CN112030650B

CN112030650B - Heat pipe body, heat pipe roadbed system of yin-yang slope roadbed and construction method thereof

Info

Publication number: CN112030650B
Application number: CN202010902445.4A
Authority: CN
Inventors: 裴万胜; 张明义; 晏忠瑞; 赖远明; 张建明
Original assignee: Northwest Institute of Eco Environment and Resources of CAS
Current assignee: Northwest Institute of Eco Environment and Resources of CAS
Priority date: 2020-09-01
Filing date: 2020-09-01
Publication date: 2021-09-24
Anticipated expiration: 2040-09-01
Also published as: CN112030650A

Abstract

The application provides a heat pipe body, a heat pipe and a heat pipe roadbed system of a yin-yang slope roadbed and a construction method thereof, and relates to the technical field of road construction. The heat pipe body includes a pipe body and a first switching device. The tube body is used for containing a condensing medium and comprises a first condensation section and an evaporation section which are arranged along the axial direction. The first switching device is arranged on the tube body and used for enabling the evaporation section and the first condensation section to be communicated or disconnected. The effective working length and the effective working time of the heat pipe with the heat pipe body can be controlled through the first switch device, and the working efficiency of the heat pipe is enhanced.

Description

Heat pipe body, heat pipe roadbed system of yin-yang slope roadbed and construction method thereof

Technical Field

The application relates to the technical field of road construction, in particular to a heat pipe body, a heat pipe and a heat pipe roadbed system of a yin-yang slope roadbed and a construction method thereof.

Background

At present, a heat pipe is the technology with the best cooling effect of monomers in a permafrost active cooling roadbed, but the heat pipe mainly works in cold seasons due to the limitation of the structural form of the heat pipe, and the difference of the ground temperature of the roadbed under a yin-yang slope cannot be effectively adjusted in warm seasons. Due to the limitation of the cooling range of the heated pipe, the uneven distribution of the transverse temperature of the roadbed is easily aggravated by excessive cooling around the pipe. Meanwhile, due to the limitation of the arrangement mode and the installation technology of the heated pipes, the pipe wall and the surrounding soil body often have cavities, so that the heat transfer between the heat pipes and the surrounding soil body is weakened, a moisture channel is easy to form, and the stability of a roadbed is not facilitated.

Disclosure of Invention

The embodiment of the application provides a heat pipe body, a heat pipe roadbed system of a yin-yang slope roadbed and a construction method thereof, and aims to solve the problem that the existing heat pipe cannot effectively adjust the ground temperature difference of the yin-yang slope roadbed.

In a first aspect, an embodiment of the present application provides a heat pipe body, which includes a pipe body and a first switch device. The tube body is used for containing a condensing medium and comprises a first condensation section and an evaporation section which are arranged along the axial direction. The first switching device is arranged on the tube body and used for enabling the evaporation section and the first condensation section to be communicated or disconnected.

In the above technical solution, generally, the evaporation section of the heat pipe is covered inside the yin-yang slope roadbed, and the condensation section extends out of the yin-yang slope roadbed. When the heat pipe with the heat pipe body is used, the evaporation section is located inside the yin-yang slope roadbed, and the first condensation section extends out of the yang slope of the yin-yang slope roadbed. In cold seasons, the first switch is opened, and evaporation zone and first condensation segment intercommunication, evaporation zone have absorbed the heat evaporation of condensing medium, and the condensing medium after the heat absorption evaporation becomes the gaseous state to flow to first condensation segment, carry out the heat exchange at first condensation segment and external, realize the cooling to the road bed, the road bed difference in temperature under the reduction cloudy sunny slope. In warm seasons, the first switch device can be closed, so that the evaporation section and the first condensation section are disconnected, and under the temperature difference of the yin-yang slope, the condensation medium in the pipe only circulates in the evaporation section, so that the temperature difference of the yin-yang slope can be regulated and controlled in warm seasons.

In addition, the heat pipe body of the embodiment of the first aspect of the present application has the following additional technical features:

in some embodiments of the first aspect of the present application, the tube body further comprises a second condenser section and a second switching device; the second condensation section is arranged on one side of the evaporation section far away from the first condensation section; the second switching device is arranged on the tube body and used for connecting or disconnecting the evaporation section and the second condensation section.

