KR20110031613A - Heat insulation structure and cryogenic liquid storage tank having the same - Google Patents

Abstract

PURPOSE: An insulation structure and a cryogenic liquid storage tank with the same are provided to improve the reliability and thermal insulating function of product by increasing the resistivity against the pressure of the cryogenic liquid. CONSTITUTION: An insulation structure comprises an outer insulation layer(120), an inner insulation layer(140), and a main barrier wall(160). The outer insulation layer is located on the inside wall of a tank in order to cover the inside wall of the tank. A plurality of outer heat-insulating panels(121), which has an inner space made of composite material is formed in the outer insulation layer. The inner insulation layer is installed in the outer insulation layer in order to cover the outer insulation layer. A plurality of inner heat-insulating panels(141), which has an inner space made of composite material is formed in the inner insulation layer. The main barrier wall is located on the top of the inner insulation layer in order to prevent the inflow of cryogenic liquid into the inner insulation layer. A plurality of corrugation part(161) protruding towards the inner insulation layer is form in the main barrier wall.

Description

Heat-insulating structure and cryogenic liquid storage tank having the same {HEAT INSULATION STRUCTURE AND CRYOGENIC LIQUID STORAGE TANK HAVING THE SAME}

The present invention relates to a cryogenic liquid storage tank, and more particularly to an insulating structure for insulating the storage space in which the cryogenic liquid is stored, and a cryogenic liquid storage tank having the same.

Cryogenic liquids, such as LNG, Liquid Argon (LAR), Liquid Nitrogen (LIN), Liquid Oxygen (LOX), and Liquid Hydrogen (LH2), are stored in insulated storage tanks to minimize liquid loss by evaporation. Stored or transported in stored condition.

As an example of such a cryogenic liquid storage tank, the storage tank for liquefied natural gas is for storing the cryogenic liquefied natural gas of about -165 ℃, there are spherical type (Spherical Type) and membrane type (Membrane Type). Membrane type liquefied natural gas storage tank is the most widely used because of its larger loading capacity and simpler manufacturing than the spherical type liquefied natural gas storage tank. Membrane type liquefied natural gas storage tanks include MARK-III type and NO-96 type developed by Gaz Transport et Technigaz (GTT), France. These liquefied natural gas storage tanks have a heat insulating structure for preventing the leakage of liquefied natural gas and insulating the storage space in which the liquefied natural gas is stored. Among the MARK-III and NO-96 types, the Mark-III liquefied natural gas storage tank is preferred to the NO-96 type because of its ease of construction and low material cost.

The insulation structure of the MARK-III type liquefied natural gas storage tank includes a kitchen wall whose surface is in direct contact with the cryogenic liquefied natural gas, and an insulation panel coupled to the outer surface of the kitchen wall. The insulation panel has a sandwich structure including an inner panel coupled to the kitchen wall and an outer panel fixed to the tank inner wall. The inner panel and the outer panel are each composed of a plywood protecting plate and a heat insulating material such as urethane foam.

The insulation panel is fixed to the tank inner wall by a stud bolt welded to the tank inner wall. After inserting the stud bolt to the connection part of the insulation panel, it is possible to fix the insulation panel to the inner wall of the tank by coupling the screw to the stud bolt. After the insulation panel is fixed to the inner wall of the tank, the joint portion in which the insulation panel and the stud bolt are coupled is filled with a connector made of an insulation material.

The kitchen wall, which is in contact with the cryogenic liquefied natural gas, is made by welding a metal sheet such as stainless steel. Such a kitchen wall may be damaged due to heat stress at the welding part when heat shrinkage occurs. Because of this problem, the kitchen walls have lattice folds in order to have low in-plane stiffness. The crease reduces deformation by a certain amount when heat shrinkage occurs, thereby reducing the thermal stress at the weld.

The liquefied natural gas storage tank installed in a vehicle or a vehicle may generate waves on the surface of the liquefied natural gas stored therein by a movement such as rolling or pitching of the vehicle. This wave is called sloshing, and this sloshing can cause cavitation inside the liquefied natural gas and put great pressure on the kitchen wall. When the pressure due to the slushing exceeds the yield strength of the kitchen wall, the safety of the kitchen wall may be deteriorated while the permanent deformation occurs in the wrinkles protruding into the storage space. In addition, the repetitive pressure caused by the slushing causes breakage of the heat insulation panel under the kitchen wall, and the breakage of the heat insulation panel is a cause of impairing the stability of the entire system.

The present invention is to solve the above problems, to provide a cryogenic liquid storage tank having an insulating structure and the same to prevent the deformation of the kitchen wall by slushing to increase the reliability of the product, and improve the thermal insulation performance. The purpose.

Insulating structure of the cryogenic liquid storage tank according to an embodiment of the present invention for achieving the above object is provided on the inner wall of the tank to cover the inner wall of the tank and a plurality of outer insulation panel made of a box shape to form a space inside the composite material An outer heat insulating layer comprising a, an inner heat insulating layer comprising a plurality of inner heat insulating panels provided on the outer heat insulating layer to cover the outer heat insulating layer and made of a box shape to form an inner space with a composite material, the cryogenic liquid penetrates into the inner heat insulating layer. And a kitchen wall provided on the inner heat insulating layer and having a plurality of wrinkles protruding toward the inner heat insulating layer to prevent them, and one surface of the inner heat insulating layer is provided with a plurality of accommodation grooves corresponding to the plurality of wrinkles. A wrinkle portion is inserted into the plurality of receiving grooves.

