CN209798463U - Heat pipe type solar thermal device for roadbed frost heaving - Google Patents
Heat pipe type solar thermal device for roadbed frost heaving Download PDFInfo
- Publication number
- CN209798463U CN209798463U CN201920106718.7U CN201920106718U CN209798463U CN 209798463 U CN209798463 U CN 209798463U CN 201920106718 U CN201920106718 U CN 201920106718U CN 209798463 U CN209798463 U CN 209798463U
- Authority
- CN
- China
- Prior art keywords
- pipe
- heat
- tube
- frost heaving
- joint
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
Landscapes
- Road Paving Structures (AREA)
Abstract
The utility model is suitable for a road bed engineering construction and maintenance technical field provides a heat pipe formula solar thermal device to road bed frost heaving, including the light and heat conversion pipe, the light and heat conversion pipe overcoat has the light transmission pipe, is the vacuum cavity between light and heat conversion pipe and the light transmission pipe, and the light and heat conversion pipe both ends are connected first joint and second joint respectively, are equipped with the end cover on the first joint to make one end of light and heat conversion pipe form sealedly; one end of the radiating pipe is connected with the second joint and communicated with the photothermal conversion pipe, the other end of the radiating pipe is provided with a conical guide cap, and the interior of the photothermal conversion pipe and the interior of the radiating pipe are filled with a first heat transfer medium; the first tube shell is located the inside of light and heat conversion pipe, and the second tube shell passes through the support to be fixed in the inside of cooling tube, and the one end of first tube shell and the one end of second tube shell are passed through the sealing member and are connected, and first tube shell and the inside conduction of second tube shell have filled the second heat transfer medium in first tube shell and the inside pouring of second tube shell, solve the unsatisfactory problem of road bed frost heaving prevention measure effect.
Description
Technical Field
The utility model belongs to the technical field of road bed engineering construction and maintenance, especially, relate to a heat pipe formula sunlight heat facility to road bed frost heaving.
Background
An important feature of the earth surface soil in seasonal frozen soil areas is the phenomenon of winter freezing and spring thawing caused by seasonal positive and negative alternate changes in temperature. The phenomenon of freezing and thawing in winter of a soil body is essentially the solid-liquid phase change process of water in soil, and because the densities of the water in a solid phase and a liquid phase are different, the volume of the water with the same mass in the solid phase is 9 percent larger than that in the liquid phase, and the soil body expands in a negative temperature state. Therefore, in some areas with much rainfall, abundant underground water, dense soil and large seasonal temperature difference, the phenomena of frost heaving, swelling and melting subsidence of the earth surface can occur along with the seasonal change of the soil body temperature in a certain depth range of the earth surface. When the engineering construction is carried out in the region, the upper building or structure can generate deformation stability problem and even destroy phenomenon along with the natural property of frost heaving and thawing sinking of the foundation. In addition, in the case of buildings and building bodies, due to the durability, porosity and water storage of building materials, various freezing damages are caused by the positive and negative temperature change processes under the influence of natural environment.
Road engineering is one of the important indicators of the sophistication of infrastructure. Wherein, the roadbed, the bridge and the tunnel are three important components of road engineering. In a seasonal frozen soil area, compared with a bridge and a tunnel, a roadbed has some unique specificities, and firstly, the roadbed is directly filled on the ground surface and is more easily influenced by severe stratum conditions, including factors such as underground water, foundation bearing capacity and the like, compared with the bridge; secondly, the roadbed is directly exposed in the natural environment, and is more easily influenced by severe natural environment conditions compared with a tunnel, wherein the factors comprise atmospheric precipitation, atmospheric temperature, solar radiation and the like; thirdly, the roadbed body is a discrete material filled by graded soil, and due to the porosity, heterogeneity and natural variability of soil, the phenomena of large fluctuation of moisture and temperature, deformation and damage of the material are more likely to occur. In summary, roadbed engineering in cold regions generally faces the threat of frost heaving due to the particularity of roadbed bodies and environmental conditions.
Due to the importance of road engineering traffic conditions and high requirements on the smoothness of the roadbed, the problem of frost heaving deformation of the roadbed in a cold region is very important. Correspondingly, to cold district road bed frost heaving disease, in road bed construction and management and maintenance field research and adopted the multiple frost heaving prevention and cure measures of multiclass, include:
(1) Foundation treatment and filler soil property improvement, specifically foundation replacement and filler improved soil and the like.
