Anti-fouling and non-interfering geothermal heat extraction device

Abstract

The utility model relates to the technical field of geothermal heat extraction, and disclose a kind of anti-fouling non-interference geothermal heat extraction device, including heat exchange pipeline, multiple scale cleaning devices and the U-shaped well opened in ground, the anti-fouling non-interference geothermal heat extraction device, by being provided with heat exchange pipeline in the U-shaped well opened in ground, multiple scale cleaning devices are provided in the U-shaped pipe of heat exchange pipeline, in the process of heat exchange, flowing water flow can make scale cleaning device work, the scale adhered on the inner wall of U-shaped pipe is cleaned, to prevent interference to heat energy extraction.

Description

Technical Field

[0001] This utility model relates to the field of geothermal heat extraction technology, specifically to a geothermal heat extraction device that prevents scaling and avoids interference. Background Technology

[0002] Geothermal heat extraction refers to the technical process of extracting and utilizing heat energy from underground. Its core lies in extracting the heat energy stored underground (usually in the form of hot water, steam, or dry hot rock) to the surface through engineering means for power generation, heating, agricultural greenhouses, or other heat energy applications.

[0003] Some geothermal heat extraction devices on the market currently use U-shaped wells and heat exchange pipes installed underground. They extract heat energy by injecting flowing water into the heat exchange pipes and exchanging heat underground. However, during long-term operation, scale will be generated and adhere to the inner wall of the heat exchange pipes, thereby reducing the heat exchange efficiency and effect and interfering with the heat energy extraction.

[0004] Therefore, we propose a scale-resistant and interference-free geothermal heat extraction device to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this invention is to solve the problem of some current geothermal heat extraction devices that extract heat energy by installing U-shaped wells and heat exchange pipes underground and injecting flowing water into the heat exchange pipes. During long-term operation, scale will adhere to the inner wall of the heat exchange pipes, thereby reducing the heat exchange efficiency and effect and interfering with the heat energy extraction.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a scale-resistant and interference-free geothermal heat extraction device, comprising: a U-shaped well opened underground, wherein the underground includes a rock and soil zone and a geothermal zone;

[0007] A heat exchange pipe is installed inside a U-shaped well. The heat exchange pipe includes two extension pipes installed in the rock and soil zone, and a U-shaped pipe is installed between the two extension pipes. The extension pipes correspond to the rock and soil zone, and the U-shaped pipe corresponds to the geothermal zone.

[0008] Multiple scale removal devices are installed inside the U-shaped tube, and the scale on the inner wall of the U-shaped tube is removed by the action of water flow.

[0009] Furthermore, a first flange is provided at one end of the extension tube and the end of the U-shaped tube. A first bolt and a first nut are provided on the first flange. The extension tube and the U-shaped tube are connected by the cooperation of the first flange, the first bolt and the first nut.

[0010] Furthermore, it also includes a water supply tank and a water storage tank, as well as a water pump. A first water guide pipe is connected between the water supply tank and the input end of the water pump. A second water guide pipe is provided between the output end of the water pump and one of the extension pipes. A third water guide pipe is provided between the other extension pipe and the water storage tank. A second flange is provided at one end of the extension pipe, one end of the second water guide pipe, and one end of the third water guide pipe. A second bolt and a second nut are provided on the second flange. The extension pipe is connected to the second water guide pipe and the extension pipe is connected to the third water guide pipe through the cooperation of the second flange, the second bolt, and the second nut.

[0011] Furthermore, the scale removal device includes two receiving rods, a U-shaped rod is provided between the two receiving rods, a scraper is provided on the U-shaped rod, and protruding rods that are rotatably connected to the receiving rods are provided at both ends of the U-shaped rod, with impeller blades provided on the protruding rods.

[0012] Furthermore, the outer surface of the extension tube is covered with a heat insulation layer.

[0013] Furthermore, a third bolt is provided on the outer surface of the U-shaped tube, and threaded holes adapted to the third bolt are provided at both ends of the receiving rod. The receiving rod is fixed inside the U-shaped tube by the cooperation of the third bolt and the threaded holes, and a first sealing rubber gasket is provided between the two ends of the receiving rod and the inner wall of the U-shaped tube.

[0014] Furthermore, a second sealing rubber gasket is provided between the first flanges, and a third sealing rubber gasket is provided between the second flanges.

