CN114438994A - Temperature control device for frozen soil foundation - Google Patents
Temperature control device for frozen soil foundation Download PDFInfo
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- CN114438994A CN114438994A CN202210106171.7A CN202210106171A CN114438994A CN 114438994 A CN114438994 A CN 114438994A CN 202210106171 A CN202210106171 A CN 202210106171A CN 114438994 A CN114438994 A CN 114438994A
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- 239000002689 soil Substances 0.000 title claims abstract description 80
- 239000003507 refrigerant Substances 0.000 claims description 40
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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 can be automatically regulated and controlled, so that the frozen soil foundation is thawed when the temperature is high, and the frozen soil foundation is frozen 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 mode during working; when the external temperature is too low and reaches a 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 is released in the active layer of the frozen soil foundation; the problem of the temperature control device who is used for frozen soil foundation among the prior art effect singleness, can not adapt to the frozen soil foundation under extreme climatic conditions the complicated condition of conversion between layer and the active layer forever is solved.
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 that are below zero degrees centigrade and contain ice. Generally, the soil can be divided into seasonal frozen soil and perennial frozen soil. According to research and study of frozen earth scientists in China, the area of frozen earth in China (including perennial frozen earth and seasonal frozen earth with freezing depth of more than 0.5 m) is as high as 658 ten thousand square kilometers, and accounts for 68.6 percent of the area of national earth.
Frozen earth has rheological properties and long-term strength far below the instantaneous strength characteristics. Therefore, the construction of engineering structures in frozen soil areas must face two major risks: frost heaving and thaw sinking. The frozen soil foundation comprises a permafrost layer and an active layer, however, with global warming, extreme weather and climate events are frequent, especially extreme high-temperature and extreme low-temperature weather climates, the original permafrost layer of the frozen soil foundation may be partially converted into the active layer at the extreme high temperature, and the original active layer may be converted into the permafrost layer under the extreme low-temperature condition, 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 an active layer of the frozen soil foundation from melting when the surface temperature is high in summer and cooling; or the active layer of the frozen soil foundation is prevented from frost heaving when the ground surface temperature is low in winter, and the active layer is used for heating; the function is single, and the complex situation of transformation between the permafrost layer and the active layer of the frozen soil foundation under the extreme climatic condition cannot be adapted; meanwhile, in the prior art, the technology of reducing the ground temperature through air convection, such as paving broken stones and rubble stones, is not ideal and is easy to lose the effect of convection heat transfer due to wind sand or snow cover.
Disclosure of Invention
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 in the prior art is used for cooling or heating, has single action and cannot adapt to the complex condition of transformation between a permafrost layer and an active layer of the frozen soil foundation under extreme climatic conditions.
The technical scheme 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 in the surface of a frozen soil moving 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 pipe 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 pipe, and a gap is reserved between the partition plate and the bottom of the annular pipe to form a first refrigerant circulation loop; 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 a 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, a liquid suction core is arranged in the cylindrical pipe, and a circulation loop of the second refrigerant is formed; the cylindrical pipe comprises an evaporation section and a condensation section, the condensation section is embedded in the annular pipe, one end of the condensation section, which is far away from the evaporation section, is oppositely provided with a hemispherical rubber contact to form a structure that the rubber contact deforms under the temperature change 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;
still include to be configured to rotate the convection cooling device who connects in disc condenser axle center department, the convection cooling device includes the impeller, the impeller rotates through the pivot and connects in disc condenser axle center department, pivot top fixed connection has the fan cup subassembly, forms the fan cup subassembly and rotates and drive the impeller rotation, makes the air of impeller top form the structure of horizontal air current behind the impeller.
Preferably, one side of the interior of the disc-shaped condenser, which is far away from the ground, is fixedly connected with a fin group for heat dissipation, the fin group comprises a plurality of fins which are of rectangular plate-shaped structures and distributed in a circumferential array manner, each fin is fixedly connected to the top of the disc-shaped condenser, and a gap for a first refrigerant to pass through is reserved between each fin and the bottom of the disc-shaped condenser.
Preferably, a spherical sealing cavity is arranged in the rubber contact and used for containing air, air with set pressure is filled in the sealing cavity to form a structure that the two rubber contacts abut against the sealing cylindrical pipe, the air volume in the sealing cavity is reduced after the two rubber contacts are cooled, the two rubber contacts are deformed and separated, and the cylindrical pipe is communicated with the inner cavity of the annular pipe.
