CN112626936B - Double-line track beam with metal belt and single-pipe double-line vacuum pipeline - Google Patents

Abstract

The invention provides a double-line track beam with metal bands and a single-pipe double-line vacuum pipeline, wherein the double-line track beam comprises a first track, a second track, a connecting cover plate and a plurality of metal bands, the first track comprises a first side wall, a second side wall and a first track bottom structure, the second track comprises a third side wall, a fourth side wall and a second track bottom structure, each side wall comprises a plurality of reinforcing ribs, any metal band is arranged on the outer sides of the reinforcing ribs of the first side wall, the first track bottom structure, the reinforcing ribs of the second side wall, the connecting cover plate, the reinforcing ribs of the third side wall, the second track bottom structure and the reinforcing ribs of the fourth side wall, and the metal bands are used for resisting tensile stress generated on the outer sides of the double-line track beam due to the action of the difference of internal and external atmospheric pressures of the double-line track beam. By applying the technical scheme of the invention, the technical problems of low structural strength, overhigh temperature rise of the electric coil, high line construction cost, large occupied area and large construction difficulty of the vacuum pipeline in the prior art are solved.

Description

Double-line track beam with metal belt and single-pipe double-line vacuum pipeline

Technical Field

The invention relates to the technical field of magnetic suspension vacuum pipeline traffic systems, in particular to a double-line track beam with a metal belt and a single-pipe double-line vacuum pipeline.

Background

For mass transportation vehicles running at high speed, no matter an airplane or a high-speed rail, the main running resistance is air resistance, the air resistance limits the speed increase, and huge energy consumption is formed.

The vacuum pipeline is not in an absolute vacuum state actually, but air with certain density exists in the pipeline, the vehicle still has aerodynamic action when running in the pipeline, and the cross-sectional area of the pipeline cannot be much larger than the cross-sectional area of a train in consideration of the construction cost of the vacuum pipeline, so that the train has a blocking effect when running at high speed in the pipeline (the ratio of the cross-sectional area of the train to the cross-sectional area of the pipeline is called as a blocking ratio in the industry), the train is subjected to larger air resistance when running in the vacuum pipeline due to the blocking effect, and the air is compressed in front of the train to generate heat when the running speed of the train is higher. The magnetic levitation technology eliminates wheels and rails and mechanical friction, but one problem is that the coils of the electric appliance mounted on the rails generate heat during operation. In the vacuum pipeline, the air density is extremely low, the convection heat dissipation performance is extremely poor, and the heat accumulation is caused by pneumatic heating and coil heating, so that the temperature rise of a train, a pipeline and an electric appliance coil arranged on the pipeline is caused, and the energy and the service life of the electric appliance coil are influenced.

The inside and outside of the vacuum pipeline have a pressure difference of atmospheric pressure, which is about 10t per square meter of area, and the pressure difference is a very large load, the strength design of the vacuum pipeline needs to consider the pressure difference load in addition to the vertical load considered in the traditional track design, the huge air pressure difference load can form tensile stress on partial area of the outer surface of the vacuum pipeline, and the concrete used in large quantities in engineering can bear larger compressive stress but can hardly bear the tensile stress.

The magnetic suspension train is loaded with strong magnets, and the strong magnets can induce eddy currents in metal parts in the track along with the high-speed running of the train, so that resistance is formed on the high-speed running of the train.

The better the airtightness of the vacuum pipe, the lower the energy consumption required to maintain the vacuum state in the pipe, and therefore, in addition to the above requirements for heat dissipation, strength, turbulence, and the like of the vacuum pipe, a high airtightness is required.

In order to improve the transportation efficiency and reduce the line construction cost, two-way passing rails need to be built side by side together, and for vacuum pipeline transportation, two rails are built in the same vacuum pipeline, so that the resistance to stop can be effectively reduced, and the running resistance and pneumatic heat of a train are reduced.

In order to reduce the disturbance of electromagnetic force and aerodynamic force between two trains passing in two directions, two rails which are arranged side by side must have a certain distance (referred to as line spacing in the industry), and obviously, the mutual disturbance action is weaker when the line spacing is larger.

At present, the vacuum pipeline transportation has not been implemented and applied in an engineering way in the world, and from the technical scheme disclosed by relevant information at home and abroad, the basic structural characteristic is that an integral circular pipe structure is adopted, and two rails which pass in two directions are built at the bottom in the circular pipe, as shown in fig. 12.

The vacuum pipe of the integral circular pipe structure can very effectively cope with the load caused by the atmospheric pressure difference, as shown in fig. 13, and the airtightness is also excellent. However, the single-tube twin-line vacuum line of the prior art structure has several technical disadvantages as follows.

First, the strength properties of concrete materials and steel materials are not fully developed. The action load on the pipeline when a vehicle runs in the vacuum pipeline is mainly vertical, so that the section of the pipeline is required to have high bending rigidity in the vertical direction, the horizontal direction does not need too high rigidity, and the bending capacities of the whole circular steel pipe in the vertical direction and the horizontal direction are the same and unreasonable. In addition, the cross-sectional geometry of the concrete portion is limited by the geometry of the circular tube, and the strength performance of the concrete portion is not fully utilized due to unreasonable material distribution, i.e. the cost of steel and concrete materials for the vacuum pipe is high.

Second, construction at the overpass section is difficult. When the vacuum pipeline is used, the vacuum pipeline is made into a section with the length of dozens of meters, the vacuum pipeline is installed on a viaduct by using bridging equipment, the upper side of the pipeline of the whole circular pipe structure is arc-shaped, only one layer of steel plate is arranged, and the dead weight of a bridge girder erection machine cannot be borne, so that the engineering construction difficulty of the vacuum pipeline is high, and the problem of high construction cost is caused.

Thirdly, the line built by the pipeline occupies a large area. Because the transverse and vertical dimensions of the circular tube are the same, the diameter of the circular tube must be increased in order to increase the bending vertical rigidity, and the increase of the transverse dimension increases the occupied area of the vacuum pipeline circuit, which causes the increase of the line construction cost.

Fourthly, the heat dissipation design of the coil part is not considered in the pipeline, the thickness of the side wall of the track for mounting the electric coil is too large, the heat conducting performance of concrete is poor, the temperature of the coil is increased after the pipeline is used for a long time, and the insulation performance and the service life of the coil are further influenced.

