CN114438994B - Temperature control device for frozen soil foundation - Google Patents
Temperature control device for frozen soil foundation Download PDFInfo
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- CN114438994B CN114438994B CN202210106171.7A CN202210106171A CN114438994B CN 114438994 B CN114438994 B CN 114438994B CN 202210106171 A CN202210106171 A CN 202210106171A CN 114438994 B CN114438994 B CN 114438994B
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- 239000002689 soil Substances 0.000 title claims abstract description 89
- 238000001816 cooling Methods 0.000 claims abstract description 26
- 239000003507 refrigerant Substances 0.000 claims description 41
- 230000005494 condensation Effects 0.000 claims description 21
- 238000009833 condensation Methods 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 14
- 239000004065 semiconductor Substances 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 12
- 238000001704 evaporation Methods 0.000 claims description 11
- 230000008020 evaporation Effects 0.000 claims description 10
- 238000005192 partition Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 4
- 230000017525 heat dissipation Effects 0.000 claims description 2
- 230000009471 action Effects 0.000 abstract description 9
- 230000000750 progressive effect Effects 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 15
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 229910021529 ammonia Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 238000010257 thawing Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
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- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 1
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/11—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means
- E02D3/115—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means by freezing
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/35—Foundations formed in frozen ground, e.g. in permafrost soil
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Building Environments (AREA)
Abstract
The invention relates to the technical field of frozen soil foundation engineering, in particular to a temperature control device for a frozen soil foundation, which comprises a temperature control device for cooling or preserving the temperature inside the frozen soil foundation and a convection cooling device for cooling the surface of the frozen soil foundation, wherein the temperature control device is characterized in that the temperature control device is of a structure capable of being regulated and controlled automatically, the frozen soil foundation is thawed down when the temperature is high, and the frozen soil foundation is frozen and swelled when the temperature is extremely low; the temperature control device comprises an upper temperature control loop and a lower temperature control loop, and heat in the frozen soil foundation is exchanged to the outside in a progressive manner during working; when the external temperature is too low and reaches the set temperature in extreme weather, the upper temperature control loop stops working, the heat release section of the lower temperature control loop is changed to the active layer of the frozen soil foundation, and heat release is carried out on the active layer of the frozen soil foundation; the temperature control device for the frozen soil foundation solves the problems that a temperature control device for the frozen soil foundation in the prior art is single in action and cannot adapt to the complex situation of conversion between a permanently frozen layer and an active layer of the frozen soil foundation under extreme climate conditions.
Description
Technical Field
The invention relates to the technical field of frozen soil foundation engineering, in particular to a temperature control device for a frozen soil foundation.
Background
Frozen soil refers to various rocks and soils containing ice at a temperature below zero degrees celsius. Generally, it can be classified into season frozen soil and permafrost soil. According to investigation and research of frozen earthists in China, the area of frozen soil in China (including perennial frozen soil and seasonal frozen soil with the frozen depth of more than 0.5 m) is up to 658 ten thousand square kilometers, and the area of the frozen soil in China accounts for 68.6 percent of the area of the national soil in China.
Frozen soil has rheological property and long-term strength far lower than instantaneous strength. Thus, construction of engineering structures in frozen soil areas must be faced with two major risks: frost heaving and thawing. The frozen soil foundation comprises a permafrost layer and an active layer, however, as global climate is warmed, extreme weather climate events are frequent, especially extreme high-temperature and extreme low-temperature weather climate, the original permafrost layer of the frozen soil foundation can be partially converted into the active layer at the extreme high temperature, and the original active layer can be converted into the permafrost layer at the extreme low temperature, so that potential safety hazards are caused to the stability of the frozen soil foundation.
The temperature control device for the frozen soil foundation in the prior art is mainly used for preventing the active layer of the frozen soil foundation from melting when the surface temperature of the earth is high in summer and is used for cooling; or preventing the active layer of the frozen soil foundation from frost heaving when the surface temperature of the ground is low in winter, and heating; the effect is single, and the complex situation of the transformation between the permafrost layer and the movable layer of the frozen soil foundation under extreme climate conditions cannot be adapted; meanwhile, the technology of reducing the ground temperature by air convection in the prior art, such as the pavement of broken stones and rubble effect, is not ideal and the convection heat exchange effect is easily lost due to the coverage of wind sand or snow.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides a temperature control device for a frozen soil foundation, which solves the problems that the temperature control device for the frozen soil foundation or the temperature reduction or the temperature increase in the prior art has single action and cannot adapt to the complex situation of the transformation between a permanently frozen layer and an active layer of the frozen soil foundation under extreme climate conditions.
