Self-adaptive connecting structure of underground heat exchanger of modularized ground source heat pump

Abstract

The utility model discloses a self-adaptive connecting structure of a modularized ground source heat pump underground heat exchanger, and belongs to the technical field of heat exchanger connection, the upper end of a U-shaped bottom pipeline is connected with a modularized assembly pipe through a modularized assembly pipe, the side wall of the modularized assembly pipe is provided with a first auxiliary pipeline, the upper end of the modularized assembly pipe is connected with a connecting pipeline, and the lower end of the connecting pipeline is provided with a second auxiliary pipeline. A second auxiliary pipeline is installed on the side wall of the connecting pipeline. The modular pipeline design allows the heat exchanger to be flexibly installed under different geological conditions, and adaptability and flexibility are improved. By means of connection of the modular assembly pipes and the assembly pipes and cooperation of the protruding columns and the sunken grooves, rapid and accurate pipeline connection is achieved, and installation efficiency is simplified and improved. The inner supporting mechanism enhances the stability of the heat exchanger through the cooperation of an inner supporting frame and a supporting rod. And the inner support frame is tightly contacted and fixed with the modularized pipe fitting, so that the pipeline is prevented from being deformed and loosened, and stable operation is ensured. The design facilitates installation and adjustment, and installation accuracy is improved.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger connection technology, and in particular to an adaptive connection structure for a modular ground source heat pump underground heat exchanger. Background Technology

[0002] A ground source heat pump is a highly efficient and energy-saving air conditioning and heating system. It utilizes shallow geothermal resources as a heat source and cold source, converting energy through heat pump technology to provide buildings with winter heating, summer cooling, and year-round domestic hot water. The underground heat exchanger mainly consists of high-density polyethylene pipes (or other high-strength plastic pipes) buried underground for heat exchange with the soil or groundwater. Depending on the heat exchange medium, geothermal energy exchange systems can be divided into closed systems (buried pipe systems) and open systems (groundwater or surface water systems). In terms of connection structure, the underground heat exchanger is connected to the above-ground heat pump unit via pipes, forming a closed-loop system. In this system, water or antifreeze acts as the heat carrier, circulating between the underground heat exchanger and the above-ground heat pump heat exchanger (evaporator or condenser). Through heat pump technology, the system can extract heat or cold from underground and deliver it to areas requiring heating (cooling) loads.

[0003] In ground source heat pump systems, the connection structure of the underground heat exchanger is crucial for achieving efficient heat exchange. However, in actual installation, due to the use of multi-pipe assembly, flanges and bolts are typically used for fixing at the connections. During the operation of the ground source heat pump, the piping system undergoes thermal expansion and contraction due to the temperature difference between the underground and surface areas. This physical change causes the flanges and bolts at the connections to bear additional stress, which, over time, may lead to loosening or damage. Once a problem occurs at the connection, the heat exchange efficiency will drop significantly, and it may even cause the entire system to fail.

[0004] The underground environment is complex and variable; chemicals, moisture, and microorganisms in the soil can all corrode pipe materials. Especially in cases of hard water or water containing corrosive substances, flanges and bolts at connections are more susceptible to corrosion. Corrosion not only weakens the joints but can also lead to sealing failure, resulting in leaks and other problems. Utility Model Content

[0005] The main purpose of this invention is to provide an adaptive connection structure for a modular ground source heat pump underground heat exchanger, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] The adaptive connection structure of the modular ground source heat pump underground heat exchanger includes a U-shaped bottom pipe; the upper end of the U-shaped bottom pipe is connected to a modular assembly pipe through a modular assembly pipe, and a first auxiliary pipe is installed on the side wall of the modular assembly pipe; the upper end of the modular assembly pipe is connected to a connecting pipe, and a second auxiliary pipe is installed on the side wall of the connecting pipe; a top opening and closing door is installed on the upper end of the connecting pipe; the U-shaped bottom pipe, the modular assembly pipe, and the modular assembly pipe are backfilled into the underground well.

[0008] An inner support frame is installed at the top of the U-shaped bottom pipe. The inner support frame contacts the modular assembly pipe and the modular assembly pipe, and is fixed by fasteners. The inner wall of the inner support frame is provided with multiple internal support rods, and multiple first stabilizing isolation plates and second stabilizing isolation plates are provided between the multiple internal support rods, thereby realizing the firm assembly of the modular assembly pipe and the modular assembly pipe.

