Durable heat exchange tube with high heat exchange efficiency

Abstract

A durable heat exchange tube with high heat exchange efficiency comprises a tube body which comprises a tube wall, a tube wall inner side coating and a tube wall outer side coating. The coating on the inner side of the pipe wall is a metal-based graphene composite coating; the pipe wall outer side coating comprises a zirconium oxide coating and an aluminum nitride coating which are sequentially arranged, the zirconium oxide coating is arranged on the outer surface of the pipe wall, and the aluminum nitride coating is arranged on the outer surface of the zirconium oxide coating. The metal-based graphene composite coating has the advantages that in the metal-based graphene composite coating, strong interface interaction exists between graphene and a metal matrix, the mechanical property and the heat-conducting property of a metal-based composite material can be effectively improved, the metal-based graphene composite coating has higher strength and heat conductivity, and the wear-resisting property and the corrosion-resisting property of the material are also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange tubes, in particular to a heat exchange tube that is durable and has high heat exchange efficiency. Background Art

[0002] The heat exchanger is an energy conversion device, and its performance determines the efficiency, quality and production cost of the supporting production. The main structural types of heat exchangers currently used in projects include plate type, spiral tube type and straight tube type, among which the most widely used is the straight tube heat exchanger. The characteristics of this traditional structure of heat exchanger are simple structure, easy to make, durable, safe and reliable, and most importantly, the application conditions are not high, which is suitable for heat exchange occasions in almost all industries. At present, the surface of the heat exchange tube is in frequent contact with water during use, and the outer wall and the inner wall are always worn during use. The heat exchange tube is not easy to replace during use, and it requires a lot of manpower and material resources when it needs to be repaired. In view of the problems exposed during the use of the current heat exchange tube, it is necessary to improve and optimize the structure of the heat exchange tube. Utility Model Content

[0003] The purpose of the utility model is to provide a heat exchange tube which is durable and has high heat exchange efficiency in view of the above-mentioned deficiencies.

[0004] The utility model comprises

[0005] The pipe body comprises a pipe wall, a coating on the inner side of the pipe wall and a coating on the outer side of the pipe wall;

[0006] The coating on the inner side of the tube wall is a metal-based graphene composite coating;

[0007] The coating on the outer side of the tube wall comprises a zirconium oxide coating and an aluminum nitride coating which are arranged in sequence, and the zirconium oxide coating is arranged on the outer surface of the tube wall, and the aluminum nitride coating is arranged on the outer surface of the zirconium oxide coating.

[0008] Preferably, the zirconium oxide coating and the aluminum nitride coating are sprayed onto the outer surface of the tube wall by plasma arc gas to form an outer coating of the tube wall.

[0009] Preferably, the tube body is a seamless steel tube or a seamless aluminum tube.

[0010] Preferably, the metal-based graphene composite coating is a graphene / Cu coating or a graphene / Al coating, wherein the mass of the graphene powder accounts for 0.1% to 1.0% of the total weight of the metal powder and the graphene powder. The particle size of the metal powder is 30 to 55 um; the particle size of the graphene powder is 20 to 50 um.

[0011] Preferably, the outer wall of the tube wall is also evenly provided with a plurality of fins, the outer surfaces of the plurality of fins are provided with the outer coating of the tube wall, the zirconium oxide coating is provided on the outer surface of the fins, and the aluminum nitride coating is provided on the outer surface of the zirconium oxide coating.

[0012] Preferably, the tube wall and the plurality of fins are an integrally formed structure, and the fins are circular ring-shaped structures.

[0013] The utility model has the advantages that in the metal-based graphene composite coating, there is a strong interface interaction between the graphene and the metal matrix, which can effectively improve the mechanical properties and thermal conductivity of the metal-based composite material, have higher strength and thermal conductivity, and also improve the wear resistance and corrosion resistance of the material. Zirconium oxide has excellent thermal conductivity and has better high-temperature thermal conductivity than traditional thermal conductive materials. The thermal conductivity of aluminum nitride is very high, about 180-285 W / m·K, which is much higher than traditional heat dissipation materials such as aluminum and copper. This means that it can conduct and disperse heat more effectively, allowing heat to be quickly conducted from the heat source to the external environment. Aluminum nitride has high hardness and mechanical strength, and can maintain stable performance under high temperature and pressure environments. This makes it perform well in high-power and high-temperature applications and can withstand complex working conditions. The aluminum nitride coating also makes the pipe body more wear-resistant and durable during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 Schematic diagram of the structure of the tube body.

[0016] Figure 3 Schematic diagram of the structure of a tube body with fins.

