JP2013119712A - Water-tight door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water-tight door which enables a large-sized carry-in port to be closed such that the carry-in port is in a water-tight state.SOLUTION: A water-tight door 10 includes: outside door bodies 12a, 12b and inside door bodies 14a, 14b for opening and closing a large-sized carry-in port 100 formed in a building; and packings 20 interposed between the edge of the large-sized carry-in port 100 and the outside door bodies 12a, 12b, and the edge of the large-sized carry-in port 100 and the inside door bodies 14a, 14b, and bringing the edge and the door bodies to a water-tight state when the outside door bodies 12a, 12b and the inside door bodies 14a, 14b are closed. The outside door bodies 12a, 12b and the inside door bodies 14a, 14b are biparting doors and each of the door bodies has an inclined plane at its tip which is opposite to the other tip when the door bodies are closed. The packings are provided at least on one inclined plane of the outside door bodies 12a, 12b and at least on one inclined plane of the inside door bodies 14a, 14b.

Description

  The present invention relates to a watertight door.

  Conventionally, nuclear power plant facilities have been built near the coast in order to secure water used for steam condensate for turbine driving and reactor cooling. Here, in a nuclear power plant facility, a building that needs to protect internal equipment from rainwater and seawater from the outside has a watertight structure.

  For example, according to the power plant described in Patent Document 1, it is necessary to prevent equipment from being damaged by flooding and facilities such as a large seawater pump having a large amount of water source such as large-diameter seawater piping. Safety equipment is contained in the same building, and a watertight door is used in this building.

Japanese Patent No. 2656664

  By the way, nuclear power plant facilities include a reactor building, a turbine building, etc., and these buildings are relatively large, and large facilities and supplies are carried in and out, so a large entrance is provided. There are many cases. For example, in a nuclear reactor building, a large carry-in entrance is provided for carrying in and carrying out large items such as spent fuel and cask.

  Here, in many cases, opening and closing of the large carry-in entrance is performed by a shutter. However, the airtightness and watertightness of the shutter are insufficient, and when seawater approaches the vicinity of the reactor building due to a natural disaster, there is a risk that the equipment in the building will be inundated.

  In addition, the conventional watertight door is relatively small in size because the door size is limited to a passage size. However, since the door is large in the case of a large carry-in entrance, for example, when seawater approaches the building due to a natural disaster, the water pressure applied to the door also increases. It is necessary to devise ways to improve

  An object of the present invention is to provide a watertight door that solves such problems and enables a large carry-in port to be closed so as to be in a watertight state.

  In order to achieve the above object, the present invention has the following configuration.

  (1) A door body that opens and closes a carry-in port formed in a building, and an edge portion of the carry-in port in the building and the door body, and when the door body is closed, A watertight door having a packing that brings the door body into a watertight state, wherein the door body is composed of a pair of first opening / closing bodies with double doors, and one opening / closing body of the pair of first opening / closing bodies has a tip The first opening / closing surface of the pair has a first inclined surface, and the other opening / closing member of the pair of first opening / closing members has a second inclined surface on the surface of the tip portion on the closing direction side, The inclined surface and the second inclined surface contact each other when the pair of first opening / closing bodies are closed, and the packing is at least one of the first inclined surface and the second inclined surface. A watertight door characterized by being provided in

  According to (1), since the contact portions of the pair of first opening / closing bodies are inclined surfaces and the packing is provided, the first opening / closing body is closed with the pair of first opening / closing bodies closed. When pressure is applied, the packing comes into close contact with both inclined surfaces. This makes it possible to close the large carry-in port so as to be in a watertight state.

  (2) In (1), the one opening / closing body has an annular first groove on a peripheral portion of a surface facing the carry-in port including the first inclined surface, and the other opening / closing body The surface facing the carry-in port has a second groove at least at the peripheral edge facing the edge, and the packing is formed in a string shape so that a part protrudes from the surface facing the carry-in port A watertight door embedded in the first groove and the second groove.

  According to (2), when the first opening / closing body is closed, the packing is crushed between the pair of first opening / closing bodies and the edge around the carry-in entrance in the building, so that the water-tight state is achieved. It is possible to make contact. In addition, the inclined surfaces of the pair of first opening / closing bodies can be brought into contact with each other so as to be in a watertight state.

