Efficient heat dissipation insulator with built-in heat pipe
By insulators with built-in heat pipes and heat dissipation media, the heat transfer path is optimized, solving the problem of insufficient heat dissipation in traditional insulators, achieving efficient heat dissipation and improved stability, and extending the insulator's lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANTOU UNIV
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-19
AI Technical Summary
Traditional insulators suffer from insufficient heat dissipation under high load or high temperature conditions, resulting in excessive internal temperature rise, which affects operational stability and lifespan. Existing heat pipe layouts result in high thermal resistance and complex structures, making it difficult to achieve efficient heat dissipation.
The high-efficiency heat dissipation insulator structure with built-in heat pipes optimizes the heat transfer path by setting heat pipes and heat dissipation medium inside the insulator. It achieves high-efficiency heat transfer by using phase change working fluid and liquid wick structure. The heat pipes and hardware are fixed by threaded connection to ensure a compact design.
It significantly improves the heat dissipation performance of insulators, avoids internal heat accumulation, extends service life, and enhances operational stability and reliability.
Smart Images
Figure CN224263865U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power equipment, and in particular to a high-efficiency heat dissipation insulator with a built-in heat pipe. Background Technology
[0002] With the rapid development of high-voltage power transmission technology, insulators, as core components ensuring electrical insulation and mechanical support in transmission lines, are directly related to the safe operation of the power grid. Under high-voltage and high-current conditions, insulators are subject to long-term effects from corona discharge, dielectric loss, and ambient temperature rise, which can easily lead to localized heat accumulation in the top hardware area. If this heat cannot be dissipated in time, it will cause accelerated aging of the insulation material, decreased mechanical strength, and even serious accidents such as insulation breakdown.
[0003] Currently, traditional insulators primarily rely on natural convection or passive heat dissipation structures to dissipate heat. Some improvements enhance heat dissipation by adding heat dissipation fins to the insulator surface or increasing the surface area of the fittings. However, such designs often lead to increased insulator structure complexity and weight, and external heat dissipation structures may disrupt the overall electric field distribution of the insulator, affecting insulation performance. Furthermore, while existing technologies have attempted to introduce heat pipes as heat-conducting elements, they mostly employ external layouts or separate installation of the heat pipes from the fittings. This results in heat transfer requiring multiple interfaces, leading to high thermal resistance and hindering efficient axial heat transfer. Simultaneously, insufficient assembly precision between heat pipes and insulators in traditional manufacturing processes can easily create air gaps or poor contact, affecting long-term operational reliability.
[0004] In recent years, with the increasing demand for miniaturization and intensification of power equipment, balancing insulation performance and efficient heat dissipation within limited space has become a key technical challenge in the industry. Existing insulator heat dissipation solutions generally suffer from problems such as long heat transfer paths, uneven heat flux density, and high structural redundancy, making it difficult to meet the urgent needs of high-voltage transmission lines for compact and highly reliable heat-dissipating insulators. Therefore, there is an urgent need for a new type of heat-dissipating insulator structure that, by optimizing the heat conduction path and integration process, can achieve rapid and directional heat dissipation while ensuring insulation performance, thereby improving equipment operational stability and lifespan. Utility Model Content
[0005] The technical problem to be solved by this utility model embodiment is to provide a high-efficiency heat dissipation insulator with built-in heat pipe, which can overcome the defects of traditional insulators that are not heat dissipated enough under high load or high temperature environment, resulting in excessive internal temperature rise and affecting operational stability and lifespan.
[0006] To address the aforementioned technical problems, this utility model provides a high-efficiency heat-dissipating insulator with a built-in heat pipe, comprising an insulator body, an upper fitting, a heat pipe, a heat dissipation medium, and a lower fitting. The insulator body has a through-hole structure and internal threads at both the upper and lower openings. The outer walls of the upper and lower fittings are respectively provided with external threads in the upper and lower openings, forming a sealed inner cavity inside the insulator body. The heat dissipation medium fills the inner cavity. The upper fitting has an annular positioning groove, and the upper end of the heat pipe is fixedly embedded in the annular positioning groove. The body of the heat pipe is disposed in the inner cavity and in contact with the heat dissipation medium. The heat pipe includes a heat pipe shell and a liquid-absorbing core structure disposed on the inner wall of the heat pipe shell. The heat pipe is filled with a phase change working fluid.