The technical proposal is as follows:
the temperature control device for the frozen soil foundation comprises a temperature control device, wherein the temperature control device comprises a disc-shaped condenser which is configured to be fixedly buried on the surface of a frozen soil active layer, the disc-shaped condenser is provided with a cavity, and a first refrigerant is arranged in the cavity; the disc-shaped condenser is characterized in that an annular tube communicated with the disc-shaped condenser is fixedly connected to the axis of the disc-shaped condenser, a partition plate is arranged in the annular tube, and a gap is reserved between the partition plate and the bottom of the annular tube to form a circulation loop of a first refrigerant; a compressor and a throttle valve are arranged in the condenser, and the compressor is communicated with the annular pipe through a pipeline; the throttle valve is fixedly connected to the connecting channel of the condenser and the annular pipe;
a semiconductor refrigerator is arranged at one end, close to the disc-shaped condenser, in the annular pipe; the temperature control device further comprises a cylindrical pipe which is configured to be fixedly connected to the bottom of the annular pipe, a second refrigerant is arranged in the cylindrical pipe, and a liquid suction core is arranged in the cylindrical pipe to form a circulation loop of the second refrigerant; the cylindrical tube comprises an evaporation section and a condensation section, the condensation section is embedded in the annular tube, one end of the condensation section, which is far away from the evaporation section, is provided with a hemispherical rubber contact relatively, a structure is formed that the rubber contact deforms under the change of temperature to open and close the condensation section, and a contact system is arranged in the rubber contact and is electrically connected with the semiconductor refrigerator;
the device is characterized by further comprising a convection cooling device which is configured to be rotationally connected to the axis of the disc-shaped condenser, wherein the convection cooling device comprises an impeller, the impeller is rotationally connected to the axis of the disc-shaped condenser through a rotating shaft, a wind cup component is fixedly connected to the top of the rotating shaft, the wind cup component is formed to rotationally drive the impeller to rotate, and air above the impeller forms a horizontal airflow structure after passing through the impeller.
Preferably, a fin group for radiating heat is fixedly connected to one side, far away from the ground, of the disc-shaped condenser, the fin group comprises a plurality of fins which are of rectangular plate-shaped structures and distributed in a circumferential array, each fin is fixedly connected to the top of the disc-shaped condenser, and a gap for the first refrigerant to pass through is reserved between each fin and the bottom of the disc-shaped condenser.
Preferably, a spherical sealing cavity is formed in the rubber contact and is used for containing air, air with set pressure is filled in the sealing cavity to form a structure that the rubber contact contacts against the sealing cylindrical pipe, the volume of air in the sealing cavity is reduced after the rubber contact is cooled, and the rubber contact is deformed and separated to enable the cylindrical pipe to be communicated with the inner cavity of the annular pipe.
Preferably, the impeller comprises a front cover plate and a rear cover plate, wherein the front cover plate is provided with an air inlet, the opposite sides of the front cover plate and the rear cover plate are provided with blades which are arc-shaped and distributed in a circumferential array, two side surfaces of the length direction of the blades are respectively connected with the front cover plate and the rear cover plate into a whole, and a flow passage for air to pass through is formed between every two adjacent blades.
Preferably, the wind cup assembly comprises wind cups, each wind cup is of an oval hemispherical shell structure, four wind cups are arranged in a pairwise opposite mode, and each wind cup is fixedly connected to the top of the rotating shaft through a connecting part.
The beneficial effects of the invention are as follows:
1. the invention comprises a temperature control device for cooling or insulating the interior of the frozen soil foundation and a convection cooling device for cooling the earth surface of the frozen soil foundation, and has the beneficial effects of thawing and sinking the frozen soil foundation when the temperature is high and frost heaving the frozen soil foundation when the temperature is extremely low through a structure capable of being regulated and controlled independently.
2. The temperature control device comprises an upper temperature control loop and a lower temperature control loop, and exchanges heat in the frozen soil foundation to the outside in a progressive manner during working to cool or preserve heat of the frozen soil foundation; when the external temperature is too low and reaches the set temperature in extreme weather, the upper temperature control loop stops working, the heat release section of the lower temperature control loop is changed to the active layer of the frozen soil foundation, heat release is carried out on the active layer of the frozen soil foundation, and frost heaving diseases caused by further freezing of the active layer of the frozen soil foundation are prevented.
