CN112112005B - Hollow-out type double-line track beam body structure and split type vacuum pipeline with same - Google Patents

Abstract

The invention provides a hollowed-out double-line track beam body structure and a split type vacuum pipeline with the same, wherein a pipeline body is provided with an air-tight vacuum pipeline cavity, and the hollowed-out double-line track beam body structure comprises: a first rail including a first sidewall and a second sidewall; the first side wall, the second side wall, the third side wall and the fourth side wall are arranged in parallel, and the first track and the second track are used for the train to pass in two directions; each side wall comprises an outer side wall and an inner side wall, a side wall cavity along the length direction of each side wall is formed between the outer side wall and the inner side wall, an electric coil is arranged on the inner side wall, ventilation windows are arranged on the outer side wall at intervals, and the ventilation windows are communicated with the side wall cavities. By applying the technical scheme of the invention, the technical problems of overhigh temperature rise, high construction cost, large floor area and large construction difficulty of the electric coil of the double-line pipeline circuit in the prior art are solved.

Description

Hollow-out type double-line track beam body structure and split type vacuum pipeline with same

Technical Field

The invention relates to the technical field of magnetic suspension vacuum pipeline traffic systems, in particular to a hollow-out type double-line track beam body structure and a split type vacuum pipeline with the hollow-out type double-line track beam body structure.

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 so-called vacuum pipe is not in an absolute vacuum state in fact, but air with certain density exists in the pipe, the vehicle still has aerodynamic action when running in the pipe, and considering the construction cost of the vacuum pipe, the cross-sectional area of the pipe cannot be much larger than that of the train, so that the train has a 'blocking' effect when running at high speed in the pipe (the ratio of the cross-sectional area of the train to the cross-sectional area of the pipe is called as a blocking ratio in the industry), the train is subjected to larger air resistance when running in the vacuum pipe due to the blocking effect, and the air is compressed in front of the train at higher running speed of the train to generate heat, and the heat can cause the surface temperature of the pipe and the train to rise, thereby affecting the performance of related electrical equipment and mechanical structures.

The magnetic suspension technology cancels wheels and steel rails, eliminates mechanical friction, but brings about a problem that electric coils arranged on the rails can generate heat in the working process, and the heat generated by the electric coils is difficult to dissipate due to extremely low air density and extremely poor convection heat dissipation performance in a vacuum pipeline, so that the temperature rise of the coils is caused, and the insulation performance and the service life of the coils are influenced.

In addition, in order to meet the requirements of high-speed operation and 'quick start and stop', the magnetic suspension train adopts a light-weight design, the acting load (called as 'live load' in the rail engineering industry) on the rail is small, but because an air pressure difference of one atmosphere exists between the inside and the outside of a vacuum pipeline, the main coping load of the rail pipe structure design is the atmospheric pressure load.

At present, the vacuum pipeline transportation does not enter the engineering implementation and application stage worldwide, and from the technical solutions disclosed in the related information at home and abroad, the conventional common double-line pipeline structure is specifically shown in fig. 9 to 13, wherein fig. 9 and 10 show the structure of a vertically arranged double-line vacuum pipeline, and fig. 11 and 12 show the structure of a horizontally arranged double-line vacuum pipeline. The cross section shapes of the two types of double-line vacuum pipelines are two complete circular pipe structures, the basic structure of each large circular pipe is characterized in that a whole circular pipe structure is adopted to form a sealed and sealed space, a rail is built at the bottom in the circular pipe, specifically, as shown in figure 13, the vacuum pipeline of the circular pipe structure is not beneficial to improving the vertical rigidity of the cross section, the occupied area in the horizontal direction is large, the pipeline erection difficulty is large, the two circular pipe structures are horizontally or vertically arranged, only piers are shared, and the construction investment cost of the vacuum pipeline is high.

The two-wire vacuum line of the prior art construction suffers from several technical disadvantages.

First, the large circular pipes forming the two pipelines can only share the bridge pier, the bridge part cannot share the bridge pier, and the construction cost of the bridge pier can only be saved by comparing with two single lines.

Second, the strength properties of concrete materials and steel are not fully exploited for each pipe. 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 section geometry of the concrete part cannot be designed too high due to the limitation of the round pipe, more materials are distributed in the horizontal direction, the vertical rigidity of the pipeline is insufficient, the horizontal rigidity is excessive, and the strength performance of the materials is not fully utilized.

