• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a cooling system for a high-temperature transportation pipeline in a frozen soil region, the cooling system comprising a convection heat exchange box (1), a left ventilation channel (2), a right ventilation channel (3), and a middle ventilation channel (4), wherein the convection heat exchange box is buried underground and has a space in the center position for a high-temperature transportation pipeline (5) to pass through, so that a convection heat exchange space in the interior thereof surrounds the periphery of the high-temperature transportation pipeline; and air inlets at the top of the left ventilation channel and the right ventilation channel are each provided with a refrigeration component (6), and a heating component (8) and a first cowl (7) are provided at an air outlet at the top of the middle ventilation channel. The left and right ventilation channels suck in the air from the external environment, and the middle ventilation channel exhausts hot air from the inside of the convection heat exchange box. In this process, by enhancing the thermal pressure difference and the formation of active convection of air, the stack effect of the ventilation channels is greatly enhanced, thereby significantly improving the convection heat exchange efficiency, thus achieving the effect of effectively cooling the surrounding frozen soil layer while quickly taking away heat from the high-temperature transportation pipeline.
    公开号:NL2025795A
    申请号:NL2025795
    申请日:2020-06-09
    公开日:2020-09-25
    发明作者:Li Guoyu；Cao Yapeng；Mu Yanhu；Wu Gang；Feng Gang；Wang Fei
    申请人:Northwest Inst Of Eco Environment And Resources Chinese Academy Of Sciences；
    IPC主号:
    专利说明:

    P34595NLO0/MKO Title: Cooling System for High-Temperature Transportation Pipeline in Frozen Soil Region~ Technical Field The present invention relates to the technical field of the cooling of frozen soils, in particular to a cooling system for a high-temperature transportation pipeline in a frozen soil region. Background Art Frozen soil refers to soil or rock having a temperature of 0°C or less and containing ice. Due to the strong thermal sensitivity thereof, thaw collapse has become one of the main types of disasters since humans carried out engineering practices in frozen soil regions. Thaw collapse causes tilting, fissuring and collapse of house buildings; and waves, tilts and cracks in subgrade works, and uneven settlement of power transmission lines, oil transportation pipelines and water conservancy projects, etc.
    At present, frozen soil cooling measures are mainly divided into two types: active cooling and passive thermal insulation. Passive thermal insulation cannot change the trend of frozen soil degradation and cannot fundamentally solve the problem of thaw collapse disasters. Active cooling measures such as hot rods, ventilation pipes, and crushed stones are mostly suitable for above-ground projects such as railways, highways, and power transmission lines, but have greater limitations for underground linear projects such as buried high-temperature crude oil pipelines. Heat released from high-temperature oil transportation pipelines causes continuous thermal erosion to an underlying frozen soil layer, so that the upper limit of permafrost decreases, the body of the soil sinks, and the pipelines suffer from thaw collapse disasters. Trans-Alaska oil transportation pipeline built in the United States in 1977, which has a total length of 1280 km, a pipe diameter of 122 cm, and a delivery temperature of 38-83°C, is a long-distance large-diameter high-temperature pipeline laid in the form of a heat pipe + a pile foundation. China-Russia oil transportation pipeline, as one of the four major energy strategic projects of China, operates at a positive temperature all year round, and monitoring data of 2018 showed that the oil temperature at the outbound station of Mohe was close up to 25°C, and many thaw collapse disasters occurred along the pipeline. In order to achieve the purpose of the prevention of fire and thievery, the pipeline is laid in trenches and buried. For most traditional buried hot oil pipelines, thermal insulation layers are used for passive thermal insulation. Although the transfer of heat from oil pipes to the frozen soil layer is slowed to a certain extent, the general trend of frozen soil degradation cannot be reversed. Therefore, it is of great and far-reaching practical significance to develop a frozen
    2. soil cooling measure suitable for a buried high-temperature transportation pipeline for the safe operation of the pipeline.
    The patent for utility model with the application number 201520625756.5 discloses a heat release structure for a high-temperature oil transportation pipeline, the structure comprising a wind pipe structure and a thermal insulation structure. However, due to the fact that ventilation pipes in the wind pipe structure are of completely passive ventilation, the impact of the natural wind speed and direction is relatively large, and the convection heat exchange efficiency is relatively low; furthermore, in warm seasons, heat currents circulate in the pipes, which is very unfavorable for the protection of frozen soil.