Preferably, the impeller comprises a front cover plate and a rear cover plate, the front cover plate is provided with an air inlet, the front cover plate and the rear cover plate are provided with arc-shaped blades distributed in a circumferential array manner on the opposite sides, the two side faces in 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 channel for air to pass through is formed between the adjacent blades.
Preferably, the wind cup assembly comprises four wind cups, each wind cup is of an oval hemispherical shell structure, the four wind cups are arranged oppositely, and each wind cup is fixedly connected to the top of the rotating shaft through a connecting part.
The invention has the beneficial effects that:
1. the invention 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, and has the beneficial effects of thawing and sinking the frozen soil foundation at high temperature and frost heaving the frozen soil foundation at extremely low temperature through a structure capable of being automatically regulated and controlled.
2. 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 mode during working so as to cool or preserve the temperature of the frozen soil foundation; when the external temperature is too low and reaches a 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 movable layer of the frozen soil foundation, heat is released on the movable layer of the frozen soil foundation, and the movable layer of the frozen soil foundation is prevented from further freezing to generate frost heaving diseases.
3. The convection cooling device changes the disordered ground surface airflow into regular horizontal airflow and diffuses from one center to the periphery along the ground through the centrifugation and air negative pressure principle, and has an effective cooling effect. Meanwhile, in the season in which frost is easily formed, heat released to the earth surface when the frost is formed is quickly diffused into the air, the lower temperature of the earth surface is kept, and the frozen earth foundation is prevented from melting.
Drawings
FIG. 1 is a block diagram of the present invention.
FIG. 2 is a structural view of the temperature control device of the present invention.
FIG. 3 is a cross-sectional view of an annular tube of the present invention.
Fig. 4 is a block diagram of the convective cooling device of the present invention.
Fig. 5 is a perspective view of the impeller of the present invention.
Wherein: the device comprises a temperature control device 1, a disc-shaped condenser 11, an annular pipe 12, a partition plate 121, a cylindrical pipe 13, an evaporation section 131, a condensation section 132, a wick 133, a rubber contact 134, a semiconductor refrigerator 14, a fin group 17, a compressor 18, a throttle valve 19, a convective cooling device 2, an impeller 21, a front cover plate 211, a rear cover plate 212, an air inlet 213, blades 214, a rotating shaft 22, a wind cup assembly 23 and a wind cup 231.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A temperature control device for frozen soil foundation, including being used for the inside cooling of frozen soil foundation or heat retaining temperature control device 1 and the convection current heat sink 2 that is used for the cooling of frozen soil foundation earth's surface, through the structure that can independently regulate and control, have the beneficial effect that the frozen swelling of frozen soil foundation when the frozen soil foundation that prevents when the temperature is high melts and sinks, the temperature is extremely low.
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 condensation part of the refrigerant, and the refrigerant is condensed, liquefied and released heat 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 the upper temperature control loop is embedded in the movable layer of the frozen soil foundation, the heat absorption section is arranged on the earth 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, the lower temperature control loop is provided with a channel which is opened and closed according to the external temperature and communicated with the upper temperature control loop, and a semiconductor refrigerator is arranged in the heat absorption section of the upper temperature control loop.
The method specifically comprises the following steps: the temperature control device 1 comprises a disc-shaped condenser 11 which is fixedly buried in the surface of the frozen soil moving layer, the disc-shaped condenser can effectively enlarge the refrigerating area relative to a columnar structure and the like, and meanwhile, on the basis of the gradual freezing or melting property of the frozen soil foundation from top to bottom and from the top to the inside, the condenser with the disc-shaped structure can effectively form a heat shield for the frozen soil foundation and the external atmosphere, so that the external heat is difficult to exchange to the frozen soil foundation, and the frozen soil foundation is effectively prevented from being thawed; meanwhile, the refrigerant storage device has a function of storing the refrigerant. The disc condenser 11 is provided with a cavity for accommodating or circulating a refrigerant in the upper temperature control circuit; the first refrigerant is ammonia, the ammonia has good water absorption, water can not be separated from ammonia liquid and frozen even at low temperature, so that the phenomenon of 'ice plug' in the system can not occur, the toxicity and explosive danger of the ammonia can be ignored because of the position with good ventilation, and the ammonia does not corrode steel, thereby being economical and efficient. An annular pipe 12 communicated with the disc-shaped condenser 11 is fixedly welded at the axis of the disc-shaped condenser 11, a partition plate 121 is arranged in the annular pipe 12, a gap is reserved between the partition plate 121 and the bottom of the annular pipe 12, the annular pipe 12 is divided into two cavities with communicated bottoms, and a channel is arranged at the position where each cavity is contacted with the disc-shaped condenser 11 and communicated with the disc-shaped condenser 11 to form a circulation loop for a first refrigerant; a compressor 18 and a throttle valve 19 are arranged in the condenser 11, 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 a connecting passage of the condenser 11 and the ring pipe 12 by a screw and is installed adaptively according to actual size.
