CN112923583A

CN112923583A - Aerodynamic circulating heating device and roadbed thereof

Info

Publication number: CN112923583A
Application number: CN202110321516.6A
Authority: CN
Inventors: 俞祁浩; 陈坤; 金明阳
Original assignee: Northwest Institute of Eco Environment and Resources of CAS
Current assignee: Northwest Institute of Eco Environment and Resources of CAS
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2021-06-08
Anticipated expiration: 2041-03-25
Also published as: CN112923583B

Abstract

The invention provides an aerodynamic circulating heating device and a roadbed thereof, and relates to the technical field of engineering construction of seasonal frozen soil areas. In the design of the air power circulation heating device, one end of a solar heat absorption pipe is inserted into a heat collection box; the convection heat exchange tube is arranged inside the heat collection box and the solar heat absorption tube, a first flow channel is formed inside the convection heat exchange tube, a second flow channel is formed by the outer wall of the convection heat exchange tube and the outer walls of the heat collection box and the solar heat absorption tube, and the first flow channel is communicated with the second flow channel and filled with air; the convection power element is arranged in the first flow channel and used for pushing air to flow in the first flow channel and the second flow channel; the heat absorption section of the heat collection pipe is inserted into the heat collection box, and the heat release section of the heat collection pipe is inserted into the roadbed. The device can utilize solar energy resource, through level heating in road bed ground temperature field, the easy frost heaving position of road bed key regulation and control, effectively avoids the production of engineering diseases such as frost heaving, inhomogeneous undulation of road bed in the frozen soil region in season.

Description

Aerodynamic circulating heating device and roadbed thereof

Technical Field

The invention relates to the technical field of engineering construction of seasonal frozen soil areas, in particular to an aerodynamic circulating heating device and a roadbed thereof.

Background

The Qinghai-Tibet railway is located in northeast of Qinghai-Tibet plateau at West section of Qinghai-Tibet railway, railway lines pass through coastal plain, alluvial plain and ice plain terrace of North of Qinghai lake, the average altitude is 3220m, the average annual precipitation amount is 376mm, the precipitation distribution is uneven, most of the precipitation is concentrated in 7-9 months, the average annual temperature is-0.6 ℃, and the average temperature in the coldest month is-20.6 ℃. The Qinghai-Tibet railway West section has cold climate, strong freezing capacity of air temperature and large freezing depth which can reach 1.8m at the maximum, belongs to a typical seasonal frozen soil area, and has relatively serious engineering diseases such as subgrade frost heaving, thaw collapse and the like caused by freezing and thawing.

In recent years, due to the continuous increase of rainfall capacity of the Qinghai-Tibet plateau, the enrichment of underground water and the increase of underground water level are caused, and the further increase of freeze-thaw engineering diseases in the region is caused by the aggravation of climate environment change, so that the long-term stability of the roadbed is greatly influenced. Although the research is carried out on the roadbed diseases under the engineering action of the seasonal frozen soil area, the research is mainly carried out on the problems of the micro frozen swelling engineering action and influence of the roadbed and the like under the working condition of highway engineering or high-speed railways in northeast, northwest and other areas. But the research on the development characteristics and the distribution rule of the diseases of the freeze-thaw engineering under the special conditions of high water level, coarse filler, strong freeze-thaw and the like of the west grid section of the Qinghai-Tibet railway is lacked. The methods of coarse particle replacement, chemical grouting, waterproof curtain and the like used in the conventional areas are limited by engineering conditions that trains normally run and construction cannot be interrupted in the application of the areas, and are very difficult to crack a disposal part and integrally seal the lower part of a roadbed due to the strong freezing and thawing action of soil bodies, so that the methods are difficult to meet the actual engineering requirements. Because the previous research on the engineering measures for treating the engineering diseases is weak, the stability and the operation safety of the roadbed are influenced for a long time by engineering problems.

Disclosure of Invention

The invention aims to provide an aerodynamic circulating heating device and a roadbed thereof, which can realize balanced and flat heating of the roadbed by utilizing solar energy resources through flat heating of a roadbed ground temperature field and key regulation and control of parts of the roadbed which are easy to frost heaving, and effectively avoid engineering diseases such as frost heaving, uneven fluctuation and the like of the roadbed in a seasonal frozen soil area.

