Tube for transportation system and manufacturing method thereof

Abstract

A tube for a transportation system is disclosed. A tube for a transport system according to an embodiment may comprise: a tube body provided as a rectangular steel pipe so as to provide a travelling passage of a traveling body which travels under a pressure condition lower than the atmospheric pressure; a plurality of skin panels which each have a curvature to form an arch shape and are coupled to respective circumferential surfaces of the tube body; and a panel reinforcing member coupled to the inner surface of each skin panel.

Description

Tube for transportation system and method for manufacturing same

[0001] The disclosed invention relates to a tube for a transportation system and a method for manufacturing the same, which is provided to provide a traveling path for a transportation system that moves a vehicle under low pressure conditions.

[0002] Recently, transportation systems designed to allow vehicles to travel at high speeds under low pressure conditions have emerged.

[0003] These high-speed transportation systems face two challenges depending on speed: designing an aerodynamic vehicle to reduce exponentially increasing air resistance, and applying a magnetic levitation system to reduce friction between the vehicle and the track.

[0004] The technology introduced for this purpose is the Hyperloop device. This Hyperloop device refers to a system that transports moving vehicles using magnetic levitation within a sealed tube at a pressure of less than 0.001 atmosphere.

[0005] For these hyperloop devices, electromagnetic and mechanical systems are important, but the most important thing is to implement a tube structure that can maintain a sub-vacuum state of about 0.001 atmosphere or less, which accounts for more than 50% of the initial investment cost.

[0006] One aspect of the disclosed invention is to provide a tube for a transportation system that can be made lightweight while ensuring stable strength, and a method for manufacturing the same.

[0007] One aspect of the disclosed invention is to provide a tube for a transportation system and a method for manufacturing the same, which can prevent excessive weight increase in response to an increase in the internal cross-sectional area forming the travel path of a vehicle.

[0008] One aspect of the disclosed invention is to provide a tube for a transportation system and a method for manufacturing the same, which can solve the transportation problem for construction in response to the expansion of the internal cross-sectional area forming the travel path of a vehicle.

[0009] A tube for a transportation system according to one aspect of the disclosed invention may include a tube body formed of a square steel pipe to provide a travel path for a vehicle traveling under pressure conditions lower than atmospheric pressure; a plurality of skin panels having a curvature to form an arch shape and joined to each side of the tube body; and a panel reinforcing member joined to the inner surface of the skin panels.

[0010] The above panel reinforcing member may include a first panel reinforcing member that supports the inner surface of the skin panel along the circumferential direction of the tube body.

[0011] The above first panel reinforcing member may be arranged in multiple pieces spaced apart along the length direction of the tube body.

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

[0013] The above first panel reinforcing member may include an arc-shaped reinforcing member having an outer circumferential surface that takes an arc shape so as to be in close contact with the inner surface of the skin panel.

[0014] The above first panel reinforcing member may include an arc-shaped reinforcing member having a circumferential surface having a curved portion and a flat portion, and which is in close contact with the inner surface of the skin panel through the curved portion.

[0015] The first panel reinforcing member includes an arc-shaped reinforcing member having an outer circumferential surface that takes an arc shape so as to be in close contact with the inner surface of the skin panel; and an arc-shaped reinforcing member having an arc-shaped circumferential surface having a curved portion and a flat portion, and being in close contact with the inner surface of the skin panel through the curved portion; and the arc-shaped reinforcing member can be arranged at at least both ends of the skin panel in the longitudinal direction of the tube body.

[0016] The above panel reinforcing member may further include a second panel reinforcing member that supports the inner surface of the skin panel along the longitudinal direction of the tube body.

[0017] The above second panel reinforcing member may be arranged in multiple pieces spaced apart along the circumferential direction of the tube body.

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

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

[0020] The above tube reinforcing member may include a first tube reinforcing member that supports the outer surface of the tube body along the circumferential direction of the tube body.

[0021] A plurality of first tube reinforcing members may be spaced apart along the length of the tube body.

[0022] The above tube reinforcing member may further include a second tube reinforcing member that supports the outer surface of the tube body along the longitudinal direction of the tube body.