  (3) In (1) or (2), the door body further includes a pair of second opening / closing bodies with double doors that constitute a double door with the pair of first opening / closing bodies, and the pair of first opening / closing bodies. The opening / closing body is disposed inside the building with respect to the pair of second opening / closing bodies and opens / closes outside the building, and the pair of second opening / closing bodies opens / closes inside the building. A watertight door.

  According to (3), since the entrance is opened / closed by the double door, and the first opening / closing body and the second opening / closing body constituting the double door are both abutment portions are inclined surfaces, When the pressure is applied to one of the opening / closing bodies in a state where the first and second opening / closing bodies are closed, the packing is elastically deformed and comes into close contact with both inclined surfaces. Further, even if one of the opening / closing bodies allows water to enter, the other opening / closing body can prevent water from entering. This makes it possible to close the large carry-in port so as to be in a watertight state. Furthermore, for example, by opening the second opening / closing body and then opening the first opening / closing body, the first opening / closing body can be positioned on the side of the second opening / closing body. As a result, the opening allowance of the first opening / closing body and the second opening / closing body can be shared, and the double door can be made compact.

  (4) In (3), one opening / closing body in the pair of second opening / closing bodies has a third inclined surface on a surface in a closing direction at a tip portion, and the other opening / closing in the pair of second opening / closing bodies. The body has a fourth inclined surface on the surface on the opening direction side at the tip portion, and the third inclined surface and the fourth inclined surface abut each other when the pair of second opening / closing bodies are closed, The watertight door, wherein the packing is provided on at least one of the third inclined surface and the fourth inclined surface.

  According to (4), since the contact portion of the pair of second opening / closing bodies is an inclined surface and the packing is provided, the second opening / closing body is closed with the pair of second opening / closing bodies closed. When pressure is applied, the packing comes into close contact with both inclined surfaces. This makes it possible to close the large carry-in port so as to be in a watertight state.

  (5) In (4), one open / close body in the pair of second open / close bodies has an annular third groove portion on a peripheral portion of a surface facing the carry-in port including the third inclined surface, The other opening / closing body of the pair of second opening / closing bodies has a fourth groove portion at a peripheral portion facing at least the edge portion on a surface facing the carry-in port, and the packing is formed in a string shape, A watertight door, wherein the watertight door is embedded in the third groove portion and the fourth groove portion so that a part thereof protrudes from a surface facing the carry-in port.

  According to (5), when the second opening / closing body is closed, the packing is crushed between the pair of second opening / closing bodies and the edge around the entrance in the building, so that the water-tight state is achieved. It is possible to make contact. And it becomes possible to contact | abut so that the inclined surfaces of a pair of 2nd opening-and-closing body may be in a watertight state.

  (6) In (3) to (5), a rod-shaped member is constructed between the pair of first opening / closing bodies and the pair of second opening / closing bodies.

  According to (6), the rod-like member becomes a so-called replacement rod, and it is possible to prevent the pair of first opening / closing bodies and the pair of second opening / closing bodies from being opened due to external pressure.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the watertight door which can close a large sized entrance so that it may be in a watertight state.

It is explanatory drawing which shows an example of arrangement | positioning of a nuclear power plant facility. It is a top view which shows the outline | summary of the watertight door 10 in one Embodiment of this invention. It is a front view which shows the external appearance of the outer surface of outer side door body 12a, 12b and inner side door body 14a, 14b. 3 is an explanatory view showing a joint structure between a start end and a terminal end of a packing 20. FIG. It is explanatory drawing which shows the contact state of inclined surface 13a (15a), 13b (15b). It is a front view which shows the external appearance of the inner surface of outer side door body 12a, 12b and inner side door body 14a, 14b. 3 is a perspective view showing a configuration of a reinforcing member 40. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an explanatory diagram showing an example of the arrangement of nuclear power plant facilities. As the nuclear power plant facilities, there are a reactor building 70, a turbine building 72, a water intake building 74, an emergency power supply facility 76, and the like. The building is built on the site along the coast.

  A nuclear reactor is arranged in the nuclear reactor building 70. The turbine building 72 is provided with a turbine that is rotated by steam generated by the equipment of the reactor building 70. The intake building 74 is equipped with equipment such as a pump for pumping seawater and supplying it to the reactor building 70 and the turbine building 72 for condensing steam used for cooling the reactor and rotating the turbine. Has been. The emergency power supply facility 76 is a facility used for emergency.

