CN115420126A - Corrosion-resistant and insulating heat pipe structure and preparation method thereof - Google Patents

Corrosion-resistant and insulating heat pipe structure and preparation method thereof Download PDF

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Publication number
CN115420126A
CN115420126A CN202211220232.9A CN202211220232A CN115420126A CN 115420126 A CN115420126 A CN 115420126A CN 202211220232 A CN202211220232 A CN 202211220232A CN 115420126 A CN115420126 A CN 115420126A
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CN
China
Prior art keywords
pipe
heat pipe
liquid
corrosion resistance
pipe body
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Pending
Application number
CN202211220232.9A
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Chinese (zh)
Inventor
袁雪鹏
汤勇
张仕伟
颜才满
孙亚隆
伍春霞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
South China University of Technology SCUT
Zhuhai Institute of Modern Industrial Innovation of South China University of Technology
Original Assignee
South China University of Technology SCUT
Zhuhai Institute of Modern Industrial Innovation of South China University of Technology
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Application filed by South China University of Technology SCUT, Zhuhai Institute of Modern Industrial Innovation of South China University of Technology filed Critical South China University of Technology SCUT
Priority to CN202211220232.9A priority Critical patent/CN115420126A/en
Publication of CN115420126A publication Critical patent/CN115420126A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D15/0283—Means for filling or sealing heat pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D15/04—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure
    • F28D15/046—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure characterised by the material or the construction of the capillary structure

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Insulation (AREA)

Abstract

The invention relates to a corrosion-resistant and insulating heat pipe structure, which comprises a pipe body and an end enclosure, wherein the pipe body and the end enclosure are both made of metal ceramic materials; a liquid absorption core is arranged in the steam cavity, and the outer side wall of the liquid absorption core is abutted against the inner side wall of the pipe body; the steam cavity is vacuumized and filled with liquid working medium. The pipe body and the end socket of the heat pipe structure are made of metal ceramic materials, have the characteristics of corrosion resistance and insulation, and can meet the industrial requirements of corrosion resistance and insulation; the body steam intracavity is equipped with the imbibition core, and body opening sealing connection guarantees the sealing performance in evaporation chamber in the head for the heat pipe structure can realize high-efficient heat dissipation based on the phase transition principle, can not take place the phenomenon of intraductal oxidation, decarbonization, can keep the good heat dispersion of heat pipe. The invention also relates to a preparation method of the corrosion-resistant and insulating heat pipe structure.

