JP5608705B2 - Method for manufacturing corrosion-resistant concrete tank and corrosion-resistant concrete tank - Google Patents

Description

  The present invention relates to a method for manufacturing a corrosion-resistant concrete tank and a corrosion-resistant concrete tank, and more particularly to a method for manufacturing a corrosion-resistant concrete tank for detecting leakage liquid and a corrosion-resistant concrete tank.

  In a corrosion-resistant concrete tank such as a chemical storage tank or a waste liquid tank in which a corrosive storage liquid is stored underground, a technique for detecting leakage of the storage liquid has been proposed. For example, Patent Document 1 discloses a corrosion-resistant concrete tank in which the inner surface of a rectangular parallelepiped concrete casing is covered with a number of rectangular FRP corrosion-resistant sheets having corrosion resistance against stored liquid. The anticorrosion sheets bonded to the inner surface of the concrete casing through the adhesive layer are in a state of being slightly separated so as to form a leak groove between which the leaked content liquid can flow. The surfaces of these leak grooves are closed by welding the thermoplastic tape, and a path for guiding leaked liquid is formed.

  And a hook-shaped member is fixed to the ridgeline part of the inner surface of a concrete frame by welding. A path formed by a leak groove passes through the inside of these bowl-shaped members. When a crack or breakage occurs in the corrosion-resistant sheet, a part of the leaked liquid that flows out flows into a nearby leak groove, and is stored in the bowl-shaped member F through the bowl-shaped member. A leak detector is disposed in the bowl-shaped member. When the leak detector detects the leaked liquid stored in the bowl-shaped member, leakage of the stored liquid is detected.

JP-A-11-343753

  By the way, the importance of preventing leakage of stored liquid into soil in a corrosion-resistant concrete tank is increasing due to stricter regulations on soil contamination in recent years. However, simply doubling the concrete frame of the corrosion-resistant concrete tank or installing a complicated mechanism for detecting leaked liquid will greatly reduce the internal capacity of the corrosion-resistant concrete tank and increase the manufacturing cost associated with the complicated structure. With an increase, it is not preferable.

  The present invention has been made in view of the above problems, and it is possible to prevent leakage liquid from leaking outside the corrosion-resistant concrete tank without almost reducing the content of the corrosion-resistant concrete tank, and to ensure that the leakage liquid has a simple structure. It is an object of the present invention to provide a method for producing a corrosion-resistant concrete tank and a corrosion-resistant concrete tank that can produce a corrosion-resistant concrete tank that can be detected in a simpler manner.

  The present invention provides a corrosion-resistant resin layer laminating step of laminating a corrosion-resistant and thermosetting corrosion-resistant resin layer on the inner surface of a concrete frame of a corrosion-resistant concrete tank, and a surface of the corrosion-resistant resin layer laminated in the corrosion-resistant resin layer laminating step. A first anti-corrosion resin plate bonding step in which a plurality of first anti-corrosion resin plates having corrosion resistance and flexibility are bonded to each other with a gap between the end surfaces, and a first anti-corrosion resin plate bonded in the anti-corrosion resin plate bonding step A second corrosion-resistant resin plate having corrosion resistance and flexibility is bonded to the space between the resin plates, and a leakage path defined by the corrosion-resistant resin layer, the end surface of the first corrosion-resistant resin plate, and the second corrosion-resistant resin plate is formed. Leak detection that installs a leak detector that detects leaking liquid that has leaked from the corrosion path of the second corrosion-resistant resin plate to be formed and leaked from the corrosion-resistant concrete tank and has flowed through the leak path formed in the second corrosion-resistant resin plate adhesion step. Instrument installation A method for producing a corrosion concrete tank including and.

  According to this configuration, in the corrosion-resistant resin layer laminating step, the corrosion-resistant resin layer having corrosion resistance and thermosetting property is laminated on the inner surface of the concrete frame of the corrosion-resistant concrete tank. By laminating a corrosion-resistant resin layer that has corrosion resistance, even if the liquid stored in the corrosion-resistant concrete tank above the corrosion-resistant resin layer leaks, the leak-proof liquid can directly contact the concrete frame by the corrosion-resistant resin layer. Therefore, it is possible to prevent leakage liquid from leaking out of the corrosion-resistant concrete tank without almost reducing the content of the corrosion-resistant concrete tank. In addition, by stacking the thermosetting anticorrosion resin layer, it is possible to prevent the anticorrosion resin layer from being altered in the subsequent steps.

  In the first anti-corrosion resin plate bonding step, a plurality of first anti-corrosion resin plates having corrosion resistance and flexibility on the surface of the anti-corrosion resin layer laminated in the anti-corrosion resin layer lamination step are spaced apart from each other. Glue while emptying. In order to adhere the first anticorrosive resin plate having corrosion resistance onto the surface of the anticorrosive resin layer, the liquid stored in the anticorrosive concrete tank is caused by a double corrosion resistant layer combined with the underlying anticorrosive resin layer. Leakage outside the corrosion-resistant concrete tank can be prevented. Moreover, since the several 1st corrosion-resistant resin board which has a softness | flexibility is adhere | attached on the surface of a corrosion-resistant resin layer, it can prevent that a 1st corrosion-resistant resin board is cracked. Further, a plurality of first anti-corrosion resin plates are bonded on the surface of the anti-corrosion resin layer with a space between the end surfaces, thereby leaking a leakage path in a subsequent second anti-corrosion resin plate bonding step. Can be formed very easily.