[0023] A plurality of the above second tube reinforcing members can be spaced apart along the circumferential direction of the tube body.

[0024] The above square steel pipe can be selected from either a square steel pipe having a square cross-section or a square steel pipe having a rectangular cross-section.

[0025] A tube for a transportation system according to one aspect of the disclosed invention may include a tube body formed of a square steel pipe to provide a travel path for a vehicle traveling under pressure conditions lower than atmospheric pressure; a plurality of skin panels having a curvature to form an arch shape and joined to each side of the tube body; and a plurality of panel reinforcing members joined to form a lattice structure on the inner surface of the skin panels.

[0026] A method for manufacturing a tube for a transportation system according to one aspect of the disclosed invention may include a preparatory step of providing a square tube body for providing a travel path for a vehicle traveling under a pressure condition lower than atmospheric pressure, a plurality of skin panels for joining to each side of the circumference of the tube body, and a panel reinforcing member for reinforcing the skin panels; a reinforcing step of joining the panel reinforcing member to the inner surface of each of the skin panels to reinforce the skin panels; and a joining step of joining the plurality of skin panels to which the panel reinforcing member is joined to each side of the circumference of the tube body.

[0027] A method for manufacturing a tube for a transportation system further includes a transport step performed between the reinforcing step and the joining step, wherein the skin panel to which the panel reinforcing member is joined and the tube body are transported to a construction site for constructing the tube for the transportation system in the transport step, and the joining step can be performed at the construction site.

[0028] According to one aspect of the disclosed invention, a tube for a transportation system capable of reducing weight while ensuring stable strength and a method for manufacturing the same can be provided.

[0029] According to one aspect of the disclosed invention, a tube for a transportation system and a method for manufacturing the same can be provided that can prevent excessive weight increase in response to an increase in the internal cross-sectional area forming a travel path of a vehicle.

[0030] According to one aspect of the disclosed invention, a tube for a transportation system and a method for manufacturing the same can be provided that can solve a transportation problem for construction in response to an increase in the internal cross-sectional area forming a travel path of a vehicle.

[0031] Figure 1 illustrates a state in which tubes for a transportation system according to one embodiment of the disclosed invention are connected.

[0032] Figure 2 is an exploded perspective view of a tube for a transport system according to one embodiment of the disclosed invention.

[0033] FIG. 3 is a cross-sectional view of a tube for a transport system according to one embodiment of the disclosed invention.

[0034] FIG. 4 is an enlarged perspective view of the structure of a skin panel to which a panel reinforcing member is combined in a tube for a transportation system according to one embodiment of the disclosed invention.

[0035] FIG. 5 is a cross-sectional view of a skin panel to which a panel reinforcing member is combined in a tube for a transportation system according to one embodiment of the disclosed invention.

[0036] FIG. 6 illustrates steps for performing a method for manufacturing a tube for a transportation system according to one embodiment of the disclosed invention.

[0037] FIG. 7 illustrates a tube body of a tube for a transportation system according to another embodiment of the disclosed invention.

[0038] Fig. 8 is a cross-sectional view of a tube for the transport system illustrated in Fig. 7.

[0039] Figure 9 is an enlarged view of part A of Figure 7.

[0040] Fig. 10 is a plan view of a tube for the transport system illustrated in Fig. 7.

[0041] Throughout the specification, the same reference numerals denote the same components. This specification does not describe all elements of the embodiments, and any content that is general in the technical field to which the present invention pertains or that overlaps between the embodiments is omitted. The terms 'part, module, element, block' used in the specification may be implemented in software or hardware, and depending on the embodiments, multiple 'parts, modules, elements, blocks' may be implemented as a single component, or a single 'part, module, element, block' may include multiple components.

[0042] Throughout the specification, when a part is said to be "connected" to another part, this includes not only direct connection but also indirect connection, and indirect connection includes connection via a wireless communication network.

[0043] Additionally, when a part is said to "include" a component, this does not mean that it excludes other components, but rather that it may include other components, unless otherwise specifically stated.

[0044] Throughout the specification, when it is said that an element is "on" another element, this includes not only cases where the element is in contact with the other element, but also cases where another element exists between the two elements.

