Fuel tank support system and fuel tank

Abstract

A fuel tank support system and a fuel tank having same are disclosed. The fuel tank support system comprises: a fixed support fixedly coupled to a predetermined position of an outer tank and having an inner space formed therein; a movable support accommodated in the inner space and formed to move in conjunction with a tension rod in the inner space; and the tension rod passing through the fixed support and the movable support in the longitudinal direction of the fuel tank and having a connection device for connection to an inner tank formed at one end.

Description

Fuel tank support system and fuel tank

[0001] The present invention relates to a fuel tank support system. More specifically, it relates to a system capable of supporting an inner tank while keeping it spaced apart from the outer tank in a fuel tank having an inner tank and an outer tank.

[0002]

[0003] Fuel tanks equipped with an inner tank and an outer tank for storing low-temperature or cryogenic fuels (e.g., liquid hydrogen) are widely known.

[0004] Such fuel tanks are implemented such that the inner tank is spaced apart from the outer tank to minimize heat inflow into the inner tank. In order to support the inner tank, a specific support system (or device) must be provided, and this support system is necessarily implemented to connect the inner tank and the outer tank. Since heat inflow from the outside into the inner tank occurs through this support system, it is necessary for the support system to be implemented to have robust characteristics against heat inflow.

[0005] In addition, such a support system needs to possess robust characteristics against external shocks or vibrations; otherwise, there is a risk that the support system itself may be damaged.

[0006] Therefore, a technical concept for a support system is required that prevents excessive load by ensuring that it has robust characteristics against heat inflow while maintaining a certain degree of freedom of movement.

[0007]

[0008] * Prior art literature

[0009] - Patent Documents

[0010] (Patent Document 0001) Korean Registered Patent (Registration No. 10-2377255, "Insulation device for a cryogenic storage tank with easy installation of a support between an inner tube and an outer tube")

[0011]

[0012]

[0013] The problem that the present invention aims to solve is to provide a technical concept for a support system that supports an inner tank while suppressing heat inflow and allows for a certain degree of freedom of movement so as not to apply an excessive load.

[0014]

[0015] A support system for a fuel tank comprising an inner tank and an outer tank to solve the above technical problem, and for supporting the inner tank while spaced apart from the outer tank, comprises a fixed support fixedly coupled at a predetermined position of the outer tank and having an inner space formed therein, a movable support accommodated in the inner space and formed to move in conjunction with a tension rod in the inner space, and a tension rod penetrating the fixed support and the movable support in the longitudinal direction of the fuel tank and having a connecting device formed at one end for connecting to the inner tank.

[0016] The above fixed support may include a first support body that is fixedly coupled to the outer tank and has an inner space formed so that the tension rod can pass through, and a first cover that is fixedly coupled to the upper edge of the support body and has a predetermined through-structure formed so that the tension rod can pass through inside.

[0017] The above through-hole structure may be characterized by having a circular through-hole in the center of the cover and at least one extended through-hole formed extending outward from the edge of the through-hole, having a width equal to or greater than the diameter of the tension rod.

[0018] The above inner space may be formed to have the deepest depth in the center and to form a curved lower portion such that the depth decreases towards the edge.

[0019] The first support body may be characterized by having a cut portion formed outward from the center of the first support body with a width equal to or greater than the width of the tension rod so that the tension rod can move along the cut portion, and the fixed support is installed so that the cut portion faces toward the inner tank.

[0020] The above-mentioned movable support may include a second support body that is received in the inner space and formed to be able to move by contacting within the inner space of the fixed support, and has a receiving groove formed to a certain depth inside; a hillside washer formed to have a hillside having a certain height on both sides, with a lower part received in the receiving groove of the second support body; and a second cover that has a through hole formed inside to fix the hillside washer downward and is coupled to the upper edge of the second support body.

[0021] The above-mentioned hillside washer is formed such that its upper end protrudes upward relative to the upper end of the above-mentioned fixed support, and the upper end of the above-mentioned hillside washer may be formed to support the lower end of a tension rod assembly for fixing the tension rod.

