TUBE FOR TRANSPORTATION SYSTEM AND MANUFACTURING METHOD THEREOF

Abstract

 A tube for a transportation system is disclosed. A tube for a transportation system according to an embodiment may include: a tube body provided as a rectangular steel pipe to provide a traveling path for a traveling body traveling under a pressure condition lower than atmospheric pressure; a plurality of skin panels coupled to respective sides of a circumference of the tube body by having a curvature to form an arch shape; and a panel reinforcement member coupled to an inner surface of the skin panel.

Description

[Technical Field]

[0001] The present disclosure relates to a tube for a transportation system provided to provide a traveling path for a traveling body in a transportation system that moves the traveling body under a low-pressure condition, and manufacturing method thereof.

[Background Art]

[0002] Recently, transportation systems designed to allow a traveling body to travel at high speed under low-pressure conditions have emerged.

[0003] In such a high-speed transportation system, two types of resistance are handled depending on the speed. One is to design an aerodynamic traveling body to reduce air resistance that increases exponentially, and the other is to apply a magnetic levitation system to reduce friction between the traveling body and a track.

[0004] A technology introduced for this purpose is a Hyperloop device. Such a Hyperloop device refers to a system that transports a moving vehicle by magnetic levitation within a tube sealed in a state of about 0.001 atm or less.

[0005] In such a Hyperloop device, electromagnetic and mechanical systems are important, but it is most important to implement a tube structure for maintaining a sub-vacuum state of about 0.001 atm or less, which accounts for about 50% or more of initial investment costs.

[Disclosure]

[Technical Problem]

[0006] An aspect of the present disclosure is to provide a tube for a transportation system capable of lightweighting while securing stable strength, and a method for manufacturing the same.

[0007] An aspect of the present disclosure is to provide a tube for a transportation system capable of preventing an excessive increase in weight in response to an expansion of an internal cross-sectional area forming a traveling path of a traveling body, and a method for manufacturing the same.

[0008] An aspect of the present disclosure is to provide a tube for a transportation system capable of solving transport problems for construction in response to an expansion of an internal cross-sectional area forming a traveling path of a traveling body, and a method for manufacturing the same.

[Technical Solution]

[0009] A tube for a transportation system according to an aspect of the present disclosure may include: a tube body provided as a rectangular steel pipe to provide a traveling path for a traveling body traveling under a pressure condition lower than atmospheric pressure; a plurality of skin panels coupled to respective sides of a circumference of the tube body by having a curvature to form an arch shape; and a panel reinforcement member coupled to an inner surface of the skin panel.

[0010] The panel reinforcement member may include a first panel reinforcement member supporting the inner surface of the skin panel along a circumferential direction of the tube body.

[0011] A plurality of the first panel reinforcement members may be spaced apart along a longitudinal direction of the tube body.

[0012] The first panel reinforcement member may continuously support the inner surface of the skin panel along the circumferential direction of the tube body.

[0013] The first panel reinforcement member may include an arc-shaped reinforcement member taking an arc form such that an outer circumferential surface thereof comes into close contact with the inner surface of the skin panel.

[0014] The first panel reinforcement member may include a bow-shaped reinforcement member taking a bow shape in which a circumferential surface has a curved portion and a flat portion, and coming into close contact with the inner surface of the skin panel through the curved portion.

[0015] The first panel reinforcement member may include: an arc-shaped reinforcement member taking an arc form such that an outer circumferential surface thereof comes into close contact with the inner surface of the skin panel; and a bow-shaped reinforcement member taking a bow shape in which a circumferential surface has a curved portion and a flat portion, and coming into close contact with the inner surface of the skin panel through the curved portion, wherein the bow-shaped reinforcement member may be disposed at least at both ends of the skin panel in the longitudinal direction of the tube body.

[0016] The panel reinforcement member may further include a second panel reinforcement member supporting the inner surface of the skin panel along the longitudinal direction of the tube body.

[0017] A plurality of the second panel reinforcement members may be spaced apart along the circumferential direction of the tube body.

[0018] The second panel reinforcement member may be provided to support between the first panel reinforcement members.

[0019] The tube for a transportation system may further include a tube reinforcement member coupled to an outer surface of the tube body.

[0020] The tube reinforcement member may include a first tube reinforcement member supporting the outer surface of the tube body along the circumferential direction of the tube body.

