CN216845800U - Underground concentric sleeve type heat exchanger - Google Patents

Abstract

The utility model provides a bury concentric double pipe heat exchanger, a serial communication port, include: a water return pipe 2; a cover plate 3; a water return pipe heat insulation sleeve 4; a heat insulating layer 5; a circulating water inlet channel 6; a water inlet pipe 7; a fin 8; a water return channel 9; a water inlet pipe bottom plate 10; a geothermal well 11; a groove 12 on the outer wall of the water inlet pipe; a groove 13 on the inner wall of the water inlet pipe. The utility model discloses an implement, a bury concentric double pipe heat exchanger is provided, heat exchanger inlet tube, wet return are concentric structure, and the wet return setting is in water intake pipe, and the circulating water is intake and is flowed between inlet tube and wet return and absorb secret heat, and the circulating water after the absorption heat flows from middle wet return, sets up fin and recess in the inlet tube outside, as much as possible absorption heat, and the wet return sets up bilayer structure, reduces the thermal scattering and disappearing of return water as far as.

Description

Underground concentric sleeve type heat exchanger

Technical Field

The utility model relates to a ground source heat pump is heat exchanger technical field in the pit, indicates especially that one kind buries concentric double pipe heat exchanger.

Background

With the requirements of energy conservation and emission reduction of China, low-temperature geothermal resources are an important energy-saving direction in the field of winter heating, the geothermal resources can be divided into a shallow layer, a middle layer and a deep layer, the geothermal temperature gradually rises along with the increase of the depth, the temperature can reach 100 ℃ at the depth of about 3000 meters, the depth of the middle layer and the shallow layer is mostly adopted for geothermal wells heated by ground source heat pumps, the temperature usually does not exceed 25 ℃, the heat pump technology is to extract low-grade heat contained in underground soil, rocks and the like through circulating water and convert the low-grade heat into high-quality heat for utilization, and therefore the high-efficiency utilization of geothermal clean energy can be achieved.

The pipe orifice size of the in-situ geothermal well is generally not too large, the heat exchanger is generally in a single U-shaped pipe or double U-shaped pipe structure, the pipe diameter of the U-shaped pipe is also limited by the size of the geothermal well, the pipe orifice size is not too large, the heat exchange efficiency is lower, and the heat extraction effect is poor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a bury concentric double pipe heat exchanger, underground heat exchanger inlet tube, wet return are concentric structure, and the wet return setting is in the water intake pipe, and the circulating water is intake and is flowed between inlet tube and wet return and absorb secret heat, and the circulating water after the absorption heat flows from middle wet return, sets up fin and recess in the inlet tube outside, as much as possible absorption heat, and the wet return sets up bilayer structure, reduces the thermal scattering and disappearing of return as far as. In order to achieve the above purpose, the utility model adopts the following technical scheme:

an underground concentric sleeve type heat exchanger comprises a water return pipe; a cover plate; a heat-insulating sleeve of the water return pipe; a heat insulating layer; a circulating water inlet channel; a water inlet pipe; a fin; a water return channel; a water inlet pipe bottom plate; a geothermal well; a groove is arranged on the outer wall of the water inlet pipe; the inner wall of the water inlet pipe is provided with grooves.

Optionally, a water return pipe and a water inlet pipe of the underground concentric sleeve pipe type heat exchanger are of a concentric structure, the water return pipe is arranged in the water inlet pipe, circulating water inflows between the water inlet pipe and the water return pipe to flow and absorb underground heat, and circulating water after absorbing heat flows out of the water return pipe;

optionally, a heat insulation structure is arranged on the outer surface of the water return pipe to reduce heat loss of return water, and the heat insulation structure is a closed space formed by a water return pipe heat insulation sleeve, a heat insulation layer and a cover plate;

optionally, the water return pipe is composed of a standard long pipe, and the length of the heat-insulating sleeve of the water return pipe is shorter than that of the standard pipe, so that connection among all sections of the water return pipe is prevented from being influenced;

optionally, a hollow structure is formed between the return water heat-insulating sleeve and the return water pipe, heat-insulating materials are brushed on the outer wall of the return water pipe, and heat-insulating materials are filled in the hollow space between the return water heat-insulating sleeve and the return water pipe and are vacuumized;

optionally, the outer wall of the water inlet pipe is provided with a plurality of fins, so that the heat exchange area of the outer wall of the water inlet pipe can be increased, and the heat exchange capacity is increased;

optionally, the outer wall of the water inlet pipe is provided with a groove of the outer wall of the water inlet pipe, and the inner wall of the water inlet pipe is provided with a groove of the inner wall of the water inlet pipe, so that the heat exchange area of the water inlet pipe can be increased, and the heat exchange capacity is increased;

optionally, the water return pipe and the water inlet pipe have certain spaces at the bottoms, so that a certain amount of impurities can be contained, and the pipeline is prevented from being blocked;

drawings

Embodiments of the present invention are described in detail below with reference to the attached drawing figures, wherein:

FIG. 1 shows a buried concentric double pipe heat exchanger according to an embodiment of the present invention

FIG. 2 is a cross-sectional view of a buried concentric double pipe heat exchanger according to an embodiment of the present invention

Description of reference numerals:

1. an underground concentric double pipe heat exchanger; 2. a water return pipe; 3. a cover plate; 4. a heat-insulating sleeve of the water return pipe; 5. a heat insulating layer; 6. a circulating water inlet channel; 7. a water inlet pipe; 8. a fin; 9. a water return channel; 10. a water inlet pipe bottom plate; 11. a geothermal well; 12. a groove is arranged on the outer wall of the water inlet pipe; 13. inner wall groove of water inlet pipe

Detailed Description

Referring now to the drawings, an illustrative version of a buried concentric double pipe heat exchanger as disclosed in the present invention will be described in detail. Although the drawings are provided to present some embodiments of the invention, the drawings are not necessarily to scale of particular embodiments, and certain features may be exaggerated, removed, or partially sectioned to better illustrate and explain the disclosure of the present invention. The appearances of the phrase "in the drawings" or similar language in the specification are not necessarily referring to all drawings or examples.