[0022] The upper part of the above-mentioned hillside washer may have a flat surface area formed so that the lower part of the above-mentioned tension rod assembly is stably supported.

[0023] The above-mentioned fluid support may further include a separator formed to suppress heat transfer by being installed between the hillside washer and the second support body so as to be received in the receiving groove.

[0024] The fuel tank support system further includes a tension rod assembly coupled to the tension rod to restrict the longitudinal movement of the tension rod, and the lower end of the tension rod assembly may be supported by the upper end of the movable support.

[0025] The tension rod assembly comprises a nut coupled to the tension rod and a heat suppression washer formed at the lower part of the nut to suppress heat transfer, and may be formed so that the upper part of the heat suppression washer contacts the upper part of the flow support.

[0026] A support system for supporting the inner tank while spaced apart from the outer tank, provided in a fuel tank including an inner tank and an outer tank according to another embodiment of the present invention, comprises: a fixed support fixedly coupled to a predetermined position of the outer tank and having an inner space formed therein; a movable support received in the inner space and formed to move in conjunction with a tension rod in the inner space, with its upper end protruding upward relative to the upper end of the fixed support; the tension rod penetrating the fixed support and the movable support in the longitudinal direction of the fuel tank and having a connecting device formed at one end that connects to the inner tank; and a tension rod assembly coupled to the tension rod to restrict the movement of the tension rod in the longitudinal direction, wherein the lower end of the tension rod assembly is supported by the upper end of the movable support.

[0027] A fuel tank according to an embodiment of the present invention comprises an inner tank, an outer tank, and a support system for supporting the inner tank while spaced apart from the outer tank. The support system comprises a fixed support fixedly coupled to a predetermined position of the outer tank and having an inner space formed therein, a movable support accommodated in the inner space and formed to move in conjunction with a tension rod in the inner space, and a tension rod penetrating the fixed support and the movable support in the longitudinal direction of the fuel tank and having a connecting device formed at one end for connecting to the inner tank.

[0028]

[0029] According to an embodiment of the present invention, by allowing a movable support to move within a fixed support with a certain degree of freedom, it is possible to prevent the support system from bending excessively due to an excessive load even during external impact or movement. Furthermore, this effect can be doubled by forming an incision surface in the fixed support.

[0030] In addition, by providing a heat suppression washer in the separator and / or tension rod assembly within the flow support, the effect of minimizing heat ingress into the inner tank through the support system is achieved.

[0031]

[0032] A brief description of each drawing is provided to help to better understand the drawings cited in the detailed description of the invention.

[0033] FIGS. 1a and FIGS. 1b show an example of a fuel tank according to an embodiment of the present invention.

[0034] FIG. 2 shows an exploded view of a fuel tank support system according to one embodiment of the present invention.

[0035] FIG. 3 is a drawing for explaining the support body of a fixed support according to an embodiment of the present invention.

[0036] FIG. 4 is a drawing for explaining the cover of a fixed support according to an embodiment of the present invention.

[0037] FIG. 5 is a drawing for explaining a hillside washer of a flow support in an embodiment of the present invention.

[0038] FIGS. 6 and 7 are drawings for explaining a heat transfer path according to a fuel tank support system according to an embodiment of the present invention.

[0039] FIG. 8 is a drawing illustrating the degree of heat transfer through a fuel tank support system according to an embodiment of the present invention.

[0040]

[0041] The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention. In describing the present invention, detailed descriptions of related prior art are omitted if it is determined that such detailed descriptions may obscure the essence of the present invention.

[0042] Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0043] The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise.

[0044] In this specification, terms such as “comprising” or “having” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0045] Hereinafter, the present invention will be described in detail with reference to the attached drawings, focusing on embodiments of the invention. Identical reference numerals in each drawing indicate identical components.

[0046] FIGS. 1a and FIGS. 1b show an example of a fuel tank according to an embodiment of the present invention.