(2) The filler and the foundation moisture control are specifically provided with a waterproof, draining and water-proof structure.
(3) The temperature of the filler and the foundation is controlled, and the structure types of the heat-insulating material comprise a heat-insulating interlayer, a heat-insulating slope protection and the like.
The measures are mainly implemented in the construction stage, and the main purposes are to prevent frost heaving and reduce frost heaving deformation. The limitation is that, on one hand, the occurrence of the frost heaving phenomenon cannot be strictly controlled; on the other hand, when the frost heaving phenomenon occurs to the roadbed, an emergency rescue measure for quickly eliminating the frost heaving is lacked.
For a ballastless track of a high-speed railway, because a coarse-grained gravel road bed in the ballasted track is replaced by adopting an integral foundation such as concrete, asphalt mixture and the like, although the stability is good for a long time, the capability of the ballastless track adapting to settlement deformation of a substructure is greatly reduced, and the maintenance difficulty is high. Particularly, when the ballastless track has frost heaving, the frost heaving deformation of the roadbed can not be balanced by adjusting the height of ballast of the ballast bed like a ballast track due to good integrity, so that a more effective and convenient frost heaving prevention measure is urgently needed.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a heat pipe formula solar thermal device to road bed frost heaving to solve the not ideal problem of road bed frost heaving prevention measure effect among the prior art.
In order to solve the technical problem, the utility model provides a heat pipe type solar thermal device for subgrade frost heaving, which comprises a solar vacuum heat collection component for converting solar energy into heat energy, a heat dissipation component for transferring heat and a liquid core type heat pipe component for promoting the heat to be transferred from the solar vacuum heat collection component to the heat dissipation component;
The solar vacuum heat collection assembly comprises a photo-thermal conversion tube, a light transmission tube is sleeved outside the photo-thermal conversion tube, the axis of the photo-thermal conversion tube is superposed with the axis of the light transmission tube, a vacuum cavity is formed between the photo-thermal conversion tube and the light transmission tube, the two ends of the photo-thermal conversion tube are hermetically connected, the two ends of the photo-thermal conversion tube are respectively connected with a first joint and a second joint, and an end cover is arranged on the first joint to seal one end of the photo-thermal conversion tube;
The heat dissipation assembly comprises a heat dissipation tube, one end of the heat dissipation tube is connected with the second joint and is communicated with the photo-thermal conversion tube, the other end of the heat dissipation tube is provided with a conical guide cap, a first heat transfer medium is filled in the photo-thermal conversion tube and the heat dissipation tube, and the outer wall of the heat dissipation tube is provided with heat dissipation fins;
The liquid core type heat pipe assembly comprises a first pipe shell and a second pipe shell, wherein the first pipe shell is located inside the photothermal conversion pipe, the second pipe shell is fixed inside the radiating pipe through a support, one end of the first pipe shell is connected with one end of the second pipe shell through a sealing piece, the first pipe shell is communicated with the inside of the second pipe shell, the other end of the first pipe shell is sealed, the other end of the second pipe shell is sealed, and a second heat transfer medium is poured into the first pipe shell and the inside of the second pipe shell.
Further, the inner wall of the first pipe shell and the inner wall of the second pipe shell are provided with liquid absorption cores.
Furthermore, the liquid absorption core is tightly attached to the inner wall of the first pipe shell and the inner wall of the second pipe shell through a steel wire mesh.
Further, the photothermal conversion tube is a metal tube with the outer wall plated with a solar selective absorption film.
furthermore, the light transmission tube is a glass tube with an anti-reflection film plated on the outer wall.
Further, the first joint and the second joint are both deformation compensators, each deformation compensator comprises an inner sleeve and an outer sleeve which can move relatively in the axial direction, the inner sleeves are connected with the photothermal conversion tubes, and the outer sleeves are connected with the light transmission tubes.
further, the internal conduction space of the first tube shell and the second tube shell is in a negative pressure environment.
Furthermore, an evaporable getter is arranged in the vacuum cavity.