Thirdly, construction at elevated bridge sections is difficult. The vacuum pipeline is made into a section with the length of dozens of meters when in use, 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, the dead weight of a bridge girder erection machine cannot be borne, particularly the double-line pipeline form which is vertically arranged is more difficult to construct, and the construction cost is high as a result of the great difficulty in engineering construction.

Fourth, the line footprint of such two-wire duct construction is large. Particularly, in the form of a double-line pipeline arranged horizontally, because the transverse and vertical dimensions of each large circular pipe are the same, in order to increase the bending vertical rigidity, the diameter of the circular pipe must be increased, and the increase of the transverse dimension increases the floor area of the vacuum pipeline circuit, thereby increasing the cost of the line construction.

Fifthly, because the cross-sectional area of each pipeline is limited, a remarkable 'blocking' effect exists when the train runs, the running resistance is large, and the temperature in the pipeline rises violently due to pneumatic action. If the blocking effect is reduced by increasing the sectional area of the pipeline, the pipe diameter must be increased, and the construction cost of the line must be increased.

And sixthly, each pipeline does not consider how to structurally design the concrete part, and the thickness of the side wall and the thickness of the bottom of the track are both made of solid reinforced concrete, so that the using amount of the concrete is increased, and the cost is increased.

Seventhly, each pipeline does not structurally design the concrete track beam part, the thickness of the track side wall for mounting the electric coil is too large, the heat conducting property of the concrete is poor, the temperature of the coil is increased after the pipeline is used for a long time, and the insulating property and the service life of the coil are further influenced.

Eighth, if the blockage ratio of each pipeline is reduced, the diameter of the steel large round pipe can be increased, so that the dead weight and the floor area of the pipeline are increased, and the line building cost is further increased.

Disclosure of Invention

The invention provides a hollowed-out double-line track beam body structure and a split type vacuum pipeline with the hollowed-out double-line track beam body structure, which can solve the technical problems of overhigh temperature rise, high construction cost, large floor area and large construction difficulty of an electric coil of a double-line pipeline circuit in the prior art.

According to an aspect of the present invention, there is provided a hollowed-out type double-track girder structure connected with a pipeline upper structure to form a pipeline body, the pipeline body having an airtight vacuum pipeline cavity, the hollowed-out type double-track girder structure comprising: a first rail including a first sidewall and a second sidewall; 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 train to pass in two directions; each side wall comprises an outer side wall and an inner side wall, a side wall cavity is formed between the outer side wall and the inner side wall along the length direction of each side wall, an electric coil is arranged on the inner side wall, ventilation windows are arranged on the outer side wall at intervals, and the ventilation windows are communicated with the side wall cavities.

Further, first track and second track interval set up, fretwork formula double-line track roof beam body structure still including connecting the apron, connect the apron and set up along the length direction of fretwork formula double-line track roof beam body structure in succession, connect the apron and be used for connecting the upper portion of second lateral wall and the upper portion of third lateral wall, first track, connection apron, second track and pipeline superstructure enclose into gas tightness vacuum pipe chamber jointly.

Furthermore, fretwork formula double-line track roof beam body structure still includes a plurality of railways end connection roof beam, and a plurality of railways end connection roof beams all are located the lower part of fretwork formula double-line track roof beam body structure and set up along fretwork formula double-line track roof beam body structure's length direction interval in proper order, and each railways end connection roof beam all is located between first track and the second track in order to be used for the reinforcing first track with the orbital antitorque commentaries on classics rigidity of second.

Further, each side wall comprises a plurality of ventilation windows, the ventilation windows are arranged on the outer side wall along the length direction of each side wall at intervals, and the ventilation windows are communicated with the side wall cavity.

Further, the first rail further comprises a first rail bottom structure disposed between the first side wall and the second side wall; the second rail further comprises a second rail bottom structure disposed between the third sidewall and the fourth sidewall; each track bottom structure all has rail end cavity and air vent, and the rail end cavity sets up in succession along each track bottom structure's length direction, and the air vent communicates with rail end cavity and gas tightness vacuum pipeline chamber respectively.

First track bottom structure and second track bottom structure all have a plurality of air vents, and a plurality of air vents set up in proper order at intervals along the length direction of each track bottom structure in order to carry out the air current UNICOM with rail end cavity and gas tightness vacuum pipe chamber.

Further, the hollowed-out double-track beam body structure further 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.