[0045] The terms first, second, etc. are used to distinguish one component from another, and the components are not limited by the aforementioned terms.

[0046] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0047] The identification codes in each step are used for convenience of explanation and do not describe the order of each step, and each step may be performed in a different order than specified unless the context clearly indicates a specific order.

[0048] The operating principle and embodiments of the present invention will be described with reference to the attached drawings below.

[0049] For reference, Fig. 1 shows a state in which tubes for a transportation system according to one embodiment are connected, Fig. 2 is an exploded perspective view of a tube for a transportation system according to one embodiment, and Fig. 3 is a cross-sectional view of a tube for a transportation system according to one embodiment. In addition, Fig. 4 is an enlarged perspective view of a structure of a skin panel to which a panel reinforcing member is coupled in a tube for a transportation system according to one embodiment, and Fig. 5 is a cross-sectional view of a skin panel to which a panel reinforcing member is coupled in a tube for a transportation system according to one embodiment.

[0050] As shown in FIGS. 1 to 5, a tube (hereinafter, tube) (1) for a transportation system has a tube body (10).

[0051] The tube body (10) can provide a travel path of the vehicle of the transportation system. The travel path of the vehicle can be provided through the internal space (10a) of the tube body (10).

[0052] A guide rail is installed inside the tube body (10), and the driving body can travel at high speed along the tube (1) while being magnetically levitated from the guide rail by the magnetic force formed between the driving body and the guide rail.

[0053] Here, ultra-high speed can refer to a speed of 300 km / h or more or 700 km / h or more, but is not limited thereto.

[0054] In the transportation system, a magnetic levitation method is applied to reduce frictional resistance, which is one of the driving resistances, and by periodically and precisely converting the attractive force and repulsive force of the magnetic field within the tube body (10) to maintain a constant gap between the guide rail and the driving body, the driving body can be maintained in a magnetically levitated state.

[0055] The interior of the tube body (10) can be maintained in a low pressure state to reduce air resistance when the vehicle is running.

[0056] The pressure inside the tube body (10) can be a pressure close to a vacuum. When the pressure outside the tube is an atmospheric pressure of 1 atm (approximately 101 kPa, 1 bar), the pressure inside the tube body (10) can be less than 10 kPa (approximately 0.1 bar).

[0057] The internal pressure of the tube body (10) is not limited to this. The internal pressure 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 pressures lower than these.

[0058] Hereinafter, the internal pressure of the tube body (10) will be described based on approximately 100 Pa (1 mbar), which is 0.001 atm. However, the interior of the tube body (10) can be provided within various pressure ranges including the aforementioned pressure values ​​within a range relatively lower than the atmospheric pressure.

[0059] In a transportation system like this, it is important to have a system that floats and propels the system electromagnetically or mechanically, but it is also important to implement a tube (1) to maintain a vacuum state or a vacuum-like state of 0.001 atm or less in the infrastructure that accounts for more than 50% of the initial investment cost.

[0060] And in the structure of the tube (1) in which the inside forms a low pressure, since the differential pressure load according to the pressure difference between the inside and outside of the tube as well as the bending load must be considered at the same time, the thickness between the inner and outer surfaces of the steel pipe forming the tube body (10) needs to be thickened in order to ensure stable strength of the tube (1).

[0061] According to one embodiment, a tube (1) is provided such that a skin panel (20) and a panel reinforcing member (30, 40) are installed on a tube body (10), thereby making the thickness between the inner and outer surfaces of the tube body (10) thin while allowing the tube (1) to stably withstand bending load and differential pressure load.

[0062] The tube body (10) may be formed of a square steel pipe. In order to maintain a pressure of approximately 0.001 atm along the travel path of the vehicle, it is necessary to strongly suppress the increase in the amount of material within the travel path. To this end, the tube body (10) must be formed of a material with a low outgassing rate. Steel has excellent yield strength and tensile strength, and has a lower outgassing rate than concrete or polymer composite materials. Therefore, the tube body (10) formed of steel can be advantageously applied to ensure rigidity while maintaining a sub-vacuum state along the travel path of the vehicle formed within.

