A 35kV tubular busbar terminal with high thermal conductivity

Abstract

The present invention relates to the field of voltage power transmission technology, specifically a high thermal conductivity 35kV tubular busbar terminal, comprising a main body, a heat conduction component, a heat dissipation component and a wiring component. The heat conduction component comprises a heat conduction sleeve, a flow channel group and a heat dissipation end plate. The flow channel group consists of a loop flow channel, a cross flow channel and a convex flow tube. A capillary flow channel is provided inside and filled with a heat pipe working medium. The phase change heat transfer of the heat pipe working medium is used to achieve efficient heat circulation transfer. The heat dissipation component comprises a number of ceramic base blocks and spiral heat dissipation wires on their surfaces. The heat dissipation wires are distributed in a ring array and electrically grounded for rapid heat dissipation and shielding of electromagnetic interference. The wiring component wraps and clamps the cable through a sleeve screw block and a number of clamping wires. The sleeve screw block is provided with a threaded connection and a torque limiting structure to improve the stability of the wiring. An insulating composite sleeve and a conductive medium are provided inside the heat conduction sleeve, which can evenly conduct electricity and effectively conduct the heat generated by the electrothermal effect.

Description

Technical Field

[0001] The present invention relates to the technical field of voltage power transmission, in particular to a 35kV tubular bus terminal with high thermal conductivity. Background Art

[0002] In existing high-power, high-voltage equipment, tubular busbar terminals are an essential component of the power transmission system. They are typically used to connect and conduct high currents, while also providing insulation and heat dissipation. Traditional tubular busbar terminals typically utilize a structure combining metal conductive components with an external insulating layer. Their heat conduction and heat dissipation functions rely on the thermal conductivity of the metal material, while heat is transferred to the external environment through heat sinks or a single heat conduction path. However, traditional technical solutions often use simple heat conduction and heat dissipation methods, which cannot effectively handle the large amounts of heat generated by the equipment under high-power and high-current operating conditions, thereby limiting the equipment's operating performance and service life.

[0003] While some traditional technologies improve heat dissipation by adding heat sinks or using highly thermally conductive materials, the relatively limited heat transfer path can easily lead to localized overheating during high-power operation, and the heat dissipation efficiency is low, resulting in poor long-term device stability. Furthermore, traditional device heat dissipation designs often struggle to maintain electromagnetic shielding performance, making them susceptible to external electromagnetic interference, which reduces device reliability and electromagnetic compatibility.

[0004] In view of the problems of low heat dissipation efficiency, local overheating, poor operating stability and electromagnetic interference in the existing technology, there is an urgent need for a new tubular busbar terminal structure that can provide efficient heat dissipation, good thermal management and electromagnetic shielding. Summary of the Invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0006] To this end, the technical solution adopted in the present invention is:

[0007] A high thermal conductivity 35kV tubular busbar terminal, comprising: a main body, a heat conduction assembly, a heat dissipation assembly, and a wiring assembly; wherein the main body is fixedly sleeved on the outside of the heat conduction assembly, the heat conduction assembly comprises a heat conduction sleeve, a flow channel group, and heat dissipation end plates fixed to both ends of the heat conduction sleeve surface, the flow channel group comprises a circulation channel and a cross flow channel located on the surface of the heat conduction sleeve, and a convex flow tube located on the surface of the heat conduction sleeve, the cross flow channels at both ends are connected through the circulation channel and the convex flow tube, and the inner sides of the circulation channel, the cross flow channel, and the convex flow tube are provided with capillary flow channels and filled with heat pipe working medium; the heat dissipation assembly The components include several ceramic base blocks and heat dissipation strips fixed on the surfaces of the several ceramic base blocks. The surfaces of the ceramic base blocks are provided with fitting grooves that are compatible with the convex flow tubes, and the ceramic base blocks are fixedly adhered to the surfaces of the convex flow tubes; the heat dissipation end plates are fixed to the outer periphery of the circulation channel, the inner side of the thermal sleeve is provided with an insulating composite sleeve layer, and the interior of the thermal sleeve is filled with a conductive medium; the wiring assembly includes a sleeve screw block and several clamping strips. The sleeve screw blocks are fixed to the two ends of the clamping strip, and the several clamping strips are evenly arranged in the circumferential direction. The surface of the sleeve screw block is provided with screw threads connected to the two ends of the thermal sleeve.