[0047] Referring to FIG. 1a and FIG. 1b, a fuel tank (1) to which a fuel tank support system (100) according to an embodiment of the present invention is applied comprises an outer tank (10), an inner tank (20), and a fuel tank support system (100) for supporting the inner tank (20).

[0048] Although the fuel tank support system (100) is illustrated in FIG. 1a and FIG. 1b as an example having three units, more or fewer fuel tank support systems (100) than three may be provided on the fuel tank (1) as long as they are stably supported while maintaining the balance of the inner tank (20).

[0049] The above fuel tank support system (100) may have a fixed support and a movable support, which will be described later, installed at a predetermined location of the outer tank (10), and the tension rod may be installed so as to be able to move to a certain extent inside the fixed support.

[0050] The fixed support and movable support may be installed at a predetermined location among a plurality of horizontal frames installed to support the frame of the outer tank (10) as shown in FIG. 1a, but may also be installed at the lowest horizontal frame, or at any predetermined horizontal frame even if it is not the highest or lowest. Alternatively, even if it is not a horizontal frame, the fixed support and movable support may be installed at any location on the outer tank (10) where they can be stably installed.

[0051] One end of the tension rod protrudes above the fixed support, and the other end may be equipped with a predetermined device for connecting to the inner tank (20). The tension rod can perform the function of supporting the inner tank (20) while spaced apart from the outer tank (10) by applying a constant tension to the inner tank (20). Any method may be used for the device formed at one end of the tension rod for connecting to the inner tank (20), i.e., the connecting device, as long as it is configured to be attached to or coupled to the inner tank (20) to stably support the inner tank (20).

[0052] When the fixed support is fixedly coupled to the outer tank (10), the movable support can move within the inner space formed inside the fixed support. The tension rod can be formed to move in conjunction with the movable support. Accordingly, the tension rod is formed to move with a certain degree of freedom, and thus, even if an external shock is transmitted, it is possible to maintain the balance of the inner tank while preventing the tension rod from being damaged by an excessive load. Furthermore, this effect may be even more effective when the fuel tank (1) is moved via a means of transportation.

[0053] In addition, as described below, the above-described flow support may be equipped with a separator to block heat suppression, and the tension rod assembly as described below may also be equipped with a heat suppression washer. Thus, the heat conduction of heat flowing in from the outer tank (10) and / or heat flowing in from the top of the tension rod can be effectively suppressed to the maximum extent.

[0054] The specific configuration of the fuel tank support system (100) according to an embodiment of the present invention for such technical ideas will be described in detail with reference to FIG. 2.

[0055] FIG. 2 shows an exploded view of a fuel tank support system according to one embodiment of the present invention.

[0056] A fuel tank support system (100) according to an embodiment of the present invention includes a fixed support (110), a movable support (120), and a tension rod (130) as shown in FIG. 2 (not shown in FIG. 2, but shown in FIG. 6 and FIG. 7). In addition, the fuel tank support system (100) may further include a tension rod assembly (140).

[0057] The fixed support (110) is fixedly coupled to a predetermined position of the outer tank (10) (e.g., the uppermost horizontal frame of the outer tank (10)) and may have an inner space formed inside. The horizontal frame may be installed in multiple numbers to maintain the skeleton of the outer tank (10) and may be formed to have a certain step toward the inner tank (20). The fixed support (110) may be installed on this step, but as previously mentioned, the position may be any location as long as the fixed support (110) can be stably coupled thereto. Additionally, as described below, the fixed support (110) may be directly coupled to the horizontal frame (11), but in order to withstand downward pressure applied from the fixed support (110) more stably, a predetermined reinforcing frame (13 in FIG. 6 and FIG. 7) may be installed on the horizontal frame (11), and the fixed support (110) may be fixedly coupled to the reinforcing frame (13).

[0058] The above-mentioned fluid support (120) can be implemented to be accommodated in the inner space of the above-mentioned fixed support (110) and to move in conjunction with the tension rod (130) in the inner space.

