A geothermal well enhanced heat exchange tube bundle structure

Abstract

This utility model discloses an enhanced heat exchange tube bundle structure for geothermal wells, relating to the field of geothermal well technology. The utility model includes a medium inlet pipe, a medium outlet pipe below the medium inlet pipe, and connectors that are movably snapped onto one side of both the medium inlet and outlet pipes. Connecting components are provided between the medium inlet and outlet pipes and their corresponding connectors. A heat exchange tube bundle assembly is provided between the medium inlet and outlet pipes. This application, by setting up the heat exchange tube bundle assembly and adopting a simple-shaped, staggered arrangement of double heat exchange tubes, abandons complex bending forms. This not only increases the heat exchange area and improves the heat exchange capacity but also avoids local resistance losses caused by eddies and turbulence at bends, achieving a significant improvement in overall heat exchange efficiency. By setting up the connecting components, the connectors are movably installed on the heat exchange tube bundle structure, allowing for quick replacement of adaptable connectors according to different equipment interface requirements.

Description

Technical Field

[0001] This utility model relates to the field of geothermal well technology, specifically to a geothermal well enhanced heat exchange tube bundle structure. Background Technology

[0002] Geothermal energy, as a clean and renewable energy source, is playing an increasingly important role in the global energy structure. Especially in the development of medium-deep geothermal resources, efficient extraction of geothermal energy has become a key issue. Currently, geothermal well heat exchange is mainly achieved through the flow of heat exchange media within the well casing, exchanging heat with the formation.

[0003] However, existing geothermal well enhanced heat exchanger tube bundle structures still have some problems in use:

[0004] First, existing heat exchanger tube bundle structures often use heat exchanger tubes with complex shapes for heat exchange. The bends of the complex heat exchanger tubes are prone to generating eddies and turbulence, which leads to increased local resistance loss and weakens the overall heat exchange efficiency.

[0005] Secondly, the joints connecting the existing heat exchanger tube bundle structure and the heat exchanger device are mostly fixed. This fixed installation method makes it difficult to flexibly replace the appropriate joints according to the actual situation, thus reducing the flexibility of its structural use. Utility Model Content

[0006] To address the problems of high heat exchange resistance, low heat exchange efficiency, and inconvenient replacement due to fixed joint installation of existing complex-shaped heat exchange tubes, the purpose of this utility model is to provide a structure for enhanced heat exchange tube bundles in geothermal wells.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a geothermal well enhanced heat exchange tube bundle structure, including a medium inlet pipe, a medium outlet pipe provided below the medium inlet pipe, a connector movably snapped onto one side of both the medium inlet pipe and the medium outlet pipe, a connecting assembly provided between the medium inlet pipe and the medium outlet pipe and the corresponding connector, a heat exchange tube bundle assembly provided between the medium inlet pipe and the medium outlet pipe, the heat exchange tube bundle assembly including a first heat exchange tube, the first heat exchange tube being connected to the lower surface of the medium inlet pipe, the end of the first heat exchange tube facing away from the medium inlet pipe being connected to the lower surface of the medium outlet pipe, a first transfer pipe and a second transfer pipe respectively connected to one side of the medium inlet pipe and the medium outlet pipe, and a second heat exchange tube connected between the first transfer pipe and the second transfer pipe.

[0008] Preferably, the connecting assembly includes a connector, the outer surface of which is fixedly connected with a retaining plate in an annular array, the inner wall of the medium inlet pipe has a retaining groove in an annular array, the retaining plate is movably engaged with the retaining groove, a groove is formed on one side of the medium inlet pipe, a limiting ring for use with the retaining plate is movably engaged on the inner wall of the groove, a connecting plate is symmetrically fixedly connected to one side of the limiting ring, and a bolt is threadedly connected between the outer surface of the medium inlet pipe and the connecting plate.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] 1. This application sets up a heat exchange tube bundle assembly and adopts a simple double heat exchange tube staggered arrangement structure, abandoning the complex bending shape. This not only increases the heat exchange capacity by increasing the heat exchange area, but also avoids the local resistance loss caused by eddies and turbulence at the bend, thus achieving a significant improvement in overall heat exchange efficiency.

[0011] 2. By setting up a connection component, this application allows the connector to be movably installed on the heat exchange tube bundle structure, which enables quick replacement of the adapter connector according to the interface requirements of different equipment, effectively improving the flexibility of its structure. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the heat exchange tube bundle assembly of this utility model.

[0015] Figure 3 This is a schematic diagram of the exploded structure of the connecting component of this utility model.