[0021] A plurality of the first tube reinforcement members may be spaced apart along the longitudinal direction of the tube body.

[0022] The tube reinforcement member may further include a second tube reinforcement member supporting the outer surface of the tube body along the longitudinal direction of the tube body.

[0023] A plurality of the second tube reinforcement members may be spaced apart along the circumferential direction of the tube body.

[0024] The rectangular steel pipe may be selected from any one of a rectangular steel pipe having a square cross-section and a rectangular steel pipe having a rectangular cross-section.

[0025] A tube for a transportation system according to an aspect of the present disclosure may include: a tube body provided as a rectangular steel pipe to provide a traveling path for a traveling body traveling under a pressure condition lower than atmospheric pressure; a plurality of skin panels coupled to respective sides of a circumference of the tube body by having a curvature to form an arch shape; and a plurality of panel reinforcement members coupled to inner surfaces of the skin panels to form a lattice structure.

[0026] A method for manufacturing a tube for a transportation system, the method comprising: preparing a rectangular tube body for providing a traveling path for a traveling body traveling under a pressure condition lower than atmospheric pressure, a plurality of skin panels to be coupled to respective sides of a circumference of the tube body, and a panel reinforcement member for reinforcing the skin panel; reinforcing the skin panels by coupling the panel reinforcement member to an inner surface of each of the skin panels; and coupling the plurality of skin panels, to which the panel reinforcement member is coupled, to the respective sides of the circumference of the tube body.

[0027] The method for manufacturing a tube for a transportation system may further include transporting performed between the reinforcing and the coupling, wherein the skin panel coupled with the panel reinforcement member and the tube body are transported to a construction site for construction of the tube for a transportation system in the transporting, and the coupling is performed at the construction site.

[Advantageous Effects]

[0028] According to an aspect of the present disclosure, it is possible to provide a tube for a transportation system capable of lightweighting while securing stable strength, and a method for manufacturing the same.

[0029] According to an aspect of the present disclosure, it is possible to provide a tube for a transportation system capable of preventing an excessive increase in weight in response to an expansion of an internal cross-sectional area forming a traveling path of a traveling body, and a method for manufacturing the same.

[0030] According to an aspect of the present disclosure, it is possible to provide a tube for a transportation system capable of solving transport problems for construction in response to an expansion of an internal cross-sectional area forming a traveling path of a traveling body, and a method for manufacturing the same.

[Description of Drawings]

[0031] 

FIG. 1 shows a state in which tubes for a transportation system according to an embodiment of the present disclosure are connected.

FIG. 2 is an exploded perspective view of a tube for a transportation system according to an embodiment of the present disclosure.

FIG. 3 is a cross-sectional view of a tube for a transportation system according to an embodiment of the present disclosure.

FIG. 4 is an enlarged perspective view illustrating a structure of a skin panel to which a panel reinforcement member is coupled in the tube for a transportation system according to an embodiment of the present disclosure.

FIG. 5 is a cross-sectional view of a skin panel to which a panel reinforcement member is coupled in the tube for a transportation system according to an embodiment of the present disclosure.

FIG. 6 shows steps for performing a method for manufacturing a tube for a transportation system according to an embodiment of the present disclosure.

FIG. 7 shows a tube body of a tube for a transportation system according to another embodiment of the present disclosure.

FIG. 8 is a cross-sectional view of the tube for a transportation system shown in FIG. 7.

FIG. 9 is an enlarged view of part A of FIG. 7.

FIG. 10 is a plan view of the tube for a transportation system shown in FIG. 7.

[Mode for Invention]

[0032] Throughout the specification, the same reference numerals refer to the same components. The present specification does not describe all elements of the embodiments, and overlaps between general contents or embodiments in the technical field to which the present disclosure belongs are omitted. Terms such as 'part, module, member, block' used in the specification may be implemented as software or hardware, and a plurality of 'parts, modules, members, blocks' may be implemented as a single component, or a single 'part, module, member, block' may include a plurality of components according to embodiments.

[0033] Throughout the specification, when a part is referred to as being "connected" to another part, this includes not only a case where it is directly connected but also a case where it is indirectly connected, and the indirect connection includes connecting through a wireless communication network.

[0034] Also, when a part is referred to as "including" a certain component, this means that it may further include other components rather than excluding other components unless specifically stated to the contrary.