Embodiments of the invention may be implemented as follows:

in a first aspect, the present invention provides an aerodynamic cycle heating apparatus comprising:

the heat collection box is used for being installed outside the roadbed;

one end of the solar heat absorption pipe is inserted into the heat collection box and is communicated with the heat collection box;

the convection heat exchange tube is arranged inside the heat collection box and the solar heat absorption tube, a first flow channel is formed inside the convection heat exchange tube, a second flow channel is formed by the outer wall of the convection heat exchange tube and the outer walls of the heat collection box and the solar heat absorption tube, and the first flow channel is communicated with the second flow channel and is filled with air;

the convection power element is arranged in the first flow channel and used for pushing air to flow in the first flow channel and the second flow channel;

the heat collecting pipe comprises a heat absorbing section and a heat releasing section which are communicated with each other, the heat absorbing section is inserted into the heat collecting box, the heat releasing section is inserted into the roadbed, the heat absorbing section is used for absorbing heat of the heat collecting box and transferring the heat to the heat releasing section, and the heat releasing section is used for heating the roadbed.

Therefore, the solar heat absorption tube absorbs solar energy and transfers heat to the heat collection box, wherein the heat collection box, the convection heat exchange tube in the solar heat absorption tube and the convection power element in the convection heat exchange tube can accelerate the convection heat exchange between the solar heat absorption tube and the heat collection box, and the heating efficiency of the heat collection box is improved. The heat absorption section of the heat collection pipe absorbs the heat of the heat collection box and transfers the heat to the heat release section, and the heat release section heats the roadbed, so that the roadbed is always in a net heat absorption state, the internal heat is continuously accumulated, the heat accumulation inside the roadbed and the temperature of the roadbed are always kept in a normal temperature state, and the purposes of preventing and treating roadbed freezing, roadbed frost heaving and engineering diseases are achieved.

In an alternative embodiment, the convective heat exchange tube comprises:

the main pipe is arranged in the heat collecting tank and extends along the length direction of the heat collecting tank;

one end of the branch pipeline is communicated with the main pipeline, and the other end of the branch pipeline extends into the solar heat absorption pipe and is communicated with the solar heat absorption pipe.

Therefore, the convection heat exchange tubes can extend into each solar heat absorption tube, the heat collection box is communicated with each solar heat absorption tube, and the efficiency of convection heat exchange between the heat collection box and each solar heat absorption tube is improved.

In an alternative embodiment, the convection current power element is a fan, and the fan is installed in the main pipe.

Therefore, the efficiency of the fan for blowing the air to flow is highest, and the flow rate of the air can be improved.

In an alternative embodiment, a plurality of solar heat absorption pipes are connected to two opposite sides of the heat collection box, and the plurality of solar heat absorption pipes positioned on the same side are uniformly arranged at intervals.

Therefore, the solar heat absorption pipes are arranged in a large number, the heating efficiency of the heat collection box is high, the whole arrangement is regular, and the stability of the device is good.

In an alternative embodiment, the heat absorption section is inserted in an upper middle portion of the heat collection tank and the solar heat absorption tube is inserted in a lower middle portion of the heat collection tank.

Therefore, by utilizing the principle that the density of hot air is less than that of cold air, the hot air in the solar heat absorption pipe can automatically rise to the heat absorption section to heat the heat absorption section, the cold air above the heat collection box automatically descends, is heated into hot air by the solar heat absorption pipe and rises again, and the circulation is performed, so that the heating efficiency of the heat absorption section is improved.

In an alternative embodiment, the air power cycle heating apparatus further comprises:

and the solar power supply is electrically connected with the convection power element and is used for generating power by utilizing solar energy and supplying power to the convection power element.

Therefore, the convection power element can be directly powered by solar energy without being connected with other power supplies, so that the convection power element can independently operate.

and the time controller is electrically connected between the solar power supply and the convection power element and is used for controlling the working time of the convection power element.

