Photovoltaic pile foundation composite heat preservation sleeve structure under plateau low temperature environment

Abstract

The utility model provides a kind of photovoltaic pile foundation composite heat preservation sleeve structure under plateau low temperature environment, it is related to photovoltaic power generation technical field, including: pile basic body, including below ground portion in ground surface and above ground portion in ground surface;Heat preservation sleeve, including inner tube and outer tube, the underground portion and the ground surface portion are all contained in the inner tube, one end of the outer tube is sealed end, the top end of the ground surface portion is abutting in the inner wall of sealed end, and heat preservation cavity is formed between the inner tube and outer tube;Heat preservation structure is located in the heat preservation cavity, for the underground portion and ground surface portion of the pile basic body are heat preservation.The utility model can carry out overall heat preservation to entire pile foundation, effectively solve the crack problem generated by thermal expansion and cold shrinkage of pile foundation under plateau low temperature environment, improve the stability and service life of pile foundation structure.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic power generation technology, and more specifically, to a composite insulation sleeve structure for photovoltaic pile foundations in high-altitude and low-temperature environments. Background Technology

[0002] When constructing photovoltaic power stations in high-altitude areas, the unique harsh environment, such as low temperatures, permafrost, and huge temperature differences between day and night, poses a severe challenge to the stability of the foundation structure.

[0003] In the prior art, CN219100103U discloses a pile foundation structure and photovoltaic equipment, which includes a pile body and an insulation component. One end of the pile body is buried below the ground surface, and the insulation component has an installation through hole. The pile body passes through the installation through hole, and the insulation component is buried below the ground surface, extending radially along the pile body. The insulation component divides the soil layer around the pile body into a freeze-thaw zone above the insulation component and an insulation zone below the insulation component. The insulation component can reduce or isolate heat transfer between the freeze-thaw zone and the insulation zone, preventing the soil layer in the insulation zone from freezing.

[0004] However, since the insulation component of CN219100103U is buried below the ground surface, the part of the pile foundation above the ground surface is still exposed to the low temperature environment. Under the condition of huge temperature difference between day and night, the part of the pile foundation above the ground surface is prone to cracks due to thermal expansion and contraction, which affects the stability and service life of the pile foundation structure. Utility Model Content

[0005] The purpose of this utility model is to provide a composite insulation sleeve structure for photovoltaic pile foundations in high-altitude and low-temperature environments. This structure can provide comprehensive insulation for the entire pile foundation, effectively solving the problem of cracks caused by thermal expansion and contraction of the pile foundation in high-altitude and low-temperature environments, and improving the stability and service life of the pile foundation structure.

[0006] This utility model is achieved through the following technical solution: a composite thermal insulation sleeve structure for photovoltaic pile foundations in high-altitude and low-temperature environments, comprising:

[0007] The basic structure of a pile includes the underground part located below the ground surface and the surface part located above the ground surface;

[0008] The thermal insulation sleeve includes an inner tube and an outer tube. The underground part and the surface part are both housed in the inner tube. One end of the outer tube is a sealed end. The top end of the surface part is pressed against the inner wall of the sealed end, and a thermal insulation cavity is formed between the inner tube and the outer tube.

[0009] An insulation structure, located within the insulation cavity, is used to insulate the underground and surface portions of the pile foundation.

[0010] Furthermore, the insulation structure includes an annular corrugated insulation board disposed within the insulation cavity and an inner insulation layer filled between the annular corrugated insulation board and the outer wall of the inner tube.

[0011] Furthermore, a plurality of first partition plates are provided between the annular corrugated insulation board and the outer wall of the inner tube. The plurality of first partition plates are evenly distributed along the circumferential direction of the outer wall of the inner tube to divide the inner insulation layer into a plurality of inner insulation areas.

[0012] Furthermore, a first heat insulation bag is provided in the inner heat insulation area. The length of the first heat insulation bag is adapted to the length of the inner tube, and the interior of the first heat insulation bag is filled with a first heat insulation gas.

[0013] Furthermore, the insulation structure also includes an outer insulation layer disposed between the annular corrugated insulation board and the inner wall of the outer pipe.

