Energy pile end heat exchange tube protection body and energy pile

Abstract

An energy pile end heat exchange tube protection body comprises a housing, the housing is of a structure formed by connecting a left plate, a front plate and a right plate, the outer contour of the cross section of the housing is in a U shape, an inner cavity with a backward opening and an upward opening is formed in the housing, and the distance between the lower portion of the left plate and the lower portion of the right plate is gradually narrowed from top to bottom. The bottom of the left plate and the bottom of the right plate are mutually connected and closed, the width of the lower portion of the front plate is gradually reduced so that the left side and the right side of the front plate can be attached to the lower portion of the left plate and the lower portion of the right plate correspondingly, and the housing is detachably connected to an energy pile through a fastener. Therefore, the heating pipe and the U-shaped connector of the energy pile are accommodated in the inner cavity to realize protection. According to the scheme, the energy pile end heat exchange tube protection body is simple in structure, stable, reliable and convenient to install, and it is ensured that the end heat exchange tube and the U-shaped connector are effectively connected and fixed to the pile body in the energy pile construction process. The utility model further provides an energy pile.

Description

Technical Field

[0001] This utility model relates to the technical field of buried pipes for ground source heat pump pile foundations, and more specifically to a heat exchange pipe protection body at the end of an energy pile and an energy pile. Background Technology

[0002] Depending on the pile foundation construction process, ground source heat pump pile foundation buried pipe technology is mainly divided into two types: cast-in-place pile buried pipe and precast pile buried pipe. Compared with the cast-in-place pile buried pipe technology, which directly embeds the heat exchange pipe in the pile body concrete, the precast pile buried pipe technology, which adopts the static drilling and root planting method, not only reduces the difficulty of vertical pipe construction, but also improves the survival rate of heat exchange pipe. The resulting energy pile has heat exchange pipe in direct contact with the soil heat source, with a large heat exchange area and high heat exchange efficiency. It has already been applied to some extent in the southeast coastal areas.

[0003] The static drilling and embedding method is a precast pile construction technology. The pile formation process involves first drilling a hole using a single-axis drilling rig, then enlarging the base as required at the bearing stratum. Cement grout is then injected and mixed evenly with the soil in the hole to form cement-soil. After the grouting process, the precast pile is embedded into the unhardened cement-soil, thus forming a combined soil-cement-soil-precast pile foundation. The construction process for energy piles using the static drilling and embedding method is as follows: Two single pipes are fused together using a U-shaped connector. After assembly, heat exchange medium is injected and a sealing test is performed to confirm that there are no leaks in the entire heat exchange pipe and at the U-shaped connector. Construction proceeds according to the static drilling and embedding method. When entering the pile embedding stage, the first precast pile section is lifted, and the assembled U-shaped connector and heat exchange pipe are fixed to the pile end. During the pile embedding process, the heat exchange pipe is synchronously buried in the cement-soil along with the pile body. During the pile embedding process, appropriate measures must be taken to ensure that the heat exchange pipe is tightly attached to the outside of the pile body to form the energy pile.

[0004] During the construction of energy piles, the stable and reliable fixing of the heat exchanger pipes and U-shaped connectors to the ends of the energy piles is fundamental to ensuring the survival rate of the heat exchanger pipes. However, during construction, the heat exchanger pipes are in direct contact with the soil layer, and they will encounter great resistance during pile planting, especially when encountering gravel interlayers, which can cause irreparable damage to the heat exchanger pipes and U-shaped connectors, resulting in the failure of heat exchanger pipe installation. The technology in CN 218294795U uses steel bar binding to fix the end heat exchanger pipes and U-shaped connectors. This method is prone to slippage, and directly tightening the heat exchanger pipes increases the friction between the heat exchanger pipes and the pile wall. Too much tightening force will damage the heat exchanger pipes, while too little will not ensure stability. The heat exchanger tube fixing protection unit used in CN 220380359U mainly consists of a protective cover with openings at the top and bottom, a fixing rod, and connecting ears. The protective cover protects the U-shaped connector from direct contact with the soil and prevents friction. The fixing rod secures the U-shaped connector, and the connecting ears fix the protection unit to the lower outer wall of the pile. This type of heat exchanger tube fixing protection unit has the following problems: ① Due to the soil plugging effect, even if some mud can flow out from the openings at the top and bottom of the protective cover, if the pile driving speed is too fast or encounters highly viscous silty soil, the mud inside the protective cover is easily squeezed off before it can drain completely; ② One end of the fixing rod is free, resulting in significant end resistance during pile planting, making it prone to detachment and unable to effectively fix the U-shaped connector; ③ The protective cover frame is flat, while the precast pile surface is curved, preventing the two surfaces from fully fitting together, making it easy for the tube to be squeezed off during sinking. Therefore, there is an urgent need for a simple, stable, reliable, and easy-to-install protective body to ensure effective connection and fixation of the end heat exchanger tube and U-shaped connector to the pile body during energy pile construction. Utility Model Content