Further, the hollowed-out double-track beam body structure further comprises a heat conducting element, and the heat conducting element is arranged between the electric coil and the inner-layer side wall.

Further, the material of pipeline superstructure includes steel, and the material of fretwork formula double-line track roof beam body structure includes the concrete, and first protection apron and second protection apron are vortex induction plate.

According to another aspect of the present invention, a split type vacuum pipeline is provided, the split type vacuum pipeline includes a pipeline upper structure and a hollowed-out double-track beam structure, the pipeline upper structure and the hollowed-out double-track beam structure are connected to form a pipeline body, and the hollowed-out double-track beam structure is the hollowed-out double-track beam structure as described above.

By applying the technical scheme, the hollow-out type double-line track beam body structure is connected with the upper structure of the pipeline to provide an airtight vacuum pipeline environment, so that the height and width of the pipeline structure can be freely designed without mutual influence, and the occupied area is small; 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 fretwork formula double-line track roof beam body structure, each lateral wall all designs for inside and outside two-layer cavity structure, and the interval sets up ventilation window on outer lateral wall, and this kind of mode makes the thickness of ectonexine lateral wall attenuate greatly, has alleviateed the structure dead weight, has promoted the economic nature of building the line, increases the thermal diffusivity of track roof beam body structure simultaneously again, reduces electric coil's temperature. In addition, during construction of the elevated road section, the split vacuum pipeline structure provided by the invention is a split pipeline, so that the hollow double-track beam structure at the lower part can form a working line of a bridge girder erection machine during construction, and after the hollow double-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 and 2 show cross-sectional views of a split vacuum duct provided according to a specific embodiment of the present invention;

FIG. 3 shows a side view of the split vacuum duct provided in FIG. 1;

FIG. 4 shows a top cross-sectional view at A-A of the split vacuum line provided in FIG. 1;

FIG. 5 shows a top cross-sectional view at B-B of the split vacuum duct provided in FIG. 1;

FIG. 6 shows a top cross-sectional view at C-C of the split vacuum duct provided in FIG. 1;

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

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

FIG. 9 shows a cross-sectional view of a vertically aligned twin-line vacuum line as provided in the prior art;

FIG. 10 shows a left side view of the vertically aligned twin-line vacuum line provided in FIG. 9;

FIG. 11 shows a cross-sectional view of a horizontally arranged two-wire vacuum line as provided in the prior art;

FIG. 12 shows a left side view of the horizontally arranged two-wire vacuum line provided in FIG. 11;

figure 13 shows a cross-sectional view of any one of the vacuum round tubes in a twin wire vacuum line provided in the prior art.

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. the rail bottom is connected with the beam; 50. a first protective cover plate; 50a, a first vent slot; 60. a second protective cover plate; 60a, a second vent slot; 70. a heat conducting element; 80. mounting bolts on the cover plate; 100. a hollow double-track beam structure; 100a, a sidewall cavity; 100b, a ventilation window; 100c, rail foot cavity; 100d, vent holes; 101. an outer layer sidewall; 102. an inner layer sidewall; 200. a pipeline superstructure; 300. reinforcing rib plates; 400. an electric coil; 500. a hermetic coating; 600. a connecting bolt; 700. a seal member; 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 an embodiment of the present invention, there is provided a hollowed-out type two-line rail beam structure, the hollowed-out type two-line rail beam structure 100 is connected with a pipe upper structure 200 to form a pipe body 1000, the pipe body 1000 has an airtight vacuum pipe cavity 1000a, the hollowed-out type two-line rail beam structure 100 includes a first rail 10 and a second rail 20, the first rail 10 includes a first sidewall 11 and a second sidewall 12; the second track 20 comprises a third side wall 21 and a 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 track 10 and the second track 20 are used for allowing trains to pass in two directions; each side wall comprises an outer layer side wall 101 and an inner layer side wall 102, a side wall cavity 100a is formed between the outer layer side wall 101 and the inner layer side wall 102 along the length direction of each side wall, an electric coil is arranged on the inner layer side wall 102, ventilation windows 100b are arranged on the outer layer side wall 101 at intervals, and the ventilation windows 100b are communicated with the side wall cavities 100 a.