When the condenser 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 to the disc-shaped condenser 11 after the pressure of the gaseous first refrigerant is increased, the gaseous first refrigerant is condensed into liquid with higher pressure in the disc-shaped condenser 11, and heat is released when the steam is liquefied to convert the heat to the outside; the first refrigerant in the liquid state with lower pressure condensed in the disc condenser 11 is converted into the liquid state with higher pressure by the throttle valve 19, sent into the loop pipe 12, absorbed heat in the loop pipe 12, evaporated into the gas state with lower pressure, and sucked by the compressor 18 to form the refrigeration cycle.
Temperature control device 1 still includes column pipe 13, be equipped with the second refrigerant in the column pipe 13, the second refrigerant includes but not limited to freon, commonly used refrigerant such as methyl alcohol, as preferred embodiment, the second refrigerant in this application be methyl alcohol, be equipped with wick 133 in the column pipe 13, wick 133 is prior art, has porous capillary structure, wick 133 is hugged closely with column pipe 13 inner wall and is contacted and fixed for form the circulation circuit of second refrigerant.
The cylindrical tube 13 includes an evaporation section 131 and a condensation section 132, and the diameter of the condensation section 132 is equal to the minimum inner diameter of the annular tube 12 and is embedded in the annular tube 12. The cylindrical pipe 13 is made of copper, so that the heat conducting property of the copper is relatively good, the manufacturing cost is low, and the heat transfer is facilitated. In order to further promote the heat exchange between the annular pipe 12 and the cylindrical pipe 13 and prevent the first refrigerant from corroding the cylindrical pipe 13, a graphite layer or a graphene layer is plated on the outer surface of the condensation section 132 of the cylindrical pipe 13, graphite and graphene have ultrahigh heat conductivity, but because the manufacturing cost is high, the application is only provided with a plating layer on the outer surface of the condensation section 132 of the cylindrical pipe 13, and the cylindrical pipe 13 can be made of graphite or graphene integrally. The material of column pipe 13 is aluminium, has plated graphite layer or graphite alkene layer at column pipe 13 inboard, prevents that first refrigerant from corroding, and simultaneously, aluminium has good heat conduction and thermal diffusivity, does benefit to heat transfer. The cylindrical pipe 13 is embedded in the annular pipe 12 to form a sealing structure, and one end of the cylindrical pipe 13 close to the annular pipe 12 is welded with the bottom of the annular pipe 12 into a whole.
When the refrigeration device works, the interior of the cylindrical pipe 13 is pumped into a set negative pressure, a set amount of second refrigerant is filled in the liquid absorption core 133, the second refrigerant evaporates and absorbs heat in the evaporation section 131, is converted into a gas state, rises to the condensation section 132, condenses and releases heat in the condensation section 132, the released heat is absorbed by the annular pipe, the condensed second refrigerant is converted into a liquid state, is absorbed by the liquid absorption core 133, flows back to the evaporation section 131 along the porous capillary structure under the action of pressure, evaporates and absorbs heat again, and a refrigeration loop is formed.
The heat absorbed by the toroidal tube 12 originates from the active layer of the frozen earth foundation and from the heat released by the condenser section 132. The heat in the frozen soil foundation is exchanged from the permafrost layer to the active layer and then from the active layer to the outside of the earth surface.
In order to prevent the frost heaving phenomenon of the movable layer of the frozen soil foundation under the extreme cold condition, a semiconductor refrigerator 14 is arranged at one end, close to a disc-shaped condenser 11, in the annular pipe 12, and the semiconductor refrigerator 14 is in the prior art and is used for condensing a refrigerant; the end of the condensing section 132 away from the evaporating section 131 is oppositely provided with a hemispherical rubber contact 134, and the rubber contact 134 is provided with a contact system therein and electrically connected with the semiconductor refrigerator 14, so as to form a structure that the rubber contact 134 deforms under the temperature change to open and close the condensing section 132. 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 pipe 13 is sealed, the contact system control circuit is powered off, and the semiconductor refrigerator 14 does not work; when the outside is at a set limit low temperature, the rubber contact 134 is separated under the action of heat loading and cold contraction, the cylindrical pipe 13 is communicated with the annular pipe 12, the contact system control circuit is electrified, the semiconductor refrigerator 14 starts to work, meanwhile, the circuits of the compressor 18 and the throttle valve 19 are disconnected to stop working, and at the moment, the upper temperature control loop loses the function and does not refrigerate any more; the heat release section of the lower temperature control loop is changed from the original condensation section 132 part into the part of the annular pipe 12, the lower temperature control loop converts the radiation heat of the permafrost layer from the earth center into the active layer, and the heat is released in the active layer, so that the active layer is prevented from being continuously frozen, and frost heaving diseases are caused.