[0005] The purpose of this utility model is to provide a protective body with a simple structure, stable and reliable operation, and convenient installation, which ensures that the end heat exchange pipe and U-shaped connector are effectively connected and fixed to the pile body during the construction of the energy pile.

[0006] To address the aforementioned issues, this utility model provides a protective body for the end heat exchange tube of an energy pile, comprising a cover. The cover is formed by connecting a left plate, a front plate, and a right plate to create a cross-sectional outer contour in the shape of a "U". This results in the cover forming an inner cavity with a rearward opening and an upward opening. The distance between the lower parts of the left and right plates gradually narrows from top to bottom, and the bottoms of the left and right plates are connected and closed to each other. The width of the lower part of the front plate gradually narrows so that the left and right sides of the front plate are respectively in contact with the lower parts of the left and right plates.

[0007] In the above solution, the heating pipe and U-shaped connector of the energy pile are all housed within the inner cavity. This is achieved through the left, front, and right plates, which protect the left, front, and right sides of the heating pipe and U-shaped connector. Simultaneously, because the distance between the lower parts of the left and right plates gradually narrows from top to bottom, the lower parts of the left and right plates can guide the soil and rocks to move to the left and right sides of the casing during pile driving, reducing resistance and facilitating pile driving. Furthermore, the bottoms of the left and right plates are interconnected and closed, preventing soil and rocks from entering the inner cavity. Compared with existing technologies, the above solution has a simple casing structure, is easy to install, and provides effective and reliable protection for the heat exchange pipe and U-shaped connector, preventing them from falling off during pile driving and improving the survival rate of the energy pile's heat exchange pipe.

[0008] In an improved design, the lower rear sidewalls of both the left and right plates gradually slope forward from top to bottom. The lower rear side of the casing is provided with an elastic pad whose thickness gradually increases from top to bottom. The elastic pad abuts against the lower rear sidewalls of the left and right plates. Since the surface of the energy pile is curved, this design allows the elastic pad to better fit the surface of the energy pile, reducing the problem of soil and rocks flowing in from the lower side of the casing and causing the casing to detach from the energy pile.

[0009] In an improved embodiment, the front-to-back width P of the upper part of the left and right plates ranges from 50 to 100 mm, the front-to-back width Q of the bottom of the left and right plates ranges from 45 to 95 mm, and Q is at least 4 mm less than P. The front-to-back width O of the bottom of the elastic pad in the uncompressed state is greater than or equal to the difference between Q and P, thereby ensuring that the front-to-back width of the housing is between the typical size of the heating tube U-shaped connector and the typical size of the energy pile bamboo joint protrusion.

[0010] In an improved design, the distance between the lower parts of the left and right plates gradually narrows from top to bottom to form a "V" shape. The included angle α formed by the lower parts of the left and right plates ranges from 30 to 70 degrees, thereby ensuring that the lower parts of the left and right plates can better guide the soil and rock to move to the left and right sides of the casing during the pile driving process.

[0011] In an improved embodiment, the housing is detachably connected to the energy pile via fasteners.

[0012] In an improved embodiment, the lower portions of the left and right plates are used to abut against the left and right sides of the U-shaped connector, respectively, thereby ensuring the installation stability of the casing relative to the energy pile.

[0013] In an improved embodiment, the front panel has a plurality of mounting holes along the front-rear direction, and the fastener passes through the mounting holes and secures the cover to the energy pile.

[0014] In an improved embodiment, the fastener is any one of bolts, expansion bolts, expansion pins, or clamps, thereby making disassembly and assembly simple and convenient.

[0015] In an improved embodiment, there are two mounting holes located on the upper and lower parts of the front panel, respectively. One of the two mounting holes faces the upper side of the U-connector and the other faces the lower side of the U-connector, so that the bolts of the two mounting holes can be connected to the energy pile from the upper and lower parts of the U-connector, respectively, further enhancing the protective effect of the cover on the heating tube and the U-connector.

