Shallow sleeve type ground heat exchanger

Abstract

The utility model belongs to the technical field of tubular heat exchanger equipment, and particularly relates to a shallow sleeve type ground heat exchanger which comprises a straight pipe assembly, a U-shaped pipe assembly and a flange plate assembly, and the straight pipe assembly and the U-shaped pipe assembly are connected in a sealed mode through the flange plate assembly. The straight pipe assembly comprises an inner straight pipe and an outer straight pipe. The U-shaped pipe assembly comprises an inner U-shaped pipe and an outer U-shaped pipe. The flange assembly comprises a first flange and a second flange. The first flange plate and the second flange plate are detachably connected; two clamping blocks are installed at the side end of the first flange plate, inserting holes are formed in the side ends of the clamping blocks, a first gasket is installed at the bottom of the first flange plate, and a plurality of first through grooves are formed in the first gasket; an inserting groove is formed in the bottom of the second flange plate, a sliding groove is formed in the second flange plate, the inserting groove communicates with the sliding groove, a through hole is formed in the side end of the second flange plate, an inserting assembly is arranged at the position of the through hole, a second gasket is installed at the bottom of the second flange plate, and a plurality of second through grooves are formed in the second gasket.

Description

Technical Field

[0001] This utility model belongs to the technical field of tubular heat exchanger equipment, specifically a shallow shell-and-tube buried tube heat exchanger. Background Technology

[0002] Ground source heat pumps are a new type of high-efficiency, energy-saving, and environmentally friendly air conditioning equipment that utilizes shallow geothermal energy for heating and cooling. It leverages the enormous heat and cold storage capacity of underground soil, using a pipe system deeply buried around buildings or under floors to exchange heat between the underground soil and the building. Traditional buried pipe heat exchange systems mainly use horizontal and vertical buried pipe heat exchangers. Vertical buried pipes can save significantly more land than horizontal buried pipes, making them more suitable for China's national conditions. However, existing buried pipe heat exchangers still have the following drawbacks: Ground source heat pump systems commonly use single or double U-shaped pipes and single or double straight pipes. The connection between U-shaped and straight pipes is often not secure.

[0003] Therefore, we propose a shallow-shell buried pipe heat exchanger. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a shallow shell-type buried pipe heat exchanger.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A shallow-shell buried pipe heat exchanger includes:

[0007] Straight pipe assembly, U-tube assembly and flange assembly, wherein the straight pipe assembly and U-tube assembly are sealed and connected by the flange assembly;

[0008] The straight pipe assembly includes an inner straight pipe and an outer straight pipe, and the U-shaped pipe assembly includes an inner U-shaped pipe and an outer U-shaped pipe;

[0009] The flange assembly includes a first flange and a second flange; the first flange and the second flange are detachably connected.

[0010] Two snap-fit ​​blocks are fixedly installed on the side of the first flange, and the snap-fit ​​blocks have insertion holes on their side. A first gasket is fixedly installed on the bottom of the first flange, and the first gasket has multiple first through grooves. A slot is opened on the bottom of the second flange, and the slot is adapted to the snap-fit ​​blocks. A sliding groove is opened inside the second flange, and the slot communicates with the sliding groove. The snap-fit ​​blocks are adapted to the sliding groove. A through hole is opened on the side of the second flange, and an insertion assembly is provided at the through hole. A second gasket is fixedly installed on the bottom of the second flange, and the second gasket has multiple second through grooves.

[0011] Furthermore, the first flange side end is provided with a first connecting part, the first gasket side end is provided with a second connecting part, the outer straight pipe is threadedly connected to the first connecting part, and the inner straight pipe is threadedly connected to the second connecting part.

[0012] Furthermore, a third connecting part is provided on the side end of the second flange, and a fourth connecting part is provided on the side end of the second gasket;

[0013] The outer U-shaped tube is threaded to the third connecting part, and the inner U-shaped tube is threaded to the fourth connecting part.