Among the above-mentioned technical scheme, at the in-process that uses the heat pipe that has this heat pipe body, the evaporation zone is located negative and positive slope road bed, and first condensation segment and second condensation segment extend from negative slope and positive slope of negative and positive slope road bed respectively, can control the effective working length and the effective operating time of the heat pipe that has this heat pipe body through first switching device and second switching device, strengthen the work efficiency of heat pipe.

In some embodiments of the first aspect of the present application, the heat pipe body further comprises a fin, and an outer wall of at least one of the first condensation section and the second condensation section is provided with a fin.

In the technical scheme, the arrangement of the fins can increase the heat exchange area inside and outside the heat pipe body and strengthen the working efficiency of the heat pipe.

In some embodiments of the first aspect of the present application, the fins are plural, and the plural fins are arranged at intervals in the circumferential direction of the tube body.

Among the above-mentioned technical scheme, along a plurality of fins of the circumference interval arrangement of pipe body, can further increase the internal and external heat exchange area of heat pipe, strengthen the work efficiency of heat pipe.

In some embodiments of the first aspect of the present application, the inner wall of the evaporator end is provided with a recess for accommodating a condensing medium.

Among the above-mentioned technical scheme, the condensing medium that is liquid can collect in the depressed part for gaseous condensing medium can flow to both ends from the middle part of pipe body, so that condensing medium can be better take away the heat of negative and positive slope base inside.

In some embodiments of the first aspect of the present application, the tube body further includes a first insulation section, the first condensation section and the evaporation section are connected through the first insulation section, the first insulation section is communicated with the first condensation section, and the first switch device can connect or disconnect the first insulation section and the evaporation section.

Among the above-mentioned technical scheme, the length of the pipe body has been increased in setting up of first insulation section, can adapt to the great cloudy sunny slope road bed of cloudy slope and sunny slope distance for the application scope of this heat pipe body is wider.

In some embodiments of the first aspect of the present application, the wall of the first insulating section is provided with an insulating layer.

Among the above-mentioned technical scheme, the setting of insulating layer can avoid condensing medium and negative slope road base emergence heat exchange at the in-process condensing medium that flows between first condensation zone and evaporation zone.

In a second aspect, an embodiment of the present application provides a heat pipe, which includes a condensation medium and the heat pipe body provided in the first aspect, where the condensation medium is accommodated in a pipe body of the heat pipe body, and the condensation medium can exchange heat with an outside of the pipe body.

In the technical scheme, the heat pipe can flexibly regulate and control the effective working length and working time of the heat pipe according to requirements through the first switch device, and the working efficiency of the heat pipe is enhanced.

In a third aspect, an embodiment of the present application provides a heat pipe roadbed system of a yin-yang slope roadbed, including the yin-yang slope roadbed and the heat pipe provided in the embodiment of the second aspect; the evaporation section of the heat pipe is positioned in the negative and positive slope roadbed, and the first condensation section of the heat pipe extends out of the negative slope or positive slope of the negative and positive slope roadbed.

Among the above-mentioned technical scheme, can control the effective working length and the operating time of heat pipe to yin sun slope road bed through first switching device.

In some embodiments of the third aspect of the present application, the heat pipe roadbed system of the yin-yang slope roadbed further comprises an insulation board, and the insulation board is located in the yin-yang slope roadbed.

Among the above-mentioned technical scheme, the setting of heat preservation heat insulating board can reduce the heat transfer on cloudy sunny slope road bed and road surface, is favorable to the control of cloudy sunny slope road bed's temperature.

In some embodiments of the third aspect of the present application, the yin-yang slope based heat pipe ballast system comprises a plurality of heat pipes arranged at intervals.

Among the above-mentioned technical scheme, the setting of a plurality of heat pipes can increase and adjust the intensity of yin sunny slope road bed through the heat pipe, improves regulation efficiency, more is favorable to yin sunny slope road bed inside temperature distribution even.

In a fourth aspect, the embodiment of the present application provides a construction method for a heat pipe roadbed system of a yin-yang slope roadbed, comprising the steps of paving a first layer of roadbed filling on the ground surface; laying a heat pipe lower cushion layer on the first layer of roadbed; arranging at least one heat pipe provided by the embodiment of the second aspect on the lower cushion layer of the heat pipe; laying a second layer of roadbed filling above the heat pipes; paving a lower cushion layer of the heat-insulating plate on the second layer of roadbed filling; laying a heat insulation board on the lower cushion layer of the heat insulation board; laying an upper cushion layer of the heat insulation plate on the heat insulation plate; and paving a pavement structure layer on the upper cushion layer of the heat insulation plate.