    Summary of the Invention The technical problem to be solved by the present invention is to provide a cooling system for a high-temperature transportation pipeline in a frozen soil region, which cooling system can actively enhance the convection heat exchange process and improve the cooling efficiency.
    In order to solve the above-mentioned problem, the present invention provides a cooling system for a high-temperature transportation pipeline in a frozen soil region, the cooling system comprising a convection heat exchange box, a left ventilation channel and a right ventilation channel which are arranged on the left and right sides of the convection heat exchange box, and a middle ventilation channel arranged in the center of the top of the convection heat exchange box, wherein the convection heat exchange box is arranged along the length direction of a high-temperature transportation pipeline and buried underground, and has a space in the central position for the high-temperature transportation pipeline to pass through, so that a convection heat exchange space in the interior thereof surrounds the periphery of the high-temperature transportation pipeline; the above three ventilation channels are all in communication with the convection heat exchange space inside the convection heat exchange box and top parts of the three all extend out of the ground and are in communication with the external environment; air inlets at the top of both the left ventilation channel and the right ventilation channel are each provided with a refrigeration component, and a heating component and a first cowl are provided at an air outlet at the top of the middle ventilation channel, with the first cowl being used for exhausting hot air from the convection heat exchange box under the drive of natural wind.
    Preferably, the cooling system further comprises a controller connected to both the refrigeration components and the heating component, and an air temperature detection component connected to the controller, wherein the controller is used for controlling the on or off state of the refrigeration components and the heating component according to the temperature value detected by the air temperature detection component, and specifically,
    -3- when the temperature value is less than or equal to 0°C, the heating component is turned on while the refrigeration components are turned off, and when the temperature value is greater than 0°C, the heating component is turned off while the refrigeration components are turned on.
    Preferably, a second cowl and a third cowl are provided at the top of the air inlets at the top of the left ventilation channel and the right ventilation channel, respectively, and these two cowls are used for sucking in the air from the external environment into respective ventilation pipes under the drive of natural wind.
    Preferably, the refrigeration component is a semiconductor refrigeration sheet that surrounds the outer walls of the air inlets at the top of the left ventilation channel and the right ventilation channel. Preferably, the heating component is an electric heating wire that is arranged on the inner wall of the air outlet at the top of the middle ventilation channel. Preferably, bottom openings of the left ventilation channel and the right ventilation channel are located in a lower part of the convection heat exchange box. Preferably, the position of the first cowl is higher than the position of the top of the left ventilation channel and the right ventilation channel. Preferably, the first cowl comprises a support cylinder connected to the top of the middle ventilation channel, a rotation shaft arranged in the center of the top of the support cylinder via a ratchet wheel structure, a windward umbrella-shaped structure arranged at the top of the rotation shaft and located in the external environment, and a number of fan blades arranged at the bottom of the rotation shaft and located inside the support cylinder, wherein the windward umbrella-shaped structure comprises an umbrella-shaped rain shield and windward plates evenly distributed on an upper surface of the rain shield in the radial direction. Preferably, the lower part of the convection heat exchange box forms a U-shaped prefabricated structure with the left ventilation channel and the right ventilation channel, and the center of an upper surface of the bottom of the U-shaped prefabricated structure has a first arc adapted to the outer wall of the high-temperature transportation pipeline; the middle upper part of the convection heat exchange box forms an inverted Y-shaped prefabricated structure with the middle ventilation channel, and a second arc in the center of the lower surface of the inverted Y-shaped prefabricated structure is adapted to the outer wall of the high-temperature transportation pipeline; and the lower part of the convection heat exchange box in the U-shaped prefabricated structure and the middle upper part of the convection heat exchange box in the inverted Y-shaped prefabricated structure are spliced to form an integrated body, the inner spaces of the lower part and the middle lower part are in
    -4- communication with each other, and a space for the high-temperature transportation pipeline to pass through is formed between the first arc and the second arc. Preferably, the inner walls of the left ventilation channel and the right ventilation channel are provided with a number of light-weight backflow prevention plates evenly distributed in the vertical direction, and/or backflow reinforcement ribs are arranged on the inner wall of the bottom of the convection heat exchange box. Compared with the prior art, the present invention has the following advantages:
    1. In the present invention, the left and right ventilation channels are used for sucking in the air from the external environment, and the middle ventilation channel is used for exhausting hot air from the inside of the convection heat exchange box; furthermore, in this process, (1) the cooling function of the refrigeration components at the air inlets of the left and right ventilation channels and/or the heating function of the heating component at the air outlet of the middle ventilation channel can both enhance the thermal pressure difference between inlet ends on the two sides and an outlet end in the middle, (2) the exhaust function of the cowl at the air outlet of the middle ventilation channel forms active convection of air, and (3) at the same time, due to the provision of the middle ventilation channel, the heat of the high-temperature transportation pipeline itself can be ingeniously used for enhancing the thermal pressure difference, and under the combined effect of the enhancement of the thermal pressure difference and the formation of the active convection of air above, the stack effect of the ventilation channels is greatly enhanced, thereby significantly improving the convection heat exchange efficiency, thus achieving the effect of effectively cooling the surrounding frozen soil layer while quickly taking away heat from the high-temperature transportation pipeline.
