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CN-224202251-U - High heat conduction buried pipe with multilayer composite structure

CN224202251UCN 224202251 UCN224202251 UCN 224202251UCN-224202251-U

Abstract

The utility model provides a high-heat-conductivity buried pipe with a multilayer composite structure, which belongs to the technical field of geology and geotechnical engineering and comprises an outer pipe, wherein a filling block is fixedly arranged in an inner cavity of the outer pipe, an inner pipe is fixedly arranged in the inner cavity of the filling block, and the inner pipe comprises a metal layer and a vacuum heat insulation layer fixedly arranged on the outer side of the metal layer. The utility model realizes the cooperative optimization of mechanical support, heat conduction and medium transportation through the multi-layer composite structure design of the outer pipe, the filling blocks and the inner pipe, the protective coating of the outer pipe effectively resists external corrosion, the filling blocks are combined with the supporting plates and the honeycomb structure to form a buffer system for dispersing soil pressure and absorbing impact energy, the inner pipe adopts the combination of the high heat conduction metal layer and the vacuum heat insulation layer and is matched with the micron-sized fins to obviously improve the heat exchange efficiency, the truss layout of the three annular brackets ensures the structural stability, and the integral structure obviously improves the compression resistance, the durability and the environmental adaptability of the buried pipe while ensuring the efficient heat transfer.

Inventors

  • LI NA

Assignees

  • 北京新航城市政工程有限公司

Dates

Publication Date
20260505
Application Date
20250603

Claims (7)

  1. 1. The high-heat-conductivity buried pipe with the multilayer composite structure is characterized by comprising an outer pipe (1), wherein a filling block (2) is fixedly arranged in an inner cavity of the outer pipe (1), and an inner pipe (3) is fixedly arranged in an inner cavity of the filling block (2).
  2. 2. The high heat conduction buried pipe with the multilayer composite structure according to claim 1, wherein the inner pipe (3) comprises a metal layer (31), a vacuum heat insulation layer (32) fixedly arranged on the outer side of the metal layer (31), and micron-sized fins (33) arranged on the inner wall of the metal layer (31).
  3. 3. The high-heat-conductivity buried pipe with the multilayer composite structure according to claim 2, wherein the outer side of the inner pipe (3) is fixedly provided with three brackets (4), the three brackets (4) are uniformly distributed on the outer side of the inner pipe (3) in a ring shape, and one side of the bracket (4) is fixedly connected with the inner wall of the outer pipe (1).
  4. 4. A high thermal conductivity buried pipe with a multilayer composite structure according to claim 3, characterized in that the outer side of the outer pipe (1) is coated with a protective coating (5), and the protective coating (5) is made of sintered epoxy powder coating.
  5. 5. The high heat conduction buried pipe with the multilayer composite structure according to claim 4, wherein the outer side of the filling block (2) is fixedly provided with a supporting plate (6) in a ring shape, and an inner cavity of the filling block (2) is fixedly provided with a buffering honeycomb column (7).
  6. 6. The high heat conduction buried pipe with the multilayer composite structure according to claim 5, wherein a conveying channel (8) is formed in the inner cavity of the inner pipe (3) and used for conveying a medium.
  7. 7. The high-heat-conductivity buried pipe with the multilayer composite structure according to claim 6, wherein the inner wall of the outer pipe (1) is provided with a clamping groove (9), the outer side of the clamping groove (9) is fixedly provided with a limiting strip (10), and the supporting plate (6) is movably clamped in the inner cavity of the clamping groove (9).

Description

High heat conduction buried pipe with multilayer composite structure Technical Field The utility model belongs to the technical field of geology and geotechnical engineering, and particularly relates to a high-heat-conductivity buried pipe with a multilayer composite structure. Background The high heat conduction buried pipe is a special heat exchange pipeline applied to the fields of ground source heat pump systems, geothermal energy utilization, underground engineering heat dissipation and the like, is generally made of high heat conduction materials, and is used for carrying out high-efficiency heat exchange by being buried underground and surrounding soil or rock stratum, and the core function of the high heat conduction buried pipe is to strengthen heat transfer between the underground and the ground systems, improve the energy efficiency ratio of the ground source heat pump and solve the heat dissipation requirement of underground facilities. At present, the single-layer structure of the high-heat-conductivity buried pipe is difficult to simultaneously meet the comprehensive requirements of high strength, corrosion resistance and high-efficiency heat conduction, so that the mechanical stability is insufficient, the long-term corrosion resistance is reduced, the structural failure is caused by heat stress concentration, and the heat transfer efficiency is influenced by the high thermal resistance of a pipe-soil interface. Disclosure of utility model The utility model aims to provide a high-heat-conductivity buried pipe with a multilayer composite structure, and aims to solve the problems in the background technology. In order to achieve the above purpose, the present utility model provides the following technical solutions: The high-heat-conductivity buried pipe with the multilayer composite structure comprises an outer pipe, wherein a filling block is fixedly arranged in an inner cavity of the outer pipe, and an inner pipe is fixedly arranged in an inner cavity of the filling block. As a preferable scheme of the utility model, the inner tube comprises a metal layer, a vacuum heat insulation layer fixedly arranged on the outer side of the metal layer and micron-sized fins arranged on the inner wall of the metal layer. As a preferable scheme of the utility model, the outer side of the inner pipe is fixedly provided with three brackets, the brackets are uniformly distributed on the outer side of the inner pipe in a ring shape, and one side of the bracket is fixedly connected with the inner wall of the outer pipe. In a preferred scheme of the utility model, the outer side of the outer tube is coated with a protective coating, and the protective coating is made of a sintered epoxy powder coating. As a preferable scheme of the utility model, the outer side of the filling block is fixedly provided with a supporting plate in a ring shape, and the inner cavity of the filling block is fixedly provided with a buffering honeycomb column. As a preferable scheme of the utility model, the inner cavity of the inner tube is provided with a conveying channel for conveying the medium. As a preferable scheme of the utility model, a clamping groove is formed in the inner wall of the outer tube, a limiting strip is fixedly arranged on the outer side of the clamping groove, and the supporting plate is movably clamped in the inner cavity of the clamping groove. Compared with the prior art, the heat exchange device has the beneficial effects that through the multi-layer composite structure design of the outer tube, the filling blocks and the inner tube, the cooperative optimization of mechanical support, heat conduction and medium conveying is realized, the protective coating of the outer tube effectively resists external corrosion, the filling blocks are combined with the supporting plates and the honeycomb structure to form a buffer system for dispersing soil pressure and absorbing impact energy, the inner tube is combined with the high-heat-conductivity metal layer and the vacuum heat insulation layer and is matched with the micron-sized fins to obviously improve the heat exchange efficiency, the truss type layout of the three annular brackets ensures the structural stability, and the integral structure obviously improves the compression resistance, the durability and the environmental adaptability of the buried tube while guaranteeing the efficient heat transfer. Drawings In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein: FIG. 1 is a schematic diagram of the overall structure of the present utility model; FIG. 2 show