In the technical scheme, the construction method of the heat pipe roadbed system of the yin-yang slope roadbed avoids the problem of holes in the roadbed caused by the existing drilling type heat pipe roadbed construction method, realizes the close contact of the heat pipes and the roadbed, and overcomes the problem of holes in the roadbed caused by the existing heat pipe installation technology.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required 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 application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic view of a heat pipe body according to an embodiment of the present disclosure;

fig. 2 is a cross-sectional view of a heat pipe body according to an embodiment of the present application;

FIG. 3 is a cross-sectional view of an evaporation section;

FIG. 4 is a schematic view of a negative-positive slope subgrade;

FIG. 5 is a schematic view of a heat pipe buried in a negative-positive slope roadbed;

fig. 6 is a schematic view of the construction of a heat pipe roadbed system of a yin-yang slope roadbed.

Icon: 100-a heat pipe body; 10-a tube body; 11-a first condensation section; 12-an evaporation section; 121-a recess; 13-a second condensation section; 14-a first insulating section; 15-a second adiabatic section; 16-a thermally insulating layer; 17-an opening; 18-a fin; 20-a first switching device; 30-a second switching device; 40-a sealing cover; 200-yin-yang slope roadbed; 210-shade slope; 220-sunny slope; 230-filling the first roadbed; 240-heat pipe lower cushion layer; 250-filling soil in the second layer of roadbed; 260-insulation board lower cushion layer; 270-heat preservation and insulation board; 280-an upper cushion layer of the heat-insulation plate; 290-a pavement structure layer; 1000-heat pipe; 2000-earth surface.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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 application.

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

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 embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Examples

Frozen earth is a special rock-soil with the temperature of 0 ℃ or below 0 ℃ and containing ice. It is very sensitive to temperature changes, and the climate warming and engineering construction will cause the frozen soil to heat up and degrade, affecting the stability of the upper road. The difference of solar radiation absorbed by the side slopes on the two sides of the roadbed (also called yin-yang slopes) further aggravates diseases of the frozen soil roadbed, induces uneven deformation, longitudinal cracking and the like of the roadbed, and directly influences the service function of the road. The heat pipe 1000 is an active cooling technology with the most obvious monomer cooling effect in the permafrost roadbed, and is widely applied to the stability maintenance of the permafrost roadbed in some major projects. The inventors have found that the heat pipes 1000 in the frozen earth roadbed are mainly vertically or obliquely installed on both sides of the roadbed. Due to the structural form limitation of the heated pipe 1000, the heat pipe 1000 mainly works in cold seasons, and the earth temperature difference of the roadbed under the yin-yang slope cannot be effectively adjusted in warm seasons. Due to the limited cooling range of the heated pipe 1000, excessive cooling around the pipe tends to aggravate the uneven distribution of the lateral temperature of the roadbed. Meanwhile, the drilling type installation mode of the existing heat pipe 1000 cannot ensure the close contact between the heat pipe 1000 and the hole wall, which easily causes the holes in the roadbed, thereby not only affecting the heat transfer of the heat pipe 1000, but also forming a moisture channel, and being not beneficial to the stability of the roadbed. Therefore, the defects such as uneven deformation and longitudinal cracks of the partial negative-positive slope subgrade 200 are continuously developed after the heat pipe 1000 is used.

The negative-positive slope subgrade 200 is a subgrade with a negative slope 210 and a positive slope 220 which receive different solar radiation, and the negative slope 210 and the positive slope 220 are determined according to the magnitude of the solar radiation absorbed by the slopes on the two sides of the subgrade and are related to the trend of the subgrade, the height of the subgrade and the local solar radiation angle. The greater the amount of solar radiation absorbed is the sunny slope 220, and conversely the cloudy slope 210.

As shown in fig. 1 to 3, an embodiment of the present application provides a heat pipe body 100, where the heat pipe body 100 includes a pipe body 10, a first switch device 20, and a second switch device 30.