[0014] Furthermore, a plurality of second partition plates are provided between the annular corrugated insulation board and the inner wall of the outer tube. The plurality of second partition plates are evenly distributed along the circumferential direction of the inner wall of the outer tube, and are used to divide the outer insulation layer into a plurality of outer insulation areas.

[0015] Furthermore, a second heat insulation bag is provided in the outer heat insulation area. The length of the second heat insulation bag is adapted to the length of the inner tube, and the second heat insulation bag is filled with a second heat insulation gas.

[0016] Furthermore, the insulation structure also includes a reflective insulation layer disposed on the outer wall surface of the outer tube.

[0017] The technical solution of this utility model has at least the following advantages and beneficial effects:

[0018] This invention, by setting up an insulation sleeve, ensures that both the surface and underground parts of the pile foundation are located within the inner tube of the insulation sleeve. Simultaneously, by setting up an insulation structure within the insulation cavity formed between the inner and outer tubes, the surface and underground parts of the pile foundation are insulated, enabling the pile foundation to maintain a stable temperature even in low-temperature environments at high altitudes. This effectively avoids the situation where existing insulation methods can only protect the underground part, while the surface part is prone to cracking. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This utility model Figure 1 Enlarged view of section A;

[0021] Figure 3 This is an end view of the thermal insulation sleeve in this utility model.

[0022] Reference numerals: 10. Pile foundation; 11. Underground part; 12. Surface part; 20. Insulation sleeve; 21. Inner pipe; 22. Outer pipe; 221. Sealing end; 23. First partition plate; 24. Second partition plate; 30. Insulation structure; 31. Annular corrugated insulation board; 32. Inner insulation layer; 321. Inner insulation area; 322. First insulation bag; 33. Outer insulation layer; 331. Outer insulation area; 332. Second insulation bag; 34. Reflective insulation layer. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] Example

[0026] The following is for reference Figures 1-3 As shown in the figure, and further explained with reference to specific embodiments, this embodiment provides a photovoltaic pile foundation composite insulation sleeve structure for high-altitude low-temperature environments, including a pile foundation body 10 and an insulation sleeve 20. The pile foundation body 10 includes an underground part 11 located below the ground surface and a surface part 12 located above the ground surface. The insulation sleeve 20 includes an inner tube 21 and an outer tube 22. The underground part 11 and the surface part 12 are both housed in the inner tube 21. One end of the outer tube 22 is a sealed end 221, and the top end of the surface part 12 is pressed against the inner wall of the sealed end 221.

[0027] An insulation cavity is formed between the inner pipe 21 and the outer pipe 22. An insulation structure 30 is provided inside the insulation cavity. The insulation structure 30 is used to insulate the underground part 11 and the surface part 12 of the pile foundation 10.

[0028] Understandably, in this embodiment, by setting up an insulation sleeve 20, both the surface part 12 and the underground part 11 of the pile foundation 10 are located inside the inner tube 21 of the insulation sleeve 20. At the same time, by setting up an insulation structure 30 in the insulation cavity formed between the inner tube 21 and the outer tube 22, the surface part 12 and the underground part 11 of the pile foundation 10 are insulated, so that the pile foundation 10 can maintain a stable temperature in the low temperature environment of the plateau, effectively avoiding the situation where the existing insulation method can only protect the underground part 11 and the surface part 12 is prone to cracking.

[0029] Furthermore, the insulation structure 30 includes an annular corrugated insulation board 31 disposed in the insulation cavity and an inner insulation layer 32 filled between the annular corrugated insulation board 31 and the outer wall of the inner tube 21.

[0030] The annular corrugated insulation board 31 is a plate-like structure with an annular corrugated cross-section, which increases the insulation area and effectively blocks heat loss. Meanwhile, the inner insulation layer 32 can be filled with a material with low thermal conductivity, such as polyurethane foam or aerogel felt. This double-layer insulation structure 30 allows the temperature inside the insulation cavity to remain stable for a long time, providing strong protection for the normal operation of the pile foundation 10 in the low-temperature environment of the plateau.