Like this, can be through the operating time of time controller control convection current power component, when solar energy absorber pipe heat absorption efficiency is higher, can be through the operation of time controller control convection current power component to realize gathering the high-efficient heat transfer of heat pipe, in the overcast and rainy weather of night or winter, can be through the time controller control convection current power component operation of pausing, the life of extension device.

In a second aspect, the present invention provides an aerodynamic circulation heating roadbed, the aerodynamic circulation heating roadbed comprises the roadbed and the aerodynamic circulation heating device of any one of the preceding embodiments, wherein a heat collection box and a solar heat absorption pipe are installed outside the roadbed, and a heat release section of the heat collection pipe is inserted into the interior of the roadbed.

Therefore, the heat accumulation and the temperature inside the roadbed are always kept in a positive temperature state, and the aims of preventing roadbed freezing, roadbed frost heaving and engineering diseases are fulfilled.

In an optional embodiment, the aerodynamic cycle heating roadbed further comprises an insulation material layer, and the insulation material layer is arranged on the slope surface of the roadbed.

Like this, the insulating material layer can prevent the inside heat of road bed and scatter and disappear, effectively guarantees the inside thermal retention of road bed at day and night change in-process.

In an alternative embodiment, the two opposite sides of the roadbed are provided with the aerodynamic circulating heating devices, and one side of the roadbed is provided with a plurality of aerodynamic circulating heating devices at intervals.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of an aerodynamic cycle heating roadbed provided by an embodiment of the invention;

FIG. 2 is a schematic structural view of the aerodynamic force circulation heating apparatus of FIG. 1;

FIG. 3 is a cross-sectional schematic view of the structure of FIG. 2;

FIG. 4 is a schematic right-side view of the structure of FIG. 3;

FIG. 5 is a schematic perspective view of a heat collection tank and a solar absorber tube;

FIG. 6 is a schematic view of the control principle for the flow power element;

fig. 7 is a schematic view of a simulated calculation result geothermal field 30 days after the heat collecting pipes are arranged on the roadbed.

Icon: 1-heating the roadbed by aerodynamic circulation; 2-roadbed; 3-a heat insulating material layer; 4-anchor rod; 5-an aerodynamic circulating heating device; 6-heat collecting tank; 7-solar heat absorption tubes; 8-convection heat exchange tubes; 81-main pipeline; 82-branch pipes; 9-convection power element; 10-a solar power supply; 11-a time controller; 12-a heat-collecting pipe; 13-a heat absorption section; 14-exothermic section.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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 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, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

The embodiment of the invention is provided aiming at the key scientific and technological problems in subgrade frost heaving, and the aims of controlling temperature and preventing and controlling subgrade frost heaving are achieved by the device provided by the embodiment of the invention starting from the subgrade temperature in three indispensable essential elements of water, soil and temperature generated by subgrade frost heaving.

Referring to fig. 1, the present embodiment provides an aerodynamic circulation heating roadbed 1, and the aerodynamic circulation heating roadbed 1 includes a roadbed 2, an insulation material layer 3 and an aerodynamic circulation heating device 5.

The heat insulation material layer 3 is arranged on the slope surface of the roadbed 2, can cover the whole slope surface of the roadbed 2 and is fixed through the anchor rods 4. In other embodiments, it is also possible to compact and fix the insulating-material layer 3 by covering the outer surface of the insulating-material layer 3 with a thin layer of soil or other material. The heat-insulating material layer 3 can be made of building rock wool heat-insulating materials or an integrated heat-insulating plate. Specifically, the sunny slope surface and the cloudy slope surface of the roadbed 2 can be provided with the heat insulation material layer 3, so that the heat inside the roadbed 2 can be prevented from dissipating, and the retention of the heat inside the roadbed 2 can be effectively guaranteed in the day and night change process.

Specifically, referring to fig. 1 to 5, arrows in fig. 4 and 5 indicate the direction of air flow. The aerodynamic circulation heating device 5 includes a heat collecting tank 6, a solar heat absorbing pipe 7, a convection heat exchanging pipe 8, a convection power element 9, and a heat collecting pipe 12. The heat collecting box 6 may be disposed on the sunny slope side of the roadbed 2 and near the natural ground surface area of the toe, or may be disposed on the cloudy slope side of the roadbed 2 and in the natural ground surface area which can be irradiated by the sun in winter.