Further, the one end of cooling tube through reducing type threaded connector with second articulate, reducing type threaded connector is equipped with the different screwed pipe of two internal diameters, the one end of cooling tube is connected a screwed pipe of reducing type threaded connector, second articulate another screwed pipe of reducing type threaded connector.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
(1) Compared with the existing measures of improving the soil quality of the roadbed filling, controlling the moisture, passively preserving the heat and the like, the device can start from the angle of the temperature of the roadbed and regulate and control the temperature change of the roadbed more actively. In particular, the heat can be collected, converted and transferred all the year round under the condition of solar radiation, and compared with the heat balance state of the roadbed under the natural condition, the heat input quantity of the roadbed can be actively increased, thereby increasing the average temperature level of the roadbed all the year round. On one hand, the heat input is greatly increased by utilizing the high radiation amount condition in summer, so that the temperature level of the roadbed in winter is improved, and the frost heaving resistance is improved. On the other hand, under the condition of good solar radiation condition in winter, heat can be input in real time to compensate the excessive heat loss of the roadbed, so that the roadbed temperature is comprehensively kept above the freezing point temperature, and the frost heaving phenomenon can be eliminated. Compared with the existing frost heaving prevention measures, the device can further prevent frost heaving.
(2) The anti-frost-heaving effect of the device is solar energy which is renewable heat energy with the most extensive distribution and the most abundant reserves. The subgrade with frost heaving diseases is generally located in northern high-latitude and high-altitude areas, and the areas are the areas with abundant solar energy distribution, so that the solar energy has resource conditions on regional distribution for the subgrade frost heaving problem. Meanwhile, the roadbed project is generally positioned at a position where the terrain is relatively flat, the sun irradiation condition is good, and the roadbed project is convenient to take.
(3) the device can autonomously realize a series of working procedures of photo-thermal conversion, heat storage, roadbed heat supply and the like of solar radiation energy, and is a self-integrated and self-driven complete heat supply device. Especially, the device practicality degree is high, and the artificial demand of controlling is low, and unmanned on duty that can be long-time is fit for using in the abominable, inconvenient long distance road bed engineering of artifical guard on duty of environment.
(4) The device is simple in component composition and form, compact in structure, high in overall strength and good in stability, and is suitable for being applied to roadbed vibration working conditions. On the other hand, the functional components are in a vertical column shape, and design schemes such as arrangement positions, intervals, angles, geometric dimensions and the like can be flexibly adjusted. In particular, the point type distribution scheme which is convenient for long-distance continuous distribution is suitable for roadbed dispersion and large-depth frost heaving distribution characteristics.
(5) The second heat transfer medium with a gas-liquid two-phase circulation function is filled in the liquid core type heat pipe assembly adopted by the device, and the solar heat energy collected by the solar vacuum heat collection assembly can be efficiently and quickly transferred to the roadbed heat dissipation assembly by combining the first heat transfer medium with static heat conduction. The device has the advantages of high starting speed of the heat supply function, fixed heat supply starting temperature and one-way heat transfer performance, and better heat supply function and anti-frost-heaving effect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
fig. 1 is a schematic structural view of a heat pipe type solar thermal apparatus for frost heaving of a roadbed according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of the cross-section A-A of FIG. 1;
FIG. 3 is a schematic structural view of a cross section B-B in FIG. 1;
FIG. 4 is a schematic structural view of the cross-section C-C of FIG. 1;
Fig. 5 is a flow chart of a roadbed frost heaving prevention method provided by the embodiment of the invention.
In the figure: 1. an end cap; 2. a first joint; 3. an evaporable getter; 4. a vacuum tail nozzle; 5. a light-transmitting tube; 6. a vacuum chamber; 7. a photothermal conversion tube; 8. a first case; 9. a reducing-type threaded connector; 10. a heat dissipating fin; 11. a radiating pipe; 12. a support; 13. a conical guide cap; 14. a second case; 15. a second joint; 16. an anti-reflection film; 17. a selective absorption membrane; 18. a first heat transfer medium; 19. a second heat transfer medium; 20. steel wire mesh; 21. a wick.
Detailed Description
in the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical solution of the present invention, the following description is made by using specific examples.