  Further, the reactor building 70 includes a large entrance 100 for carrying in and out large items such as spent fuel and cask, and further includes a watertight door 10 that opens and closes the large entrance 100. . The turbine building 72 and the intake building 74 are also provided with a large entrance for carrying in and out large facilities and materials, and a watertight door for opening and closing the large entrance. In the following description, a case where the watertight door 10 is installed at the carry-in port of the reactor building 70 will be described as an example.

FIG. 2 is a plan view showing an outline of the watertight door 10 in one embodiment of the present invention. The watertight door 10 includes a pair of outer door bodies 12a and 12b corresponding to the door body and the second opening / closing body, a pair of inner door bodies 14a and 14b corresponding to the door body and the first opening / closing body, a hinge 16, and a packing. 20.
The outer door bodies 12a and 12b and the inner door bodies 14a and 14b are plate-like members having a thickness formed by interposing a steel frame member between two rectangular metal plates. The outer door body 12a and the outer door body 12b, and the inner door body 14a and the inner door body 14b are the same type.

  The hinge 16 is configured to rotatably install the pair of outer door bodies 12a and 12b and the pair of inner door bodies 14a and 14b on both sides of the large-sized carry-in entrance 100 of the building.

  The packing 20 is a rubber member provided on the outer door bodies 12a and 12b and the inner door bodies 14a and 14b. When the outer door bodies 12a and 12b and the inner door bodies 14a and 14b are closed, the packing 20 is deformed between the edge of the large entrance 100 and the outer door bodies 12a and 12b and the inner door bodies 14a and 14b. By interposing in a state, the space between the edge of the large entrance 100 and the outer door bodies 12a and 12b and the inner door bodies 14a and 14b is made watertight.

  The reactor building 70 includes a door hole 80 for accommodating the outer door bodies 12a and 12b and the inner door bodies 14a and 14b therein. An outer carry-in port 100 a is formed in a part of the wall material constituting the door hole 80. In addition, an inner carry-in port 100b is formed in a wall material facing the wall material in which the outer carry-in port 100a is formed. That is, the large entrance 100 of the reactor building 70 is composed of an outer entrance 100a and an inner entrance 100b, and the outer entrance 100a and the inside entrance 100b are large enough to carry in and out spent fuel and cask, respectively. It is.

  The outer door bodies 12a and 12b are installed so as to open and close the outer carry-in port 100a by double doors by hinges 16 at predetermined portions at the edge of the wall material on both sides of the outer carry-in port 100a. The inner door bodies 14a and 14b are installed at predetermined positions on the edge of the wall material on both sides of the inner carry-in port 100b so as to open and close the inner carry-in port 100b by double doors with hinges 16.

  Here, the outside door bodies 12a and 12b are subjected to double door opening toward the inside of the building, and the inside door bodies 14a and 14b are double door opening toward the outside of the building. Thus, the outer door bodies 12a and 12b and the inner door bodies 14a and 14b constitute a double door. For convenience of the following description, the surfaces facing the inside of the door hole 80 in the outer door bodies 12a, 12b and the inner door bodies 14a, 14b in the state where the outer door bodies 12a, 12b and the inner door bodies 14a, 14b are closed are the inner surfaces. The surface opposite to the inner surface will be referred to as the outer surface. Further, in the outer door bodies 12a and 12b and the inner door bodies 14a and 14b, the end portions that are rotatably supported by the hinges 16 are referred to as fixed end portions, and the end portions that face each other when closed are referred to as tip portions. To do.

  The outer door bodies 12a and 12b and the inner door bodies 14a and 14b have the same length in the vertical direction, but the outer door bodies 12a and 12b are set to be longer in the horizontal direction. The length from the outer door bodies 12a, 12b to the inner door bodies 14a, 14b is set slightly longer than the lateral length of the outer door bodies 12a, 12b. For this reason, when the outer door bodies 12a and 12b are viewed from the front, as shown in FIG. 2B, the rotation shafts of the inner door bodies 14a and 14b are arranged closer to the center than the outer door bodies 12a and 12b. ing.