[0009] In an optional embodiment of this utility model, the lower end of the modular assembly pipe is provided with multiple protruding posts, the upper end of the U-shaped bottom pipe is provided with a recessed groove adapted to the protruding posts, the lower end of the modular assembly pipe is provided with multiple protruding posts, the upper end of the modular assembly pipe is provided with a recessed groove adapted to the protruding posts, and a sealing ring is provided at the connection between the U-shaped bottom pipe, the modular assembly pipe and the modular assembly pipe.

[0010] In an optional embodiment of this utility model, two first auxiliary pipes are symmetrically arranged on the modular assembly pipe. The first auxiliary pipes of the two modular assembly pipes are fixed by connecting flanges, bolts and nuts, thereby realizing the connection between the two modular assembly pipes. The connecting pipe and the modular assembly pipe are welded and fixed, and the upper and lower ends of the connecting pipe are provided with connecting flanges.

[0011] In an optional embodiment of this utility model, two second auxiliary pipes are symmetrically arranged on the top pipe. The second auxiliary pipes of the two top pipes are fixed by connecting flanges, bolts and nuts, thereby realizing the connection between the two top pipes. The top opening and closing door is welded and fixed to the top pipe.

[0012] In an optional embodiment of this utility model, the inner support frame is composed of multiple support rings and support bars. Each support ring is equidistantly distributed within the modular assembly tube and the modular assembly tube, and adjacent support rings are connected by support bars.

[0013] In an optional embodiment of this utility model, the four internal support rods are symmetrically distributed on the support ring, and the internal support rods are fixed to the support ring by bolts. The first stabilizing isolation plate and the second stabilizing isolation plate are fixed to the internal support rods by bolts. Anti-slip pads are provided at the connection points. The first stabilizing isolation plate and the second stabilizing isolation plate are equidistantly distributed.

[0014] In an optional embodiment of this utility model, the end faces of the first stabilizing isolation plate and the second stabilizing isolation plate are provided with multiple through holes, which are equidistantly distributed.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The modular piping design allows for flexible installation and adjustment of heat exchangers under different geological conditions, enhancing the equipment's adaptability and flexibility. Through the connection of modular assembly pipes and the cooperation of protruding columns and recessed grooves, rapid and accurate connections between pipes are achieved, simplifying the installation process and improving installation efficiency.

[0017] The internal support mechanism, through the cooperation of the internal support frame and multiple internal support rods, effectively enhances the overall stability of the heat exchanger. The close contact and fixation between the internal support frame and the modular assembly pipes prevents deformation and loosening of the pipelines during long-term operation, ensuring the stable operation of the heat exchanger. At the same time, the design of the internal support frame facilitates adjustment and positioning during installation, improving installation accuracy.

[0018] The support and stabilization mechanism further enhances the stability of the heat exchanger through the installation of a first and second stabilizing isolation plate. The robust connection between the isolation plates and the use of anti-slip pads effectively prevent loosening and slippage between the support rod and the isolation plates, improving connection reliability. Furthermore, the through holes in the isolation plates not only reduce their weight but also facilitate the flow of liquids or gases during installation, thereby improving heat exchange efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This utility model includes two sets of internal support frames, a stabilizing isolation plate, a secondary pipe, a connecting pipe, and a top opening and closing door.

[0021] Figure 3 This utility model includes a single-unit internal support frame, a stabilizing isolation plate, a secondary pipe, a connecting pipe, and a top opening / closing door.

[0022] Figure 4 for Figure 3 Enlarged diagram of point A in the middle.

[0023] In the diagram: 1. U-shaped bottom pipe; 2. Modular assembly pipe; 3. Modular assembly pipe; 4. First secondary pipe; 5. Connecting pipe; 6. Top pipe; 7. Second secondary pipe; 8. Top opening door; 9. Internal support rod; 10. First stabilizing isolation plate; 11. Second stabilizing isolation plate; 12. Through hole; 13. Internal support frame. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] like Figure 1 - Figure 4 As shown, the modular ground source heat pump underground heat exchanger has an adaptive connection structure, comprising a U-shaped bottom pipe 1. The upper end of the U-shaped bottom pipe 1 is connected to the modular assembly pipe 3 via a modular assembly pipe 2. A first auxiliary pipe 4 is installed on the side wall of the modular assembly pipe 3. A connecting pipe 5 is connected to the upper end of the modular assembly pipe 3. A second auxiliary pipe 7 is installed on the side wall of the connecting pipe 5. A top opening and closing valve 8 is installed at the upper end of the connecting pipe 5. The U-shaped bottom pipe 1, modular assembly pipe 2, and modular assembly pipe 3 all need to be backfilled into the underground well. This design allows the heat exchanger to be flexibly installed and adjusted under different geological conditions to adapt to various complex underground environments.