The tube body 10 is used for containing a condensing medium, and the tube body 10 includes a first condensation section 11, an evaporation section 12 and a second condensation section 13 which are arranged along the axial direction. The first switching device 20 is provided in the tube body 10, and the first switching device 20 is used to connect or disconnect the evaporation section 12 and the first condensation section 11. The second condensation section 13 is arranged on one side of the evaporation section 12 far away from the first condensation section 11; the second switching device 30 is provided in the tube body 10, and the second switching device 30 is used to connect or disconnect the evaporation section 12 and the second condensation section 13. The first condensation section 11 and the second condensation section 13 are respectively arranged at two axial ends of the evaporation section 12, so that the cooling function of the heat pipe 1000 can be improved, and the lengths of the first condensation section 11 and the second condensation section 13 can be equal or unequal according to the actual difference degree of the yin slope and the yang slope.

The segments of the heat pipe body 100 are divided according to the functions they perform. The evaporation section 12 is a heat absorption and vaporization area of the condensing medium, and the first condensation section 11 and the second condensation section 13 are cold-encountering and liquefaction areas of the vapor-state condensing medium in the pipe.

In this embodiment, referring to fig. 2 and fig. 3, the condensing section and the second condensing section 13 have the same wall thickness, and the inner wall of the evaporating section 12 is provided with a recess 121 for accommodating the condensing medium. When the heat-absorbing type condenser is installed in the negative and positive slope roadbed 200, the concave part 121 is located below, so that liquid-state condensing mediums can be collected from the first condensation section 11 and the second condensation section 13 to the evaporation section 12 and finally collected in the concave part 121, and after the condensing mediums absorb heat in the evaporation section 12 and become gaseous, the gaseous condensing mediums can flow from the evaporation section 12 to the first condensation section 11 and the second condensation section 13, so that the condensing mediums can better take away heat inside the negative and positive slope roadbed 200.

In some embodiments, the tube body 10 may also include only the first condensation section 11 and the evaporation section 12, the first condensation section 11 is connected with the evaporation section 12, and the first switch device 20 can connect or disconnect the first condensation section 11 and the evaporation section 12.

Further, with reference to fig. 2, the tube body 10 further includes a first insulating section 14 and a second insulating section 15, and the first insulating section 14 and the second insulating section 15 are sections of the heat pipe body 100 that do not exchange heat with the outside. The first condensation section 11 and the evaporation section 12 are connected through a first heat insulation section 14, the first heat insulation section 14 is communicated with the first condensation section 11, and the first switch device 20 can enable the first heat insulation section 14 and the evaporation section 12 to be communicated or disconnected. The second condensation section 13 and the evaporation section 12 are connected through a second heat insulation section 15, the second heat insulation section 15 is communicated with the second condensation section 13, and the second switch device 30 can enable the second heat insulation section 15 to be communicated with or disconnected from the evaporation section 12. The first insulating section 14 and the second insulating section 15 are arranged to increase the length of the pipe body 10, and can be adapted to the yin-yang slope roadbed 200 with a large distance between the yin slope 210 and the yang slope 220, so that the application range of the heat pipe body 100 is wider. In some embodiments, the pipe body 10 may not include the first and second insulating

segments

14 and 15.

The inner walls of the first insulating section 14 and the second insulating section 15 are provided with an insulating layer 16. The heat insulation layer 16 is arranged to prevent the heat exchange between the condensing medium and the negative and positive sloping roadbed 200 in the process that the condensing medium flows between the first condensation section 11 and the evaporation section 12 and between the second condensation section 13 and the evaporation section 12. In some embodiments, the thermal insulation layer 16 may be disposed on the outer wall of the first thermal insulation section 14 and the second thermal insulation section 15, and of course, the thermal insulation layer 16 may be disposed on both the inner wall and the outer wall of the first thermal insulation section 14 and the inner wall and the outer wall of the second thermal insulation section 15.

The first and

second switching devices

20 and 30 may have various structures, for example, the first and

second switching devices

20 and 30 are switching valves.

In order to fill the condensing medium into the tube body 10, an opening 17 is formed at one end of the tube body 10, an external thread is formed on an outer wall of the end of the opening 17, the heat tube body 100 further includes a sealing cover 40 for closing or opening the opening 17 of the tube body 10, and the sealing cover 40 has an internal thread engaged with the external thread. After the condensing medium is filled, the sealing cover 40 is screwed through the matching of the internal thread of the sealing cover 40 and the external thread of the pipe body 10 to close the opening 17 of the pipe body 10, so that the condensing medium is prevented from leaking. In other embodiments, the sealing cover 40 may have other structures, for example, the sealing cover 40 has a plunger structure, and the sealing cover 40 is inserted into the opening 17 of the tube body 10.