By applying the configuration mode, the hollow-out type double-line track beam body structure is provided and connected with the upper structure of the pipeline so as to provide an airtight vacuum pipeline environment, and the height size and the width size of the pipeline structure can be freely designed without influencing each other and the occupied area is small; 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 fretwork formula double-line track roof beam body structure, each lateral wall all designs for inside and outside two-layer cavity structure, and the interval sets up ventilation window on outer lateral wall, and this kind of mode makes the thickness of ectonexine lateral wall attenuate greatly, has alleviateed the structure dead weight, has promoted the economic nature of building the line, increases the thermal diffusivity of track roof beam body structure simultaneously again, reduces electric coil's temperature. In addition, during construction of the elevated road section, the split vacuum pipeline structure provided by the invention is a split pipeline, so that the hollow double-track beam structure at the lower part can form a working line of a bridge girder erection machine during construction, and after the hollow double-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.

As an embodiment of the present invention, since the electric coil 400 is mounted on the inner-layer sidewall 102 of each sidewall, the electric coil generates heat during operation. In addition, because the vacuum pipeline is subjected to atmospheric pressure all around, the side wall of every linear meter of length is subjected to side load of tens of tons. Based on this, the design of lateral wall need not only consider its intensity but also its heat dispersion, through designing the lateral wall into "fretwork" formula structure, be the lateral wall cavity 100a between the interior outer layer lateral wall, this kind of mode can increase the thickness of lateral wall by a wide margin under the prerequisite that does not increase the lateral wall material quantity to increase its ability of bearing side direction atmospheric pressure load. In addition, the inner and outer side walls are of a relatively thin thickness, and the outer side wall 101 is provided with a ventilation window 100b, the ventilation window 100b being in communication with the side wall cavity 100a, which effectively enhances the heat dissipation of the electrical coil mounted on the side wall.

Further, in the present invention, the first rail 10 and the second rail 20 are disposed at an interval, in order to ensure the air tightness of the vacuum pipeline, the hollow-out type double-track beam structure further includes a connecting cover plate 30, the connecting cover plate 30 is disposed continuously along the length direction of the hollow-out type double-track beam structure, the connecting cover plate 30 is used to connect the upper portion of the second side wall 12 and the upper portion of the third side wall 21, and the first rail 10, the connecting cover plate 30, the second rail 20 and the pipeline upper structure 200 together form an airtight vacuum pipeline cavity 1000 a.

In addition, in the present invention, in order to enhance the torsional rigidity of the two rails, the hollowed-out type double-track beam structure may be configured to further include a plurality of tie beams 40, the tie beams 40 are all located at the lower portion of the hollowed-out type double-track beam structure and are sequentially arranged at intervals along the length direction of the hollowed-out type double-track beam structure, and each tie beam 40 is located between the first track 10 and the second track 20 for enhancing the torsional rigidity of the first track 10 and the second track 20.

In the present invention, as shown in fig. 3, in order to improve the heat dissipation efficiency of the electric coil in the entire vacuum duct, each of the sidewalls may be configured to include a plurality of ventilation windows 100b, the plurality of ventilation windows 100b are disposed at intervals on the outer sidewall 101 along the length direction of each of the sidewalls, and each of the plurality of ventilation windows 100b communicates with the sidewall cavity 100 a.

As an embodiment of the present invention, heat generated by the electric coil mounted on the inner sidewall 102 of the first sidewall 11 and the fourth sidewall 22 during operation is transferred to the inner sidewall 102, a sidewall cavity 100a is disposed between the inner sidewall 102 and the outer sidewall 101, the sidewall cavity 100a is communicated with the ventilation window 100b, the ventilation window 100b is communicated with the outside atmosphere, and the outside cold air exchanges heat with the inner sidewall 102, so that the heat dissipation efficiency of the vacuum duct can be improved, and the temperature of the electric coil can be reduced. The heat generated by the electric coil mounted on the inner side wall 102 of the second side wall 12 and the third side wall 21 in the working process is conducted to the inner side wall 102, a side wall cavity 100a is arranged between the inner side wall 102 and the outer side wall 101, the side wall cavity 100a is communicated with the ventilation window 100b, the ventilation window 100b is communicated with the cavity between the connecting cover plate 30 and the rail bottom connecting beam 40, and the rail bottom connecting beams 40 are arranged at intervals, so that the ventilation window 100b can be communicated with the outside cold air through the cavity between the connecting cover plate 30 and the rail bottom connecting beam 40, and the outside cold air exchanges heat with the inner side wall 102, thereby improving the heat dissipation efficiency of the vacuum pipeline and reducing the temperature of the electric coil.

