Efficient heat exchange buried pipe device applied to shallow geothermal energy
By introducing protective outer pipes and thermal conductivity mechanisms into the shallow geothermal energy heat exchange buried pipe device, the problem of damage to the outer pipe is solved, efficient heat transfer and compression resistance are improved, the device life is extended and maintenance costs are reduced.
Patent Information
- Application Number
- CN202422692333.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-06
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-11-06
AI Technical Summary
When facing soil stability problems, the outer pipes of shallow geothermal energy heat exchange buried pipes are susceptible to damage, resulting in reduced heat exchange efficiency, shortened life and increased maintenance costs, and the thermal conduction block cannot buffer or disperse the pressure of the outer pipe.
A device including protecting the outer tube and a thermal conductivity mechanism is designed. Through the cooperation of structures such as the ring support block, thermal main block, telescopic thermal conduction plate, etc., the heat shunt is accelerated, and the pressure is buffered and dispersed under external pressure to improve the compressive resistance.
It improves heat transfer efficiency, extends the service life of the device, reduces maintenance costs, and enhances the compressive performance and stability of the device.
Smart Images
Figure CN223295047U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of underground thermal energy application, in particular to a high-efficiency heat exchange buried pipe device applied to shallow geothermal energy. Background Art
[0002] The high-efficiency heat exchange buried pipe device for shallow geothermal energy mainly consists of two layers of inner and outer casings, forming an annular space. The inner pipe is used to transport the working fluid (such as water or refrigerant), while the outer pipe is in direct contact with the underground soil or rock to achieve heat exchange. This special structure enables the device to achieve efficient heat energy transfer in a limited space.
[0003] In systems that use inner pipes to transport water underground for heat exchange, designers often place heat transfer blocks in the annular gap between the inner and outer pipes to overcome thermal resistance and improve heat exchange efficiency. These blocks effectively promote heat transfer between the pipes and the soil, significantly enhancing the system's heat exchange performance.
[0004] However, in the face of possible stability issues of the soil in shallow geological environments, such as natural phenomena such as displacement and settlement, these geological changes will exert additional pressure on the buried pipes. Although the heat conductive blocks play a positive role in heat conduction, they do not have the function of buffering or dispersing the pressure on the outer pipe. Therefore, when the pressure of the soil on the outer pipe gradually increases, the outer pipe may be damaged or even broken due to lack of adequate protection. Once the outer pipe is broken, the buried pipe fluid exposed to the external environment for a long time is not only susceptible to contamination and corrosion, but also accelerates the aging process of the pipeline material, further damaging the pipeline structure. This chain reaction not only reduces the heat exchange efficiency of the system, but also greatly shortens the service life of the entire geothermal exchange device, increasing maintenance costs and replacement frequency. Utility Model Content
[0005] The present invention aims to solve the problems existing in the prior art and provides the following technical solutions: a high-efficiency heat exchange buried pipe device for shallow geothermal energy, comprising a protective outer pipe, a circular support block fixedly mounted on the inner ring surface of the protective outer pipe, a conveying inner pipe fixedly mounted on the inner ring surface of the circular support block, a heat conduction mechanism for accelerating heat exchange efficiency provided on the front side of the circular support block, an arc support plate fixedly mounted on one side of the heat conduction mechanism, a shunt contact block fixedly mounted on the inner wall of the protective outer pipe, one side of the shunt contact block being in contact with one side of the heat conduction mechanism, and the heat conduction mechanism being in contact with the inner wall of the protective outer pipe. A fixing block is fixedly installed on the end of the arc support plate away from the center of the circle, and a rubber pad is fixedly installed on the side of the fixing block close to the protective outer tube. The rubber pad fits the inner wall of the protective outer tube. When the heat conduction mechanism accelerates heat exchange, structures such as the shunt contact block cooperate with the heat conduction mechanism to perform shunt and accelerated transfer, thereby improving the overall heat transfer efficiency. When additional pressure is applied to the soil outside the protective outer tube, the pressure is buffered by the cooperation of the fixing block and the heat conduction mechanism, and part of the pressure is also dispersed to different positions of the conveying inner tube, thereby improving the overall pressure resistance of the protective outer tube.