Further, the heat pipe body 100 further includes fins 18, and the fins 18 are provided on the outer wall of at least one of the first condensation section 11 and the second condensation section 13. In the present embodiment, the outer walls of the first condensation section 11 and the second condensation section 13 are provided with a plurality of fins 18, and the plurality of fins 18 are arranged at intervals along the circumferential direction of the tube body 10. The arrangement of the fins 18 can increase the heat exchange area inside and outside the heat pipe body 100, and enhance the working efficiency of the heat pipe 1000. The two fins 18 are oppositely arranged along the radial direction of the tube body 10, so that the internal and external heat exchange areas of the heat tube body 100 can be further increased, and the working efficiency of the heat tube 1000 can be enhanced. Since the first condenser section 11 and the second condenser section 13 are exposed to the environment in practical engineering, the fins 18 are also exposed to the environment and parallel to the direction of the ambient airflow. The number of fins 18 may be two, three, or other numbers of more than three.

The embodiment of the present application further provides a heat pipe 1000, which includes a condensation medium and the heat pipe body 100 provided in the first aspect, where the condensation medium is accommodated in the pipe body 10 of the heat pipe body 100, and the condensation medium can exchange heat with the outside of the pipe body 10.

In practical engineering, the pipe body 10 of the heat pipe body 100 is horizontally arranged relative to the yin-yang slope roadbed 200, the evaporation section 12 of the pipe body 10 is embedded inside the yin-yang slope roadbed 200, the concave portion 121 inside the evaporation section 12 is located below, and the first condensation section 11, the second condensation section 13, the first heat insulation section 14 and the second heat insulation section 15 respectively extend out of the yin-yang slope roadbed 200 to expose the yin slope 210 and the yang slope 220 to the environment. For ease of control, the first and

second switching devices

20, 30 are also exposed to the environment.

In cold seasons, the first switch device 20 and the second switch device 30 of the heat pipe 1000 are turned on to the maximum, so that the first condensation section 11, the first insulation section 14, the evaporation section 12, the second insulation section 15 and the second condensation section 13 are sequentially communicated, vaporized condensation medium moves in the whole pipe, the release of heat of the negative and positive slope foundations 200 can be enhanced by using low environmental temperature, and the cooling effect of the heat pipe 1000 is improved.

In warm seasons, the first switch device 20 and the second switch device 30 of the heat pipe 1000 are turned off, that is, the first condensation section 11, the first insulation section 14 and the evaporation section 12 are disconnected, the second condensation section 13, the second insulation section 15 and the evaporation section 12 are disconnected, the effective working length of the heat pipe 1000 is adjusted to the evaporation section 12 embedded in the negative and positive slope roadbed 200, and the vapor-state condensation medium in the pipe moves only in the evaporation section 12, so that the effective working length of the heat pipe 1000 is changed, thereby not only preventing the environmental heat from being transferred to the interior of the negative and positive slope roadbed 200 through the heat pipe 1000, but also realizing the balance of the heat in the negative and positive slope roadbed 200. And (5) delivery. Meanwhile, due to the existence of the yin-yang slope 220, the warm-season heat pipe 1000 continuously works, so that the limitation that the existing heat pipe 1000 does not work in a warm season is changed, and the energy regulation and control efficiency of the roadbed of the heat pipe 1000 is greatly improved.

The cold season and the warm season may be defined according to the temperature suitable for the roadbed, and generally, the turn-off time of the first switching device 20 and the second switching device 30 of the heat pipe 1000 is from 9 months to 10 months (the warm season), and the turn-on time of the first switching device 20 and the second switching device 30 is from 3 months to 4 months (the cold season) in the next year.

The embodiment of the application also provides a heat pipe roadbed system of the yin-yang slope roadbed, and the heat pipe roadbed system of the yin-yang slope roadbed comprises the yin-yang slope roadbed 200 and the heat pipe 1000 provided by the embodiment; the evaporation section 12 of the heat pipe 1000 is located in the yin-yang slope roadbed 200, and the first condensation section 11 of the heat pipe 1000 extends out of the yin-yang slope roadbed 200 to form the yin slope 210 or the yang slope 220.