As shown in fig. 1, the heat pipe type solar thermal apparatus for road bed frost heaving includes a solar vacuum heat collecting assembly for converting solar energy into thermal energy, a heat dissipating assembly for transferring heat, and a liquid core heat pipe assembly for facilitating heat transfer from the solar vacuum heat collecting assembly to the heat dissipating assembly; the solar vacuum heat collection assembly comprises a photo-thermal conversion tube 7, a light transmission tube 5 is sleeved outside the photo-thermal conversion tube 7, the axis of the photo-thermal conversion tube 7 is overlapped with the axis of the light transmission tube 5, a vacuum cavity 6 is arranged between the photo-thermal conversion tube 7 and the light transmission tube 5, the two ends of the photo-thermal conversion tube 7 and the two ends of the light transmission tube 5 are in sealing connection, the two ends of the photo-thermal conversion tube 7 are respectively connected with a first joint 2 and a second joint 15, and an end cover 1 is arranged on the first joint 2 to seal one end of the photo-thermal conversion tube 7; the radiating assembly comprises a radiating pipe 11, one end of the radiating pipe 11 is connected with a second joint 15 and is communicated with the photothermal conversion pipe 7, the other end of the radiating pipe 11 is provided with a conical guide cap 13, the interior of the photothermal conversion pipe 7 and the interior of the radiating pipe 11 are filled with a first heat transfer medium 18, and the outer wall of the radiating pipe 11 is provided with radiating fins 10; the liquid core type heat pipe assembly comprises a first pipe shell 8 and a second pipe shell 14, wherein the first pipe shell 8 is located inside the photothermal conversion pipe 7, the second pipe shell 14 is fixed inside the radiating pipe 11 through a support 12, one end of the first pipe shell 8 is connected with one end of the second pipe shell 14 through a sealing piece, the first pipe shell 8 is conducted with the second pipe shell 14, the other end of the first pipe shell 8 is sealed, the other end of the second pipe shell 14 is sealed, and a second heat transfer medium 19 is poured into the first pipe shell 8 and the second pipe shell 14.
During the use, insert the heat dissipation subassembly underground of presetting the point, light and heat conversion pipe 7 among the solar energy vacuum heat collection subassembly utilizes solar energy to produce the heat to transmit heat to the heat dissipation subassembly through first heat transfer medium 18, the heat dissipation subassembly disperses the heat to the soil body, makes the soil body around the device heat up. Meanwhile, the photothermal conversion tube 7 generates heat, the heat is transferred to the first tube shell 8 through the first heat transfer medium 18, then the heat is transferred to the second tube shell 14 through the second heat transfer medium 19, and the second tube shell 14 is transferred to the heat dissipation assembly through the first heat transfer medium 18, so that the soil around the device is heated.
The utility model discloses an in the embodiment, light and heat conversion pipe 7 has plated the tubular metal resonator of selective absorption membrane 17 for the outer wall, and light and heat conversion pipe 7 can absorb solar energy and produce the heat, and the tubular metal resonator outer wall has plated selective absorption membrane 17 and can strengthen the ability of absorbing solar energy, improves the heat generating efficiency.
the utility model discloses an embodiment, light transmission pipe 5 is the glass pipe that the outer wall plated with antireflection coating 16, and the glass pipe is formed for borosilicate glass preparation, and antireflection coating 16 increases the transmitted light through the interference principle of light, and the collection volume is searched for to the solar radiation energy of increase light and heat conversion pipe 7.
In one embodiment of the present invention, the first joint 2 and the second joint 15 are deformation compensators, each of which includes an inner sleeve and an outer sleeve that can move relatively in the axial direction, the inner sleeve is connected to the light-heat conversion tube 7, and the outer sleeve is connected to the light transmission tube 5. The photothermal conversion tube 7 is made of metal, the light transmission tube 5 is made of glass, and the temperature expansion coefficient of the metal is larger than that of the glass; meanwhile, the photothermal conversion tube 7 operates at a higher temperature than the light transmission tube 5, and thus the photothermal conversion tube 7 has a larger thermal expansion deformation than the light transmission tube 5. In order to ensure that the solar vacuum heat collection component and the heat collection component work cooperatively without deformation and damage caused by mutual influence, the sleeve type deformation compensator is adopted for sealing connection so as to ensure that the medium in the solar vacuum heat collection component does not leak.