Insulating structure of the cryogenic liquid storage tank according to an embodiment of the present invention may further include a reinforcing member installed in the inner space of the outer insulation panel to improve the internal pressure of the outer insulation panel.

The reinforcing member may be formed in a plate shape to support the upper and lower surfaces of the outer insulation panel.

The reinforcing member may have a sinusoidal concave-convex portion for supporting the upper and lower surfaces of the outer insulation panel.

The reinforcing member may include a concave-convex portion of a triangular wave shape to support the upper and lower surfaces of the outer insulation panel.

The reinforcing member may be formed in a honeycomb shape to support the upper and lower surfaces of the outer insulation panel.

The reinforcing member may be made of a material selected from fiber reinforced composite material, plywood, metal, and paper.

Insulating structure of the cryogenic liquid storage tank according to an embodiment of the present invention may further include a heat insulating material disposed in the inner space of the outer heat insulating panel.

The insulation may be made of a material selected from polyurethane foam, PVC, PE, PET, Phenol.

Insulating structure of the cryogenic liquid storage tank according to an embodiment of the present invention may further include a reinforcing member installed in the inner space of the inner insulation panel to improve the internal pressure of the inner insulation panel.

Insulating structure of the cryogenic liquid storage tank according to an embodiment of the present invention may further include a heat insulating material disposed in the inner space of the inner heat insulating panel.

Insulating structure of the cryogenic liquid storage tank according to an embodiment of the present invention further includes a flow resistor coupled to one surface of the kitchen wall in contact with the cryogenic liquid in order to reduce the flow rate and reduce the impact of the cryogenic liquid stored in the storage space can do.

The flow resistor may be disposed in the plurality of corrugations.

Insulating structure of the cryogenic liquid storage tank according to an embodiment of the present invention may further include a fixing pin fixed to the kitchen wall to fix the flow resistor.

The flow resistor may be selected from a protrusion provided to protrude on one surface of the corrugation portion, a polymer foam having a plurality of pores through which fluid can pass, and a wire mesh.

Insulating structure of the cryogenic liquid storage tank according to an embodiment of the present invention, has a coupling hole formed on one surface of the plurality of inner heat insulating panel, a through hole corresponding to the coupling hole and adjacent the plurality of inner heat insulating panels to each other. Further comprising a plurality of coupling members for connecting the two neighboring inner insulating panels for coupling between them, a fixing member inserted into the coupling hole through the through hole to fix the coupling member to the two neighboring insulating panels. Can be.

The plurality of receiving grooves may be formed in the middle of each of the inner insulation panels.

The accommodating groove may include a chamfering groove provided to accommodate the half of the corrugation portion at an upper edge of any one of the two inner insulation panels disposed adjacent to each other, and the other half of the corrugation portion at the other upper edge. Including a chamfering groove provided for receiving, it may be provided in the adjacent portions of the two inner insulating panels adjacent to each other.

Insulating structure of the cryogenic liquid storage tank according to an embodiment of the present invention may further include a buffer member interposed between the inner heat insulating layer and the kitchen wall to prevent the gap between the plurality of inner heat insulating layer and the kitchen wall. .

The buffer member may be inserted into the receiving groove so as to be interposed only between the inner heat insulating layer and the plurality of wrinkles.

Insulating structure of the cryogenic liquid storage tank according to an embodiment of the present invention further comprises a secondary barrier disposed between the outer insulation layer and the inner insulation layer to cover the outer insulation layer to prevent the cryogenic liquid from penetrating into the outer insulation layer. Can be.

The secondary barrier is coupled to two neighboring outer insulation panels to cover a gap between a plurality of barrier sheets coupled to one surface of each outer insulation panel and two outer insulation panels neighboring each other among the plurality of outer insulation panels. It may include a connecting barrier sheet coupled to at least a portion overlapping the two barrier sheets.

The connecting barrier sheet may have a bent portion recessed into a gap between two neighboring outer insulating panels.

Insulating structure of the cryogenic liquid storage tank according to an embodiment of the present invention is between the connecting barrier sheet and the inner insulating panel covering the connecting barrier sheet of the plurality of inner insulating panels to press the connecting barrier sheet. It may further include an intervening insert.

The plurality of outer insulation panels may be made of fiber reinforced composite material.

The plurality of inner insulation panels may be made of fiber reinforced composite material.

Insulating structure of the cryogenic liquid storage tank according to an embodiment of the present invention may further include an aluminum foil (Foil) bonded to the outer surface of the outer insulation panel to reduce the radiation loss of the outer insulation panel.

Insulating structure of the cryogenic liquid storage tank according to an embodiment of the present invention may further include an aluminum foil (Foil) coupled to the outer surface of the inner insulating panel in order to reduce the radiation loss of the inner insulating panel.

Insulating structure of the cryogenic liquid storage tank according to an embodiment of the present invention may further include an auxiliary receiving groove formed on one surface of the inner heat insulating layer to accommodate the additional installation.

Insulating structure of the cryogenic liquid storage tank according to an embodiment of the present invention further comprises a plurality of fixing devices for coupling the plurality of outer insulating panels to the stud bolt provided on the inner wall of the tank, the fixing device, the outer It may include a body coupled to the heat insulating panel, the connecting member having a through hole for inserting the stud bolt is slidably coupled to the body.

