High-thermal-conductivity 35kv tubular bus terminal

Abstract

The invention relates to the technical field of voltage power transmission, in particular to a high-thermal-conductivity 35kv tubular bus terminal which comprises a main tube body, a heat conduction assembly, a heat dissipation assembly and a wiring assembly. The heat conduction assembly comprises a heat conduction sleeve, a flow channel set and a heat dissipation end disc, the flow channel set is composed of an annular flow channel, a cross flow channel and a convex flow pipe, a capillary flow channel is arranged in the flow channel set, a heat pipe working medium is filled, and efficient circulation transfer of heat is achieved through phase change heat transfer of the heat pipe working medium. The heat dissipation assembly comprises a plurality of ceramic base blocks and spiral heat dissipation wire rods on the surfaces of the ceramic base blocks, and the heat dissipation wire rods are distributed in an annular array mode, electrically grounded and used for rapidly dissipating heat and shielding electromagnetic interference. According to the wiring assembly, wrapping and clamping of a cable are achieved through the head sleeving screw block and the multiple wire clamping strips, the head sleeving screw block is provided with a thread connection and torque limiting structure, and the wiring stability is improved. The insulating composite sleeve layer and the conducting medium are arranged in the heat conducting sleeve, so that uniform conduction can be realized, and heat generated by an electrothermal effect can be effectively conducted.

Description

Technical Field

[0001] The present invention relates to the technical field of voltage power transmission, and particularly to a 35kv tubular busbar terminal with high thermal conductivity. Background Art

[0002] In existing high-power and high-voltage equipment, the tubular busbar terminal is an important part of the power transmission system. It is usually used to connect and conduct large currents, and provide insulation and heat dissipation functions. Traditional tubular busbar terminals typically adopt a structure combining metal conductive components with an external insulation layer. Their heat conduction and dissipation functions rely on the thermal conductivity of the metal material, and at the same time, heat is transferred to the external environment through heat sinks or a single heat conduction path. However, simple heat conduction and dissipation methods are mostly used in traditional technical solutions, which cannot effectively cope with the large amount of heat generated by the equipment under high-power and high-current operating conditions, thus limiting the operating performance and service life of the equipment.

[0003] Although some traditional technologies improve the heat dissipation effect by increasing heat sinks or using high-thermal-conductivity materials, due to the relatively single heat transfer path, local overheating is likely to occur during high-power operation, and the heat dissipation efficiency is low, resulting in poor long-term operation stability of the equipment. In addition, the heat dissipation design of traditional equipment often fails to take into account the electromagnetic shielding performance, and is easily affected by external electromagnetic interference, thereby reducing the reliability and electromagnetic compatibility of the equipment.

[0004] In view of the problems of low heat dissipation efficiency, local overheating, poor operation stability, and electromagnetic interference in the prior art, 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 by the present invention is as follows: A 35kV tubular busbar terminal with high thermal conductivity, comprising: a main pipe body, a heat conduction component, a heat dissipation component and a wiring component; wherein, the main pipe body is fixedly sleeved outside the heat conduction component, and the heat conduction component includes a heat conduction sleeve, a flow channel group and heat dissipation end plates fixed at both ends of the surface of the heat conduction sleeve. The flow channel group includes a circumferential flow channel and an intersecting flow channel on the surface of the heat conduction sleeve and a convex flow pipe on the surface of the heat conduction sleeve. The two intersecting flow channels are connected through the circumferential flow channel and the convex flow pipe, and capillary flow channels are provided inside the circumferential flow channel, the intersecting flow channel and the convex flow pipe and are filled with a heat pipe working medium; the heat dissipation component includes a plurality of ceramic base blocks and heat dissipation disk strips fixed on the surfaces of the plurality of ceramic base blocks. A fitting groove adapted to the convex flow pipe is provided on the surface of the ceramic base block, and the ceramic base block is fixedly pasted on the surface of the convex flow pipe; the heat dissipation end plate is fixed on the outer periphery of the circumferential flow channel, an insulating composite layer is provided inside the heat conduction sleeve, and a conductive medium is filled inside the heat conduction sleeve; the wiring component includes a socket screw block and a plurality of clamping strips. The socket screw block is fixed at both ends of the clamping strip, and the plurality of clamping strips are evenly arranged in the circumferential direction. Threads for connecting with both ends of the heat conduction sleeve are provided on the surface of the socket screw block.

[0007] In a possible implementation manner, the insulating composite layer inside the heat conduction sleeve is made of a ceramic matrix composite material with high thermal conductivity, and the thermal conductivity of the ceramic matrix composite material is greater than 10 W / m·K to enhance the thermal conductivity.

[0008] In a possible implementation manner, the heat pipe working medium is a water-based liquid or a fluorine-based liquid, and heat is conducted in the intersecting flow channel by means of phase change heat transfer.

[0009] In a possible implementation manner, the heat dissipation disk strip is a metal strip structure and is arranged in a spiral shape and distributed in an annular array on the surface of the ceramic base block. The heat dissipation disk strip is electrically grounded to improve the heat dissipation effect and electromagnetic shielding performance.

[0010] In a possible implementation manner, the clamping strip of the wiring component is made of low-carbon steel wire material, and anti-slip patterns are provided on its surface to increase the clamping strength of the cable.

[0011] In a possible implementation manner, the circumferential flow channel is attached to the surface of the heat conduction sleeve in a staggered manner to connect the two intersecting flow channels. A plurality of convex flow pipes are evenly distributed at the staggered points of each circumferential flow channel, and the convex flow pipe is internally connected to the circumferential flow channel.