[0059] And the tension rod (130) penetrates the fixed support (110) and the movable support (120) in the longitudinal direction (e.g., up and down direction in FIG. 1) of the fuel tank (1), and a connecting device for connecting to the inner tank (20) may be formed at one end. The connecting device is connected to the inner tank (20), and through this, the tension rod (130) can support the inner tank (20) while being spaced apart from the outer tank (10). In addition, the other end of the tension rod (130) may be installed protruding above the upper part of the fixed support (110).

[0060] The above fixed support (110) may have a first support body (111) and a first cover (112).

[0061] When the first support body (111) and the first cover (112) are combined, a predetermined space, i.e., an inner space, can be formed inside the fixed support (110), and a movable support (120) can be accommodated in the inner space.

[0062] The first support body (111) is fixedly coupled to the outer tank (10) and is implemented so that the tension rod can pass through it, and may have a shape that is hollowed out from the top to a certain depth so as to form the inner space.

[0063] And the first cover (112) is fixedly coupled to the upper edge of the support body (111) through predetermined coupling means (113). And a predetermined through-hole structure may be formed inside the first cover (112) through which the tension rod (130) can pass.

[0064] The structure of the first support body (111) and the first cover (112) will be explained in more detail with reference to FIGS. 3 and FIGS. 4.

[0065] FIG. 3 is a drawing for explaining the support body of a fixed support according to an embodiment of the present invention, and FIG. 4 is a drawing for explaining the cover of a fixed support according to an embodiment of the present invention.

[0066] First, as illustrated in FIGS. 3a and 3b, a round groove may be formed inside the first support body (111) to have a predetermined depth from the top, thereby forming an inner space (111-1) in which the fluid support (120) can be accommodated. Additionally, a through hole may be formed in the lower part of the first support body (111) so that the tension rod (130) can pass through.

[0067] As shown in FIGS. 3A and 3B, the inner space (111-1) may have a curved lower section with the deepest depth in the center and a decreasing depth towards the edge. Additionally, the outer wall of the inner space (111-1) may be implemented in a vertical or near-vertical shape. Furthermore, the lower section of the fluid support (120) may also be implemented to have the same or a similar shape as the lower section of the inner space (111-1).

[0068] Accordingly, the above-mentioned fluid support (120) is formed with a left-right width smaller than that of the inner space (111-1), and thus can move within the inner space (111-1) with a certain degree of freedom in the horizontal direction. In addition, since the lower part of the inner space (111-1) and the lower part of the fluid support (120) may have a curved shape as described above, when the fluid support (120) moves toward the edge of the inner space (111-1), it can also have a certain degree of freedom in the vertical direction.

[0069] Meanwhile, according to one embodiment, the support body (111) may simply have a tension rod (130) passing through the lower center and may only have a through hole larger than the diameter of the tension rod (130), but may also have an incision (111-2) formed as shown in FIG. 3a and FIG. 3b.

[0070] The above-mentioned incision (111-2) may be formed to have a width equal to or greater than the width of the tension rod (130) from the center of the first support body (111) outward. Accordingly, the tension rod (130) may be formed to be able to move along the incision (111-2).

[0071] And the above-mentioned cut portion (1111-2) can be installed so as to face the direction of the inner tank (20), more specifically the direction of the center of the inner tank (20), when the above-mentioned fixed support (110) is installed on the outer tank (10). This allows the inner tank (20) to not rotate according to the movement of the tension rod (130) and to apply force only in the direction of the center of the inner tank (20), thereby maintaining the balance of the inner tank (20).

[0072] Additionally, as shown in FIG. 4, the first cover (112) can form a through-structure inwardly, through which the tension rod (130) can pass through the through-structure and the fluid support (120) can be positioned to protrude above the through-structure.