Insulating structure of the cryogenic liquid storage tank according to an embodiment of the present invention for achieving the above object is provided on the inner wall of the tank to cover the inner wall of the tank and a plurality of insulating panels made of a box shape to form a space inside the composite material And a kitchen wall including a plurality of wrinkles provided on the insulation layer and protruding toward the insulation layer to cover the insulation layer and prevent the cryogenic liquid from penetrating into the insulation layer, wherein one surface of the insulation layer has the plurality of wrinkles. A plurality of accommodation grooves corresponding to the portion is provided, and the plurality of pleats are inserted into the plurality of accommodation grooves.

Cryogenic liquid storage tank according to an embodiment of the present invention for achieving the above object, the tank inner wall is provided with a storage space for storing the cryogenic liquid therein, the tank inner wall is provided on the inner wall to cover the tank and the composite material An outer heat insulating layer including a plurality of outer heat insulating panels made of a box shape to form a space therein, and a plurality of inner heat insulating panels provided on the outer heat insulating layer to cover the outer heat insulating layer and made of a box shape to form an inner space of a composite material. An inner heat insulating layer to cover the inner heat insulating layer, and to prevent the cryogenic liquid from penetrating into the inner heat insulating layer, a kitchen wall provided on the inner heat insulating layer and having a plurality of wrinkles protruding toward the inner heat insulating layer, wherein one surface of the inner heat insulating layer Corresponding to the plurality of wrinkles Features a plurality of the receiving groove, the plurality of additional folds are inserted into the receiving groove of the plurality.

Cryogenic liquid storage tank according to an embodiment of the present invention for achieving the above object, the tank inner wall is provided with a storage space for storing the cryogenic liquid therein, the tank inner wall is provided on the inner wall to cover the tank and the composite material An insulation layer including a plurality of insulation panels made of a box shape to form a space therein, and a kitchen having a plurality of corrugations provided on the insulation layer and protruding toward the insulation layer to cover the insulation layer and prevent the cryogenic liquid from penetrating into the insulation layer. It includes a wall, one surface of the heat insulating layer is provided with a plurality of receiving grooves corresponding to the plurality of wrinkles, the plurality of wrinkles are inserted into the plurality of receiving grooves.

Insulating structure according to an embodiment of the present invention and the cryogenic liquid storage tank having the same, the wrinkles provided in the kitchen wall directly in contact with the cryogenic liquid is inserted into the receiving groove formed in the inner insulation layer without protruding into the storage space by the pressure of the cryogenic liquid The risk of deformation or breakage is reduced.

In addition, since the heat insulation panel for heat insulation is manufactured in the form of an integral box made of a composite material, the cryogenic liquid has high resistance to pressure, excellent heat insulation performance, and improved productivity.

In addition, by providing a flow resistor that can attenuate the kinetic energy of the fluid in the kitchen wall in contact with the cryogenic liquid, it is possible to fundamentally dampen the flow rate of the cryogenic liquid and to mitigate the impact when the cryogenic liquid hits. Therefore, the risk of breakage of wrinkles can be greatly reduced, and the reliability of the product can be improved.

Hereinafter, an insulating structure and a cryogenic liquid storage tank having the same according to an embodiment of the present invention will be described with reference to the accompanying drawings.

In describing the present invention, the size or shape of the components shown in the drawings may be exaggerated or simplified for clarity and convenience of description. In addition, terms that are specifically defined in consideration of the configuration and operation of the present invention may vary depending on the intention or custom of the user or operator. These terms are to be construed in accordance with the meaning and concept consistent with the technical idea of the present invention based on the contents throughout the present specification.

1 is an exploded side view showing a part of a cryogenic liquid storage tank according to an embodiment of the present invention.

1 and the cryogenic liquid storage tank 100 according to an embodiment of the present invention is between the tank inner wall 105 and the tank inner wall 105 and the storage space provided with a storage space for storing the cryogenic liquid therein. Insulating structure 115 is coupled to the tank inner wall 105 to prevent heat transfer of the. The thermal insulation structure 115 includes an outer insulation layer 120 covering the tank inner wall 105, a secondary barrier 130 covering the outer insulation layer 120, an inner insulation layer 140 covering the secondary barrier 130, and an inner insulation layer 140. Kitchen wall 160 covering the.

The outer insulation layer 120 includes a plurality of outer insulation panels 121 coupled to the tank inner wall 105. The outer insulation panel 121 is coupled to the tank inner wall 105 by a stud bolt 111 and an adhesive 112 fixed to the tank inner wall 105. A step adjusting pad 113 is installed between the tank inner wall 105 and the outer insulation panel 121 to adjust the step between the outer insulation panel 121. In addition, a gap filler 114 for filling the gap is inserted between the two outer insulation panels 121 disposed adjacent to each other.

As shown in FIGS. 1 and 2, the fixing device 170 coupled to the stud bolt 111 is coupled to the lower edge of the outer insulation panel 121. The fixing device 170 includes a body 171 coupled to the outer insulation panel 121 and a connection member 174 slidably coupled to the body 171. The body 171 has a lower surface fixing portion 172 coupled to the lower surface of the outer insulation panel 121 and a side fixing portion 173 vertically connected to the fixing portion 172 when coupled to the side surface of the outer insulation panel 121. It includes. The lower surface fixing portion 172 and the side fixing portion 173 are provided with through holes 175 and 176, respectively, and the body 171 is a fixing member such as a bolt 177 or 178 or a rivet (not shown). Is coupled to the outer heat insulating panel 121 through the through holes 175, 176 is fixed to the outer heat insulating panel 121.