[0008] In a possible embodiment, the insulating composite sleeve layer inside the thermally conductive sleeve is made of a ceramic-based composite material with high thermal conductivity. The thermal conductivity of the ceramic-based composite material is greater than 10 W / m·K to enhance thermal conductivity.

[0009] In a possible embodiment, the working medium of the heat pipe is a water-based liquid or a fluorine-based liquid, and heat is transferred in the cross flow channel by phase change heat transfer.

[0010] In one possible embodiment, the heat dissipation strips are metal strip structures and are arranged in a spiral shape. They are distributed in a ring array on the surface of the ceramic base block. The heat dissipation strips are electrically grounded to improve heat dissipation and electromagnetic shielding performance.

[0011] In a possible embodiment, the clamping bar of the wiring assembly is made of low-carbon steel wire material, and its surface is provided with anti-slip grooves to increase the clamping strength of the cable.

[0012] In a possible embodiment, the circulation channels are attached to the surface of the heat conducting sleeve in a staggered manner to connect the cross flow channels at both ends, and a plurality of convex flow tubes are evenly distributed at the intersection points of each circulation channel, and the convex flow tubes are connected to the inside of the circulation channel.

[0013] In a possible implementation, a separate conductive element is provided in the heat-conducting sleeve of the heat-conducting assembly, and is in contact with the cable core through a conductive medium to achieve uniform electrical conduction.

[0014] In a possible implementation, the heat dissipation wire rod of the heat dissipation assembly is made of aluminum alloy and is anodized to improve wear resistance and thermal conductivity.

[0015] In a possible implementation, the sleeve screw block on the wiring assembly is provided with a torque limiting structure to ensure stability and safety of cable clamping.

[0016] Based on the above technical solution, the present invention's high-thermal-conductivity 35kV tubular busbar terminal achieves heat circulation through phase-change heat transfer of the working medium in the heat pipes within the thermally conductive assembly, combined with the capillary flow channel design within the flow channel group. This solves the problems of low heat dissipation efficiency and localized overheating associated with conventional tubular busbar terminals. Furthermore, the spirally arranged heat dissipating wire rods within the heat dissipation assembly significantly improve the device's heat dissipation performance and operational stability. Furthermore, the electrical grounding of the heat dissipating wire rods forms an electromagnetic shielding layer, effectively isolating electromagnetic interference and ensuring the device's electromagnetic compatibility. The structural design of the wiring assembly enhances cable clamping strength and wiring stability, making the device safer and more reliable.

[0017] The beneficial effects achieved by the present invention are:

[0018] 1. In the present invention, the working medium of the heat pipe evaporates into a gaseous state after being heated in the cross flow channel, flows to the circulating flow channel and the convex flow tube through the capillary flow channel, condenses into a liquid again after dissipating heat and flows back, completing the heat circulation transfer, significantly improving the efficiency of heat transfer and dissipation, solving the problems of low heat dissipation efficiency and local overheating in high-power, high-voltage equipment, providing a more stable and reliable thermal management solution, and at the same time enhancing the service life and operating performance of the equipment.

[0019] 2. In the present invention, the convex flow tubes are evenly distributed at the staggered points of the circulation channel, so that heat can be evenly transferred to the heat dissipation component to avoid local overheating. The heat dissipation end plate and the heat dissipation component are combined to form a multi-level heat dissipation channel to improve the heat conduction and heat dissipation efficiency.