    2. In the present invention, due to the provision of the refrigeration components at the air inlets of the left and right ventilation channels, the refrigeration components can make an air flow entering the ventilation channels become a cold air flow in warm seasons, so that the cooling system of the present invention can also cool the pipeline and frozen soil in the warm seasons. Brief Description of the Drawings The specific embodiments of the present invention will be further described in detail below in conjunction with the drawings. Figure 1 is a schematic structural diagram of a cooling system provided by an embodiment of the present invention. Figure 2 is another schematic structural diagram of a cooling system provided by an embodiment of the present invention.
    -5- In the drawings: 1 - convection heat exchange box, 2 - left ventilation channel, 3 - right ventilation channel, 4 - middle ventilation channel, 5 - high-temperature transportation pipeline, 6 - refrigeration component, 7 - first cowl, 8 - heating component, 9 - air temperature detection component, 10 - controller, 11 - backflow prevention plate, 12 - second cowl, 13 - third cowl, 14 - reinforcement rib, 15 - high-temperature crude oil, 16 - threaded through hole, 17 - upper pipeline guard plate, 18 - lower pipeline guard plate, 19 - ground temperature detection component, 20 - solar panel, 21 - backfill soil, 22 - backflow reinforcement ribs, 71 - support cylinder, 72 - rotation shaft, 73 - fan blade, 74 - rain shield, 75 - windward plate, 76 - ratchet wheel structure, and 77 - thrust ball bearing connecting column.
    Detailed Description of Embodiments Referring to Figures 1 and 2, an embodiment of the present invention provides a cooling system for a high-temperature transportation pipeline in a frozen soil region, the cooling system mainly comprising a convection heat exchange box 1, a left ventilation channel 2 and a right ventilation channel 3 which are arranged on the left and right sides of the convection heat exchange box, and a middle ventilation channel 4 arranged in the center of the top of the convection heat exchange box.
    The convection heat exchange box 1 is arranged along the length direction of a high- temperature transportation pipeline 5 and has a length adapted to the length of a section, which requires cooling protection, of the high-temperature transportation pipeline 5, the convection heat exchange box is buried underground and has a space in the central position for the high-temperature transportation pipeline 5 to pass through, so that a convection heat exchange space in the interior thereof surrounds the periphery of the high-temperature transportation pipeline 5; it can be understood that there are components that support and fix the high-temperature transportation pipeline 5 in the space in the central position of the convection heat exchange box 1 for the high-temperature transportation pipeline 5 to pass through.
    In practical applications, the high-temperature transportation pipeline 5 may be either a high-temperature oil transportation pipeline or a high-temperature gas transportation pipeline, and of course, it may also be another transportation pipeline that require cooling.
    The above three (left, right and middle) ventilation channels are all in communication with the convection heat exchange space inside the convection heat exchange box 1 and top parts of the three all extend out of the ground and are in communication with the external environment; air inlets at the top of the left ventilation channel 2 and the right ventilation channel 3 are each provided with a refrigeration component 6, and a heating component 8 and a first cowl 7 are provided at an air outlet at the top of the middle ventilation channel 4, with the first cowl 7 being used for exhausting hot air from the convection heat exchange box
    -6- 1 under the drive of natural wind. In actual manufacturing, a common exhaust cowl in the prior art may be directly used as the first cowl 7, or a cowl structure proposed below may also be used.