[0015] The beneficial effects of this utility model are as follows: By setting up a heat exchange pipe in a U-shaped well underground, and installing multiple scale removal devices inside the U-shaped pipe of the heat exchange pipe, the flowing water will cause the scale removal devices to work during the heat exchange process, cleaning the scale adhering to the inner wall of the U-shaped pipe and preventing interference with heat extraction. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the anti-scaling and interference-free geothermal heat extraction device of this utility model;

[0017] Figure 2 This is a utility model Figure 1 A magnified schematic diagram of the local structure A;

[0018] Figure 3 This is a utility model Figure 1 A magnified schematic diagram of the local structure B;

[0019] Figure 4 This is a schematic diagram of the scale removal device structure of the geothermal heat extraction device that prevents scaling and causes no interference.

[0020] The names corresponding to each mark in the diagram:

[0021] 1. Rock and soil area; 2. Geothermal area; 3. Extension pipe; 4. U-shaped pipe; 5. Scale removal device; 51. Receiving rod; 511. Threaded hole; 52. U-shaped rod; 53. Scraper; 54. Protruding rod; 55. Impeller blade; 6. First flange; 7. First bolt; 8. First nut; 9. Water supply tank; 10. Water storage tank; 11. Water pump; 12. First water guide pipe; 13. Second water guide pipe; 14. Third water guide pipe; 15. Second flange; 16. Second bolt; 17. Second nut; 18. Thermal insulation layer; 19. Third bolt; 20. First sealing rubber gasket; 21. Second sealing rubber gasket; 22. Third sealing rubber gasket; 23. Sealed bearing. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0023] Embodiments of this utility model:

[0024] like Figures 1-4 As shown, this utility model provides a scale-resistant and interference-free geothermal heat extraction device, including a heat exchange pipe, multiple scale removal devices 5, and a U-shaped well underground. The underground area includes a rock and soil zone 1 and a geothermal zone 2. The heat exchange pipe is installed in the U-shaped well and includes two extension pipes 3 installed in the rock and soil zone 1. A U-shaped pipe 4 is installed between the two extension pipes 3. The extension pipes 3 correspond to the rock and soil zone 1, and the U-shaped pipe 4 corresponds to the geothermal zone 2. A first flange 6 is installed at one end of the extension pipe 3 and the end of the U-shaped pipe 4. A first bolt 7 and a first nut 8 are installed on the first flange 6. The extension pipe 3 and the U-shaped pipe 4 are connected by the cooperation of the first flange 6, the first bolt 7, and the first nut 8. When the water in the heat exchange pipe passes through the U-shaped pipe 4, it will exchange heat with the geothermal zone 2.

[0025] like Figures 1-4As shown, it also includes a water supply tank 9, a water storage tank 10, and a water pump 11. A first water guide pipe 12 is connected between the water supply tank 9 and the input end of the water pump 11. A second water guide pipe 13 is provided between the output end of the water pump 11 and one of the extension pipes 3. A third water guide pipe 14 is provided between the other extension pipe 3 and the water storage tank 10. A second flange 15 is provided at one end of the extension pipe 3, one end of the second water guide pipe 13, and one end of the third water guide pipe 14. A second bolt 16 and a second nut 17 are provided on the second flange 15. The extension pipe 3 is connected to the second water guide pipe 13 and the extension pipe 3 is connected to the third water guide pipe 14 through the cooperation of the second flange 15, the second bolt 16, and the second nut 17. Power is provided by the water pump 11 to guide the water in the water supply tank 9 into the heat exchange pipe for heat extraction. The water after heat extraction enters the water storage tank 10 through the third water guide pipe 14 for storage and use.

[0026] like Figures 1-4 As shown, multiple scale removal devices 5 are installed inside the U-shaped tube 4. The scale on the inner wall of the U-shaped tube 4 is cleaned by the action of water flow. The scale removal device 5 includes two receiving rods 51, and a U-shaped rod 52 is arranged between the two receiving rods 51. A scraper 53 is arranged on the U-shaped rod 52. Both ends of the U-shaped rod 52 are provided with protruding rods 54 that are rotatably connected to the receiving rods 51. The receiving rods 51 are provided with sealed bearings that are compatible with the protruding rods 54. The protruding rods 54 are provided with impeller blades 55. The flowing water will impact the impeller blades 55, causing the protruding rods 54 to drive the U-shaped rods 52 to rotate, thereby causing the scraper 53 to rotate and clean the scale on the inner wall of the U-shaped tube 4.

