JP5174856B2 - How to install a thermal resistance mitigation material for a levee-integrated cryogenic tank - Google Patents

Description

  The present invention relates to a method for installing a thermal resistance mitigation material for a breakwater-integrated cryogenic tank.

  Conventionally, the PC breakwater of a PC (prestressed concrete) breakwater integrated cryogenic tank that stores low-temperature objects (gas and liquid) such as liquefied natural gas and liquefied petroleum gas has a cylindrical shape, and the outer surface of the PC breakwater is outside. A tank liner plate is attached. The cooling resistance reducing material provided inside the outer tank liner plate is formed as follows.

  (1) A heat insulating panel made of hard urethane foam or the like is temporarily fixed with a space on the inner wall surface of the outer tub that has been subjected to surface treatment for improving adhesion, such as sandblasting and then primer application. Inject the foamed stock solution of rigid urethane foam into the space formed by the inner wall surface (curved surface) of the outer tub and the heat insulation panel (planar surface). Sticks to the inner wall.

  The space between the inner wall of the outer tank and the heat insulation panel is filled with rigid urethane foam. This is because there is a possibility that the thermal insulation panel will bend and deform and be damaged.

  (2) A hard urethane foam foam solution is sprayed and solidified by manual or automatic means on the surface of the inner surface of the outer tub that has been surface-treated. Form urethane foam. Next, the surface is cut using an appropriate means to form a hard urethane foam heat insulating layer having a predetermined thickness. And the surface layer which consists of a glass fiber reinforced urethane resin which integrated the glass cloth using the urethane type adhesive agent in the hard urethane foam heat insulation layer is formed.

  (3) A rigid urethane foam foaming stock solution is sprayed on the back side surface of the surface material which is provided with a space along the inner wall surface of the outer tank. While the hard urethane foam undiluted solution has a self-adhesive force, it is pressed against the inner wall surface of the outer tank and foamed and solidified, and the surface material is integrated in one step, and the hard urethane foam heat insulating layer fixed to the inner wall surface of the outer tank is formed.

However, when a heat insulating panel is used as in (1), it is difficult to check the filling state of the rigid urethane foam formed by in-situ foaming, and there is a high possibility that a defect in quality will be incorporated. In addition, the thickness of the rigid urethane foam heat insulating material cannot be ensured and formed unless measures against a large foaming pressure of 5 ton / m ² or more generated at the time of pouring and foaming are not implemented. Serious defects such as cracks occur inside rigid urethane foam. For this reason, a large measure against foaming pressure is required, the working efficiency is poor, the on-site expenses are increased, and the construction period is prolonged.

  (2) As in (3), the foamed stock solution of rigid urethane foam is sprayed and solidified to form a solid foam. This requires expensive and large-scale equipment for mist countermeasures and construction of the foamed stock solution generated during spraying. Expenses and construction period become enormous.

  The thermal resistance relaxation materials of (1), (2), and (3) are integrally solidified on the inner wall surface of the outer tub at the site using the self-adhesive force at the time of foaming of the rigid urethane foam. The formation reaction of the rigid urethane foam is an exothermic reaction and is formed at a high temperature. The rigid urethane foam is bonded to the inner wall surface of the outer tub, the heat insulating panel, and the surface material by self-adhesive force.

  As a result, when the thermal resistance relaxation material returns to room temperature, thermal stress is generated and remains inside. Further, thermal stress is further generated by being exposed to a low temperature during storage of low-temperature objects (gas and liquid). For this reason, there is always a possibility of peeling from the inner wall surface of the outer tub or rupture of the rigid urethane foam.

  Moreover, the function of a thermal resistance relaxation material may also lose | disappear by the adhesion failure which exists locally at the time of construction. In order to eliminate these, large-scale equipment is required for maintaining and managing construction environment conditions such as allowable temperature and humidity. Since it takes a long time to carry in, install and remove them at the construction site, the construction period becomes longer and the site costs increase.