    With regard to the drawings, it should be noted that the first cowl 7, the second cowl 12 and the third cowl 13 are not shown in Figure 1; and the refrigeration components 6 and the heating component 8 are not shown in Figure 2.
    The heat dissipated from the high-temperature transportation pipeline 5 is radiated to the surroundings, so that the density of the air around the pipeline decreases, and the hot air rises and flows out from the middle ventilation channel 4, generating a thermal pressure difference to form a negative pressure environment, which results in a suction power; at the same time, cold air with a higher density enters the ventilation channels on bath sides as a supplement, convection heat exchange occurs in the convection heat exchange space in the convection heat exchange box 1 to cool the soil body around the transportation pipeline, and at the same time under the action of the heat of the transportation pipeline, the cold air is warmed up, rises and is exhausted from the middle ventilation channel 4 again to take away the heat generated by the transportation pipeline.
    The first cowl 7 is arranged at the top of the air outlet at the top of the middle ventilation channel 4, and the heating component 8 is located lower than the first cowl 7 and is arranged inside the air outlet at the top of the ventilation channel 4. The position of the first cowl 7 is higher than the positions of the top of the left ventilation channel 2 and the right ventilation channel 3. This form of being high in the middle and low in both ends facilitates the entry of an air flow on both sides and then exit from the middle.
    Furthermore, a second cowl 12 and a third cowl 13 are provided at the top of the air inlets at the top of the left ventilation channel 2 and the right ventilation channel 3, respectively, and these two cowls are used for sucking in the air from the external environment into respective ventilation pipes under the drive of natural wind in order to achieve a further enhancement of the stack effect. The arrangement of each cowl can also prevent wind sand, rain, etc. from entering the ventilation channels.
    In practical applications, the three (left, right and middle) ventilation channels are made of thermally conductive (metal) materials, such as steel pipes. The air flows entering the left and right ventilation channels are first refrigerated at the ports of the pipes, and the gases in the wind pipes on both sides are forcedly refrigerated, and at the same time, since the middle pipe is heated by the heat of the transportation pipeline and a heating wire, the gases are warmed up, and under the effect of the thermal pressure difference, the stack effect is enhanced.
    The refrigeration component 6 is specifically made up of a semiconductor refrigeration sheet that surrounds the outer walls of the air inlets at the top of the left ventilation channel 2
    -7- and the right ventilation channel 3; it can be understood that a cold end of the semiconductor refrigeration sheet is close to and closely attached to the outer wall of the steel pipe for refrigeration and cooling, and a hot end is far away from the outer wall of the steel pipe to facilitate the dissipation of the heat generated during the refrigeration process by air cooling. In order to prevent the semiconductor refrigeration sheet from being affected by wind and sun, a protective casing may be further provided therefor. The heating component 8 is specifically made up of an electric heating wire that is arranged on the inner wall of the air outlet at the top of the middle ventilation channel 4. The arrangement of the semiconductor refrigeration sheet and the heating wire at the ports of the pipes has two purposes, one of which is to facilitate heat dissipation by the hot end of the semiconductor refrigeration sheet by means of air cooling so as to improve the refrigeration efficiency thereof, and the other one of which is to facilitate maintenance and replacement in case the semiconductor refrigeration sheet and the heating wire fail.
    The inner walls of the left ventilation channel 2 and the right ventilation channel 3 are provided with a number of light-weight backflow prevention plates 11 evenly distributed in the vertical direction; and when the air flows in the wind pipes on both sides rise, light-weight wind plates are lifted upward, which can block the backflow of the gases to a certain extent. Backflow reinforcement ribs 22 are arranged on the inner wall of the bottom of the convection heat exchange box 1, with the reinforcement ribs on the left and right sides being both inclined toward the middle, so that on the one hand, the flow of the gas in the convection heat exchange space toward the ventilation channels on both sides can be blocked to a certain extent, and on the other hand, the structural stability of the bottom of the convection heat exchange box 1 is guaranteed to prevent deformation. Of course, it can be understood that due to the existence of the enhancement of the thermal pressure difference and the formation of the active convection of air in the present invention, the phenomenon of reverse gas flow is not obvious.
