Energy pile and preparation method thereof

Abstract

The present invention belongs to the technical field of civil engineering and construction, and discloses an energy pile and a preparation method thereof. The energy pile includes a pile body, multiple first energy storage tubes and a heat exchange component. Phase change material is sealed in the first energy storage tube. The multiple first energy storage tubes are all arranged in the pile body and arranged on the outside of the steel cage along the circumference of the steel cage to ensure the strength and bearing capacity of the energy pile body. At the same time, since there is relatively more phase change material in the first energy storage tube, the energy pile also has a higher energy density, thereby improving the heat exchange efficiency; the heat exchange component can perform heat exchange and heat circulation on the phase change material; the energy pile prepared by the preparation method overcomes the shortcomings and deficiencies of phase change concrete made by aggregate substitution, increases the energy density and heat exchange efficiency of the energy pile, and at the same time, can well ensure the strength of the pile body, and the preparation method is simple and easy.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering, and in particular to an energy pile and a preparation method thereof. Background Art

[0002] With the development of human society and economy, environmental and energy issues are becoming increasingly severe. Shallow geothermal energy, as a widely distributed, abundant, and renewable green clean energy source, is gaining increasing attention and utilization. Energy pile technology is a new energy-saving and emission-reduction technology that combines traditional ground-source heat pump technology with pile foundations to utilize shallow geothermal energy. It not only addresses the shortcomings of traditional ground-source heat pump technology, but also reduces construction costs and improves heat exchange efficiency.

[0003] Phase change material is a substance that can provide latent heat by changing its physical state. It is cheap and efficient, and is therefore widely used in various industries for energy storage. Phase change energy storage concrete is mostly made by adsorbing phase change materials into porous materials such as ceramsite and adding them into concrete as aggregate. Applying this phase change energy storage concrete to energy piles is not only cumbersome in production, but also has a low content of phase change material, resulting in low heat exchange efficiency. In addition, the compressive strength of the energy piles produced is often low, which greatly limits the actual engineering application of energy piles. Summary of the Invention

[0004] The purpose of the present invention is to provide an energy pile and a preparation method thereof, which can improve the heat exchange efficiency of the energy pile while ensuring strength and bearing capacity, and facilitate the application of phase change materials in the energy pile.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The present invention provides an energy pile, comprising:

[0007] Pile body, including steel cage and concrete;

[0008] a plurality of first energy storage tubes, each of which is sealed with a phase change material and extends along the length of the pile body; each of the first energy storage tubes is disposed within the pile body and outside the steel cage along the circumference of the steel cage; and

[0009] The heat exchange component is configured to perform heat exchange and heat circulation on the phase change material.

[0010] The energy pile includes a pile body, multiple first energy storage tubes and a heat exchange component. The pile body includes a steel cage and concrete. Phase change material is sealed in the first energy storage tube, and the phase change material has an energy storage function. The first energy storage tube extends along the length of the pile body. Multiple first energy storage tubes are all arranged in the pile body and are arranged along the circumference of the steel cage, which can well ensure the pile body strength and bearing capacity of the energy pile. At the same time, since there is relatively more phase change material in the first energy storage tube, the energy pile also has a higher energy density, thereby improving the heat exchange efficiency. The heat exchange component can perform heat exchange and heat circulation on the phase change material to absorb the heat in the soil through the pile body into the multiple first energy storage tubes, and transfer the absorbed heat to the upper building for heating, or absorb the heat of the upper building and then release it to the soil through the pile body to cool the upper building.

[0011] Preferably, the heat exchange assembly comprises: a heat exchange tube, comprising a water inlet pipe and a water outlet pipe, the water inlet pipe being connected to the water outlet pipe, the pipe body of the water inlet pipe and the pipe body of the water outlet pipe being spaced apart and arranged in the pile body, and the water inlet of the water inlet pipe and the water outlet of the water outlet pipe extending out of the pile body;

[0012] And / or, the energy pile also includes two steel meshes, which are placed in the pile body and are both arranged on the outside of the steel cage along the circumference of the steel cage. Multiple first energy storage tubes are placed between the two steel meshes, and each of the first energy storage tubes is fixedly connected to the two steel meshes.

[0013] The heat exchange fluid in the water inlet pipe and the water outlet pipe circulates to exchange heat with the phase change material and perform heat circulation.