[0035] Throughout the specification, when a member is located "on" another member, this includes not only a case where a member is in contact with another member but also a case where another member exists between the two members.

[0036] Terms such as first, second, etc. are used to distinguish one component from another component, and the component is not limited by the above-mentioned terms.

[0037] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0038] In each step, an identification code is used for convenience of description, and the identification code does not describe the order of each step, and each step may be performed differently from the specified order unless the context clearly states a specific order.

[0039] Hereinafter, the operating principle and embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0040] For reference, FIG. 1 shows a state in which tubes for a transportation system according to an embodiment are connected, FIG. 2 is an exploded perspective view of a tube for a transportation system according to an embodiment, and FIG. 3 shows a cross-sectional view of a tube for a transportation system according to an embodiment. Also, FIG. 4 is an enlarged perspective view illustrating a structure of a skin panel to which a panel reinforcement member is coupled in a tube for a transportation system according to an embodiment, and FIG. 5 shows a cross-sectional view of a skin panel to which a panel reinforcement member is coupled in a tube for a transportation system according to an embodiment.

[0041] As shown in FIGS. 1 to 5, a tube 1 for a transportation system (hereinafter, tube) includes a tube body 10.

[0042] The tube body 10 may provide a traveling path for a traveling body of a transportation system. The traveling path of the traveling body may be provided through an internal space 10a of the tube body 10.

[0043] A guide rail is installed inside the tube body 10, and the traveling body may travel at high speed along the tube 1 in a state of being magnetically levitated from the guide rail by a magnetic force formed between the traveling body and the guide rail.

[0044] Here, the high speed may refer to a speed of 300 km/h or more or 700 km/h or more, but is not limited thereto.

[0045] In the transportation system, a magnetic levitation method is applied to reduce frictional resistance, which is one of traveling resistances, and inside the tube body 10, attractive force and repulsive force of a magnetic field are periodically and precisely converted to maintain a constant distance between the guide rail and the traveling body, thereby maintaining a state where the traveling body is magnetically levitated.

[0046] The inside of the tube body 10 maintains a low-pressure state so that air resistance is reduced when the traveling body travels.

[0047] The pressure inside the tube body 10 may be a pressure close to vacuum. Assuming that the pressure outside the tube is an atmospheric pressure of 1 atm (about 101 kPa, 1 bar), the pressure inside the tube body 10 may be about less than 10 kPa (0.1 bar).

[0048] The internal pressure of the tube body 10 is not limited thereto. The inside of the tube body 10 may be 1 kPa (0.01 bar or 10 mbar), 500 Pa (5 mbar), 200 Pa (2 mbar), or 100 Pa (1 mbar), and may also include cases of lower pressure.

[0049] Hereinafter, the internal pressure of the tube body 10 will be described based on about 100 Pa (1 mbar), which is 0.001 atm, but the inside of the tube body 10 may be provided within various pressure ranges including the above-described pressure values within a range relatively less than atmospheric pressure.

[0050] In such a transportation system, a system for levitating and propelling the system electromagnetically or mechanically is important, but it is important to implement the tube 1 for maintaining a vacuum state corresponding to 0.001 atm or less or a state equivalent to vacuum in infrastructure accounting for 50% or more of initial investment costs.

[0051] In addition, in the structure of the tube 1 forming a low pressure inside, since not only a bending load but also a differential pressure load due to a pressure difference between the inside and the outside of the tube must be simultaneously considered, a thickness between an inner surface and an outer surface of a steel pipe forming the tube body 10 needs to be increased in order for the tube 1 to secure stable strength.

[0052] Since the tube 1 according to an embodiment is provided such that the skin panel 20 and the panel reinforcement members 30 and 40 are installed on the tube body 10, the tube 1 may stably withstand the bending load and the differential pressure load while reducing the thickness between the inner surface and the outer surface of the tube body 10.

[0053] The tube body 10 may be provided as a rectangular steel pipe. In order for the traveling path of the traveling body to maintain a state of approximately 0.001 atm, it is necessary to strongly suppress an increase in the amount of material in the traveling path. To this end, the tube body 10 needs to be made of a material having a low outgassing rate. Steel materials have excellent yield strength and tensile strength, and have a lower outgassing rate than concrete or polymer composite materials. Therefore, the tube body 10 provided as a steel material ensures rigidity and may be advantageously applied to maintain a sub-vacuum state of the traveling path of the vehicle formed therein.