Fifthly, the strong magnet is close to the pipe wall, the whole pipeline is designed according to the bearing requirement, the thickness of the pipe wall is large, the train can generate large eddy resistance when running at high speed, and the operation economy is not good.

Sixth, the whole circular pipe is very unfavorable for accident rescue, and when a fault or an accident occurs during train operation, the whole pipe cannot be opened, and an accident vehicle cannot be lifted.

Seventhly, in order to weaken the disturbance of electromagnetic force and aerodynamic force among the trains passing in two directions, when the line spacing needs to be increased, the width size of the section is increased, and meanwhile, the height size of the section is increased, so that the scale of the whole section is increased, and the line building cost is increased.

Disclosure of Invention

The invention provides a double-line track beam with a metal belt and a single-pipe double-line vacuum pipeline, which can solve the technical problems of low structural strength, overhigh temperature rise of an electric coil, high line construction cost, large floor area and high construction difficulty of the vacuum pipeline in the prior art.

According to an aspect of the present invention, there is provided a two-wire track beam having a metal band, the two-wire track beam being connected with a pipe upper structure to form a pipe body having an airtight vacuum pipe cavity, the two-wire track beam body structure comprising: the first rail comprises a first side wall, a second side wall and a first rail bottom structure, and the first rail bottom structure is arranged at the bottoms of the first side wall and the second side wall and is respectively connected with the first side wall and the second side wall; the second rail comprises a third side wall, a fourth side wall and a second rail bottom structure, the second rail bottom structure is arranged at the bottom of the third side wall and the bottom of the fourth side wall and is respectively connected with the third side wall and the fourth side wall, the first side wall, the second side wall, the third side wall and the fourth side wall are arranged in parallel, and the first rail and the second rail are used for the bidirectional passing of trains; each side wall comprises a plurality of reinforcing ribs, the reinforcing ribs of each side wall are arranged in a one-to-one correspondence mode respectively, the reinforcing ribs are sequentially arranged on one side, far away from the airtight vacuum pipeline cavity, of each side wall at intervals along the length direction of each side wall, a side wall groove is formed between any two adjacent reinforcing ribs, and the electric coil is arranged on one side, close to the airtight vacuum pipeline cavity, of each side wall; the connecting cover plate is arranged along the length direction of the double-line track beam and is used for connecting the upper part of the second side wall and the upper part of the third side wall, and the first track, the connecting cover plate, the second track and the upper structure of the pipeline enclose an airtight vacuum pipeline cavity; the metal band is used for bearing the tensile stress generated outside the reinforcing ribs of the first side wall, the first track bottom structure, the reinforcing ribs of the second side wall, the connecting cover plate, the reinforcing ribs of the third side wall, the reinforcing ribs of the second side wall, the reinforcing ribs of the third side wall, the second track bottom structure and the reinforcing ribs of the fourth side wall, and the metal band is used for bearing the tensile stress generated outside the reinforcing ribs of the first side wall, the first track bottom structure, the reinforcing ribs of the second side wall, the connecting cover plate, the reinforcing ribs of the third side wall, the second track bottom structure and the reinforcing ribs of the fourth side wall.

Further, the double-line track beam further comprises a plurality of rail bottom connecting beams, the rail bottom connecting beams are located on the lower portion of the double-line track beam and are sequentially arranged at intervals along the length direction of the double-line track beam, and each rail bottom connecting beam is connected with the first track and the second track respectively and used for enhancing the integrity and the torsional rigidity of the double-line track beam.

Furthermore, the double-line track beam further comprises a first heat conduction reinforcing piece, a second heat conduction reinforcing piece, a third heat conduction reinforcing piece and a fourth heat conduction reinforcing piece, wherein the first heat conduction reinforcing piece, the second heat conduction reinforcing piece, the third heat conduction reinforcing piece and the fourth heat conduction reinforcing piece are fixedly arranged on the metal belt, the first heat conduction reinforcing piece is located in the first side wall, the second heat conduction reinforcing piece is located in the second side wall, the third heat conduction reinforcing piece is located in the third side wall, the fourth heat conduction reinforcing piece is located in the fourth side wall, and any heat conduction reinforcing piece is used for enhancing the connection strength of the side wall corresponding to the heat conduction reinforcing piece and the metal belt and the heat dissipation performance of the corresponding side wall.

Further, each track bottom structure all has rail end cavity and air vent, and the rail end cavity sets up along each track bottom structure's length direction, and the air vent communicates with rail end cavity and gas tightness vacuum pipeline chamber respectively.

Furthermore, the double-line track beam also comprises a first protective cover plate and a second protective cover plate, the first protective cover plate is arranged on the vent hole of the first track bottom structure, and a first vent gap is formed between the first protective cover plate and the first track bottom structure; the second protective cover plate is arranged on the vent hole of the second track bottom structure, and a second vent gap is formed between the second protective cover plate and the second track bottom structure.

Furthermore, the first track bottom structure is provided with a plurality of vent holes which are sequentially arranged at intervals along the length direction of the first track bottom structure; the second track substructure has a plurality of air vents, and a plurality of air vents are arranged at intervals in sequence along the length direction of the second track substructure.

Furthermore, the first rail, the second rail and the connecting cover plate are made of concrete, the rail bottom connecting beam is made of reinforced concrete or carbon steel, the metal belt is made of carbon steel, and the first protective cover plate and the second protective cover plate are eddy current induction plates.

According to another aspect of the present invention, there is provided a single-pipe two-line vacuum pipe including a pipe upper structure and a two-line rail beam having a metal band, which are connected to form a pipe body, the rail beam structure having the metal band being the two-line rail beam having the metal band as described above.

Furthermore, the single-pipe double-line vacuum pipeline further comprises a reinforcing rib plate, the reinforcing rib plate is welded outside the upper structure of the pipeline, and the reinforcing rib plate is used for improving the rigidity and the strength of the upper structure of the pipeline and increasing the heat dissipation area of the single-pipe double-line vacuum pipeline.