3. The convection cooling device changes the ground surface disordered air flow into regular horizontal air flow and diffuses the air flow to the periphery along the ground by using the centrifugal and air negative pressure principles, and has an effective cooling effect. Meanwhile, in seasons easy to form frost, heat released to the ground surface during frost formation is rapidly diffused into the air, the lower temperature of the ground surface is kept, and the frozen soil foundation is prevented from melting.
Drawings
Fig. 1 is a structural diagram of the present invention.
FIG. 2 is a block diagram of a temperature control device of the present invention.
Fig. 3 is a cross-sectional view of the annular tube of the present invention.
FIG. 4 is a block diagram of a convective heat sink of the present invention.
Fig. 5 is a perspective view of an impeller of the present invention.
Wherein: temperature control device 1, disc condenser 11, annular tube 12, baffle 121, cylindrical tube 13, evaporation section 131, condensation section 132, wick 133, rubber contact 134, semiconductor refrigerator 14, fin group 17, compressor 18, throttle valve 19, convection cooling device 2, impeller 21, front cover plate 211, rear cover plate 212, air inlet 213, blade 214, rotary shaft 22, cup assembly 23, and cup 231.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
A temperature control device for frozen soil foundation, including being used for frozen soil foundation inside cooling or heat retaining temperature control device 1 and be used for frozen soil foundation earth's surface cooling's convection cooling device 2, through the structure that can independently regulate and control, have the frozen soil foundation thawing when the temperature is high and sink, the frozen soil foundation frost heaving when the temperature is extremely low beneficial effect.
The temperature control device 1 comprises an upper temperature control loop and a lower temperature control loop, and each temperature control loop comprises a heat release section and a heat absorption section. The heat-release section is a condensing part of the refrigerant, and the refrigerant is condensed, liquefied and released in the heat-absorption section; the heat absorption section is an evaporation part of the refrigerant, and the refrigerant evaporates and absorbs heat in the heat release section; the heat release section of upper temperature control circuit buries in the active layer of frozen soil foundation, and the heat absorption section sets up in the earth's surface of frozen soil foundation, and the condensation section of lower temperature control circuit inlays and establishes in the heat absorption section of upper temperature control circuit, and the heat release section buries in the frozen layer of frozen soil foundation, and lower temperature control circuit is equipped with the passageway of controlling switching according to external temperature and upper temperature control circuit intercommunication, is equipped with the semiconductor refrigerator in the heat absorption section of upper temperature control circuit.
The method specifically comprises the following steps: the temperature control device 1 comprises a disc-shaped condenser 11 which is configured to be fixedly buried on the surface of a frozen soil active layer, and compared with a columnar structure and the like, the disc-shaped structure can effectively enlarge the refrigerating area, and meanwhile, based on the gradual freezing or thawing property of the frozen soil foundation from top to bottom and from the outside to the inside, the condenser with the disc-shaped structure can effectively form a heat shield for the frozen soil foundation and the outside atmosphere, so that the outside heat is difficult to exchange to the frozen soil foundation, and the frozen soil foundation is effectively prevented from thawing and sinking; meanwhile, the device has the function of storing the refrigerant. The disc-shaped condenser 11 is provided with a cavity for accommodating or circulating the refrigerant in the upper temperature control loop; the first refrigerant is arranged in the cavity, and comprises but is not limited to ammonia, freon-12 and other medium-temperature and medium-pressure refrigerants, and as a preferred embodiment, the first refrigerant is ammonia, the ammonia has good water absorption, and even water cannot be separated out from ammonia liquid and frozen at low temperature, so that the phenomenon of ice plug cannot occur in the system, and because the ammonia is in a position with good ventilation, the toxicity and the risk of explosiveness of the ammonia can be ignored, and meanwhile, the ammonia does not corrode steel, so that the system is economical and efficient. The annular tube 12 communicated with the disc-shaped condenser 11 is welded and fixed at the axis of the disc-shaped condenser 11, a partition plate 121 is arranged in the annular tube 12, a gap is reserved between the partition plate 121 and the bottom of the annular tube 12, the annular tube 12 is divided into two cavities with communicated bottoms, and a channel is formed at the contact position of each cavity and the disc-shaped condenser 11 and is communicated with the disc-shaped condenser 11 to form a circulation loop for a first refrigerant; the condenser 11 is internally provided with a compressor 18 and a throttle valve 19, the compressor 18 and the throttle valve 19 are in the prior art, the throttle valve 19 is an electronic throttle valve, the compressor 18 is communicated with the annular pipe 12 through a pipeline, and a first refrigerant in the annular pipe 12 enters the disc-shaped condenser 11 through the compressor 18; the throttle valve 19 is fixedly connected to the connecting channel of the condenser 11 and the annular pipe 12 through threads, and is installed in an adaptive manner according to the actual size.