[0063] As the tube body (10), any one of square steel pipes having a square or rectangular cross-section structure can be selected. Accordingly, the tube body (10) can have various cross-section structures according to the specifications of the driving body or the shape of the guide rail compared to a circular steel pipe.

[0064] In addition, the tube body (10) having a square cross-sectional structure can be advantageously applied to improve workability or work precision according to installation of the guide rail by having a flat inner bottom surface.

[0065] The skin panel (20) is coupled to each side of the tube body (10) with a curvature to form an arch shape, and the panel reinforcing member (30, 40) can be coupled to the skin panel (20) to support the inner surface of the skin panel (20).

[0066] The skin panel (20) reinforced by the panel reinforcing member (30, 40) can increase the strength of the tube (1) by reinforcing each side of the tube body (10) composed of a square steel pipe in the thickness direction of the tube body (10), thereby increasing the overall thickness of the tube body (10).

[0067] Accordingly, the tube (1) can be made lighter by reducing the thickness between the inner and outer surfaces of the steel pipe constituting the tube body (10), and the rigidity corresponding to the reduced thickness of the steel pipe can be supplemented through the skin panel (20) and panel reinforcing members (30, 40), thereby ensuring stable strength overall.

[0068] In addition, since this tube (1) can be made lightweight while stably securing strength, there is no concern that the weight will increase excessively in response to the expansion of the internal cross-sectional area forming the travel path of the vehicle.

[0069] While conventional circular steel pipes typically rarely exceed 2 m in diameter, those used in passenger and cargo Hyperloop systems can have diameters as large as 4 to 5 m. When these large-diameter circular steel pipes must resist external atmospheric pressure due to internal vacuum rather than internal pressure, the pipe thickness must be relatively thicker to prevent local buckling due to increased compressive stress, unlike when internal pressure is applied.

[0070] In contrast, when the internal cross-sectional area of ​​the tube body (10) that provides the driving path of the vehicle is expanded, the tube (1) can prevent local buckling due to increased compressive stress through the skin panel (20) and panel reinforcing members (30, 40) without excessively increasing the thickness of the steel pipe constituting the tube body (10), so there is no concern that the weight will excessively increase in response to the expansion of the internal cross-sectional area of ​​the tube body (10).

[0071] The skin panel (20) may be provided as a steel plate that is banded to have a curvature so as to form an arch shape. The skin panel (20) may be provided as an arch-shaped steel plate that is banded to have a gentle curvature along the circumferential direction of the tube body (10).

[0072] The skin panel (20) can be joined to the tube body (10) so that both ends in the width direction corresponding to the circumferential direction of the tube body (10) are supported by the corner portions of the tube body (10). The skin panel (20) can be joined to the tube body (10) through a welding joint, a joint using an adhesive, or a fastening device.

[0073] The panel reinforcing member (30, 40) may include a first panel reinforcing member (30) that supports and reinforces the inner surface of the skin panel (20) along the circumferential direction of the tube body (10).

[0074] The first panel reinforcing member (30) that reinforces the inner surface of the skin panel (20) in the circumferential direction of the tube body (10) can suppress the circumference of the skin panel (20) from being deformed inward due to the compressive force of the external atmospheric pressure, thereby increasing the compressive strength of the tube (1) according to the compressive load of the atmospheric pressure.

[0075] A plurality of first panel reinforcing members (30) are spaced apart from each other along the length direction of the tube body (10) so that the reinforcing action of the skin panel (20) by the first panel reinforcing members (30) can be evenly applied to the entire skin panel (20) along the length direction of the tube body (10).

[0076] The first panel reinforcing member (30) receives the compressive force of atmospheric pressure acting on the skin panel (20) and converts it into tensile force to distribute it, thereby preventing the skin panel (20) from being locally deformed along the circumferential direction of the tube body (10) while increasing the strength of the tube (1).

[0077] In Fig. 5, solid arrows indicate atmospheric pressure acting on the skin panel (20), and dotted arrows indicate the direction of tensile force.

[0078] The first panel reinforcing 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 function of dispersing atmospheric pressure can be evenly exerted along the circumferential direction of the tube body (10).