[0014] Preferably, the energy pile further comprises:

[0015] A plurality of second energy storage tubes are provided with a phase change material sealed therein and extend along the length direction of the pile body. The plurality of second energy storage tubes are all provided in the pile body and are all located between the water inlet pipe and the water outlet pipe.

[0016] Multiple second energy storage tubes can increase the energy density of the energy pile. Multiple second energy storage tubes arranged between the water inlet pipe and the water outlet pipe can make the energy distribution in the energy pile more uniform, so that the water inlet pipe and the water outlet pipe can absorb or release energy.

[0017] Preferably, the first energy storage tube and the second energy storage tube each include a hollow packaging tube and a packaging cap, the packaging cap is provided at the opening of the hollow packaging tube, and the phase change material is sealed in the hollow packaging tube.

[0018] Phase change material can be stored in the hollow packaging tube, and the packaging cap is used to seal the phase change material in the hollow packaging tube. The structures of the first energy storage tube and the second energy storage tube are relatively simple and easy to manufacture.

[0019] Preferably, a plurality of the first energy storage tubes are arranged between two steel meshes.

[0020] Multiple first energy storage tubes are arranged between two steel meshes, and the fixing work can be completed in the factory. On site, you only need to fix the first energy storage tubes and the steel mesh as a whole directly to the steel cage, which greatly simplifies the on-site operation process and improves assembly efficiency. In addition, the steel mesh has a high thermal conductivity coefficient, which can further improve the heat transfer between the pile body and the first energy storage tube, thereby improving the heat exchange efficiency of the energy pile.

[0021] Preferably, the plurality of second energy storage tubes are arranged in two rows.

[0022] The multiple second energy storage tubes between the water inlet pipe and the water outlet pipe are arranged in two rows, which can play a certain isolation role for the water inlet pipe and the water outlet pipe, prevent the water inlet pipe and the water outlet pipe from directly exchanging heat, and improve the heat exchange efficiency of the energy pile.

[0023] Preferably, the energy pile further comprises:

[0024] The heat insulation component is configured to block heat transfer between the water inlet pipe and the water outlet pipe.

[0025] The thermal insulation component can block the heat transfer between the water inlet pipe and the water outlet pipe, thereby reducing the mutual influence between the water inlet pipe and the water outlet pipe, and further improving the heat exchange efficiency of the energy pile.

[0026] Preferably, the thermal insulation assembly comprises:

[0027] Multiple insulation sleeves, each insulation sleeve includes a main body and a claw, the main body is semicircular and extends along the length direction of the second energy storage tube, the claw is set on the main body, and each main body is covered with a corresponding second energy storage tube through the claw.

[0028] The structure of the thermal insulation sleeve is simple and easy to manufacture. The main body of the thermal insulation sleeve is covered on the second energy storage tube through the claws. The thermal insulation sleeve on each second energy storage tube forms an insulation layer between the water inlet pipe and the water outlet pipe, thereby reducing the mutual influence between the water inlet pipe and the water outlet pipe, and further improving the heat exchange efficiency of the energy pile.

[0029] Preferably, the opening of the thermal insulation sleeve on a row of the second energy storage tubes close to the water inlet pipe is arranged toward the water inlet pipe, and the opening of the thermal insulation sleeve on a row of the second energy storage tubes close to the water outlet pipe is arranged toward the water outlet pipe.

[0030] The opening of the thermal insulation sleeve on the second energy storage tubes in a row near the water inlet pipe is arranged toward the water inlet pipe, so that the energy of the second energy storage tubes in a row near the water inlet pipe can only be heat exchanged with the water inlet pipe, preventing the second energy storage tubes in this row from exchanging heat with the water outlet pipe. The opening of the thermal insulation sleeve on the second energy storage tubes in a row near the water outlet pipe is arranged toward the water outlet pipe, so that the energy of the second energy storage tubes in a row near the water outlet pipe can only be heat exchanged with the water outlet pipe, preventing the second energy storage tubes in this row from exchanging heat with the water inlet pipe, thereby improving the heat exchange efficiency between the second energy storage tubes and the water inlet pipe and the water inlet pipe.