JP-A-10-252169

  The present invention has been made in view of such problems, and the object of the present invention is to provide a breakwater that is easy to quality control during construction, can be efficiently formed in a short period of time, and has no performance defects. An object of the present invention is to provide a method for installing a thermal resistance mitigation material for an integrated low temperature tank and a breakwater integrated low temperature tank.

A first invention for achieving the above-mentioned object is a liquid-breakwater-integrated cryogenic tank having a bottom plate and a liquid breakwater, and having a liner plate and an inner tank inside the bottom plate and the liquid breakwater, Fixing a plurality of heat insulation panels to the liner plate by using a fixing means, and filling a joint between adjacent heat insulation panels with a filler, a method for installing a thermal resistance relaxation material for a breakwater-integrated cryogenic tank, The heat insulating panel has a surface material on the surface of the heat insulating material, provided with a bolt hole penetrating the cross section, and the liner plate is provided with a heat insulating bolt whose exposed length is longer than the thickness of the heat insulating panel. The heat insulation bolt is inserted into the bolt hole, a washer having an injection hole is sandwiched, the heat insulation panel is tightened with a nut, and the heat insulation panel is fixed to the liner plate, from the injection hole to the bolt hole. Filled by injecting Hamazai, the heat insulating bolt, provided a fluid-tight material so as to cover the nut and the washer, the liquid Mitsuzai has the same material as the surface material, a glass fiber and a low temperature adhesion An FRP is formed by hand laying up using an agent, and is provided by being integrated with the surface material .

  ADVANTAGE OF THE INVENTION According to this invention, the quality control at the time of construction is easy, can be formed efficiently in a short period, and the installation method of the thermal-resistance resistance relaxation material of a breakwater integrated low temperature tank without a defect in performance can be provided.

The perspective view of the heat insulation panel 1 AA sectional view of FIG. The perspective view which shows a part of the breakwater 13 which installed the heat insulation panel 1 The perspective view which shows a part of the breakwater 13 which installed the thermal-resistance resistance relaxation material 23 BB sectional view of FIG. Sectional drawing of the heat insulation panel 1a fixed to the breakwater 13 using the hook 26 Sectional view of the breakwater 13 provided with eyelet fittings 28 Sectional drawing of the heat insulation panel 1b fixed to the breakwater 13 using the eyelet fitting 28 Cross section of the heat insulation panel 1c fixed to the breakwater 13 using heat insulation bolts Cross section of the breakwater integrated cryogenic tank 43 Perspective view of heat insulation panel 45 Sectional drawing of the vicinity of the part where the overhanging portion 53 of the two heat insulation panels 45 is abutted Perspective view of the vicinity of the engaging step between the heat insulation panel 45a and the heat insulation panel 45b Sectional drawing of the heat insulation panel 45a and the heat insulation panel 45b installed in the breakwater 13 Plan view of heat insulation panel 45c Part of the horizontal cross-sectional view of the breakwater 13 with a heat insulation panel 65 whose back side is flat Cross section of the breakwater-integrated cryogenic tank 71 Perspective view showing a part of the breakwater 73 A part of CC sectional view of FIG. Sectional drawing of the heat insulation panel 89 fixed to the breakwater 73 (DD sectional drawing of FIG. 18)

  Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of the heat insulation panel 1, and FIG. 2 is a cross-sectional view taken along line AA of FIG. As shown in FIG. 1, the heat insulation panel 1 uses a rectangular plate-like heat insulating material 3 as a core material, and a front surface material 5 and a back surface material 7 are previously integrated on the front and back of the heat insulating material 3 by factory processing. It is curved with the back material 7 side as the outside.

  As the heat insulating material 3, a hard heat insulating material that is excellent in heat insulating properties and liquid-tight is preferably used. For example, foamed plastics such as rigid urethane foam and polyisocyanurate foam.

  The surface material 5 is a material having liquid-tightness against a low-temperature liquefied gas. For example, FRP having low temperature resistance such as glass fiber reinforced urethane resin, metal foil such as aluminum foil, composite material of woven or non-woven fabric made of metal foil and organic or inorganic fiber material, composite material of metal foil and plastic film, Wood boards such as plywood are used.