  Inclined surfaces 13a and 13b corresponding to the third and fourth inclined surfaces are formed at the front ends of the outer door bodies 12a and 12b. Inclined surfaces 15a and 15b corresponding to the first and second inclined surfaces are formed at the front ends of the inner door bodies 14a and 14b. The angles of the inclined surfaces 13a and 13b and the inclined surfaces 15a and 15b can be set to 30 ° to 60 °, but 45 ° is desirable.

  The outer carry-in port 100a is formed slightly smaller than a rectangle formed by closing the outer door body 12a and the outer door body 12b. For this reason, when the outer door body 12a and the outer door body 12b are closed, the outer peripheral edge portions of the outer door bodies 12a and 12b come into contact with the edge of the wall material forming the outer carry-in port 100a.

  Similarly, the inner carry-in port 100b is formed slightly smaller than a rectangle formed by closing the inner door body 14a and the inner door body 14b. For this reason, when the inner side door body 14a and the inner side door body 14b are closed, the peripheral edge part of the outer surface of the inner side door bodies 14a and 14b contact | abuts the edge of the wall material which forms the inner side entrance port 100b.

  When opening the large carry-in entrance 100, first, the outer door bodies 12a and 12b are rotated to position the distal ends of the outer door bodies 12a and 12b to the sides of the inner door bodies 14a and 14b. Next, the inner door bodies 14a and 14b are rotated to position the inner door bodies 14a and 14b on the sides of the outer door bodies 12a and 12b. Thereby, as shown in FIG.1 (b), the large sized entrance 100 is open | released. When closing the large carry-in entrance 100, first, the inner door bodies 14a and 14b are rotated to bring the inclined surfaces 15a and 15b of the inner door bodies 14a and 14b into contact with each other, and then the outer door body 12a. , 12b are rotated to bring the inclined surfaces 13a, 13b of the outer door bodies 12a, 12b into contact with each other. Thereby, as shown in FIG. 1A, the large entrance 100 is closed by the inner door bodies 14a and 14b and the outer door bodies 12a and 12b.

  FIG. 3 is a front view showing the outer appearance of the outer door bodies 12a and 12b and the inner door bodies 14a and 14b, and FIG. 3 (a) shows the outer faces of the outer door bodies 12a and 12b. ) Indicates the outer surface of the inner door bodies 14a, 14b. FIG. 5 is a plan view showing the configuration of the distal ends of the outer door bodies 12a and 12b and the inner door bodies 14a and 14b.

  As shown in FIG. 3A, the outer door body 12a includes a groove 18a corresponding to the third groove portion and a groove 18b corresponding to the fourth groove portion. The groove 18a is formed in an annular shape so as to go around the outer end of the outer door body 12a. The groove 18b circulates from the one end in the vertical direction at the front end of the outer surface of the outer door body 12b to the end of the outer surface in a U shape, passes from the front end of the outer surface to the front end of the inner surface, It is formed in an annular shape so as to be connected to the end. Here, since the inclined surface 13a of the front-end | tip part of the outer side door body 12a has faced the outer side (opposite side of the door hole 80), it is contained in the outer surface of the outer side door body 12a. For this reason, the groove | channel 18a is formed in the inclined surface 13a of the front-end | tip part of the outer side door body 12a. On the other hand, a part of the groove 18b is formed on the inclined surface 13b (see FIG. 1) at the tip of the outer door body 12b. Here, both ends of a part of the groove 18b formed in the inclined surface 13b (see FIG. 1) are formed in an oblique direction of about 45 ° with respect to the tip side of the outer door body 12a.

  The grooves 18a and 18b are for fixing the packing 20. The packing 20 is formed of a cylindrical string-like rubber member, and is embedded in the grooves 18a and 18b so that a part thereof protrudes from the outer surface of the outer door bodies 12a and 12b. Specifically, the starting end of the packing 20 is embedded in a predetermined position of the grooves 18a and 18b, and the packing 20 is embedded in the grooves 18a and 18b. When the packing 20 reaches a predetermined position in the grooves 18a and 18b, the starting end and the terminal end of the packing 20 are cut obliquely in accordance with the predetermined position, and as shown in FIG. The adhesive 20a is applied to the cut surfaces of the end and the end, and the start end, the end and the cut surface are bonded to each other. Then, this bonded portion is embedded in the grooves 18a and 18b. At this time, as shown in FIG. 4B, the adhesive surface between the starting end and the terminal end of the packing 20 is directed toward the outer surface side of the outer door bodies 12a and 12b, and the adhesive surface is the outer surface of the outer door bodies 12a and 12b. Embed in parallel or close to parallel. Thereby, the packing 20 is fixed to the outer door bodies 12a and 12b.