[0014] Furthermore, a first outer cavity is formed between the inner straight pipe and the outer straight pipe, and a second outer cavity is formed between the inner U-shaped pipe and the outer U-shaped pipe. The first outer cavity and the second outer cavity are connected to the first through groove and the second through groove. The interior of the inner straight pipe is the first inner cavity, and the interior of the inner U-shaped pipe is the second inner cavity. The first inner cavity, the second inner cavity, and the interior of the flange assembly are connected.

[0015] Furthermore, the plug-in assembly includes a pin, a connecting plate, and a connecting spring. The connecting plate is connected to the outside of the second flange via two connecting springs. The pin is fixedly connected to the side end of the connecting plate, and the end of the pin away from the connecting plate is inserted into the through hole.

[0016] Furthermore, both the inner straight tube and the inner U-shaped tube are made of plastic, while both the outer straight tube and the outer U-shaped tube are made of metal.

[0017] The explanations of the nouns, conjunctions, or adjectives used in the above technical solutions are as follows:

[0018] Fixed connection: refers to a connection in which parts or components are fixed in place and there is no relative movement. It is divided into two types: detachable connection and non-detachable connection.

[0019] (1) Detachable connection: The components are fixed together using screws, splines, wedges, etc. This type of connection can be disassembled during maintenance without damaging the parts. However, the specifications of the connecting parts used must be correct (such as the length of the bolts, keys, wedges) and properly tightened.

[0020] (2) Non-removable connections: These mainly refer to welding, riveting, and tenon joints. Since disassembly requires forging, sawing, or oxyacetylene cutting for repair or replacement, the parts generally cannot be reused. At the same time, attention should be paid to process quality, technical inspection, and remedial measures (such as correction, polishing, etc.) when making connections.

[0021] The beneficial effects of this utility model are as follows: the shell-and-tube buried pipe heat exchanger can be combined into multiple different types of heat exchangers according to the terrain requirements through the connection between multiple straight pipe assemblies, U-shaped pipe assemblies and flange assemblies. Moreover, the flanges are detachably connected through the first flange and the second flange, which makes the installation relatively simple and convenient. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall device according to an embodiment of the present invention;

[0024] Figure 2 This is a cross-sectional view of the straight pipe assembly, U-shaped pipe assembly, and flange assembly connected according to an embodiment of this utility model;

[0025] Figure 3 This is a schematic diagram of the flange assembly according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the first flange in this embodiment of the utility model. Figure 1 ;

[0027] Figure 5 This is a schematic diagram of the structure of the first flange in this embodiment of the utility model. Figure 2 ;

[0028] Figure 6 This is a schematic diagram of the structure of the second flange in this embodiment of the utility model. Figure 1 ;

[0029] Figure 7 This is a schematic diagram of the structure of the second flange in this embodiment of the utility model. Figure 2 .

[0030] Reference numerals: 1. Straight pipe assembly; 2. U-shaped pipe assembly; 3. Flange assembly; 4. Inner straight pipe; 5. Outer straight pipe; 6. Inner U-shaped pipe; 7. Outer U-shaped pipe; 8. First flange; 9. Second flange; 10. Snap-fit ​​block; 11. Insertion hole; 12. First gasket; 13. First through groove; 14. Slot; 15. Slide groove; 16. Through hole; 17. Insertion assembly; 18. Second gasket; 19. Second through groove; 20. First connecting part; 21. Second connecting part; 22. Third connecting part; 23. Fourth connecting part; 24. First outer cavity; 25. Second outer cavity; 26. First inner cavity; 27. Second inner cavity; 28. Pin; 29. ​​Connecting plate; 30. Connecting spring. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0032] A shallow-shell buried pipe heat exchanger, such as Figures 1-7 As shown, it includes:

[0033] Straight pipe assembly 1, U-shaped pipe assembly 2, and flange assembly 3, wherein the straight pipe assembly 1 and U-shaped pipe assembly 2 are sealed and connected by flange assembly 3;

[0034] The straight pipe assembly 1 includes an inner straight pipe 4 and an outer straight pipe 5, and the U-shaped pipe assembly 2 includes an inner U-shaped pipe 6 and an outer U-shaped pipe 7;

[0035] The flange assembly 3 includes a first flange 8 and a second flange 9; the first flange 8 and the second flange 9 are detachably connected.