    Bottom openings of the left ventilation channel 2 and the right ventilation channel 3 are located in a lower part of the convection heat exchange box 1, so that the sucked cold air starts to act from the lower part or bottom of the convection heat exchange box 1, and at the same time, the hot air in the middle upper part of the convection heat exchange box 1 is concentratedly exhausted from the middle ventilation channel 4, that is, the hot air is exhausted quickly from the middle upper part and the cold air is quickly introduced from the lower bottom part, thereby significantly improving the cooling efficiency while accelerating the convection heat exchange process.
    Based on the cooling system disclosed in the above content, in order to improve the service life and efficiency of the refrigeration components 6 and the heating component 8, the cooling system of the present invention, with reference to Figure 2, further comprises a
    -8- controller 10 connected to both the refrigeration components 6 and the heating component 8 and an air temperature detection component 9 connected to the controller 10, wherein the controller 10 is used for controlling the on or off state of the refrigeration components 6 and the heating component 8 according to the temperature value detected by the air temperature detection component 9, and specifically, when the temperature value is less than or equal to 0°C, the heating component 8 is turned on while the refrigeration components 6 are turned off, and when the temperature value is greater than 0°C, the heating component 8 is turned off while the refrigeration components 6 are turned on.
    In practical applications, a ground temperature detection component 19, such as a thermistor, may also be buried in the soil around the cooling system of the present invention to realize the monitoring of the ground temperature in real time. The communication connection between the controller 10 and the refrigeration components 6, the heating component 8, and the ground temperature detection component 19 may be either a wired connection or a wireless connection.
    Electric components such as the refrigeration components 6, the heating component 8, the air temperature detection component 9 and the ground temperature detection component 19 are collectively powered by the solar panel 20.
    Based on the cooling system disclosed in the above content, for the specific structure of the first cowl 7, the present invention provides an implementation solution in which the first cowl 7 comprises a support cylinder 71 connected to the top of the middle ventilation channel 4, a rotation shaft 72 arranged in the center of the top of the support cylinder 71 via a ratchet wheel structure 76, a windward umbrella-shaped structure arranged at the top of the rotation shaft 72 and located in the external environment, and a number of fan blades 73 arranged at the bottom of the rotation shaft 72 and located inside the support cylinder 71, wherein the windward umbrella-shaped structure comprises an umbrella-shaped rain shield 74 and windward plates 75 evenly distributed on an upper surface of the rain shield 74 in the radial direction.
    Furthermore, the ratchet wheel structure 76 is arranged on the lower surface of the center of the top of the support cylinder 71, and the upper surface of the center of the top of the support cylinder 71 is further provided with a thrust ball bearing connecting column 77 sleeved on the rotation shaft 72; and the inner diameter of the support cylinder 71 is adapted to the outer diameter of the middle ventilation channel 4 and the middle ventilation channel is sleeved inside the support cylinder, and the support cylinder 71 is fixed in position in the middle ventilation channel 4 by means of bolts. The support cylinder 71 has an expanded inner diameter structure within a distance above and below the fan blades 73 to adapt to the large diameter of the fan blades 73, and the large diameter of the fan blades 73 is set to enhance the exhaust effect.
    -9- It can be understood that by changing the direction of the rotation of the fan blades 73, the functions of active exhaust and active suction of gas can be achieved respectively, that is, this may likewise be implemented for the second cowl 12 and the third cowl 13 based on the structure of the cowl above. The function of the ratchet wheel structure 76 therein is to ensure that the fan blades 73 always rotate in one direction, i.e., always serving the exhaust function or the suction function.
    Based on the cooling system disclosed in the above content, the entire cooling system in the present invention is divided into the following several prefabricated parts, and based on such a prefabricated scheme, convenient and fast field splicing and assembly are achieved.
    The lower part of the convection heat exchange box 1 forms a U-shaped prefabricated structure with the left ventilation channel 2 and the right ventilation channel 3, and the center of an upper surface of the bottom of the U-shaped prefabricated structure has a first arc adapted to the outer wall of the high-temperature transportation pipeline 5, which first arc corresponds to a lower pipeline guard plate 18 in Figure 2. In the U-shaped prefabricated structure, the parts on both sides above the middle are the left and right ventilation channels.