By applying the technical scheme of the invention, the double-line track beam with the metal belt is provided, and the double-line track beam is connected with the upper structure of the pipeline to form an airtight vacuum pipeline cavity, namely a single pipe, so that the height size and the width size of the pipeline structure can be freely designed without mutual influence; two rails which pass in two directions are built in a single pipeline, so that the vertical rigidity of the bridge is increased, the line building cost is greatly reduced, the cross section area of the vacuum pipeline is increased, and the blocking ratio is reduced; through carrying out the structural design to each lateral wall, form the lateral wall recess between two arbitrary adjacent strengthening ribs, the lateral wall thickness of groove is thinner, and this kind of mode had both reduced the quantity of lateral wall material when guaranteeing intensity, had promoted and has built line economic nature, increased the heat conductivity of lateral wall again simultaneously, reduced electric coil's temperature. Moreover, the metal band is tightly attached to the outer side of the double-line track beam at the position of the reinforcing rib, the metal band and the track beam form a bearing structure together, the metal band is located on the outer side, the tensile stress of the outer sides of the first track, the second track and the connecting cover plate, which is caused by the action of atmospheric pressure difference load, can be borne, and the problem that the concrete material cannot bear the tensile stress is effectively solved. In addition, during construction of elevated road sections, the split vacuum pipeline structure provided by the invention is a split pipeline, so that the track beam structure positioned at the lower part can form a working route of a bridge girder erection machine during construction, and after the track beam structure is installed, the bridge girder erection machine is used for installing the upper structures of the pipelines in place one by one, so that the engineering construction is very convenient, and the line construction cost is low.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 shows a cross-sectional view at D-D of the two-wire track beam structure with metal strap provided in FIG. 5;

FIG. 2 shows a cross-sectional view at C-C of the two-wire track beam structure with metal strap provided in FIG. 5;

FIG. 3 is a schematic structural diagram illustrating a cross-section of a two-wire track beam structure having a metal strip exposed to atmospheric pressure according to an embodiment of the present invention;

FIG. 4 illustrates a partial top view of a two-wire track beam structure having a metal strap provided in accordance with a specific embodiment of the present invention;

FIG. 5 shows a cross-sectional view at A-A of the two-wire track beam structure with metal strap provided in FIG. 2;

FIG. 6 shows a partial cross-sectional view at B-B of the two-wire track beam structure with metal strap provided in FIG. 2;

FIG. 7 illustrates a partial cross-sectional view of a rail substructure provided in accordance with a specific embodiment of the present invention;

FIG. 8 illustrates a cross-sectional side view of a rail substructure provided in accordance with a specific embodiment of the present invention;

FIGS. 9 and 10 illustrate cross-sectional views of a single tube, two-wire vacuum line provided in accordance with a specific embodiment of the present invention;

FIG. 11 illustrates a partial side view of the single tube dual line vacuum conduit provided in FIG. 9;

FIG. 12 illustrates a cross-sectional view of a prior art single pipe two wire track pipe configuration;

fig. 13 shows a schematic diagram of a prior art single pipe two-wire rail pipe structure subjected to an atmospheric pressure distribution.

Wherein the figures include the following reference numerals:

10. a first track; 11. a first side wall; 12. a second side wall; 13. a first rail base structure; 20. a second track; 21. a third side wall; 22. a fourth side wall; 23. a second track bottom structure; 30. connecting the cover plate; 40. a metal strip; 50. the rail bottom is connected with the beam; 60. a first thermally conductive stiffener; 70. a second thermally conductive stiffener; 80. a third thermally conductive stiffener; 90. a fourth thermally conductive stiffener; 100. a first protective cover plate; 100a, a first vent slot; 110. a second protective cover plate; 110a, a second vent slot; 200. a double-track beam; 201. reinforcing ribs; 201a, a side wall groove; 202a, a rail bottom cavity; 202b, a vent hole; 203a, a heat dissipation gap; 300. a pipeline superstructure; 400. reinforcing rib plates; 500. an electric coil; 600. a connecting bolt; 700. a seal member; 800. a metal seal mating plate; 1000. a pipe body; 1000a, airtight vacuum pipeline cavity.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1 to 8, according to a specific embodiment of the present invention, there is provided a two-wire track beam having a metal band, which is connected with a pipe upper structure to form a pipe body having an airtight vacuum pipe cavity, so-called "mono-tube", the two-wire track beam body structure including a first track 10, a second track 20, a connection cover 30, and a plurality of metal bands 40, the first track 10 including a first sidewall 11, a second sidewall 12, and a first track bottom structure 13, the first track bottom structure 13 being disposed at the bottom of the first sidewall 11 and the second sidewall 12 and being connected with the first sidewall 11 and the second sidewall 12, respectively, to integrate the two; the second track 20 comprises a third side wall 21, a fourth side wall 22 and a second track bottom structure 23, the second track bottom structure 23 is arranged at the bottom of the third side wall 21 and the fourth side wall 22 and is respectively connected with the third side wall 21 and the fourth side wall 22 so as to connect the third side wall 21 and the fourth side wall 22 into a whole, the first side wall 11, the second side wall 12, the third side wall 21 and the fourth side wall 22 are arranged in parallel, and the first track 10 and the second track 20 are used for the bidirectional passing of trains; each side wall comprises a plurality of reinforcing ribs 201, the reinforcing ribs 201 of each side wall are arranged in a one-to-one correspondence mode respectively, the reinforcing ribs 201 are sequentially arranged on one side, far away from the airtight vacuum pipeline cavity, of each side wall at intervals along the length direction of each side wall, a side wall groove 201a is formed between any two adjacent reinforcing ribs 201, and the electric coil is arranged on one side, close to the airtight vacuum pipeline cavity, of each side wall; the connecting cover plate 30 is arranged along the length direction of the double-line track beam, the connecting cover plate 30 is used for connecting the upper part of the second side wall 12 and the upper part of the third side wall 21 so as to combine the two single-line tracks into a double-line track with air tightness, and the first track 10, the connecting cover plate 30, the second track 20 and the upper structure of the pipeline jointly form an air tightness vacuum pipeline cavity; the plurality of metal strips 40 are arranged in one-to-one correspondence with the plurality of reinforcing ribs 201 of any side wall, any metal strip 40 is arranged outside the reinforcing ribs of the first side wall 11, the first rail bottom structure 13, the reinforcing ribs of the second side wall 12, the connecting cover plate 30, the reinforcing ribs of the third side wall 21, the second rail bottom structure 23 and the reinforcing ribs of the fourth side wall 22 in a wrapping shape in a tight fit manner, and the metal strips 40 are used for bearing tensile stress generated outside the reinforcing ribs of the first side wall 11, the first rail bottom structure 13, the reinforcing ribs of the second side wall 12, the connecting cover plate 30, the reinforcing ribs of the third side wall 21, the second rail bottom structure 23 and the reinforcing ribs of the fourth side wall 22 due to the action of the difference of the internal and external atmospheric pressure of the double-line rail beam.