[0031] The present invention also provides a method for preparing an energy pile, which is used to prepare an energy pile. The preparation method comprises the following steps:

[0032] S1. Place the phase change material into a hollow packaging tube and seal it with a packaging cap;

[0033] S2. Provide two steel meshes, securely arrange the plurality of first energy storage tubes on one of the steel meshes, and secure the other steel mesh on the arranged first energy storage tubes;

[0034] S3, tying the steel cage;

[0035] S4, preparing a water inlet pipe and a water outlet pipe;

[0036] S5, fixing the prepared water inlet pipe and the water outlet pipe on the steel cage;

[0037] S6. Connecting a plurality of heat-insulating ferrules to corresponding second energy storage tubes;

[0038] S7, arranging the plurality of second energy storage tubes into two rows, and arranging the two rows of second energy storage tubes between the water inlet pipe and the water outlet pipe;

[0039] S8, fixing the installed plurality of first energy storage tubes and the two steel meshes as a whole to the outside of the steel cage along the circumference of the steel cage;

[0040] S9. Pour concrete.

[0041] The energy pile prepared using this method overcomes the shortcomings and deficiencies of phase change concrete made by aggregate substitution, increases the energy density and heat exchange efficiency of the energy pile, and at the same time, can well ensure the strength of the pile body, and the preparation method is simple and easy.

[0042] Preferably, in step S7, the opening of the thermal insulation sleeve on a row of the second energy storage tubes close to the water inlet pipe is oriented toward the water inlet pipe, and the opening of the thermal insulation sleeve on a row of the second energy storage tubes close to the water outlet pipe is oriented toward the water outlet pipe.

[0043] By positioning the opening of the heat-insulating sleeve on the row of second energy storage tubes near the water inlet pipe toward the water inlet pipe, the energy of the second energy storage tubes in the row near the water inlet pipe can be heat-exchanged only with the water inlet pipe, preventing the second energy storage tubes in this row from heat-exchanging with the water outlet pipe. By positioning the opening of the heat-insulating sleeve on the row of second energy storage tubes near the water outlet pipe toward the water outlet pipe, the energy of the second energy storage tubes in the row near the water outlet pipe can be heat-exchanged only with the water outlet pipe, preventing the second energy storage tubes in this row from heat-exchanging with the water inlet pipe. This method improves the heat exchange efficiency between the second energy storage tubes and the water inlet pipe, and between the water inlet pipe and the water outlet pipe.

[0044] Beneficial effects of the present invention:

[0045] The energy pile proposed in the present invention includes a pile body, a plurality of first energy storage tubes, and a heat exchange assembly. The pile body includes a steel cage and concrete. A phase change material is sealed within the first energy storage tube, which has an energy storage function. The first energy storage tube extends along the length of the pile body. The plurality of first energy storage tubes are disposed within the pile body and are all located outside the steel cage along the circumference of the steel cage. The steel cage and the first energy storage tubes effectively ensure the structural strength and load-bearing capacity of the energy pile body. Furthermore, compared to piles made by adsorbing phase change material into porous materials such as ceramsite as aggregate and incorporating it into concrete, the energy pile also has a higher energy density due to the relatively large amount of phase change material stored in the first energy storage tubes, thereby improving heat exchange efficiency. The heat exchange assembly can exchange heat with the phase change material and perform heat circulation, thereby absorbing heat from the ground through the pile body into the plurality of first energy storage tubes and transferring the absorbed heat to the upper structure for heating, or absorbing heat from the upper structure and releasing it back into the ground through the pile body for cooling the upper structure.

[0046] The preparation method of the energy pile proposed in the present invention is used to prepare the above-mentioned energy pile. The energy pile prepared using this method overcomes the shortcomings and deficiencies of phase change concrete energy piles made by aggregate substitution, increases the energy density and heat exchange efficiency of the energy pile, and at the same time, can also well ensure the structural strength of the pile body, and the preparation method is simple and easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 is a cross-sectional view of an energy pile proposed in an embodiment of the present invention;

[0048] Figure 2 is a schematic diagram of a pile body and a heat exchange assembly proposed in an embodiment of the present invention;

[0049] Figure 3 is a schematic diagram of a pile body and a second energy storage tube proposed in an embodiment of the present invention;

[0050] Figure 4 is a schematic diagram of a first energy storage tube and a steel mesh proposed in an embodiment of the present invention;

[0051] Figure 5 Schematic diagram of a hollow packaging tube and a packaging cap according to an embodiment of the present invention;

[0052] Figure 6 Schematic diagram of the heat-insulating sleeve proposed in an embodiment of the present invention.

