Righting and guiding device for geothermal source coaxial heat exchange well system

Abstract

The invention relates to the technical field of ground source direct utilization, in particular to a centralizing and guiding device for a ground source coaxial heat exchange well system. The righting flow guide assembly comprises a first connecting piece, a second connecting piece and a stabilizing piece; the first connecting piece and the second connecting piece are both arranged on the inner pipe, and the multiple stabilizing pieces are arranged in the circumferential direction of the inner pipe through the first connecting piece and the second connecting piece; after the stabilizing piece makes contact with the heat exchange medium, the stabilizing piece deforms to abut against the inner pipe and the outer pipe. The geothermal heat exchange well system has the effect of improving the heat exchange efficiency of the geothermal heat exchange well system.

Description

Technical Field

[0001] This application relates to the technical field of direct geothermal utilization, and in particular to a straightening and guiding device for a coaxial heat exchange well system of a geothermal source. Background Technology

[0002] Ground source heat pump systems utilize the relatively stable temperature resources of the earth as a heat source and cold source to provide heating, cooling, and domestic hot water for buildings. It is a highly efficient energy-saving technology. In ground source heat pump systems, As a core energy exchange component, the performance of the geothermal source coaxial heat exchange well system directly affects the overall efficiency of the system.

[0003] A geothermal coaxial heat exchange well system comprises a geothermal heat exchange well, an inner pipe, and an outer pipe, which are installed concentrically within the geothermal heat exchange well. A closed annular channel is formed between the inner and outer pipes to accommodate the circulating heat exchange medium (water or antifreeze). During system operation, the heat exchange medium circulates within a specific path formed by the inner and outer pipes. Simultaneously, the outer wall of the outer pipe is in direct contact with the surrounding soil, achieving heat exchange between the system and the ground through heat conduction, thereby providing a stable cold and heat source input for the ground source heat pump system.

[0004] Currently, the inner and outer pipes are typically buried in geothermal heat exchange wells by naturally hanging down under their own weight. This installation method easily leads to uneven spatial distribution of the annular channels between the inner and outer pipes. Uneven distribution of the annular channels results in excessively large or narrow gaps in the annular space, reducing the heat exchange efficiency of the heat exchange medium and thus affecting the working performance of the ground source heat pump system. Summary of the Invention

[0005] In order to improve the heat exchange efficiency of geothermal heat exchange well systems, this application provides a straightening and guiding device for coaxial heat exchange well systems of geothermal sources.

[0006] This application provides a centralizing and diverting device for a coaxial heat exchange well system of a geothermal source, which adopts the following technical solution: A centralizing and guiding device for a coaxial heat exchange well system of a geothermal source includes a centralizing and guiding assembly; the centralizing and guiding assembly includes a first connector, a second connector, and a stabilizing component; multiple stabilizing components are provided, the first and second connectors are both provided on an inner tube, and the multiple stabilizing components are arranged circumferentially along the inner tube through the first and second connectors; after the stabilizing component comes into contact with the heat exchange medium, the stabilizing component absorbs moisture and expands until it presses against the inner tube and the outer tube.

[0007] By adopting the above technical solution, the stabilizer does not absorb moisture and expand when installed on the inner tube, thus providing installation space for the inner tube to be installed into the outer tube, facilitating the installation of the inner tube into the outer tube, reducing the possibility of friction between the inner tube and the inner wall of the outer tube during the installation process, and thus improving the convenience of construction.

[0008] After the inner and outer tubes are installed, heat exchange medium is injected into the annular channel between them. When the heat exchange medium comes into contact with the stabilizing element, the stabilizing element can deform, thereby pressing against the outer wall of the inner tube and the inner wall of the outer tube. After the stabilizing element presses against the inner and outer tubes, it forms a stable support, keeping the inner and outer tubes coaxial and reducing the possibility of unevenness in the annular channel after the inner tube is installed.

[0009] Optionally, one end of the stabilizer is pressed against the inner tube by the first connector, and the other end is pressed against the inner tube by the second connector; the stabilizer is coiled around the inner tube along the length of the inner tube.