  In the second anti-corrosion resin plate bonding step, a second anti-corrosion resin plate having corrosion resistance and flexibility is bonded on the interval between the first anti-corrosion resin plates bonded in the anti-corrosion resin plate bonding step, and the anti-corrosion resin layer, A leak path defined by the end surface of the first anticorrosion resin plate and the second anticorrosion resin plate is formed. As a result, a leak path for inducing the leaked liquid can be formed very easily. Moreover, since the 2nd corrosion-proof resin board has corrosion resistance and a softness | flexibility similarly to a 1st corrosion-resistant resin board, the liquid stored in the corrosion-resistant concrete tank is hard to leak and to be hard to break. Therefore, the leakage of the liquid stored in the corrosion-resistant concrete tank is almost caused from the adhesion site between the first corrosion-resistant resin plate and the second corrosion-resistant resin plate. Therefore, the location where the stored liquid stored in the corrosion-resistant concrete tank leaks can be limited, and the leaked liquid flows into the leakage path defined by the corrosion-resistant resin layer, the end surface of the first corrosion-resistant resin plate, and the second corrosion-resistant resin plate. It will be naturally induced.

  In the leak detector installation step, a leak detector is installed that detects the leaked liquid that has leaked from the corrosion-resistant concrete tank and has flowed through the leak path formed in the second corrosion-resistant resin plate bonding step. Thereby, the leakage of the liquid stored in the corrosion-resistant concrete tank can be reliably detected with a simple structure.

  From the above, it is possible to prevent leakage liquid from leaking out of the corrosion-resistant concrete tank without almost reducing the content of the corrosion-resistant concrete tank, and it is easier to create a corrosion-resistant concrete tank that can reliably detect leaked liquid with a simple structure. It can be manufactured by the method.

  In this case, in the second anticorrosion resin plate bonding step, it is preferable to enclose a conductive wire in an adhesion portion between the first anticorrosion resin plate and the second anticorrosion resin plate.

  According to this configuration, in the second anti-corrosion resin plate bonding step, the conductive wire is enclosed in the bonding portion between the first anti-corrosion resin plate and the second anti-corrosion resin plate. The leakage of the liquid stored in the corrosion-resistant concrete tank is almost limited to the adhesion site between the first corrosion-resistant resin plate and the second corrosion-resistant resin plate. Therefore, a leak location can be identified early by performing a spark test in which a high voltage is applied to the conductive wire and a spark is generated at the leak location.

  In this case, in the leak detector installation step, a leak liquid storage section for storing the leaked liquid that has flowed through the leak path and reached the bottom of the leak path is installed, and the leak detector is installed in the leak liquid storage section Is preferred.

  According to this configuration, in the leak detector installation step, the leak liquid storage section for storing the leak liquid flowing through the leak path and reaching the lowermost portion of the leak path is installed, and the leak detector is installed in the leak liquid storage section. Install. For this reason, the leak detector naturally reaches the lowermost part of the leak path by gravity and detects the leaked liquid stored in the leaked liquid storage part with the leak detector. It is sufficient to install the leak detector only, and the leak detector can be easily installed.

  In this case, in the first anticorrosive resin plate bonding step, the concrete casing having the bottom surface, the side surface, and the corner portion where the bottom surface and the side surface intersect with each other, the space is located on the bottom surface and the side surface, and at least one end of the space is a corner. In the second anti-corrosion resin plate bonding step, the second anti-corrosion resin plate is bonded so that the lowermost part of the leak path leads to the corner, and the leak detector installation step In this case, by covering the corner with the wall surface, the stored liquid stored in the corrosion-resistant concrete tank and the leaked liquid are separated by the wall surface, and the inside of the recumbent member communicates with the lowermost part of the leak path, and the side surface Covering the wall with the wall, the stored liquid and the leaked liquid are separated by the wall surface, the interior communicates with the inside of the recumbent member, and the vertical wall member whose upper end reaches above the liquid level of the stored liquid As a leakage storage part It is preferred.

  According to this configuration, in the first corrosion-resistant resin plate bonding step, with respect to the concrete frame having the bottom surface, the side surface, and the corner portion where the bottom surface and the side surface intersect, the space is located on the bottom surface and the side surface, The first anti-corrosion resin plate is bonded so that one end is located at the corner, and in the second anti-corrosion resin plate bonding step, the second anti-corrosion resin plate is bonded so that the lowermost part of the leak path leads to the corner. In the vessel installation process, the recumbent member that separates the stored liquid stored in the corrosion-resistant concrete tank and the leaked liquid by covering the corners with the wall surface, and the inside of which is in communication with the lowest part of the leak path; Covering part of the side surface with the wall surface separates the stored liquid and leaked liquid by the wall surface, the interior leads to the inside of the recumbent member, and the upper end reaches above the liquid level of the stored liquid Installed as a leakage storage part That. For this reason, the leakage liquid storage part for storing a leakage liquid can be installed only by installing a horizontal gutter member in the corner | angular part of a concrete frame, and installing a vertical gutter member in a part of side surface of a concrete frame.