[0016] In the diagram: 1. Medium inlet pipe; 2. Heat exchanger tube bundle assembly; 21. First adapter pipe; 22. Fixing sleeve; 23. Second heat exchanger tube; 24. Second adapter pipe; 25. First heat exchanger tube; 3. Connecting assembly; 31. Groove; 32. Limiting ring; 33. Connecting plate; 34. Bolt; 35. Clamping plate; 36. Clamping groove; 37. Positioning groove; 4. Medium outlet pipe; 5. Connector. Detailed Implementation

[0017] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example: Figure 1-3 As shown, this utility model provides a geothermal well enhanced heat exchange tube bundle structure, including a medium inlet pipe 1, and a medium outlet pipe 4 below the medium inlet pipe 1. By setting the medium inlet pipe 1 and the medium outlet pipe 4, a channel foundation for medium circulation is formed, providing a path for geothermal energy exchange. A connector 5 is movably snapped onto one side of the medium inlet pipe 1 and the medium outlet pipe 4. A connecting component 3 is provided between the medium inlet pipe 1 and the medium outlet pipe 4 and the corresponding connector 5. The movably snapped connector 5 cooperates with the connecting component 3 to facilitate flexible replacement of connectors 5 of different specifications according to actual working conditions, improving the flexibility of the structure. A heat exchange tube bundle assembly 2 is provided between the medium inlet pipe 1 and the medium outlet pipe 4, adopting a simple double heat exchange tube staggered arrangement structure to achieve a significant improvement in overall heat exchange efficiency.

[0019] The heat exchange tube bundle assembly 2 includes a first heat exchange tube 25, which is connected to the lower surface of the medium inlet tube 1. The end of the first heat exchange tube 25 facing away from the medium inlet tube 1 is connected to the lower surface of the medium outlet tube 4. A first transfer tube 21 and a second transfer tube 24 are respectively connected to one side of the medium inlet tube 1 and the medium outlet tube 4. The first transfer tube 21 and the second transfer tube 24 serve as a connection and transition to ensure smooth flow of the medium between different heat exchange tubes.

[0020] A second heat exchange tube 23 is provided between the first transfer tube 21 and the second transfer tube 24. The cross-sectional shape of the first heat exchange tube 25 and the second heat exchange tube 23 is U-shaped. Compared with complex curved shapes, the U-shaped design of the first heat exchange tube 25 and the second heat exchange tube 23 reduces the generation of eddies and turbulence at the fluid turning point and reduces local resistance loss. At the same time, the staggered arrangement of the U-shaped structures increases the heat exchange area in a limited space and significantly improves the overall heat exchange efficiency.

[0021] A fixing sleeve 22 is fitted onto the outer surfaces of the first heat exchange tube 25 and the second heat exchange tube 23. The fixing sleeve 22 is fitted onto the outer surfaces of the first heat exchange tube 25 and the second heat exchange tube 23, and provides a fixed support for the two heat exchange tubes, thereby enhancing the structural stability of the heat exchange tube bundle assembly 2. The first heat exchange tube 25, the second heat exchange tube 23, the first transfer tube 21, and the second transfer tube 24 are all copper tubes. Copper tubes are used as the material for the first heat exchange tube 25, the second heat exchange tube 23, the first transfer tube 21, and the second transfer tube 24. The good thermal conductivity of copper tubes is utilized to further improve the heat transfer efficiency and optimize the heat exchange effect.

[0022] The connecting component 3 includes a connector 5. A retaining plate 35 is fixedly connected to the outer surface of the connector 5 in an annular array. A retaining groove 36 is formed in an annular array on the inner wall of the medium inlet pipe 1. The retaining plate 35 is movably engaged with the retaining groove 36. The retaining plate 35 on the outer surface of the connector 5 is movably engaged with the retaining groove 36 on the inner wall of the medium inlet pipe 1, which realizes the initial installation and positioning of the connector 5, which is convenient and quick. A groove 31 is formed on one side of the medium inlet pipe 1. A limiting ring 32 that works with the retaining plate 35 is movably engaged on the inner wall of the groove 31. The limiting ring 32 engages with the groove 31 and works with the retaining plate 35 to axially limit the connector 5 after installation, preventing the connector 5 from loosening and falling off.

[0023] A connecting plate 33 is symmetrically fixedly connected to one side of the limiting ring 32. A positioning groove 37 for use with the connecting plate 33 is opened on the outer surface of the medium inlet pipe 1. The connecting plate 33 is movably engaged with the positioning groove 37. A bolt 34 is threadedly connected between the outer surface of the medium inlet pipe 1 and the connecting plate 33. The connecting plate 33 is engaged with the positioning groove 37 and then fixed by the threaded connection of the bolt 34, which further enhances the firmness and stability of the connection between the joint 5 and the medium inlet pipe 1. This movable connection design allows the joint 5 to be quickly disassembled and replaced according to actual needs, effectively improving the flexibility of the heat exchange tube bundle structure. There are two connecting components 3. The internal structures of the two connecting components 3 are the same, which facilitates the universality of the internal structures of the two connecting components 3.

[0024] Working principle: First, the connector 5 is connected to the medium inlet pipe 1 and the medium outlet pipe 4 through the connecting component 3.