[0079] Therefore, the tube (1) can effectively resist atmospheric pressure even when the thickness of the skin panel (20) is not formed excessively thick, and the thin skin panel (20) can contribute to making the tube (1) lightweight.

[0080] For example, the skin panel (20) may be prepared as a thin plate coil, such as a hot-rolled coil having a thickness of 6 mm or less. In the case of a hot-rolled coil, it is easy to secure mechanical properties and is advantageous for processing such as bending or roll forming, so that the production of a skin panel (20) subjected to banding processing can be facilitated.

[0081] The first panel reinforcing member (30) can be joined to the skin panel (20) by welding, joining using an adhesive, or a fastening device.

[0082] The first panel reinforcing member (30) may include at least one of an arc-shaped reinforcing member (31) provided in an arc shape and an arc-shaped reinforcing member (32) provided in an arc shape.

[0083] The arc-shaped reinforcing member (31) may be provided so that its outer surface (31a) takes the shape of an arc that is in close contact with the inner surface of the skin panel (20). The outer surface (31a) of the arc-shaped reinforcing member (31) has a curvature corresponding to the curvature of the skin panel (20) so that it can be in close contact with the inner surface of the skin panel (20).

[0084] The arc-shaped reinforcing member (32) has an arc-shaped shape with a circumferential surface (32a, 32b) having a curved portion (32a) and a flat portion (32b), and can be joined to the inner surface of the skin panel (20) through the curved portion (32a).

[0085] The arch-shaped reinforcing member (32) can increase the supporting force for the tube body (10) by being supported on the outer surface of the tube body (10) through the flat portion (32b).

[0086] And, since the arc-shaped reinforcing member (31) can reduce the amount of material used compared to the arc-shaped reinforcing member (32), it can be advantageous in reducing the weight of the tube (1).

[0087] Tubes (1) are arranged to have a certain length and are connected continuously to provide a driving path for the vehicle.

[0088] The skin panel (20) has flange portions (21) at both ends in the longitudinal direction, and the tubes (1) can be connected and joined to be mutually supported through the flange portions (21).

[0089] The flange portion (21) is connected to the two ends of the skin panel (20) so as to be positioned radially outward, and the tubes (1) can be connected between the corresponding flange portions (21).

[0090] The flange portion (21) and the skin panel (20) and the flange portions (21) of the corresponding tubes (1) can be joined by welding, adhesive, or a fastening device.

[0091] The first panel reinforcing member (30) may be provided with both an arc-shaped reinforcing member (31) and an arc-shaped reinforcing member (32). At this time, by arranging the arc-shaped reinforcing members (32) at least at both ends of the skin panel (20) in the longitudinal direction of the tube body (10), the bonding strength between the tubes (1) can be increased.

[0092] That is, the arc-shaped reinforcing members (32) positioned at both ends of the skin panel (20) are provided on the inner surface of the skin panel (20) corresponding to the position of the flange portion (21), and when the tubes (1) are joined, the tubes (1) on both sides can be joined in a mutually supported state through the flange portion (21) and the arc-shaped reinforcing members (32) positioned at the ends. Therefore, the arc-shaped reinforcing members (32) positioned at the ends of the skin panel (20) have a larger surface area than the arc-shaped reinforcing members (31), thereby increasing the contact area between the tubes (1), thereby contributing to increasing the bonding strength between the tubes (1).

[0093] Additionally, the panel reinforcing member (30, 40) may be provided with a second panel reinforcing member (40) that supports the inner surface of the skin panel (20) along the longitudinal direction of the tube body (10).

[0094] The second panel reinforcing member (40) can prevent the skin panel (20) from being changed by reinforcing the inner surface of the skin panel (20) in the longitudinal direction of the tube body (10).

[0095] A plurality of second panel reinforcing members (40) are spaced apart from each other along the circumferential direction of the tube body (10) so that the reinforcing action of the skin panel (20) by the second panel reinforcing members (40) can be evenly applied to the entire skin panel (20) along the circumferential direction of the tube body (10).