The surface of the solar heat absorption tube 7 is provided with a solar energy absorption coating which is a solar energy high-efficiency heat absorption material and can be an electroplating coating or an electrochemical surface conversion coating. One end of the solar heat absorbing pipe 7 is inserted into the heat collecting tank 6, and is communicated with the heat collecting tank 6, and forms a closed space. In this embodiment, the plurality of solar heat absorbing pipes 7 are connected to two opposite sides of the heat collecting box 6, and the plurality of solar heat absorbing pipes 7 located on the same side are uniformly arranged at intervals. Thus, the solar heat absorption pipes 7 are arranged in a large number, the heating efficiency of the heat collection box 6 is high, the whole arrangement is regular, and the stability of the device is good.

The convection heat exchange tube 8 is arranged inside the heat collection box 6 and the solar heat absorption tube 7, a first flow channel is formed inside the convection heat exchange tube 8, a second flow channel is formed by the outer wall of the convection heat exchange tube 8 and the outer walls of the heat collection box 6 and the solar heat absorption tube 7, and the first flow channel is communicated with the second flow channel and filled with air. The heat collection box 6 and the solar heat absorption pipe 7 transfer heat by utilizing air, so that the heat transfer efficiency is high, the requirement on the air tightness of the heat collection box 6 and the solar heat absorption pipe 7 is not high, the design difficulty and the production cost are reduced, the performance of the device cannot be obviously reduced even if leakage occurs, and the stability of the device is improved.

Specifically, the convective heat exchange tube 8 includes a main tube 81 and a branch tube 82, the main tube 81 is disposed inside the heat collecting tank 6 and extends in a length direction of the heat collecting tank 6. One end of the branch pipeline 82 is communicated with the main pipeline 81, and the other end of the branch pipeline 82 extends into the solar heat absorption pipe 7 and is communicated with the solar heat absorption pipe 7. Thus, the convection heat exchange tube 8 can extend into each solar heat absorption tube 7, and the heat collection box 6 is communicated with each solar heat absorption tube 7, so that the efficiency of the convection heat exchange between the heat collection box 6 and each solar heat absorption tube 7 is improved.

The convection power element 9 is a fan which is installed in the main pipe 81. Therefore, the efficiency of the fan for blowing the air to flow is highest, and the flow rate of the air can be improved.

The heat collecting pipe 12 is of the type of a profiled heat pipe. The heat collecting pipe 12 includes a heat absorbing section 13 and a heat releasing section 14 which are communicated with each other, the heat absorbing section 13 is inserted into the heat collecting tank 6, so that the heat collecting tank 6 fully wraps the heating section, and the heat collecting tank 6 and the heat absorbing section 13 constitute a closed container. Preferably, the heat absorbing section 13 is inserted at an upper middle portion of the heat collecting tank 6, and the solar heat absorbing pipe 7 is inserted at a lower middle portion of the heat collecting tank 6. In this way, by using the principle that the density of the hot air is less than that of the cold air, the hot air in the solar heat absorbing pipe 7 can automatically rise to the heat absorbing section 13 to heat the heat absorbing section 13, the cold air above the heat collecting box 6 automatically descends, and is heated by the solar heat absorbing pipe 7 into hot air, and then rises again, and the cycle is repeated, so that the heating efficiency of the heat absorbing section 13 is improved.