The connecting member 174 has a through hole 179 into which the stud bolt 111 is inserted. When the coupling member 174 is coupled to the stud bolt 111 and the nut 115 is coupled to the upper portion of the stud bolt 111, the outer insulation panel 121 may be fixed to the tank inner wall 105. Since the connection member 174 is movable, when the outer insulation panel 121 is installed on the tank inner wall 105, the coupling position of the outer insulation panel 121 is easily adjusted by adjusting the position of the connection member 174. Can be.

As shown in FIG. 3, the outer insulation panel 121 has a box shape in which an inner space 122 is provided. The outer insulation panel 121 is made of various composite materials such as fiber reinforced composite materials including reinforcing fibers such as glass fibers or natural fibers. In the inner space 122 of the outer insulation panel 121, a plurality of reinforcing members 123 for improving the internal pressure of the outer insulation panel 121 are installed. The reinforcing member 123 is formed in a plate shape to support the upper and lower surfaces of the outer insulation panel 121 and is disposed in the longitudinal direction of the outer insulation panel 121. The reinforcing member 123 may be formed of a composite material such as the outer insulation panel 121 or various materials capable of improving the compressive strength of the outer insulation panel 121 such as plywood, metal, and paper.

In order to arrange the reinforcing member 123 inside the outer insulation panel 121, a portion of the outer insulation panel 121 is opened to attach the reinforcement member 123 to the inner surface of the outer insulation panel 121, and then the outer insulation. An open portion of the panel 121 may be covered. Alternatively, a method of making the outer insulation panel 121 into two or more parts and combining the reinforcing member 123 in an inserted state may be used.

4 is filled with the inner space 122 of the outer insulation panel 121 to improve the internal pressure of the outer insulation panel 121 and to improve the insulation performance. Here, the heat insulator 124 may be made of a material such as polyurethane foam, PVC, PE, PET, Phenol. The heat insulating material 124 may be filled in the internal space 122 by opening a portion of the outer heat insulating panel 121 as in the method of installing the reinforcing member 123. Alternatively, the heat insulating material 124 may be filled in the outer heat insulating panel 121 by punching a hole in the sealed outer heat insulating panel 121 and injecting and foaming the heat insulating material 124 by a Reactopn-injection molding (RIM) method.

5 to 9 illustrate various forms of reinforcing members that may be disposed in the outer insulation panel 121.

The reinforcing member 125 illustrated in FIG. 5 is formed in a plate shape and a plurality of reinforcing members 125 are disposed in the width direction of the outer insulation panel 121. Reinforcement member 126 shown in Figure 6 is made of a grid shape. The reinforcing member 127 illustrated in FIG. 7 is provided with a sinusoidal uneven portion 127a continuously to support the upper and lower surfaces of the outer insulation panel 121, and the reinforcing member 128 illustrated in FIG. 8 has a triangular wave form. The concave-convex portion 128a is provided continuously. The reinforcing member 129 illustrated in FIG. 9 is formed in a honeycomb form, and the inner space of the reinforcing member 129 may be filled with the heat insulating material 124.

In addition, the heat insulating member may be disposed in the inner space 122 of the outer heat insulating panel 121 and may be used in various forms to improve the internal pressure of the outer heat insulating panel 121. In addition, only the heat insulating material may be filled in the inner space 122 of the outer heat insulating panel 121 without a reinforcing member. Although not shown in the drawings, an aluminum foil may be coupled to an outer surface of the outer insulation panel 121 to reduce radiation loss of the outer insulation panel 121.

Referring back to FIG. 1, the secondary barrier 130 is disposed on the outer heat insulating layer 120. The secondary barrier 130 covers the upper surface of the outer insulation layer 120 to prevent the cryogenic liquid stored in the storage space from penetrating into the outer insulation layer 120. That is, even if the cryogenic liquid penetrates into the inner heat insulating layer 140 due to the breakage of the kitchen wall 160, the negative barrier 130 prevents it from penetrating into the outer heat insulating layer 120.

The secondary barrier 130 includes a barrier sheet 132 attached to the upper surface of the outer insulation panel 121 and a barrier sheet 132 for connecting the two barrier sheets 131 disposed adjacent thereto. The barrier sheet 131 and the connecting barrier sheet 132 may be used to prevent the flow of cryogenic liquids such as a triplex in which a glass fiber composite material is bonded to both sides of stainless steel, aluminum foil, or metal foil. Made of material

The connecting barrier sheet 132 is attached to the upper surfaces of the two barrier sheets 131 so as to partially overlap with the two barrier sheets 131 disposed adjacent to each other. The connecting barrier sheet 132 is pressed against the two barrier sheets 131 while being pressed from the upper side to the lower direction. At this time, the bending portion 133 is provided in the connecting barrier sheet 132 while the middle portion of the connecting barrier sheet 132 is bent and deformed into a gap between two adjacent outer insulating panels 121.

As shown in FIG. 10, the fillet 134 provided at the upper edge of the outer insulation panel 121 induces bending deformation of the barrier sheet 132 for connection. The curved portion 133 serves to reduce thermal stress generated at cryogenic temperatures, and to reduce residual stress generated when the adhesive is hardened when the barrier sheet 132 for connection is attached to the adhesive.

1 and 11, the inner insulation layer 140 is an inner insulation panel for connection covering a space between an inner insulation panel 141 disposed on the outer insulation panel 121 and two neighboring outer insulation panels 121. 142. These inner heat insulating panels 141 and the inner heat insulating panels 142 for connection are made of a box shape provided with an inner space 144 of a composite material. As a material of the inner insulation panel 141 and the inner insulation panel 142 for connection, various composite materials such as fiber reinforced composite materials including reinforcing fibers such as glass fiber or natural fiber may be used.