In order to further reduce the ground temperature, the convection cooling device 2 is rotationally connected with the axis of the disc condenser 11. The convection cooling device 2 comprises an impeller 21, the impeller 21 is rotatably connected to the axis of the disc-shaped condenser 11 through a rotating shaft 22, a hub is fixedly welded to the axis of the impeller 21, a bearing is rotatably connected to the end of the rotating shaft 22, and the bearing is fixedly welded to 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 power, 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 the air is discharged along the horizontal direction under the action of centrifugal force generated by the rotation of the impeller 21, airflow diffused along the horizontal direction is formed, and therefore heat of the disc-shaped condenser 11 and the earth surface is taken away, the earth surface temperature is reduced, and the frozen earth foundation is prevented from melting.
In the above-mentioned or some embodiments, still include solar panel, solar panel electric connection has the battery, battery and each semiconductor refrigerator compressor electric connection form the power supply unit of this application. The same solar power supply device can simultaneously supply power to a plurality of semiconductor refrigerator compressors of the application.
During the use, at first drill hole on frozen soil foundation, or bury underground in the work progress, make two upper and lower control by temperature change return circuits of this application be located the active layer and the permafrost layer of frozen soil foundation respectively, under the non-extreme cold temperature condition, two rubber contact 134 looks remote site contradicts each other, is in the closed condition, upper and lower control by temperature change return circuit autonomous working. At the moment, under the circulation action of a second refrigerant, the heat absorption section of the lower temperature control loop absorbs the heat of the permafrost layer of the frozen soil foundation, the heat of the permafrost layer comes from the heat radiation of the earth center, the heat release section of the lower temperature control loop can not completely condense the second refrigerant, and the heat absorption section of the upper temperature control loop needs to absorb the heat of the heat release section of the lower temperature control loop to finish the condensation heat release; 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, and the heat release section completes condensation heat release in the surface disc-shaped condenser 11, so that the heat in the frozen soil foundation is released from the permafrost layer to the active layer and then from the active layer to the surface in a progressive manner, and meanwhile, the temperatures of the permafrost layer and the active layer of the frozen soil foundation are reduced, and the frozen soil foundation is prevented from melting and sinking.
In the above or some embodiments, a fin group 17 for dissipating heat is fixedly connected to a side of the disc-shaped condenser 11 away from the ground, 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 left between each fin and the bottom of the disc-shaped condenser 11, so that the condensing efficiency of the disc-shaped condenser 11 is improved.
In the above or some embodiments, a spherical sealed cavity is arranged in the rubber contact 134 and is used for containing air, the sealed cavity is filled with air with a set pressure, so as to form a structure that the two rubber contacts 134 contact against the sealed cylindrical tube 13, the air volume in the sealed cavity is reduced after the two rubber contacts 134 are cooled, the two rubber contacts 134 are deformed and separated, and the cylindrical tube 13 is communicated with the inner cavity of the annular tube (12). The rubber contact 134 is expanded with heat and contracted with cold and produces obvious deformation, and gaseous expanded with heat and contracted with cold and the effect is showing, and the deformation of supplementary rubber contact 134 realizes the control of this application section position change of releasing heat when limit low temperature.
In the foregoing or some embodiments, the impeller 21 includes a front shroud 211 and a rear shroud 212, the front shroud 211 has an air inlet 213, the front shroud 211 and the rear shroud 212 have blades 214 that are arc-shaped and distributed in a circumferential array on opposite sides, two longitudinal sides of the blades 214 are respectively connected with the front shroud 211 and the rear shroud 212 as a whole, and a flow channel for air to pass through 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, so that disordered air flow is changed into regular horizontal air flow and is diffused to the periphery along the ground by taking the impeller 21 as the center, and a good cooling effect is achieved. Meanwhile, in the season in which frost is easily formed, heat released to the earth surface when the frost is formed is quickly diffused into the air, the lower temperature of the earth surface is kept, and the frozen earth 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 elliptical hemispherical shell structure, four wind cups 231 are arranged 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 effect of increasing wind resistance, 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 ground surface of the frozen soil foundation.