[0006] As an improvement of the above technical solution, the heat conduction mechanism includes a heat conduction main block, which is fixedly mounted on the front side of the circular support block, and the left side of the heat conduction main block is fixedly mounted on the arc support plate. A limiting slot is provided on the side of the heat conduction main block away from the center of the circle, and the limiting slot is movably connected with a telescopic heat conduction plate. A supporting spring is fixedly mounted on the inner wall of the limiting slot on the side close to the center of the circle, and the end of the supporting spring away from the center of the circle is fixedly mounted on the end of the telescopic heat conduction plate close to the center of the circle, and an arc contact plate is fixedly mounted on the end of the telescopic heat conduction plate away from the center of the circle. The outer side of the arc contact plate fits with the inner wall of the protective outer tube, and the inner ring surface of the arc contact plate is fixedly installed with a diversion heat conduction plate close to both ends. The diversion heat conduction plate is fitted with the diversion contact block, and the end of the heat conduction main block close to the center of the circle is movably connected with an inverted U-shaped diversion plate. Both ends of the inverted U-shaped diversion plate are fixedly installed with an arc stabilizing block, and the outer side of the conveying inner tube on the side close to the center of the circle of the arc stabilizing block fits, and the heat exchange is accelerated through the mutual cooperation between the internal structures of the heat conduction mechanism, and the fixed blocks and other structures also cooperate with each other to disperse the pressure on the outside of the protective outer tube.
[0007] As an improvement to the above technical solution, an air circulation hole is opened on the front side of the annular support block to facilitate the circulation of gas in the annular space, so that the temperature difference in the annular space is smaller.
[0008] As an improvement to the above technical solution, a square notch is provided on the outer side of the arc contact plate to reduce the material cost of the arc contact plate.
[0009] As an improvement of the above technical solution, a reinforcing rib is fixedly installed on the left side of the heat-conducting main block and on the upper side of the arc support plate. The end of the reinforcing rib close to the center of the circle is fixedly installed to the inner wall of the arc support plate to reinforce the arc support plate and improve the supporting and compressive resistance of the arc support plate.
[0010] The beneficial effects of the present invention are as follows: when the heat transfer mechanism accelerates heat exchange, structures such as the shunt contact block cooperate with the heat transfer mechanism to perform shunt acceleration transfer, thereby improving the overall heat transfer efficiency; when the soil outside the protective outer tube applies additional pressure, the fixed block cooperates with the heat transfer mechanism to buffer the pressure, and also disperses part of the pressure to different positions of the conveying inner tube, thereby improving the overall compressive resistance of the protective outer tube and allowing the protective outer tube to remain intact during geological changes. This positive state not only improves the heat exchange efficiency of the system, but also significantly extends the service life of the geothermal exchange device, reduces the cost caused by frequent maintenance, and reduces the need for replacement. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is the front view of the heat exchange buried pipe device of the utility model;
[0012] Figure 2 This is a structural diagram of the heat exchange buried pipe device of the utility model without the outer pipe;
[0013] Figure 3 For this utility model Figure 1 A magnified view of the structure at center A;
[0014] Figure 4 For this utility model Figure 2 Enlarged view of the structure at point B in the middle.
[0015] Figure numerals: 1, protective outer tube; 11, circular ring support block; 12, conveying inner tube; 2, heat conduction main block; 21, limiting slot; 22, telescopic heat conduction plate; 23, supporting spring; 24, arc contact plate; 25, diverter heat conduction plate; 26, inverted U-shaped diverter plate; 27, arc stabilizing block; 3, arc support plate; 31, diverter contact block; 32, fixing block; 33, rubber pad. DETAILED DESCRIPTION
[0016] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0017] Reference Attachment Figure 1 ,exist Figure 1 In the figure, a points to the front view, and b points to the right view. The above views are only used to understand the plan.