[0036] Two snap-fit ​​blocks 10 are fixedly installed on the side of the first flange 8. The snap-fit ​​blocks 10 have insertion holes 11 on their side. A first gasket 12 is fixedly installed on the bottom of the first flange 8. The first gasket 12 has multiple first through grooves 13. A slot 14 is opened on the bottom of the second flange 9. The slot 14 is adapted to the snap-fit ​​blocks 10. A sliding groove 15 is opened inside the second flange 9. The slot 14 communicates with the sliding groove 15. The snap-fit ​​blocks 10 are adapted to the sliding groove 15. A through hole 16 is opened on the side of the second flange 9. An insertion assembly 17 is provided at the through hole 16. A second gasket 18 is fixedly installed on the bottom of the second flange 9. The second gasket 18 has multiple second through grooves 19.

[0037] In this invention, the shallow-shell buried pipe heat exchanger can be assembled using multiple straight pipe assemblies 1 and multiple U-shaped pipe assemblies 2. Each U-shaped pipe assembly 2 has a flange assembly 3 installed at its end. When there are n U-shaped pipe assemblies 2, there are (n+1) straight pipe assemblies 1. During installation, the flange assembly 3 is first installed on the U-shaped pipe assembly 2, and then the straight pipe assembly 1 is installed. The specific installation steps between flange assemblies 3 are as follows: Align the snap-fit ​​block 10 on the mounting side of the first flange 8 with the slot 14 on the mounting bottom of the second flange 9. Then, insert the snap-fit ​​block 10 into the slot 14 and place it in the slide groove 15. Then, rotate the first flange 8 to align the insertion hole 11 on the side of the snap-fit ​​block 10 with the through hole 16 on the side of the second flange 9. Insert the pin 28 through the through hole 16 and place it in the insertion hole 11. At this time, the pin 28 fixes the first flange 8 and the second flange 9. The first flange 8 and the second flange 9 can also be further fixed by screws and nuts.

[0038] It should be noted that after the first flange 8 is rotated 90 degrees, the snap-fit ​​block 10 can slide from one end of the slide groove 15 to the other. That is, after the snap-fit ​​block 10 passes through the slot 14 and is placed in the slide groove 15, rotating the first flange 8 90 degrees will align the first socket 11 with the second socket 11. It should also be noted that when inserting the snap-fit ​​block 10 into the slide groove 15, the pin 28 needs to be pulled out. After the first socket 11 and the second socket 11 are aligned, the pin 28 is then passed through the second socket 11 and placed back into the first socket 11.

[0039] As a preferred embodiment of this utility model, the first flange 8 is provided with a first connecting part 20 on its side, the first gasket 12 is provided with a second connecting part 21 on its side, the outer straight pipe 5 is threadedly connected to the first connecting part 20, and the inner straight pipe 4 is threadedly connected to the second connecting part 21.

[0040] As a preferred embodiment of this utility model, the second flange 9 is provided with a third connecting part 22 on its side, and the second gasket 18 is provided with a fourth connecting part 23 on its side; the outer U-shaped tube 7 is threadedly connected to the third connecting part 22, and the inner U-shaped tube 6 is threadedly connected to the fourth connecting part 23.

[0041] In a preferred embodiment of this utility model, a first outer cavity 24 is formed between the inner straight pipe 4 and the outer straight pipe 5, and a second outer cavity 25 is formed between the inner U-shaped pipe 6 and the outer U-shaped pipe 7. The first outer cavity 24 and the second outer cavity 25 are connected to the first through groove 13 and the second through groove 19. The inner straight pipe 4 has a first inner cavity 26 inside, and the inner U-shaped pipe 6 has a second inner cavity 27 inside. The first inner cavity 26, the second inner cavity 27 and the flange assembly 3 are connected inside.

[0042] It should be noted that the first outer cavity 24 and the second outer cavity 25 are for the entry of cold water, while the first inner cavity 26 and the second inner cavity 27 are for the outflow of heated hot water, thereby realizing the circulation of water inside the heat exchanger and achieving the purpose of heat exchange.