    The middle upper part of the convection heat exchange box 1 forms an inverted Y- shaped prefabricated structure with the middle ventilation channel 4, and a second arc in the center of the lower surface of the inverted Y-shaped prefabricated structure is adapted to the outer wall of the high-temperature transportation pipeline 5, which second arc corresponds to an upper pipeline guard plate 17 in Figure 2.
    The lower part of the convection heat exchange box 1 in the U-shaped prefabricated structure and the middle upper part of the convection heat exchange box 1 in the inverted Y- shaped prefabricated structure are spliced to form an integrated body, the inner spaces of the lower part and the middle lower part are in communication with each other, and a space for the high-temperature transportation pipeline 5 to pass through is formed between the first arc (i.e., the lower pipeline guard plate 18) and the second arc (i.e., the upper pipeline guard plate 17), which also function to support and fix same.
    Furthermore, the U-shaped prefabricated structure and the inverted Y-shaped prefabricated structure can be either an integrated structure or spliced two prefabricated parts that are half segmented along the length thereof, the choice for which depends on specific requirements; and a number of reinforcement ribs 14 are provided between the inner wall of the convection heat exchange box 1 and the inner walls of the first and second arcs to ensure the stability of the entire structure.
    There is a fixation component for achieving connection at each of spliced joints between these prefabricated structures. For example, as shown in Figure 2, the U-shaped prefabricated structure and the inverted Y-shaped prefabricated structure are both provided with outwardly protruded connecting ears on the outer walls at the spliced joints, both of
    -10- which connecting ears have threaded through holes 18, and bolts are passed through the upper and lower two threaded through holes 16 and tightened with nuts. The U-shaped prefabricated structure and the inverted Y-shaped prefabricated structure are both set in a half-segmented manner, that is, the cooling system mainly consists of the lower two parts and the upper two parts, such that during actual installation and construction: before laying the high-temperature transportation pipeline 5, the lower two parts of the structure are first installed and connected by means of bolts, and the high-temperature transportation pipeline 5 is then laid; then, the upper two parts of the structure are then installed and also connected by means of bolts, waterproofing and sealing work should be well made for seams at the joints; after backfilling with pipe embankment soil, the upper cowl structure is connected by using bolts, and at the same time the semiconductor refrigeration sheet and the heating wire are connected; and finally, the controller 10, the solar panel 20, relevant circuit boards, etc. are connected.
    The technical solution provided by the present invention has been described in detail above. The specific examples are used herein to describe the principle and embodiments of the present invention, and the description of the foregoing examples is merely intended to help understand the method of the present invention and the core concept thereof. It should be noted that a person of ordinary skill in the art would also make various improvements and modifications to the present invention without departing from the principle of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.
    权利要求:
    Claims (10)
    [1]
    A refrigeration system for a high temperature transport pipe in a frozen bottom region, characterized in that the refrigeration system comprises a convection heat exchanger (1), a left ventilation channel (2) and a right ventilation channel (3) arranged on the left and right sides. right side of the convection heat exchanger, and includes a middle ventilation duct (4) arranged in the center of the top of the convection heat exchanger, in which the convection heat exchanger (1) is arranged in the longitudinal direction of a high temperature transfer pipe (5 ) and is buried underground, and has a space in the central position through which the high temperature transport pipe (5) can pass, so that a convection heat exchange space in the interior thereof surrounds the periphery of the high temperature transport pipe (5); the three above-mentioned ventilation channels all communicate with the convection heat exchange space in the convection heat exchanger (1) and the top parts of the three all protrude from the ground and communicate with the external environment; air inlets at the top of the left ventilation duct (2} and the right ventilation duct (3) are each provided with a cooling component (6), and a heating component (8) and a first hood (7) is provided at an air outlet at the top of the middle ventilation duct (4), wherein the first hood (7) is used to exhaust warm air from the convection heat exchanger (1) under natural wind drive.
    [2]
    The refrigeration system according to claim 1, characterized in that the refrigeration system further comprises a controller (10) connected to both the refrigeration components (6) and the heating component (8), and an air temperature detection component (9) connected to the controller (10), the controller (10) being used to control the on or off state of the cooling components (6) and the heating component (8) in accordance with the temperature value detected by the air temperature sensing component (9), and more specifically, when the temperature value is less than or equal to 0 ° C, the heating component (8) is turned on while the cooling components (6) are turned off, and when the temperature value is higher than 0 ° C, the heating component (8) is turned off while the cooling components (6) are switched on.