Description

Corrosion-resistant and insulating heat pipe structure and preparation method thereof
Technical Field
The invention belongs to the technical field of device heat dissipation, and particularly relates to a corrosion-resistant and insulating heat pipe structure and a preparation method thereof.
Background
The industries such as electric power, metallurgy, petrochemical industry, chemical fiber and the like need to radiate heat to the outside to ensure the normal operation of equipment because the working power is often larger, however, the industries have special requirements on radiating elements, for example, the electric power equipment often needs insulation and high voltage resistance of components, the petrochemical industry needs the corrosion resistance of the components, the heat conducting capacity of common air cooling and liquid cooling at present cannot meet the rapidly-increased radiating requirement, and the components need to be additionally processed to meet the special requirements of the industries.
The heat pipe is an artificial component with excellent heat transfer performance, and the commonly used heat pipe comprises three parts: the main body is a closed metal tube, and a working medium and a capillary structure core are arranged in an inner cavity. From the heat transfer condition, the heat pipe can be divided into an evaporation section, a heat insulation section and a condensation section along the axial direction. When the heat-insulating evaporator works, the working medium in the evaporation section is heated by the hot fluid outside the pipe, latent heat is absorbed for evaporation, steam flows to the condensation section through the heat-insulating section, and the latent heat is released by the working medium steam and is condensed into liquid. Latent heat released by the liquefaction of the vapor is transferred to the cold fluid outside the heat pipe through the pipe wall. The liquid working medium accumulated in the capillary structure core of the condensation section returns to the evaporation section by virtue of the capillary force of the capillary structure core and then absorbs heat for evaporation, so that the heat transfer process is realized.
The heat pipe in the prior art has the following technical problems:
the metal heat pipe cannot meet the requirements of special industries on corrosion resistance and insulation of the heat pipe; although the single-sided enamel heat pipe has certain corrosion resistance, the heat pipe is easy to oxidize and decarbonize in the pipe, so that the performance of the heat pipe is seriously reduced.
Disclosure of Invention
Aiming at the technical problems in the prior art, one of the purposes of the invention is as follows: the heat pipe structure with corrosion resistance and insulation can meet the industrial requirements of corrosion resistance and insulation, the phenomena of oxidation and decarburization in the pipe can not occur, and good heat dissipation performance of the heat pipe can be maintained.
Aiming at the technical problems in the prior art, the second purpose of the invention is as follows: a method for manufacturing a heat pipe structure having corrosion resistance and insulation is provided.
The purpose of the invention is realized by the following technical scheme:
a heat pipe structure with corrosion resistance and insulation comprises a pipe body and a sealing head, wherein the pipe body and the sealing head are both made of metal ceramic materials, one end of the pipe body is provided with an opening, the opening of the pipe body is connected with the sealing head in a sealing manner, and a steam cavity is arranged between the pipe body and the sealing head; a liquid absorption core is arranged in the steam cavity, and the outer side wall of the liquid absorption core is abutted against the inner side wall of the pipe body; the steam cavity is vacuumized and filled with liquid working medium.
Furthermore, the liquid absorption core is formed by sintering glass powder and/or metal ceramic powder.
Further, the liquid working medium is deionized water, methanol or ethanol.
Further, the head is equipped with irritates the liquid pipe, irritates the liquid pipe and connects in body steam chamber.
Further, a sealing cap made of a metal ceramic material is arranged outside the sealing head, the sealing cap is connected with the pipe body in a sealing mode, high-temperature sealant is arranged in the sealing cap, and the sealing head and the liquid filling pipe are wrapped by the sealant.
Further, the tube body and the end socket, the sealing cap and the tube body are all sealed by laser glass brazing.
A method for preparing a heat pipe structure with corrosion resistance and insulation comprises the following steps,
step 1, sintering a heat absorption core in a pipe body with an opening at one end, and enabling the outer side wall of the liquid absorption core to abut against the inner side wall of the pipe body;
step 2, connecting the opening of the pipe body and the end enclosure in a sealing manner by using laser glass brazing to form a steam cavity between the pipe body and the end enclosure, wherein the pipe body and the end enclosure are both prepared from metal ceramic materials;
and 3, injecting a liquid working medium into the steam cavity and vacuumizing the steam cavity.
Further, the implementation manner of the step 1 is that the tube body is vertically placed on a heat pipe powder filling machine, a core rod is inserted, at least one of glass powder, alumina or aluminum nitride is filled between the core rod and the tube body and is compacted, then the tube body is placed in a high-temperature furnace, and sintering is carried out at a temperature lower than the melting point of the powder, so that the powder sintering liquid absorption core is obtained.
And 3, injecting 50-150% of liquid working medium absorbed by the liquid absorption core into the pipe body through the liquid filling pipe on the end socket, freezing for 5min at the temperature lower than the freezing temperature of the working medium, degassing for the first time and degassing for the second time to change the steam cavity into vacuum or negative pressure, and then sealing the liquid filling pipe.