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 to the train, the first track 10 may be configured to further include a first track bottom structure 13, the first track bottom structure 13 being disposed between the first side wall 11 and the second side wall 12; the second rail 20 further comprises a second rail bottom structure 23, the second rail bottom structure 23 being arranged between the third side wall 21 and the fourth side wall 22; each rail bottom structure has a rail bottom cavity 100c and a vent hole 100d, the rail bottom cavity 100c is continuously arranged along the length direction of each rail bottom structure, and the vent hole 100d is respectively communicated with the rail bottom cavity 100c and the airtight vacuum pipeline cavity.

By applying the configuration mode, the rail bottom cavity 100c and the vent hole 100d are arranged in the first rail bottom structure 13 and the second rail bottom structure 23, and the rail bottom cavity 100c is communicated with the air-tight vacuum pipeline cavity 1000a through the vent hole 100d, 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 a high speed is reduced, and the pneumatic resistance borne by the train is reduced.

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 duct and reduce the aerodynamic resistance applied to the train, the first track bottom structure 13 and the second track bottom structure 23 may be configured to have a plurality of ventilation holes 100d, and the plurality of ventilation holes 100d may be sequentially arranged at intervals along the length direction of the first track bottom structure 13 or the second track bottom structure 23.

In addition, in the present invention, since the rail bottom is used as a walking channel for the maintainers and the passengers to escape, for safety, the hollow-out type double-track beam structure may be configured to further include a first protective cover 50 and a second protective cover 60, the first protective cover 50 is disposed on the vent hole 100d of the first track bottom structure 13, and a first vent gap 50a is formed between the first protective cover 50 and the first track bottom structure 13; the second protective cover 60 is disposed over the vent hole 100d of the second track substructure 23 with a second vent gap 60a between the second protective cover 60 and the second track substructure 23.

As an embodiment of the present invention, as shown in fig. 7 and 8, in order to simplify the vacuum duct structure and to improve 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 50 and the second protective cover 60, in such a manner that air in the vacuum duct and air in the rail bottom cavity 100c may freely flow through the vent holes 100d and the vent gap between either cover and the corresponding rail bottom structure.

Further, in the present invention, in order to enhance the heat dissipation of the electric coil, the hollowed-out type double-track beam structure may be configured to further include a heat conducting element 70, and the heat conducting element 70 is disposed between the electric coil and the inner-layer sidewall 102. As an embodiment of the present invention, heat conductive silicone or heat conductive grease may be used as the heat conductive member 70, and the heat conductive member 70 is disposed between the electric coil and the mounting layer of the inner sidewall 102 so that heat generated from the coil can be quickly transmitted to the reinforced concrete sidewall.

In the invention, in order to be suitable for industrial application and improve the service life of the vacuum pipeline, the material of the upper structure of the pipeline can be configured to comprise steel, and the material of the hollowed-out double-line track beam body structure comprises concrete. Further, in the present invention, the pipe upper structure 200 and the hollowed-out type two-line track girder structure 100 may be connected using the connection bolt 600. Specifically, as shown in fig. 1 to 3, pipeline superstructure 200 adopts a plurality of connecting bolt 600 to be connected with fretwork formula double-line track roof beam body structure 100, before the assembly, connecting bolt 600 is pre-buried in fretwork formula double-line track roof beam body structure 100, according to the interval size between the actual demand test connecting bolt 600, and drill in pipeline superstructure 200 according to the interval size between connecting bolt 600, control the clearance of connecting bolt 600 and bolt hole, the joint strength of reinforcing vacuum pipe upper and lower part, thereby can improve vacuum pipe's bearing wholeness.

In addition, in the present invention, in order to enhance the heat dissipation performance of the reinforced concrete, an aggregate having a good thermal conductivity, for example, an iron ore aggregate, may be added to the inner-layer side wall 102 made of the reinforced concrete to improve the heat dissipation performance of the reinforced concrete.