[0026] An inner support frame 13 is installed at the top inner part of the U-shaped bottom pipe 1. The inner support frame 13 contacts the modular assembly pipe 2 and the modular assembly pipe 3, and is fixed by fasteners. The inner wall of the inner support frame 13 is provided with multiple internal support rods 9, and multiple first stabilizing isolation plates 10 and second stabilizing isolation plates 11 are arranged between the multiple internal support rods 9, thereby achieving a secure assembly of the modular assembly pipe 2 and the modular assembly pipe 3. This structural design not only improves the stability of the heat exchanger but also ensures its reliability during long-term operation.

[0027] The lower end of the modular assembly pipe 2 has multiple protruding columns, and the upper end of the U-shaped bottom pipe 1 has recessed grooves that match these protruding columns. Similarly, the lower end of the modular assembly pipe 3 also has multiple protruding columns, while the upper end of the modular assembly pipe 2 has recessed grooves that match these protruding columns. Sealing rings are installed at the connections of the U-shaped bottom pipe 1, modular assembly pipe 2, and modular assembly pipe 3 to ensure a tight seal. This design effectively prevents groundwater infiltration during installation and operation, ensuring the safety and efficiency of the system.

[0028] Two first auxiliary pipes 4 are symmetrically arranged on the modular assembly pipe 3. The first auxiliary pipes 4 of the two modular assembly pipes 3 are fixed together by connecting flanges, bolts, and nuts, thereby achieving the connection between the two modular assembly pipes 3. The connecting pipe 5 is fixed to the modular assembly pipe 3 by welding, and both the upper and lower ends of the connecting pipe 5 are equipped with connecting flanges. This connection method not only ensures a firm connection between the pipes, but also facilitates later maintenance and repair.

[0029] Two secondary auxiliary pipes 7 are symmetrically arranged on the top pipe 6. The two secondary auxiliary pipes 7 of the two top pipes 6 are fixed together by connecting flanges, bolts, and nuts, thereby connecting the two top pipes 6. The top opening and closing door 8 is fixed to the top pipe 6 by welding. This design makes the maintenance and repair of the top pipe 6 more convenient and quick, and also improves the safety of the entire heat exchange system.

[0030] The inner support frame 13 consists of multiple support rings and support bars. Each support ring is equidistantly distributed within the modular assembly tube 2 and the modular assembly tube 3, and adjacent support rings are connected by support bars. This structural design not only enhances the overall stability of the heat exchanger but also facilitates adjustment and positioning during installation.

[0031] Four internal support rods 9 are symmetrically distributed on the support ring and are fixed to the support ring with bolts. A first stabilizing isolation plate 10 and a second stabilizing isolation plate 11 are fixed to the internal support rods 9 with bolts, and anti-slip pads are provided at the connection points. The first stabilizing isolation plate 10 and the second stabilizing isolation plate 11 are equidistantly distributed. This design ensures a secure connection between the support rods and the isolation plates, while the use of anti-slip pads further improves the reliability of the connection.

[0032] The first stabilizing isolation plate 10 and the second stabilizing isolation plate 11 have multiple through holes 12 on their end faces, which are equidistantly distributed. The design of the through holes 12 not only reduces the weight of the isolation plate, but also facilitates the flow of liquid or gas during installation, thereby improving the heat exchange efficiency.

[0033] Place the U-shaped bottom pipe 1 in the predetermined position. Insert the lower protruding post of the modular assembly pipe 2 into the recessed groove at the upper end of the U-shaped bottom pipe 1. Install the inner support frame 13 at the top inside the U-shaped bottom pipe 1, ensuring it is in contact with the modular assembly pipe 2, and secure it with fasteners. Install multiple internal support rods 9 on the inner wall of the inner support frame 13 and secure them with bolts. Secure the first stabilizing isolation plate 10 and the second stabilizing isolation plate 11 to the internal support rods 9 with bolts, ensuring that there are anti-slip pads at the connection points.

[0034] Install modular assembly pipe 3 on the upper end of modular assembly pipe 2, ensuring that its lower protruding post is inserted into the recessed groove at the upper end of modular assembly pipe 2. Install the first auxiliary pipe 4 on the side wall of modular assembly pipe 3 and secure it with connecting flanges, bolts, and nuts. Fix connecting pipe 5 to modular assembly pipe 3 by welding, ensuring that connecting flanges are at the upper and lower ends of connecting pipe 5. Install the second auxiliary pipe 7 on the side wall of connecting pipe 5 and secure it with connecting flanges, bolts, and nuts.