[0016] This utility model also provides an energy pile, which uses the heat exchange tube protection body at the end of the energy pile as described above. The outer peripheral wall of the energy pile has an integrally formed protrusion, and the protrusion has a groove. The heat exchange tube protection body at the end of the energy pile is installed on the outer peripheral wall of the energy pile, and the bottom of the heat exchange tube protection body at the end of the energy pile is located in the groove. Thus, the protrusion not only improves the load-bearing capacity of the energy pile, but also provides protection for the bottom of the heat exchange tube protection body at the end of the energy pile during the pile driving process, thereby enhancing the protection effect on the heat exchange tube on the energy pile.

[0017] In an improved embodiment, the shape of the groove matches the shape of the bottom of the heat exchanger tube protector at the end of the energy pile. The distance D between the left and right plates relative to the left and right walls of the groove is less than or equal to 3 cm, thereby ensuring that the gap between the heat exchanger tube protector at the end of the energy pile and the groove is very small, reducing the probability of soil and rocks entering the gap between the heat exchanger tube protector at the end of the energy pile and the groove, and further improving the protection effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an overall protective body for a heat exchanger tube at the end of an energy pile.

[0019] Figure 2 For along Figure 1 Cross-sectional view of section AA in the middle;

[0020] Figure 3 This is a schematic diagram of the installation of a heat exchanger tube protection body at the end of an energy pile and the energy pile itself. Figure 1 ;

[0021] Figure 4 This is a schematic diagram of the installation of a heat exchanger tube protection body at the end of an energy pile and the energy pile itself. Figure 2 ;

[0022] Figure 5 A perspective schematic diagram of a heat exchanger tube protector, heating tube, and U-shaped connector at the end of an energy pile;

[0023] Figure 6This is a schematic diagram of an energy pile and a heat exchanger tube protection body at the end of the energy pile.

[0024] Explanation of reference numerals in the attached figures.

[0025] 1. Cover; 11. Front panel; 12. Left panel; 13. Right panel; 14. Inner cavity; 15. Mounting hole; 16. Fastener; 2. Elastic pad; 3. Energy pile; 31. Heating tube; 32. U-shaped connector; 33. Screw hole; 34. Protrusion; 35. Groove. Detailed Implementation

[0026] It should be understood by those skilled in the art that the following embodiments are merely illustrative of the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0027] In the following description of the embodiments, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0028] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0030] Example 1

[0031] Please see Figures 1-5The present invention provides a protective body for the end heat exchange tube of an energy pile, including a cover 1. The cover 1 is formed by connecting a left plate 12, a front plate 11 and a right plate 13 to form a structure with a cross-sectional outer contour of "U". The cover 1 forms an inner cavity 14 with a rearward opening and an upward opening. The distance between the lower parts of the left plate 12 and the right plate 13 gradually narrows from top to bottom, and the bottoms of the left plate 12 and the right plate 13 are connected and closed to each other. The width of the lower part of the front plate 11 gradually narrows so that the left and right sides of the front plate 11 are in close contact with the lower parts of the left plate 12 and the right plate 13, respectively.

[0032] In the above scheme, the rearward opening of the inner cavity 14 faces the outer peripheral wall of the energy pile 3, so that the heating pipe 31 and the U-shaped connector 32 on the energy pile 3 are both accommodated in the inner cavity 14. That is, the left plate 12, the front plate 11 and the right plate 13 provide protection for the left, front and right sides of the heating pipe 31 of the energy pile 3. At the same time, since the distance between the lower parts of the left plate 12 and the right plate 13 gradually narrows from top to bottom, the lower parts of the left plate 12 and the right plate 13 can guide the soil and rocks to move to the left and right sides of the cover 1 during the pile driving process, reducing resistance and facilitating pile driving. Moreover, the bottom of the left plate 12 and the right plate 13 are connected and closed to each other, which can prevent soil and rocks from entering the inner cavity 14. Compared with the prior art, the cover 1 of the above scheme has a simple structure and is easy to install. It can achieve effective and reliable protection for the heat exchange pipe and the U-shaped connector 32, prevent them from falling off during the pile driving process and improve the survival rate of the heat exchange pipe of the energy pile 3.