  As shown in FIG. 3B, the inner door 14a includes a groove 18c corresponding to the first groove and a groove 18d corresponding to the second groove. The groove 18c is formed in an annular shape so as to go around the end of the outer surface of the inner door body 14a. The groove 18d circulates in the U-shape from one end portion in the vertical direction at the front end portion of the outer surface of the inner door body 14b to the other end through the front end portion of the inner surface from the front end portion of the outer surface. It is formed in an annular shape so as to be connected to the end. Here, since the inclined surface 15a of the front-end | tip part of the inner side door body 14a has faced the outer side (opposite side of the door hole 80), it is contained in the outer surface of the inner side door body 14a. For this reason, the groove | channel 18c is formed in the inclined surface 15a of the front-end | tip part of the inner side door body 14a. On the other hand, a part of the groove 18d is formed on the inclined surface 15b (see FIG. 1) at the tip of the inner door body 14b. Here, both ends of a part of the groove 18d formed in the inclined surface 15b (see FIG. 1) are formed in an oblique direction of about 45 ° with respect to the side of the tip of the inner door body 14b.

  The grooves 18c and 18d fix the packing 20 similarly to the grooves 18a and 18b. As in the case of the outer door bodies 12a and 12b, the packing 20 is embedded in the grooves 18c and 18d so as to partially protrude from the outer surfaces of the inner door bodies 14a and 14b. Also, the start and end of the packing 20 are cut obliquely in the same manner as in the case of the outer door bodies 12a and 12b, and an adhesive is applied to the cut surface between the start and end of the packing 20 as shown in FIG. 20a is applied, and the start end, end and cut face are bonded. Then, this bonded portion is embedded in the grooves 18c and 18d. At this time, as shown in FIG. 4B, the adhesive surface between the starting end and the terminal end of the packing 20 is directed to the outer surface side of the inner door bodies 14a, 14b, and the adhesive surface is the outer surface of the inner door bodies 14a, 14b. Embed in parallel or close to parallel.

  Moreover, the inner side door body 14a is provided with the child door 22 which enables an operator to go in and out. The child door 22 opens and closes an entrance / exit that is formed in the inner door body 14 a and allows a worker to enter and exit, and opens and closes toward the inside of the door hole 80. Moreover, packing (not shown) is provided in the peripheral part of the child door 22, and when the child door 22 is closed, between the periphery of the child door 22 and the edge of the doorway in the inner door body 14a. By interposing the packing (not shown) in a crushed state, the child door 22 and the inner door body 14a are in a watertight state.

  And when outer door body 12a, 12b is closed, as shown to Fig.5 (a), between the inclined surface 13a of the outer door body 12a, and the inclined surface 13b of the outer door body 12b, it is inclined surface 13a and inclination. A packing 20 embedded in the surface 13b is interposed. Here, as shown in FIG. 5 (b), when the inclined surface 13a and the inclined surface 13b abut, the packing 20 between the inclined surface 13a and the inclined surface 13b is the same as the packing 20 and the inclined surface of the inclined surface 13a. The packing 20 of 13b is in close contact and formed into an annular shape. And as shown in FIG.5 (c), the packing 20 will be in the state crushed between the inclined surface 13a and the inclined surface 13b, and will contact | adhere between both the inclined surfaces 13a and 13b, and will be in a watertight state. At this time, since both end portions of the packing 20 on the inclined surface 13b are oriented in an oblique direction of about 45 ° with respect to the tip side of the inner door body 14b, interference with the packing 20 on the inclined surface 13a is avoided. Can do.