[0027] like Figures 1-4 As shown, the outer surface of the extension pipe 3 is covered with a heat insulation layer 18. This design insulates the water flowing inside the extension pipe 3, reducing heat loss. A third bolt 19 is provided on the outer surface of the U-shaped pipe 4. Both ends of the receiving rod 51 are provided with threaded holes 511 that are compatible with the third bolt 19. The receiving rod 51 is fixed inside the U-shaped pipe 4 by the cooperation of the third bolt 19 and the threaded holes 511. A first sealing rubber gasket 20 is provided between the two ends of the receiving rod 51 and the inner wall of the U-shaped pipe 4. A second sealing rubber gasket 21 is provided between the first flanges 6. A third sealing rubber gasket 22 is provided between the second flanges 15. This design provides a seal and prevents water from overflowing.

Claims

1. A geothermal heat extraction device that prevents scaling and avoids interference, characterized in that, include: A U-shaped well is constructed underground, the underground including a rock and soil zone (1) and a geothermal zone (2); A heat exchange pipe is installed in a U-shaped well. The heat exchange pipe includes two extension pipes (3) installed in the rock and soil zone (1). A U-shaped pipe (4) is installed between the two extension pipes (3). The extension pipes (3) correspond to the rock and soil zone (1), and the U-shaped pipe (4) corresponds to the geothermal zone (2). Multiple scale removal devices (5) are installed inside the U-shaped tube (4) to clean the scale on the inner wall of the U-shaped tube (4) under the action of water flow.

2. The anti-scaling and interference-free geothermal heat extraction device according to claim 1, characterized in that: A first flange (6) is provided at one end of the extension tube (3) and the end of the U-shaped tube (4). A first bolt (7) and a first nut (8) are provided on the first flange (6). The extension tube (3) and the U-shaped tube (4) are connected by the cooperation of the first flange (6), the first bolt (7) and the first nut (8).

3. The anti-scaling and interference-free geothermal heat extraction device according to claim 2, characterized in that: It also includes a water supply tank (9) and a water storage tank (10), as well as a water pump (11). A first water guide pipe (12) is connected between the water supply tank (9) and the input end of the water pump (11). A second water guide pipe (13) is provided between the output end of the water pump (11) and one of the extension pipes (3). A third water guide pipe (14) is provided between the other extension pipe (3) and the water storage tank (10). A second flange (15) is provided at one end of the extension pipe (3), one end of the second water guide pipe (13), and one end of the third water guide pipe (14). A second bolt (16) and a second nut (17) are provided on the second flange (15). The extension pipe (3) is connected to the second water guide pipe (13), and the extension pipe (3) is connected to the third water guide pipe (14) through the cooperation of the second flange (15), the second bolt (16), and the second nut (17).

4. The anti-scaling and interference-free geothermal heat extraction device according to claim 1, characterized in that: The scale removal device (5) includes two receiving rods (51), a U-shaped rod (52) is provided between the two receiving rods (51), a scraper (53) is provided on the U-shaped rod (52), and protruding rods (54) are provided at both ends of the U-shaped rod (52) and are rotatably connected to the receiving rods (51). Impeller blades (55) are provided on the protruding rods (54).

5. The anti-scaling and interference-free geothermal heat extraction device according to claim 1, characterized in that: The outer surface of the extension tube (3) is covered with a heat insulation layer (18).

6. The anti-scaling and interference-free geothermal heat extraction device according to claim 4, characterized in that: The outer surface of the U-shaped tube (4) is provided with a third bolt (19), and both ends of the receiving rod (51) are provided with threaded holes (511) that are compatible with the third bolt (19). The receiving rod (51) is fixed in the U-shaped tube (4) by the cooperation of the third bolt (19) and the threaded holes (511). A first sealing rubber gasket (20) is provided between the two ends of the receiving rod (51) and the inner wall of the U-shaped tube (4).

7. The anti-scaling and interference-free geothermal heat extraction device according to claim 3, characterized in that: A second sealing rubber gasket (21) is provided between the first flanges (6), and a third sealing rubber gasket (22) is provided between the second flanges (15).

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