According to another aspect of the present invention, a split type vacuum pipeline is provided, which includes a pipeline upper structure 200 and a hollowed-out two-line track beam body structure 100, the pipeline upper structure 200 and the hollowed-out two-line track beam body structure 100 are connected to form a pipeline body, and the hollowed-out two-line track beam body structure 100 is the hollowed-out two-line track beam body structure 100 as above. Because the hollowed-out double-track beam structure 100 saves the using amount of reinforced concrete, has high strength, good heat conductivity, small occupied area and easy construction, the double-track beam structure 100 can be 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 split vacuum pipe structure may be configured to further include a reinforcing rib plate 300, the reinforcing rib plate 300 is welded to the outside of the pipe body, and the reinforcing rib plate 300 is used to improve the strength of the pipe body and increase the heat dissipation area of the split vacuum pipe structure. As an embodiment of the present invention, a steel plate may be used as the reinforcing plate 300, 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 vacuum pipe structure and increase the heat dissipation area of the split vacuum pipe structure, the split vacuum pipe structure may be configured to include a plurality of reinforcing ribs 300, and the plurality of reinforcing ribs 300 may be provided on the pipe body at intervals along the length direction of the pipe body. As an embodiment of the present invention, a steel plate may be used as the reinforcing rib 300, and as shown in fig. 3, the split vacuum pipe structure includes a plurality of steel plates welded to the pipe body 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 split vacuum pipeline structure and prevent the air leakage of the vacuum pipeline structure during the working process, the split vacuum pipeline structure may be configured to further include a sealing member 700, the sealing member 700 is disposed at a connection position of the pipeline upper structure and the hollowed-out double-track beam structure, and the sealing member 700 is used to realize the sealing connection between the pipeline upper structure and the hollowed-out double-track beam structure.

By applying the configuration mode, the sealing element is arranged at the connecting position of the first structure and the second 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 which the upper structure 200 of the pipeline is tightly pressed against the lower double-track beam structure 100 of reinforced concrete material by the sealing rubber strip structure under the action of thousands of tons of air pressure after vacuum is pumped in the vacuum pipeline, 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.

Further, in the present invention, in order to further improve the sealing performance of the vacuum pipe, the split vacuum pipe structure may be configured to further include an airtight coating 500, the airtight coating 500 being coated outside the two-wire rail girder body structure 100; the material of the two-wire track beam structure 100 further includes an air-tight agent. As an embodiment of the present invention, the material of the airtight coating 500 includes asphalt, iron sheet or thin steel sheet, and the material of the two-track beam structure 100 is mainly composed of concrete, in which a certain amount of airtight agent is added to enhance the airtightness. As other embodiments of the present invention, other materials having an airtight function may be used as the airtight coating 500.

In order to further understand the present invention, the hollow double-track beam structure and the split vacuum pipeline of the present invention will be described in detail with reference to fig. 1 to 8.

As shown in fig. 1 to 8, according to an embodiment of the present invention, a split type vacuum pipe is provided, which is generally divided into an upper part and a lower part, as shown in fig. 1 and 2, a pipe upper structure 200 and a hollowed-out double-track beam structure 100, wherein the two parts are sealed by using a sealing strip and connected by using a connecting bolt 600.

The upper and lower parts together form a vacuum pipeline, and a first track 10 and a second track 20 are designed in the vacuum pipeline for the bidirectional magnetic suspension train to pass through. Each track is composed of three major parts, namely a left side wall, a right side wall and a track bottom structure, an electric coil 400 is installed on each side wall, and the electric coils 400 can generate heat when in work. In addition, because the vacuum pipeline is subjected to atmospheric pressure all around, the side wall of every linear meter of length is subjected to side load of tens of tons. Based on this, its intensity and its heat dispersion need be considered in the design of lateral wall, through designing the lateral wall into "fretwork" formula structure, be the lateral wall cavity 100a between the inside and outside lateral wall layer, this kind of mode can be under the prerequisite that does not increase the lateral wall material quantity, increase the thickness of lateral wall by a wide margin to increase its ability of bearing side direction atmospheric pressure load, and the thickness of inside and outside lateral wall is thinner, be provided with a plurality of ventilation windows 100b on the outer lateral wall interval simultaneously, can effectively strengthen the heat dispersion of the electrical coil of lateral wall installation.

In addition, in order to enhance the heat dissipation of the electric coil 400, a heat conductive silicone or a heat conductive silicone grease may be disposed between the electric coil 400 and the mounting surface of any one of the sidewalls, so that the heat generated by the electric coil 400 can be quickly transferred to the reinforced concrete sidewall. Furthermore, aggregates with better heat conductivity, such as iron ore aggregates, can be added into the inner-layer side wall 102 to enhance the heat dissipation performance of the reinforced concrete.