[0020] 3. In the present invention, spiral heat dissipation strips are provided on the surface of the ceramic base block. The tightly arranged structure can improve the heat dissipation efficiency. After being electrically grounded, a shielding layer is formed, which effectively isolates electromagnetic interference and ensures the electromagnetic compatibility of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the internal structure of a heat dissipation assembly according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the heat conduction component and main pipe structure according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic structural diagram of a heat dissipation assembly according to an embodiment of the present invention;

[0025] Figure 5This is a schematic structural diagram of a heat conduction component according to an embodiment of the present invention;

[0026] Figure 6 A schematic diagram of the cross-sectional structure of a heat conducting component according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic structural diagram of the wiring assembly in its original state and wiring state according to an embodiment of the present invention.

[0028] Reference numerals:

[0029] 100, main body;

[0030] 200, heat conduction assembly; 210, heat conduction sleeve; 220, flow channel assembly; 230, heat dissipation end plate; 211, insulation composite sleeve layer; 221, circulation channel; 222, cross flow channel; 223, convex flow pipe;

[0031] 300, heat dissipation assembly; 310, ceramic base block; 320, heat dissipation wire rod;

[0032] 400, wiring assembly; 410, socket screw block; 420, wire clip. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features therein can be combined with each other without conflict.

[0034] It is to be understood that these descriptions are illustrative only and are not intended to limit the scope of the invention.

[0035] The following is combined with Figures 1 to 7 A high thermal conductivity 35 kV tubular busbar terminal is described according to some embodiments of the present invention.

[0036] Implementation Method 1

[0037] like Figures 1 to 7 As shown, the present invention provides a high thermal conductivity 35kV tubular bus terminal, comprising: a main pipe 100, a heat conduction component 200, a heat dissipation component 300 and a wiring component 400.

[0038] The main pipe 100 is fixedly sleeved on the outside of the heat conducting component 200 to provide external support and protection.

[0039] The heat conducting assembly 200 includes a heat conducting sleeve 210 , a flow channel assembly 220 , and heat dissipation end plates 230 fixed to both ends of the surface of the heat conducting sleeve 210 .

[0040] An insulating composite sleeve layer 211 is provided inside the thermally conductive sleeve 210 . The insulating composite sleeve layer 211 is made of a ceramic-based composite material with high thermal conductivity and a thermal conductivity greater than 10 W / m·K, which can significantly improve the thermal conductivity performance.

[0041] The interior of the thermal sleeve 210 is filled with a conductive medium, which is in direct contact with the cable core to achieve uniform current conduction. At the same time, the heat generated by the electrothermal effect is quickly conducted to the flow channel group 220 through the high thermal conductivity thermal sleeve 210.

[0042] The flow channel group 220 includes a circular flow channel 221 , a cross flow channel 222 and a convex flow tube 223 .

[0043] The annular flow channel 221 is attached to the surface of the heat conducting sleeve 210 in a staggered manner and is communicated with the cross flow channel 222 and the interior of the convex flow tube 223 to form an integrally connected fluid circuit.

[0044] The cross flow channel 222 is located on the surface of the heat conducting sleeve 210 and is used to accommodate water-based liquid or fluorine-based liquid as the working medium of the heat pipe. The working medium of the heat pipe circulates and transfers heat through phase change heat transfer.

[0045] The convex flow tubes 223 are evenly distributed at the intersecting points of the annular flow channel 221 , so that heat can be efficiently transferred to the heat dissipation component 300 to avoid local overheating.

[0046] The capillary flow channel is designed to quickly return the condensed heat pipe working medium to the cross flow channel 222 through capillary force, completing the heat circulation transfer and significantly improving the heat conduction efficiency.

[0047] The heat dissipation assembly 300 includes a plurality of ceramic base blocks 310 and heat dissipation wire rods 320 fixed to the surfaces of the plurality of ceramic base blocks 310 .

[0048] The surface of the ceramic base block 310 is provided with a fitting groove adapted to the convex flow tube 223 . The ceramic base block 310 is fixedly adhered to the surface of the convex flow tube 223 to form an efficient heat transfer path.