[0096] The second panel reinforcing member (40) receives the 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 being locally deformed along the length direction of the tube body (10).

[0097] The second panel reinforcing 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 effect by the second panel reinforcing member (40) can be evenly exerted along the longitudinal direction of the tube (1).

[0098] The second panel reinforcing member (40) is provided in the form of a rib in the shape of a line and is supported on the inner surface of the skin panel (20) along the longitudinal direction of the tube body (10), and can be joined to the skin panel (20) through a method such as welding, bonding using an adhesive, or a fastening device.

[0099] As the compressive strength of the tube (1) is further increased through the second panel reinforcing member (40), it can withstand the compressive load more stably without increasing the thickness of the tube body (10).

[0100] The second panel reinforcing member (40) may be provided to support between the first panel reinforcing members (30). Accordingly, the plurality of first panel reinforcing members (30) and the plurality of second panel reinforcing members (40) form a lattice structure intersecting with each other as a whole, so that the entire area of ​​the skin panel (20) can be evenly reinforced in the longitudinal and circumferential directions of the tube body (10).

[0101] The first panel reinforcing member (30) and the second panel reinforcing member (40) can be joined by welding, bonding using an adhesive, or a fastening device.

[0102] A tube (1) configured in this manner can be made lighter by approximately 40% or more compared to a circular steel pipe. This was confirmed through an experiment comparing the weight of a tube (1) having approximately the same strength and length as a circular steel pipe with that of a circular steel pipe. In this case, a tube body (10) applied to the tube (1) was used that had the same internal cross-sectional area as a circular steel pipe.

[0103] As a result of the experiment, it was confirmed that a circular steel pipe with a diameter of 3.5 m, a thickness of 24 mm, and a length of 16 m has a weight of approximately 37.5 tons. In addition, in the case of a tube (1) having almost the same strength and length as this circular steel pipe, it was confirmed that the total weight of the entire tube (1) was approximately 20.5 tons while the tube body (10) having an internal cross-sectional area identical to that of the circular steel pipe had a thickness of approximately 6 mm.

[0104] A tube (1) configured in this manner can be manufactured through a preparation step (s1), a reinforcement step (s2), a transport step (s3), and a joining step (s4), as illustrated in FIG. 6.

[0105] In the preparation stage (s1), a tube body (10), a plurality of skin panels (20) to be joined to each side of the tube body (10), and panel reinforcing members (30, 40) for reinforcing the skin panels (20) can be prepared.

[0106] The tube body (10), skin panel (20), and panel reinforcing member (30, 40) can be individually molded and prepared at each factory.

[0107] In the reinforcement step (s2), the skin panels (20) can be reinforced by combining panel reinforcement members (30, 40) to the inner surface of each skin panel (20).

[0108] In the transport stage (s3), the skin panel (20) and tube body (10) combined with the panel reinforcing member (30, 40) can be transported to the construction site for constructing the tube (1).

[0109] In the transport stage (s3), the panel reinforcing members (30, 40) are transported to the construction site while being connected to the skin panel (20), thereby reducing the number of transported items.

[0110] In addition, in the transport stage (s3), the tube body (10) is transported to the construction site in a state separated from the skin panels (20), so as to avoid difficulties in transport due to excessive volume or violations of transport regulations. For example, in the case of a tube having a diameter of 3 m or more and a length of 16 m or more, special permission may be required to transport it to the site after manufacturing it at the factory, or transport itself may be difficult.

[0111] In the bonding step (s4), a plurality of skin panels (20) to which panel reinforcing members (30, 40) are bonded at the construction site can be bonded to each side of the circumference of the tube body (10) to complete the manufacturing of the tube (1).

[0112] Meanwhile, the tube (1) may be provided with a tube reinforcing member (50, 60) that is further coupled to the outer surface of the tube body (10).

[0113] The tube reinforcing member (50, 60) is bonded to the outer surface of the tube body (10) and can increase the bending strength of the tube body (10) so that it can withstand bending load.

[0114] As shown in FIGS. 7 to 10, the tube reinforcing member (50, 60) may include a first tube reinforcing member (50) that supports the outer surface of the tube body (10) along the circumferential direction of the tube body (10).