And meanwhile, the double-track beam body structure of the lower reinforced concrete needs to be designed in an enhanced mode under the action of atmospheric pressure, and the first track bottom structure 13 and the second track bottom structure 23 are designed into box-shaped beam structures in order to reduce the consumption of concrete and improve the economic performance of building lines. The vent hole 100d is designed at the upper part of the rail bottom cavity 100c of the box girder, so that the rail bottom cavity 100c and the airtight vacuum pipeline cavity 1000a of the vacuum pipeline are communicated with each other, and the design is equivalent to increase the sectional area of the 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 hole 100d for safety, and the vortex sensing plate used for emergency braking of a train can be used as the cover plate, so that air in the pipeline and air in the rail bottom cavity 100c can freely flow through the vent hole 100d and a vent gap between the vortex sensing plate and the rail bottom structure.

The second sidewall 12 of the first rail 10 is associated with the upper portion of the third sidewall 21 of the second rail 20 using a connection cover 30 made of reinforced concrete, so that the two rails can be formed as a single body to secure the airtight performance of the vacuum pipe. In addition, in order to enhance the torsional rigidity of the two rails, a plurality of rail bottom connecting beams 40 are arranged between the rail bottom structures of the two rails at intervals.

The concrete used by the hollowed-out double-track beam body structure of the embodiment has increased sealing requirements, so a certain amount of air-tight agent can be added into the concrete, and a layer of air-tight coating 500 is laid and sprayed on the outer side of the reinforced concrete structure, wherein the air-tight coating 500 is made of materials with air-tight effect, such as asphalt, iron sheet, thin steel plate and the like.

The main effect of the upper structure of the pipeline is to provide airtight sealing for the vacuum pipeline, a thin steel plate is adopted to form an arch structure, and then a plurality of reinforcing rib plates are longitudinally welded along the pipeline, so that the steel consumption is saved, the rigidity and the strength of the structure are increased, and in addition, the reinforcing rib plate structures also increase the heat dissipation area of the pipeline and play a role of a heat dissipation grid.

Adopt a plurality of connecting bolt 600 to connect between pipeline superstructure and the fretwork formula double-line track roof beam body structure of lower part, connecting bolt 600 is pre-buried in the fretwork formula double-line track roof beam body structure of lower part, according to actual test connecting bolt 600's interval size, drills in pipeline superstructure, and the clearance of control connecting bolt 600 and bolt hole strengthens the rigidity of connection of upper and lower part, has improved the integrative nature of the bearing of pipeline.

The sealing strip is made of low-rigidity and sealing materials such as rubber, after the interior of the pipeline is vacuumized, the steel structure at the upper part is tightly pressed on the double-line track beam structure at the lower part through the sealing strip structure under the action of thousands of tons of air pressure, and a very good sealing effect can be achieved.

In conclusion, the hollow-out type double-track beam body structure and the split type vacuum pipeline with the hollow-out type double-track beam body structure are provided, the vacuum pipeline can reduce the line building cost from multiple aspects, improve the line building economy, effectively reduce the energy consumption of high-speed running of a train, improve the heat dissipation performance, prolong the service life of an electric coil and improve the operation economy. Compared with the prior art, the hollow-out type double-line track beam body structure and the split type vacuum pipeline provided by the invention have the following advantages.

Firstly, the vacuum pipeline is formed by connecting an upper steel structure and a lower reinforced concrete structure, the lower reinforced concrete structure adopts a structural design, the side wall is designed into an inner layer and an outer layer of cavity structures, the thicknesses of the inner layer reinforced concrete and the outer layer reinforced concrete are greatly reduced, and the air window is formed in the outer layer side wall.

Secondly, the split type vacuum pipeline structure is very convenient to construct in the elevated road section, the lower concrete structures are sequentially hoisted to the bridge piers by using the bridge girder erection machine, the lower concrete structures form working lines of the bridge girder erection machine, the upper concrete structures are installed in place one by using the bridge girder erection machine after the lower concrete structures are installed, the engineering construction is very convenient, and the construction convenience is equivalent to the improvement of the economy of a building line.

Thirdly, the two tracks are arranged in the same vacuum pipeline, the cross section area of the vacuum pipeline is greatly increased, and the rail bottom cavities of the two tracks are respectively connected with the vacuum pipeline through a plurality of vent holes, so that the air circulation area is further increased, the blocking ratio is reduced, and the pneumatic resistance and pneumatic heat of the maglev train during high-speed operation are greatly weakened or even eliminated.