The back surface material 7 is a plate-shaped material such as a metal plate, FRP plate, or plywood having a thickness of about 1 to 5 mm.
As shown in FIGS. 1 and 2, the surface material 5 and the heat insulating material 3 are provided with four circular holes 9 penetrating the cross section. Further, a circular anchor hole 11 is provided in the back material 7 in accordance with the position of the hole 9.

  FIG. 3 is a perspective view showing a part of the breakwater 13 provided with the heat insulation panel 1. The breakwater 13 is a cylindrical PC member. A liner plate 15 is installed on the inner wall surface of the breakwater 13. A plurality of heat insulating panels 1 are arranged on the inner wall surface of the liner plate 15 so that the back material 7 is in close contact with the liner plate 15. Joints 17 are formed between the adjacent heat insulating panels 1 in the circumferential direction and the vertical direction of the liner plate 15.

  FIG. 4 is a perspective view showing a part of the breakwater 13 provided with the cooling resistance reducing material 23. FIG. 5 is an enlarged cross-sectional view taken along the line BB in FIG. 4 and shows the vicinity of adjacent portions of the two heat insulation panels 1. As shown in FIG. 5, anchor bolts 25 are studded on the liner plate 15 on the inner wall surface of the breakwater 13 at positions corresponding to the anchor holes 11 of the back surface material 7 of the heat insulation panel 1. The exposed length of the anchor bolt 25 is shorter than the thickness of the heat insulating panel 1.

  The anchor bolt 25 is inserted into the anchor hole 11 of the back surface material 7 of the heat insulating panel 1. Then, the back material 7 is fastened with the nut 27, and the heat insulating panel 1 is fixed to the liner plate 15. The back material 7 is a member for attaching the heat insulating panel 1 to the liner plate 15 through the anchor holes 11.

  As shown in FIGS. 4 and 5, the filler 19 is filled in the joints 17 between the adjacent heat insulating panels 1, and the filler 21 is filled in the holes 9 of the heat insulating panels 1. The filler 19 is an adhesive filler, for example, a reactive foam adhesive made of a thermosetting resin such as polyurethane, an in-situ foamable foamed plastic such as a rigid urethane foam, or a foamed plastic such as a hard urethane foam previously foam-molded. Is used. The filler 21 is a molded heat insulating material or an adhesive filler.

The foaming stock solution of the adhesive filler is applied to the side surface of the heat insulation panel 1 or poured into the joint 17 of the heat insulation panel 1 to be solidified by foaming and integrated with the side surface of the heat insulation panel 1 and the surface of the liner plate 15. Thereby, the joint 17 and the hole 9 are completely filled.
Further, the joint material 17 may be filled with a surface material.

  Further, a belt-like liquid-tight material 29 is installed so as to cover the surface of the filler 19 filled with the joint 17. At the same time, a liquid-tight material 31 such as a disk shape is installed so as to cover the surface of the filler 21 filled with the holes 9, thereby forming the cooling resistance reducing material 23. The cooling resistance reducing material 23 includes a plurality of heat insulating panels 1, a filler 19, a filler 21, a liquid-tight material 29, a liquid-tight material 31 and the like.

  The liquid-tight material 29 and the liquid-tight material 31 are made of the same material as the surface material 5 of the heat insulating panel 1. The liquid-tight material 29 and the liquid-tight material 31 are bonded to the surface material 5 using, for example, a low-temperature adhesive such as urethane. Alternatively, an FRP is formed by fiber laying such as glass fiber by hand layup using a low temperature adhesive, and is integrally bonded to the surface material 5.

  In the cooling resistance reducing material 23, the anchor bolt 25 is embedded with the filler 21, so that formation of a heat bridge can be avoided. In addition, by bonding the liquid-tight material 29 and the liquid-tight material 31 to the surface material 5 of the heat insulation panel 1, a complete liquid-tight surface layer is formed on the surface of the thermal resistance reducing material 23.