With this arrangement, a double-track beam with a metal strip is provided, which is connected to the upper structure of the pipeline to form a vacuum pipeline with air tightness, so-called "single pipe", in such a way that the height and width dimensions of the pipeline structure can be freely designed without affecting each other; two rails which pass in two directions are built in a single pipeline, so that the vertical rigidity of the bridge is increased, the line building cost is greatly reduced, the cross section area of the vacuum pipeline is increased, and the blocking ratio is reduced; through carrying out the structural design to each lateral wall, form the lateral wall recess between two arbitrary adjacent strengthening ribs, lateral wall thickness between the strengthening rib is thinner, and this kind of mode has both reduced the quantity of lateral wall material when guaranteeing intensity, has promoted and has built line economic nature, increases the heat conductivity of lateral wall again simultaneously, reduces electric coil's temperature. Moreover, the metal band is tightly attached to the outer side of the double-line track beam at the position of the reinforcing rib, the metal band and the track beam form a bearing structure together, the metal band is located on the outer side, the tensile stress of the outer sides of the first track, the second track and the connecting cover plate, which is caused by the action of atmospheric pressure difference load, can be borne, and the problem that the concrete material cannot bear the tensile stress is effectively solved. In addition, during construction of elevated road sections, the single-pipe double-line vacuum pipeline structure provided by the invention is a split type pipeline, so that a working line of a bridge girder erection machine can be formed by the track beam structure positioned at the lower part during construction, and after the track beam structure is installed, the bridge girder erection machine is used for installing the upper structures of the pipelines in place one by one, so that the construction is very convenient, and the line construction cost is low.

As an embodiment of the present invention, in order to be suitable for industrial applications and to improve the service life of the vacuum duct, the first rail 10, the second rail 20 and the connection cover 30 may be made of concrete, the upper structure of the duct may be made of steel, and the metal strip may be made of carbon steel. The side wall is provided with an electric coil 500, and the electric coil 500 generates heat during operation. In addition, since the vacuum pipe is subjected to atmospheric pressure all around, the side wall of each linear meter is subjected to side load of tens of tons. Therefore, the design of the side wall needs to consider both the strength and the heat dissipation performance, the side wall is designed into a reinforcing rib type structure, reinforcing ribs are uniformly designed on the outer side of the side wall along the vacuum pipeline, the reinforcing ribs bear the lateral load on the side wall, and the metal belt is positioned on the outer side of the reinforcing ribs, so that the problem that the concrete material cannot bear the tensile stress is solved well. The thickness of the concrete heat dissipation surface between the reinforcing ribs is thinner to enhance the heat dissipation performance of the electrical coil mounted on the side wall.

In this embodiment, the load acting on the vacuum pipe when the vehicle runs in the vacuum pipe is mainly vertical, so that the section of the vacuum pipe is required to have high bending rigidity in the vertical direction, and excessive rigidity is not required in the horizontal direction. The split vacuum pipeline structure provided by the invention is a split pipeline, so that the height and width of the pipeline structure can be freely designed, and on the basis, the bending rigidity of the pipeline in the vertical direction can be increased according to the rigidity requirement of the pipeline in the actual operation of a vehicle, so that more concrete materials are distributed in the vertical direction, and the strength performance of the materials is fully utilized.

Further, in the present invention, in order to enhance the torsional rigidity of the two-wire track beam, the two-wire track beam may be configured to further include a plurality of tie-down girders 50, the plurality of tie-down girders 50 being each located at a lower portion of the two-wire track beam and being sequentially spaced apart along a length direction of the two-wire track beam, and the respective tie-down girders 50 being connected to the first and second tracks 10 and 20, respectively, for enhancing the integrity and torsional rigidity of the two-wire track beam.

By applying the configuration mode, the two tracks of the double-track beam are arranged at intervals, the upper ends of the adjacent second side wall and third side wall are connected into a whole by the connecting cover plate 30, the lower ends of the second side wall and the third side wall are mutually connected by the rail bottom connecting beams 50 arranged at intervals, and the heat dissipation gap 203a is formed between the connecting cover plate 30 and the rail bottom connecting beams 50, so that the anti-torsion rigidity of the whole track beam structure is improved, the consumption of reinforced concrete is saved, and the heat dissipation performance of the track beam structure is enhanced. The metal band is tightly attached to the outer sides of the four reinforcing ribs, the track beam structure generates inward bending deformation under the action of atmospheric pressure (see figure 3), so that tensile stress is generated on the outer sides of the track beam structure, the metal band wraps the outer surfaces of the first track, the connecting cover plate and the second track, so that the tensile stress borne by the track beam under the action of atmospheric pressure is mainly borne by the metal band, and the metal material can bear the tensile stress which is much larger than that of concrete, so that the double-line track beam with the metal band can effectively solve the problem that the concrete material cannot bear the tensile stress.

As an embodiment of the present invention, the material of the tie beam 50 includes reinforced concrete or carbon steel, the heat generated by the electric coils 500 installed on the first and fourth sidewalls 11 and 22 during operation is transferred to the heat dissipation surfaces of the sidewalls, and the external cold air exchanges heat with the heat dissipation surfaces, so that the heat dissipation efficiency of the vacuum duct can be improved, and the temperature of the electric coils 500 can be reduced. The heat generated by the electric coils arranged on the second side wall 12 and the third side wall 21 in the working process is conducted to respective heat dissipation surfaces, and the plurality of rail bottom connection beams 50 are arranged at intervals, so that the heat dissipation surfaces can be communicated with the external cold air through the cavity between the connection cover plate 30 and the rail bottom connection beams 50, and the external cold air exchanges heat with the heat dissipation surfaces, so that the heat dissipation efficiency of the vacuum pipeline can be improved, and the temperature of the electric coils 500 is reduced.