[0007] The phase change working fluid includes one of deionized water, methanol, ethanol, and acetone.
[0008] The upper end of the heat pipe is fixedly connected to the annular positioning groove by welding or expansion.
[0009] The liquid-absorbing core structure is one of the following: powder sintering structure, groove structure, wire mesh weaving structure, and metal fiber sintering structure.
[0010] The thickness of the heat pipe outer shell is 0.1-0.3 mm, and the thickness of the liquid-absorbing core structure is 0.5-0.8 mm.
[0011] The distance between the lower end of the heat pipe and the inner top surface of the lower fitting is more than 5 mm.
[0012] The upper fitting has an annular outer wall with external threads and a recess at the top center with internal threads for connecting to a live conductor via bolts.
[0013] The lower fitting is a copper plate structure.
[0014] The volume of the phase change working fluid accounts for 10% to 20% of the volume of the heat pipe cavity.
[0015] The number of heat pipes is 3-5.
[0016] Implementing this utility model embodiment has the following beneficial effects: This utility model optimizes the heat transfer path inside the insulator by using a built-in high-efficiency heat pipe and a heat dissipation medium filling, significantly reducing the thermal resistance from the heat-generating area to the heat-dissipating area, greatly improving the overall heat dissipation performance of the insulator, and is especially suitable for high-load conditions; at the same time, it effectively avoids premature aging of materials caused by internal heat accumulation, extends the service life of the insulator, and enhances its operational stability and reliability in harsh environments. Attached Figure Description
[0017] Figure 1 This is a front view and a cross-sectional view of the present invention;
[0018] Figure 2 This is a top view of the present invention;
[0019] Figure 3 This is a bottom view of the present invention;
[0020] Figure 4 This is a front view and a cross-sectional view of the upper fitting of this utility model. Figure 1 ;
[0021] Figure 5 This is a front view and a cross-sectional view of the upper fitting of this utility model. Figure 2 ;
[0022] Figure 6 This is a front view and a cross-sectional view of the heat pipe of this utility model;
[0023] Figure 7 This is a schematic diagram of the structure used in this utility model;
[0024] Figure 8 This is a schematic diagram of heat transfer in this utility model;
[0025] Figure descriptions: 1-Insulator body, 2-Upper fitting, 3-Heat pipe, 4-Heat dissipation medium, 5-Lower fitting, 31-Heat pipe shell, 32-Liquid wick structure, 11-Insulator body, 12-Skirt skirt, 61-Bolt, 62-Current conductor, 63-Equipment housing. Detailed Implementation
[0026] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.
[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention. The present invention will be described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.
[0028] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0030] Example 1:
[0031] This utility model embodiment provides a high-efficiency heat dissipation insulator with built-in heat pipe, including an insulator body 1, an upper fitting 2, a heat pipe 3, a heat dissipation medium 4, and a lower fitting 5.
[0032] Combination Figure 2 , Figure 3 As shown, the upper fitting 2 is fixedly installed at the upper opening of the insulator body 1. The upper fitting 2 has an annular outer wall with external threads for threaded connection with the internal threads at the upper opening of the insulator body 1. The heat dissipation medium 4 fills the inner cavity formed between the inner wall of the insulator body 11 and the heat pipe 3. The lower fitting 5 is fixedly installed at the bottom of the insulator body 1 via a threaded connection.
[0033] The insulator body 1 consists of an insulator body 11 and sheds 12, and is manufactured through injection molding, 3D printing additive manufacturing, and sintering processes. In this invention, the insulator body 1 is made of ceramic, glass, or epoxy resin materials, possessing good insulation performance and mechanical strength. The sheds 12 are used to increase the creepage distance.
[0034] The heat pipe 3 is located inside the insulator body 1. The heat pipe 3 is filled with a phase change working fluid, the volume of which is 10% to 20% of the total volume of the cavity inside the heat pipe. Examples of phase change working fluids include deionized water, methanol, ethanol, and acetone.
[0035] like Figure 4 , Figure 5 As shown, the upper fitting 2 is a copper heat dissipation structure housing component with an annular positioning groove at its bottom.