  In the first anticorrosion resin plate bonding step, it is preferable that the first anticorrosion resin plates having a rectangular shape are bonded so that the intervals form a T shape.

  According to this configuration, in the first anticorrosion resin plate bonding step, the first anticorrosion resin plates having a rectangular shape are bonded so that the intervals form a T shape. Thereby, it can prevent that the location where space | intervals cross | intersect weakens.

  The present invention also provides a concrete housing for a corrosion-resistant concrete tank, a corrosion-resistant resin layer having corrosion resistance and thermosetting laminated on the inner surface of the concrete housing, and between the end surfaces of the corrosion-resistant resin layer. A plurality of first anticorrosion resin plates having corrosion resistance and flexibility bonded with a space therebetween, and a second anticorrosion resin plate having corrosion resistance and flexibility bonded on the respective intervals of the first anticorrosion resin plates And a leak path that is partitioned by the corrosion-resistant resin layer, the end face of the first corrosion-resistant resin plate, and the second corrosion-resistant resin board, and leak detection that leaks from the corrosion-resistant concrete tank and detects leaked liquid that has flowed through the leak path in at least one place. It is a corrosion-resistant concrete tank equipped with a vessel.

  In this case, it is preferable to further include a conductive wire enclosed in a bonding portion between the first corrosion-resistant resin plate and the second corrosion-resistant resin plate.

  In addition, it is preferable that a leak liquid storage section for storing the leak liquid flowing through the leak path and reaching the bottom of the leak path is further provided, and the leak detector is installed in the leak liquid storage section.

  In this case, the concrete frame has a bottom surface, a side surface, and a corner portion where the bottom surface and the side surface intersect, and the first corrosion-resistant resin plate is spaced at the bottom surface and the side surface, and at least one end of the spacing is at the corner portion. The second anticorrosion resin plate is adhered so that the lowermost part of the leak path leads to the corner portion, and the leaked liquid storage portion is made of the anticorrosive concrete by covering the corner portion with the wall surface. The storage liquid and leakage liquid stored in the tank are separated from each other by the wall surface, and a recumbent member whose inside communicates with the lowermost part of the leakage path, and a part of the side surface is covered with the wall surface to store the storage liquid and leakage liquid. Are separated from each other by the wall surface thereof, and the inside thereof communicates with the inside of the recumbent member, and it is preferable to have a vertical reed member that reaches the upper end portion above the liquid level of the stored liquid.

  Further, each of the first anticorrosion resin plates preferably has a rectangular shape and is bonded so that the intervals form a T shape.

  According to the method for producing a corrosion-resistant concrete tank and the corrosion-resistant concrete tank of the present invention, it is possible to prevent leakage liquid from leaking outside the corrosion-resistant concrete tank without almost reducing the content of the corrosion-resistant concrete tank, and to simplify the leakage liquid. A corrosion-resistant concrete tank that can be reliably detected by the structure can be manufactured in a simpler manner.

It is a perspective view which shows the corrosion-resistant concrete tank of embodiment. It is an enlarged view of the part A of FIG. It is a perspective view which shows the concrete tank before corrosion prevention. It is a perspective view which shows the state after performing the lining process by a thermosetting resin to the inner wall of the concrete tank of FIG. It is a perspective view which shows a mode that a thermoplastic resin board is adhere | attached mutually spaced apart to the inner wall of the concrete tank of FIG. It is a perspective view which shows a mode that a thermoplastic resin strip is adhere | attached on the space | interval of the thermoplastic resin board | plate material of FIG. It is a perspective view which shows a mode that a saddle member and a detection tube are adhere | attached on the concrete tank of FIG.

  Hereinafter, with reference to drawings, the manufacturing method of a corrosion-resistant concrete tank and an anti-corrosion concrete tank concerning an embodiment of the present invention are explained in detail. As shown in FIG. 1, the corrosion-resistant concrete tank 1 of the present embodiment includes a concrete casing 10, a thermosetting resin layer 20, a thermoplastic resin plate 30, a thermoplastic resin strip 40, a horizontal gutter member 50, a vertical gutter member 60, and A detection tube 70 is provided. The concrete housing 10 of the corrosion-resistant concrete tank embedded in the ground has a rectangular parallelepiped shape on the inner surface. The concrete housing 10 has a side surface 11, a bottom surface 12, a corner portion 13 where the side surface 11 and the bottom surface 12 intersect, and a corner portion 14 where the side surfaces 11 intersect.