The inner sleeve of the sleeve type deformation compensator adopts a self-pressing type sealing structure, can freely slide in the light transmission tube 5 along with the extension and retraction of the photothermal conversion tube 7, and always keeps the space between the photothermal conversion tube 7 and the light transmission tube 5 in a sealing state.
The sealed space between the photothermal conversion tube 7 and the light transmission tube 5 is a vacuum cavity 6 with high vacuum degree, and the sealed space has the function of reducing the heat generated by the photothermal conversion tube 7 to be dissipated to the surrounding environment, so that the heat collection efficiency of the solar vacuum heat collection assembly is improved.
In one embodiment of the present invention, the internal conduction space of the first tube shell 8 and the second tube shell 14 is a negative pressure environment with a certain fixed vacuum degree. The second heat transfer medium 19 is gasified only when the heat collection temperature of the solar vacuum heat collection assembly reaches a certain fixed value or more, and then gas-liquid two-phase circulation heat transfer is performed, so that the one-way heat transfer direction of the solar vacuum heat collection assembly to the roadbed heat dissipation assembly is ensured, and the adverse phenomenon of roadbed heat loss caused by reverse heat flow is prevented.
In one embodiment of the present invention, the light transmission tube 5 is provided with a vacuum tail nozzle 4 for sealing after the vacuum chamber 6 is pumped to the designed vacuum degree. The vacuum chamber 6 is provided with an evaporable getter 3, for example, the evaporable getter 3 is attached to the wall surface of the sleeve type deformation compensator, and the evaporable getter 3 absorbs a trace amount of gas released from the vacuum chamber 6 to maintain the vacuum degree.
in an embodiment of the present invention, the end cap 1 disposed on the first joint 2 seals one end of the light-heat conversion tube 7, and the end cap 1 is an end cap with internal thread, made of stainless steel or brass, and used for opening and sealing the inner space of the light-heat conversion tube 7.
in one embodiment of the present invention, the conical guiding cap 13 is a conical solid metal body made of carbon steel, and has the advantages of high strength and high rigidity. The heat dissipating fins 10 are circular metal sheets made of aluminum.
the utility model discloses an in the embodiment, the one end of cooling tube 11 is passed through reducing type threaded connector 9 and is connected with second joint 15, and reducing type threaded connector 9 is equipped with the different screwed pipe of two internal diameters, and a screwed pipe of reducing type threaded connector 9 is connected to the one end of cooling tube 11, and second joint 15 connects another screwed pipe of reducing type threaded connector 9. Thereby connecting the photothermal conversion tube 7 and the internal space of the radiating pipe 11 as a single communicating body. The reducing threaded connector 9 is made of alloy steel and has the advantages of high strength and good ductility.
In one embodiment of the present invention, the first heat transfer medium 18 may be heat transfer oil.
In one embodiment of the present invention, the first tube case 8 and the second tube case 14 are metal tubes having a certain diameter and length, and made of copper, aluminum or stainless steel. The second heat transfer medium 19 is a low boiling point, volatile chemical liquid. The sealing member is used for separating the cold air flow and the hot air flow of the first tube shell 8 and the second tube shell 14, and the high-efficiency heat transfer is ensured.
The utility model discloses an in the embodiment, the inner wall of first tube 8 and the inner wall of second tube 14 are equipped with imbibition core 21, and imbibition core 21 hugs closely at the inner wall of first tube 8 and the inner wall of second tube 14 through wire net 20.
The wick 21 is a capillary porous material that functions to transport the liquid second heat transfer medium 19 in the second enclosure 14 back into the first enclosure 8 by capillary force.
the bracket 12 is used to firmly fix the liquid core type heat pipe assembly in the communicating space inside the photothermal conversion tube 7 and the radiating tube 11, and is immersed in the high temperature conduction oil to transfer heat.
As shown in fig. 5, an embodiment of the present invention provides a roadbed frost heaving prevention method, including:
Step S501, determining the maximum freezing depth of the subgrade with frost heaving diseases in the seasonal frozen soil area.
Temperature monitoring holes and deformation monitoring holes are distributed at frost heaving disease positions, the movement rule of the freezing front in the roadbed is determined through long-term monitoring data, and the maximum depth of the freezing front, namely the maximum development depth of the frost heaving disease, is determined.
And step S502, calculating the heat supply amount and the heat load required by preventing and controlling the frost heaving roadbed.