[0036] like Figure 6As shown, the heat pipe 3 is made of copper. The heat pipe 3 includes a heat pipe shell 31 and a wick structure 32. The thickness of the heat pipe shell 31 is 0.1-0.3 mm, preferably 0.25 mm. The wick structure 32 is, for example, a powder sintering structure, a grooved structure, a wire mesh braiding structure, or a metal fiber sintering structure, and has a thickness of 0.5-0.8 mm, preferably 0.55 mm.
[0037] The number of heat pipes 3 is set to 3 to 5, which can be selected according to actual needs. The upper end of the heat pipe 3 is embedded in the annular positioning groove of the upper hardware and fixedly connected by expansion or welding. The lower end of the heat pipe 3 is at least 5mm away from the inner top surface of the lower hardware 5, preferably 10mm, and is immersed in the heat dissipation medium in the inner cavity.
[0038] The heat dissipation medium 4 is, for example, transformer oil, synthetic ester insulating liquid, natural ester insulating liquid, silicone oil, etc.
[0039] like Figure 7 As shown, the top of the upper fitting 2 has a recess with threads for connection to the live conductor 62 via bolts 61. The insulator body 1 is fixedly connected to the equipment housing 63.
[0040] The lower fitting 5 adopts a copper plate structure, which has good thermal conductivity.
[0041] like Figure 8 As shown, the main heat transfer path of this invention can be described as follows: Heat is first input to the upper fitting 2. The liquid working fluid adsorbed by the wick structure 32 in the heat pipe 3 evaporates into a gaseous state upon heating. When it diffuses to the extension cavity, it condenses into a liquid state on the inner wall surface at the bottom of the heat pipe 3, releasing the latent heat of phase change. The liquid working fluid flows back through the wick structure 32 to maintain the phase change heat transfer cycle. Subsequently, the heat is conducted to the lower fitting 5 and the insulator body 1 via the heat dissipation medium 4 outside the bottom of the heat pipe, ultimately achieving heat output from the system. This heat transfer process reflects the unique design of this invention in terms of thermal management, effectively realizing the output of heat to the lower fitting 5 and the insulator body 1, thereby improving the overall system heat dissipation efficiency, effectively reducing the operating temperature of the insulator, and improving the reliability and service life of the insulator.
[0042] Example 2:
[0043] This utility model embodiment provides a high-efficiency heat dissipation insulator structure with built-in heat pipe, including insulator body 1, upper fitting 2, heat pipe 3, heat dissipation medium 4, and lower fitting 5.
[0044] Combination Figure 2 , Figure 3As shown, the upper fitting 2 is fixedly installed at the upper opening of the insulator body 1. The upper fitting 2 has an annular outer wall with external threads for threaded connection with the internal threads at the upper opening of the insulator body 1. The heat dissipation medium 4 fills the inner cavity formed between the inner wall of the insulator body 11 and the heat pipe 3. The lower fitting 5 is fixedly installed at the bottom of the insulator body 1 via a threaded connection.
[0045] The insulator body 1 consists of an insulator body 11 and sheds 12, and is manufactured by injection molding. In this invention, the insulator body 1 is made of epoxy resin material, which has good insulation performance and mechanical strength. The sheds 12 are used to increase the creepage distance.
[0046] The heat pipe 3 is disposed inside the insulator body 1. The heat pipe 3 is filled with a phase change working fluid, the volume of which is 10% to 20% of the total volume of the cavity inside the heat pipe, such as 13%, 15%, or 18%. The phase change working fluid is, for example, deionized water.
[0047] like Figure 4 , Figure 5 As shown, the upper fitting is a copper heat dissipation structure housing component. The bottom of the upper fitting has an annular positioning groove. (See attached image.) Figure 6 As shown, the heat pipe 3 is made of copper. The heat pipe 3 includes a heat pipe outer shell 31 and a wick structure 32. The thickness of the heat pipe outer shell 31 is 0.25 mm. The wick structure 32 is, for example, a powder-sintered structure with a thickness of 0.55 mm. Four heat pipes 3 are provided, with their upper ends embedded in the annular positioning groove of the upper fitting and fixedly connected by expansion or welding. The distance between the lower end of the heat pipe 3 and the inner top surface of the lower fitting 5 is 8 mm.