[0054] As the tube body 10, any one of rectangular steel pipes having a square or rectangular cross-sectional structure may be selected. Therefore, the tube body 10 may have various cross-sectional structures depending on the specifications of the traveling body or the shape of the guide rail compared to a circular steel pipe.

[0055] In addition, the tube body 10 having a rectangular cross-sectional structure has a flat inner bottom surface, which may be advantageously applied to improve workability or work precision due to the installation of the guide rail.

[0056] The skin panel 20 has a curvature to form an arch shape and is coupled to each side of the circumference of the tube body 10, and the panel reinforcement members 30 and 40 may be coupled to the skin panel 20 to support the inner surface of the skin panel 20.

[0057] The skin panel 20 reinforced through the panel reinforcement members 30 and 40 reinforces each side of the tube body 10 composed of a rectangular steel pipe in the thickness direction of the tube body 10, thereby increasing the strength of the tube 1 similar to an overall increase in the thickness of the tube body 10.

[0058] Therefore, the tube 1 may be lightweight by reducing the thickness between the inner surface and the outer surface of the steel pipe constituting the tube body 10, and stiffness corresponding to the reduced thickness of the steel pipe may be supplemented through the skin panel 20 and the panel reinforcement members 30 and 40, thereby securing stable strength overall.

[0059] In addition, since such a tube 1 can be lightweight while securing stable strength, there is no fear that the weight will excessively increase in response to an expansion of the internal cross-sectional area forming the traveling path of the traveling body.

[0060] That is, in the case of existing circular steel pipes constituting the tube, the diameter rarely exceeds 2 m, but in the case of circular steel pipes applied as tubes for passenger or cargo Hyperloop, they may have a diameter of 4 to 5 m. When such a large-diameter circular steel pipe must resist external atmospheric pressure due to internal vacuum rather than internal pressure, the thickness of the steel pipe must be relatively thicker unlike when internal pressure acts, in order to prevent local buckling due to an increase in compressive stress.

[0061] On the other hand, when the internal cross-sectional area of the tube body 10 providing the traveling path of the traveling body is expanded, the tube 1 can prevent local buckling due to an increase in compressive stress through the skin panel 20 and the panel reinforcement members 30 and 40 without excessively increasing the thickness of the steel pipe constituting the tube body 10, so that there is no fear that the weight will excessively increase in response to the expansion of the cross-sectional area inside the tube body 10.

[0062] The skin panel 20 may be provided as a steel plate bent to have a curvature to form an arch shape. The skin panel 20 may be provided as an arched steel plate bent to have a gentle curvature along the circumferential direction of the tube body 10.

[0063] The skin panel 20 may be coupled to the tube body 10 such that both ends in a width direction corresponding to the circumferential direction of the tube body 10 are supported on corner portions of the tube body 10. The skin panel 20 may be coupled to the tube body 10 through welding bonding, or a bonding method using an adhesive or a fastening device.

[0064] The panel reinforcement members 30 and 40 may include a first panel reinforcement member 30 that supports and reinforces the inner surface of the skin panel 20 along the circumferential direction of the tube body 10.

[0065] The first panel reinforcement member 30 reinforcing the inner surface of the skin panel 20 in the circumferential direction of the tube body 10 suppresses inward deformation of the circumference of the skin panel 20 by compressive force caused by external atmospheric pressure, thereby increasing compressive strength of the tube 1 according to compressive load of atmospheric pressure.

[0066] A plurality of the first panel reinforcement members 30 are spaced apart along the longitudinal direction of the tube body 10 so that the reinforcing action of the skin panel 20 by the first panel reinforcement member 30 may be evenly applied to the skin panel 20 along the longitudinal direction of the tube body 10.

[0067] The first panel reinforcement member 30 receives compressive force of atmospheric pressure acting on the skin panel 20 and converts it into tensile force to disperse it, thereby increasing the strength of the tube 1 while preventing the skin panel 20 from locally causing deformation along the circumferential direction of the tube body 10.

[0068] In FIG. 5, solid arrows indicate atmospheric pressure acting on the skin panel 20, and dotted arrows indicate tensile force directions.