  The thermosetting resin layer 20 is a resin layer having corrosion resistance and thermosetting laminated on the inner surface of the concrete housing 10. As shown in FIG. 2 in which the portion A of FIG. 1 is enlarged, the thermosetting resin layer 20 includes a primer layer 21, a thermosetting resin intermediate coating layer 22, a glass cloth layer 23, a thermosetting resin impregnated coating layer 24, The thermosetting resin topcoat layer 25 and the thermosetting resin finish coat layer 26 are formed. The primer layer 21 is a layer made of a primer applied as a base before applying the thermosetting resin intermediate coating layer 22 or the like.

  The thermosetting resin intermediate coating layer 22 is a layer made of a resin having corrosion resistance and thermosetting applied on the primer layer 21. For the thermosetting resin intermediate coating layer 22, for example, a low-viscosity solventless epoxy resin such as “Polycent E”, trade name of Chuo Corrosion Resistant Co., Ltd. can be used. Polycent E has the characteristics that mechanical strength such as adhesive strength is superior to that of solvent-type epoxy resins while maintaining the adhesiveness and chemical resistance of the epoxy resin, and it is excellent in weak acid resistance and alkali resistance.

The glass cloth layer 23 is a glass fiber cloth affixed on the thermosetting resin intermediate coating layer 22. As the glass fiber forming the glass close layer 23, for example, No. 230 (weight of 230 g per 1 m ² ) can be used. The thermosetting resin impregnated coating layer 24, the thermosetting resin top coating layer 25, and the thermosetting resin finish coating layer 26 are each formed by applying a resin having corrosion resistance and thermosetting on the glass close layer 23. , Stacked layers. As the thermosetting resin-impregnated coating layer 24, the thermosetting resin topcoat layer 25, and the thermosetting resin finish coating layer 26, for example, a low-viscosity solventless epoxy resin such as “Corticate E”, a trade name of Chuo Corrosion Co. Can be used.

  The thermoplastic resin plate 30 is a rectangular resin plate having corrosion resistance and flexibility adhered to the surface of the thermosetting resin layer 20. For the thermoplastic resin plate 30, for example, semi-rigid vinyl chloride such as Chuo Corrosion Co., Ltd. trade name “Centarbon” can be used. Centabones are characterized by having plasticity, low thermal expansion and contraction, and resistance to oxidizing acids, alkali salts and fats and oils.

  As shown in FIG. 2, the thermoplastic resin plate 30 has an interval for forming a leak path 32 between the end faces on the surface of the thermosetting resin layer 20 via the adhesive layer 31. Bonded while. As shown in FIG. 1, on the side surface 11 of the concrete housing 10, each of the rectangular thermoplastic resin plates 30 is aligned and bonded so that the sides extending in the horizontal direction are on the same horizontal line, and a plurality of the horizontal thermoplastic resin plates extend in the horizontal direction. It is glued to form a row. Thereby, the leak path | route 32 formed by the space | interval between the thermoplastic resin boards 30 comprises the several row | line | column extended on the side surface 11 of the concrete housing 10 in a horizontal direction. On the other hand, the rectangular thermoplastic resin plates 30 are bonded so that the sides extending in the vertical direction are not aligned on the same vertical line at least between the adjacent thermoplastic resin plates 30. For this reason, the leak path 32 formed by the space between the thermoplastic resin plates 30 forms a T shape on the side surface 11 of the concrete housing 10. Further, the leak path 32 formed by the space between the thermoplastic resin plates 30 also forms a T shape on the bottom surface 12 of the concrete housing 10.

  As shown in FIG. 2, the thermoplastic resin strip 40 is a strip-shaped resin plate having corrosion resistance and flexibility, which is bonded onto a space between the thermoplastic resin plates 30 and welded by a welding portion 41. . The thermoplastic resin strip 40 can be made of, for example, semi-rigid vinyl chloride such as Chuo Corrosion Co., Ltd. trade name “Centarbon”, similar to the thermoplastic resin plate 30. A space defined by the thermosetting resin layer 20, the end face of the thermoplastic resin plate 30, and the thermoplastic resin strip 40 is a leak path 32. The welded portion 41 is filled with a copper wire 42 for specifying a leakage location by a spark test. The thermoplastic resin strip 40 forming the leak path 32 extending in the vertical direction on the side surface 11 of the concrete housing 10 is bonded to the bottom surface 12 and the corner portion 13 of the concrete housing 10 with a slight gap. Thereby, the lowermost part of the leak path 32 extending in the vertical direction on the side surface 11 of the concrete housing 10 is an opening slightly opened near the bottom surface 12 and the corner portion 13 of the concrete housing 10.

  The recumbent member 50 is a cylindrical member whose circumference is divided into quarters. For the recumbent member 50, for example, a semi-rigid vinyl chloride such as Chuo Corrosion Co., Ltd. trade name “Centarbon” can be used in the same manner as the thermoplastic resin plate 30. The recumbent member 50 covers the corner 13 of the concrete housing 10 with its wall surface. The inside of the recumbent member 50 communicates with the lowermost opening portion of the leak path 32 extending in the vertical direction on the side surface 11 of the concrete housing 10. As a result, the leaked liquid flowing out from the lowermost opening of the leak path 32 is stored in the recumbent member 50. Moreover, the horizontal gutter member 50 covers the corner | angular part 13 of the concrete frame 10 with the wall surface, and separates the stored liquid stored in the corrosion-resistant concrete tank 1 and the leaked liquid which flowed out from the opening part of the leak path | route 32. FIG.