[0018] See also Figure 1-4 , the utility model provides a technical solution:
[0019] Specifically, a high-efficiency heat exchange buried pipe device for shallow geothermal energy includes a protective outer pipe 1, a circular support block 11 is fixedly installed on the inner ring surface of the protective outer pipe 1, a conveying inner pipe 12 is fixedly installed on the inner ring surface of the circular support block 11, and a heat conduction mechanism for accelerating heat exchange efficiency is provided on the front side of the circular support block 11. A circular arc support plate 3 is fixedly installed on one side of the heat conduction mechanism, a diversion contact block 31 is fixedly installed on the inner wall of the protective outer pipe 1, and one side of the diversion contact block 31 is fitted with one side of the heat conduction mechanism, a fixing block 32 is fixedly installed on the end of the circular arc support plate 3 away from the center of the circle, and a rubber pad 33 is fixedly installed on the side of the fixing block 32 close to the protective outer pipe 1, and the rubber pad 33 is fitted with the inner wall of the protective outer pipe 1.
[0020] In this embodiment, when the heat conduction mechanism accelerates heat exchange, the shunt contact block 31 and other structures cooperate with the heat conduction mechanism to perform shunt acceleration transfer, thereby improving the overall heat transfer efficiency. When the soil outside the protective outer tube 1 applies additional pressure, the fixed block 32 cooperates with the heat conduction mechanism to buffer the pressure, and at the same time, part of the pressure is dispersed to different positions of the conveying inner tube 12, thereby improving the overall pressure resistance of the protective outer tube 1.
[0021] Specifically, the heat conduction mechanism includes a heat conduction main block 2, which is fixedly mounted on the front side of the circular support block 11, and the left side of the heat conduction main block 2 is fixedly mounted on the arc support plate 3. A limiting slot 21 is provided on the side of the heat conduction main block 2 away from the center of the circle, and the limiting slot 21 is movably connected to the telescopic heat conduction plate 22. A supporting spring 23 is fixedly mounted on the inner wall of the side of the limiting slot 21 close to the center of the circle, and the end of the supporting spring 23 away from the center of the circle is fixedly mounted on the end of the telescopic heat conduction plate 22 close to the center of the circle, and the telescopic heat conduction plate 22 is away from the center of the circle. An arc contact plate 24 is fixedly installed at one end, and the outer side of the arc contact plate 24 is in contact with the inner wall of the protective outer tube 1. The inner ring surface of the arc contact plate 24 is fixedly installed with a diversion heat conduction plate 25 close to both ends. The diversion heat conduction plate 25 is in contact with the diversion contact block 31. An inverted U-shaped diversion plate 26 is movably connected to the end of the heat conduction main block 2 close to the center of the circle. An arc stabilizing block 27 is fixedly installed at both ends of the inverted U-shaped diversion plate 26. The outer side of the conveying inner tube 12 on the side close to the center of the circle of the arc stabilizing block 27 is in contact.
[0022] In this embodiment, the heat exchange is accelerated by the mutual cooperation between the internal structures of the heat conducting mechanism, and the fixed block 32 and other structures also cooperate with each other to disperse the pressure on the outside of the protective outer tube 1.
[0023] Specifically, an air circulation hole is opened on the front side of the annular support block 11.
[0024] In this embodiment, the circulation of gas in the annular space is facilitated, so that the temperature difference in the annular space is small.
[0025] Specifically, a square notch is formed on the outer side of the arc contact plate 24 .
[0026] In this embodiment, the material cost of the arc contact plate 24 is reduced.
[0027] Specifically, a reinforcing rib is fixedly installed on the left side of the heat conducting main block 2 and on the upper side of the arc support plate 3 , and one end of the reinforcing rib close to the center of the circle is fixedly installed to the inner wall of the arc support plate 3 .
[0028] In this embodiment, the arc support plate 3 is reinforced to improve the supporting and compressive resistance of the arc support plate 3 .