The method comprises the steps of firstly measuring the volume heat capacity of a frozen stratum filler and the freezing point temperature of water in soil, then calculating the heat supply amount required when a roadbed is raised to be above the freezing point temperature from the actual temperature during the frozen expansion based on a heat storage theory according to the lowest temperature when the frozen expansion occurs, and calculating the heat load of the frozen stratum on each linear meter during the frozen expansion.
Step S503, determining the heat supply capacity of the heat pipe type solar thermal device aiming at the frost heaving of the roadbed.
According to the seasonal change rule of regional solar energy flux density and the solar energy photo-thermal conversion efficiency, the maximum and average heat supply temperatures of the heat pipe type solar energy thermal device and the corresponding effective heat supply radius are comprehensively determined.
and step S504, determining the geometric type and the layout scheme of the heat pipe type solar thermal device aiming at the frost heaving of the roadbed.
According to the roadbed heat load level and the effective heat supply radius of the heat pipe type solar heat device, the arrangement position of the heat pipe type solar heat device on the roadbed cross section is determined, wherein the arrangement position comprises a roadbed shoulder, a roadbed side slope middle part or a roadbed slope foot part and an arrangement interval in the roadbed longitudinal direction, and the value range of the arrangement interval is 2.0-4.0 m. And then according to the roadbed heat load level and the device layout interval, determining the heat supply amount required by the device, and accordingly determining the geometric dimension of the device, wherein the geometric dimension comprises the pipe diameter and the length of the photothermal conversion pipe, namely the heat collection area, and the pipe diameter and the length of the radiating pipe, namely the heat radiation area, and the value range of the pipe diameter is 110-150 mm. Meanwhile, the geometric dimension of the device and the layout spacing are coordinated to ensure that the geometric dimension of the device and the layout spacing is not too large.
And step S505, manufacturing a heat pipe type solar-thermal device aiming at roadbed frost heaving.
And S506, drilling the roadbed, and installing a heat pipe type solar thermal device aiming at frost heaving of the roadbed.
Constructing in a frost heaving road section by adopting a drilling machine, drilling and digging holes with designed inclination and length, wherein the deviation rate of the drilled holes is less than 0.5 percent, and controlling and detecting the quality of the drilled holes by adopting a gyro inclinometer at any time in the drilling process; hoisting the device into the pre-drilled hole by using a crane, and then backfilling a gap between the device and the hole by using a high heat conduction material to be compact; and after the device is installed and is checked on site without errors, the device is put into operation.
The utility model has the advantages that:
(1) Compared with the existing measures of improving the soil quality of the roadbed filling, controlling the moisture, passively preserving the heat and the like, the device can start from the angle of the temperature of the roadbed and regulate and control the temperature change of the roadbed more actively. In particular, the heat can be collected, converted and transferred all the year round under the condition of solar radiation, and compared with the heat balance state of the roadbed under the natural condition, the heat input quantity of the roadbed can be actively increased, thereby increasing the average temperature level of the roadbed all the year round. On one hand, the heat input is greatly increased by utilizing the high radiation amount condition in summer, so that the temperature level of the roadbed in winter is improved, and the frost heaving resistance is improved. On the other hand, under the condition of good solar radiation condition in winter, heat can be input in real time to compensate the excessive heat loss of the roadbed, so that the roadbed temperature is comprehensively kept above the freezing point temperature, and the frost heaving phenomenon can be eliminated. Compared with the existing frost heaving prevention measures, the device can further prevent frost heaving.
(2) The anti-frost-heaving effect of the device is solar energy which is renewable heat energy with the most extensive distribution and the most abundant reserves. The subgrade with frost heaving diseases is generally located in northern high-latitude and high-altitude areas, and the areas are the areas with abundant solar energy distribution, so that the solar energy has resource conditions on regional distribution for the subgrade frost heaving problem. Meanwhile, the roadbed project is generally positioned at a position where the terrain is relatively flat, the sun irradiation condition is good, and the roadbed project is convenient to take.
(3) The device can autonomously realize a series of working procedures of photo-thermal conversion, heat storage, roadbed heat supply and the like of solar radiation energy, and is a self-integrated and self-driven complete heat supply device. Especially, the device practicality degree is high, and the artificial demand of controlling is low, and unmanned on duty that can be long-time is fit for using in the abominable, inconvenient long distance road bed engineering of artifical guard on duty of environment.