  The vertical rod member 60 is a cylindrical member whose circumference is divided into quarters. For example, semi-rigid vinyl chloride such as Chuo Corrosion Co., Ltd. trade name “Centarbon” can be used for the vertical member 60 similarly to the thermoplastic resin plate 30. The vertical rod member 60 covers the corner portion 14 of the concrete frame 10 with its wall surface. The upper end of the vertical member 60 reaches above the liquid level of the stored liquid in the corrosion-resistant concrete tank 1. The inside of the lower portion of the vertical rod member 60 communicates with the inside of the horizontal rod member 50. As a result, the leakage liquid that has flowed out from the lowermost opening of the leak path 32 through the horizontal reed member 50 is stored in the vertical reed member 60. Further, the vertical rod member 60 covers the corner portion 14 of the concrete frame 10 with its wall surface, thereby separating the stored liquid stored in the corrosion-resistant concrete tank 1 and the leaked liquid flowing out from the opening of the leak path 32. In the present embodiment, the vertical rod member 60 is a cylindrical member whose circumference is divided into quarters and is disposed at the corners 14 between the side surfaces 11 of the concrete frame 10. Is a cylindrical member divided in half, and may be arranged so as to cover the side surface 11 of the concrete housing 10.

  The detection tube 70 is a tubular member disposed in the vertical rod member 60. The lower end portion of the detection tube 70 reaches the lowermost portion of the vertical member 60. A liquid level detection sensor for detecting the liquid level of the leaked liquid stored in the vertical member 60 is provided at the lower end of the detection tube 70. The upper end portion of the detection tube 70 reaches above the upper end portion of the vertical member 60. A signal from the liquid level detection sensor at the lower end of the detection tube 70 is transmitted to the outside of the detection tube 70 via a line arranged in the detection tube 70.

  Hereinafter, the manufacturing method of the corrosion-resistant concrete tank of this embodiment is demonstrated. As shown in FIG. 3, a rectangular parallelepiped concrete casing 10 having a side surface 11, a bottom surface 12, a corner portion 13 where the side surface 11 and the bottom surface 12 intersect, and a corner portion 14 where the side surfaces 11 intersect each other is prepared.

  Next, as shown in FIG. 4, the thermosetting resin layer 20 is formed on the side surface 11 and the bottom surface 12 of the concrete housing 10. In the formation of the thermosetting resin layer 20, a primer is applied to the side surface 11 and the bottom surface 12 of the concrete housing 10 to form the primer layer 21. Next, a low-viscosity solventless epoxy resin having corrosion resistance and thermosetting properties such as Chuo Corrosion Co., Ltd. trade name “Polycent E” is applied on the primer layer 21, and the thermosetting resin intermediate coating layer 22 is formed. It is formed. Next, about 230 glass fibers are affixed on the thermosetting resin intermediate coating layer 22 to form the glass close layer 23. Finally, a low-viscosity non-solvent type epoxy resin such as Chuo Corrosion Co., Ltd. trade name “Polycent E” is applied on the glass cloth layer 23, and the thermosetting resin-impregnated coating layer 24 and the thermosetting resin overcoat are applied. A layer 25 and a thermosetting resin finish coating layer 26 are formed.

  Next, as shown in FIG. 5, a rectangular semi-rigid vinyl chloride having corrosion resistance and flexibility such as “CENTURBON”, a product name of Chuo Corrosion Resistant Co., Ltd. on the side surface 11 and the bottom surface 12 of the concrete housing 10. The plate is bonded via the adhesive layer 31. At this time, the thermoplastic resin plate 30 is bonded to the surface of the thermosetting resin layer 20 via the adhesive layer 31 with an interval for forming a leak path 32 between the end faces. . On the side surface 11 of the concrete housing 10, the rectangular thermoplastic resin plates 30 are bonded so that the sides extending in the horizontal direction are on the same horizontal line, and are bonded so as to form a plurality of rows extending in the horizontal direction. Is done. The leak path 32 forms a plurality of rows extending in the horizontal direction on the side surface 11 of the concrete housing 10. The rectangular thermoplastic resin plates 30 are bonded such that the sides extending in the vertical direction are not aligned on the same vertical line at least between the adjacent thermoplastic resin plates 30. For this reason, the leak path 32 formed by the space between the thermoplastic resin plates 30 forms a T shape on the side surface 11 of the concrete housing 10. Further, the leak path 32 formed by the space between the thermoplastic resin plates 30 also forms a T shape on the bottom surface 12 of the concrete housing 10.