[0010] By adopting the above technical solution, the two ends of the stabilizer are fixed to the inner tube by the first and second connecting parts, respectively, thus achieving the fixation of the stabilizer's position. The stabilizer is coiled around the inner tube along its length. After the stabilizer deforms and expands to press against the inner and outer tubes, the heat exchange medium can flow around the circumference of the inner tube as it passes between adjacent stabilizers, thereby changing the flow path of the heat exchange medium. Since the temperature of the heat exchange medium varies depending on its distance from the outer tube wall, the flow of the heat exchange medium around the inner tube using multiple stabilizers can achieve a stirring effect, mixing heat exchange media of different temperatures, reducing the formation of a stable thermal boundary layer within the annular channel, and thus improving the heat exchange efficiency of the heat exchange medium.

[0011] Optionally, the angles between the two ends of the stabilizer and the first connector and the second connector are respectively the mounting angles, which are greater than or equal to 30° and less than 90°.

[0012] By adopting the above technical solution, there is an installation angle between the stabilizing block and the first or second connecting member, which allows the heat exchange medium to move around the inner tube circumferentially when passing between two adjacent stabilizing members, thereby realizing the mixing of heat exchange media at different temperatures and improving the heat exchange efficiency of the system.

[0013] Optionally, multiple straightening and guiding components are provided, including a first straightening and guiding component and a second straightening and guiding component, which are arranged adjacent to each other in sequence; the spiral directions of the first straightening and guiding component and the second straightening and guiding component around the inner tube are opposite.

[0014] By adopting the above technical solution, the first and second straightening and guiding components have opposite spiral directions around the inner tube. At the same time, the first and second straightening and guiding components are arranged adjacent to each other along the length of the inner tube, so that the stabilizing components of the first and second straightening and guiding components are misaligned along the length of the inner tube, thereby increasing the range of support for the outer tube.

[0015] Meanwhile, as the heat exchange medium passes through the first and second centralizing and guiding components in sequence, the direction of its flow around the inner tube can be changed, thereby further improving the stirring effect of mixing heat exchange media at different temperatures and improving the heat exchange efficiency of the system.

[0016] Optionally, the stabilizer is an expanded rubber.

[0017] By adopting the above technical solution, the elasticity of the expanded rubber allows the stabilizer to provide adaptive support at different positions on the inner cylinder, keeping the inner and outer tubes coaxial and maintaining the uniformity of the annular channel.

[0018] Meanwhile, during the circulation of the heat exchange medium, the outer and inner pipes will shake. The expanded rubber can buffer between the inner and outer pipes, reducing the risk of pipe structure damage caused by long-term shaking and extending the service life of the entire system.

[0019] Optionally, the first connecting member is a clamp or a wire, and the second connecting member is a clamp or a wire.

[0020] By adopting the above technical solution, the first connecting part is a clamp or wire, and the second connecting part is a clamp or wire, which makes it easy to fix the stabilizing part on the inner tube.

[0021] Optionally, the first connector is provided with a first mounting groove, and the second connector is provided with a second mounting groove; one end of the stabilizer is located in the first mounting groove, and the other end is located in the second mounting groove.

[0022] By adopting the above technical solution, the two ends of the stabilizer are located in the first mounting groove and the second mounting groove, respectively. The mounting groove can position the stabilizer, thereby improving the installation efficiency of the stabilizer.

[0023] Optionally, the straightening and guiding assembly further includes a locking element, with locking elements provided in both the first mounting slot and the second mounting slot; the locking element is used to restrict the movement of the stabilizing element.

[0024] By adopting the above technical solution, the locking component can restrict the mounting block within the mounting slot, reducing the possibility of the stabilizing component moving.

[0025] Optionally, the stabilizer is bonded to the inner tube.

[0026] By adopting the above technical solution, the stabilizer and the inner tube are bonded together, which further improves the stability of the stabilizer and reduces the possibility of the stabilizer moving.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. By installing a stabilizing element on the inner tube, the stabilizing element, after being installed on the inner tube, expands due to moisture absorption without contact with the heat exchange medium. This provides installation space for the inner tube to be installed into the outer tube, facilitating the installation and reducing the possibility of friction between the inner tube and the inner wall of the outer tube during installation, thus improving construction convenience. After the inner and outer tubes are installed, the heat exchange medium is injected into the annular channel between the inner and outer tubes. When the heat exchange medium comes into contact with the stabilizing element, the stabilizing element can deform, thereby pressing against the outer wall of the inner tube and the inner wall of the outer tube. After the stabilizing element presses against the inner and outer tubes, it forms a stable support, keeping the inner and outer tubes coaxial and reducing the possibility of unevenness in the annular channel after the inner tube is installed.