Further, in the present invention, in order to enhance the connection strength between the side wall and the metal strip and the heat dissipation performance of the side wall, the dual-track beam may be configured to further include a first heat-conducting reinforcing member 60, a second heat-conducting reinforcing member 70, a third heat-conducting reinforcing member 80, and a fourth heat-conducting reinforcing member 90, wherein the first heat-conducting reinforcing member 60, the second heat-conducting reinforcing member 70, the third heat-conducting reinforcing member 80, and the fourth heat-conducting reinforcing member 90 are all fixedly disposed on the metal strip 40, the first heat-conducting reinforcing member 60 is located in the first side wall 11, the second heat-conducting reinforcing member 70 is located in the second side wall 12, the third heat-conducting reinforcing member 80 is located in the third side wall 21, and the fourth heat-conducting reinforcing member 90 is located in the fourth side wall 22, and any one of the heat-conducting reinforcing members is used to enhance the connection strength between the corresponding side wall and the metal strip 40 and the heat dissipation performance of the corresponding side wall.

As an embodiment of the present invention, each of the heat-conducting reinforcing members 50 includes a metal nail or a shear plate, and the metal nail (also called as a shear nail) or the shear plate is welded or riveted on the metal belt 40, and the metal nail or the shear plate can increase the heat-conducting property of the concrete, and the shear plate can further enhance the load action of the double-track beam against the atmospheric pressure. Wherein, the metal belt, the metal nail and the shear plate can be made of common carbon steel.

Further, in the present invention, in order to reduce the aerodynamic heat generated when the train operates at a high speed and reduce the aerodynamic resistance applied to the train, each of the rail bottom structures may be configured to have a rail bottom cavity 202a and a vent hole 202b, the rail bottom cavity 202a is disposed along the length direction of each of the rail bottom structures, and the vent hole 202b is respectively communicated with the rail bottom cavity 202a and the airtight vacuum pipe cavity 1000 a.

By applying the configuration mode, the rail bottom cavity 202a and the vent holes 202b are arranged in the bottom structure of each rail, and the rail bottom cavity 202a is communicated with the air-tight vacuum pipeline cavity 1000a through the vent holes 202b, so that the cross-sectional area of the vacuum pipeline is increased, the blocking effect is reduced, the pneumatic heat generated when the train runs at high speed is reduced, and the pneumatic resistance borne by the train is reduced.

In addition, in the present invention, since the rail bottom is a passage for the maintainers and the passengers to walk, for safety, the double-track beam may be configured to further include a first protective cover plate 100 and a second protective cover plate 110, the first protective cover plate 100 is disposed on the vent hole 202b of the first track bottom structure 13, and a first vent gap 100a is formed between the first protective cover plate 100 and the first track bottom structure 13; the second protective cover 110 is disposed over the vent hole 202b of the second track bottom structure 23, and a second vent gap 110a is provided between the second protective cover 110 and the second track bottom structure 23.

As an embodiment of the present invention, as shown in fig. 8, in order to simplify the vacuum duct structure and increase the compactness of the duct structure, a vortex induction plate for emergency braking of a train may be used as both the first protective cover plate 100 and the second protective cover plate 110, in such a manner that the gas in the vacuum duct and the gas in the rail foot cavity 202a can freely flow through the vent hole 202b and the first vent gap 100a (the second vent gap 110a) between the first protective cover plate 100 (the second protective cover plate 110) and the first rail foot structure 13 (the second rail foot structure 23).

In addition, in the present invention, in order to further reduce the aerodynamic heat generated by the train when the train runs at a high speed in the whole vacuum pipeline and reduce the aerodynamic resistance applied to the train, the first track bottom structure 13 may have a plurality of vent holes arranged in sequence at intervals along the length direction of the first track bottom structure 13; the second rail bottom structure 23 has a plurality of vent holes, which are sequentially arranged at intervals along the length direction of the second rail bottom structure 23.

Further, in the present invention, in order to improve the air-tightness of the rail girder structure, the rail girder structure may be configured to further include an air-tightness coating layer coated on the outer sides of the first rail 10, the second rail 20, the connection cover 30, and the plurality of metal strips 40. As a specific embodiment of the present invention, the airtight coating layer includes asphalt, sheet iron, and the like.

According to another aspect of the present invention, there is provided a single-pipe two-wire vacuum duct, as shown in fig. 9 to 11, which includes a duct upper structure 300 and a two-wire track beam 200 having a metal band, the duct upper structure 300 and the two-wire track beam 200 having a metal band being connected to form a duct body, the track beam structure having a metal band 40 being the two-wire track beam 200 having a metal band as described above. Since the double-track beam with the metal band has the advantages of high strength, low line construction cost, small floor area, good heat conductivity and easy construction, the double-track beam with the metal band 200 is applied to a vacuum pipeline, the construction cost of the vacuum pipeline can be greatly reduced, and the service performance is improved.

Further, in the present invention, in order to improve the strength of the vacuum pipe structure and increase the heat dissipation area of the split vacuum pipe structure, the single-pipe double-line vacuum pipe may be configured to further include a reinforcing rib plate 400, the reinforcing rib plate 400 is welded to the outside of the pipe superstructure 300, and the reinforcing rib plate 400 is used to improve the strength of the pipe superstructure 300 and increase the heat dissipation area of the single-pipe double-line vacuum pipe. As an embodiment of the present invention, a steel plate may be used as the reinforcing plate 400, and the reinforcing plate is welded to the pipe body.

In addition, in the present invention, in order to further improve the strength of the single-pipe double-line vacuum pipe and increase the heat dissipation area of the single-pipe double-line vacuum pipe, the single-pipe double-line vacuum pipe may be configured to include a plurality of reinforcing rib plates 400, and the plurality of reinforcing rib plates 400 are spaced apart from each other along the length direction of the pipe body and are disposed on the pipe upper structure 300. As an embodiment of the present invention, a steel plate may be used as the stiffener plate 400, and as shown in fig. 11, the single-pipe double-line vacuum pipe includes a plurality of steel plates welded to the pipe superstructure 300 at regular intervals along the length direction of the pipe body. The mode can save the steel consumption, can increase the rigidity and the intensity of components of a whole that can function independently vacuum pipe structure simultaneously, and in addition, the reinforcing rib plate structure can also increase the heat radiating area of pipeline, plays the effect of heat dissipation grid.