[0053] In the picture:

[0054] 1. Pile body; 2. First energy storage tube; 3. Water inlet pipe; 4. Water outlet pipe; 5. Second energy storage tube; 6. Hollow packaging tube; 7. Packaging cap; 8. Insulation sleeve; 9. Cable tie; 10. Wire mesh;

[0055] 11. Steel cage; 81. Main body; 82. Clamping claw;

[0056] 111. Main reinforcement; 112. Stirrups. DETAILED DESCRIPTION

[0057] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0058] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0059] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0060] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0061] Example 1

[0062] This embodiment provides an energy pile, such as Figure 1-Figure 3 As shown, the energy pile includes a pile body 1, multiple first energy storage tubes 2, and a heat exchange assembly. The pile body 1 includes a steel cage 11 and concrete. The steel cage 11 includes multiple main bars 111 and multiple stirrups 112. Each main bar 111 extends along the length of the pile body 1. The multiple main bars 111 are spaced apart along the circumference of the pile body 1. Each stirrup 112 is annular and arranged around the outside of the multiple main bars 111. The multiple stirrups 112 are spaced apart along the length of the pile body 1. The main bars 111 and stirrups 112 can be fixedly connected by binding, welding, or other means to form the steel cage 11. The first energy storage tube 2 is sealed and filled with a phase change material that has an energy storage function. The first energy storage tube 2 extends along the length of the pile body 1. The multiple first energy storage tubes 2 are all arranged in the pile body 1 and are all arranged on the outside of the steel cage 11 along the circumference of the steel cage 11. The installation of the steel cage 11 and the first energy storage tubes 2 ensures the compressive strength and load-bearing capacity of the energy pile. Furthermore, due to the relatively large amount of phase-change material within the first energy storage tubes 2, the energy pile also has a high energy density, thereby improving heat exchange efficiency. The heat exchange assembly can exchange heat with the phase-change material and perform a heat cycle, absorbing heat from the ground through the pile body 1 into the multiple first energy storage tubes 2, and then transferring the absorbed heat to the upper structure for heating, or absorbing heat from the upper structure and releasing it back into the ground through the pile body 1 to cool the upper structure. In this embodiment, the first energy storage tubes 2 are evenly spaced along the circumference of the steel cage 11.

[0063] Specifically, the heat exchange assembly includes a heat exchange tube, which is composed of a connected water inlet pipe 3 and a water outlet pipe 4. The pipe body of the water inlet pipe 3 and the pipe body of the water outlet pipe 4 are spaced apart and arranged in the pile body 1. The water inlet of the water inlet pipe 3 and the water outlet of the water outlet pipe 4 extend out of the pile body 1. The water inlet pipe 3 and the water outlet of the water outlet pipe 4 circulate the heat exchange fluid in the pipes to perform heat exchange and heat circulation on the phase change material. In this embodiment, the heat exchange fluid can be water or other fluids, which are not limited here. The water inlet pipe 3 and the water outlet pipe 4 are respectively arranged on opposite sides of the pile body 1 in the radial direction.

[0064] Two water inlet pipes 3 are provided, and two water outlet pipes 4 are provided. The two water inlet pipes 3 are connected to the two water outlet pipes 4 in a one-to-one correspondence, and the correspondingly connected water inlet pipes 3 and outlet pipes 4 are connected via a connecting pipe. Furthermore, the heat exchange tubes in this embodiment are parallel double U-shaped tubes, and the bottoms of the water inlet pipes 3 and outlet pipes 4 are connected in a one-to-one correspondence via two connecting pipes in a cross shape. In addition, the water inlet pipes 3 and outlet pipes 4 are fixed to the main reinforcement 111 of the steel cage 11 via cable ties 9. In this embodiment, six main reinforcements 111 are evenly spaced, and the two pipes of the water inlet pipes 3 and the two pipes of the water outlet pipes 4 are each fixedly connected to a main reinforcement 111 via a cable tie 9.