An accommodation groove 143 is provided in the middle of the upper surface of the inner insulation panel 141 and the connection inner insulation panel 142. The accommodation groove 143 is for accommodating the pleats 161 of the kitchen wall 160. As shown in Figure 1, the receiving member 145 is inserted into the receiving groove 143. The buffer member 145 fills a gap that may occur between the inner heat insulating layer 140 and the wrinkle part 161, and the inner heat insulating panel 141 and the inner heat insulating panel 142 for connection when the kitchen wall 160 is coupled to each other. It prevents damage and absorbs the fluid shock caused by the flow of cryogenic liquid stored in the storage space. The buffer member 145 may be formed of various materials that can fill the space between the inner heat insulating layer 140 and the kitchen wall 160 such as glass fiber or natural fiber. The buffer member 145 may be disposed on the entire upper surface of the inner heat insulating layer 140 as well as the receiving groove 143.

The inner insulation panel 142 for connection is coupled after the other inner insulation panel 141 is attached to the secondary barrier 130 to cover the barrier wall sheet 132 for connection. An insert 146 is inserted between the connecting barrier sheet 132 and the connecting inner insulation panel 142. The insert 146 prevents the coupling portion between the barrier sheet 131 and the connecting barrier sheet 132 from being damaged by pressurizing the connecting barrier sheet 132 and for connecting by contraction of the inner heat insulating layer 140. The thermal stress generated in the inner insulation panel 142 is prevented from being transferred to the secondary barrier 130. The insert 146 is made of a material that can be modified, such as glass fiber or natural fiber may play a role of controlling the step of the inner insulation panel 142 for connection.

As shown in FIG. 11, the inner insulation panel 141 and the inner insulation panel 142 for connection are coupled by a mechanical coupling method by the coupling member 150. To this end, a coupling hole 147 is provided in the inner insulation panel 141 and a connection inner insulation panel 142, and a through hole 151 corresponding to the coupling hole 147 is provided in the coupling member 150. A plurality of fixing members such as bolts 152 or rivets are formed in the through holes of the coupling member 150 while the coupling member 150 is placed on the upper surface of the inner insulation panel 141 and the upper surface of the inner insulation panel 142 for connection. The inner heat insulating panel 141 and the inner heat insulating panel 142 are connected to each other by being inserted into the coupling hole 147 of the inner heat insulating panel 141 and the inner heat insulating panel 142 for connection.

Coupling grooves 148 into which the coupling member 150 is inserted are formed in the inner insulation panel 141 and the inner insulation panel 142 for connection. Coupling member 150 is inserted into each coupling groove 148 does not protrude from each upper surface of the inner heat insulating panel 141 and the inner heat insulating panel 142 for connection. When the coupling member 150 protrudes from the inner insulation panel 141 and the connection inner insulation panel 142, a gap may occur between the kitchen walls 160 when the kitchen wall 160 is coupled to the inner insulation layer 140.

The coupling member 150 may be made of various materials, and when the metal is made of metal, the kitchen wall 160 may be welded to the coupling member 150. Therefore, when the coupling member 150 is made of metal, it is not necessary to install a separate metal member on the inner insulation layer 140 to weld the kitchen wall 160 to the inner insulation layer 140.

In the present invention, the inner insulation panel 142 for connection may be installed on the secondary barrier 130 in various ways in addition to the mechanical coupling method by the coupling member 150. For example, the inner insulation panel 142 for connection may be adhered to the side wall 130 by an adhesive, such as the inner insulation panel 141.

As described above, the inner insulation panel 141 and the inner insulation panel 142 for connection are made in the form of a box provided with an inner space 144 of a composite material. 12 and 13 illustrate a portion of the inner insulation panel 142 by removing it. The inner insulation panel 141 and the connection of the inner insulation panel 142 for connection are the same.

12 and 13, a plurality of reinforcing members 149 are installed in the inner space 144 of the inner insulation panel 142 for connection to improve the internal pressure of the inner insulation panel 141. The reinforcing member 149 is formed in a plate shape to support the upper and lower surfaces of the inner insulation panel 141. The reinforcing member 149 may be made of a composite material such as the outer insulation panel 121 or various materials capable of improving the compressive strength of the outer insulation panel 121 such as plywood, metal, and paper.

In order to arrange the reinforcing member 149 in the inner heat insulating panel 141, a part of the inner heat insulating panel 141 is opened to attach the reinforcing member 149 to the inner surface of the inner heat insulating panel 141, and then heat insulating inside. An open portion of the panel 141 may be covered. Alternatively, a method of making the inner insulation panel 141 into two or more parts and combining them with the reinforcing member 149 inserted therein may be used. As the reinforcing member 149 for improving the internal pressure of the inner insulation panel 141, in addition to the plate shape, the reinforcing member provided with a lattice-like reinforcing member, the reinforcing member provided with a sinusoidal concave-convex portion, the reinforcing member provided with a triangular wave-shaped concave-convex portion, honey Various shapes such as comb-shaped reinforcing members may be used.

In addition, the inner space 144 of the inner heat insulating panel 121 may be filled with a heat insulating material for improving the internal pressure of the inner heat insulating panel 141 and to improve the heat insulating performance. As the heat insulating material, those made of a material such as polyurethane foam, PVC, PE, PET, Phenol, and the like may be used. As a method of filling the heat insulating material, a part of the inner heat insulating panel 141 is opened and the heat insulating material is filled in the inner space 144, or a hole-injection molding (RIM) method is made by drilling a hole in the sealed inner heat insulating panel 141. Insulating and foaming the heat insulating material may be filled with the heat insulating material in the inner heat insulating panel (141). Like the outer insulation panel 121, an aluminum foil for reducing radiation loss may be coupled to an outer surface of the inner insulation panel 141.