Temperature control device 1 includes two different temperature control loops from top to bottom: the heat release section of the upper temperature control loop is embedded in the active 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 permafrost layer of the frozen soil foundation, and heat in the frozen soil foundation is exchanged to the outside in a progressive mode during working so as to cool or preserve the temperature of the frozen soil foundation;
the lower temperature control loop is provided with a channel which is opened and closed according to the control of the external temperature and is communicated with the upper temperature control loop, a semiconductor refrigerator is arranged in a 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, a heat release section of the lower temperature control loop is changed to an active layer of the frozen soil foundation, heat is released on the active layer of the frozen soil foundation, and the active layer of the frozen soil foundation is prevented from further freezing to generate frost heaving diseases.
Convection current heat sink 2 changes the mixed and disorderly air current of earth's surface into the horizontal air current of rule and with a center to diffusion all around along ground through centrifugation and air negative pressure principle, has effectual cooling effect. Meanwhile, in the season in which frost is easily formed, heat released to the earth surface when the frost is formed is quickly diffused into the air, the lower temperature of the earth surface is kept, and the frozen earth foundation is prevented from melting.
The present invention has been described in detail with reference to the specific embodiments and examples, but these are not intended to limit the present invention. Many variations and modifications may be made by one of ordinary skill in the art without departing from the principles of the present invention, which should also be considered as within the scope of the present 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 in the surface of a frozen soil moving 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 at the axis, 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 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 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), a liquid suction core (133) is arranged in the cylindrical pipe (13), and a circulation loop of the second refrigerant (16) is formed; the cylindrical pipe (13) comprises an evaporation section (131) and a condensation section (132), the condensation section (132) is embedded in the annular pipe (12), one end, far away from the evaporation section (131), of the condensation section (132) is provided with a hemispherical rubber contact (134) oppositely, a structure that the rubber contact (134) deforms under temperature change to enable the condensation section (132) to be opened and closed is formed, and a contact system is arranged in the rubber contact (134) and is electrically connected with the semiconductor refrigerator (14);
still including being configured as the convection current heat sink (2) of rotating connection in disc condenser (11) axle center department, convection current heat sink (2) include impeller (21), impeller (21) rotate through pivot (22) and connect in disc condenser (11) axle center department, pivot (22) top fixed connection has fan cup subassembly (23), forms fan cup subassembly (23) and rotates and drive impeller (21) and rotate, makes the air of impeller (21) top form the structure of horizontal air current behind impeller (21).
2. The temperature control device for frozen soil foundation as claimed in claim 1, wherein:
one side of keeping away from ground fixedly connected with fin group (17) that are used for the heat dissipation in disc condenser (11), fin group (17) include a plurality of rectangle platelike structure and be the fin that the circumference array distributes, each the fin is all fixed connection at disc condenser (11) top, each the fin all leaves the clearance that is used for first refrigerant (15) to pass through with disc condenser (11) bottom.
3. The temperature control device for frozen soil foundation as claimed in claim 1, wherein:
the rubber contact (134) is internally provided with a spherical sealing cavity for containing air, the sealing cavity is filled with air with set pressure, two rubber contacts (134) are formed to be abutted against the sealing cylindrical pipe (13), the air volume in the sealing cavity is reduced after the two rubber contacts (134) are cooled, and the two rubber contacts (134) are deformed and separated, 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 foundation as claimed in claim 1, wherein:
impeller (21) includes front shroud (211) and back shroud (212), front shroud (211) are equipped with air inlet (213), front shroud (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 whole with front shroud (211) and back shroud (212) respectively, and it is adjacent form the runner that is used for the air to pass through between blade (214).
5. The temperature control device for frozen soil foundation as claimed in claim 1, wherein:
the wind cup assembly (23) comprises wind cups (231), the wind cups (231) are of an oval hemispherical shell structure, the wind cups (231) are four and are arranged in pairs in an opposite mode, and each wind cup (231) is fixedly connected to the top of the rotating shaft (22) through a connecting part.