[0033] The left plate 12, front plate 11, and right plate 13 of the casing 1 are preferably integrally die-cast to ensure good structural strength; however, they can also be manufactured separately and then assembled, which is not limited in this design. The bottoms of the left plate 12 and right plate 13 can be connected and closed by welding, or they can be directly integrally formed. To achieve its protective function, the casing 1 has rigidity and strength requirements. Steel is preferred as the material for the casing 1, and the thickness of the casing 1 is greater than 2mm. Reinforcing ribs can be added to the inner cavity 14 according to actual needs.

[0034] The housing 1 is detachably connected to the energy pile 3 via fasteners 16. Regarding the specific form of the detachable connection between the housing 1 and the energy pile 3, in this embodiment, the front plate 11 has two mounting holes 15 along the front-rear direction. The two mounting holes 15 are located at the upper and lower parts of the front plate 11, respectively. One of the mounting holes 15 faces the upper side of the U-shaped connector 32, and the other faces the lower side of the U-shaped connector 32. The fastener 16 is a bolt that passes through the mounting hole 15. The energy pile 3 has a screw hole 33 corresponding to the mounting hole 15. Thus, by screwing the bolt into the screw hole 33 of the energy pile 3, the housing 1 can be fixedly installed relative to the energy pile 3. Simultaneously, the bolts in the two mounting holes 15 can be connected to the energy pile 3 from above and below the U-shaped connector 32, respectively, further enhancing the protective effect of the housing 1 on the heating pipe 31 and the U-shaped connector 32. Preferably, the two mounting holes 15 are located at the center of the width in the left-right direction of the front plate 11, thereby making the force on the fastener 16 more balanced during pile driving, and the connection between the housing 1 and the energy pile 3 more stable.

[0035] Regarding the specific steps for installing the housing 1 onto the energy pile 3, taking the heating tube 31 and U-shaped connector 32 located on the front side of the energy pile 3 as an example, first align the rear opening of the housing 1 with the heating tube 31 and U-shaped connector 32. Then, move the housing 1 from front to back until the lower end of the heating tube 31 and the U-shaped connector 32 are enclosed in the inner cavity 14. Since the distance between the lower parts of the left plate 12 and the right plate 13 gradually narrows from top to bottom, and the bottoms of the left plate 12 and the right plate 13 are connected and closed to each other, the lower side of the inner cavity 14 is closed, while the upward opening of the inner cavity 14 is used for the heating tube 31 to pass through upward to avoid interference. Then, insert the fastener 16 into the mounting hole 15 and screw the fastener 16 into the screw hole 33 on the energy pile 3 to achieve the installation of the housing 1 relative to the energy pile 3. Of course, the fastener 16 can also be an expansion screw, expansion pin, clamp, etc., which is not limited in this design.

[0036] It should be understood that the housing 1 can also be detachably connected to the energy pile 3 in other ways. For example, lugs protruding in the left and right directions can be provided on the left plate 12 and the right side respectively. The lugs have through holes in the front and back directions. The fastener 16 is also a bolt with one end connected to the through hole and the other end screwed to the energy pile 3. Alternatively, a slot can be provided on the surface of the energy pile 3, and the left plate 12 and the right plate 13 of the housing 1 can be snapped into the slot to achieve the connection and fixation of the housing 1 relative to the energy pile 3.

[0037] Example 2

[0038] Please see Figures 1-5The second embodiment of this utility model provides a heat exchange tube protection body for the end of an energy pile, including a cover 1. The cover 1 is formed by connecting a left plate 12, a front plate 11 and a right plate 13 to form a structure with a "U"-shaped cross-section. The cover 1 forms an inner cavity 14 with a rearward opening and an upward opening. The distance between the lower parts of the left plate 12 and the right plate 13 gradually narrows from top to bottom to form a "V" or "U" shaped structure. The bottoms of the left plate 12 and the right plate 13 are connected and closed to each other. The width of the lower part of the front plate 11 gradually narrows so that the left and right sides of the front plate 11 are in close contact with the lower parts of the left plate 12 and the right plate 13, respectively. The cover 1 is detachably connected to the energy pile 3 by fasteners 16 so that the heating tube 31 and the U-shaped connector 32 of the energy pile 3 are accommodated in the inner cavity 14 for protection.

[0039] Furthermore, the lower rear sidewalls of the left plate 12 and the right plate 13 are both gradually inclined forward from top to bottom, and the lower rear side of the cover 1 is provided with an elastic pad 2 whose thickness gradually increases from top to bottom. The left and right sides of the elastic pad 2 are respectively connected to the lower rear sidewalls of the left plate 12 and the right plate 13.