[0069] The first panel reinforcement member 30 is provided to continuously support the inner surface of the skin panel 20 along the circumferential direction of the tube body 10 so that the action of dispersing atmospheric pressure may be evenly exerted along the circumferential direction of the tube body 10.

[0070] Therefore, the tube 1 can effectively resist atmospheric pressure even in a state where the thickness of the skin panel 20 is not formed excessively thick, and the thin skin panel 20 can contribute to lightweighting of the tube 1.

[0071] For example, the skin panel 20 may be provided as a thin plate coil such as a hot-rolled coil having a thickness of 6 mm or less. In the case of the hot-rolled coil, mechanical properties are easily secured, and it is advantageous for processing such as bending or roll forming, so that the manufacture of the skin panel 20 subjected to bending processing can be facilitated.

[0072] The first panel reinforcement member 30 may be coupled to the skin panel 20 through welding bonding, or a bonding method using an adhesive or a fastening device.

[0073] The first panel reinforcement member 30 may include at least one of an arc-shaped reinforcement member 31 provided in an arc form and a bow-shaped reinforcement member 32 provided in a bow form.

[0074] The arc-shaped reinforcement member 31 may be provided to take an arc form in which an outer circumferential surface 31a comes into close contact with the inner surface of the skin panel 20. The outer circumferential surface 31a of the arc-shaped reinforcement member 31 has a curvature corresponding to the curvature of the skin panel 20 and may be in close contact with the inner surface of the skin panel 20.

[0075] The bow-shaped reinforcement member 32 takes a bow shape in which circumferential surfaces 32a and 32b have a curved portion 32a and a flat portion 32b, and may be coupled to come into close contact with the inner surface of the skin panel 20 through the curved portion 32a.

[0076] As the bow-shaped reinforcement member 32 is supported on the outer surface of the tube body 10 through the flat portion 32b, the supporting force for the tube body 10 may be increased.

[0077] In addition, since the arc-shaped reinforcement member 31 can reduce material usage compared to the bow-shaped reinforcement member 32, it may be advantageous for lightweighting of the tube 1.

[0078] The tube 1 may provide a traveling path for the traveling body by continuously connecting those provided to have a certain length.

[0079] The skin panel 20 has flange portions 21 at both ends in the longitudinal direction, and the tubes 1 may be coupled and connected to support each other through the flange portions 21.

[0080] The flange portions 21 are coupled to be located radially outward at both ends of the skin panel 20, and the tubes 1 may be coupled through between corresponding flange portions 21.

[0081] Between the flange portion 21 and the skin panel 20 and between the flange portions 21 of the corresponding tubes 1 may be coupled through welding bonding, or a bonding method using an adhesive or a fastening device.

[0082] The first panel reinforcement member 30 may be provided to include the arc-shaped reinforcement member 31 and the bow-shaped reinforcement member 32 together. At this time, by arranging the bow-shaped reinforcement member 32 at least at both ends of the skin panel 20 in the longitudinal direction of the tube body 10, the coupling strength between the tubes 1 may be increased.

[0083] That is, the bow-shaped reinforcement members 32 disposed at both ends of the skin panel 20 are provided on the inner surface of the skin panel 20 corresponding to the positions of the flange portions 21, and upon coupling between the tubes 1, the tubes 1 on both sides may be coupled in a state of being mutually supported through the flange portions 21 located at the ends and the bow-shaped reinforcement members 32. Therefore, the bow-shaped reinforcement member 32 located at the end of the skin panel 20 has a larger surface area compared to the arc-shaped reinforcement member 31 to increase the contact area between the tubes 1, thereby contributing to increasing the coupling strength between the tubes 1.

[0084] In addition, the panel reinforcement members 30 and 40 may include a second panel reinforcement member 40 supporting the inner surface of the skin panel 20 along the longitudinal direction of the tube body 10.

[0085] The second panel reinforcement member 40 reinforces the inner surface of the skin panel 20 in the longitudinal direction of the tube body 10 to suppress the skin panel 20 from being changed.

[0086] A plurality of the second panel reinforcement members 40 are spaced apart along the circumferential direction of the tube body 10 so that the reinforcing action of the skin panel 20 by the second panel reinforcement member 40 may be evenly applied to the skin panel 20 along the circumferential direction of the tube body 10 overall.