  Similarly, when the inner doors 14a and 14b are closed, as shown in FIG. 5 (a), the inclined surfaces 15a and 15b between the inclined surface 15a of the inner door 14a and the inclined surface 15b of the inner door 14b. A packing 20 embedded in the inclined surface 15b is interposed. Here, as shown in FIG. 5 (b), when the inclined surface 15a and the inclined surface 15b abut, the packing 20 between the inclined surface 15a and the inclined surface 15b is the same as the packing 20 of the inclined surface 15a and the inclined surface. The 15b packing 20 is in close contact with each other to form an annular shape. And as shown in FIG.5 (c), the packing 20 will be in the state crushed between the inclined surface 15a and the inclined surface 15b, and will contact | adhere between both the inclined surfaces 15a and 15b, and will be in a watertight state. At this time, since both end portions of the packing 20 on the inclined surface 15b are oriented in an oblique direction of about 45 ° with respect to the tip side of the inner door body 14b, interference with the packing 20 on the inclined surface 15a is avoided. Can do.

  Further, the packing 20 in the outer door body 12a, 12b other than the inclined surface 13a abuts on the edge of the outer carry-in port 100a in the door hole 80, and between the edge and the outer door body 12a, 12b. It will be in a crushed state. Thereby, the door hole 80 and the outer side door bodies 12a and 12b will be in a watertight state.

  The same applies to the inner door bodies 14a and 14b, and the packing 20 in a portion other than the inclined surface 15a in the inner door bodies 14a and 14b abuts on the edge portion of the inner carry-in port 100b in the door hole 80, and the edge portion. It will be in the state crushed between inner side door bodies 14a and 14b. Thereby, the door hole 80 and the inner side door bodies 14a and 14b will be in a watertight state.

  Although not shown, the door hole 80 includes a driving device that drives the outer door bodies 12a and 12b to open and close, and a driving device that drives the inner door bodies 14a and 14b to open and close. In the present embodiment, as a driving device, a device that opens and closes the outer door bodies 12a and 12b and the inner door bodies 14a and 14b by air pressure, and a device that electrically opens and closes the emergency power supply facility 76 as a power source. Is provided.

  6 is a front view showing the outer appearance of the inner surfaces of the outer door bodies 12a and 12b and the inner door bodies 14a and 14b. FIG. 3 (a) shows the inner surfaces of the outer door bodies 12a and 12b, and FIG. ) Indicates the inner surfaces of the inner door bodies 14a and 14b.

  The outer door body 12a includes a receiving portion 30a, and the outer door body 12b includes a receiving portion 30b. The receiving portions 30a and 30b are disposed at the distal end portions of the outer door bodies 12a and 12b, and the receiving portions 30a and 30b face each other when the outer door bodies 12a and 12b are closed. And the box body by which the upper part was open | released by the receiving parts 30a and 30b is formed. One end of a reinforcing member 40 corresponding to the rod-shaped member shown in FIG. 7 is attached to the receiving portions 30a and 30b.

  The inner door body 14a includes a receiving portion 32a, and the inner door body 14b includes a receiving portion 32b. The receiving portions 32a and 32b are disposed at the front ends of the inner door bodies 14a and 14b, and the receiving portions 32a and 32b face each other when the inner door bodies 14a and 14b are closed. And the box part by which the upper part was open | released by the receiving parts 32a and 32b is formed. The other end of the reinforcing member 40 shown in FIG. 7 is attached to the receiving portions 32a and 32b.

  The receiving portions 30a and 30b of the outer door body 12a and the receiving portions 32a and 32b of the inner door body 14a are respectively provided in plural, and the receiving portions 30a and 30b and the receiving portions 32a and 32b are opposed to each other in pairs. Yes.

  FIG. 7 is a perspective view showing the configuration of the reinforcing member 40. The reinforcing member 40 has a configuration in which square flanges 44 and 44 are fixed to both end portions of a cylindrical shaft 42. The shaft 42 has a length from the inner surface of the outer door body 12a, 12b in the closed state to the inner surface of the inner door body 14a, 14b, and the flanges 44, 44 have the receiving portions 30a, 30b and the receiving portion 32a. , 32b. Here, the shaft 42 is preferably made of a lightweight metal such as aluminum.

  The reinforcing member 40 is used, for example, when the pressure applied to the outer door bodies 12a and 12b is large and the outer door bodies 12a and 12b may be opened, and is usually stored in the door hole 80. . In addition, instruments used for attaching the reinforcing member 40, such as stepladders, are also stored in the door hole 80 in advance.