[0073] As illustrated in FIG. 4, the above through-hole structure may be characterized by having at least one circular through-hole (112-1) formed in the center of the first cover and an extended through-hole groove (112-2) formed extending outward from the edge of the through-hole, having a width equal to or greater than the diameter of the tension rod (130). FIG. 4 illustrates an example in which four extended through-hole grooves (112-2) are formed at 90-degree intervals, but it is understood that more or fewer may be formed as needed. Furthermore, these extended through-hole grooves (112-2) may have the effect of guiding the tension rod (130) to flow further in a predetermined specific direction, that is, in the direction in which the extended through-hole groove (112-2) is formed.

[0074] Referring again to FIG. 2, the fluid support (120) includes a second support body (121), a hillside washer (122), and a second cover (123). Additionally, a separator (124) may be further provided between the second support body (121) and the hillside washer (122) to suppress heat transfer.

[0075] The above-mentioned movable support (120) may be formed with a width smaller than that of the inner space (111-1) so that it can move freely within the inner space (111-1) of the fixed support (110), and the height of the second support body (121) of the movable support (120) may be formed smaller than the height of the inner space (111-1). In addition, the movable support (120) may move in conjunction with the tension rod (130). Of course, the horizontal movement of the movable support (120) may be restricted by the outer wall of the inner space (111-1), and the vertical movement may be restricted by the first cover (112) of the fixed support (110), and the movement may also be restricted in one direction by the cut portion (111-2) as described above.

[0076] As shown in FIG. 2, the second support body (121) may be formed to be received in the inner space (111-1) and to be able to move in contact within the inner space (111-1) of the fixed support (110). Additionally, a receiving groove formed to a certain depth may be formed inside the second support body (121).

[0077] As described above, the left and right width of the second support body (121) may be smaller than that of the inner space (111-1), and the height of the second support body (121) may also be formed smaller than that of the inner space (111-1), thereby creating a horizontal or vertical gap through which the second support body (121) can move within the inner space (111-1). Additionally, the lower part of the second support body (121) may have a curved shape that is identical or similar to the lower part of the inner space (111-1). Of course, a predetermined through hole through which the tension rod (130) can pass may be formed in the lower part of the second support body (121).

[0078] According to one example, the lower portion of the hillside washer (122) may be received in the receiving groove of the second support body (121). At this time, the receiving groove of the second support body (121) and the lower portion of the hillside washer (122) are formed to have no or almost no gap, so that the hillside washer (122) can move in conjunction with the movement of the second support body (121). The hillside washer (122) is formed to have a hillside having a certain height on both sides, and the upper portion of the hillside washer (122) may be formed to support the lower portion of the tension rod assembly (140).

[0079] According to another example, as illustrated in FIG. 2, a separator (124) may be further provided between the hillside washer (122) and the second support body (121) to prevent heat transfer. In this case, a receiving groove may be formed on the inner side of the separator (124) to accommodate a lower portion of the hillside washer (122), and a lower portion of the hillside washer (122) may be accommodated in the receiving groove. Furthermore, the receiving groove of the separator (124) and the hillside washer (122) may be formed with little to no gap, and even when the separator (124) is accommodated in the receiving groove of the second support body (121), they may be formed with little to no gap, thereby allowing the hillside washer (122) to move in conjunction with the movement of the second support body (121).

[0080] The above separator (124) can perform the function of suppressing heat transfer from the outside to the inner tank (20) by being formed of a material with particularly high thermal resistance (e.g., G10), and it goes without saying that the material and implementation example of the separator (124) may vary depending on the embodiment.

[0081] The above-mentioned hillside washer (122) may be formed such that, when the above-mentioned movable support (120) is assembled, its upper end protrudes above the upper end of the second cover (123) and the fixed support (110), that is, above the first cover (112). And the lower end of a tension rod assembly (140) for linking the movement of the tension rod (130) and the hillside washer (122) may come into contact with the upper end of the hillside washer (122) that protrudes above the first cover (112). That is, the upper end of the hillside washer (122) can support the lower end of the tension rod assembly (140).

[0082] A specific embodiment of such a hillside washer (122) will be described with reference to FIG. 5.