    [3]
    The cooling system according to claim 1, characterized in that a second hood (12) and a third hood (13) are provided at the top of the air inlets at the top of the left ventilation channel (2) and the right ventilation channel (3), respectively, and these two hoods
    -12- are used for drawing air from the external environment into respective ventilation pipes under the drive of natural wind.
    [4]
    The cooling system according to claim 1, characterized in that the cooling component (6) is a semiconductor cooling plate surrounding the outer walls of the air inlets at the top of the left ventilation channel (2) and the right ventilation channel (3).
    [5]
    The cooling system according to claim 1, characterized in that the heating component (8) is an electrical heating wire arranged on the inner wall of the air outlet at the top of the middle ventilation duct (4).
    [6]
    The refrigeration system according to claim 1, characterized in that the lower openings of the left ventilation channel (2) and the right ventilation channel (3) are located in a lower part of the convection heat exchanger (1).
    [7]
    The cooling system according to claim 1, characterized in that the position of the first hood (7) is higher than the position of the top of the left ventilation channel (2) and the right ventilation channel (3).
    [8]
    The cooling system according to claim 1, characterized in that the first hood (7) comprises a support cylinder (71) connected to the top of the middle ventilation duct (4), a rotation axis (72) arranged in the center of the top of the support cylinder (71) via a ratchet wheel structure (76), a windward umbrella-shaped structure located at the top of the axis of rotation (72) and located in the external environment, and a number of fan blades (73) arranged are at the bottom of the axis of rotation (72) and located within the support cylinder (71), the windward umbrella-shaped structure comprising an umbrella-shaped rain cover (74) and windward plates (75) evenly distributed over a top surface of the rain cover (74). ) in radial direction.
    [9]
    Cooling system according to claim 1, characterized in that the lower part of the convection heat exchanger (1) forms a U-shaped prefabricated structure with the left ventilation channel (2) and the right ventilation channel (3), and the center of a top surface of the bottom of the U-shaped prefabricated structure has a first arc which is adapted to the outer wall of the high temperature transport pipe (5); the middle top part of the convection heat exchanger (1) forms an inverted Y-shaped prefabricated structure with the middle ventilation duct (4) and a second arc in the center of the bottom surface of the inverted Y-shaped prefabricated
    -13- structure is adapted to the outer wall of the high temperature transport pipe (5); and the lower part of the convection heat exchanger (1) in the U-shaped prefabricated structure and the middle upper part of the convection heat exchanger (1) in the inverted Y-shaped prefabricated structure are split to form an integrated body, the inner spaces of the lower part and the middle lower part are in communication with each other, and a space through which the high temperature transport conduit (5) can pass is formed between the first arc and the second arc.
    [10]
    Cooling system according to claim 1, characterized in that the inner walls of the left ventilation channel (2) and the right ventilation channel (3) are provided with a number of lightweight backflow prevention plates (11) that are evenly distributed in the vertical direction, and / or return flow reinforcing ribs (22) are provided on the inner wall of the bottom of the convection heat exchanger (1).
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    同族专利:
    公开号 | 公开日
    CN110185935A|2019-08-30|
    NL2025795B1|2021-11-30|
    引用文献:
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    US3815671A|1972-12-05|1974-06-11|J Turner|Pipeline forced air convective heat transfer system|
    CN201649064U|2010-01-11|2010-11-24|大连熵立得传热技术有限公司|Long-standing permafrost region buried pipeline using flexible hot pin as heat radiation mechanism|
    CN203036085U|2012-11-27|2013-07-03|中国石油天然气股份有限公司|Buried pipeline thaw collapse prevention device with hot sticks and coarse particle soil combined in permafrost region|
    CN204879457U|2015-08-19|2015-12-16|中国科学院寒区旱区环境与工程研究所|High temperature oil pipeline's exothermic structure|
    CN112901909B|2021-01-21|2021-09-10|中国科学院西北生态环境资源研究院|Buried pipeline fixing device and fixing method thereof|
    CN112901908B|2021-01-21|2021-10-08|中国科学院西北生态环境资源研究院|Pipeline fixed mounting system based on energy recovery|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CN201910535625.0A|CN110185935A|2019-06-20|2019-06-20|A kind of cooling system of permafrost region high temperature transport pipeline|
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