Further, in the present invention, in order to ensure the working performance of the single-pipe double-line vacuum pipe and prevent the air leakage of the vacuum pipe structure during the working process, the single-pipe double-line vacuum pipe may be configured to further include a sealing member 700 and a metal sealing fitting plate 800, the sealing member 700 and the metal sealing fitting plate 800 are both disposed at the connection position of the pipe upper structure and the rail beam structure, the sealing member 700 is used to achieve the sealing connection between the pipe upper structure and the rail beam structure, and the metal sealing fitting plate 800 is used to achieve the sealing fitting between the sealing member 700 and the rail beam structure.

By applying the configuration mode, the sealing element is arranged at the connecting position of the upper structure of the pipeline and the track beam structure, so that air leakage can be effectively prevented when the vacuum pipeline is vacuumized and a subsequent vehicle runs in the vacuum pipeline, and the working performance of the vacuum pipeline is improved. As an embodiment of the present invention, a rubber strip may be used as the sealing member 700, in this way, after the vacuum pipe is vacuumized, the pipe superstructure 300 is tightly pressed on the lower track beam structure 200 by the sealing rubber strip structure under the action of thousands of tons of air pressure, so as to achieve a very good sealing effect, and the atmospheric pressure may generate tens of tons of downward pressure on the superstructure 300 per meter length, so that the sealing strip structure is tightly pressed on the lower double-track beam 200, thereby achieving a very good sealing effect. As other embodiments of the present invention, other low stiffness, hermetic materials may be used for the seal 700.

For a further understanding of the present invention, the double-track beam with metal belt and the single-tube double-track vacuum pipe according to the present invention will be described in detail with reference to fig. 1 to 11.

As shown in fig. 1 to 11, according to an embodiment of the present invention, a rail beam structure having a metal band and a single-pipe double-line vacuum pipe are provided, the rail beam structure 200 and the pipe upper structure 300 are connected by using a connecting bolt 600 to form a pipe body 1000, a sealing strip is used between the rail beam structure 200 and the pipe upper structure 300 for sealing, the pipe body 1000 has an airtight vacuum pipe cavity 1000a, the pipe upper structure 300 is formed by stamping a steel plate into a semicircular arch structure, and then a plurality of reinforcing ribs 400 are welded along a longitudinal direction of the pipe, so that the amount of steel is saved while the rigidity and strength of the structure are increased, and the reinforcing ribs also increase the heat dissipation area of the pipe to function as a heat dissipation grid.

The double-track beam body structure comprises a first track 10, a second track 20, a connecting cover plate 30, a plurality of metal strips 40 and a plurality of rail-bottom connecting beams 50, wherein the first track 10 comprises a first side wall 11, a second side wall 12 and a first track bottom structure 13, and the first track bottom structure 13 is arranged at the lower parts of the first side wall 11 and the second side wall 12 so as to connect the first side wall 11 and the second side wall 12 into a whole; the second track 20 comprises a third side wall 21, a fourth side wall 22 and a second track bottom structure 23, the second track bottom structure 23 is arranged at the lower part of the third side wall 21 and the fourth side wall 22 to connect the third side wall 21 and the fourth side wall 22 into a whole, the first side wall 11, the second side wall 12, the third side wall 21 and the fourth side wall 22 are arranged in parallel, and the first track 10 and the second track 20 are used for the bidirectional passing of trains. The connection cover plate 40 is used for connecting the side wall 12 on the first rail 10 with the third side wall 21 of the second rail 20, thereby combining the two single-line rails into a double-line rail with air-tight performance; each lateral wall all includes a plurality of strengthening ribs 201, and a plurality of strengthening ribs 201 of each lateral wall respectively one-to-one sets up, and a plurality of strengthening ribs 201 set up the one side of keeping away from the gas tightness vacuum pipe chamber at each lateral wall along the length direction of each lateral wall interval in proper order, form lateral wall recess 201a between two arbitrary adjacent strengthening ribs 201, and electric coil installs the one side that is close to the gas tightness vacuum pipe chamber at each lateral wall.

The connecting cover plate 30 is arranged along the length direction of the double-line track beam, the connecting cover plate 30 is used for connecting the upper part of the second side wall 12 and the upper part of the third side wall 21, the first track 10, the connecting cover plate 30, the second track 20 and the upper structure of the pipeline together enclose an airtight vacuum pipeline cavity, any metal belt 40 is arranged on the outer sides of the reinforcing ribs of the first side wall 11, the reinforcing ribs of the first track bottom structure 13 and the second side wall 12, the reinforcing ribs of the connecting cover plate 30 and the third side wall 21, the reinforcing ribs of the second track bottom structure 23 and the reinforcing ribs of the fourth side wall 22, the metal tape 40 is used to take tensile stress generated outside the reinforcing ribs of the first side wall 11, the first rail bottom structure 13, the reinforcing ribs of the second side wall 12, the reinforcing ribs connecting the cover plate 30, the third side wall 21, the second rail bottom structure 23, and the reinforcing ribs of the fourth side wall 22 due to the difference in atmospheric pressure between the inside and the outside of the two-wire rail beam. The plurality of tie beams 50 are located at the lower part of the double-track beam and are sequentially arranged at intervals along the length direction of the double-track beam, and each tie beam 50 is connected with the first track 10 and the second track 20 respectively for enhancing the integrity and torsional rigidity of the double-track beam.

In the present embodiment, in the manufacturing process of the track beam structure, a plurality of W-shaped metal strips are first made by cutting, welding and sheet metal of metal plates, and reinforced concrete is poured into the W-shaped metal strips (and the concrete cast slabs) to form the double-track beam with the metal strips. The four side walls are structurally designed, the reinforcing ribs are arranged at intervals along the longitudinal direction of the track, lateral loads caused by atmospheric pressure difference are mainly borne by the reinforcing ribs, and the side walls between the reinforcing ribs are thinner, so that the using amount of reinforced concrete is reduced on one hand, and the heat conducting performance of the side walls is enhanced on the other hand.