[0065] like Figure 1 and Figure 3 As shown, the energy pile also includes multiple second energy storage tubes 5, which are sealed with phase change material and extend along the length of the pile body 1. The multiple second energy storage tubes 5 are all arranged within the pile body 1, specifically on the inner side of the steel cage 11, and the second energy storage tubes 5 are arranged in two rows between the water inlet pipe 3 and the water outlet pipe 4. The multiple second energy storage tubes 5 can increase the energy density of the energy pile. The multiple second energy storage tubes 5 arranged between the water inlet pipe 3 and the water outlet pipe 4 can make the energy distribution within the energy pile more uniform, so that the water inlet pipe 3 and the water outlet pipe 4 can absorb or release energy. At the same time, the multiple second energy storage tubes 5 arranged in two rows can provide a certain degree of isolation between the water inlet pipe 3 and the water outlet pipe 4. The two rows of second energy storage tubes 5 can separate the pipe body of the water inlet pipe 3 and the pipe body of the water outlet pipe 4, preventing the pipe body of the water inlet pipe 3 and the pipe body of the water outlet pipe 4 from directly exchanging heat within the pile body 1, thereby improving the heat exchange efficiency of the energy pile.

[0066] In this embodiment, the first energy storage tube 2 and the second energy storage tube 5 have the same structure, each comprising a hollow encapsulating tube 6 and an encapsulating cap 7. Both the hollow encapsulating tube 6 and the encapsulating cap 7 have circular cross-sections and a diameter of 2 cm or greater. The encapsulating cap 7 covers the opening of the hollow encapsulating tube 6 and seals the opening, thereby sealing the phase change material within the hollow encapsulating tube 6. The hollow encapsulating tube 6 can store the phase change material, and the encapsulating cap 7 is used to seal the phase change material within the hollow encapsulating tube 6. The structures of the first energy storage tube 2 and the second energy storage tube 5 are relatively simple, making them easy to manufacture.

[0067] Optionally, the opening of the hollow packaging tube 6 is provided with an external thread (see Figure 5), the encapsulating cap 7 is provided with an internal thread and is threadedly connected to the hollow encapsulating tube 6 to seal the phase change material within the hollow encapsulating tube 6. Of course, the encapsulating cap 7 and the hollow encapsulating tube 6 can also be connected by clamping, riveting, or welding. The connection method between the encapsulating cap 7 and the hollow encapsulating tube 6 is not limited here, as long as a sealed connection between the encapsulating cap 7 and the hollow encapsulating tube 6 is achieved. In this embodiment, one end of the hollow encapsulating tube 6 is open, and the encapsulating cap 7 is provided with a.

[0068] In order to further increase the strength of the energy pile body 1, the hollow packaging tube 6 and the packaging cap 7 in this embodiment are both made of metal materials; optionally, the hollow packaging tube 6 and the packaging cap 7 can be made of aluminum alloy, copper alloy, or stainless steel; it should be mentioned that the metal material used for the hollow packaging tube 6 and the packaging cap 7 must have certain anti-corrosion properties to prevent the hollow packaging tube 6 or the packaging cap 7 from corrosion or rust, thereby reducing the possibility of leakage of the phase change material.

[0069] In this embodiment, the energy pile further includes two steel meshes 10, which are placed inside the pile body 1 and are both arranged outside the steel cage 11 along the circumference of the steel cage 11. Multiple first energy storage tubes 2 are placed between the two steel meshes 10, and each first energy storage tube 2 is fixedly connected to the two steel meshes 10. The multiple first energy storage tubes 2 are arranged between the two steel meshes 10 (see Figure 4 ) Binding and positioning work is completed at the factory. On-site, only the first energy storage tube 2 and wire mesh 10 need to be directly fixed to the steel cage 11. This greatly simplifies the on-site work process, facilitates installation, and improves assembly efficiency. Furthermore, the use of wire mesh 10 to connect multiple first energy storage tubes 2 provides excellent thermal conductivity, improving heat transfer between the pile body 1 and the first energy storage tubes 2, and enhancing the heat exchange efficiency of the energy pile.

[0070] Furthermore, the two steel meshes 10 are fixedly connected, further improving the structural integrity between the first energy storage tube 2 and the steel mesh 10, facilitating transportation, and further preventing the first energy storage tube 2 from separating from the steel mesh 10. Specifically, the two steel meshes 10 are connected at their respective ends along the circumferential direction and can be fastened with wire or cable ties.