[0087] The second panel reinforcement member 40 receives compressive force of atmospheric pressure acting on the skin panel 20 and converts it into tensile force to disperse it, thereby preventing the skin panel 20 from locally causing deformation along the longitudinal direction of the tube body 10.

[0088] The second panel reinforcement member 40 is provided to continuously support the inner surface of the skin panel 20 along the longitudinal direction of the tube body 10 so that the atmospheric pressure dispersing action by the second panel reinforcement member 40 may be evenly exerted along the longitudinal direction of the tube 1.

[0089] The second panel reinforcement member 40 is provided in the form of a straight rib and is supported on the inner surface of the skin panel 20 along the longitudinal direction of the tube body 10, and may be coupled to the skin panel 20 through welding bonding or a bonding method using an adhesive or a fastening device.

[0090] As the compressive strength of the tube 1 is further increased through the second panel reinforcement member 40, the tube 1 can more stably withstand compressive load without increasing the thickness of the tube body 10.

[0091] The second panel reinforcement member 40 may be provided to support between the first panel reinforcement members 30. Therefore, the plurality of first panel reinforcement members 30 and the plurality of second panel reinforcement members 40 form a mutually intersecting lattice structure overall to evenly reinforce the entire area of the skin panel 20 in the longitudinal direction and the circumferential direction of the tube body 10.

[0092] Between the first panel reinforcement member 30 and the second panel reinforcement member 40 may be coupled through welding bonding, or a bonding method using an adhesive or a fastening device.

[0093] The tube 1 configured as described above may be lightweight by about 40% or more compared to a circular steel pipe. This was confirmed through an experiment comparing the weight of the tube 1 having almost the same strength and length as the circular steel pipe with the circular steel pipe. At this time, for the tube body 10 applied to the tube 1, one having the same internal cross-sectional area as the circular steel pipe was used.

[0094] As a result of the experiment, it was confirmed that a circular steel pipe having a diameter of 3.5 m, a thickness of 24 mm, and a length of 16 m had a weight of approximately 37.5 tons. And in the case of the tube 1 having almost the same strength and length as this circular steel pipe, it was confirmed that while the tube body 10 having the same internal cross-sectional area as the internal cross-sectional area of the circular steel pipe had a thickness of approximately 6 mm, the total weight of the entire tube 1 was about 20.5 tons.

[0095] The tube 1 configured as described above may be manufactured through a preparation step (s1), a reinforcement step (s2), a transport step (s3), and a coupling step (s4), as shown in FIG. 6.

[0096] In the preparation step (s1), the tube body 10, a plurality of skin panels 20 to be coupled to respective sides of the tube body 10, and panel reinforcement members 30 and 40 for reinforcement of the skin panel 20 may be prepared.

[0097] The tube body 10 and the skin panel 20 and the panel reinforcement members 30 and 40 may be individually formed and prepared in each factory.

[0098] In the reinforcement step (s2), the skin panels 20 may be reinforced by coupling the panel reinforcement members 30 and 40 to the inner surface of each skin panel 20.

[0099] In the transport step (s3), the skin panel 20 to which the panel reinforcement members 30 and 40 are coupled and the tube body 10 may be transported to a construction site for constructing the tube 1.

[0100] In the transport step (s3), as the panel reinforcement members 30 and 40 are transported to the construction site in a state of being coupled to the skin panel 20, the number of transported items may be reduced.

[0101] In addition, in the transport step (s3), the tube body 10 is transported to the construction site in a state of being separated from the skin panels 20, so that difficulty in transport due to excessive volume does not occur, or there is no violation of regulations according to transport. For example, in the case of a tube having a diameter of 3 m or more and a length of 16 m or more, it may be necessary to obtain a special permit to transport to the site after manufacturing in a factory, or transport itself may be difficult.

[0102] In the coupling step (s4), the manufacture of the tube 1 may be completed by coupling the plurality of skin panels 20 to which the panel reinforcement members 30 and 40 are coupled to respective sides of the circumference of the tube body 10 at the construction site.

[0103] Meanwhile, the tube 1 may be provided to further include tube reinforcement members 50 and 60 coupled to the outer surface of the tube body 10.

[0104] The tube reinforcement members 50 and 60 are coupled to the outer surface of the tube body 10 to increase the bending strength of the tube body 10 so that it can withstand bending load.