  Next, a modified example will be described. FIG. 6 is a cross-sectional view of the heat insulating panel 1 a fixed to the liquid breakwater 13 using the hook 26. The heat insulating panel 1a is obtained by integrating the front surface material 5a and the back surface material 7a on the front and back of the heat insulating material 3a by factory processing, and is the same material as the heat insulating panel 1. In addition, a circular hole 12 is provided in the back surface material 7a in accordance with the position of the hole 9a penetrating the surface material 5a and the heat insulating material 3a.

  A hook 26 is provided on the liner plate 15 on the inner wall surface of the liquid barrier 13 at a position corresponding to the hole 12 of the back surface material 7a of the heat insulating panel 1a. The hook 26 is attached to the liner plate 15 by welding, for example. The hook 26 is inserted into the hole 12 of the back surface material 7 a of the heat insulating panel 1 a and hooked to fix the heat insulating panel 1 a to the liner plate 15. The back surface material 7 a is a member for attaching the heat insulating panel 1 a to the liner plate 15 with the hook 26.

  Similar to the installation of the heat insulating panel 1 shown in FIG. 5, the hole 9 a and the hole 12 of the heat insulating panel 1 a are filled with the filler 21, and a liquid-tight material 31 such as a disk is formed so as to cover the surface of the filler 21. Install. Further, the filler 17 is filled in the joints 17 of the adjacent heat insulating panels 1 a, and the filler 19 is covered with the liquid-tight material 29 to form the cooling resistance reducing material 23. The cooling resistance reducing material 23 includes a plurality of heat insulating panels 1a, a filler 19, a filler 21, a liquid-tight material 29, a liquid-tight material 31, and the like.

  Still another modification will be described. FIG. 7 is a cross-sectional view of the breakwater 13 provided with the eyelet fitting 28, and FIG. 8 is a cross-sectional view of the heat insulation panel 1 b fixed to the breakwater 13 using the eyelet fitting 28. As shown in FIG. 7, on the liner plate 15 on the inner wall surface of the breakwater 13, a cylindrical grommet with a tip divided into several portions at a position corresponding to the hole 12 of the back surface material 7 b of the heat insulating panel 1 b. 28 is provided. The eyelet fitting 28 is attached to the liner plate 15 by welding, for example.

  As shown in FIG. 8, the eyelet fitting 28 is inserted into the hole 12 of the back surface material 7b of the heat insulation panel 1b, the tip of the eyelet fitting 28 is bent outside the hole 12 and pressed against the back surface material 7b, and the heat insulation panel 1b is lined. Fix to plate 15. The back material 7 b is a member for attaching the heat insulation panel 1 b to the liner plate 15 with the eyelet fitting 28.

  The hole 9b and the hole 12 of the heat insulating panel 1b are filled with the filler 21, and a disc-like liquid-tight material 31 is installed so as to cover the surface of the filler 21. Further, the filler 17 is filled into the joint 17 of the adjacent heat insulating panel 1b, and the filler 19 is covered with the liquid-tight material 29 to form the cooling resistance reducing material 23. The cooling resistance reducing material 23 includes a plurality of heat insulating panels 1b, a filler 19, a filler 21, a liquid-tight material 29, a liquid-tight material 31, and the like.

  Next, another modification will be described. FIG. 9 is a cross-sectional view of the heat insulation panel 1 c fixed to the liquid breakwater 13 using the heat insulation bolt 99. The heat insulating panel 1 c has a surface material 5 c on the surface of the heat insulating material 3 c and is the same material as the heat insulating panel 1. The heat insulation panel 1c is provided with a circular bolt hole 97 that penetrates the cross section.

The liner plate 15 has heat insulation bolts 99 fixed at positions corresponding to the bolt holes 97 of the heat insulation panel 1c. The heat insulation bolt 99 is made of non-metal such as resin, and is attached to the liner plate 15 by adhesion, heat fusion or the like, and its exposed length is longer than the thickness of the heat insulation panel 1c.
Alternatively, a heat insulating bolt 99 may be fixed to the liner plate 15 by welding a nut to the liner plate 15 and screwing the heat insulating bolt 99 into the nut.
Then, the heat insulating bolt 99 is inserted into the bolt hole 97 of the panel 1 c, the heat insulating panel 1 c is tightened with the nut 103 with the washer 101 interposed therebetween, and the heat insulating panel 1 c is fixed to the liner plate 15.