[0035] The two modular assembly pipes 3 are connected by fixing them together with connecting flanges, bolts, and nuts. The top opening door 8 is fixed to the top pipe 6 by welding, and the second auxiliary pipe 7 of the top pipe 6 is also fixed with connecting flanges, bolts, and nuts. Ensure that all connections are equipped with sealing rings to guarantee the airtightness of the connections. After installation, backfill the U-shaped bottom pipe 1, modular assembly pipe 2, and modular assembly pipe 3 into the underground well.

[0036] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0037] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. An adaptive connection structure for a modular ground source heat pump underground heat exchanger, comprising a U-shaped bottom pipe (1), characterized in that: The upper end of the U-shaped bottom pipe (1) is connected to the modular assembly pipe (3) via the modular assembly pipe (2), and the side wall of the modular assembly pipe (3) is equipped with a first auxiliary pipe (4). The upper end of the modular assembly pipe (3) is connected to the connecting pipe (5), and the side wall of the connecting pipe (5) is equipped with a second auxiliary pipe (7). The upper end of the connecting pipe (5) is equipped with a top opening and closing door (8). The U-shaped bottom pipe (1), the modular assembly pipe (2) and the modular assembly pipe (3) are backfilled into the underground well. An inner support frame (13) is installed on the inner top of the U-shaped bottom pipe (1). The inner support frame (13) contacts the modular assembly pipe (2) and the modular assembly pipe (3), and the inner support frame (13), the modular assembly pipe (2) and the modular assembly pipe (3) are fixed by fasteners. The inner wall of the inner support frame (13) is provided with multiple internal support rods (9), and multiple first stabilizing isolation plates (10) and second stabilizing isolation plates (11) are provided between the multiple internal support rods (9), thereby realizing the firm assembly of the modular assembly pipe (2) and the modular assembly pipe (3).

2. The adaptive connection structure of the modular ground source heat pump underground heat exchanger according to claim 1, characterized in that: The lower end of the modular assembly pipe (2) is provided with multiple protruding columns, and the upper end of the U-shaped bottom pipe (1) is provided with a recessed groove adapted to the protruding columns. The lower end of the modular assembly pipe (3) is provided with multiple protruding columns, and the upper end of the modular assembly pipe (2) is provided with a recessed groove adapted to the protruding columns. A sealing ring is provided at the connection between the U-shaped bottom pipe (1), the modular assembly pipe (2), and the modular assembly pipe (3).

3. The adaptive connection structure of the modular ground source heat pump underground heat exchanger according to claim 2, characterized in that: Two first auxiliary pipes (4) are symmetrically arranged on the modular assembly pipe (3). The first auxiliary pipes (4) of the two modular assembly pipes (3) are fixed by connecting flanges, bolts and nuts, thereby realizing the connection between the two modular assembly pipes (3). The connecting pipe (5) and the modular assembly pipe (3) are welded and fixed. The upper and lower ends of the connecting pipe (5) are provided with connecting flanges.

4. The adaptive connection structure of the modular ground source heat pump underground heat exchanger according to claim 3, characterized in that: Two second auxiliary pipes (7) are symmetrically arranged on the top pipe (6). The second auxiliary pipes (7) of the two top pipes (6) are fixed by connecting flanges, bolts and nuts, thereby realizing the connection between the two top pipes (6). The top opening and closing door (8) is welded and fixed to the top pipe (6).

5. The adaptive connection structure of the modular ground source heat pump underground heat exchanger according to claim 4, characterized in that: The inner support frame (13) consists of multiple support rings and support bars. Each support ring is equidistantly distributed in the modular assembly tube (2) and the modular assembly tube (3). Adjacent support rings are connected by support bars.

6. The adaptive connection structure of the modular ground source heat pump underground heat exchanger according to claim 5, characterized in that: The four internal support rods (9) are symmetrically distributed on the support ring. The internal support rods (9) are fixed to the support ring by bolts. The first stabilizing isolation plate (10) and the second stabilizing isolation plate (11) are fixed to the internal support rods (9) by bolts. Anti-slip pads are provided at the connection. The first stabilizing isolation plate (10) and the second stabilizing isolation plate (11) are equidistantly distributed.

7. The adaptive connection structure of the modular ground source heat pump underground heat exchanger according to claim 6, characterized in that: The end faces of the first stabilizing isolation plate (10) and the second stabilizing isolation plate (11) are provided with multiple through holes (12), which are equidistantly distributed.

Images