[0071] Regardless of the type of buried pipe used in the energy pile, the heat exchange fluid needs to flow through the water inlet of the water inlet pipe 3, through the pile body 1, to the bottom of the pile, and then flow out from the bottom of the pile upward through the water outlet of the water outlet pipe 4. In the upper part of the pile body 1, since the heat exchange fluid has undergone heat exchange, the temperature difference between the heat exchange fluid in the water inlet and the water outlet is relatively large, and the thermal conductivity of concrete is relatively good. The water inlet pipe 3 and the water outlet pipe 4 will inevitably affect each other, thereby reducing the heat exchange efficiency. In order to further prevent the water inlet pipe 3 and the water outlet pipe 4 from directly transferring heat, the energy pile is also provided with a heat insulation component to block the water inlet pipe 3 and the water outlet pipe 4 from transferring heat through the concrete, thereby reducing the mutual influence between the water inlet pipe 3 and the water outlet pipe 4 and further improving the heat exchange efficiency of the energy pile.

[0072] Specifically, the heat insulation assembly includes a plurality of heat insulation sleeves 8, and the plurality of heat insulation sleeves 8 are arranged in a one-to-one correspondence with the plurality of second energy storage tubes 5. The heat insulation sleeve 8 includes a main body 81 and a claw 82. The cross section of the main body 81 is semicircular (see Figure 3 and Figure 6 ), the main body 81 extends along the length direction of the second energy storage tube 5, and the claws 82 are provided on the main body 81. Each main body 81 is clamped with the second energy storage tube 5 by the claws 82, so that the main body 81 is covered with a corresponding second energy storage tube 5. The structure of the heat-insulating ferrule 8 is simple, easy to manufacture, and convenient for installing the heat-insulating ferrule 8 on the second energy storage tube 5. The main body 81 of the heat-insulating ferrule 8 is covered with the second energy storage tube 5 by the claws 82. The heat-insulating ferrule 8 on each second energy storage tube 5 forms an insulation layer between the water inlet pipe 3 and the water outlet pipe 4, thereby reducing the mutual influence between the water inlet pipe 3 and the water outlet pipe 4, and further improving the heat exchange efficiency of the energy pile. It should be mentioned that the thermal conductivity of the material of the heat-insulating ferrule 8 in this embodiment is less than 0.2W / (mK).

[0073] In this embodiment, claws 82 are provided on both side walls of the main body 81. These claws 82 are in the shape of arc-shaped clamps, facilitating the clamping and installation between the second energy storage tube 5 and the thermal insulation sleeve 8. Multiple claws 82 are provided on each side wall of the main body 81. These claws 82 are spaced apart along the length of the second energy storage tube 5, ensuring a secure connection between the second energy storage tube 5 and the thermal insulation sleeve 8. The multiple claws 82 on the two side walls of the main body 81 are arranged in a one-to-one correspondence. The ends of the claws 82 are each bent to form an inclined guide portion, and the ends of the inclined guide portions on the two corresponding claws 82 extend in opposite directions.

[0074] Since the water inlet pipe 3 and the water outlet pipe 4 are located on opposite sides of the two rows of second energy storage tubes 5, respectively, preferably, the opening of the thermal insulation sleeve 8 on the row of second energy storage tubes 5 near the water inlet pipe 3 is arranged toward the water inlet pipe 3. This allows the energy of the row of second energy storage tubes 5 near the water inlet pipe 3 to exchange heat only with the water inlet pipe 3, preventing the second energy storage tubes 5 in this row from exchanging heat with the water outlet pipe 4. Furthermore, the opening of the thermal insulation sleeve 8 on the row of second energy storage tubes 5 near the water outlet pipe 4 is arranged toward the water outlet pipe 4 (i.e., the opening of the thermal insulation sleeve 8 on one row of second energy storage tubes 5 is arranged opposite to the opening of the corresponding thermal insulation sleeve 8 on the other row of second energy storage tubes 5). This allows the energy of the row of second energy storage tubes 5 near the water outlet pipe 4 to exchange heat only with the water outlet pipe 4, preventing the second energy storage tubes 5 in this row from exchanging heat with the water inlet pipe 3. This approach also improves the heat exchange efficiency between the second energy storage tubes 5 and the water inlet pipe 3 and the water outlet pipe 4.

[0075] Optionally, the phase change material in this embodiment is industrial paraffin or an inorganic composite CaCl·6H 2 O material that eliminates supercooling.

