Modified pipe for middle-deep layer terrestrial heat

Abstract

The utility model relates to the technical field of terrestrial heat pipes, in particular to a modified pipe for middle-deep layer terrestrial heat, which comprises an outer pipeline, an inner pipeline, supporting ribs and a heat exchange structure. The outer pipeline and the inner pipeline are fixedly connected through a plurality of supporting ribs, a gap between the outer pipeline and the inner pipeline is divided into a plurality of heat exchange areas by the supporting ribs, a heat exchange structure is mounted in each heat exchange area, and the heat exchange structures penetrate through the inner pipeline and are fixedly connected with the inner pipeline. The heat exchange medium is injected into the heat exchange area, heat energy absorbed by the medium is exchanged to fluid in the inner pipe through the heat exchange structure, the step of discharging the medium into the inner pipe is omitted, heat energy loss is reduced, the heat exchange efficiency is improved, meanwhile, the medium does not flow in the heat exchange area, and the heat exchange efficiency is improved. Impact and loss to the interior of the pipe are reduced, and the service life of the pipe is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of geothermal pipes, and more specifically to a modified pipe for medium-deep geothermal. Background Art

[0002] Underground thermal energy is a clean energy and an inexhaustible green energy. The use of underground energy is an inevitable trend of social development. It does not occupy ground resources, has superior economic performance, low operating costs and high energy utilization efficiency.

[0003] The utilization of shallow surface thermal energy has been widely used. The daily heat fluctuation range of the ground is 1-2 meters above the ground, and the annual heat fluctuation range of the ground is above 30 meters underground. Below 30 meters above the ground, the temperature increases with depth, 2-4℃ / 100m. At present, shallow geothermal utilization is mainly concentrated between 120-150m, and energy utilization can be achieved by using polyethylene water supply pipes. The utilization of medium-shallow geothermal resources of 200-500m and the utilization of medium-deep geothermal resources of 500-3000m cannot be achieved using the existing pipeline system.

[0004] At present, a utility model patent with a Chinese patent publication number of CN 217585466 U discloses an integrated large-flux high-heat exchange pipe, including an outer pipe, connecting ribs, an inner pipe, a flow channel and a flow channel docking positioning line, wherein the outer pipe and the inner pipe are connected into one by connecting ribs, including an integrated pipe of inner and outer pipes with a structure of several equally divided flow channels, and the outer pipe and the inner pipe are connected together by connecting ribs; the outer pipe, the inner pipe and the connecting ribs are made of the same thermoplastic material and can be directly hot-melt-butted; the outer pipe transfers the medium-deep geothermal energy to the medium in the hollow flow channel, and the heated medium is transported to the heat pump unit along the inner pipe to complete the energy heat exchange, which has the advantages of simple structure, convenient construction, high heat exchange efficiency and long service life.

[0005] However, after the medium is heated, the above-mentioned pipeline needs to discharge the medium from the hollow flow channel and then discharge it into the inner tube. This process will cause a large amount of heat loss. At the same time, the long-term flow of the medium will cause wear and tear on the inside of the hollow flow channel, which is not conducive to the long-term use of the pipeline. Utility Model Content

[0006] In order to solve the above problems, the utility model provides a modified pipe material for deep-layer geothermal with high strength and high heat exchange efficiency.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions, which mainly include:

[0008] The modified pipe for medium-deep geothermal includes an outer pipe, an inner pipe, support ribs and a heat exchange structure; the outer pipe and the inner pipe are fixedly connected by a plurality of support ribs, the support ribs divide the gap between the outer pipe and the inner pipe into a plurality of heat exchange areas, each heat exchange area is equipped with a heat exchange structure, and the heat exchange structures are all passed through the inner pipe and fixedly connected to the inner pipe.

[0009] Preferably, a plurality of positioning strips for installation and positioning are provided at both ends of the outer pipe.

[0010] Preferably, the positioning strip and the outer pipe are an integral structure.

[0011] Preferably, the outer pipe, the inner pipe and the supporting ribs are an integrated structure.

[0012] Preferably, the heat exchange structure includes a heat exchange disk, a connecting column, a heat pipe and a connecting pipe; a plurality of connecting columns are provided on the inner pipe, the lower ends of the connecting columns located on the same straight line are fixedly connected to the heat pipe, the heat pipe is located on the inner side of the inner pipe and fixedly connected to the inner pipe, the upper end of each connecting column is fixedly connected to a heat exchange disk, and the heat exchange disks located on the same straight line are fixedly connected via a connecting pipe.