[0048] The heat dissipation medium 4 is, for example, transformer oil.
[0049] like Figure 7 As shown, the top of the upper fitting 2 has a recess with threads for connection to the live conductor 62 via bolts 61. The insulator body 1 is fixedly connected to the equipment housing 63.
[0050] The lower fitting 5 adopts a copper plate structure, which has good thermal conductivity.
[0051] like Figure 8As shown, the main heat transfer path of this invention can be described as follows: Heat is first input to the upper fitting 2. The liquid working fluid adsorbed by the wick structure 32 in the heat pipe 3 evaporates into a gaseous state upon heating. When it diffuses to the extension cavity, it condenses into a liquid state on the inner wall surface at the bottom of the heat pipe 3, releasing the latent heat of phase change. The liquid working fluid flows back through the wick structure 32 to maintain the phase change heat transfer cycle. Subsequently, the heat is conducted to the lower fitting 5 and the insulator body 1 via the heat dissipation medium 4 outside the bottom of the heat pipe, ultimately achieving heat output from the system. This heat transfer process reflects the unique design of this invention in terms of thermal management, effectively realizing the output of heat to the lower fitting 5 and the insulator body 1, thereby improving the overall system heat dissipation efficiency, effectively reducing the operating temperature of the insulator, and improving the reliability and service life of the insulator.
[0052] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.
Claims
1. A high-efficiency heat dissipation insulator with a built-in heat pipe, characterized in that, The insulator body (1), upper fitting (2), heat pipe (3), heat dissipation medium (4), and lower fitting (5) are included. The insulator body (1) has a through structure and internal threads at both the upper and lower openings. The outer walls of the upper fitting (2) and lower fitting (5) are respectively set in the upper and lower openings by setting external threads, forming a closed inner cavity inside the insulator body (1). The heat dissipation medium (4) is filled in the inner cavity. The upper fitting (2) has an annular positioning groove. The upper end of the heat pipe (3) is fixedly embedded in the annular positioning groove. The body of the heat pipe (3) is set in the inner cavity and is in contact with the heat dissipation medium (4). The heat pipe (3) includes a heat pipe shell and a liquid-absorbing core structure (32) set on the inner wall of the heat pipe shell. The heat pipe (3) is filled with a phase change working fluid.
2. The high-efficiency heat dissipation insulator with built-in heat pipe according to claim 1, characterized in that, The phase change working fluid includes one of deionized water, methanol, ethanol, and acetone.
3. The high-efficiency heat dissipation insulator with built-in heat pipe according to claim 1, characterized in that, The upper end of the heat pipe (3) is fixedly connected to the annular positioning groove by welding or expansion.
4. The high-efficiency heat dissipation insulator with built-in heat pipe according to claim 1, characterized in that, The liquid-absorbing core structure (32) is one of the following: powder sintering structure, groove structure, wire mesh weaving structure, and metal fiber sintering structure.
5. The high-efficiency heat dissipation insulator with built-in heat pipe according to claim 4, characterized in that, The thickness of the heat pipe shell is 0.1-0.3 mm, and the thickness of the liquid-absorbing core structure (32) is 0.5-0.8 mm.
6. The high-efficiency heat dissipation insulator with built-in heat pipe according to claim 1, characterized in that, The distance between the lower end of the heat pipe (3) and the inner top surface of the lower fitting (5) is more than 5 mm.
7. The high-efficiency heat dissipation insulator with built-in heat pipe according to claim 1, characterized in that, The upper fitting (2) has an annular outer wall with external threads and a recess at the top center with internal threads for connection with a live conductor (62) via bolts (61).
8. The high-efficiency heat dissipation insulator with built-in heat pipe according to claim 1, characterized in that, The lower fitting (5) is a copper plate structure.
9. The high-efficiency heat dissipation insulator with built-in heat pipe according to claim 1, characterized in that, The volume of the phase change working fluid accounts for 10% to 20% of the cavity volume of the heat pipe (3).
10. The high-efficiency heat dissipation insulator with built-in heat pipe according to claim 1, characterized in that, The number of heat pipes (3) is 3-5.