When the device works, the disc-shaped condenser 11 is a heat release section, the annular pipe 12 is a heat absorption section, the compressor 18 sucks the gaseous first refrigerant with lower pressure in the annular pipe 12, the gaseous first refrigerant is sent into the disc-shaped condenser 11 after the pressure is increased, the gaseous first refrigerant is condensed into liquid with higher pressure in the disc-shaped condenser 11, and the heat is released when the steam is liquefied, so that the heat is converted to the outside; the liquid first refrigerant condensed in the disc condenser 11 and having a relatively low pressure is converted into a liquid state having a relatively high pressure by the throttle valve 19, and is sent into the annular pipe 12, and is converted into a gaseous state having a relatively low pressure by endothermic evaporation in the annular pipe 12, and is sucked into the compressor 18 to form a refrigeration cycle.
The temperature control device 1 further comprises a cylindrical tube 13, a second refrigerant is arranged in the cylindrical tube 13, the second refrigerant comprises common refrigerants such as freon and methanol, and the second refrigerant is methanol, and as a preferred embodiment, a liquid suction core 133 is arranged in the cylindrical tube 13, the liquid suction core 133 is of the prior art and is of a porous capillary structure, and the liquid suction core 133 is in close contact with and fixed with the inner wall of the cylindrical tube 13 and is used for forming a circulation loop of the second refrigerant.
The cylindrical tube 13 comprises an evaporation section 131 and a condensation section 132, wherein the diameter of the condensation section 132 is equal to the minimum inner diameter of the annular tube 12, and the condensation section is embedded in the annular tube 12. The cylindrical tube 13 is made of copper, and the metal copper has relatively good heat conduction performance and low manufacturing cost, and is beneficial to heat transfer. In order to further promote the heat exchange between the annular tube 12 and the cylindrical tube 13 and prevent the first refrigerant from corroding the cylindrical tube 13, a graphite layer or a graphene layer is plated on the outer surface of the condensation section 132 of the cylindrical tube 13, and graphite and graphene have ultrahigh heat conductivity, but due to higher manufacturing cost, the application only has a plating layer on the outer surface of the condensation section 132 of the cylindrical tube 13, and the cylindrical tube 13 can be made of graphite or graphene integrally. The cylindrical tube 13 is made of aluminum, and a graphite layer or a graphene layer is plated on the inner side of the cylindrical tube 13 to prevent the first refrigerant from being corroded. The cylindrical tube 13 is embedded in the annular tube 12 to form a sealing structure, and one end of the cylindrical tube 13, which is close to the annular tube 12, is welded with the bottom of the annular tube 12 into a whole.
During operation, the cylindrical tube 13 is pumped into a set negative pressure, the liquid suction core 133 is filled with a set amount of second refrigerant, the second refrigerant is evaporated and absorbed in the evaporation section 131 to be converted into a gaseous state, the gaseous state rises to the condensation section 132 and is condensed and released in the condensation section 132, the released heat is absorbed by the annular tube, the condensed second refrigerant is converted into a liquid state, the liquid suction core 133 absorbs the released heat, and the condensed second refrigerant flows back to the evaporation section 131 along a porous capillary structure thereof under the action of pressure, and is evaporated and absorbed again to form a refrigeration loop.
The absorbed heat of the annular tube 12 originates from the active layer of the frozen earth foundation and the heat released by the condensing section 132. And forming a process of exchanging heat in the frozen soil foundation from the permafrost layer to the active layer and then from the active layer to the surface outside.