The heat radiating section 14 is inserted into the roadbed 2 from a range between the half slope and the toe of the roadbed 2, and the insertion direction is perpendicular to the longitudinal direction of the roadbed 2. The length of the heat collecting pipe 12 can be determined according to actual conditions in the field. The heat absorbing section 13 is for absorbing heat of the heat collecting tank 6 and transferring the heat to the heat releasing section 14, and the heat releasing section 14 is for heating the roadbed 2. Wherein, the included angle scope between the length direction of gathering hot pipe 12 and the horizontal plane is: 30 to 30 degrees, in this embodiment, the heat releasing section 14 of the heat collecting pipe 12 is preferably tilted upward by 5 to 10 degrees with respect to the heat absorbing section 13, that is, as shown in fig. 1, the heat releasing section 14 extends along the x direction, and the upward elevation angle along the y direction is: and 5-10 degrees, the height position of the heat release section 14 is basically positioned at the height position of the center of the roadbed 2 and extends to the whole or most area of the width of the roadbed 2 in length. Like this, it is convenient to install heat collecting pipe 12 in road bed 2, and drilling depth is little and quantity is few, can not change the original engineering structure of road bed 2, has guaranteed the stability of original road bed 2, and the work progress does not constitute the influence to the normal driving of train, effectively solves the difficult problem of engineering construction under satisfying the train condition of driving. Moreover, due to the arrangement of the liquid absorption cores and the height difference of the heat absorption section 13 relative to the heat release section 14, the heat collection pipe 12 can easily realize the effect of a horizontal heat pipe under the action of gravity and capillary force, and can realize the efficient heat transfer in the horizontal direction, thereby realizing the unpowered efficient heat transfer of the whole device.

Referring to fig. 6, the air power circulation heating device 5 further includes a solar power supply 10 and a time controller 11, wherein the convection power element 9, the time controller 11 and the solar power supply 10 are electrically connected in sequence. The solar power supply 10 is used for generating electricity by using solar energy and supplying power to the convection power element 9. Therefore, the convection power element 9 can be directly powered by solar energy without being connected with other power supplies, so that the convection power element can independently operate. The time controller 11 is used to control the operation time of the convection current power element 9. Therefore, the working time of the convection power element 9 can be controlled by the time controller 11, when the heat absorption efficiency of the solar heat absorption pipe 7 is high, the convection power element 9 can be controlled by the time controller 11 to operate, so that the heat collection pipe 12 can efficiently transfer heat, and in rainy days at night or in winter, the convection power element 9 can be controlled by the time controller 11 to pause, so that the service life of the device is prolonged.

Specifically, the time controller 11 can control the convection current power element 9 to be in an operating time period from 10 am to 6 pm during the winter months from 11 to 3 rd of the next year, and all other times are in an off state. Secondly, for the heating process of the heat collecting pipe 12 to the roadbed 2, the heat collecting pipe 12 only starts to work under the working condition that the temperature of the heat absorbing section 13 is higher than that of the heat releasing section 14 due to the characteristics of the heat collecting pipe 12, and the high-efficiency heat transfer process is carried out. For the environmental conditions of rainy and snowy weather within working time in winter, the heat collecting pipe 12 is still in the working state of stopping working under the working condition that the temperature of the heat absorbing section 13 of the heat collecting pipe 12 is lower than that of the heat releasing section 14, so that the internal temperature of the roadbed 2 is prevented from being dissipated, and the overall efficiency of high-efficiency heat collection is achieved.

The air power circulation heating device and the roadbed thereof provided by the embodiment have the working principle that:

the solar heat absorption tube absorbs solar energy and transmits heat to the heat collection box, wherein the heat collection box, the convection heat exchange tube in the solar heat absorption tube and the convection power element in the convection heat exchange tube can accelerate the convection heat exchange between the solar heat absorption tube and the heat collection box, and the heating efficiency of the heat collection box is improved. The heat absorption section of the heat collection pipe absorbs the heat of the heat collection box and transfers the heat to the heat release section, and the heat release section heats the roadbed, so that the roadbed is always in a net heat absorption state, the internal heat is continuously accumulated, the heat accumulation inside the roadbed and the temperature of the roadbed are always kept in a normal temperature state, and the purposes of preventing and treating roadbed freezing, roadbed frost heaving and engineering diseases are achieved.