And step 3, filling high-temperature sealant in the sealing cap cavity, brazing and sealing the sealing cap and the pipe body by adopting laser glass to further seal the pipe body, and enabling the sealant in the sealing cap cavity to wrap the sealing head and the liquid filling pipe.
Compared with the prior art, the invention has the following beneficial effects:
the pipe body and the end socket of the heat pipe structure are made of metal ceramic materials, have the characteristics of corrosion resistance and insulation, and can meet the industrial requirements of corrosion resistance and insulation; the liquid absorption core is arranged in the pipe body steam cavity, the opening of the pipe body is connected to the end socket in a sealing mode, the sealing performance of the evaporation cavity is guaranteed, the heat pipe structure can realize high-efficiency heat dissipation based on the phase change principle, the phenomena of oxidation and decarburization in the pipe body can not occur, good heat dissipation performance of the heat pipe can be kept, and the heat pipe structure becomes an electric power industry, a metallurgy industry, a petrochemical industry and the like and has potential components.
Drawings
Fig. 1 is a schematic view of a heat pipe structure having corrosion resistance and insulation according to the present embodiment.
Fig. 2 is a schematic cross-sectional view of the tube according to the embodiment.
Fig. 3 is a schematic structural diagram of the sealing cap of the present embodiment.
In the figure:
1. a pipe body; 2. a liquid filling pipe; 3. a glass braze joint; 4. sealing the cap; 5. a wick; 6. a steam chamber; 7. a capping cavity; 8. and (5) sealing the head.
Detailed Description
The present invention is described in further detail below.
As shown in fig. 1-3, a corrosion-resistant and insulating heat pipe structure comprises a pipe body 1 and a sealing head 8, a steam cavity 6 is formed between the pipe body 1 and the sealing head 8 in a sealing manner, a powder wick 5 is sintered on the inner surface of the pipe body 1, and the steam cavity 6 is in vacuum or negative pressure during operation.
The end socket 8 is provided with a liquid filling pipe 2, and 50-150% of saturated liquid-absorbing working medium of the liquid absorption core 5 is injected through the liquid filling pipe 2. And (3) placing the heat pipe in an atmosphere with the freezing temperature far lower than that of the liquid working medium for 5Min, and then vacuumizing.
And the end socket 8 and the pipe body 1 are sealed by laser glass brazing to obtain a glass brazing joint 3.
The outside is equipped with sealing cap 4 on the head 8, and sealing cap 4 is U type structure, and one end is equipped with sealing cap cavity 7, is full of high temperature sealed glue in sealing cap cavity 7 to further seal sealing cap 4 and body 1 through laser glass welding, sealed glue in sealing cap cavity 7 wraps up in liquid filling pipe 2.
Specifically, the wick 5 is formed by sintering one or more of glass powder or cermet powder such as alumina and aluminum nitride on the inner surface of the tube 1. The pipe body 1, the end socket 8 and the sealing cap 4 are made of metal ceramic materials such as corundum and aluminum nitride.
In this embodiment, the cross-sections of the tube 1 and the wick 5 are circular.
The heat pipe structure is based on the phase change heat transfer principle, can realize quick heat dissipation of the heat pipe, and simultaneously has the heat dissipation capacity of a metal heat pipe, corrosion resistance and insulation properties due to the fact that the heat pipe is made of corundum, glass powder and other insulation materials, is wider in application range, and is a very potential component which effectively meets the heat dissipation requirements of industries such as electric power, metallurgy, petrifaction and the like.
A heat pipe structure with corrosion resistance and insulation and a preparation method thereof comprise the following steps:
(1) Cleaning the inner surface and the outer surface of the pipe body 1: and (3) putting the pipe body 1 into an oil removing agent for ultrasonic heating and cleaning for more than 10Min, putting into ultrapure water for ultrasonic cleaning for more than 5Min, finally drying the surface water stain, putting into an oven for baking for 30Min, and taking out for later use.
(2) Preparation of the liquid absorption core 5: vertically placing the pipe body 1 on a heat pipe powder filling machine, inserting a core rod, further filling one or more mixed powder of glass powder, aluminum oxide or aluminum nitride and the like, compacting, finally placing the mixture in a high-temperature furnace, and sintering at the temperature lower than the melting point of the powder to obtain a powder sintering liquid absorption core 5.
(3) Sealing the pipe body 1: and sealing the pipe body 1 and the end enclosure 8 by laser glass brazing.
(4) Liquid working medium perfusion and degassing: liquid working media which is about 50 to 150 percent of saturated liquid absorption of the liquid absorption core 5 is injected into the steam cavity 6 through the liquid filling pipe 2, primary degassing and secondary degassing are carried out after the liquid working media are frozen for 5min at the temperature lower than the freezing temperature of the working media, so that the steam cavity 6 becomes vacuum or negative pressure, and the liquid filling pipe 2 is sealed.
(5) And sealing by the sealing cap 4: and after the sealing cap cavity 7 is filled with high-temperature sealant, the sealing cap cavity is butted with the pipe body 1, so that the sealant is wrapped on the liquid filling pipe 2 and the sealing head 8, and the pipe body 1 and the sealing cap 4 are further sealed by adopting laser glass.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such modifications are intended to be included in the scope of the present invention.