[0031] Furthermore, a plurality of first partition plates 23 are provided between the annular corrugated insulation board 31 and the outer wall of the inner tube 21. The plurality of first partition plates 23 are evenly distributed along the circumferential direction of the outer wall of the inner tube 21 to divide the inner insulation layer 32 into a plurality of independent inner insulation areas 321.

[0032] The use of multiple first partition plates 23 enhances the structural stability of the inner insulation layer 32, effectively preventing a decrease in insulation performance due to localized settlement or displacement of the insulation material. Furthermore, each independent inner insulation area 321 can better maintain its internal temperature stability; even minor temperature changes in one area will not affect adjacent areas, thus ensuring the uniformity and durability of the temperature throughout the entire insulation cavity.

[0033] Furthermore, a first heat insulation bag 322 is provided in the inner heat insulation area 321. The length of the first heat insulation bag 322 is adapted to the length of the inner tube 21, and the first heat insulation bag 322 is filled with a first heat insulation gas.

[0034] In this embodiment, the first heat insulation bag 322 is made of a high-strength, airtight material, such as a rubber or plastic composite film, to ensure that the gas will not leak, thereby maintaining the heat insulation effect of the inner heat insulation area 321 for a long time. The first heat insulation gas is an inert gas such as argon or nitrogen. These inert gases have extremely low thermal conductivity, which can effectively reduce heat loss through gas convection and conduction.

[0035] The first insulation bag 322 further enhances the insulation effect of the inner insulation area 321. Since the length of the first insulation bag 322 is adapted to the length of the inner tube 21, it can fully cover the inner insulation area 321. Furthermore, the first insulation gas filled inside has excellent insulation performance, effectively reducing heat transfer through this area. At the same time, the first insulation gas is relatively stable and will not easily leak or change, maintaining its insulation characteristics for a long time, providing a more reliable guarantee for the stable operation of the entire insulation structure 30 in high-altitude, low-temperature environments.

[0036] Furthermore, the insulation structure 30 also includes an outer insulation layer 33 disposed between the annular corrugated insulation board 31 and the inner wall of the outer tube 22.

[0037] The external insulation layer 33 further enhances the thermal insulation performance of the entire insulation sleeve 20 structure. The external insulation layer 33 is also made of high-efficiency thermal insulation materials, such as aerogel felt or nanoporous calcium silicate board. By tightly adhering the external insulation layer 33 between the annular corrugated insulation board 31 and the inner wall of the outer pipe 22, a continuous thermal insulation barrier is formed, effectively blocking the path of heat transfer.

[0038] Furthermore, a plurality of second partition plates 24 are provided between the annular corrugated insulation board 31 and the inner wall of the outer tube 22. The plurality of second partition plates 24 are evenly distributed along the circumferential direction of the inner wall of the outer tube 22 to divide the outer insulation layer 33 into a plurality of independent outer insulation areas 331.

[0039] The use of multiple second partition plates 24 further enhances the structural stability of the outer insulation layer 33. Each independent outer insulation area 331 is effectively defined, preventing a decline in overall thermal insulation performance due to localized thermal expansion and contraction or material aging. Simultaneously, this partitioned design allows each outer insulation area 331 to function independently; even if the thermal insulation performance of one area deteriorates, it will not affect the normal function of other areas, thus ensuring the long-term stability and reliability of the entire insulation sleeve 20 structure in high-altitude, low-temperature environments.

[0040] Furthermore, a second heat insulation bag 332 is provided in the outer heat insulation area 331. The length of the second heat insulation bag 332 is adapted to the length of the inner tube 21, and the second heat insulation bag 332 is filled with a second heat insulation gas.

[0041] In this embodiment, the material of the second heat insulation bag 332 is the same as that of the first heat insulation bag 322, and the second heat insulation gas is also the same as that of the first heat insulation gas, which will not be described in detail here.

[0042] The installation of the second insulation bag 332 further enhances the thermal insulation performance of the external insulation area 331. Since the length of the second insulation bag 332 matches that of the inner tube 21, it can completely cover the external insulation area 331. Furthermore, the second insulation gas filled inside has extremely low thermal conductivity, significantly reducing heat loss through this area. Simultaneously, it enhances the overall compressive strength of the insulation structure 30. When the outer tube 22 is subjected to external pressure, the second insulation bag 332 acts as a buffer, protecting the inner tube 21 and the pile foundation 10 from damage.