In order to prevent frost heaving of the frozen soil foundation active layer under extreme cold conditions, a semiconductor refrigerator 14 is arranged at one end, close to the disc-shaped condenser 11, of the annular tube 12, and the semiconductor refrigerator 14 is in the prior art and is used for condensing the refrigerant; the condensing section 132 is provided with a hemispherical rubber contact 134 at one end far away from the evaporating section 131, and a contact system is disposed in the rubber contact 134 and electrically connected with the semiconductor refrigerator 14, so that the condensing section 132 is opened and closed by deformation of the rubber contact 134 under temperature change. The contact system is prior art.
When the outside is at a non-set limit low temperature, the rubber contact 134 is closed, the cylindrical tube 13 is sealed, the contact system control circuit is powered off, and the semiconductor refrigerator 14 does not work; when the outside is at the set limit low temperature, the rubber contact 134 is separated under the action of heat and cold shrinkage, the cylindrical tube 13 is communicated with the annular tube 12, the contact system control circuit is electrified, the semiconductor refrigerator 14 starts to work, and meanwhile, the circuits of the compressor 18 and the throttle valve 19 are disconnected to stop working, so that the upper temperature control loop is disabled and does not refrigerate; the heat release section of the lower temperature control loop is changed from the original condensing section 132 part to the part of the annular pipe 12, the lower temperature control loop converts the radiant heat of the permafrost layer from the earth center into the active layer, releases heat in the active layer, and prevents the active layer from continuing to freeze and causing frost heaving diseases.
To further reduce the ground temperature, a convection cooling device 2 is rotatably connected to the center of the disc-shaped condenser 11. The convection cooling device 2 comprises an impeller 21, the impeller 21 is rotationally connected to the axis of the disc-shaped condenser 11 through a rotating shaft 22, a hub is fixedly welded at the axis of the impeller 21, a bearing is rotationally connected to the end part of the rotating shaft 22, and the bearing is fixedly welded at the axis of the disc-shaped condenser 11; the top of the rotating shaft 22 is fixedly welded with a wind cup assembly 23, the wind cup assembly 23 rotates under the action of wind force, the impeller 21 is driven to rotate through the rotation of the wind cup assembly 23, negative pressure is formed at the axis when the impeller 21 rotates, so that air above the impeller 21 is sucked into the impeller 21, and then is discharged along the horizontal direction under the action of centrifugal force generated by the rotation of the impeller 21, so that air flow diffused along the horizontal direction is formed, heat of the disc-shaped condenser 11 and the ground surface is taken away, the ground surface temperature is reduced, and the frozen soil foundation is prevented from melting.
In the above or some embodiments, the power supply device further comprises a solar panel, wherein the solar panel is electrically connected with a storage battery, and the storage battery is electrically connected with each semiconductor refrigerator compressor to form the power supply device. The same solar power supply device can supply power to a plurality of semiconductor refrigerator compressors around the same solar power supply device.
When the device is used, holes are drilled on the frozen soil foundation or buried in the construction process, so that the upper temperature control loop and the lower temperature control loop are respectively positioned on the active layer and the permanent frozen layer of the frozen soil foundation, the opposite ends of the two rubber contacts 134 are mutually abutted under the condition of non-extreme cold air temperature, the closed state is achieved, and the upper temperature control loop and the lower temperature control loop work independently. At this time, the heat absorption section of the lower temperature control loop absorbs the heat of the heat absorption section of the lower temperature control loop under the circulation action of the second refrigerant, the heat of the heat forever layer of the frozen soil foundation forever layer is derived from the heat radiation of the earth center, the heat emission section of the lower temperature control loop cannot completely condense the second refrigerant, and the heat absorption section of the upper temperature control loop absorbs the heat of the heat emission section of the lower temperature control loop, so that the condensation heat emission is completed; meanwhile, under the circulation action of the first refrigerant, the heat absorption section of the upper temperature control loop absorbs heat released by the frozen soil foundation active layer and the heat release section of the lower temperature control loop, the heat release section of the upper temperature control loop completes condensation and heat release in the earth surface disc-shaped condenser 11, the progressive release of the heat in the frozen soil foundation from the permanently frozen layer to the active layer and from the active layer to the earth surface is realized, and meanwhile, the temperatures of the frozen soil foundation permanently frozen layer and the active layer are reduced, and melting and thawing are prevented.
In the above or some embodiments, the fin group 17 for heat dissipation is fixedly connected to a side, far away from the ground, of the disc-shaped condenser 11, where the fin group 17 includes a plurality of fins having a rectangular plate-shaped structure and distributed in a circumferential array, each fin is fixedly connected to the top of the disc-shaped condenser 11, and a gap for the first refrigerant 15 to pass through is reserved between each fin and the bottom of the disc-shaped condenser 11, so that the condensation efficiency of the disc-shaped condenser 11 is improved.