The metal belt is tightly attached to the outer sides of the four reinforcing ribs, the track beam structure is deformed by bending inwards under the action of atmospheric pressure (see figure 3), so that tensile stress is generated on the outer sides of the track beam structure, the tensile stress borne by the track beam under the action of atmospheric pressure is mainly borne by the metal belt due to the fact that the metal belt wraps the outer surfaces of the first track, the connecting cover plate and the second track, and the metal material can bear the tensile stress which is much larger than that of concrete, so that the track beam with the metal belt structure can effectively solve the problem that the concrete material cannot bear the tensile stress. .

In order to reduce the mutual aerodynamic and electromagnetic disturbances between the trains running on the two tracks, the line spacing must be greater than a certain value, so that a space is formed between the second and third side walls 12 and 21, the upper ends of the second and third side walls 12 and 21 are connected by a continuously disposed connection cover 30 in order to ensure the air tightness of the track beam, and additionally, the tie-beams 50 of the railings, which are disposed at intervals at the lower ends of the second and third side walls 12 and 21, are connected to each other in order to enhance the torsional rigidity of the two-wire track beam. The second side wall 12, the third side wall 21, the connecting cover plate 30 and the tie beams form a heat dissipation gap 203a, and since the tie beams 50 are spaced apart, the heat dissipation gap 203a is communicated with the atmosphere for heat dissipation.

In order to increase the bending rigidity of the track bottom structure against the action of atmospheric pressure and reduce the cost of track beams, the track bottom structure is designed into a cavity structure. In order to increase the bonding strength between the concrete and the metal strips, metal nails (referred to as shear nails in the industry) or shear plates can be welded or riveted on the metal strips, the shear nails or the shear plates can simultaneously increase the heat-conducting property of the concrete, and the shear plates can further enhance the load effect of the double-line track beam against the atmospheric pressure. The metal strips, shear pins and shear plates may be of plain carbon steel. In order to facilitate connection and sealing with the pipe superstructure 300, the connection bolts 600 and the metal seal-fitting plate 800 are embedded in the connection portions.

The vent holes 202b are designed on the upper part of the rail bottom cavity 202a of the rail bottom structure of the lower rail beam structure, so that the rail bottom cavity 202a and the airtight vacuum pipeline cavity 1000a are communicated with each other, and the design is equivalent to increase the cross-sectional area of a vacuum pipeline, so that the blocking effect of the train in operation is reduced.

Because the rail bottom structure is used as a walking channel for maintainers and escape passengers, a cover plate is required on the vent holes 202b for safety, and a vortex sensing plate used for emergency braking of trains can be used as the cover plate, so that air in the vacuum pipeline and air in the rail bottom cavity 202a can freely flow through the vent holes 202b and vent gaps between the cover plate 70 and the rail bottom structure.

The track beam structure 200 is connected with the pipeline upper structure 300 through the connecting bolts 600, the connecting bolts 600 are embedded in the concrete structure at the lower part, holes are drilled in the steel structure at the upper part according to the actual test of the space size of the connecting bolts 600, the gap between the connecting bolts 600 and the bolt holes is controlled, the connecting rigidity of the upper part and the lower part is enhanced, and the bearing integrity of the pipeline is improved.

In this embodiment, the sealing strip is used as a sealing element, the sealing strip is made of low-rigidity and sealing materials such as rubber, and after the interior of the pipeline is vacuumized, atmospheric pressure can generate tens of tons of downward pressure on the upper structure 300 of the pipeline with the length of each meter, so that the sealing strip structure is tightly pressed on the lower double-line track beam structure 200, and a very good sealing effect can be achieved.

In summary, the present invention provides a twin-line track beam with a metal strip and a single-pipe twin-line vacuum pipe, which have the following advantages compared to the prior art.

Firstly, four side walls of the double-line track beam are designed into a reinforcing rib structure, the outer surface of each reinforcing rib is tightly attached with a W-shaped metal belt, the metal belts on the outer sides and the reinforced concrete form a bearing structure together, and the metal belts are positioned on the outer sides of the track beam and bear tensile stress generated on the outer side surfaces of the track beam under the action of atmospheric pressure difference, so that the problem that the reinforced concrete cannot bear the tensile stress is effectively solved.

Secondly, the two rails of the double-line rail beam are arranged at intervals, the upper ends of the adjacent side walls of the double-line rail beam are connected into a whole through the connecting cover plate, the lower ends of the side walls are connected with each other through the rail bottom connecting beams arranged at intervals, and a heat dissipation gap is formed between the connecting cover plate and the rail bottom connecting beams, so that the torsional rigidity of the whole rail beam is improved, the consumption of reinforced concrete is saved, and the heat dissipation performance of the rail beam is enhanced.

Thirdly, the airtight coating layer is laid on the outer side of the track beam, and the airtight coating layer comprises asphalt, sheet iron and the like, so that the airtight performance of the vacuum pipeline is enhanced.

Fourthly, the side wall structure for installing the electric coil adopts a structural design, the side wall between the reinforcing ribs is thinner, the consumption of reinforced concrete is reduced, the cost of the track beam is reduced, and meanwhile, the heat conducting performance of the side wall is enhanced.

Fifthly, the rail bottom structure of the double-line rail beam is designed to be a cavity structure, and the cavity is communicated with the air-tight vacuum pipeline cavity, so that the cross-sectional area of the vacuum pipeline is increased, and the blocking effect is reduced, thereby reducing the aerodynamic heat generated when the train runs at high speed and reducing the aerodynamic resistance of the train.

Sixth, the single-tube double-line vacuum pipeline of the invention is formed by connecting the pipeline upper structure and the double-line track beam, the height and width of the single-tube double-line vacuum pipeline can be designed freely without affecting each other, the height of the cross section can not be increased while the width of the cross section is increased for increasing the line spacing, and the line building cost can not be increased in a large scale.

Seventh, the single-pipe double-line vacuum pipeline of the invention is also very convenient in construction of elevated road sections, firstly, the concrete structures at the lower parts are sequentially hoisted to piers by using a bridge girder erection machine, the lower parts of the concrete structures form the working lines of the bridge girder erection machine, and then the bridge girder erection machine is used to install the upper parts of the concrete structures in place one by one after the lower parts of the concrete structures are installed, so that the construction is very convenient.

Eighth, the single-pipe double-line vacuum pipeline is very beneficial to accident rescue, and because the upper part and the lower part of the vacuum pipeline are connected through bolts, rescue work such as lifting accident vehicles can be carried out after the upper part of the vacuum pipeline is disassembled.