[0076] Specifically, after the steel cage 11, the first energy storage tube 2, the wire mesh 10, the water inlet pipe 3, the water outlet pipe 4, the connecting pipe, the second energy storage tube 5, and the thermal insulation sleeve 8 are assembled, concrete is poured to achieve a relatively fixed connection between the steel cage 11, the first energy storage tube 2, the wire mesh 10, the water inlet pipe 3, the water outlet pipe 4, the connecting pipe, the second energy storage tube 5, and the thermal insulation sleeve 8, and to form the pile body 1. The concrete is poured once and is distributed both inside and outside the steel cage 11. It is understandable that the concrete inside the steel cage 11 can ensure the fixation between the steel cage 11 and the water inlet pipe 3, the water outlet pipe 4, the connecting pipe, the second energy storage tube 5, and the thermal insulation sleeve 8, and the concrete outside the steel cage 11 can ensure the fixation between the steel cage 11 and the first energy storage tube 2 and the wire mesh 10. In order to protect the wire mesh 10 and the first energy storage tube 2, the outer wall of the pile body 1 is located outside the wire mesh 10. Furthermore, the use of concrete pouring also avoids the existence of gaps in the pile body 1, thereby ensuring the heat transfer function of the pile body 1.

[0077] Example 2

[0078] This embodiment provides a method for preparing an energy pile, which is used to prepare an energy pile. The preparation method includes the following steps:

[0079] S1, the phase change material is placed into the hollow packaging tube 6 and sealed with a packaging cap 7;

[0080] S2. Provide two steel meshes 10, fix the first energy storage tube 2 on one of the steel meshes 10, and then place the other steel mesh 10 on the first energy storage tube 2.

[0081] S3, tying the steel cage 11;

[0082] S4, preparing the water inlet pipe 3 and the water outlet pipe 4;

[0083] S5, fixing the prepared water inlet pipe 3 and water outlet pipe 4 on the steel cage 11;

[0084] S6. Clamp multiple heat-insulating sleeves 8 onto corresponding second energy storage tubes 5;

[0085] S7, arranging the plurality of second energy storage tubes 5 into two rows, and arranging the two rows of second energy storage tubes 5 between the water inlet pipe 3 and the water outlet pipe 4;

[0086] S8, fixing the installed plurality of first energy storage tubes 2 and the two steel meshes 10 as a whole to the outside of the steel cage 11 along the circumference of the steel cage 11;

[0087] S9. Pour concrete to make energy piles.

[0088] The energy pile prepared using this method overcomes the shortcomings and deficiencies of phase change concrete energy piles made by aggregate substitution, increases the energy density and heat exchange efficiency of the energy pile, and at the same time, can well ensure the strength of the pile body 1, and the preparation method is simple and easy.

[0089] Specifically, in step S2, a steel mesh 10 is cut to the design dimensions of the energy pile. During the securing process between the first energy storage tube 2 and the two steel meshes 10, the first energy storage tube 2 is secured to the steel meshes 10 using wire or cable ties. The design dimensions of the energy pile body 1 can be selected adaptively and are not limited herein.

[0090] Specifically, in step S3, the steel cage 11 is tied according to the above-mentioned design dimensions. Similarly, in step S4, the water inlet pipe 3 and the water outlet pipe 4 are prepared according to the above-mentioned design dimensions.

[0091] Preferably, in step S7, the opening of the thermal insulation sleeve 8 on the row of second energy storage tubes 5 near the water inlet pipe 3 is arranged toward the water inlet pipe 3, so that the energy of the second energy storage tubes 5 in the row near the water inlet pipe 3 can be heat-exchanged only with the water inlet pipe 3, preventing the second energy storage tubes 5 in this row from heat-exchanging with the water outlet pipe 4; and the opening of the thermal insulation sleeve 8 on the row of second energy storage tubes 5 near the water outlet pipe 4 is arranged toward the water outlet pipe 4, so that the energy of the second energy storage tubes 5 in the row near the water outlet pipe 4 can be heat-exchanged only with the water outlet pipe 4, preventing the second energy storage tubes 5 in this row from heat-exchanging with the water inlet pipe 3. In this way, the heat exchange efficiency between the second energy storage tubes 5 and the water inlet pipe 3 and the water outlet pipe 4 is improved.