[0043] In a preferred embodiment of this utility model, the plug-in assembly 17 includes a pin 28, a connecting plate 29, and connecting springs 30. The connecting plate 29 is connected to the outer side of the second flange 9 via two connecting springs 30. The pin 28 is fixedly connected to the side end of the connecting plate 29, with one end of the pin 28 away from the connecting plate 29 inserted into the through hole 16. The plug-in assembly 17 is mainly used to achieve a detachable connection between the first flange 8 and the second flange 9 assembly 3.

[0044] In a preferred embodiment of this utility model, the inner straight tube 4 and the inner U-shaped tube 6 are both made of plastic, while the outer straight tube 5 and the outer U-shaped tube 7 are both made of metal.

[0045] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. 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 any suitable manner in one or more embodiments or examples.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims of this utility model.

Claims

1. A shallow-shell buried pipe heat exchanger, characterized in that, include: Straight pipe assembly (1), U-tube assembly (2) and flange assembly (3), wherein the straight pipe assembly (1) and U-tube assembly (2) are sealed together by flange assembly (3); The straight pipe assembly (1) includes an inner straight pipe (4) and an outer straight pipe (5), and the U-shaped pipe assembly (2) includes an inner U-shaped pipe (6) and an outer U-shaped pipe (7). The flange assembly (3) includes a first flange (8) and a second flange (9); the first flange (8) and the second flange (9) are detachably connected. Two snap-fit ​​blocks (10) are fixedly installed on the side of the first flange (8). The snap-fit ​​blocks (10) have insertion holes (11) on their side. A first gasket (12) is fixedly installed on the bottom of the first flange (8). Multiple first through grooves (13) are provided on the first gasket (12). A slot (14) is provided on the bottom of the second flange (9). The slot (14) is adapted to the snap-fit ​​blocks (10). A sliding groove (15) is provided inside the second flange (9). The slot (14) is connected to the sliding groove (15). The snap-fit ​​blocks (10) are adapted to the sliding groove (15). A through hole (16) is provided on the side of the second flange (9). A plug-in assembly (17) is provided at the through hole (16). A second gasket (18) is fixedly installed on the bottom of the second flange (9). Multiple second through grooves (19) are provided on the second gasket (18).

2. A shallow-shell buried pipe heat exchanger according to claim 1, characterized in that, The first flange (8) is provided with a first connecting part (20) on its side end, and the first gasket (12) is provided with a second connecting part (21) on its side end. The outer straight pipe (5) is threadedly connected to the first connecting part (20), and the inner straight pipe (4) is threadedly connected to the second connecting part (21).

3. A shallow-shell buried pipe heat exchanger according to claim 1, characterized in that, The second flange (9) is provided with a third connecting part (22) on its side end, and the second gasket (18) is provided with a fourth connecting part (23) on its side end. The outer U-shaped tube (7) is threaded to the third connecting part (22), and the inner U-shaped tube (6) is threaded to the fourth connecting part (23).

4. A shallow-shell buried pipe heat exchanger according to claim 1, characterized in that, A first outer cavity (24) is formed between the inner straight pipe (4) and the outer straight pipe (5), and a second outer cavity (25) is formed between the inner U-shaped pipe (6) and the outer U-shaped pipe (7). The first outer cavity (24) and the second outer cavity (25) are connected to the first through groove (13) and the second through groove (19). The inner straight pipe (4) has a first inner cavity (26) inside, and the inner U-shaped pipe (6) has a second inner cavity (27) inside. The first inner cavity (26), the second inner cavity (27) and the flange assembly (3) are connected inside.

5. A shallow-shell buried pipe heat exchanger according to claim 1, characterized in that, The plug assembly (17) includes a pin (28), a connecting plate (29), and a connecting spring (30). The connecting plate (29) is connected to the outside of the second flange (9) through two connecting springs (30). The pin (28) is fixedly connected to the side end of the connecting plate (29). The end of the pin (28) away from the connecting plate (29) is inserted into the through hole (16).

6. A shallow-shell buried pipe heat exchanger according to claim 1, characterized in that, The inner straight tube (4) and the inner U-shaped tube (6) are both made of plastic, while the outer straight tube (5) and the outer U-shaped tube (7) are both made of metal.

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