[0115] The first tube reinforcing member (50) that reinforces the outer surface of the tube body (10) in the circumferential direction of the tube body (10) can increase the bending strength of the tube body (10) that can withstand the bending load by suppressing deformation of the tube body (10) due to bending load received by its own weight or a moving body, etc.

[0116] A plurality of first tube reinforcing members (50) are spaced apart from each other along the length direction of the tube body (10) so that the reinforcing action of the tube body (10) by the first tube reinforcing members (50) can be applied evenly throughout the length direction of the tube body (10).

[0117] A plurality of first tube reinforcing members (50) can be installed on each side of the tube body (10) along the circumference of the tube body (10).

[0118] Accordingly, the tube (1) can more effectively resist bending load even when the thickness of the tube body (10) is not formed excessively thick.

[0119] The first tube reinforcement member (50) can be joined to the tube body (10) through a welding method, an adhesive method, a fastening device, or a similar method.

[0120] The first tube reinforcing member (50) may be provided, for example, to take the shape of an arc. The first tube reinforcing member (50) may take the shape of an arc in which the peripheral surface (51, 52) has a curved portion (51) and a flat portion (52), and may be coupled to the outer surface of the tube body (1) so as to be in close contact with the flat portion (52) of the bottom.

[0121] The first tube reinforcing member (50) can increase the support force for the tube body (10) by supporting the outer surface of the tube body (10) in close contact with the flat surface (52).

[0122] Additionally, the tube reinforcing member (50, 60) may be provided with a second tube reinforcing member (60) that supports the outer surface of the tube body (10) along the longitudinal direction of the tube body (10).

[0123] The second tube reinforcing member (60) can reinforce the outer surface of the tube body (10) in the longitudinal direction of the tube body (10) to prevent the tube body (10) from being bent in the longitudinal direction of the tube body (10).

[0124] A plurality of second tube reinforcing members (60) are spaced apart from each other along the circumferential direction of the tube body (10) so that the reinforcing action of the tube body (10) by the second tube reinforcing members (60) can be applied evenly throughout the circumferential direction of the tube body (10).

[0125] The second tube reinforcing member (60) is provided in the form of a rib in the shape of a line and can be joined 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 reinforcing member (60) can be joined to the tube body (10) through a welding method or a joining method using an adhesive or a fastening device.

[0126] The second tube reinforcing member (60) may be provided to support between the first tube reinforcing members (50). Accordingly, the plurality of first tube reinforcing members (50) and the plurality of second tube reinforcing members (60) may form a lattice structure intersecting with each other as a whole, thereby evenly reinforcing the entire area of ​​the tube body (10) in the longitudinal and circumferential directions.

[0127] The first tube reinforcing member (50) and the second tube reinforcing member (60) can be joined by welding, or by joining using an adhesive or a fastening device.

[0128] Fig. 10 illustrates a planar structure of a tube (1). As illustrated in Fig. 10, the first panel reinforcing member (30) and the first tube reinforcing member (50) may be alternately arranged along the longitudinal direction of the tube body (10), and the second panel reinforcing member (40) and the second tube reinforcing member (60) may be alternately arranged along the circumferential direction of the tube body (10). For reference, Fig. 10 illustrates a portion of the skin panel (20) cut away to clearly show the structures of the panel reinforcing members (30, 40) and the tube reinforcing members (50, 60).

[0129] According to the arrangement structure of the panel reinforcing members (30, 40) and the tube reinforcing members (50, 60) as described above, when the skin panel (20) and the tube body (10) are joined, the panel reinforcing members (30, 40) provided on the inner surface of the skin panel (20) and the tube reinforcing members (50, 60) provided on the outer surface of the tube body (10) can be prevented from interfering with each other. Accordingly, there is no concern that the tube (1) will have difficulty in joining the tube body (10) and the skin panel (20) due to the application of the panel reinforcing members (30, 40) and the tube reinforcing members (50, 60).

Claims

1. A tube body made of a square steel pipe to provide a driving path for a vehicle running under pressure conditions lower than atmospheric pressure; A plurality of skin panels joined to each side of the tube body with a curvature to form an arch shape; and A tube for a transportation system, comprising a panel reinforcing member joined to the inner surface of the above skin panel.