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 … …," "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 (8)

1. The utility model provides a fretwork formula double-line track roof beam body structure which characterized in that, fretwork formula double-line track roof beam body structure is connected in order to form the pipeline body with pipeline superstructure, the pipeline body has gas tightness vacuum pipe cavity, fretwork formula double-line track roof beam body structure includes:

a first rail (10), the first rail (10) comprising a first sidewall (11) and a second sidewall (12);

a second rail (20), wherein the second rail (20) comprises a third side wall (21) and a 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 the bidirectional passing of trains;

each side wall comprises an outer side wall (101) and an inner side wall (102), a side wall cavity (100a) is formed between the outer side wall (101) and the inner side wall (102) along the length direction of each side wall, an electric coil is arranged on the inner side wall (102), ventilation windows (100b) are arranged on the outer side wall (101) at intervals, and the ventilation windows (100b) are communicated with the side wall cavities (100 a);

the hollowed-out double-track beam body structure further comprises a heat conducting element (70), wherein the heat conducting element (70) is arranged between the electric coil and the inner layer side wall (102); the upper structure of the pipeline is made of steel, and the hollowed-out double-track beam body structure is made of concrete; the hollowed-out double-track beam body structure further comprises a first protective cover plate (50) and a second protective cover plate (60), wherein the first protective cover plate (50) is arranged on the vent hole (100d) of the first track bottom structure (13), and a first vent gap (50a) is formed between the first protective cover plate (50) and the first track bottom structure (13); the second protective cover (60) is arranged on the vent hole (100d) of the second rail substructure (23), and a second vent gap (60a) is formed between the second protective cover (60) and the second rail substructure (23).

2. The hollowed-out double-track beam structure according to claim 1, wherein the first track (10) and the second track (20) are arranged at intervals, the hollowed-out double-track beam structure further comprises a connecting cover plate (30), the connecting cover plate (30) is continuously arranged along the length direction of the hollowed-out double-track beam structure, 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.

3. The hollowed double-track beam structure according to claim 2, further comprising a plurality of rail bottom connecting beams (40), wherein the rail bottom connecting beams (40) are all located at the lower part of the hollowed double-track beam structure and are sequentially arranged at intervals along the length direction of the hollowed double-track beam structure, and each rail bottom connecting beam (40) is located between the first track (10) and the second track (20) to enhance the torsional rigidity of the first track and the second track.

4. The hollowed-out type double-line track beam body structure according to claim 3, wherein each side wall comprises a plurality of ventilation windows (100b), the ventilation windows (100b) are arranged on the outer side wall (101) at intervals along the length direction of each side wall, and the ventilation windows (100b) are all communicated with the side wall cavity (100 a).

5. The openwork double-track beam structure according to any one of claims 1 to 4, wherein the first track (10) further comprises a first track bottom structure (13), the first track bottom structure (13) being disposed between the first side wall (11) and the second side wall (12); the second rail (20) further comprises a second rail bottom structure (23), the second rail bottom structure (23) being arranged between the third side wall (21) and the fourth side wall (22); each of the rail bottom structures is provided with a rail bottom cavity (100c) and a vent hole (100d), the rail bottom cavity (100c) is continuously arranged along the length direction of each of the rail bottom structures, and the vent hole (100d) is respectively communicated with the rail bottom cavity (100c) and the air-tight vacuum pipeline cavity.

6. The hollowed-out type double-line track beam body structure according to claim 5, wherein the first track bottom structure (13) and the second track bottom structure (23) are respectively provided with a plurality of vent holes (100d), and the vent holes (100d) are sequentially arranged at intervals along the length direction of each track bottom structure so as to enable the track bottom cavity (100c) to be in air flow communication with the airtight vacuum pipeline cavity.

7. The hollowed-out two-wire track beam structure according to claim 1, wherein the first protective cover plate (50) and the second protective cover plate (60) are eddy current induction plates.

8. A split type vacuum pipe, characterized in that, split type vacuum pipe includes pipeline superstructure (200) and fretwork formula double-line track roof beam body structure (100), pipeline superstructure (200) with fretwork formula double-line track roof beam body structure (100) are connected in order to form the pipeline body, fretwork formula double-line track roof beam body structure (100) be any one of claim 1 to 7 fretwork formula double-line track roof beam body structure (100).

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