1 and 14, a kitchen wall 160 is installed on the inner heat insulating layer 140 to prevent the cryogenic liquid from the storage space from penetrating into the inner heat insulating layer 140. The kitchen wall 160 has a plurality of wrinkles 161 protruding toward the inner heat insulating layer 140. The wrinkle part 161 is to impart in-plane stiffness to the kitchen wall 160 and serves to reduce thermal stress by being deformed when heat shrinkage of the kitchen wall 160 occurs. The plurality of wrinkles 161 are not accommodated in the storage space by being accommodated in the plurality of receiving grooves 143 of the inner heat insulating layer 140. Thus, less pressure due to slushing of the cryogenic liquid reduces the risk of breakage. The cross-sectional shape of the wrinkle portion 161 and the receiving groove 143 for accommodating the same may be a variety of shapes, such as semi-circular, semi-elliptic, or polygonal.

As shown in FIG. 14, the pleats 161 are provided with a flow resistor 162 for reducing the flow rate of the cryogenic liquid stored in the storage space and reducing the impact. The flow resistor 162 is fixed by a plurality of fixing pins 163 fixed to the kitchen wall 160. In addition to the wire mesh type as illustrated, the flow resistor 162 may be provided with a kinetic energy of a liquid such as a protrusion form provided to protrude into the kitchen wall 160, a polymer foam having a plurality of pores through which the fluid can pass. Various forms of attenuation can be used.

In addition to the shock absorbing function of the fluid, the flow resistor 162 may be used as a means for identifying a part where the impact pressure of the fluid is mainly generated. That is, when the liquid storage tank 100 is used for a predetermined time and the deformation or breakage form of the flow resistor 162 or the installation position of the flow resistor 162 where the deformation or breakage has occurred is investigated, the fluid shock pressure is increased at any part of the tank. You can check to see if it occurs mainly. The flow resistor 162 may be installed at various positions on the upper surface of the kitchen wall 160 other than the pleats 161.

In the cryogenic liquid storage tank 100 according to the embodiment of the present invention, the pleating portion 161 of the kitchen wall 160 directly contacting the cryogenic liquid is recessed toward the tank inner wall 105, so that the cryogenic liquid is slushed. It can withstand high pressure. In addition, since the insulation panels 121, 141 and 142 for insulation are manufactured in the form of a box made of a composite material, it is possible to improve the production line as well as to improve the cold storage performance.

On the other hand, Figure 15 shows a cryogenic liquid storage tank according to another embodiment of the present invention.

The liquid storage tank 200 shown in FIG. 15 has the same configuration as that of the liquid storage tank 100 described above, except that the inner heat insulating layer 240 for accommodating the pleats 161 of the kitchen wall 160 is provided. The forming positions of the receiving grooves 243 are different. The accommodating groove 243 is not provided in the middle of the inner insulation panel 241 or the inner insulation panel 242 for connection, and the two neighboring inner insulation panels 241 or the neighboring inner insulation panel 241 and the inner side for the connection. It is provided over the heat insulation panel 242.

To this end, upper edges of the inner heat insulating panel 241 and the inner heat insulating panel 242 for connection are provided with chamfering grooves 243a of the same size and shape in which half of the pleats 161 can be accommodated, respectively. Accordingly, two chamfering grooves 243a meet and one receiving groove 243 is provided at an adjacent portion between two inner insulation panels 241 disposed adjacent to each other, and an inner insulation panel 241 disposed adjacent to each other. Two chamfering grooves 243a also meet each other between adjacent inner insulation panels 242 for connection, and one receiving groove 243 is provided.

As shown in FIG. 15, an auxiliary receiving groove 244 is provided on an upper surface of the inner heat insulating layer 240 to install additional installations such as pipes and sensors. The auxiliary receiving groove 244 is in the middle of the inner heat insulating panel 241 or in the middle of the inner heat insulating panel 242 for connection, the adjacent portion between two adjacent inner heat insulating panels 241 or the inner inner heat insulating panel 241. And an adjacent portion between the inner insulation panel 242 for connection.

In addition, since the structure of the remaining components constituting the liquid storage tank 200 according to another embodiment of the present invention is the same as the liquid storage tank 100 according to an embodiment of the present invention, a detailed description thereof Omit.

In the above-described two embodiments, the outer insulation layer 120 and the inner insulation layer 140 and 240 are provided between the tank inner wall 105 and the kitchen wall 160, but the tank inner wall 105 and the kitchen wall ( Only one insulation layer for insulation may be installed between 160. In this case, the heat insulation layer includes a plurality of heat insulation panels, and each heat insulation panel is made of a box made of a composite material. And the upper surface of the insulating panel is provided with a receiving groove that can be inserted into the pleats 161 of the kitchen wall 160.

The embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical idea of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

1 is an exploded side view showing a part of a cryogenic liquid storage tank according to an embodiment of the present invention.

2 is a perspective view showing the fixing device shown in FIG.

Figure 3 shows a cut away portion of the outer insulation panel of the cryogenic liquid storage tank according to an embodiment of the present invention.

4 to 9 illustrate various embodiments of the outer insulation panel.