[0049] The heat dissipation strips 320 are metal strip structures, arranged in a spiral shape, and distributed in a ring array on the surface of the ceramic base block 310, which can significantly improve the heat dissipation efficiency.

[0050] The heat dissipation strip 320 is electrically grounded to form a shielding layer, which can effectively isolate electromagnetic interference and improve the electromagnetic compatibility and operational reliability of the equipment.

[0051] The wiring assembly 400 includes a box screw 410 and a plurality of clamping strips 420 .

[0052] The sleeve screw blocks 410 are fixed to both ends of the clamping bars 420 , and a plurality of clamping bars 420 are evenly arranged in a circumferential direction for wrapping and clamping cables.

[0053] The surface of the sleeve screw block 410 is provided with screw threads connected to both ends of the thermal sleeve 210. The wiring assembly 400 can be tightly fixed to the thermal sleeve 210 through the screw thread connection.

[0054] The plurality of clamping wires 420 are made of low-carbon steel wire material, and the surface thereof is provided with anti-slip grooves, which can effectively increase the clamping strength of the cable and ensure the stability of the wiring.

[0055] The sleeve screw block 410 is also provided with a torque limiting structure to ensure stability and safety during the cable clamping process.

[0056] How it works

[0057] Conductive and wiring functions:

[0058] After the insulation layer of the cable connector is stripped, the wire core is inserted into the inner side of the thermal sleeve 210 through the sleeve screw block 410 of the wiring assembly 400. By twisting the sleeve screw block 410, the screw threads cause the two sleeve screw blocks 410 to move relative to each other, and at the same time, several clamping wires 420 are twisted synchronously, gradually wrapping the cable surface and achieving clamping and fixation.

[0059] The conductive medium inside the thermal sleeve 210 is in full contact with the cable core, thus conducting current uniformly and improving the power connection stability.

[0060] Heat dissipation function:

[0061] During operation of the device, heat generated by the cable core due to the electrothermal effect is conducted to the flow channel assembly 220 through the conductive medium, the insulating composite sheath 211 and the thermal conductive sheath 210 .

[0062] The working medium of the heat pipe evaporates into gas after being heated in the cross flow channel 222 , flows through the capillary flow channel to the annular flow channel 221 and the convex flow tube 223 , and is further transferred to the heat dissipation component 300 .

[0063] The heat dissipation strip 320 is combined with the heat dissipation end plate 230 to cool the heat pipe working medium. The condensed heat pipe working medium flows back to the cross flow channel 222, forming a heat pipe effect of cyclic heat transfer, quickly dissipating heat and effectively avoiding local overheating of the equipment.

[0064] Electromagnetic shielding function:

[0065] The heat dissipation rods 320 are distributed in a spiral ring array and electrically grounded to form an electromagnetic shielding layer, which effectively isolates external electromagnetic interference, ensures the electromagnetic compatibility of the equipment, and improves the reliability and stability of the equipment operation.

[0066] Implementation Method 2

[0067] Further optimization based on implementation method 1:

[0068] The heat dissipation wire rod 320 is made of aluminum alloy and is anodized to improve wear resistance and thermal conductivity, thereby enhancing the reliability and heat dissipation effect of the heat dissipation assembly 300.

[0069] The thermal conductive sleeve 210 of the thermal conductive assembly 200 is provided with a separate conductive element, which works together with the conductive medium to further improve the uniform conductive performance of the cable core.

[0070] The working medium of the heat pipe can be water-based liquid or fluorine-based liquid. The medium type can be adjusted according to actual needs to meet the heat dissipation requirements of different environments and application scenarios.

[0071] Through the above-mentioned specific implementation methods, the present invention significantly improves the thermal conductivity, heat dissipation efficiency, electromagnetic shielding capability and cable connection stability of the equipment, and has broad application prospects.