[0028] 2. The stabilizer is fixed to the inner tube at both ends by a first connector and a second connector, thus fixing its position. The stabilizer is coiled around the inner tube along its length. After the stabilizer deforms and expands, pressing against the inner and outer tubes, the heat exchange medium can flow circumferentially around the inner tube as it passes between adjacent stabilizers, thereby altering its flow path. Since the temperature of the heat exchange medium varies depending on its distance from the outer tube wall, the multiple stabilizers causing the medium to flow circumferentially around the inner tube create a stirring effect, mixing heat exchange media of different temperatures and reducing the formation of a stable thermal boundary layer within the annular channel, thereby improving the heat exchange efficiency.

[0029] 3. By using expanded rubber as the stabilizer, the stabilizer can adaptively support different positions in the annular channel, keeping the inner and outer tubes coaxial and maintaining the uniformity of the annular channel.

[0030] Meanwhile, during the circulation of the heat exchange medium, the outer and inner pipes will shake. The expanded rubber can buffer between the inner and outer pipes, reducing the risk of pipe structure damage caused by long-term shaking and extending the service life of the entire system. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of a centralizing and guiding device for a geothermal source coaxial heat exchange well system in this application; Figure 2 This is a schematic diagram of the structure of the first and second straightening and guiding components in Embodiment 1 of a straightening and guiding device for a geothermal source coaxial heat exchange well system according to this application; Figure 3 This is a schematic diagram of the stabilizing component before expansion in Embodiment 1 of the centralizing and guiding device for a geothermal source coaxial heat exchange well system of this application; Figure 4 This is a schematic diagram of the expanded structure of the stabilizing component in Embodiment 1 of the centralizing and guiding device for a geothermal source coaxial heat exchange well system of this application; Figure 5 This is a schematic diagram of the installation angle of Embodiment 1 of a centralizing and guiding device for a geothermal source coaxial heat exchange well system according to this application; Figure 6 This is a schematic diagram of the structure of the straightening and guiding component in Embodiment 2 of a straightening and guiding device for a geothermal source coaxial heat exchange well system of this application; Figure 7 This is a schematic diagram of the structure of the first and second connectors in Embodiment 3 of a straightening and guiding device for a geothermal source coaxial heat exchange well system according to this application.

[0032] In the figure: 1. Straightening and guiding component; 1a. First straightening and guiding component; 1b. Second straightening and guiding component; 11. First connector; 111. First mounting slot; 12. Second connector; 121. Second mounting slot; 13. Stabilizer; 14. Locking component; 2. Mounting angle; 3. Inner tube; 4. Outer tube. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1 - Appendix Figure 7 This application will be described in further detail.

[0034] Example 1 Embodiment 1 of this application discloses a centralizing and guiding device for a coaxial heat exchange well system of a geothermal source. For example... Figure 1 and Figure 2 As shown, the straightening and guiding device includes a straightening and guiding assembly 1, which includes a first connecting member 11, a second connecting member 12, and a stabilizing member 13. In this embodiment 1, the first connecting member 11 is a clamp, and the second connecting member 12 is a clamp. In some embodiments, the first connecting member 11 may be a wire, and the second connecting member 12 may be a wire.

[0035] Furthermore, such as Figure 3 and Figure 4As shown, the stabilizer 13 is made of expanding rubber, and the heat exchange medium is water. The expanding rubber expands and deforms upon contact with water until it presses firmly against the inner tube 3 and the outer tube 4. Because the inner tube 3 and outer tube 4 are installed in a naturally drooping manner, their central axes are prone to deviation, leading to unevenness in the annular channel between them. The expanding rubber is elastic; after the inner tube 3 is installed into the outer tube 4 and comes into contact with water, it absorbs moisture and expands. The stabilizers 13 at different positions on the inner tube 3 can adaptively support the inner tube 3, thereby straightening it and improving the uniformity of the annular channel.

[0036] Meanwhile, during the circulation of the heat exchange medium, the inner tube 3 will shake. The expanded rubber can buffer the inner tube 3 and the outer tube 4, reducing the risk of pipe structure damage caused by long-term shaking and extending the service life of the entire system.

