Shallow geothermal energy ground buried pipe

Abstract

The utility model relates to the technical field of shallow geothermal energy, and concretely relates to a shallow geothermal energy buried pipe, which comprises a buried pipe assembly, a sealing base and a sealing cover, the bottom of the buried pipe assembly is provided with the sealing base, and the top of the buried pipe assembly is provided with the sealing cover, the buried pipe assembly comprises an outer pipe and an inner pipe, the outer pipe is sleeved with the inner pipe, a spiral flow guide plate is arranged between the outer pipe and the inner pipe, and the outer surface of the inner pipe is provided with micropores, the medium flow path can be prolonged, the heat exchange area is increased, the heat exchange efficiency is improved, and the use effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of shallow geothermal energy technology, specifically to a shallow geothermal energy buried pipe. Background Technology

[0002] Shallow geothermal energy, also known as shallow geothermal energy, refers to the thermal energy that is stored in the soil, groundwater, and surface water at a certain depth below the Earth's surface and has development and utilization value. Ground source heat pump systems are the main way to develop and utilize shallow geothermal energy, which exchange heat with the soil and rock through buried underground pipe heat exchangers.

[0003] Currently, when using buried pipes, the heat exchange of existing buried pipes mainly relies on the conduction between the pipe wall and the backfill material and the surrounding soil and rock, and the convective heat exchange effect is not strong. Moreover, the traditional U-shaped inlet and outlet water pipes are close to each other, causing heat interference and reducing the effective heat exchange temperature difference. Therefore, a shallow geothermal energy buried pipe is proposed to extend the medium flow path, increase the heat exchange area, improve the heat exchange efficiency, and thus improve the use effect. Utility Model Content

[0004] To address the problems in existing technologies, this utility model provides a shallow geothermal energy buried pipe, which extends the medium flow path, increases the heat exchange area, improves heat exchange efficiency, and thus enhances the performance.

[0005] The technical solution adopted by this utility model to solve its technical problem is a shallow geothermal energy buried pipe, including a buried pipe assembly, a sealing base and a sealing cover. The bottom of the buried pipe assembly is provided with a sealing base and the top of the buried pipe assembly is provided with a sealing cover. The underground pipe assembly includes an outer pipe and an inner pipe, with the outer pipe sleeved over the inner pipe. A spiral guide plate is provided between the outer pipe and the inner pipe, and micropores are provided on the outer surface of the inner pipe.

[0006] By adopting the above technical solution, the convective heat transfer between the fluid and the inner wall of the main pipe is enhanced, thereby improving the heat transfer efficiency.

[0007] Specifically, ribs are provided at equal intervals on the outer periphery of the outer tube.

[0008] Specifically, the outer tube includes a spiral ascending channel.

[0009] Specifically, a descending channel is provided inside the inner tube, and heat-conducting meshes are arranged at equal intervals inside the descending channel.

[0010] Specifically, the top of the sealing cap is provided with an inlet connector, which is connected to the descending channel, and one side of the sealing cap is provided with an outlet connector, which is connected to the outer pipe.

[0011] The beneficial effects of this utility model are: The shallow geothermal energy buried pipe of this utility model, through an outer pipe, an inner pipe, a spiral guide plate and micropores, causes the fluid to slowly and continuously mix and turbulent between the rising channels due to the spiral structure under the action of centrifugal force and pressure difference. The internal turbulence greatly enhances the convective heat transfer between the fluid and the inner wall of the main pipe, thereby improving the heat transfer efficiency.

[0012] The shallow geothermal energy buried pipe of this utility model greatly increases the contact area between the buried pipe and the external backfill material and soil through the setting of the outer pipe and rib plate, which enhances the heat conduction with the surrounding soil, reduces the contact thermal resistance, and thus improves the external heat exchange efficiency. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the underground pipe assembly structure of this utility model; Figure 3 This is a schematic diagram of the inner tube structure of this utility model; Figure 4 This is a top view of the underground pipe assembly of this utility model; Figure 5 This is a cross-sectional view of the sealing cap of this utility model; In the diagram: 1. Buried pipe assembly; 2. Sealing base; 3. Sealing cap; 301. Inlet connector; 302. Outlet connector; 4. Outer pipe; 401. Spiral rising channel; 5. Inner pipe; 501. Falling channel; 502. Micropores; 503. Heat-conducting mesh; 6. Spiral guide plate; 7. Rib plate. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0016] To facilitate extending the medium flow path, increase the heat exchange area, and improve heat exchange efficiency, thereby enhancing the performance, such as... Figure 1-3 As shown, the shallow geothermal energy buried pipe of this utility model includes a buried pipe assembly 1, a sealing base 2 and a sealing cap 3. The bottom of the buried pipe assembly 1 is provided with the sealing base 2 and the top of the buried pipe assembly 1 is provided with the sealing cap 3. The underground pipe assembly 1 includes an outer pipe 4 and an inner pipe 5, with the outer pipe 4 sleeved on the inner pipe 5. A spiral guide plate 6 is provided between the outer pipe 4 and the inner pipe 5, and micropores 502 are provided on the outer surface of the inner pipe 5.