In the above or some embodiments, a spherical sealing cavity is provided in the rubber contact 134, for accommodating air, and the sealing cavity is filled with air with a set pressure, so that two rubber contacts 134 contact against the sealing cylindrical tube 13, the volume of air in the sealing cavity is reduced after the two rubber contacts 134 are cooled, and the two rubber contacts 134 deform and separate, so that the cylindrical tube 13 is communicated with the inner cavity of the annular tube (12). The rubber contact 134 is obviously deformed due to expansion caused by heat and contraction caused by cold, the gas expands due to heat and contracts due to cold, the effect is obvious, and the deformation of the auxiliary rubber contact 134 realizes the control of the position change of the heat release section in the application at the extreme low temperature.
In the foregoing or some embodiments, the impeller 21 includes a front cover plate 211 and a rear cover plate 212, the front cover plate 211 is provided with an air inlet 213, the opposite sides of the front cover plate 211 and the rear cover plate 212 are provided with blades 214 distributed in an arc shape and in a circumferential array, two longitudinal sides of the blades 214 are respectively connected with the front cover plate 211 and the rear cover plate 212 into a whole, and a flow passage for air passing is formed between adjacent blades 214. When the impeller 21 rotates, negative pressure is formed at the air inlet 213 under the action of centrifugal force, and the disordered air flow is changed into regular horizontal air flow and is diffused around the impeller 21 along the ground, so that a good cooling effect is achieved. Meanwhile, in seasons easy to form frost, heat released to the ground surface during frost formation is rapidly diffused into the air, the lower temperature of the ground surface is kept, and the frozen soil foundation is prevented from melting.
In the above or some embodiments, the wind cup assembly 23 includes wind cups 231, the wind cups 231 have an oval hemispherical shell structure, the wind cups 231 are disposed in pairs, and each wind cup 231 is fixedly connected to the top of the rotating shaft 22 through a connecting component. The arrangement of the wind cup with the oval hemispherical shell structure has a good wind resistance increasing effect, and improves larger wind energy power for the rotation of the wind cup assembly 23.
The working principle of the invention is as follows:
the invention comprises a temperature control device 1 for cooling or insulating the interior of a frozen soil foundation and a convection cooling device 2 for cooling the earth surface of the frozen soil foundation.
The temperature control device 1 comprises an upper temperature control loop and a lower temperature control loop: the heat release section of the upper temperature control loop is embedded in the movable layer of the frozen soil foundation, the heat absorption section is arranged on the ground surface of the frozen soil foundation, the condensation section of the lower temperature control loop is embedded in the heat absorption section of the upper temperature control loop, the heat release section is embedded in the permanently frozen layer of the frozen soil foundation, and heat in the frozen soil foundation is exchanged to the outside in a progressive manner during operation, so that the frozen soil foundation is cooled or insulated;
the lower temperature control loop is provided with a channel which is controlled to be opened and closed according to the external temperature and is communicated with the upper temperature control loop, a semiconductor refrigerator is arranged in the heat absorption section of the upper temperature control loop, when the external temperature is too low and reaches a set temperature, the upper temperature control loop stops working, the heat release section of the lower temperature control loop is changed to the active layer of the frozen soil foundation, heat release is carried out on the active layer of the frozen soil foundation, and frost heaving diseases are prevented from being generated by further freezing of the active layer of the frozen soil foundation.
The convection cooling device 2 changes the ground surface disordered air flow into regular horizontal air flow and diffuses the air flow to the periphery along the ground by using a center through the centrifugation and air negative pressure principle, and has an effective cooling effect. Meanwhile, in seasons easy to form frost, heat released to the ground surface during frost formation is rapidly diffused into the air, the lower temperature of the ground surface is kept, and the frozen soil foundation is prevented from melting.
The present invention has been described in detail by way of specific embodiments and examples, but these should not be construed as limiting the invention. Many variations and modifications may be made by one skilled in the art without departing from the principles of the invention, which is also considered to be within the scope of the invention.