[0072] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, illustrative uses of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0073] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A high thermal conductivity 35kV tubular busbar terminal, characterized in that: include: A main pipe (100), a heat-conducting component (200), a heat-dissipating component (300), and a wiring component (400); The main body (100) is fixedly sleeved on the outside of the heat-conducting assembly (200). The heat-conducting assembly (200) comprises a heat-conducting sleeve (210), a flow channel group (220), and heat-dissipating end plates (230) fixed to both ends of the surface of the heat-conducting sleeve (210). The flow channel group (220) comprises a circulating flow channel (221) and a cross flow channel (222) located on the surface of the heat-conducting sleeve (210), and a convex flow tube (223) located on the surface of the heat-conducting sleeve (210). The cross flow channels (222) at both ends are connected through the circulating flow channel (221) and the convex flow tube (223). Capillary flow channels are provided inside the circulating flow channel (221), the cross flow channel (222), and the convex flow tube (223) and are filled with a heat pipe working medium. The wiring assembly (400) comprises a sleeve screw block (410) and a plurality of clamping strips (420), the sleeve screw block (410) being fixed to both ends of the clamping strip (420), and the plurality of clamping strips (420) being evenly arranged in a circumferential direction, and a surface of the sleeve screw block (410) being provided with screw threads connected to both ends of the heat conducting sleeve (210); The heat dissipation end plate (230) is fixed to the outer periphery of the circulation channel (221); an insulating composite sleeve layer (211) is provided on the inner side of the heat-conducting sleeve (210), and the interior of the heat-conducting sleeve (210) is filled with a conductive medium; the circulation channels (221) are arranged in a staggered manner on the surface of the heat-conducting sleeve (210) to achieve communication with the cross flow channels (222) at both ends; a plurality of convex flow tubes (223) are evenly distributed at the staggered points of each circulation channel (221), and the convex flow tubes (223) are communicated with the interior of the circulation channel (221); The sleeve screw block (410) on the wiring assembly (400) is provided with a torque limiting structure.

2. The high thermal conductivity 35kV tubular busbar terminal according to claim 1, characterized in that: The insulating composite sleeve layer (211) inside the thermally conductive sleeve (210) is made of a ceramic-based composite material with high thermal conductivity, and the thermal conductivity of the ceramic-based composite material is greater than 10 W / m·K.

3. The high thermal conductivity 35kV tubular busbar terminal according to claim 1, characterized in that: The working medium of the heat pipe is a water-based liquid or a fluorine-based liquid, and heat is conducted in the cross flow channel (222) by means of phase change heat transfer.

4. The high thermal conductivity 35kV tubular busbar terminal according to claim 1, characterized in that: The heat dissipation assembly (300) comprises a plurality of ceramic base blocks (310) and heat dissipation strips (320) fixed to the surfaces of the plurality of ceramic base blocks (310). The surfaces of the ceramic base blocks (310) are provided with fitting grooves adapted to the convex flow tubes (223), and the ceramic base blocks (310) are fixedly adhered to the surfaces of the convex flow tubes (223).

5. The high thermal conductivity 35kV tubular busbar terminal according to claim 4, characterized in that: The heat dissipation strips (320) are metal strip structures and are arranged in a spiral shape. They are distributed in a ring array on the surface of the ceramic base block (310). The heat dissipation strips (320) are electrically grounded to improve heat dissipation effects and electromagnetic shielding performance.

6. The high thermal conductivity 35kV tubular busbar terminal according to claim 1, characterized in that: The clamping wire (420) of the wiring assembly (400) is made of low-carbon steel wire material, and its surface is provided with anti-slip lines to increase the clamping strength of the cable.

7. The high thermal conductivity 35kV tubular busbar terminal according to claim 1, characterized in that: A separate conductive element is provided in the heat-conducting sleeve (210) of the heat-conducting assembly (200), and is in contact with the cable core via a conductive medium.

8. The high thermal conductivity 35kV tubular busbar terminal according to claim 4, characterized in that: The heat dissipation wire rod (320) of the heat dissipation assembly (300) is made of aluminum alloy material and is anodized.

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