[0013] It can be seen from the above technical solution that compared with the prior art, the utility model eliminates the step of discharging the medium into the inner pipe by injecting the heat exchange medium into the heat exchange area and exchanging the heat energy absorbed by the medium to the fluid in the inner tube through the heat exchange structure, thereby reducing the loss of heat energy and improving the heat exchange efficiency. At the same time, the medium does not flow in the heat exchange area, reducing the impact and loss on its interior, and further extending the service life of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0015] Figure 1 It is a structural sectional view of the utility model.

[0016] Figure 2 It is a three-dimensional structural schematic diagram of the utility model.

[0017] Explanation of the reference numerals: 1 - outer pipe, 101 - positioning bar, 2 - inner pipe, 3 - supporting rib, 4 - heat exchange plate, 401 - connecting column, 402 - heat pipe, 403 - connecting pipe. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Example

[0020] Modified pipes for medium and deep geothermal, such as Figure 1 and Figure 2 As shown, it includes an outer pipe 1, an inner pipe 2, support ribs 3 and a heat exchange structure; the outer pipe 1 and the inner pipe 2 are fixedly connected by a plurality of support ribs 3, and the support ribs 3 divide the gap between the outer pipe 1 and the inner pipe 2 into a plurality of heat exchange areas, and a heat exchange structure is installed in each heat exchange area, and the heat exchange structures are all arranged in the inner pipe 2 and fixedly connected to the inner pipe 2.

[0021] In order to further optimize the above solution, a plurality of positioning strips 101 for installation and positioning are provided at both ends of the outer pipe 1 .

[0022] In order to further optimize the above solution, the positioning strip 101 and the outer pipe 1 are an integral structure.

[0023] In order to further optimize the above scheme, the outer pipe 1, the inner pipe 2 and the support rib 3 are an integrated structure; they are made of modified polyvinyl chloride material, namely PVC-M, PVC-A or PVC-HI; on the premise that the material itself has high toughness and high strength, the overall strength of the pipe is further increased by the structure of the support rib 3, so that the pipe can be used for medium and deep pressures, thereby extending the service life of the pipe.

[0024] In order to further optimize the above scheme, the heat exchange structure includes a heat exchange disk 4, a connecting column 401, a heat pipe 402 and a connecting pipe 403; a plurality of connecting columns 401 are provided on the inner pipe 2, and the lower ends of the connecting columns 401 located on the same straight line are fixedly connected to the heat pipe 402, and the heat pipe 402 is located on the inner side of the inner pipe 2 and is fixedly connected to the inner pipe 2, and the upper end of each connecting column 401 is fixedly connected to a heat exchange disk 4, and the heat exchange disks 4 located on the same straight line are fixedly connected by connecting pipes 403; by The medium is injected into the heat exchange area, and then the heat exchange disk 4 in the heat exchange area absorbs the heat energy of the medium, and then transfers it to the heat pipe 402 through the connecting column 401, and then the heat pipe 402 exchanges the heat energy to the fluid in the inner pipe (generally water), so that the heat exchange structure exchanges the heat energy absorbed by the medium to the fluid in the inner pipe, thereby eliminating the step of discharging the medium into the inner pipe 2, reducing the loss of heat energy, and thus improving the heat exchange efficiency. At the same time, the medium does not flow in the heat exchange area, reducing the impact and loss on its interior, and further extending the service life of the pipe.

[0025] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0026] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Modified pipes for medium and deep geothermal, characterized in that: It includes an outer pipe, an inner pipe, support ribs and a heat exchange structure; the outer pipe and the inner pipe are fixedly connected by a plurality of support ribs, the support ribs divide the gap between the outer pipe and the inner pipe into a plurality of heat exchange areas, each heat exchange area is equipped with a heat exchange structure, and the heat exchange structures are all passed through the inner pipe and fixedly connected to the inner pipe.

2. The modified pipe for medium-deep geothermal heat according to claim 1, characterized in that: A plurality of positioning strips for installation and positioning are arranged at both ends of the outer pipe.

3. The modified pipe for medium-deep geothermal heat according to claim 2, characterized in that: The positioning strip and the outer pipe are an integral structure.

4. The modified pipe for medium-deep geothermal heat according to any one of claims 1 or 3, characterized in that: The outer pipe, the inner pipe and the supporting ribs are an integrated structure.

5. The modified pipe for medium-deep geothermal heat according to claim 1, characterized in that: The heat exchange structure includes a heat exchange disk, a connecting column, a heat pipe and a connecting pipe; a plurality of connecting columns are provided on the inner pipe, the lower ends of the connecting columns located on the same straight line are fixedly connected to the heat pipe, the heat pipe is located on the inner side of the inner pipe and is fixedly connected to the inner pipe, the upper end of each connecting column is fixedly connected to a heat exchange disk, and the heat exchange disks located on the same straight line are fixedly connected via a connecting pipe.

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