The beneficial effects of the air power circulation heating device and the roadbed thereof that this embodiment provided include:

1. the structure is reasonable in design, the solar energy is efficiently utilized to transfer heat to the roadbed, and engineering problems such as frost heaving damage of the roadbed and the like are effectively prevented and controlled;

2. the heat transfer efficiency is high, and the conversion from natural convection to forced convection of air in the pipe is realized by arranging the convection power element in the convection heat exchange pipe, so that the air circulation speed in the pipe is effectively increased, and the heat transfer efficiency is improved;

3. the device has the advantages of high reliability, high safety and high environmental protection, the traditional liquid working medium is abandoned, air is used as the working medium, and the device is low in cost, high in reliability and high in safety because the air is not easy to leak and does not have a corrosion effect on the interface connecting part.

In order to verify the regulation and control efficiency of the aerodynamic force circulation heating device and the roadbed thereof, numerical simulation calculation under the action of engineering measures is carried out by combining geological conditions of engineering fields from Xining to Guermu test of Tibet railway.

Example (c): on the slope surface at the side of the cloudy slope of the Qinghai-Tibet railway roadbed with the height of 2.0m and the top surface width of 7.5m, a heat release section of a heat collecting pipe is horizontally inserted into the roadbed at the height position of 0.5m, the length of the heat release section is 8m, and the distance between the heat collecting pipes along the length direction of the roadbed is 2 m. In the heating system setup, the heating power is referred to the existing 1m²The heating power of the heat collecting cover in the region is 900W, the working time is from 10 o 'clock in the daytime to 4 o' clock in the afternoon, and the effective power is reduced and calculated according to 50%. To further verify the effectiveness of this measure under adverse conditions, the subgrade slope was not provided with a layer of insulation 3 in the simulation calculations.

Under the working condition, the heat collecting pipe is arranged at 12 months and 15 days, and the simulated calculation result geothermal field after the heat collecting pipe is arranged at 1 month and 15 days in winter in the current year is shown in figure 7. Fig. 7 is a cross-sectional view of the roadbed ground temperature at 8:30 morning and under the condition of lowest external environment temperature after the roadbed passes through a heat dissipation process in one night on day 30. It can be seen that, (a) in the aspect of the ground temperature value characteristics, the ground temperature of most areas in the roadbed is in a normal temperature state, the ground temperature of the bearing layer at the lower part of the embankment and the part with higher moisture is in a relatively high temperature area, and the highest temperature can reach 18 ℃; (b) in the aspect of the morphological characteristics of the ground temperature field, the ground temperature contour lines are horizontal and parallel to each other, especially the isothermal lines at 0 ℃ are distributed smoothly, namely the freezing area and the normal temperature area are parallel to each other, wherein the freezing area is only a small amount on the upper part of the roadbed and is distributed uniformly and symmetrically in a thin layer line mode, the frozen soil engineering problem can be effectively solved, and the morphological characteristics are as follows:

(1) the temperature state of the temperature field of the original roadbed central area is improved, the regulation and control requirements of the temperature field of the roadbed of the railway in the frozen soil area in seasons are met, and it can be seen from the graph in FIG. 7 that after the implementation of the embodiment, the earth temperatures of the roadbed central area and the main bearing layer are in the normal temperature state, and normal temperature and high temperature soil nuclei are formed in the center of the roadbed;

(2) the distribution of the 0 ℃ earth temperature contour line and other isothermal lines of the temperature field is completely horizontal and flat, and the freezing areas are distributed on the top of the roadbed and close to the slope protection in a thin layer line mode, so that the stability of the roadbed is greatly improved, as can be seen from figure 7, the distribution of the roadbed temperature field is flat, particularly the distribution of the 0 ℃ isothermal lines is flat, the temperature field is integrally distributed in a convex mode in the roadbed, and the moisture in the roadbed is favorably discharged in the stage of frequent alternate actions of atmospheric precipitation and freeze thawing in early spring, so that the frost heaving amount of the roadbed is obviously reduced;

(3) the influence of yin-yang slope effect is eliminated, the longitudinal roadbed cracking engineering diseases are basically eliminated, and as can be seen from fig. 7, roadbed temperature fields below the road surface are basically distributed symmetrically around the center of the roadbed, the isothermal lines of the temperature fields in the roadbed are distributed smoothly, and the freezing areas are only distributed on the top surface of the roadbed and the thinner strip-shaped areas below the revetment, so that a small amount of transverse differential frost heaving generated at partial freezing positions is further weakened, and the possibility of longitudinal roadbed cracking is further eliminated.