Claims (10)

1. A heat pipe structure with corrosion resistance and insulation is characterized in that: comprises a pipe body and a seal head, wherein the pipe body and the seal head are both made of metal ceramic materials, one end of the pipe body is provided with an opening, the opening of the tube body is hermetically connected with the end enclosure, and a steam cavity is arranged between the tube body and the end enclosure; a liquid absorption core is arranged in the steam cavity, and the outer side wall of the liquid absorption core is abutted against the inner side wall of the pipe body; the steam cavity is vacuumized and filled with liquid working medium.
2. A heat pipe structure having corrosion resistance and insulation in accordance with claim 1, wherein: the liquid absorption core is formed by sintering glass powder and/or metal ceramic powder.
3. A heat pipe structure having corrosion resistance and insulation according to claim 1, wherein: the liquid working medium is deionized water, methanol or ethanol.
4. A heat pipe structure having corrosion resistance and insulation according to claim 1, wherein: the head is equipped with irritates the liquid pipe, irritates the liquid pipe and connects in body steam chamber.
5. A heat pipe structure having corrosion resistance and insulation according to claim 1, wherein: the sealing cap is made of metal ceramic materials and is in sealing connection with the pipe body, high-temperature sealant is arranged in the sealing cap, and the sealing cap and the liquid filling pipe are wrapped by the sealant.
6. A heat pipe structure having corrosion resistance and insulation according to claim 1, wherein: the tube body and the end socket, the sealing cap and the tube body are all sealed by laser glass brazing.
7. A preparation method of a corrosion-resistant and insulating heat pipe structure is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
step 1, sintering a heat absorption core in a pipe body with an opening at one end, and enabling the outer side wall of the liquid absorption core to abut against the inner side wall of the pipe body;
step 2, connecting the opening of the pipe body and the end enclosure in a sealing manner by using laser glass brazing to form a steam cavity between the pipe body and the end enclosure, wherein the pipe body and the end enclosure are both prepared from metal ceramic materials;
and 3, injecting a liquid working medium into the steam cavity and vacuumizing the steam cavity.
8. A method of making a heat pipe structure having corrosion resistance and insulation as claimed in claim 7, wherein: the implementation mode of the step 1 is that the tube body is vertically placed on a heat pipe powder filling machine, a core rod is inserted, at least one powder body of glass powder, aluminum oxide or aluminum nitride is filled between the core rod and the tube body and is compacted, then the tube body is placed in a high-temperature furnace, and sintering is carried out at the temperature lower than the melting point of the powder body, so that the powder sintering liquid absorption core is obtained.
9. A method of making a heat pipe structure having corrosion resistance and insulation as claimed in claim 7, wherein: and 3, injecting 50-150% of liquid working medium absorbed by the liquid absorption core into the pipe body through the liquid filling pipe on the end socket, freezing for 5min at the temperature lower than the freezing temperature of the working medium, degassing for the first time and degassing for the second time to change the steam cavity into vacuum or negative pressure, and then sealing the liquid filling pipe.
10. A method of making a heat pipe structure having corrosion resistance and insulation as claimed in claim 7, wherein: and step 3, filling high-temperature sealant in the sealing cap cavity, brazing and sealing the sealing cap and the pipe body by adopting laser glass to further seal the pipe body, and enabling the sealant in the sealing cap cavity to wrap the sealing head and the liquid filling pipe.
CN202211220232.9A 2022-10-08 2022-10-08 Corrosion-resistant and insulating heat pipe structure and preparation method thereof Pending CN115420126A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211220232.9A CN115420126A (en) 2022-10-08 2022-10-08 Corrosion-resistant and insulating heat pipe structure and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211220232.9A CN115420126A (en) 2022-10-08 2022-10-08 Corrosion-resistant and insulating heat pipe structure and preparation method thereof

Publications (1)

Publication Number Publication Date
CN115420126A true CN115420126A (en) 2022-12-02

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ID=84205965

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211220232.9A Pending CN115420126A (en) 2022-10-08 2022-10-08 Corrosion-resistant and insulating heat pipe structure and preparation method thereof

Country Status (1)

Country Link
CN (1) CN115420126A (en)

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