  Note that the thermoplastic resin plate 30 has flexibility and flexibility, such as Chuo Corrosion Co., Ltd. trade name “Centarbon”, so that the concrete housing 10 having a narrow doorway such as a manhole can also be used. The thermoplastic resin plate 30 can be rolled into the inside of the concrete housing 10 and carried in. In addition, the thermoplastic resin plate 30 to be carried into the concrete housing 10 is cut into a rectangular shape having a size standardized in advance according to the dimensions of the concrete housing 10, so that the work in the concrete housing can be performed. It is possible to proceed efficiently.

  Next, as shown in FIG. 6, a thermoplastic resin strip 40 which is a strip plate of semi-rigid vinyl chloride having corrosion resistance and flexibility, such as Chuo Corrosion Co., Ltd. trade name “St. 32 are bonded on the interval between the thermoplastic resin plates 30 forming 32, and are welded by the welding portion 41. A leak path 32 is formed by the space defined by the thermosetting resin layer 20, the end face of the thermoplastic resin plate 30, and the thermoplastic resin strip 40. At this time, the thermoplastic resin strip 40 forming the leak path 32 extending in the vertical direction on the side surface 11 of the concrete housing 10 is bonded to the bottom surface 12 and the corner portion 13 of the concrete housing 10 with a slight space therebetween. Thereby, the lowermost part of the leak path 32 extending in the vertical direction on the side surface 11 of the concrete housing 10 is an opening that is slightly opened near the bottom surface 12 and the corner portion 13 of the concrete housing 10.

  In addition, since the thermoplastic resin strip 40 is an elongate strip-shaped member, even the concrete housing 10 having a narrow entrance such as a manhole can be easily carried into the concrete housing 10. Moreover, the thermoplastic resin strip 40 carried into the concrete housing 10 is cut into a length standardized in advance according to the dimensions of the thermoplastic resin plate 30 so that the work in the concrete housing can be performed. It is possible to proceed efficiently.

  Next, as shown in FIG. 7, the recumbent member 50 is arranged and welded so as to cover the corner portion 13 of the concrete housing 10 with its wall surface. In addition, a detection tube 70 provided with a liquid level detection sensor 71 at the lower end is disposed at the corner 14 of the concrete frame 10. Finally, the vertical rod member is arranged and welded so as to cover the corner portion 14 of the concrete frame and the detection tube 70 with its wall surface.

  Hereinafter, the operation and effect of the corrosion-resistant concrete tank 1 of the present embodiment will be described. In the present embodiment, a thermosetting resin layer 20 having corrosion resistance and thermosetting property is laminated on the inner surface of the concrete casing 10 of the corrosion-resistant concrete tank 1. By laminating the thermosetting resin layer 20 having corrosion resistance, even if the liquid stored in the anticorrosion concrete tank 1 above the thermosetting resin layer 20 leaks, the leaking liquid is caused by the thermosetting resin layer 20. Can be prevented from leaking out of the corrosion-resistant concrete tank 1 by reducing the content of the corrosion-resistant concrete tank 1, which is relatively small. Further, by laminating the thermosetting resin layer 20 having thermosetting properties, it is possible to prevent the thermosetting resin layer 20 from being altered in the subsequent steps.

  Moreover, in this embodiment, on the surface of the thermosetting resin layer 20 laminated | stacked at the anticorrosion resin layer lamination process, the several thermoplastic resin board 30 which has corrosion resistance and a softness | flexibility is mutually spaced between end surfaces. Glue while leaving a gap. In order to adhere the thermoplastic resin plate 30 having corrosion resistance onto the surface of the thermosetting resin layer 20, a corrosion-resistant concrete tank is provided by a double corrosion-resistant layer combined with the thermosetting resin layer 20 thereunder. It is possible to prevent the liquid stored in 1 from leaking out of the corrosion-resistant concrete tank 1. Moreover, since the several thermoplastic resin board 30 which has a softness | flexibility is adhere | attached on the surface of the thermosetting resin layer 20, it can prevent that the thermoplastic resin board 30 cracks. Furthermore, by adhering a plurality of thermoplastic resin plates 30 on the surface of the thermosetting resin layer 20 with a space between the end faces, a leak path 32 that induces leaked liquid in a later step is extremely formed. It can be formed easily.

  Moreover, in this embodiment, the leak path | route 32 divided by the thermoplastic resin strip 40 which has corrosion resistance and a softness | flexibility is formed on the space | interval of each thermoplastic resin board 30. As shown in FIG. Thereby, the leak path | route 32 which guide | induced a leaked liquid can be formed very easily. Moreover, since the thermoplastic resin strip 40 also has corrosion resistance and flexibility like the thermoplastic resin plate 30, the liquid stored in the corrosion-resistant concrete tank 1 is difficult to leak and crack. For this reason, leakage of the liquid stored in the corrosion-resistant concrete tank 1 occurs almost from the welded portion 41 between the thermoplastic resin plate 30 and the thermoplastic resin strip 40. Therefore, the location where the stored liquid stored in the corrosion-resistant concrete tank 1 leaks can be limited, and the leaked liquid is partitioned by the thermosetting resin layer 20, the thermoplastic resin plate 30, and the thermoplastic resin strip 40. It will be naturally guided to the leak path 32.