The present example is only a representative analysis for the present invention, and the conclusion of the present example is that the trend (the difference in specific numerical value) basically represents the effect achieved by the present invention.

In addition, simulation calculation shows that the structure provided by the embodiment is used for railway construction in the frozen soil region in seasons, the frozen soil roadbed stores heat energy all the time during operation, and the freezing area in the roadbed is reduced along with the operation time, so that the structure can meet the requirement of roadbed mechanical stability and can maintain the roadbed stable for a long time.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An air power cycle heating apparatus, characterized in that the air power cycle heating apparatus comprises:

the heat collecting box (6) is used for being installed outside the roadbed (2);

one end of the solar heat absorption pipe (7) is inserted into the heat collection box (6) and is communicated with the heat collection box (6);

the convection heat exchange tube (8) is arranged inside the heat collection box (6) and the solar heat absorption tube (7), a first flow channel is formed inside the convection heat exchange tube (8), a second flow channel is formed by the outer wall of the convection heat exchange tube (8) and the outer walls of the heat collection box (6) and the solar heat absorption tube (7), and the first flow channel is communicated with the second flow channel and filled with air;

a convection power element (9) installed in the first flow passage, wherein the convection power element (9) is used for pushing air to flow in the first flow passage and the second flow passage;

gather heat pipe (12), including heat absorption section (13) and the section of sending out heat (14) of intercommunication each other, heat absorption section (13) are inserted in heat collection box (6), send out heat section (14) are arranged in inserting in road bed (2), heat absorption section (13) are used for absorbing the heat of heat collection box (6) and transmit to send out heat section (14), send out heat section (14) and be used for heating road bed (2).

2. An air cycle heating apparatus according to claim 1, wherein the convective heat exchange tube (8) comprises:

a main pipe (81) disposed within the heat collecting tank (6) and extending in a length direction of the heat collecting tank (6);

one end of the branch pipeline (82) is communicated with the main pipeline (81), and the other end of the branch pipeline (82) extends into the solar heat absorption pipe (7) and is communicated with the solar heat absorption pipe (7).

3. An air power cycle heating apparatus according to claim 2, characterized in that the convection power element (9) is a fan mounted in the main duct (81).

4. An air powered circulation heating device according to claim 1, characterised in that a plurality of said solar heat absorption tubes (7) are connected to opposite sides of said heat collection box (6), a plurality of said solar heat absorption tubes (7) located at the same side being arranged at regular intervals.

5. An air powered hydronic heating apparatus according to claim 1, characterized in that said heat absorption section (13) is inserted in the middle upper portion of said heat collecting tank (6) and said solar heat absorption pipe (7) is inserted in the middle lower portion of said heat collecting tank (6).

6. The air power cycle heating apparatus of claim 1, further comprising:

the solar power supply device (10) is electrically connected with the convection power element (9), and the solar power supply device (10) is used for generating power by utilizing solar energy and supplying power to the convection power element (9).

7. The air power cycle heating apparatus of claim 6, further comprising:

the time controller (11) is electrically connected between the solar power supply (10) and the convection power element (9), and the time controller (11) is used for controlling the working time of the convection power element (9).

8. An aerodynamically hydronic road bed, characterized in that, it comprises a road bed (2) and the aerodynamic hydronic apparatus of any one of claims 1 to 7, wherein the heat collection box (6) and the solar heat absorption tube (7) are installed outside the road bed (2), and the heat release section (14) of the heat collection tube (12) is inserted inside the road bed (2).

9. An aerodynamic cycle heating roadbed according to claim 8, characterized in that the aerodynamic cycle heating roadbed further comprises an insulating material layer (3), and the insulating material layer (3) is arranged on the slope surface of the roadbed (2).

10. An aerodynamic cycle heating road bed according to claim 8, characterized in that said aerodynamic cycle heating means are provided on both opposite sides of said road bed (2), and a plurality of said aerodynamic cycle heating means are provided at intervals on one side of said road bed (2).