[0105] As shown in FIGS. 7 to 10, the tube reinforcement members 50 and 60 may include a first tube reinforcement member 50 supporting the outer surface of the tube body 10 along the circumferential direction of the tube body 10.

[0106] The first tube reinforcement member 50 reinforcing the outer surface of the tube body 10 in the circumferential direction of the tube body 10 suppresses deformation of the tube body 10 due to bending load received by self-weight or the traveling body, thereby increasing the bending strength of the tube body 10 capable of withstanding the bending load.

[0107] A plurality of the first tube reinforcement members 50 are spaced apart along the longitudinal direction of the tube body 10 so that the reinforcing action of the tube body 10 by the first tube reinforcement member 50 may be evenly applied overall along the longitudinal direction of the tube body 10.

[0108] The plurality of first tube reinforcement members 50 may be installed on respective sides of the tube body 10 along the circumference of the tube body 10.

[0109] Therefore, the tube 1 can more effectively resist bending load even in a state where the thickness of the tube body 10 is not formed excessively thick.

[0110] The first tube reinforcement member 50 may be coupled to the tube body 10 through welding bonding, or a bonding method using an adhesive or a fastening device.

[0111] The first tube reinforcement member 50 may be provided to take, for example, a bow shape. The first tube reinforcement member 50 takes a bow shape in which circumferential surfaces 51 and 52 have a curved portion 51 and a flat portion 52, and may be coupled to come into close contact with the outer surface of the tube body 1 through the flat portion 52 of the bottom.

[0112] As the first tube reinforcement member 50 supports the outer surface of the tube body 10 in a close contact state through the flat portion 52, the supporting force for the tube body 10 may be increased.

[0113] In addition, the tube reinforcement members 50 and 60 may include a second tube reinforcement member 60 supporting the outer surface of the tube body 10 along the longitudinal direction of the tube body 10.

[0114] The second tube reinforcement member 60 reinforces the outer surface of the tube body 10 in the longitudinal direction of the tube body 10 to suppress the tube body 10 from causing bending deformation in the longitudinal direction of the tube body 10.

[0115] A plurality of the second tube reinforcement members 60 are spaced apart along the circumferential direction of the tube body 10 so that the reinforcing action of the tube body 10 by the second tube reinforcement member 60 may be evenly applied overall along the circumferential direction of the tube body 10.

[0116] The second tube reinforcement member 60 is provided in the form of a straight rib and may be coupled to the tube body 10 to support the outer surface of the tube body 10 along the longitudinal direction of the tube body 10. The second tube reinforcement member 60 may be coupled to the tube body 10 through welding bonding or a bonding method using an adhesive or a fastening device.

[0117] The second tube reinforcement member 60 may be provided to support between the first tube reinforcement members 50. Therefore, the plurality of first tube reinforcement members 50 and the plurality of second tube reinforcement members 60 form a mutually intersecting lattice structure overall to evenly reinforce the entire area of the tube body 10 in the longitudinal direction and the circumferential direction.

[0118] Between the first tube reinforcement member 50 and the second tube reinforcement member 60 may be coupled through welding bonding, or a bonding method using an adhesive or a fastening device.

[0119] FIG. 10 shows a planar structure of the tube 1. As shown in FIG. 10, the first panel reinforcement member 30 and the first tube reinforcement member 50 may be disposed alternately with each other along the longitudinal direction of the tube body 10, and the second panel reinforcement member 40 and the second tube reinforcement member 60 may be disposed alternately with each other along the circumferential direction of the tube body 10. For reference, FIG. 10 shows a part of the skin panel 20 cut away to clearly show the structures of the panel reinforcement members 30 and 40 and the tube reinforcement members 50 and 60.

[0120] According to the arrangement structure of the panel reinforcement members 30 and 40 and the tube reinforcement members 50 and 60, upon coupling of the skin panel 20 and the tube body 10, it is possible to suppress interference between the panel reinforcement members 30 and 40 provided on the inner surface of the skin panel 20 and the tube reinforcement members 50 and 60 provided on the outer surface of the tube body 10. Therefore, the tube 1 is free from a concern that coupling between the tube body 10 and the skin panel 20 becomes difficult due to the application of the panel reinforcement members 30 and 40 and the tube reinforcement members 50 and 60.