The term "about" or "approximately" in the present application will be understood by those of ordinary skill in the art and will vary to some extent depending on the context in which the term is used.

As shown in fig. 1, an underground concentric double pipe heat exchanger according to an embodiment of the present invention includes an underground concentric double pipe heat exchanger 1; a water return pipe 2; a cover plate 3; a water return pipe heat insulation sleeve 4; a heat insulating layer 5; a circulating water inlet channel 6; a water inlet pipe 7; a fin 8; a water return channel 9; a water inlet pipe bottom plate 10; a geothermal well 11; a groove 12 on the outer wall of the water inlet pipe; a groove 13 on the inner wall of the water inlet pipe;

in the embodiment of the utility model, the water return pipe 2 and the water inlet pipe 7 of the underground concentric double-pipe heat exchanger 1 are of concentric structures, the water return pipe 2 is arranged in the water inlet pipe 7, the circulating water flows between the water inlet pipe 7 and the water return pipe 2 to absorb the underground heat, and the circulating water after absorbing the heat flows out of the water return pipe 2;

in the embodiment of the utility model, a heat insulation structure is arranged on the outer surface of the return pipe 2 for reducing the heat loss of return water, and the heat insulation structure comprises a return pipe heat insulation sleeve, a heat insulation layer 5 and a cover plate 3 to form a closed space;

in the embodiment of the utility model, the return pipe 2 is composed of a standard long pipe, and the length of the return pipe heat-insulating sleeve 4 is shorter than that of the standard long pipe, so that the connection between the sections of the return pipe 2 is prevented from being influenced;

in the embodiment of the utility model, a hollow structure is arranged between the backwater heat-preserving sleeve 4 and the backwater pipe 2, the outer wall of the backwater pipe 2 is brushed with heat-insulating materials, and the hollow space between the backwater heat-preserving sleeve 4 and the backwater pipe 2 is filled with heat-insulating materials and is vacuumized;

in the embodiment of the utility model, the outer wall of the water inlet pipe 7 is provided with a plurality of fins 8, which can increase the heat exchange area of the outer wall of the water inlet pipe 7 and increase the heat exchange capacity;

in the embodiment of the utility model, the outer wall of the water inlet pipe 7 is provided with a groove 12 of the outer wall of the water inlet pipe, and the inner wall of the water inlet pipe is provided with a groove 13 of the inner wall of the water inlet pipe, so that the heat exchange area of the water inlet pipe can be increased, and the heat exchange capacity is increased;

in the embodiment of the utility model, the water return pipe 2 and the water inlet pipe 7 have a certain space at the bottom, which can contain a certain amount of impurities and prevent the pipeline from being blocked;

the structure size of all the underground concentric sleeve type heat exchangers in the utility model is not explained, and the detailed design needs to be designed according to the specific field condition of the project;

while the exemplary systems and methods of the present invention have been particularly shown and described with reference to the foregoing embodiments, it is merely illustrative of the best modes for carrying out the systems and methods. It will be appreciated by those skilled in the art that various changes in the embodiments of the systems and methods described herein may be made in practicing the systems and/or methods without departing from the spirit and scope of the invention as defined in the appended claims. It is intended that the following claims define the scope of the system and method and that the system and method within the scope of these claims and their equivalents be covered thereby. The above description of the present system and method should be understood to include all new and non-obvious combinations of elements described herein, and claims may be presented in this or a later application to any new and non-obvious combination of elements. Moreover, the foregoing embodiments are illustrative, and no single feature or element is essential to all possible combinations that may be claimed in this or a later application.

Claims (5)

1. An underground concentric double pipe heat exchanger, comprising: the device comprises an underground concentric sleeve type heat exchanger (1), a water return pipe (2), a cover plate (3), a water return pipe heat-insulating sleeve (4), a heat-insulating layer (5), a circulating water inlet channel (6), a water inlet pipe (7), fins (8), a water return channel (9), a water inlet pipe bottom plate (10), a geothermal well (11), a water inlet pipe outer wall groove (12) and a water inlet pipe inner wall groove (13);

a water inlet pipe (7) and a water return pipe (2) of the buried concentric sleeve type heat exchanger (1) are of a concentric structure, the water return pipe (2) is arranged in the water inlet pipe (7), and circulating water flows between the water inlet pipe (7) and the water return pipe (2).

2. A buried concentric double pipe heat exchanger according to claim 1, characterized in that a thermal insulation structure is provided on the outer surface of the return pipe (2) to reduce the heat loss of the return water, and the thermal insulation structure is a closed space composed of the return pipe thermal insulation jacket (4), the thermal insulation layer (5) and the cover plate (3).

3. The underground concentric double pipe heat exchanger according to claim 1, characterized in that a hollow structure is formed between the return pipe insulation sleeve (4) and the return pipe (2), the outer wall of the return pipe (2) is coated with heat insulation material, and the hollow space between the return pipe insulation sleeve (4) and the return pipe (2) is filled with heat insulation material and vacuumized.

4. A buried concentric tube heat exchanger according to claim 1, characterized in that the outer wall of the inlet tube (7) is provided with a plurality of fins (8).

5. A buried concentric tube heat exchanger according to claim 1, wherein the inlet tube (7) is provided with an inlet tube outer wall groove (12) in the outer wall and an inlet tube inner wall groove (13) in the inner wall.

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