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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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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3935900A (en) * | 1971-08-25 | 1976-02-03 | Mcdonnell Douglas Corporation | Permafrost structural support with integral heat pipe means |
| US4036286A (en) * | 1972-11-02 | 1977-07-19 | Mcdonnell Douglas Corporation | Permafrost stabilizing heat pipe assembly |
| JP2001003350A (en) * | 1999-06-18 | 2001-01-09 | Kinjo Rubber Kk | Soil improvement method by board drain making use of freezing-thawing |
| CN2623748Y (en) * | 2003-05-15 | 2004-07-07 | 江苏中圣石化工程有限公司 | Low temperature heat rod with central temperature measurement tube |
| JP2006145059A (en) * | 2004-11-16 | 2006-06-08 | Mitsubishi Materials Natural Resources Development Corp | Hybrid type underground heat utilization heat pump device and its operating method |
| CN103836258A (en) * | 2012-11-27 | 2014-06-04 | 中国石油天然气股份有限公司 | Freeze soil area buried pipeline thaw collapse prevention and control method and device combining hot rod and coarse-grained soil |
| CN206570790U (en) * | 2017-02-13 | 2017-10-20 | 中圣科技(江苏)有限公司 | Nanometer energy-saving infrared defroster |
| CN107386030A (en) * | 2017-07-31 | 2017-11-24 | 中铁西北科学研究院有限公司 | The heat-staple method of frozen soil foundation is safeguarded using semiconductor driving heat-pipe refrigerating |
| CN108286840A (en) * | 2018-03-08 | 2018-07-17 | 北京交通大学 | Geothermal heat pump for preventing Frozen Area roadbed frost damage and implementation |
| CN209620008U (en) * | 2018-11-01 | 2019-11-12 | 华北电力大学（保定） | A kind of self cooling steel pipe screw pile of anti-thaw collapse for frozen ground regions |
| US20210355639A1 (en) * | 2020-05-13 | 2021-11-18 | Southwest University Of Science And Technology | Vertical ground heat exchanger for reducing temperature in carbonaceous shale rock mass and preventing roadbed frost heave |
-
2022
- 2022-01-28 CN CN202210106171.7A patent/CN114438994B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3935900A (en) * | 1971-08-25 | 1976-02-03 | Mcdonnell Douglas Corporation | Permafrost structural support with integral heat pipe means |
| US4036286A (en) * | 1972-11-02 | 1977-07-19 | Mcdonnell Douglas Corporation | Permafrost stabilizing heat pipe assembly |
| JP2001003350A (en) * | 1999-06-18 | 2001-01-09 | Kinjo Rubber Kk | Soil improvement method by board drain making use of freezing-thawing |
| CN2623748Y (en) * | 2003-05-15 | 2004-07-07 | 江苏中圣石化工程有限公司 | Low temperature heat rod with central temperature measurement tube |
| JP2006145059A (en) * | 2004-11-16 | 2006-06-08 | Mitsubishi Materials Natural Resources Development Corp | Hybrid type underground heat utilization heat pump device and its operating method |
| CN103836258A (en) * | 2012-11-27 | 2014-06-04 | 中国石油天然气股份有限公司 | Freeze soil area buried pipeline thaw collapse prevention and control method and device combining hot rod and coarse-grained soil |
| CN206570790U (en) * | 2017-02-13 | 2017-10-20 | 中圣科技(江苏)有限公司 | Nanometer energy-saving infrared defroster |
| CN107386030A (en) * | 2017-07-31 | 2017-11-24 | 中铁西北科学研究院有限公司 | The heat-staple method of frozen soil foundation is safeguarded using semiconductor driving heat-pipe refrigerating |
| CN108286840A (en) * | 2018-03-08 | 2018-07-17 | 北京交通大学 | Geothermal heat pump for preventing Frozen Area roadbed frost damage and implementation |
| CN209620008U (en) * | 2018-11-01 | 2019-11-12 | 华北电力大学（保定） | A kind of self cooling steel pipe screw pile of anti-thaw collapse for frozen ground regions |
| US20210355639A1 (en) * | 2020-05-13 | 2021-11-18 | Southwest University Of Science And Technology | Vertical ground heat exchanger for reducing temperature in carbonaceous shale rock mass and preventing roadbed frost heave |
Non-Patent Citations (2)
| Title |
|---|
| YAN LI ET AL.: ""Stability of the Foundation of Buried Energy Pipeline in Permafrost Region"", 《GEOFLUIDS》, vol. 2021 * |
| 杨宇轩等: ""基于热管技术的天然冷库设计 与数值模拟分析"", 《科技传播》 * |
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| CN114438994B (en) | 2024-01-30 |
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