2. In paragraph 1, The above panel reinforcement member is, A tube for a transportation system, comprising: a first panel reinforcing member supporting the inner surface of the skin panel along the circumferential direction of the tube body; 3. In paragraph 2, A tube for a transportation system in which a plurality of the first panel reinforcing members are spaced apart along the length direction of the tube body.

4. In paragraph 2, The above first panel reinforcing member is a tube for a transportation system that continuously supports the inner surface of the skin panel along the circumferential direction of the tube body.

5. In paragraph 4, The above first panel reinforcing member is, A tube for a transportation system including an arc-shaped reinforcing member having an outer surface that takes the shape of an arc so as to be in close contact with the inner surface of the skin panel.

6. In paragraph 4, The above first panel reinforcing member is, A tube for a transportation system having an arc shape having a circumferential surface and a flat surface, and including an arc-shaped reinforcing member that is in close contact with the inner surface of the skin panel through the arc-shaped reinforcing member.

7. In paragraph 3, The above first panel reinforcing member is, An arc-shaped reinforcing member having an arc shape so that the outer surface adheres closely to the inner surface of the skin panel; and It includes an arc-shaped reinforcing member having an arc shape with a periphery having a curved portion and a flat portion, and which is in close contact with the inner surface of the skin panel through the curved portion; A tube for a transportation system, wherein the arc-shaped reinforcing members are arranged at at least both ends of the skin panel in the longitudinal direction of the tube body.

8. In paragraph 2, The above panel reinforcement member is, A tube for a transportation system further comprising a second panel reinforcing member supporting the inner surface of the skin panel along the longitudinal direction of the tube body.

9. In paragraph 8, A tube for a transportation system in which a plurality of the second panel reinforcing members are spaced apart along the circumferential direction of the tube body.

10. In paragraph 8, The above second panel reinforcing member is a tube for a transportation system that supports between the above first panel reinforcing members.

11. In paragraph 1, A tube for a transportation system further comprising a tube reinforcing member joined to the outer surface of the tube body.

12. In paragraph 11, The above tube reinforcement member is, A tube for a transportation system, comprising: a first tube reinforcing member supporting an outer surface of the tube body along a circumferential direction of the tube body.

13. In paragraph 12, A tube for a transportation system in which a plurality of first tube reinforcing members are spaced apart along the length of the tube body.

14. In Article 12, The above tube reinforcement member is, A tube for a transportation system further comprising a second tube reinforcing member that supports the outer surface of the tube body along the longitudinal direction of the tube body.

15. In Article 14, A tube for a transportation system in which a plurality of the second tube reinforcing members are spaced apart along the circumferential direction of the tube body.

16. In paragraph 1, The above square steel pipe is a tube for a transportation system, wherein one of a square steel pipe having a square cross-section and a square steel pipe having a rectangular cross-section is selected.

17. A tube body made of a square steel pipe to provide a travel path for a vehicle running under pressure conditions lower than atmospheric pressure; A plurality of skin panels joined to each side of the tube body with a curvature to form an arch shape; and A tube for a transportation system, comprising a plurality of panel reinforcing members joined to form a lattice structure on the inner surface of the skin panel.

18. A preparatory step of providing a square tube body for providing a driving path for a vehicle running under pressure conditions lower than atmospheric pressure, a plurality of skin panels for joining to each side of the tube body, and a panel reinforcing member for reinforcing the skin panels; A reinforcing step of reinforcing the skin panels by combining panel reinforcing members on the inner surface of each skin panel; and A method for manufacturing a tube for a transportation system, comprising a joining step of joining a plurality of skin panels to which the panel reinforcing members are joined to each side of the tube body.

19. In paragraph 18, Further comprising a transport step performed between the above reinforcing step and the bonding step; The skin panel and the tube body combined with the above panel reinforcing member are transported to the construction site for the construction of the tube for the transportation system in the above transport step. The above bonding step is a method for manufacturing a tube for a transportation system performed at the above construction site.

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