  The washer 101 has an injection hole 105. The filler 21 is injected from the injection hole 105 and the bolt hole 97 is filled. For example, the filling material 21 is filled with foaming plastic stock solution from a filling hole 105 to be foamed and filled. And the liquid-tight material 31 is integrated and installed with the surface material 5c so that the heat insulation bolt 99, the washer 101, and the nut 103 may be coat | covered.

  FIG. 10 is a cross-sectional view of the breakwater-integrated cryogenic tank 43. The breakwater 13 is constructed on the outer periphery of a disk-shaped bottom slab 35 formed on the ground surface 33, and the procedure shown in FIGS. 1 to 9 is provided inside the liner plate 15 installed on the inner wall surface of the breakwater 13. And the thermal resistance relaxation material 23 is installed by the method.

  An inner tank 39 is provided inside the outer tank 37 in which the liquid barrier 13, the liner plate 15, and the cooling resistance reducing material 23 are integrated, and a cold insulating material 41 is provided between the outer tank 37 and the inner tank 39. Filled, a liquid barrier integrated cryogenic tank 43 is constructed. The cold insulator 41 is, for example, pearlite powder.

As described above, according to the first embodiment, the anchor bolt 25 of the liner plate 15 is inserted into the anchor hole 11 of the heat insulating panel 1, or the hook 26 or the eyelet fitting 28 of the liner plate 15 is inserted into the heat insulating panel 1a. By inserting the heat insulation bolt 99 into the hole 12 of the heat insulation panel 1b or the bolt hole 97 of the heat insulation panel 1c and fixing the heat insulation panel to the liner plate 15, the amount of foaming at the site is greatly reduced and large foaming is required. Easy installation with no equipment required.
In addition, it is possible to prevent the thermal resistance reducing material 23 from being detached from the liner plate 15 when using the breakwater integrated low-temperature tank 43 and in the event of leakage.

  Next, a second embodiment will be described. FIG. 11 is a perspective view of the heat insulation panel 45. The heat insulation panel 45 corresponds to the heat insulation panel 1 of the first embodiment. The heat insulating panel 45 is obtained by integrating the front surface material 49 and the back surface material 51 in advance by factory processing on the front and back of the rectangular plate-shaped heat insulating material 47, and is curved with the back surface material 51 side as the outside.

  Two opposite sides of the back material 51 protrude from the heat insulating material 47 and the surface material 49, and the protruding portion 53 is provided with a substantially semicircular cutout portion 55. The heat insulating material 47, the surface material 49, and the back surface material 51 are the same materials as the heat insulating material 3, the surface material 5, and the back surface material 7, respectively, of the first embodiment.

  The heat insulation panel 45 is installed along the liner plate 15 on the inner wall surface of the liquid barrier 13 like the heat insulation panel 1 shown in FIG. FIG. 12 is a cross-sectional view of the vicinity of a portion where the projecting portions 53 of the two heat insulating panels 45 are abutted. Anchor bolts 57 are studded on the liner plate 15 at positions corresponding to the notches 55 of the heat insulating panel 45. The exposed length of the anchor bolt 57 is shorter than the thickness of the heat insulating panel 45.

  The heat insulating panel 45 is installed so that the back material 51 is in close contact with the liner plate 15. At that time, the protruding portions 53 of the two adjacent heat insulating panels 45 are abutted, and the anchor bolts 57 are sandwiched by the notch portions 55 facing each other. Then, the projecting portion 53 of the adjacent heat insulation panel 45 is simultaneously tightened with the nut 59, and the adjacent heat insulation panel 45 is fixed to the liner plate 15. Thus, the adjacent heat insulation panels 45 are fixed by sharing the anchor bolts 57.