[0029] During use, for heating in winter, when it is necessary to transfer the heat in the soil to the liquid inside the inner delivery tube 12, the heat in the soil enters the annular space through the protective outer tube 1 and transfers heat to the liquid inside the inner delivery tube 12. At the same time, it contacts the protective outer tube 1 through the arc contact plate 24, and quickly transfers the heat on the protective outer tube 1 to the arc contact plate 24. The arc contact plate 24 diverts and accelerates the heat transfer through structures such as the diversion contact block 31 and the telescopic heat conduction plate 22. At the heat conduction main block 2, it is transferred to different positions on the inner delivery tube 12 through the inverted U-shaped diverter plate 26 and the arc stabilizing block 27, thereby uniformly heating the liquid inside the inner delivery tube 12. Similarly, in summer, the excess heat of the liquid in the inner delivery tube 12 can be discharged into the formation by reversing the circulation direction to achieve a cooling effect. As a result, when shallow geological phenomena such as displacement and settlement occur, the geology will exert additional pressure on the soil. At this time, the rubber pads 33 and arc support plates 3 on both sides buffer the pressure acting on the protective outer tube 1, and with the cooperation of the heat conduction mechanism, part of the pressure is dispersed to different positions on the transport inner tube 12, thereby improving the overall compressive performance of the protective outer tube 1, so that the protective outer tube 1 remains intact during geological changes, and the liquid in the transport inner tube 12 is properly protected to avoid long-term direct exposure to the external environment. They will be able to effectively resist pollution and corrosion, thereby slowing down the aging rate of the transport inner tube 12 material. This positive state not only improves the heat exchange efficiency of the system, but also significantly extends the service life of the geothermal exchange device, reduces the cost caused by frequent maintenance, and reduces the need for replacement.
[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.
Claims
1. A high-efficiency heat exchange buried pipe device for shallow geothermal energy, comprising a protective outer pipe (1), characterized in that: A circular support block (11) is fixedly mounted on the inner ring surface of the protective outer tube (1), a conveying inner tube (12) is fixedly mounted on the inner ring surface of the circular support block (11), a heat conduction mechanism for accelerating heat exchange efficiency is provided on the front side of the circular support block (11), a circular arc support plate (3) is fixedly mounted on one side of the heat conduction mechanism, a shunt contact block (31) is fixedly mounted on the inner wall of the protective outer tube (1), one side of the shunt contact block (31) is in contact with one side of the heat conduction mechanism, a fixing block (32) is fixedly mounted on one end of the circular arc support plate (3) away from the center of the circle, a rubber pad (33) is fixedly mounted on the side of the fixing block (32) close to the protective outer tube (1), and the rubber pad (33) is in contact with the inner wall of the protective outer tube (1).
2. The high-efficiency heat exchange buried pipe device for shallow geothermal energy according to claim 1, characterized in that: The heat conduction mechanism comprises a heat conduction main block (2), the heat conduction main block (2) is fixedly mounted on the front side of the annular support block (11), the left side of the heat conduction main block (2) is fixedly mounted on the arc support plate (3), a limiting slot (21) is provided on the side of the heat conduction main block (2) away from the center of the circle, the limiting slot (21) is movably engaged with a telescopic heat conduction plate (22), a supporting spring (23) is fixedly mounted on the inner wall of the side of the limiting slot (21) close to the center of the circle, the end of the supporting spring (23) away from the center of the circle is fixedly mounted on the end of the telescopic heat conduction plate (22) close to the center of the circle, and the telescopic heat conduction plate (22) away from the center of the circle is fixedly mounted. An arc contact plate (24) is fixedly mounted on one end of the heat conducting block (21), the outer side of the arc contact plate (24) is in contact with the inner wall of the protective outer tube (1), a diversion heat conducting plate (25) is fixedly mounted on the inner ring surface of the arc contact plate (24) and close to both ends, the diversion heat conducting plate (25) is in contact with the diversion contact block (31), an inverted U-shaped diversion plate (26) is movably connected to the end of the heat conducting main block (2) close to the center of the circle, and an arc stabilizing block (27) is fixedly mounted on both ends of the inverted U-shaped diversion plate (26), and the outer side of the conveying inner tube (12) close to the center of the circle of the arc stabilizing block (27) is in contact with.
3. The high-efficiency heat exchange buried pipe device for shallow geothermal energy according to claim 1, characterized in that: An air circulation hole is provided on the front side of the annular support block (11).
4. The high-efficiency heat exchange buried pipe device for shallow geothermal energy according to claim 2, characterized in that: A square notch is provided on the outer side of the arc contact plate (24).
5. The high-efficiency heat exchange buried pipe device for shallow geothermal energy according to claim 2, characterized in that: A reinforcing rib is fixedly mounted on the left side of the heat-conducting main block (2) and on the upper side of the arc support plate (3); one end of the reinforcing rib close to the center of the circle is fixedly mounted to the inner wall of the arc support plate (3).