Claims (5)
1. A temperature control device for frozen soil ground, its characterized in that:
the device comprises a temperature control device (1), wherein the temperature control device (1) comprises a disc-shaped condenser (11) which is configured to be fixedly buried on the surface of a frozen soil active layer, the disc-shaped condenser (11) is provided with a cavity, and a first refrigerant (15) is arranged in the cavity; the disc-shaped condenser (11) is fixedly connected with an annular pipe (12) communicated with the disc-shaped condenser, a partition plate (121) is arranged in the annular pipe (12), and a gap is reserved between the partition plate (121) and the bottom of the annular pipe (12) to form a circulation loop of a first refrigerant (15); a compressor (18) and a throttle valve (19) are arranged in the disc-shaped condenser (11), and the compressor (18) is communicated with the annular pipe (12) through a pipeline; the throttle valve (19) is fixedly connected to a connecting channel of the disc-shaped condenser (11) and the annular pipe (12);
a semiconductor refrigerator (14) is arranged at one end, close to the disc-shaped condenser (11), in the annular pipe (12); the temperature control device (1) further comprises a cylindrical pipe (13) which is configured to be fixedly connected to the bottom of the annular pipe (12), a second refrigerant (16) is arranged in the cylindrical pipe (13), and a liquid suction core (133) is arranged in the cylindrical pipe (13) to form a circulation loop of the second refrigerant (16); the cylindrical tube (13) comprises an evaporation section (131) and a condensation section (132), the condensation section (132) is embedded in the annular tube (12), one end of the condensation section (132) far away from the evaporation section (131) is provided with a hemispherical rubber contact (134) relatively, a structure is formed that the rubber contact (134) deforms under the change of temperature to enable the condensation section (132) to be opened and closed, and a contact system is arranged in the rubber contact (134) and is electrically connected with the semiconductor refrigerator (14);
the air cooling device is characterized by further comprising a convection cooling device (2) which is configured to be rotationally connected to the axis of the disc-shaped condenser (11), wherein the convection cooling device (2) comprises an impeller (21), the impeller (21) is rotationally connected to the axis of the disc-shaped condenser (11) through a rotating shaft (22), a wind cup assembly (23) is fixedly connected to the top of the rotating shaft (22), the wind cup assembly (23) is formed to rotationally drive the impeller (21) to rotate, and air above the impeller (21) forms a horizontal airflow structure after passing through the impeller (21).
2. The temperature control device for frozen soil foundations of claim 1, wherein:
the heat dissipation device is characterized in that a fin group (17) for dissipating heat is fixedly connected to one side, far away from the ground, of the disc-shaped condenser (11), the fin group (17) comprises a plurality of fins which are of rectangular plate-shaped structures and distributed in a circumferential array, each fin is fixedly connected to the top of the disc-shaped condenser (11), and a gap for a first refrigerant (15) to pass through is reserved between each fin and the bottom of the disc-shaped condenser (11).
3. The temperature control device for frozen soil foundations of claim 1, wherein:
the sealing device is characterized in that a spherical sealing cavity is formed in the rubber contact (134) and is used for containing air, air with set pressure is filled in the sealing cavity, two rubber contacts (134) are abutted against the sealing cylindrical pipe (13), the volume of air in the sealing cavity is reduced after the rubber contact (134) is cooled, and the two rubber contacts (134) deform and separate, so that the cylindrical pipe (13) is communicated with the inner cavity of the annular pipe (12).
4. The temperature control device for frozen soil foundations of claim 1, wherein:
impeller (21) are including preceding apron (211) and back shroud (212), preceding apron (211) are equipped with air inlet (213), preceding apron (211) with back shroud (212) opposite side is equipped with arc and is blade (214) that circumference array distributes, the both sides face of blade (214) length direction is connected as an organic wholely with preceding apron (211) and back shroud (212) respectively, adjacent form the runner that is used for the air to pass through between blade (214).
5. The temperature control device for frozen soil foundations of claim 1, wherein:
the wind cup assembly (23) comprises wind cups (231), each wind cup (231) is of an oval hemispherical shell structure, four wind cups (231) are arranged in a pair-by-pair mode, and each wind cup (231) is fixedly connected to the top of the rotating shaft (22) through a connecting component.
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| CN202210106171.7A CN114438994B (en) | 2022-01-28 | 2022-01-28 | Temperature control device for frozen soil foundation |
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| CN202210106171.7A CN114438994B (en) | 2022-01-28 | 2022-01-28 | Temperature control device for frozen soil foundation |
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| CN114438994A (en) | 2022-05-06 |
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