  The portion where the projecting portion 53 of the adjacent heat insulating panel 45 is abutted is filled with the filler 61, and the belt-like liquid-tight material 63 is bonded to the surface material 49 so as to cover the filler 61. Further, the filler between the two sides where the overhanging portion 53 of the adjacent heat insulating panel 45 does not exist is filled with a filler, and a belt-like liquid-tight material is adhered to the surface material 49 so as to cover the filler, The thermal resistance relaxation material 23 is formed.

  Next, a modified example will be described. FIG. 13 is a perspective view of the vicinity of a portion where the projecting portions 53a and 53b of the heat insulation panel 45a and the heat insulation panel 45b are engaged, and FIG. 14 is a cross-sectional view of the heat insulation panel 45a and the heat insulation panel 45b installed on the liquid barrier 13. . The heat insulation panel 45a and the heat insulation panel 45b are obtained by integrating the surface material 49a and the surface material 49b on the surfaces of the heat insulation material 47a and the heat insulation material 47b, respectively, and the back surface material 51a and the back surface material 51b on the back surface by factory processing. The material is the same as that of the panel 45.

  Two opposite sides of the back material 51a protrude from the heat insulating material 47a and the surface material 49a, and an engaging step portion 54a is provided on the surface side of the protruding portion 53a, that is, on the heat insulating material 47a side. Two opposite sides of the back surface material 51b protrude from the heat insulating material 47b and the surface material 49b, and an engagement step portion 54b is provided on the back surface side of the overhang portion 53b.

  The overhang part 53 a and the overhang part 53 b each have a circular hole 56. The engagement step portion 54a and the engagement step portion 54b are overlapped so that the positions of the hole 56 of the overhang portion 53a and the hole 56 of the overhang portion 53b coincide with each other, and an anchor bolt 57 is inserted into the hole 56 as shown in FIG. To do.

  And the heat insulation panel 45a and the overhang | projection part 53b and the overhang | projection part 53b of the heat insulation panel 45b which are adjacent with the nut 59 are clamp | tightened simultaneously, and the heat insulation panel 45a and the heat insulation panel 45b are fixed to the liner plate 15. Thus, the adjacent heat insulation panel 45a and the heat insulation panel 45b are fixed by sharing the anchor bolt 57.

  A portion of the heat insulation panel 45a and the heat insulation panel 45b overlaid with the overhanging portion 53a and the overhanging portion 53b is filled with the filler 61, and the belt-like liquid-tight material 63 is covered with the surface material 49a and the surface so as to cover the filler 61 Adhere to the material 49b. Furthermore, the filler between the two sides where there is no overhanging part of the adjacent insulation panel is also filled with a filler, and a belt-like liquid-tight material is adhered to the surface material so as to cover the filler, thereby reducing the thermal resistance. A material 23 is formed.

  The filling material 61 and the liquid-tight material 63 of FIG. 12 and FIG. 14 and the filling material and the liquid-tight material of the joint portion are the filling material 21 and the liquid-tight material 31 of the first embodiment, and the filling material 19 and the liquid-tight material, respectively. The same material as the material 29 is used. The cooling resistance reducing material 23 includes a plurality of heat insulating panels, a filler 61, a liquid-tight material 63, and the like.

  FIG. 15 is a plan view of the heat insulation panel 45c. The heat insulation panel 45c has a protruding portion 53c on two adjacent sides, and the protruding portion 53c is provided with a rectangular cutout portion 55c. In this way, the overhanging portion may be provided on any side instead of the two sides facing each other. Further, the shape of the notch portion may be not only a semicircular shape like the heat insulating panel 45 of FIG. Similarly to the notch, the shape of the anchor hole 11 of the back surface material 7, the hole 12 of the back surface materials 7a and 7b, the bolt hole 97 of the heat insulation panel 1c, and the holes 56 of the overhang portions 53a and 53b of the heat insulation panels 45a and 45b It is not limited to a circle.

  In the moderating material 23 of the second embodiment, the anchor bolt 57 is embedded with the filler 61, so that formation of a heat bridge can be avoided. Further, by adhering the liquid-tight material 63 to the surface material 49 of the heat insulating panel 45, a complete liquid-tight surface layer is formed on the surface of the thermal resistance reducing material 23.