[0083] FIG. 5 is a drawing for explaining a hillside washer of a fluid support in an embodiment of the present invention. As shown in FIG. 5, the hillside washer (122) may include a lower plate (122-1) and a washer portion (122-2) formed on the upper part of the lower plate (122-1). As shown, the washer portion (122-2) has a hillside having a certain height on both sides and a through hole formed long in the longitudinal direction (left-right direction in FIG. 5), so that the tension rod (130) can move relatively widely in the longitudinal direction, and movement in the width direction (depth direction in FIG. 5) can be restricted.

[0084] In addition, the hillside washer (122) according to an embodiment of the present invention may be provided with a flatly formed flat area (122-3) as shown on the top of the hillside, and the bottom of the tension rod assembly (140) may be stably supported by this flat area (122-3).

[0085] Referring again to FIG. 2, the second cover (123) fixes the hillside washer (122) downward, and for this purpose, a through hole is formed inside having a width that allows the lower plate (122-1) of the hillside washer (122) to pass through, while allowing the upper part of the washer part (122-2) to pass through. The second cover (123) can be joined to the upper edge of the second support body (121) through predetermined fixing means (125).

[0086] The tension rod assembly (140) may be configured to be coupled to the tension rod (130) to restrict the longitudinal movement of the tension rod (130), and for this purpose may include a nut (141) and a heat-inhibiting washer (142). Additionally, depending on the embodiment, a metal washer (143) may be further included.

[0087] Typically, a washer is a component installed to enhance the fastening performance of a fault or nut, and the heat suppression washer (142) can be provided to suppress heat transfer through a material with high thermal resistance while performing the function of a washer. The heat suppression washer (142) can also be implemented with a material with high thermal resistance (e.g., G10). Additionally, since a material with high thermal resistance has low strength and may be vulnerable to breakage, a metal washer (143) may be additionally provided between the nut (141) and the heat suppression washer (142).

[0088] Additionally, the diameter of the internal through hole of the heat suppression washer (142) and / or the metal washer (143) can be implemented to be larger than the diameter of the tension rod (130). Through this, the tension rod (130) and the heat suppression washer (142) and / or the metal washer (143) can be implemented to be fixed without directly contacting the tension rod (130), thereby allowing the heat transfer path to be extended as described below. Of course, if the tension rod (130) moves due to external impact or the like, it may temporarily come into direct contact with the heat suppression washer (142) and / or the metal washer (143), but when the tension rod (130) is fixed, the heat suppression washer (142) and / or the metal washer (143) can be implemented to be fixed without contact.

[0089] The metal washer (143) may be made of a material with high strength, such as steel, but is not limited thereto. Additionally, according to the embodiment, the components excluding the separator (124) and the heat suppression washer (142) may be made of a metal material with high strength (e.g., steel), but are not limited thereto.

[0090] In any case, the tension rod assembly (140) may include a nut (141) coupled (e.g., screwed) to the tension rod (130), a heat suppression washer (142) formed at the bottom of the nut (141) and formed to suppress heat transfer, and may be formed so that the heat suppression washer (142) and the top of the flow support (120), i.e., the top of the heel-side washer (122), come into contact.

[0091] Then, the movement of the tension rod (130) in the longitudinal direction downward can be restricted by the tension rod assembly (140), and since the tension rod assembly (140) is supported in contact with the upper end of the fluid support (120), the tension rod (130) can move in conjunction with the movement of the fluid support (120).

[0092] The combined form of such a fuel tank support system (100) and the heat transfer path through it will be explained with reference to FIGS. 6 and FIGS. 7.

[0093] FIGS. 6 and 7 are drawings for explaining a heat transfer path according to a fuel tank support system according to an embodiment of the present invention.

[0094] First, as illustrated in FIG. 6, the fixed support (110) can be fixedly coupled to a reinforcing frame (13) installed on the horizontal frame (11) of the outer tank (10), and a movable support (120) can be accommodated in the inner space (111-1) of the fixed support (110). And the upper part of the movable support (120) (i.e., the upper part of the hillside washer (122)) may protrude above the first cover (112) of the fixed support (110), and the lower end of the tension rod assembly (140) coupled with the tension rod (130) (i.e., the heat suppression washer (142)) may be supported by the upper end of the movable support (120).