As shown in fig. 4 and 5, the yin-yang slope subgrade 200 includes a yin slope 210 and a yang slope 220, and the yin slope 210 and the yang slope 220 absorb solar radiation differently. The heat pipe 1000 is horizontally arranged along the arrangement direction of the negative slope 210 and the positive slope 220, the first condensation section 11, the second condensation section 13, the first heat insulation section 14, the second heat insulation section 15 and the fins 18 are all exposed to the environment, and the evaporation section 12 is buried in the negative and positive slope roadbed 200. In cold seasons, the first switch device 20 and the second switch device 30 of the heat pipe 1000 are turned on, so as to cool the negative and positive slope roadbed 200. In warm seasons, the first switching device 20 and the second switching device 30 are turned off, and the temperature between the yin slope 210 and the yang slope 220 of the yin-yang slope roadbed 200 is regulated through the evaporation section 12. The effective working length and working time of the heat pipe 1000 can be flexibly regulated and controlled according to requirements, and the working efficiency of the heat pipe 1000 is enhanced.

In this embodiment, the heat pipe roadbed system of the yin-yang slope roadbed comprises a plurality of heat pipes 1000 arranged at intervals. The respective heat pipes 1000 are arranged at intervals in a direction perpendicular to the extending direction of the heat pipes 1000. The distance between two adjacent heat pipes 1000 is 2.0 m-4.0 m, and of course, the number of heat pipes 1000 and the distance between the heat pipes 1000 can be properly adjusted according to the actual needs and the size of the yin-yang slope roadbed 200. The heat pipe roadbed system of the yin-yang slope roadbed shown in the embodiment includes two heat pipes 1000, and in other embodiments, the heat pipe roadbed system of the yin-yang slope roadbed may also include one, three or more heat pipes 1000 in other numbers.

The arrangement of the heat pipes 1000 can increase the strength of the yin-yang slope roadbed 200 adjusted by the heat pipes 1000, improve the adjusting efficiency and be more beneficial to the uniform temperature distribution in the yin-yang slope roadbed 200.

Further, the heat pipe roadbed system of the yin-yang slope roadbed also comprises a heat insulation board 270, and the heat insulation board 270 is arranged in the yin-yang slope roadbed 200. The arrangement of the heat insulation board 270 can reduce the heat transfer between the negative and positive slope roadbed 200 and the road surface, and is beneficial to the control of the temperature of the negative and positive slope roadbed 200.

The embodiment of the present application further provides a construction method for a heat pipe roadbed system of an yin-yang slope roadbed, and the construction method for the heat pipe roadbed system of the yin-yang slope roadbed comprises:

as shown in fig. 6, an original ground surface 2000 is cleaned, a foundation is tamped, a first layer of roadbed filling 230 is paved on the ground surface 2000, rolling is carried out until the degree of compaction reaches the standard, then a first layer of coarse sand cushion layer in the first layer of roadbed filling 230 is paved on the first layer of roadbed filling 230 to serve as a heat pipe lower cushion layer 240, the grain size of gravel is not more than 10mm, the mud content is not more than 5%, the thickness after compaction is 0.1m, heat pipes 1000 are arranged on the heat pipe lower cushion layer 240 at intervals, after the arrangement of the heat pipes 1000 is completed, paving and watering are carried out, a second layer of roadbed filling 250 is rolled between two adjacent heat pipes 1000, the distance between the initial heat pipe 1000 and the distance between the adjacent heat pipes 1000 are combined in the rolling process, and accurate positioning is carried out, so that the seamless contact between the roadbed and the heat pipes 1000 is ensured, and the distance between the adjacent heat pipes is ensured to meet the design requirement. When the compactness is detected to be qualified, paving a heat-insulating plate underlayer 260 on a second-layer roadbed filling 250, wherein the heat-insulating plate underlayer 260 adopts a medium-coarse sand underlayer, the particle size of gravel is not more than 10mm, the mud content is not more than 5%, the thickness after compaction is 0.1-0.2 m, paving heat-insulating plates 270 on the heat-insulating plate underlayer 260 in sequence, connecting adjacent heat-insulating plates 270 in a flush joint or embedded lap joint mode, paving and rolling an upper underlayer of the heat-insulating plates 270 on the heat-insulating plates 270 after finishing paving, and finally constructing a pavement structure layer 290. The construction method of the heat pipe roadbed system of the yin-yang slope roadbed provided by the application avoids the problem of holes in the roadbed caused by the existing drilling type heat pipe roadbed construction method, realizes the close contact of the heat pipe 1000 and the roadbed, and overcomes the problem of holes in the roadbed caused by the existing heat pipe installation technology. Wherein, the first roadbed filling 230, the heat pipe lower cushion 240, the second roadbed filling 250, the heat insulation board lower cushion 260, the heat insulation board 270 and the heat insulation board upper cushion 280 together form the yin-yang sloping roadbed 200.