[0040] The above solution improves upon the beneficial effects of Embodiment 1. Specifically, since the surface of the energy pile 3 is generally curved, the rigid casing 1 has limited fit with the energy pile 3. Therefore, during the pile driving process, soil and rocks may enter the gap between the energy pile 3 and the lower side of the casing 1, causing the casing 1 to detach from the energy pile 3. In this embodiment, the casing 1 is designed such that the rear sidewalls of the lower part of the left plate 12 and the right plate 13 gradually slope forward from top to bottom. The lower part of the rear side of the casing 1 is provided with an elastic pad 2 whose thickness gradually increases from top to bottom. The elastic pad 2 can better fit with the surface of the energy pile 3, reducing the problem of soil and rocks flowing in from the lower side of the casing 1 and causing the casing 1 to detach from the energy pile 3.

[0041] Furthermore, in this embodiment, the lower parts of the left plate 12 and the right plate 13 are respectively used to abut against the left and right sides of the U-shaped connector 32, so that the lower parts of the left plate 12 and the right plate 13 can be supported by the U-shaped connector 32, ensuring the installation stability of the cover 1 relative to the energy pile 3.

[0042] In addition, the front-to-back width P of the upper part of the left plate 12 and the right plate 13 ranges from 50 to 100 mm, the front-to-back width Q of the bottom of the left plate 12 and the right plate 13 ranges from 45 to 95 mm, and Q is at least 4 mm less than P. The front-to-back width O of the bottom of the elastic pad 2 in the uncompressed state is greater than or equal to the difference between Q and P, thereby ensuring that the front-to-back width of the cover 1 is greater than the usual size of the heating tube 31 and the U-shaped connector 32, and smaller than the usual size of the protrusion 34 of the energy pile 3.

[0043] For example, the front-to-back width P of the upper part of the left plate 12 and the right plate 13 is preferably 55 mm, the front-to-back width Q of the bottom of the left plate 12 and the right plate 13 is preferably 50 mm, and the front-to-back width O of the bottom of the elastic pad 2 is 55-50=5 mm; in addition, the left-to-right width of the front plate 11 is 120 mm, and the diameter of the mounting hole 15 is 16 mm. This size ensures that the housing 1 can accommodate most heating tubes 31 and U-shaped connectors 32.

[0044] In this embodiment, the distance between the lower parts of the left plate 12 and the right plate 13 gradually narrows from top to bottom to form a "V" shaped structure. The included angle α formed by the lower parts of the left plate 12 and the right plate 13 is in the range of 30 to 70 degrees, thereby ensuring that the lower parts of the left plate 12 and the right plate 13 can guide the soil and rock to move better to the left and right sides of the casing 1 during the pile driving process.

[0045] In some embodiments, the included angle α formed by the lower parts of the left plate 12 and the right plate 13 is 60 degrees, thereby ensuring that the resistance exerted by the soil and rock on the casing 1 is small during the pile driving process while ensuring that the casing 1 has good structural strength.

[0046] In other embodiments, the included angle α formed by the lower parts of the left plate 12 and the right plate 13 is 45 degrees, thereby reducing the resistance exerted by the soil and rock on the casing 1 during pile driving.

[0047] Example 3

[0048] Please see Figure 6 The third embodiment of this utility model provides an energy pile 3, which uses the heat exchange tube protection body at the end of the energy pile as described in the above embodiments. The outer peripheral wall of the energy pile 3 has an integrally formed protrusion 34, and the protrusion 34 has a groove 35. The heat exchange tube protection body at the end of the energy pile is installed on the outer peripheral wall of the energy pile 3, and the bottom of the heat exchange tube protection body at the end of the energy pile is located in the groove 35. Thus, the protrusion 34 not only plays the role of improving the bearing capacity of the energy pile 3, but also the bottom of the heat exchange tube protection body at the end of the energy pile can be protected by the groove 35 of the protrusion 34 during the pile driving process, thereby strengthening the protection effect on the heat exchange tube on the energy pile 3.