[0095] And since the width of the fluid support (120) is smaller than the width of the inner space (111-1), the fluid support (120) is given a degree of freedom to move in the horizontal direction (direction ①), and the height of the second support body (121) of the fluid support (120) is smaller than the height of the inner space (111-1), and the lower part of the inner space (111-1) is shaped like a rounded groove (i.e., a shape that is deep in the center and becomes shallower towards the edge), so the fluid support (120) is given a degree of freedom to move in the vertical direction (direction ②).

[0096] In addition, since the movable support (120) is not coupled with the fixed support (110), it can be rotated in the inner space (111-1), and in this case, a degree of freedom can be granted to the movement of the movable support (120) in the rotation direction (3 direction). Of course, in this case, rotation may be restricted depending on whether the connecting device connecting the tension rod (130) and the inner tank (20) is structured to allow rotation.

[0097] Additionally, the tension rod (130) may be in direct contact with the components of the fixed support (110) and the components of the fluid support (120) through a through hole, but such contact may occur only when the fluid support (120) is moving. However, when the fluid support (120) is fixed, the width of the through holes of the components of the fixed support (110) and the fluid support (120) may be formed larger than the diameter of the tension rod (130) so that it does not come into direct contact with the tension rod (130), and in this case, the heat transfer path may be extended significantly.

[0098] For example, the heat transfer path from the outer tank (10) to the inner tank (20) may have a path that passes through the horizontal frame (11), reinforcing frame (13), first support body (111), second support body (121), separator (124), hillside washer (122), heat suppression washer (142), metal washer (143), and nut (141) of the outer tank (10), as shown by the red arrow. In this case, since it passes through the separator (124) and heat suppression washer (142) that suppress heat transfer, heat transfer can be greatly suppressed.

[0099] Additionally, as shown in FIG. 7, heat inflow from the outside can also occur from the top of the tension rod (130). In this case, heat transfer can occur directly from the top to the bottom of the tension rod (130), but since the heat inflow from the outer tank (10), which has a relatively large surface area, is much larger, the heat inflow effect may be relatively small.

[0100] In addition, as illustrated in FIG. 7, an average expert in the art of the present invention will be able to easily deduce that the reinforcing frame (13) can also have an incision formed in the same direction as the incision of the first support body (111).

[0101] FIG. 8 is a drawing illustrating the degree of heat transfer through a fuel tank support system according to an embodiment of the present invention.

[0102] FIG. 8 illustrates the result of repeatedly simulating the amount of heat transfer through the tension rod (130) when the external temperature, for example, the fixed support (110) is 300K and the connecting device (131) in contact with the inner tank (20) is 23K. As shown in FIG. 8, it can be confirmed that only about 0.794W of heat is transferred in the end, and consequently, it can be seen that heat transfer is very effectively suppressed.

[0103] A fuel tank support system (100) according to the technical concept of the present invention and a fuel tank (1) to which the fuel tank support system (100) is applied may be applied to store cryogenic liquids such as liquid hydrogen, but is not limited thereto and may be used to store fuel at a relatively low temperature.

[0104] The foregoing description of the present invention is for illustrative purposes only, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical spirit or essential features of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single unit may be implemented in a distributed manner, and components described as distributed may likewise be implemented in a combined form. The scope of the present invention is defined by the claims set forth below rather than by the detailed description above, and all modifications or variations derived from the meaning and scope of the claims and their equivalents should be interpreted as being included within the scope of the present invention.

[0105]

[0106] The present invention can be used in a fuel tank support system and a fuel tank.

Claims

1. A support system provided in a fuel tank comprising an inner tank and an outer tank, for supporting the inner tank while spaced apart from the outer tank, A fixed support fixedly coupled to a predetermined position of the above-mentioned outer tank and having an inner space formed therein; A fluid support formed to be accommodated in the inner space and to move in conjunction with a tension rod in the inner space; A fuel tank support system comprising a tension rod that penetrates the fixed support and the movable support in the longitudinal direction of the fuel tank and has a connecting device formed at one end for connecting to an inner tank.