(4) The device is simple in component composition and form, compact in structure, high in overall strength and good in stability, and is suitable for being applied to roadbed vibration working conditions. On the other hand, the functional components are in a vertical column shape, and design schemes such as arrangement positions, intervals, angles, geometric dimensions and the like can be flexibly adjusted. In particular, the point type distribution scheme which is convenient for long-distance continuous distribution is suitable for roadbed dispersion and large-depth frost heaving distribution characteristics.
(5) The second heat transfer medium with a gas-liquid two-phase circulation function is filled in the liquid core type heat pipe assembly adopted by the device, and the solar heat energy collected by the solar vacuum heat collection assembly can be efficiently and quickly transferred to the roadbed heat dissipation assembly by combining the first heat transfer medium with static heat conduction. The device has the advantages of high starting speed of the heat supply function, fixed heat supply starting temperature and one-way heat transfer performance, and better heat supply function and anti-frost-heaving effect.
The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (9)
1. A heat pipe type solar thermal device aiming at roadbed frost heaving is characterized by comprising a solar vacuum heat collection component for converting solar energy into heat energy, a heat dissipation component for transferring heat and a liquid core type heat pipe component for promoting the heat to be transferred from the solar vacuum heat collection component to the heat dissipation component;
The solar vacuum heat collection assembly comprises a photo-thermal conversion tube, a light transmission tube is sleeved outside the photo-thermal conversion tube, the axis of the photo-thermal conversion tube is superposed with the axis of the light transmission tube, a vacuum cavity is formed between the photo-thermal conversion tube and the light transmission tube, the two ends of the photo-thermal conversion tube are hermetically connected, the two ends of the photo-thermal conversion tube are respectively connected with a first joint and a second joint, and an end cover is arranged on the first joint to seal one end of the photo-thermal conversion tube;
The heat dissipation assembly comprises a heat dissipation tube, one end of the heat dissipation tube is connected with the second joint and is communicated with the photo-thermal conversion tube, the other end of the heat dissipation tube is provided with a conical guide cap, a first heat transfer medium is filled in the photo-thermal conversion tube and the heat dissipation tube, and the outer wall of the heat dissipation tube is provided with heat dissipation fins;
The liquid core type heat pipe assembly comprises a first pipe shell and a second pipe shell, wherein the first pipe shell is located inside the photothermal conversion pipe, the second pipe shell is fixed inside the radiating pipe through a support, one end of the first pipe shell is connected with one end of the second pipe shell through a sealing piece, the first pipe shell is communicated with the inside of the second pipe shell, the other end of the first pipe shell is sealed, the other end of the second pipe shell is sealed, and a second heat transfer medium is poured into the first pipe shell and the inside of the second pipe shell.
2. The heat pipe type solar thermal apparatus for subgrade frost heaving according to claim 1, wherein the inner wall of the first pipe case and the inner wall of the second pipe case are provided with wicks.
3. The heat pipe type solar thermal apparatus for roadbed frost heaving of claim 2, wherein the liquid absorption core is tightly attached to the inner wall of the first pipe shell and the inner wall of the second pipe shell through a steel wire mesh.
4. The heat pipe type solar thermal apparatus for subgrade frost heaving according to claim 1, wherein the photothermal conversion pipe is a metal pipe coated with a solar selective absorption film on the outer wall.
5. The heat pipe type solar thermal apparatus for subgrade frost heaving according to claim 1, wherein the light transmission pipe is a glass pipe coated with an anti-reflection film on the outer wall.
6. The heat pipe type solar thermal apparatus for road bed frost heaving as claimed in claim 1, wherein the first joint and the second joint are deformation compensators, the deformation compensators comprise an inner sleeve and an outer sleeve which can move relatively in an axial direction, the inner sleeve is connected with the photothermal conversion pipe, and the outer sleeve is connected with the light transmission pipe.
7. The heat pipe type solar thermal apparatus for roadbed frost heaving of claim 1, wherein the internal conduction space of the first and second pipe shells is a negative pressure environment.
8. the heat pipe type solar thermal apparatus for roadbed frost heaving of claim 1, wherein an evaporable getter is arranged in the vacuum chamber.