FIG. 10 shows a state in which an inner insulation panel and a connection inner insulation panel are disposed on a sidewall of a cryogenic liquid storage tank according to an embodiment of the present invention.

11 is for explaining the coupling structure of the inner heat insulating panel and the inner heat insulating panel for connection of the cryogenic liquid storage tank according to an embodiment of the present invention.

12 and 13 illustrate a portion of the inner insulation panel of the cryogenic liquid storage tank according to an embodiment of the present invention cut away.

Figure 14 shows the kitchen wall of the cryogenic liquid storage tank according to an embodiment of the present invention.

Figure 15 is an exploded side view showing a part of the cryogenic liquid storage tank according to another embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100, 200: cryogenic liquid storage tank 105: tank inner wall

110: insulation structure 111: stud bolt

120: outer insulation layer 121: outer insulation panel

123, 125, 126, 127, 128, 129, 149: reinforcing member

124: insulation 130: side wall

131: barrier sheet 132: barrier sheet for connection

140, 240: inner insulation layer 141, 241: inner insulation panel

142, 242: inner insulation panel for connection 143, 243: receiving groove

145: buffer member 146: insert

150: coupling member 160: kitchen wall

161: wrinkle portion 162: flow resistor

170: fixing device

Claims (33)

In the thermal insulation structure of the cryogenic liquid storage tank coupled to the tank inner wall to prevent heat transfer between the tank inner wall and the storage space in which the cryogenic liquid is stored, An outer insulation layer provided on the inner wall of the tank to cover the inner wall of the tank, the outer insulation layer including a plurality of outer insulation panels formed in a box shape to form a space therein; An inner heat insulating layer provided on the outer heat insulating layer to cover the outer heat insulating layer, the inner heat insulating layer including a plurality of inner heat insulating panels formed in a box shape to form an inner space of a composite material; And And a kitchen wall provided on the inner heat insulating layer to prevent the cryogenic liquid from penetrating into the inner heat insulating layer and having a plurality of wrinkles protruding toward the inner heat insulating layer. The insulating structure of the cryogenic liquid storage tank, characterized in that a plurality of receiving grooves corresponding to the plurality of wrinkles is provided on one surface of the inner heat insulating layer, the plurality of wrinkles are inserted into the plurality of receiving grooves. The method of claim 1, Insulating structure of the cryogenic liquid storage tank further comprises a reinforcing member installed in the inner space of the outer insulation panel to improve the internal pressure of the outer insulation panel. The method of claim 2, The reinforcing member is a heat insulating structure of a cryogenic liquid storage tank, characterized in that formed in the form of a plate to support the inner upper and lower surfaces of the outer insulation panel. The method of claim 2, The reinforcing member is a heat insulating structure of a cryogenic liquid storage tank, characterized in that it has a sinusoidal concave-convex portion for supporting the inner upper and lower surfaces of the outer insulation panel. The method of claim 2, The reinforcing member is a heat insulating structure of a cryogenic liquid storage tank, characterized in that having a concave-convex portion of the triangular wave shape for supporting the upper and lower surfaces of the outer insulation panel. The method of claim 2, The reinforcing member is a heat insulating structure of a cryogenic liquid storage tank, characterized in that the honeycomb form for supporting the inner upper and lower surfaces of the outer insulation panel. The method of claim 2, The reinforcing member is a heat-insulating structure of cryogenic liquid storage tank, characterized in that made of a fiber reinforced composite material, plywood, metal, paper. 8. The method according to any one of claims 1 to 7, Insulating structure of the cryogenic liquid storage tank further comprises a heat insulating material disposed in the inner space of the outer heat insulating panel. The method of claim 8, The heat insulating material is a heat insulating structure of cryogenic liquid storage tank, characterized in that made of a material selected from polyurethane foam, PVC, PE, PET, Phenol. The method of claim 1, Insulating structure of the cryogenic liquid storage tank further comprises a reinforcing member installed in the inner space of the inner heat insulating panel to improve the internal pressure of the inner heat insulating panel. The method according to claim 1 or 10, Insulating structure of the cryogenic liquid storage tank further comprises a heat insulating material disposed in the inner space of the inner heat insulating panel. The method of claim 1, Insulating structure of the cryogenic liquid storage tank further comprises a flow resistor coupled to one surface of the kitchen wall in contact with the cryogenic liquid in order to reduce the flow rate of the cryogenic liquid stored in the storage space and reduce the impact. 13. The method of claim 12, Insulation structure of the cryogenic liquid storage tank, characterized in that the flow resistor is disposed in the plurality of pleats. The method of claim 13, Insulating structure of the cryogenic liquid storage tank further comprises a fixing pin fixed to the kitchen wall for fixing the flow resistor. 13. The method of claim 12, The flow resistor is a heat insulating structure of the cryogenic liquid storage tank, characterized in that the protrusion is provided to protrude on one surface of the corrugated portion, the polymer foam having a plurality of pores through which the fluid can pass, the wire mesh (Wire-mesh). . The method of claim 1, A coupling hole formed in one surface of the plurality of inner insulation panels; A plurality of coupling members having through-holes corresponding to the coupling holes and connecting the two inner insulating panels adjacent to each other to couple the plurality of inner insulating panels to each other; And And a fixing member inserted into the coupling hole through the through hole to fix the coupling member to the two neighboring heat insulating panels. The method of claim 1, The plurality of receiving grooves are formed in the middle of each of the inner insulation panel, the insulating structure of the cryogenic liquid storage tank. The method of claim 1, The accommodating groove may include a chamfering groove provided to accommodate the half of the corrugation portion at an