  Moreover, in this embodiment, the detection pipe 70 and the liquid level detection sensor 71 which detect the leaked liquid which leaked from the corrosion-resistant concrete tank 1 and flowed through the leak path | route 32 are installed in at least one place. Thereby, the leakage of the liquid stored in the corrosion-resistant concrete tank 1 can be reliably detected with a simple structure.

  As described above, according to the present embodiment, leakage of leakage liquid to the outside of the corrosion-resistant concrete tank 1 can be prevented by reducing the internal volume of the corrosion-resistant concrete tank 1, which is relatively small, and the leakage liquid can be reliably secured with a simple structure. The detectable corrosion-resistant concrete tank 1 can be manufactured by a simpler method.

  In addition, when the leakage of the stored liquid from the corrosion-resistant concrete tank 1 is detected by the detection tube 70 and the liquid level detection sensor 71, as described above, the leakage of the liquid stored in the corrosion-resistant concrete tank 1 is almost thermoplastic. It will arise from the welding part 41 of the board 30 and the thermoplastic resin strip 40, and the location where the stored liquid leaks is limited. Therefore, after the stored liquid is once removed from the corrosion-resistant concrete tank 1, a high voltage is applied to each of the copper wires 42 of the welded portion 41, and a spark test is performed in which a spark is generated at the leaked portion, whereby the leaked portion is detected. Identified early. By repairing the specified leaked portion by re-welding or the like, the corrosion-resistant concrete tank 1 in which the leak has occurred can be reused at an early stage.

  Further, in the present embodiment, the recumbent member 50 and the vertical reed member 60 for storing the leaked liquid that flows through the leak path 32 and reaches the lowermost part of the leak path 32 are installed, and the detection tube 70 is installed in the vertical reed member 60. And the liquid level detection sensor 71 is installed. For this reason, since it naturally reaches the lowermost part of the leak path 32 due to gravity and the leaked liquid stored in the recumbent member 50 and the recumbent member 60 is detected by the detection tube 70 and the liquid level detection sensor 71, For example, the pipe 70 and the liquid level detection sensor 71 need only be installed at one position of the vertical shaft member 60, and the installation of the detection pipe 70 and the liquid level detection sensor 71 becomes easy.

  Further, according to the present embodiment, the thermoplastic resin plate 30 is bonded to the concrete housing 10 so that the space is positioned on the bottom surface 12 and the side surface 11 and at least one end of the space is positioned on the corner portion 13. Further, the thermoplastic resin strip 40 is bonded so that the lowermost portion of the leak path 32 communicates with the corner portion 13. Further, by covering the corner portion 13 with the wall surface, the stored liquid stored in the corrosion-resistant concrete tank 1 and the leaked liquid are separated by the wall surface, and the recumbent member 50 whose inside communicates with the lowest part of the leak path 32; By covering the corner portion 14 with the wall surface, the stored liquid and the leaked liquid are separated by the wall surface, the inside communicates with the inside of the recumbent member 50, and the upper end portion is above the liquid level of the stored liquid. A vertical rod member 60 is installed. For this reason, leakage liquid can be stored only by installing the horizontal gutter member 50 in the corner | angular part 13 of the concrete frame 10, and installing the vertical gutter member 60 in the corner | angular part 14 of the concrete frame 10. FIG.

  Further, according to the present embodiment, the thermoplastic resin plates 30 having a rectangular shape are bonded so that the intervals form a T shape. Thereby, it can prevent that the location where space | intervals cross | intersect weakens.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation aspect is possible. For example, in the above-described embodiment, the aspect in which the rust-resistant concrete tank 10 is manufactured by lining the rectangular parallelepiped concrete case 10 is described. However, the corrosion-resistant concrete of the present invention is similarly applied to a cylindrical concrete case. The manufacturing method of a tank is applicable.

  DESCRIPTION OF SYMBOLS 1 ... Corrosion-proof concrete tank, 10 ... Concrete frame, 11 ... Side surface, 12 ... Bottom, 13, 14 ... Corner | angular part, 20 ... Thermosetting resin layer, 21 ... Primer layer, 22 ... Thermosetting resin intermediate coating layer, 23 DESCRIPTION OF SYMBOLS ... Glass cloth layer, 24 ... Thermosetting resin impregnation coating layer, 25 ... Thermosetting resin top coating layer, 26 ... Thermosetting resin finishing coating layer, 30 ... Thermoplastic resin board, 31 ... Adhesive layer, 32 ... Leak Path, 40 ... thermoplastic resin strip, 41 ... weld, 42 ... copper wire, 50 ... recumbent member, 60 ... vertical reed member, 70 ... detection tube, 71 ... liquid level detection sensor.