  Further, the anchor bolt 57 of the liner plate 15 is inserted into the notch 55 of the adjacent heat insulating panel 45 or inserted into the holes 56 of the adjacent heat insulating panels 45a and 45b so that the heat insulating panel is attached to the liner plate 15. By fixing, the amount of local foaming is greatly reduced, and the local process can be shortened and a large-scale foaming device is not required and can be installed easily. Further, it is possible to prevent the thermal resistance relaxation material 23 from being detached from the liner plate 15 when the low temperature tank is used and in the unlikely event of leakage.

  In addition, although the example of the anchor bolt was shown as a fixing means of a heat insulation panel, a fixing means is not limited to this. In the first and second embodiments, the heat insulating panel 1 and the heat insulating panel 45 curved outward with the back surface material 7 side and the back material 51 side as the outside are used, but the shape of the heat insulation panel is limited to this. It is not something.

  Still another modification will be described. FIG. 16 is a part of a horizontal cross-sectional view of the breakwater 13 in which a heat insulating panel 65 having a flat back surface is installed. The heat insulating panel 65 has the same structure and material as the heat insulating panel 1, the heat insulating panel 45, etc., but is not curved and has a flat plate shape. Adhesive filler 67 is filled in joints of adjacent heat insulation panels 65, and a liquid-tight material 69 is provided so as to cover the filler 67.

  In this way, even if a space is generated between the back surface material (not shown) of the heat insulating panel 65 and the liner plate 15, the space is isolated for each heat insulating panel 65. By taking into consideration the size and strength of the heat insulation panel 65 in accordance with the support span of the heat insulation panel 65 and selecting as appropriate, the heat insulation panel 65 having a flat back surface can be used.

  Next, a third embodiment will be described. 17 is a cross-sectional view of the breakwater-integrated cryogenic tank 71, FIG. 18 is a perspective view showing a part of the breakwater 73, and FIG. 19 is a portion of the CC cross-sectional view of FIG. FIG. 20 is a cross-sectional view taken along the line DD of FIG. 18, and shows an enlarged vicinity of adjacent portions of the two heat insulating panels 89. As shown in FIG. 17, a disk-shaped bottom plate 79 is constructed on the ground surface 81, and a liquid breakwater 73 is constructed on the outer periphery of the bottom plate 79.

  As shown in FIGS. 18 and 19, the liquid breakwater 73 is a cylindrical PC member having a cross section in which the outer side is circular and the inner side is polygonal. A plurality of flat liner plates 75 are installed along the inner wall surface of the breakwater 73. A strip-shaped liner plate backing metal 91 is installed outside the joined portion of the flat liner plate 75. The liner plate backing metal 91 fixes adjacent liner plates 75 along polygonal polygonal lines on the inner wall surface of the liquid barrier 73.

Then, a plurality of plate-like heat insulation panels 89 are fixed so as to be in close contact with the inner surface of the liner plate 75.
As shown in FIG. 20, the heat insulation panel 89 is installed on the liner plate 75 in the same manner as that shown in FIG.

  As shown in FIG. 18, joints 93 are formed vertically and horizontally between adjacent heat insulating panels 89. As shown in FIG. 19, the filler 93 is filled in the joint 93. The filler 95 is made of the same material as the filler 19 of the first embodiment. For example, a foaming stock solution such as rigid urethane foam is injected into the joint 93 to foam and solidify.

  Further, a liquid-tight material 94 is provided so as to cover the filler 95, and the adjacent heat insulating panels 89 are integrated to form the cooling resistance reducing material 77. The cooling resistance reducing material 77 is composed of a plurality of heat insulating panels 89, a filler 93, a liquid honey material 94, and the like.