[0017] Figure 4 Schematic diagram of the structure of the tube wall and multiple fins. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0020] In the description of the embodiments of the present utility model, it should be noted that if the terms "upper", "lower", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, if the terms "first", "second", etc. appear in the description of the present utility model, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] As shown in the accompanying drawings, the utility model includes

[0023] The pipe body 100 comprises a pipe wall 101, a coating on the inner side of the pipe wall and a coating on the outer side of the pipe wall;

[0024] The coating on the inner side of the tube wall is a metal-based graphene composite coating 102;

[0025] The coating on the outer side of the tube wall includes a zirconium oxide coating 103 and an aluminum nitride coating 104 which are arranged in sequence, and the zirconium oxide coating 103 is arranged on the outer surface of the tube wall, and the aluminum nitride coating 104 is arranged on the outer surface of the zirconium oxide coating 103 .

[0026] In another technical solution, the zirconium oxide coating 103 and the aluminum nitride coating 104 are sprayed onto the outer surface of the tube wall 101 by plasma arc gas to form a coating on the outer side of the tube wall.

[0027] In another technical solution, the tube body 100 is a seamless steel tube or a seamless aluminum tube. The steel tube or the aluminum tube has good thermal conductivity and high heat exchange efficiency.

[0028] In another technical solution, the metal-based graphene composite coating 102 is a graphene / Cu coating or a graphene / Al coating, wherein the mass of the graphene powder accounts for 0.1% to 1.0% of the total weight of the metal powder and the graphene powder. The particle size of the metal powder is 30 to 55 um; and the particle size of the graphene powder is 20 to 50 um.

[0029] In another technical solution, the outer wall of the tube wall 101 is evenly provided with a plurality of fins 110, the outer surfaces of the plurality of fins 110 are provided with the outer coating of the tube wall, the zirconium oxide coating 103 is provided on the outer surface of the fin 110, and the aluminum nitride coating 104 is provided on the outer surface of the zirconium oxide coating 103. The fins can further improve the heat exchange efficiency of the heat exchange tube.

[0030] In another technical solution, the tube wall 101 and the plurality of fins 110 are an integrally formed structure, and the fins 110 are circular ring-shaped sheet structures.

[0031] Working principle: In the metal-based graphene composite coating, there is a strong interface interaction between graphene and the metal matrix, which can effectively improve the mechanical properties and thermal conductivity of the metal-based composite material, have higher strength and thermal conductivity, and also improve the wear resistance and corrosion resistance of the material. Zirconia has excellent thermal conductivity and has better high-temperature thermal conductivity than traditional thermal conductive materials. The thermal conductivity of aluminum nitride is very high, about 180-285 W / m·K, which is much higher than traditional heat dissipation materials such as aluminum and copper. This means that it can conduct and disperse heat more effectively, allowing heat to be quickly conducted from the heat source to the external environment. Aluminum nitride has high hardness and mechanical strength, and can maintain stable performance under high temperature and pressure environments. This makes it perform well in high-power and high-temperature applications and can withstand complex working conditions. The aluminum nitride coating also makes the tube more wear-resistant and durable during use.

[0032] The above implementation cases are only for illustrating the technical solutions and features of the utility model, and their purpose is to enable people familiar with the technology to implement them better. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model are within the protection scope of the utility model, and those not described in detail are prior art.

Claims

1. A heat exchange tube with high heat exchange efficiency and durability, characterized in that: include A pipe body (100) comprising a pipe wall (101), a coating on the inner side of the pipe wall and a coating on the outer side of the pipe wall; The coating on the inner side of the tube wall is a metal-based graphene composite coating (102); The coating on the outer side of the tube wall comprises a zirconium oxide coating (103) and an aluminum nitride coating (104) which are arranged in sequence, and the zirconium oxide coating (103) is arranged on the outer surface of the tube wall, and the aluminum nitride coating (104) is arranged on the outer surface of the zirconium oxide coating (103); The metal-based graphene composite coating (102) is a graphene / Cu coating or a graphene / Al coating.

2. A heat exchange tube having high heat exchange efficiency and durability according to claim 1, characterized in that: The zirconium oxide coating (103) and the aluminum nitride coating (104) are sprayed onto the outer surface of the tube wall (101) by plasma arc gas to form a coating on the outer side of the tube wall.

3. A heat exchange tube having high heat exchange efficiency and durability according to claim 1, characterized in that: The tube body (100) is a seamless steel tube or a seamless aluminum tube.

4. A heat exchange tube having high heat exchange efficiency and durability according to claim 1, characterized in that: The outer wall of the tube wall (101) is also evenly provided with a plurality of fins (110), the outer surfaces of the plurality of fins (110) are provided with the tube wall outer coating, the zirconium oxide coating (103) is provided on the outer surfaces of the fins (110), and the aluminum nitride coating (104) is provided on the outer surface of the zirconium oxide coating (103).

5. The heat exchange tube having high heat exchange efficiency and durability according to claim 1, characterized in that: The tube wall (101) and the plurality of fins (110) are an integrally formed structure, and the fins (110) are circular ring-shaped sheet structures.

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