  For example, when an earthquake early warning or tsunami warning is issued by the Japan Meteorological Agency, the outer door bodies 12a and 12b and the inner door bodies 14a and 14b are closed. Next, an operator enters the door hole 80 from the child door 22, and attaches to the flanges 44 and 44 of the reinforcing member 40 to the receiving portions 30a and 30b and the receiving portions 32a and 32b, and the outer door bodies 12a and 12b A reinforcing member 40 is installed between the inner door bodies 14a and 14b. This makes it more difficult to open the outer door bodies 12a and 12b.

  According to the present embodiment configured as described above, the contact portions of the pair of double doors of the outer doors 12a and 12b are the inclined surfaces 13a and 13b, and the packing 20 is provided on the inclined surface 13a. When pressure is applied to the outer door bodies 12a and 12b with the door bodies 12a and 12b closed, the packing 20 comes into close contact with both the inclined surfaces 13a and 13b. Thereby, it becomes possible to close the large outside carry-in port 100a so as to be in a watertight state. Similarly, the contact portion of the pair of inner doors 14a and 14b with double doors is inclined surfaces 15a and 15b, and the inner door bodies 14a and 14b are closed because the packing 20 is provided on the inclined surface 15a. When pressure is applied to the inner door bodies 14a and 14b in this state, the packing 20 comes into close contact with both the inclined surfaces 15a and 15b. This makes it possible to close the large inner carry-in port 100b so as to be in a watertight state.

  Moreover, according to this embodiment, since the large entrance 100 is opened and closed by the double doors of the outer door bodies 12a and 12b and the inner door bodies 14a and 14b, even if the outer door bodies 12a and 12b allow the ingress of water. The inner door bodies 14a and 14b can prevent water from entering. This makes it possible to close the large large entrance 100 so as to be in a watertight state.

  According to the present embodiment, after the outer door bodies 12a and 12b are opened, the outer door bodies 12a and 12b are positioned on the sides of the inner door bodies 14a and 14b by opening the inner door bodies 14a and 14b. Is possible. As a result, it is possible to share the opening allowance of the outer door bodies 12a and 12b and the inner door bodies 14a and 14b, and the double door can be made compact.

  Further, according to the present embodiment, since the reinforcing material 40 is installed between the outer door bodies 12a, 12b and the inner door bodies 14a, 14b, the reinforcing material 40 becomes a so-called refilling rod, and pressure from the outside. Therefore, it is possible to prevent the outer door bodies 12a and 12b and the inner door bodies 14a and 14b from being opened.

  Further, according to the present embodiment, the outer door bodies 12a and 12b have the annular grooves 18a and 18b on the peripheral edge of the surface facing the outer carry-in port 100a, and the inner door bodies 14a and 14b are formed on the inner carry-in port 100b. Are provided with annular grooves 18c and 18d on the peripheral edge of the surface facing each other. In particular, grooves 18a and 18c are also formed in the inclined surface 13a of the outer door body 12a and the inclined surface 15a of the inner door body 14a, and the packing 20 is formed in a string shape, and the outer carry-in entrance 100a and the inner carry-in are formed. It is embedded in the grooves 18a and 18c so that a part protrudes from the surface facing the mouth 100b. As a result, the outer door bodies 12a, 12b and the inner door bodies 14a, 14b can be brought into contact with the outer carry-in port 100a and the edge around the inner carry-in port 100b in the building so as to be in a watertight state. The inclined surfaces 13a and 13b and the inclined surfaces 15a and 15b can be brought into contact with each other so as to be in a watertight state.

  Further, according to the present embodiment, by setting the inclination of the inclined surface to 45 °, when pressure is applied to the first opening / closing body in a state where the pair of first opening / closing bodies are closed, the packing 20 is It comes to adhere to an inclined surface reliably.