[0025] The retaining plate 35 on the outer surface of connector 5 engages with the retaining groove 36 on the inner wall of the medium inlet pipe 1 for initial positioning. Then, the limiting ring 32 is inserted into the groove 31 on one side of the medium inlet pipe 1, cooperating with the retaining plate 35 to provide axial positioning and prevent connector 5 from loosening. After the connecting plate 33 on one side of the limiting ring 32 engages with the positioning groove 37 on the outer surface of the medium inlet pipe 1, it is tightened by bolts 34 to ensure a firm connection.

[0026] Meanwhile, the connection steps of connector 5 and medium discharge pipe 4 are the same, and the appropriate connector 5 can be flexibly replaced according to the actual working conditions to ensure that the medium can flow smoothly into and out of the heat exchange tube bundle structure.

[0027] Next, the fitting connector 5 is connected to the heat exchange device. After the medium enters, it flows in from the medium inlet pipe 1 and begins the heat exchange process through the first heat exchange pipe 25. The first transfer pipe 21 and the second transfer pipe 24 serve as transfer connections.

[0028] Both the first heat exchange tube 25 and the second heat exchange tube 23 are U-shaped copper tubes. The U-shaped design reduces eddies and turbulence at the fluid bends, lowers local resistance losses, and the staggered arrangement increases the heat exchange area.

[0029] When the medium flows in the first heat exchange tube 25, it exchanges heat with the heat source in the geothermal well. Then it flows out from the medium discharge pipe 4 through the first heat exchange tube 25 and the second transfer pipe 24, completing the entire heat exchange cycle. In this process, the good thermal conductivity of the copper tube can quickly conduct heat and improve the heat exchange efficiency.

[0030] In addition, the fixing sleeve 22, which is fitted together on the outer surface of the first heat exchange tube 25 and the second heat exchange tube 23, provides a fixed support for the two heat exchange tubes, enhances the structural stability of the heat exchange tube bundle assembly 2, and ensures that the heat exchange tube bundle assembly 2 can remain stable during the flow of the medium and heat exchange process, thus ensuring the continuous and efficient heat exchange.

[0031] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A geothermal well enhanced heat exchange tube bundle structure, comprising a medium inlet pipe (1), characterized in that: A medium discharge pipe (4) is provided below the medium inlet pipe (1). A connector (5) is movably snapped onto one side of both the medium inlet pipe (1) and the medium discharge pipe (4). A connecting assembly (3) is provided between the medium inlet pipe (1) and the medium discharge pipe (4) and the corresponding connector (5). A heat exchange tube bundle assembly (2) is provided between the medium inlet pipe (1) and the medium discharge pipe (4). The heat exchange tube bundle assembly (2) includes a first heat exchange tube (25), which is connected to the lower surface of the medium inlet tube (1). The end of the first heat exchange tube (25) facing away from the medium inlet tube (1) is connected to the lower surface of the medium outlet tube (4). A first transfer tube (21) and a second transfer tube (24) are respectively connected to one side of the medium inlet tube (1) and the medium outlet tube (4). A second heat exchange tube (23) is connected between the first transfer tube (21) and the second transfer tube (24).

2. The enhanced heat exchange tube bundle structure for a geothermal well as described in claim 1, characterized in that: The connecting component (3) includes a connector (5), and a retaining plate (35) is fixedly connected to the outer surface of the connector (5) in an annular array. The inner wall of the medium inlet pipe (1) is provided with a retaining groove (36) in an annular array. The retaining plate (35) is movably engaged with the retaining groove (36). A groove (31) is provided on one side of the medium inlet pipe (1). A limiting ring (32) that works with the retaining plate (35) is movably engaged on the inner wall of the groove (31). A connecting plate (33) is symmetrically fixedly connected to one side of the limiting ring (32). A bolt (34) is threadedly connected between the outer surface of the medium inlet pipe (1) and the connecting plate (33).

3. The enhanced heat exchange tube bundle structure for a geothermal well as described in claim 1, characterized in that: The first heat exchange tube (25), the second heat exchange tube (23), the first transfer tube (21), and the second transfer tube (24) are all copper tubes.

4. The enhanced heat exchange tube bundle structure for a geothermal well as described in claim 1, characterized in that: The cross-sectional shape of the first heat exchange tube (25) and the second heat exchange tube (23) is U-shaped.

5. The enhanced heat exchange tube bundle structure for a geothermal well as described in claim 1, characterized in that: The outer surfaces of the first heat exchange tube (25) and the second heat exchange tube (23) are fitted with a fixing sleeve (22).

6. The enhanced heat exchange tube bundle structure for a geothermal well as described in claim 2, characterized in that: The outer surface of the medium inlet pipe (1) is provided with a positioning groove (37) for use with the connecting plate (33), and the connecting plate (33) is movably engaged with the positioning groove (37).

7. The enhanced heat exchange tube bundle structure for a geothermal well as described in claim 2, characterized in that: The connecting component (3) is provided in two sets, and the internal structure of the two sets of connecting components (3) is the same.

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