[0017] During use, the medium spirals and rises within the spiral channel, greatly extending the flow path and heat exchange time. The spiral motion also generates disturbances, enhancing heat exchange with the pipe wall.

[0018] The inner tube 5 is shorter than the outer tube 4, and both the outer tube 4 and the inner tube 5 are made of polyethylene.

[0019] To improve external heat exchange efficiency, for example, such as Figure 1 , Figure 2 As shown, the present invention also includes ribs 7 evenly spaced on the outer periphery of the outer tube 4.

[0020] When in use, the rib plate 7 increases the contact area between the buried pipe and the surrounding backfill material and soil, effectively reducing the contact thermal resistance and promoting the conduction of heat between the pipe wall and the surrounding rock and soil. The rib plate 7 is made of polyethylene.

[0021] For example, such as Figure 2 As shown, the present invention also includes an outer tube 4 comprising a spiral rising channel 401.

[0022] When in use, the spiral rising channel 401 is formed by the spiral guide plate 6, the outer tube 4, and the inner tube 5 together, which forces the medium to flow a long distance along the spiral path, which not only prolongs the heat exchange time, but also enhances the fluid disturbance due to centrifugal effect, thereby improving the internal convective heat transfer intensity.

[0023] For example, such as Figure 3 , 4 As shown, the present invention also includes a descending channel 501 provided inside the inner tube 5, and heat-conducting meshes 503 are equidistantly arranged inside the descending channel 501.

[0024] In use, the descending channel 501 provides a flow path for the medium to reach the bottom. The heat-conducting mesh 503 arranged at equal intervals inside can not only disturb the medium flowing through this channel and enhance its initial heat exchange with the inner tube 5 wall, but also the mesh itself, made of high thermal conductivity material, can also serve as a reinforcing rib for heat transfer, improving the overall thermal conductivity. The heat-conducting mesh 503 is made of copper.

[0025] For example, such as Figure 5 As shown, the present invention also includes an inlet connector 301 at the top of the sealing cover 3, which is connected to the descending channel 501, and an outlet connector 302 on one side of the sealing cover 3, which is connected to the outer tube 4.

[0026] In use, the inlet connector 301 and the outlet connector 302 serve as the inlet and outlet for media circulation, respectively. They are compact in structure and easy to connect. The sealing cap 3 ensures the sealing of the top of the entire buried pipe assembly, preventing impurities from entering and media from leaking.

[0027] In use, the circulating medium enters the descending channel 501 through the inlet connector 301 and reaches the bottom of the pipe. During the descent, the medium undergoes preliminary heat exchange with the inner pipe wall 5 and the heat-conducting mesh 503. Upon reaching the bottom, the medium is evenly distributed through the micropores 502 on the inner pipe wall and enters the spiral ascending channel 401. During the spiral ascending process, the medium has a long flow path and strong turbulence, resulting in sufficient heat exchange with the inner and outer pipe walls. At the same time, the ribs 7 on the outer wall of the outer pipe 4 enhance the heat conduction with the external soil. Finally, the medium that has completed the heat exchange flows out from the outlet connector 302, thus efficiently realizing the function of extracting heat from the ground or discharging heat to the ground.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A shallow geothermal energy buried pipe, characterized in that, It includes a buried pipe assembly (1), a sealing base (2) and a sealing cap (3). The bottom of the buried pipe assembly (1) is provided with a sealing base (2) and the top of the buried pipe assembly (1) is provided with a sealing cap (3). The underground pipe assembly (1) includes an outer pipe (4) and an inner pipe (5), with the outer pipe (4) sleeved on the inner pipe (5). A spiral guide plate (6) is provided between the outer pipe (4) and the inner pipe (5), and micropores (502) are provided on the outer surface of the inner pipe (5).

2. The shallow geothermal energy buried pipe according to claim 1, characterized in that, The outer tube (4) is provided with ribs (7) at equal intervals on its outer periphery.

3. The shallow geothermal energy buried pipe according to claim 1, characterized in that, The outer tube (4) includes a spiral rising channel (401).

4. The shallow geothermal energy buried pipe according to claim 1, characterized in that, The inner tube (5) has a descending channel (501) inside, and heat-conducting meshes (503) are arranged at equal intervals inside the descending channel (501).

5. A shallow geothermal energy buried pipe according to claim 4, characterized in that, The top of the sealing cover (3) is provided with an inlet connector (301), and the inlet connector (301) is connected to the descending channel (501). The side of the sealing cover (3) is provided with an outlet connector (302), and the outlet connector (302) is connected to the outer tube (4).

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