  Further, according to the present embodiment, the adhesive surface between the starting end and the terminal end of the packing 20 is directed to the outer surface side of the outer door bodies 12a, 12b, and the adhesive surface is parallel to or parallel to the outer surfaces of the outer door bodies 12a, 12b. It is buried so as to be close. As a result, when seawater approaches the reactor building 70, the water pressure surface received by the outer door bodies 12a and 12b from seawater and the joint surface of the packing 20 are parallel or close to parallel. It will be in the state which pushes, and it will become possible to maintain the joining state of the packing 20.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment. For example, according to the above-described embodiment, the reinforcing member 40 is attached to reinforce the outer door bodies 12a and 12b. However, the present invention is not limited thereto, and the inside of the door hole 80 is, for example, the outer door bodies 12a, 12b and The inner door bodies 14 a and 14 b are closed to be watertight and airtight, and a compressed air cylinder is provided in the door hole 80. When the reactor building 70 needs to be watertight, first, the outer door bodies 12a and 12b and the inner door bodies 14a and 14b are closed. Next, an operator enters the door hole 80 from the child door 22, operates the open / close valve of the compressed air cylinder to introduce compressed air of about 0.1 MPa into the door hole 80, and the atmospheric pressure in the door hole 80. To increase. Accordingly, the outer door bodies 12a and 12b and the inner door bodies 14a and 14b are pressed outward by the atmospheric pressure in the door hole 80, and the watertight state of the outer door bodies 12a and 12b can be maintained. .

  Moreover, in embodiment mentioned above, although the annular grooves 18a-18d were formed with respect to the outer side door body 12b and the inner side door body 14b, it is not restricted to it, For example, inclined surface 13b, 15b (refer FIG. 2). The grooves 18b and 18d formed on the back side may be omitted to form a U shape.

DESCRIPTION OF SYMBOLS 10 Watertight door 12a, 12b Outer door body 14a, 14b Inner door body 16 Hinge 18a-18d Groove 20 Packing 22 Child door 30a, 30b, 32a, 32b Receiving part 40 Reinforcement material 42 Shaft 44 Flange 70 Reactor building 72 Turbine building 74 Intake building 76 Emergency power supply facility 80 Door hole 100 Large loading port 100a Outside loading port 100b Inside loading port

Claims (6)

A door body that opens and closes a carry-in entrance formed in the building;
A watertight door having a packing interposed between the edge of the carry-in entrance and the door body in the building, and when the door body is closed, makes the edge and the door body watertight. And
The door body is composed of a pair of first opening / closing bodies with double doors,
One opening / closing body in the pair of first opening / closing bodies has a first inclined surface on a surface on the opening direction side in the tip portion,
The other opening / closing body of the pair of first opening / closing bodies has a second inclined surface on the surface in the closing direction at the tip portion,
The first inclined surface and the second inclined surface contact each other when the pair of first opening / closing bodies are closed,
The watertight door, wherein the packing is provided on at least one of the first inclined surface and the second inclined surface. The one opening / closing body has an annular first groove portion at a peripheral portion of a surface facing the carry-in port including the first inclined surface,
The other opening / closing body has a second groove portion at a peripheral portion facing at least the edge portion on a surface facing the carry-in port,
2. The watertight door according to claim 1, wherein the packing is formed in a string shape and embedded in the first groove portion and the second groove portion so that a part thereof protrudes from a surface facing the carry-in port. The door body further includes a pair of second opening / closing bodies with double doors that constitute a double door with the pair of first opening / closing bodies,
The pair of first opening / closing bodies are arranged inside the building with respect to the pair of second opening / closing bodies and open / close to the outside of the building,
3. The watertight door according to claim 1, wherein the pair of second opening / closing bodies opens and closes inside the building. 4. One opening / closing body in the pair of second opening / closing bodies has a third inclined surface on the surface in the closing direction at the tip portion,
The other opening / closing body of the pair of second opening / closing bodies has a fourth inclined surface on the surface in the opening direction side at the tip portion,
The third inclined surface and the fourth inclined surface are in contact with each other when the pair of second opening / closing bodies are closed,
The watertight door according to claim 3, wherein the packing is provided on at least one of the third inclined surface and the fourth inclined surface. One opening / closing body in the pair of second opening / closing bodies has an annular third groove portion on a peripheral portion of a surface facing the carry-in port including the third inclined surface,
The other opening / closing body of the pair of second opening / closing bodies has a fourth groove portion at a peripheral portion facing at least the edge portion on a surface facing the carry-in port,
5. The watertight door according to claim 4, wherein the packing is formed in a string shape and embedded in the third groove portion and the fourth groove portion so that a part thereof protrudes from a surface facing the carry-in port.   The watertight door according to any one of claims 3 to 5, wherein a rod-shaped member is installed between the pair of first opening / closing bodies and the pair of second opening / closing bodies.

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