[0092] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. An energy pile, characterized in that: include: A pile body (1) comprising a steel cage (11) and concrete; a plurality of first energy storage tubes (2), wherein a phase change material is sealed in the first energy storage tubes (2) and extends along the length direction of the pile body (1); the plurality of first energy storage tubes (2) are all arranged in the pile body (1) and are arranged outside the steel cage (11) along the circumference of the steel cage (11); and a heat exchange component configured to perform heat exchange and thermal cycling on the phase change material; The heat exchange assembly comprises: a heat exchange pipe, comprising a water inlet pipe (3) and a water outlet pipe (4), the water inlet pipe (3) being connected to the water outlet pipe (4), the pipe body of the water inlet pipe (3) and the pipe body of the water outlet pipe (4) being arranged in the pile body (1) at intervals, and the water inlet of the water inlet pipe (3) and the water outlet of the water outlet pipe (4) extending out of the pile body (1); a plurality of second energy storage tubes (5), wherein a phase change material is sealed in the second energy storage tubes (5) and extends along the length direction of the pile body (1); the plurality of second energy storage tubes (5) are all arranged in the pile body (1) and are all located between the water inlet pipe (3) and the water outlet pipe (4); The plurality of second energy storage tubes (5) are arranged in two rows; a heat insulation component configured to block heat transfer between the water inlet pipe (3) and the water outlet pipe (4); The heat insulation assembly comprises: a plurality of heat insulation sleeves (8), the heat insulation sleeves (8) comprising a main body (81) and a clamping claw (82), the main body (81) being semicircular and extending along the length direction of the second energy storage tube (5), the clamping claw (82) being arranged on the main body (81), and each of the main bodies (81) being covered on a corresponding second energy storage tube (5) through the clamping claw (82); The openings of the heat-insulating sleeves (8) on a row of the second energy storage tubes (5) close to the water inlet pipe (3) are arranged toward the water inlet pipe (3), and the openings of the heat-insulating sleeves (8) on a row of the second energy storage tubes (5) close to the water outlet pipe (4) are arranged toward the water outlet pipe (4).

2. The energy pile according to claim 1, characterized in that: The energy pile further comprises two steel meshes (10), the two steel meshes (10) being placed in the pile body (1) and both being arranged on the outside of the steel cage (11) along the circumference of the steel cage (11), a plurality of the first energy storage tubes (2) being placed between the two steel meshes (10), and each of the first energy storage tubes (2) being fixedly connected to the two steel meshes (10).

3. The energy pile according to claim 1, characterized in that: The first energy storage tube (2) and the second energy storage tube (5) both comprise a hollow packaging tube (6) and a packaging cap (7); the packaging cap (7) is arranged to cover the opening of the hollow packaging tube (6); and the phase change material is sealed in the hollow packaging tube (6).

4. A method for preparing an energy pile, characterized in that: For preparing the energy pile according to any one of claims 1 to 3, the preparation method comprises the following steps: S1, placing the phase change material into a hollow packaging tube (6) and sealing it with a packaging cap (7); S2. providing two steel meshes (10), fixing and arranging a plurality of the first energy storage tubes (2) on one of the steel meshes (10), and fixing another steel mesh (10) on the arranged first energy storage tubes (2); S3, tying the steel cage (11); S4, preparing a water inlet pipe (3) and a water outlet pipe (4); S5, fixing the prepared water inlet pipe (3) and the water outlet pipe (4) on the steel cage (11); S6, clamping a plurality of heat-insulating sleeves (8) onto corresponding second energy storage tubes (5); S7, arranging the plurality of second energy storage tubes (5) into two rows, and arranging the two rows of second energy storage tubes (5) between the water inlet pipe (3) and the water outlet pipe (4); S8, fixing the installed plurality of first energy storage tubes (2) and the two steel meshes (10) as a whole to the outside of the steel cage (11) along the circumference of the steel cage (11); S9. Pour concrete.

5. The method for preparing the energy pile according to claim 4, characterized in that: In step S7, the openings of the heat-insulating sleeves (8) on a row of the second energy storage tubes (5) close to the water inlet pipe (3) are oriented toward the water inlet pipe (3), and the openings of the heat-insulating sleeves (8) on a row of the second energy storage tubes (5) close to the water outlet pipe (4) are oriented toward the water outlet pipe (4).

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