Claims

1. A tube for a transportation system comprising:

a tube body provided as a rectangular steel pipe to provide a traveling path for a traveling body traveling under a pressure condition lower than atmospheric pressure;

a plurality of skin panels coupled to respective sides of a circumference of the tube body by having a curvature to form an arch shape; and

a panel reinforcement member coupled to an inner surface of the skin panel.

2. The tube for a transportation system of claim 1, wherein the panel reinforcement member comprises a first panel reinforcement member supporting the inner surface of the skin panel along a circumferential direction of the tube body.

3. The tube for a transportation system of claim 2, wherein a plurality of the first panel reinforcement members are spaced apart along a longitudinal direction of the tube body.

4. The tube for a transportation system of claim 2, wherein the first panel reinforcement member continuously supports the inner surface of the skin panel along the circumferential direction of the tube body.

5. The tube for a transportation system of claim 4, wherein the first panel reinforcement member comprises an arc-shaped reinforcement member taking an arc form such that an outer circumferential surface thereof comes into close contact with the inner surface of the skin panel.

6. The tube for a transportation system of claim 4, wherein the first panel reinforcement member comprises a bow-shaped reinforcement member taking a bow shape in which a circumferential surface has a curved portion and a flat portion, and coming into close contact with the inner surface of the skin panel through the curved portion.

7. The tube for a transportation system of claim 3, wherein the first panel reinforcement member comprises:

an arc-shaped reinforcement member taking an arc form such that an outer circumferential surface thereof comes into close contact with the inner surface of the skin panel; and

a bow-shaped reinforcement member taking a bow shape in which a circumferential surface has a curved portion and a flat portion, and coming into close contact with the inner surface of the skin panel through the curved portion,

wherein the bow-shaped reinforcement member is disposed at least at both ends of the skin panel in the longitudinal direction of the tube body.

8. The tube for a transportation system of claim 2, wherein the panel reinforcement member further comprises a second panel reinforcement member supporting the inner surface of the skin panel along a longitudinal direction of the tube body.

9. The tube for a transportation system of claim 8, wherein a plurality of the second panel reinforcement members are spaced apart along the circumferential direction of the tube body.

10. The tube for a transportation system of claim 8, wherein the second panel reinforcement member supports between the first panel reinforcement members.

11. The tube for a transportation system of claim 1, further comprising:
a tube reinforcement member coupled to an outer surface of the tube body.

12. The tube for a transportation system of claim 11, wherein the tube reinforcement member comprises a first tube reinforcement member supporting the outer surface of the tube body along a circumferential direction of the tube body.

13. The tube for a transportation system of claim 12, wherein a plurality of the first tube reinforcement members are spaced apart along a longitudinal direction of the tube body.

14. The tube for a transportation system of claim 12, wherein the tube reinforcement member further comprises a second tube reinforcement member supporting the outer surface of the tube body along a longitudinal direction of the tube body.

15. The tube for a transportation system of claim 14, wherein a plurality of the second tube reinforcement members are spaced apart along the circumferential direction of the tube body.

16. The tube for a transportation system of claim 1, wherein the rectangular steel pipe is selected from any one of a rectangular steel pipe having a square cross-section and a rectangular steel pipe having a rectangular cross-section.

17. A tube for a transportation system comprising:

a tube body provided as a rectangular steel pipe to provide a traveling path for a traveling body traveling under a pressure condition lower than atmospheric pressure;

a plurality of skin panels coupled to respective sides of a circumference of the tube body by having a curvature to form an arch shape; and

a plurality of panel reinforcement members coupled to inner surfaces of the skin panels to form a lattice structure.

18. A method for manufacturing a tube for a transportation system, the method comprising:

preparing a rectangular tube body for providing a traveling path for a traveling body traveling under a pressure condition lower than atmospheric pressure, a plurality of skin panels to be coupled to respective sides of a circumference of the tube body, and a panel reinforcement member for reinforcing the skin panel;

reinforcing the skin panels by coupling the panel reinforcement member to an inner surface of each of the skin panels; and

coupling the plurality of skin panels, to which the panel reinforcement member is coupled, to the respective sides of the circumference of the tube body.

19. The method for manufacturing a tube for a transportation system of claim 18, further comprising transporting performed between the reinforcing and the coupling,

wherein the skin panel coupled with the panel reinforcement member and the tube body are transported to a construction site for construction of the tube for a transportation system in the transporting, and

the coupling is performed at the construction site.

Drawing