upward from the opening 100a to open the opening 100a, and subsequently, when the internal pressure of the building drops, the blowout panel by its own weight 3 moves from the upper side to the opening 100a side to close the opening 100a again. That is, the shapes of the lower surface 2 a and the upper surface 2 b of the guide frame 2, the angle, the arrangement angle of the guide pole 4, the weight of the blowout panel 3, the stopper ring 5 and the like are set to perform such operation. There is.

  According to such an embodiment, the blowout panel 3 is disposed so that the plate surface extends in the lateral direction, and when the internal pressure of the building rises above a predetermined value, the blowout panel 3 moves upward and opens. This is effective when the blowout panel 3 is horizontally disposed on the ceiling 110 or the like to exhaust the gas in the building since the portion 100a is opened. Moreover, since the pressing means is only configured by the weight of the blowout panel 3, the configuration can be simplified, and as a result, the reliability and maintainability can be improved. Here, the lower surface 2a, the upper surface 2b, and the guide pole 4 of the guide frame 2 may be formed to be vertically extended, and the blowout panel 3 may be vertically moved from directly above the opening 100a.

Third Embodiment
FIG. 8 is a side sectional view showing a schematic configuration of the blowout apparatus 1 according to this embodiment, (a) shows a state where the blowout panel 3 blocks the opening 100a, and (b) shows: It is a figure which shows the state which the blowout panel 3 open | released the opening part 100a. In this embodiment, the configuration is different from that of the first embodiment in that the pressing means is constituted by the hydraulic cylinder 6, and the same reference numerals are given to the same configuration as the first embodiment and the explanation thereof is omitted. Do.

  That is, the lower surface 2a of the upper side portion of the guide frame 2 and the upper surface 2b of the lower side portion are formed in a horizontal plane, and the guide pole 4 is disposed to extend horizontally. As a result, the blowout panel 3 moves horizontally and can move back and forth from the side with respect to the opening 100a. Further, a hydraulic cylinder 6 is disposed between the guide frame 2 and the stopper ring 5, and the blowout panel 3 is closed in the direction of closing the opening 100 a via the stopper ring 5 and the guide pole 4 by the hydraulic cylinder 6. I am always pressing.

  Here, when the internal pressure of the building rises to a predetermined value or more, the pressure and the number of the hydraulic cylinders 6 resist the pressure and the blowout panel 3 separates from the opening 100a to open the opening 100a, and thereafter When the internal pressure of the building is lowered, the blowout panel 3 is moved toward the opening 100a by pressing to close the opening 100a. Further, the hydraulic cylinder 6 also has a function as a closer, and when the blowout panel 3 moves to the opening 100a side after the opening 100a is opened, the blowout panel 3 is moved slowly. As a result, the gas in the building can be properly and properly exhausted from the opening 100a, and the blowout panel 3 or the like can be prevented from being damaged by an impact.

  According to the blowout apparatus 1 having such a configuration, as shown in FIG. 8A, the blowout panel 3 closes the opening 100a and gas in the building is not released to the outside normally. Then, when the internal pressure of the building rises to a predetermined value or more due to an accident or the like, as shown in FIG. 8B, the blowout panel 3 separates from the opening 100a and the opening 100a is opened, and the gas in the building is outside Exhausted. As a result, when the internal pressure of the building drops, the blowout panel 3 moves to the opening 100a side by the pressure of the hydraulic cylinder 6, and the opening 100a is closed again, as shown in FIG. 8 (a). Thereafter, when the internal pressure of the building rises again to a predetermined value or more, as shown in FIG. 8 (b), the blowout panel 3 is separated again and the operation of opening the opening 100a is repeated.

  According to such an embodiment, as in the first embodiment, the apparatus can be used again as a blowout apparatus immediately after the opening operation without requiring human work or power. Further, since the pressing means is constituted by the hydraulic cylinder 6, a desired pressing force can be easily obtained with high accuracy by adjusting the pressing force and the number of the hydraulic cylinder 6, and as a result, it is appropriate. The blowout panel 3 can be opened and closed. Further, since the lower surface 2a and the upper surface 2b of the guide frame 2 do not have to be formed into a tapered surface or the guide pole 4 need not be inclined, the structure and the manufacture become easy. Here, although the pressing means is constituted by the hydraulic cylinder 6, it may be constituted by a pneumatic cylinder, a spring or the like.

  The embodiment of the present invention has been described above, but the specific configuration is not limited to the above embodiment, and even if there is a change in design or the like within the scope of the present invention, Included in the invention. For example, in the first and second embodiments described above, although the desired weight and pressing force are obtained only by the weight of the blowout panel 3, a weight is attached to the blowout panel 3 to obtain the desired weight and pressing force. You may As a result, it is possible to easily obtain a desired weight and pressure, and to adjust the weight and pressure.

  The blowout panel 3 is in contact with the outer end face 2c of the guide frame 2 so that the front of the blowout panel 3 is flush with the outer face of the outer wall 100. It may be flush with the outer surface of 100, or the blowout panel 3 may be in direct contact with the outer surface of the outer wall 100. Furthermore, in the first and second embodiments, a closer may be provided so that the blowout panel 3 is slowly closed.

1 blowout device 2 guide frame (guide holder)
2a Upper surface lower surface 2b Lower surface upper surface 2c Outer end surface 21 Roller 22 Guide plate 3 Blowout panel 4 Guide pole (guide holder, guided portion)
5 Stopper ring 6 Hydraulic cylinder (pressing means)
100 Building exterior wall 100a opening

Claims (4)

A plate-like blowout panel that closes the opening formed in the building of the nuclear power plant;
A guide holder for holding the blowout panel so as to be movable in a direction away from and in contact with the opening;
Pressing means for pressing the blowout panel in a direction closing the opening;
When the internal pressure of the building rises above a predetermined value, the blowout panel moves away from the opening against the pressure to open the opening and the internal pressure of the building drops. The press moves the blowout panel toward the opening to close the opening.
A blowout device characterized by The guide holder is
An annular guide frame fitted into the opening;
A guided portion provided on the blow-out panel and guiding the blow-out panel in contact with the inner circumferential surface of the guide frame;
And the opening is closed by the blowout panel coming into contact with the end face of the guide frame, and the opening is opened by the end face of the guide frame being separated from the blowout panel.
The blowout device according to claim 1, characterized in that: The blowout panel is disposed such that the plate surface extends in the vertical direction,
The pressing means is constituted by the weight of the blowout panel,
When the internal pressure of the building rises above a predetermined value, the blowout panel moves diagonally upward from the opening, and when the internal pressure of the building falls, the blowout panel moves obliquely upward to the opening side by its own weight The guide frame and the guided portion are formed to move.
The blowout device according to claim 2, characterized in that. The blowout panel is disposed such that the plate surface extends in the lateral direction,
The pressing means is constituted by the weight of the blowout panel,
When the internal pressure of the building rises above a predetermined value, the blowout panel moves upward from the opening, and when the internal pressure of the building drops, the blowout panel moves from the top to the opening side by its own weight As described above, the guide frame and the guided portion are formed.
The blowout device according to claim 2, characterized in that.

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