[0037] In addition, the stabilizer 13 did not expand or deform when installed on the inner tube 3, thus providing installation space for the inner tube 3 to be installed into the outer tube 4, making it easier for the inner tube 3 to be installed into the outer tube 4, reducing the possibility of friction between the inner tube 3 and the inner wall of the outer tube 4 during installation, thereby improving the convenience of construction.

[0038] like Figure 2 and Figure 3 As shown, in this embodiment 1, three stabilizers 13 are provided, and the three stabilizers 13 are evenly arranged along the circumference of the inner tube. During installation, the first connector 11 and the second connector 12 respectively press the two ends of the stabilizer 13 against the inner tube 3, thereby fixing the stabilizer 13 on the inner tube. At the same time, adhesive bonding is performed between the stabilizer 13 and the inner tube 3 to further improve the stability of the connection between the stabilizer 13 and the inner tube 3 and reduce the possibility of the stabilizer 13 moving.

[0039] like Figure 5 As shown, the two ends of the stabilizer 13 are respectively connected to the first connector 11 and the second connector 12 at an installation angle 2, which is greater than or equal to 30° and less than 90°, preferably 60°. Meanwhile, the stabilizer 13 is coiled around the inner tube 3 along its length.

[0040] It should be noted that, as Figure 5As shown, in this embodiment 1, multiple straightening and guiding components 1 are provided, including a first straightening and guiding component 1a and a second straightening and guiding component 1b, which are arranged adjacent to each other in sequence. The first straightening and guiding components 1a and the second straightening and guiding components 1b have opposite spiral directions around the inner tube 3, causing the stabilizing elements 13 in the first straightening and guiding component 1a and the second straightening and guiding component 1b to be misaligned along the length of the inner tube 3. The adjacent arrangement of the first straightening and guiding components 1a and the second straightening and guiding components 1b, and the misalignment of the stabilizing elements 13, increases the support range of the multiple straightening and guiding components 1 for the outer tube 4.

[0041] At the same time, such as Figure 5 As shown, the three stabilizers 13 are all coiled around the inner tube 3 along its length, allowing the heat exchange medium to flow around the inner tube 3 circumferentially when passing through the gap between two stabilizers 13 in a centralizing and guiding assembly 1, thereby changing the flow path of the heat exchange medium. The temperature of the heat exchange medium varies depending on its distance from the outer tube 4 wall. The stabilizers 13, by causing the heat exchange medium to flow around the inner tube 3 circumferentially, can agitate the medium, mixing heat exchange media of different temperatures, reducing the formation of a stable thermal boundary layer within the annular channel, and thus improving the heat exchange efficiency of the heat exchange medium.

[0042] In addition, when the heat exchange medium passes through the first centralizing and guiding component 1a and the second centralizing and guiding component 1b in sequence, the direction of flow around the inner tube 3 can be changed respectively, thereby further improving the stirring effect of mixing heat exchange media at different temperatures and improving the heat exchange efficiency of the system.

[0043] The implementation principle of a centralizing and diverting device for a geothermal source coaxial heat exchange well system in Embodiment 1 of this application is as follows: Before installing the inner tube 3 into the outer tube 4, the two ends of the three stabilizing components 13 are pressed against the inner tube 3 by the first connector 11 and the second connector 12, so that the three stabilizing components 13 are evenly fixed on the inner tube 3 along its circumference. At the same time, the first straightening and guiding assembly 1a and the second straightening and guiding assembly 1b are installed sequentially along the length of the inner tube 3. After the straightening and guiding assembly 1 is installed, the inner tube 3 is installed into the outer tube 4.

[0044] After the inner tube 3 is installed and filled with heat exchange medium, the stabilizer 13 expands and deforms after contacting the heat exchange medium, thereby pressing against the outer tube 4 and the inner tube 3, thus straightening the inner tube 3, reducing the uniformity of the annular channel, and thus improving the heat exchange efficiency of the heat exchange well system.

[0045] Meanwhile, as the heat exchange medium passes through the first centralizing and guiding component 1a and the second centralizing and guiding component 1b in sequence, the flow direction changes, causing the heat exchange medium to flow around the inner tube 3 in a circumferential direction, thereby creating a stirring effect of heat exchange medium at different temperatures, which further improves the heat exchange efficiency of the heat exchange well system.