9. The heat pipe type solar thermal apparatus for road bed frost heaving as claimed in claim 1, wherein one end of the heat pipe is connected to the second joint through a different diameter type threaded connector, the different diameter type threaded connector is provided with two threaded pipes having different inner diameters, one end of the heat pipe is connected to one threaded pipe of the different diameter type threaded connector, and the second joint is connected to the other threaded pipe of the different diameter type threaded connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920106718.7U CN209798463U (en) | 2019-01-22 | 2019-01-22 | Heat pipe type solar thermal device for roadbed frost heaving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920106718.7U CN209798463U (en) | 2019-01-22 | 2019-01-22 | Heat pipe type solar thermal device for roadbed frost heaving |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209798463U true CN209798463U (en) | 2019-12-17 |
Family
ID=68820648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920106718.7U Expired - Fee Related CN209798463U (en) | 2019-01-22 | 2019-01-22 | Heat pipe type solar thermal device for roadbed frost heaving |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209798463U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109577126A (en) * | 2019-01-22 | 2019-04-05 | 石家庄铁道大学 | Pipe type solar heat photo-thermal device and roadbed anti-freeze expansion method for roadbed frost damage |
-
2019
- 2019-01-22 CN CN201920106718.7U patent/CN209798463U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109577126A (en) * | 2019-01-22 | 2019-04-05 | 石家庄铁道大学 | Pipe type solar heat photo-thermal device and roadbed anti-freeze expansion method for roadbed frost damage |
| CN109577126B (en) * | 2019-01-22 | 2023-10-20 | 石家庄铁道大学 | Heat pipe type solar thermal device for frost heaving of roadbed and frost heaving prevention method of roadbed |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109577126B (en) | Heat pipe type solar thermal device for frost heaving of roadbed and frost heaving prevention method of roadbed | |
| FI94985C (en) | Heat accumulator, method of using the heat accumulator and use of the heat accumulator | |
| CN101787692B (en) | Method for maintaining thermal stability of permafrost foundation and complete solar refrigeration device | |
| CN208201567U (en) | Passive geothermal snow melt deicing device | |
| WO2018014604A1 (en) | Cast-in-place pile apparatus for combined cooling, heat and power generation and construction method therefor | |
| CN110761317B (en) | Iron tower installation method for frozen soil | |
| CN108224804A (en) | Towards the solar energy heat collector and implementation of seasonal frozen soil region subgrade engineering | |
| CN107782014B (en) | Solar adsorption type refrigerating device and method for permafrost region roadbed engineering | |
| CN103531652A (en) | Cooling device for dish-type solar concentrating photovoltaic cell panel | |
| WO2018014609A1 (en) | Jet grouting soil-cement-pile strengthened pile system for combined cooling, heat and power generation and construction method therefor | |
| CN104514218A (en) | Energy pile and system thereof | |
| CN209798463U (en) | Heat pipe type solar thermal device for roadbed frost heaving | |
| CN109440559A (en) | Roadbed internal-circulation type solar-heating device and roadbed anti-freeze expansion method | |
| CN109853518B (en) | Solar jet type refrigerating device suitable for frozen soil area and frozen soil protection method | |
| CN208124654U (en) | Solar energy heat collector towards seasonal frozen soil region subgrade engineering | |
| CN111074874A (en) | Can realize remote monitoring's high-efficient hot stick | |
| CN209384051U (en) | Roadbed internal-circulation type solar-heating device | |
| CN110029677A (en) | Ever-frozen ground side slope sunshade refrigeration anchor structure and construction method | |
| CN115467206A (en) | Anti-frost-heaving roadbed system and roadbed heat supply method | |
| CN205156703U (en) | Xeothermic rock heat exchanger of heat pipe formula | |
| CN215176126U (en) | Auxiliary device for deep well heat exchange technology | |
| CN113047105A (en) | Integrated anti-freezing and anti-expansion heat collecting device and roadbed thereof | |
| CN113339873A (en) | Novel cold-proof and anti-freezing system and method for cold-region high-ground-temperature tunnel | |
| CN104746410A (en) | Automatic land surface temperature regulating system | |
| CN105040744A (en) | Thermal insulation device of foundation under plateau frozen earth condition and construction method of thermal insulation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191217 Termination date: 20210122 |