2. In paragraph 1, the fixed support is, A first support body fixedly coupled to the outer tank and having an inner space formed so that the tension rod can pass through; A fuel tank support system comprising a first cover fixedly coupled to the upper edge of the support body and having a predetermined through-hole structure formed therein through which the tension rod can pass.

3. In paragraph 2, the above-mentioned penetration structure is, A fuel tank support system characterized by having a circular through hole in the center of the cover and at least one extended through groove formed extending outward from the edge of the through hole, having a width equal to or greater than the diameter of the tension rod.

4. In paragraph 2, the inner space is, A fuel tank support system formed to have a curved lower section with the deepest depth in the center and decreasing depth towards the rim.

5. In paragraph 2, the first support body is, An incision is formed extending outward from the center of the first support body, having a width equal to or greater than the width of the tension rod, so that the tension rod can move along the incision. A fuel tank support system characterized by the fixed support being installed so that the above-mentioned cut portion faces toward the inner tank.

6. In paragraph 1, the above-mentioned fluid support is, A second support body that is received in the inner space and formed to be able to move in contact within the inner space of the fixed support, and has a receiving groove formed to a certain depth inside; A hillside washer formed such that a lower portion is received in the receiving groove of the second support body and has hillsides having a certain height on both sides; A fuel tank support system comprising a second cover having a through hole formed inside to fix the hillside washer downward and coupled to the upper edge of the second support body.

7. In paragraph 6, the hillside washer is, The top is formed to protrude upward relative to the top of the fixed support, and A fuel tank support system formed at the top of the above hillside washer to support the lower end of a tension rod assembly for fixing the tension rod.

8. In Paragraph 7, the upper part of the hillside washer is, A fuel tank support system in which a flat planar area is formed so that the lower end of the above tension rod assembly is stably supported.

9. In paragraph 6, the above-mentioned fluid support is, A fuel tank support system further comprising a separator formed to suppress heat transfer by being installed between the hillside washer and the second support body so as to be received in the receiving groove.

10. In paragraph 6, the fuel tank support system is, It further includes a tension rod assembly coupled to the tension rod to restrict the movement of the tension rod in the longitudinal direction, The above tension rod assembly is, A fuel tank support system in which the lower end is supported by the upper end of the above-mentioned fluid support.

11. In Clause 10, the tension rod assembly is, A nut coupled to the above tension rod; A fuel tank support system comprising a heat suppression washer formed at the lower part of the nut and formed to suppress heat transfer, wherein the heat suppression washer and the upper part of the flow support are formed to be in contact.

12. A support system provided in a fuel tank comprising an inner tank and an outer tank, for supporting the inner tank while spaced apart from the outer tank, A fixed support fixedly coupled to a predetermined position of the above-mentioned outer tank and having an inner space formed therein; A movable support that is accommodated in the inner space and formed to move in conjunction with a tension rod in the inner space, with its upper end protruding upward relative to the upper end of the fixed support; The tension rod, which penetrates the fixed support and the movable support in the longitudinal direction of the fuel tank and has a connecting device formed at one end that is connected to the inner tank; and It includes a tension rod assembly coupled to the tension rod to restrict the movement of the tension rod in the longitudinal direction, The above tension rod assembly is, A fuel tank support system in which the lower end is supported by the upper end of the above-mentioned fluid support.

13. Internal tank; External tank; and It includes a support system for supporting the inner tank while spaced apart from the outer tank, The above support system is, A fixed support fixedly coupled to a predetermined position of the above-mentioned outer tank and having an inner space formed therein; A fluid support formed to be accommodated in the inner space and to move in conjunction with a tension rod in the inner space; A fuel tank comprising a tension rod that penetrates the fixed support and the movable support in the longitudinal direction of the fuel tank and has a connecting device formed at one end for connecting to an inner tank.

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