Claims (10)

The inner surface of the concrete skeleton of corrosion concrete tank, and corrosion resin layer laminating step of laminating the anticorrosive resin layer made of the epoxy resin by applying the epoxy resin having an anti-corrosion and thermoset,
A plurality of first anti-corrosion resin plates made of semi-rigid vinyl chloride having corrosion resistance and flexibility are spaced apart from each other on the surface of the anti-corrosion resin layer laminated in the anti-corrosion resin layer lamination step. A first anticorrosion resin plate bonding step for bonding while
A second anti-corrosion resin plate made of semi-rigid vinyl chloride having corrosion resistance and flexibility is adhered on each interval of the first anti-corrosion resin plates bonded in the anti-corrosion resin plate bonding step, and the anti-corrosion resin layer A second anti-corrosion resin plate bonding step for forming a leak path defined by the end surface of the first anti-corrosion resin plate and the second anti-corrosion resin plate;
A leak detector installation step of installing a leak detector that leaks from the corrosion-resistant concrete tank and detects the leaked liquid flowing through the leak path formed in the second anti-corrosion resin plate bonding step. A method of manufacturing a concrete tank.   2. The method of manufacturing a corrosion-resistant concrete tank according to claim 1, wherein in the second corrosion-resistant resin plate bonding step, a conductive wire is sealed in a bonding portion between the first corrosion-resistant resin plate and the second corrosion-resistant resin plate.   In the leak detector installation step, a leak liquid storage section for storing the leaked liquid that flows through the leak path and reaches the bottom of the leak path is installed, and the leak detector is installed in the leak liquid storage section. The manufacturing method of the corrosion-resistant concrete tank of Claim 1 or 2 installed. In the first anticorrosion resin plate bonding step, the gap is located on the bottom face and the side face with respect to the concrete case having a bottom face, a side face, and a corner where the bottom face and the side face intersect, and the gap Adhering the first anticorrosion resin plate so that at least one end thereof is located at the corner,
In the second anti-corrosion resin plate bonding step, the second anti-corrosion resin plate is bonded so that the lowermost part of the leak path leads to the corner portion,
In the leak detector installation process,
The recumbent member that separates the stored liquid stored in the corrosion-resistant concrete tank and the leaked liquid by the wall surface by covering the corner portion with the wall surface, and the inside of which is in communication with the lowest part of the leak path;
By covering a part of the side surface with the wall surface, the stored liquid and the leaked liquid are separated by the wall surface, and the inside communicates with the inside of the recumbent member, and is higher than the liquid level of the stored liquid. The manufacturing method of the corrosion-resistant concrete tank of Claim 3 which installs the vertical rod member which the upper end part reaches as said leaking liquid storage part.   5. The first corrosion-resistant resin plate bonding step according to claim 1, wherein the first corrosion-resistant resin plates having a rectangular shape are bonded so that the intervals form a T shape. A method of manufacturing a corrosion-resistant concrete tank. A concrete enclosure in a corrosion-resistant concrete tank;
A corrosion-resistant resin layer composed of the epoxy resin laminated by applying an epoxy resin having anti-corrosion and thermosetting properties to the inner surface of the concrete case ;
The adhered on the surface of the anticorrosive resin layer while leaving a space between the end faces of each other, a plurality of first corrosion resin plate made of semi-rigid PVC having corrosion resistance and flexibility,
A second anti-corrosion resin plate made of semi-rigid vinyl chloride having a corrosion resistance and flexibility, which is adhered on the gap between the first anti-corrosion resin plates;
A leak path defined by the corrosion-resistant resin layer, the end surface of the first corrosion-resistant resin plate, and the second corrosion-resistant resin plate;
A corrosion detector comprising: a leak detector that leaks from the corrosion-resistant concrete tank and detects leaked liquid that has flowed through the leak path in at least one place.   The corrosion-resistant concrete tank according to claim 6, further comprising a conductive wire sealed in a bonding portion between the first corrosion-resistant resin plate and the second corrosion-resistant resin plate.   The leak detector is further provided in the leaked liquid storage part, further comprising a leaked liquid storage part for storing the leaked liquid flowing through the leak path and reaching the lowermost part of the leak path. Or the corrosion-resistant concrete tank of 7. The concrete frame has a bottom surface, a side surface, and a corner where the bottom surface and the side surface intersect,
The first corrosion-resistant resin plate is bonded so that the gap is located on the bottom surface and the side surface, and at least one end of the gap is located at the corner,
The second anticorrosion resin plate is bonded so that the lowermost portion of the leak path leads to the corner portion,
The leaked liquid reservoir is
The recumbent member that separates the stored liquid stored in the corrosion-resistant concrete tank and the leaked liquid by the wall surface by covering the corner portion with the wall surface, and the inside of which is in communication with the lowest part of the leak path;
By covering a part of the side surface with the wall surface, the stored liquid and the leaked liquid are separated by the wall surface, and the inside communicates with the inside of the recumbent member, and is higher than the liquid level of the stored liquid. The corrosion-resistant concrete tank according to claim 8, comprising a vertical rod member that reaches an upper end portion thereof.   10. The corrosion-resistant concrete tank according to claim 6, wherein each of the first corrosion-resistant resin plates has a rectangular shape, and is bonded so that the intervals form a T-shape.

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