Ninth, because the binding metal strips on the outer surface of the lower track beam reinforcing rib are arranged at intervals along the longitudinal direction of the track beam, a whole metal conductor is not formed, and the eddy resistance of the maglev train in high-speed operation can be effectively reduced.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A two-wire track beam with metal straps, wherein the two-wire track beam is connected with a pipe superstructure to form a pipe body having an airtight vacuum pipe cavity, the two-wire track beam comprising:

a first rail (10), the first rail (10) comprising a first side wall (11), a second side wall (12) and a first rail bottom structure (13), the first rail bottom structure (13) being disposed at the bottom of the first side wall (11) and the second side wall (12) and being connected with the first side wall (11) and the second side wall (12), respectively;

a second rail (20), wherein the second rail (20) comprises a third side wall (21), a fourth side wall (22) and a second rail bottom structure (23), the second rail bottom structure (23) is arranged at the bottom of the third side wall (21) and the fourth side wall (22) and is respectively connected with the third side wall (21) and the fourth side wall (22), the first side wall (11), the second side wall (12), the third side wall (21) and the fourth side wall (22) are arranged in parallel, and the first rail (10) and the second rail (20) are used for allowing trains to pass in two directions; each side wall comprises a plurality of reinforcing ribs (201), the reinforcing ribs (201) of each side wall are arranged in a one-to-one correspondence mode respectively, the reinforcing ribs (201) are sequentially arranged on one side, far away from the airtight vacuum pipeline cavity, of each side wall at intervals along the length direction of each side wall, a side wall groove (201 a) is formed between any two adjacent reinforcing ribs (201), and an electric coil is arranged on one side, close to the airtight vacuum pipeline cavity, of each side wall;

the connecting cover plate (30) is arranged along the length direction of the double-line track beam, the connecting cover plate (30) is used for connecting the upper portion of the second side wall (12) and the upper portion of the third side wall (21), and the first track (10), the connecting cover plate (30), the second track (20) and the pipeline upper structure jointly enclose the airtight vacuum pipeline cavity;

a plurality of metal strips (40), it is a plurality of metal strip (40) and arbitrary a plurality of strengthening ribs (201) one-to-one setting of lateral wall, arbitrary metal strip (40) closely laminate the setting and are in the strengthening rib of first lateral wall (11), first track bottom structure (13), the strengthening rib of second lateral wall (12), connect apron (30), the strengthening rib of third lateral wall (21), second track bottom structure (23) and the outside of the strengthening rib of fourth lateral wall (22), metal strip (40) are used for undertaking by the inside and outside atmospheric pressure difference effect of two-wire track roof beam leads to the strengthening rib of first lateral wall (11), first track bottom structure (13), the strengthening rib of second lateral wall (12), connect apron (30), the strengthening rib of third lateral wall (21), second track bottom structure (23) and the produced outside of the strengthening rib of fourth lateral wall (22) Tensile stress of (2).

2. The double-track beam with metal belt according to claim 1, further comprising a plurality of tie-down beams (50), the plurality of tie-down beams (50) being located at a lower portion of the double-track beam and being sequentially spaced apart along a length direction of the double-track beam, each tie-down beam (50) being connected to the first track (10) and the second track (20), respectively, for enhancing integrity and torsional rigidity of the double-track beam.

3. The bifilar track beam as claimed in claim 2, further comprising a first (60), a second (70), a third (80) and a fourth (90) thermally conductive reinforcements, wherein the first (60), the second (70), the third (80) and the fourth (90) thermally conductive reinforcements are all fixedly disposed on the metal strap (40), the first thermally conductive reinforcement (60) is located in the first sidewall (11), the second thermally conductive reinforcement (70) is located in the second sidewall (12), the third (80) is located in the third sidewall (21), the fourth (90) is located in the fourth sidewall (22), and any one of the thermally conductive reinforcements is used for enhancing the connection strength and the pair of the corresponding sidewall to the metal strap (40) The heat dissipation performance of the corresponding side wall.

4. The two-wire track beam with metal tape of claim 3, wherein each of the track bottom structures has a rail bottom cavity (202 a) and a vent hole (202 b), the rail bottom cavity (202 a) being disposed along a length direction of each of the track bottom structures, the vent hole (202 b) being in communication with the rail bottom cavity (202 a) and the airtight vacuum pipe cavity, respectively.

5. The double-track beam with metal strip according to claim 3, characterized in that it further comprises a first protective cover plate (100) and a second protective cover plate (110), said first protective cover plate (100) being arranged on the vent hole (202 b) of the first track bottom structure (13), said first protective cover plate (100) and said first track bottom structure (13) having a first vent gap (100 a) therebetween; the second protective cover plate (110) is arranged on the vent hole (202 b) of the second rail bottom structure (23), and a second vent gap (110 a) is formed between the second protective cover plate (110) and the second rail bottom structure (23).

6. The double-track beam with metal strips as claimed in claim 5, characterised in that said first track bottom structure (13) has a plurality of said ventilation holes, which are arranged in sequence at intervals along the length of said first track bottom structure (13); the second track bottom structure (23) is provided with a plurality of the vent holes which are sequentially arranged at intervals along the length direction of the second track bottom structure (23).

7. The double-track rail beam with metal strips as claimed in claim 5, wherein the material of the first track (10), the second track (20) and the connecting cover plate (30) comprises concrete, the material of the railbed connecting beam (50) comprises reinforced concrete or carbon steel, the material of the metal strips (40) comprises carbon steel, and the first protective cover plate (100) and the second protective cover plate (110) are eddy current induction plates.

8. A single-tube two-wire vacuum pipe, characterized in that it comprises a pipe superstructure (300) and a metal-belted two-wire track beam (200), said pipe superstructure (300) and said metal-belted two-wire track beam (200) being connected to form a pipe body, said metal-belted two-wire track beam (200) being a metal-belted two-wire track beam (200) according to any one of claims 1 to 7.

9. The single-pipe twin-line vacuum pipe according to claim 8, further comprising a stiffener plate (400), wherein the stiffener plate (400) is welded to an outside of the pipe superstructure (300), and the stiffener plate (400) is used to improve rigidity and strength of the pipe superstructure (300) and increase a heat dissipation area of the single-pipe twin-line vacuum pipe.

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