upper edge of any one of the two inner insulation panels disposed adjacent to each other, and the other half of the corrugation portion at the other upper edge. Insulating structure of the cryogenic liquid storage tank, characterized in that provided in the adjacent portions of the two inner insulating panels adjacent to each other, including a chamfering groove provided for receiving. The method of claim 1, Insulating structure of the cryogenic liquid storage tank further comprises a buffer member interposed between the inner heat insulating layer and the kitchen wall in order to prevent the gap between the plurality of inner heat insulating layer and the kitchen wall. The method of claim 19, The buffer member is a heat insulating structure of the cryogenic liquid storage tank, characterized in that inserted into the receiving groove so as to be interposed only between the inner heat insulating layer and the plurality of corrugations. The method of claim 1, Insulating structure of the cryogenic liquid storage tank further comprises a secondary barrier disposed between the outer insulating layer and the inner heat insulating layer to cover the outer heat insulating layer to prevent the cryogenic liquid from penetrating into the outer heat insulating layer. The method of claim 21, The sub-barrier is coupled to two neighboring outer insulation panels to cover a gap between a plurality of barrier sheets coupled to one surface of each outer insulation panel and two outer insulation panels neighboring each other among the plurality of outer insulation panels. An insulating structure of a cryogenic liquid storage tank, characterized in that it comprises a connecting barrier sheet coupled to overlap at least a portion of the two barrier sheets. The method of claim 22, The barrier sheet for connection has a thermal insulation structure of the cryogenic liquid storage tank, characterized in that it has a bent portion recessed in the gap between the two adjacent outer insulation panels. The method of claim 22, Cryogenic liquid storage further comprises an insert interposed between the connecting barrier sheet and the inner insulating panel covering the connecting barrier sheet of the plurality of inner insulating panels to pressurize the connecting barrier sheet. Insulation structure of the tank. The method of claim 1, The plurality of outer insulation panel is a heat insulating structure of cryogenic liquid storage tank, characterized in that made of fiber-reinforced composite material. The method of claim 1, The plurality of inner insulation panel is a heat insulating structure of cryogenic liquid storage tank, characterized in that made of fiber-reinforced composite material. The method of claim 1, Insulating structure of the cryogenic liquid storage tank further comprises an aluminum foil (Foil) coupled to the outer surface of the outer insulation panel to reduce radiation loss of the outer insulation panel. The method of claim 1, Insulating structure of the cryogenic liquid storage tank further comprises an aluminum foil (Foil) coupled to the outer surface of the inner heat insulating panel to reduce radiation loss of the inner heat insulating panel. The method of claim 1, Insulating structure of the cryogenic liquid storage tank further comprises an auxiliary receiving groove formed on one surface of the inner heat insulating layer to accommodate the additional installation. The method of claim 1, Further comprising a plurality of fixing devices for coupling the plurality of outer insulation panels to the stud bolt provided on the inner wall of the tank, The fixing device has a body coupled to the outer heat insulating panel, the insulating structure of the cryogenic liquid storage tank, characterized in that it comprises a connecting member having a through hole for inserting the stud bolt is slidably coupled to the body. In the thermal insulation structure of the cryogenic liquid storage tank coupled to the tank inner wall to prevent heat transfer between the tank inner wall and the storage space in which the cryogenic liquid is stored, A heat insulation layer provided on the inner wall of the tank to cover the inner wall of the tank and including a plurality of heat insulation panels made of a box shape to form a space therein; And And a kitchen wall provided on the heat insulation layer to cover the heat insulation layer and prevent the cryogenic liquid from penetrating into the heat insulation layer, and having a plurality of wrinkles protruding toward the heat insulation layer. The insulating structure of the cryogenic liquid storage tank, characterized in that a plurality of receiving grooves corresponding to the plurality of wrinkles is provided on one surface of the heat insulating layer, the plurality of wrinkles are inserted into the plurality of receiving grooves. An inner wall of a tank having a storage space for storing cryogenic liquids therein; An outer insulation layer provided on the inner wall of the tank to cover the inner wall of the tank, the outer insulation layer including a plurality of outer insulation panels formed in a box shape to form a space therein; An inner heat insulating layer provided on the outer heat insulating layer to cover the outer heat insulating layer, the inner heat insulating layer including a plurality of inner heat insulating panels formed in a box shape to form an inner space of a composite material; And And a kitchen wall provided on the inner heat insulating layer to cover the inner heat insulating layer and prevent the cryogenic liquid from penetrating into the inner heat insulating layer, and having a plurality of wrinkles protruding toward the inner heat insulating layer. Cryogenic liquid storage tank, characterized in that a plurality of receiving grooves corresponding to the plurality of wrinkles is provided on one surface of the inner heat insulating layer, the plurality of wrinkles are inserted into the plurality of receiving grooves. An inner wall of a tank having a storage space for storing cryogenic liquids therein; A heat insulation layer provided on the inner wall of the tank to cover the inner wall of the tank and including a plurality of heat insulation panels made of a box shape to form a space therein; And And a kitchen wall provided on the heat insulation layer to cover the heat insulation layer and prevent the cryogenic liquid from penetrating into the heat insulation layer, and having a plurality of wrinkles protruding toward the heat insulation layer. Cryogenic liquid storage tank, characterized in that a plurality of receiving grooves corresponding to the plurality of wrinkles is provided on one surface of the heat insulating layer, the plurality of wrinkles are inserted into the plurality of receiving grooves.

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