According to the heat pipe 1000, the heat roadbed system of the yin-yang slope roadbed and the construction process thereof, the structure of the heat pipe 1000 can flexibly control the effective working length of the heat pipe 1000 according to actual needs. The roadbed system provided with the heat pipe 1000 is used for permafrost regions and warm seasons, the first switch device 20 and the second switch device 30 of the heat pipe 1000 are opened, and the first switch device 20 and the second switch device 30 of the heat pipe 1000 are closed in cold seasons, so that the cooling efficiency of the heat pipe 1000 in cold seasons is enhanced, and the lengths of the condensation sections on two sides can be flexibly set according to the temperature difference of the yin-yang slope 220. Meanwhile, the heat pipe 1000 can also effectively regulate and control the subgrade ground temperature difference distribution caused by the yin-yang slope by controlling the effective working length of the heat pipe, so that the problem of asymmetry of a subgrade temperature field is solved, and the long-term stability of the subgrade is improved.

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

Claims

1. A heat pipe body, comprising:

the tube body is used for containing a condensing medium and comprises a first condensation section and an evaporation section which are arranged along the axial direction; and

the first switching device is arranged on the tube body and used for enabling the evaporation section and the first condensation section to be communicated or disconnected.

2. A heat pipe body as claimed in claim 1 wherein said pipe body further comprises a second condenser section and a second switching device;

the second condensation section is arranged on one side of the evaporation section far away from the first condensation section;

the second switching device is arranged on the tube body and used for connecting or disconnecting the evaporation section and the second condensation section.

3. A heat pipe body as claimed in claim 2 wherein said heat pipe body further comprises fins, an outer wall of at least one of said first and second condenser sections being provided with said fins.

4. A heat pipe body as claimed in claim 3, wherein said fins are plural and are arranged at intervals in the circumferential direction of said pipe body.

5. A heat pipe body as claimed in claim 1 wherein the inner wall of said evaporator end is provided with a depression for receiving said condensing medium.

6. A heat pipe body as claimed in claim 1, wherein said pipe body further comprises a first heat insulating section, said first condensation section and said evaporation section are connected through said first heat insulating section, said first heat insulating section is in communication with said first condensation section, and said first switching means can connect or disconnect said first heat insulating section and said evaporation section.

7. A heat pipe body as claimed in claim 6 wherein the wall of said first thermally insulating section is provided with a layer of thermal insulation.

8. A heat pipe comprising a condensation medium and a heat pipe body as claimed in any one of claims 1 to 7, wherein the condensation medium is contained in the pipe body of the heat pipe body, and the condensation medium is capable of exchanging heat with the outside of the pipe body.

9. A yin-yang slope roadbed based heat pipe roadbed system, which is characterized by comprising a yin-yang slope roadbed and the heat pipe according to claim 8;

the evaporation section of the heat pipe is positioned at the lower part of the yin-yang slope roadbed, and the first condensation section of the heat pipe extends out of a yin slope or a yang slope of the yin-yang slope roadbed.

10. The yin-yang slope roadbed based heat pipe roadbed system according to claim 9, wherein the yin-yang slope roadbed heat pipe roadbed system further comprises heat insulation boards, and the heat insulation boards are positioned in the yin-yang slope roadbed.

11. The yin-yang slope roadbed based heat pipe roadbed system according to claim 9, wherein the yin-yang slope roadbed based heat pipe roadbed system comprises a plurality of heat pipes arranged at intervals.

12. A construction method for a heat pipe roadbed system of a yin-yang slope roadbed is characterized by comprising the following steps:

laying a first layer of roadbed filling on the ground surface;

paving a heat pipe lower cushion layer on the first roadbed;

laying at least one heat pipe according to claim 8 on the heat pipe under-cushion layer;

laying a second layer of roadbed filling above the heat pipes;

paving a lower cushion layer of the heat-insulation plate on the second layer of roadbed filling;

laying a heat insulation board on the lower cushion layer of the heat insulation board;

laying an upper cushion layer of the heat-insulating plate on the heat-insulating plate;

and paving a pavement structure layer on the upper cushion layer of the heat insulation plate.