  Further, an outer tub 83 in which the liquid breakwater 73, the liner plate 75, and the thermal resistance relaxation material 77 are integrated is formed, an inner tub 85 is formed inside the outer tub 83, and the outer tub 83 and the inner tub 85 are formed. A cold insulation material 87 is filled in between, and the breakwater-integrated cryogenic tank 71 is completed. The cold insulating material 87 is, for example, pearlite powder.

  As described above, in the third embodiment, since the inner wall surface of the liquid breakwater 73 is polygonal, it is not necessary to bend the liner plate 75, and the liner plate 75 and the heat insulating panel 89 are in contact with each other in a plane. Therefore, quality control at the time of construction of the cooling resistance reducing material 77 becomes easy, and the cooling resistance reducing material 77 can be installed economically in a short period of time. In addition, since the liner plate 75 and the heat insulating panel 89 are in close contact with each other, the thermal resistance reducing material 77 is not damaged even if the hydraulic pressure acts when the liquid-proof-bank integrated low-temperature tank 71 is used or in the event of leakage.

  In the third embodiment, in place of the heat insulation panel 89, the heat insulation panel 1 of the first embodiment, the heat insulation panel 45 of the second embodiment, or the like made into a flat plate is used. These heat insulation panels can be fixed to the liner plate 75 using bolts, nuts, hooks, eyelet fittings, etc., and a cooling resistance reducing material 77 can be formed by providing a filler and a liquid-tight material.

  In any embodiment, circular anchor holes, holes, or notches are provided at four locations on one panel. However, the positions, number, and shapes of the anchor holes, holes, and notches are not limited to this. Not. Moreover, the shape of the heat insulation panel is not rectangular but may be other polygons.

1, 1a, 1b, 1c, 45, 45a, 45b, 45c, 65, 89 ......... Insulation panel 3, 3a, 3b, 3c, 47, 47a, 47b, 92 ......... Insulation material 5, 5a, 5b, 5c, 49, 49a, 49b, 90 ......... Surface material 7, 7a, 7b, 51, 51a, 51b ...... Back material 11 ......... Anchor hole 12, 56 ......... Hole 13, 73 ......... Prevention Liquid bank 15, 75 ……… Liner plate 17, 93 ……… Joint 19, 21, 61, 67, 95 ……… Filling material 23, 77 ……… Cool resistance mitigation material 25, 57 ……… Anchor bolt 26 ……… Hook 28 ……… Grommet 29, 31, 63, 69, 94 ……… Liquid-tight material 43, 71 ……… Liquid dam integrated cryogenic tank 53, 53a, 53b, 53c ……… Overhang 54a, 54b ......... engagement step 55, 55c ... Notch 97 ......... bolt hole 99 ......... insulation volts

Claims (2)

In a cryogenic tank integrated with a liquid bank, having a bottom plate and a liquid bank, and a liner plate and an inner tank are provided inside the bottom plate and the liquid bank, a plurality of heat insulating panels are fixed to the liner plate using a fixing means. It is a method of installing a thermal resistance mitigation material for a breakwater-integrated cryogenic tank that fixes and fills joints between adjacent insulation panels with a filler,
The heat insulating panel has a surface material on the surface of the heat insulating material, provided with a bolt hole penetrating the cross section,
The liner plate is provided with heat insulating bolts whose exposed length is longer than the thickness of the heat insulating panel,
Insert the heat insulation bolt into the bolt hole, sandwich a washer having an injection hole, tighten the heat insulation panel with a nut, and fix the heat insulation panel to the liner plate,
Fill and fill the bolt hole from the injection hole,
A liquid-tight material is provided so as to cover the heat insulation bolt, the nut and the washer,
The liquid-tight material is the same material as the surface material, and the FRP is formed by hand layup using glass fiber and a low-temperature adhesive, and is provided integrally with the surface material. How to install a thermal resistance mitigation material for a breakwater integrated low-temperature tank. The liquid-tight material and the surface material are glass fiber reinforced urethane resins having low temperature resistance,
2. The method of installing a cooling resistance reducing material for a breakwater-integrated cryogenic tank according to claim 1, wherein the filling material is a foaming stock solution of foamed plastic, and the filling material is foamed and filled after being injected from the injection hole.

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