[0046] Example 2 The difference between Embodiment 2 and Embodiment 1 of this application is as follows: like Figure 6 and Figure 7 As shown, the first connector 11 is provided with a first mounting groove 111, and the second connector 12 is provided with a second mounting groove 121; the two ends of the stabilizer 13 are respectively located in the first mounting groove 111 and the second mounting groove 121. By providing the first mounting groove 111 and the second mounting groove 121, after the first connector 11 and the second connector 12 are installed in the designated positions, the first mounting groove 111 and the second mounting groove 121 can provide positioning during the installation of the stabilizer 13, thereby improving installation efficiency.

[0047] Furthermore, such as Figure 7 As shown, the straightening and guiding assembly 1 also includes a locking member 14. After the two ends of the stabilizer 13 are respectively located in the first mounting groove 111 and the second mounting groove 121, the locking member 14 locks the two ends of the stabilizer 13, thereby reducing the possibility of the stabilizer 13 moving. Preferably, the locking member 14 is a bolt.

[0048] The implementation principle of a centralizing and diverting device for a geothermal source coaxial heat exchange well system in Embodiment 2 of this application is as follows: When installing the stabilizer 13, after installing the first connector 11 and the second connector 12 at the designated positions on the inner tube, the two ends of the stabilizer 13 are respectively installed into the first mounting groove 111 and the second mounting groove 121, and locked with the locking member 14 to complete the installation of the stabilizer 13.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A centralizing and diverting device for a coaxial heat exchange well system of a geothermal source, characterized in that, The system includes a flow guiding component (1); the flow guiding component (1) includes a first connector (11), a second connector (12) and a stabilizer (13); multiple stabilizers (13) are provided, the first connector (11) and the second connector (12) are both provided on the inner tube (3), and multiple stabilizers (13) are provided along the circumference of the inner tube (3) through the first connector (11) and the second connector (12); after the stabilizer (13) comes into contact with the heat exchange medium, the stabilizer (13) absorbs moisture and expands to press against the inner tube (3) and the outer tube (4).

2. A centralizing and diverting device for a coaxial heat exchange well system of a geothermal source according to claim 1, characterized in that, One end of the stabilizer (13) is pressed against the inner tube (3) by the first connector (11), and the other end is pressed against the inner tube (3) by the second connector (12); the stabilizer (13) is coiled around the inner tube (3) along the length direction of the inner tube (3).

3. A centralizing and diverting device for a coaxial heat exchange well system of a geothermal source according to claim 1, characterized in that, The angle between the two ends of the stabilizer (13) and the first connector (11) and the second connector (12) is the installation angle (2), which is greater than or equal to 30° and less than 90°.

4. A centralizing and diverting device for a coaxial heat exchange well system of a geothermal source according to claim 3, characterized in that, The straightening and guiding component (1) is provided in multiple ways, including a first straightening and guiding component (1a) and a second straightening and guiding component (1b), which are arranged adjacent to each other in sequence; the first straightening and guiding component (1a) and the second straightening and guiding component (1b) are in opposite spiral directions around the inner tube (3).

5. A centralizing and diverting device for a coaxial heat exchange well system of a geothermal source according to claim 1, characterized in that, The stabilizer (13) is an expanded rubber.

6. A centralizing and diverting device for a coaxial heat exchange well system of a geothermal source according to claim 1, characterized in that, The first connector (11) is a clamp or wire, and the second connector (12) is a clamp or wire.

7. A centralizing and diverting device for a coaxial heat exchange well system of a geothermal source according to claim 1, characterized in that, The first connector (11) is provided with a first mounting groove (111), and the second connector (12) is provided with a second mounting groove (121); one end of the stabilizer (13) is located in the first mounting groove (111), and the other end is located in the second mounting groove (121).

8. A centralizing and diverting device for a coaxial heat exchange well system of a geothermal source according to claim 7, characterized in that, The straightening and guiding component (1) also includes a locking element (14), and a locking element (14) is provided in both the first mounting groove (111) and the second mounting groove (121); the locking element (14) is used to restrict the movement of the stabilizer (13).

9. A centralizing and diverting device for a coaxial heat exchange well system of a geothermal source according to claim 1, characterized in that, The stabilizer (13) is bonded to the inner tube (3).

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