[0043] Furthermore, the insulation structure 30 also includes a reflective insulation layer 34 disposed on the outer wall surface of the outer tube 22.

[0044] The reflective insulation layer 34 is made of highly reflective materials, such as aluminum foil or galvanized steel sheet. These materials effectively reflect solar radiation and external heat, reducing heat absorption by the insulation sleeve 20. In high-altitude areas with strong solar radiation and large diurnal temperature variations, the reflective insulation layer 34 significantly reduces the solar heat absorbed by the insulation sleeve 20 during the day and minimizes heat loss to the outside at night, thus maintaining a relatively stable internal temperature for the insulation sleeve 20. Furthermore, the reflective insulation layer 34 also possesses certain waterproof and corrosion-resistant properties, protecting the outer pipe 22 from environmental erosion and extending the service life of the insulation sleeve 20.

[0045] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A composite thermal insulation sleeve structure for photovoltaic pile foundations in high-altitude, low-temperature environments, characterized in that, include: The pile body (10) includes an underground part (11) below the ground surface and a surface part (12) above the ground surface; The heat-insulating sleeve (20) includes an inner tube (21) and an outer tube (22). The underground part (11) and the surface part (12) are both housed in the inner tube (21). One end of the outer tube (22) is a sealed end (221). The top end of the surface part (12) is pressed against the inner wall of the sealed end (221). A heat-insulating cavity is formed between the inner tube (21) and the outer tube (22). The insulation structure (30) is located inside the insulation cavity and is used to insulate the underground part (11) and the surface part (12) of the pile foundation (10).

2. The composite thermal insulation sleeve structure for photovoltaic pile foundations in high-altitude low-temperature environments according to claim 1, characterized in that, The insulation structure (30) includes an annular corrugated insulation board (31) disposed in the insulation cavity and an inner insulation layer (32) filled between the annular corrugated insulation board (31) and the outer wall of the inner tube (21).

3. The composite thermal insulation sleeve structure for photovoltaic pile foundations under high-altitude low-temperature environments according to claim 2, characterized in that, A plurality of first partition plates (23) are provided between the annular corrugated insulation board (31) and the outer wall of the inner tube (21). The plurality of first partition plates (23) are evenly distributed along the circumferential direction of the outer wall of the inner tube (21) to divide the inner insulation layer (32) into a plurality of independent inner insulation areas (321).

4. The composite thermal insulation sleeve structure for photovoltaic pile foundations in high-altitude low-temperature environments according to claim 3, characterized in that, The inner insulation area (321) is provided with a first heat insulation bag (322), the length of the first heat insulation bag (322) is adapted to the length of the inner tube (21), and the first heat insulation bag (322) is filled with a first heat insulation gas.

5. The composite thermal insulation sleeve structure for photovoltaic pile foundations in high-altitude low-temperature environments according to claim 4, characterized in that, The insulation structure (30) also includes an outer insulation layer (33) disposed between the annular corrugated insulation board (31) and the inner wall of the outer tube (22).

6. The composite thermal insulation sleeve structure for photovoltaic pile foundations under high-altitude low-temperature environments according to claim 5, characterized in that, A plurality of second partition plates (24) are provided between the annular corrugated insulation board (31) and the inner wall of the outer tube (22). The plurality of second partition plates (24) are evenly distributed along the circumferential direction of the inner wall of the outer tube (22) to divide the outer insulation layer (33) into a plurality of independent outer insulation areas (331).

7. The composite thermal insulation sleeve structure for photovoltaic pile foundations in low-temperature environments under high-altitude conditions according to claim 6, characterized in that, The outer insulation area (331) is provided with a second heat insulation bag (332), the length of the second heat insulation bag (332) is adapted to the length of the inner tube (21), and the second heat insulation bag (332) is filled with a second heat insulation gas.

8. The composite thermal insulation sleeve structure for photovoltaic pile foundations in high-altitude low-temperature environments according to claim 7, characterized in that, The insulation structure (30) also includes a reflective insulation layer (34) disposed on the outer wall surface of the outer tube (22).

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