[0049] As a further improvement, the shape of the groove 35 matches the shape of the bottom of the heat exchange tube protection body at the end of the energy pile. For example, when the lower parts of the left plate 12 and the right plate 13 form a "V" shape, the groove 35 also has a "V" shape. The distance D between the left plate 12 and the left wall of the groove 35 is less than or equal to 3cm, and the distance D between the right plate 13 and the right wall of the groove 35 is less than or equal to 3cm. This ensures that the gap between the heat exchange tube protection body at the end of the energy pile and the groove 35 is very small, reducing the probability of soil and rocks entering the gap between the heat exchange tube protection body at the end of the energy pile and the groove 35, and further improving the protection effect.

[0050] It should be noted that in the description of this application, the terms "inner" and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. All directional indications (such as up, down, left, right, front, back, inner, and outer) are only used to explain the relative positional relationships and movement between components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0051] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0052] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A protective body for the end heat exchanger tube of an energy pile, characterized in that, It includes a housing (1), and the housing (1) is formed by connecting a left plate (12), a front plate (11) and a right plate (13) to form a structure with a "U-shaped" cross-sectional outer contour, and the housing (1) forms an inner cavity (14) with an opening to the rear and an opening upward. The distance between the lower parts of the left plate (12) and the right plate (13) gradually narrows from top to bottom, and the bottoms of the left plate (12) and the right plate (13) are connected and closed to each other. The width of the lower part of the front plate (11) gradually narrows so that the left and right sides of the front plate (11) are respectively in contact with the lower parts of the left plate (12) and the right plate (13).

2. The end heat exchanger tube protection body of the energy pile according to claim 1, characterized in that, The rear side walls of the lower parts of the left plate (12) and the right plate (13) are gradually inclined forward from top to bottom. An elastic pad (2) with a thickness gradually increasing from top to bottom is provided at the lower part of the rear side of the housing (1), and the elastic pad (2) abuts against the rear side walls of the lower parts of the left plate (12) and the right plate (13).

3. The heat exchanger tube protection body at the end of the energy pile according to claim 2, characterized in that, The numerical range of the width P in the front-back direction of the upper parts of the left plate (12) and the right plate (13) is 50 - 100 mm, the numerical range of the width Q in the front-back direction of the bottoms of the left plate (12) and the right plate (13) is 45 - 95 mm, and Q is at least 4 mm less than P. The numerical range of the width O in the front-back direction of the bottom of the elastic pad (2) in the non-extruded and deformed state is greater than or equal to the difference between Q and P.

4. The end heat exchanger tube protection body of the energy pile according to any one of claims 1-3, characterized in that, The distance between the lower parts of the left plate (12) and the right plate (13) gradually narrows from top to bottom to form a "V-shaped" structure, and the numerical range of the included angle α formed by the lower parts of the left plate (12) and the right plate (13) is 30 - 70 degrees.

5. The end heat exchanger tube protection body of the energy pile according to claim 1, characterized in that, The housing (1) is detachably connected to the energy pile (3) through a fastener (16).

6. The end heat exchanger tube protection body of the energy pile according to claim 5, characterized in that, The lower parts of the left plate (12) and the right plate (13) are respectively used to abut against the left and right sides of the U-shaped connector (32).

7. The end heat exchanger tube protection body of the energy pile according to claim 5, characterized in that, The front plate (11) is provided with a number of mounting holes (15) in the front-back direction. The fastener (16) passes through the mounting holes (15) and fixes the housing (1) to the energy pile (3).

8. The end heat exchanger tube protection body of the energy pile according to any one of claims 5-7, characterized in that, The fastener (16) is any one of a bolt, an expansion screw, a dowel pin, and a clamp.

9. The heat exchanger tube protection body at the end of the energy pile according to claim 7, characterized in that, The number of the mounting holes (15) is two and they are respectively located at the upper and lower parts of the front plate (11). One of the two mounting holes (15) is directly opposite to the upper side of the U-shaped connector (32) and the other is directly opposite to the lower side of the U-shaped connector (32).

10. An energy pile, characterized in that, The energy pile end heat exchange tube protector as described in any one of claims 1 - 9 is applied. The outer peripheral wall of the pile body of the energy pile (3) has an integrally formed convex part (34), and a groove (35) is provided in the convex part (34). The energy pile end heat exchange tube protector is installed on the outer peripheral wall of the energy pile (3), and the bottom of the energy pile end heat exchange tube protector is located in the groove (35).

11. The energy pile according to claim 10, characterized in that, The shape of the groove (35) matches the shape of the bottom of the energy pile end heat exchange tube protector, and the distance D between the left plate (12) and the right plate (13) relative to the left groove wall and the right groove wall of the groove (35) is less than or equal to 3 cm.

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