[0012] In a possible implementation manner, a split conductive element is provided inside the heat conduction sleeve of the heat conduction component and is in contact with the cable core through a conductive medium to achieve uniform conduction.

[0013] In a possible implementation manner, the heat dissipation disk strip of the heat dissipation component is made of aluminum alloy material and is anodized to improve wear resistance and thermal conductivity.

[0014] In a possible implementation, a torque limiting structure is provided on the socket screw block of the wiring assembly to ensure the stability and safety of cable clamping.

[0015] Based on the above technical solution, for a 35 kV tubular busbar terminal with high thermal conductivity of the present invention, through the phase change heat transfer of the working medium of the heat pipe inside the heat conduction component, combined with the capillary flow channel design in the flow channel group, the cyclic transfer of heat is completed, solving the problems of low heat dissipation efficiency and local overheating of traditional tubular busbar terminals; at the same time, combined with the spiral arrangement of the heat dissipation disc strips in the heat dissipation component, the heat dissipation performance and operation stability of the equipment are significantly improved. In addition, the electrical grounding of the heat dissipation disc strips forms an electromagnetic shielding layer, effectively isolating electromagnetic interference and ensuring the electromagnetic compatibility of the equipment; the structural design of the wiring assembly improves the cable clamping strength and the stability of wiring, making the equipment operation safer and more reliable.

[0016] The beneficial effects achieved by the present invention are as follows: 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 through the capillary flow channel to the circulation channel and the convex flow pipe, recondenses into a liquid state after heat dissipation and flows back, completing the cyclic transfer of heat, significantly improving the efficiency of heat transfer and dissipation, solving the problems of low heat dissipation efficiency and local overheating in high-power and high-voltage equipment, providing a more stable and reliable thermal management solution, and at the same time enhancing the service life and operation performance of the equipment.

[0017] 2. In the present invention, the convex flow pipes are evenly distributed at the staggered positions of the circulation channel, enabling heat to be evenly transferred to the heat dissipation component, avoiding local overheating phenomena, and combining with the heat dissipation end plate and the heat dissipation component to form a multi-stage heat dissipation channel, improving the heat conduction and heat dissipation efficiency.

[0018] 3. In the present invention, the surface of the ceramic base block is provided with spiral heat dissipation disc strips, the close arrangement of which can improve the heat dissipation efficiency, and after electrical grounding, a shielding layer is formed, effectively isolating electromagnetic interference and ensuring the electromagnetic compatibility of the equipment. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 It is a schematic diagram of the internal structure of the heat dissipation component of an embodiment of the present invention; Figure 3 It is a schematic diagram of the heat conduction component and the main pipe body of an embodiment of the present invention; Figure 4 It is a schematic diagram of the heat dissipation component of an embodiment of the present invention; Figure 5 It is a schematic diagram of the heat conduction component of an embodiment of the present invention; Figure 6Schematic cross-sectional structure diagram of a heat conduction component according to an embodiment of the present invention; Figure 7 Schematic structure diagrams of the original state and the wired state of a wiring component according to an embodiment of the present invention.

[0020] Reference numerals: 100, main pipe body; 200, heat conduction component; 210, heat conduction sleeve; 220, flow channel group; 230, heat dissipation end plate; 211, insulating composite sleeve layer; 221, circulating flow channel; 222, cross flow channel; 223, convex flow pipe; 300, heat dissipation component; 310, ceramic base block; 320, heat dissipation disk strip; 400, wiring component; 410, socket head screw block; 420, clamping wire strip. Detailed implementation manners

[0021] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the specific implementation manners and with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0022] It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention.

[0023] The following combines the attached Figures 1 to 7 Describe a 35kv tubular busbar terminal with high thermal conductivity provided by some embodiments of the present invention.

[0024] Embodiment 1 As Figures 1 to 7 shown, the present invention provides a 35kv tubular busbar terminal with high thermal conductivity, including: a main pipe body 100, a heat conduction component 200, a heat dissipation component 300 and a wiring component 400.

[0025] The main pipe body 100 is fixedly sleeved outside the heat conduction component 200 for providing external support and protection.

[0026] The heat conduction component 200 includes a heat conduction sleeve 210, a flow channel group 220 and heat dissipation end plates 230 fixed at both ends of the surface of the heat conduction sleeve 210.

[0027] An insulating composite sleeve layer 211 is arranged inside the heat conduction sleeve 210. The insulating composite sleeve layer 211 is made of a ceramic matrix composite material with high thermal conductivity, and the thermal conductivity is greater than 10 W / m·K, which can significantly improve the heat conduction performance.

[0028] The inside of the heat conduction sleeve 210 is filled with a conductive medium, and the conductive medium is in direct contact with the cable core to achieve uniform conduction of current. At the same time, the heat generated by the electrothermal effect is quickly conducted to the flow channel group 220 through the highly heat-conductive heat conduction sleeve 210.

[0029] The flow channel group 220 includes a circulation channel 221, an intersection channel 222, and a convex flow tube 223.

[0030] The circulation channel 221 is attached to the surface of the heat conduction sleeve 210 in a staggered manner and is internally connected to the intersection channel 222 and the convex flow tube 223 to form an overall connected fluid circuit.

[0031] The intersection channel 222 is located on the surface of the heat conduction sleeve 210 and is used to accommodate the working medium of the heat pipe, such as water-based liquid or fluorine-based liquid. The working medium of the heat pipe conducts heat in a cyclic manner through the phase change heat transfer method.

[0032] The convex flow tubes 223 are evenly distributed at the staggered positions of the circulation channel 221, enabling heat to be efficiently transferred to the heat dissipation component 300 and avoiding local overheating.

[0033] The capillary flow channel is designed to quickly return the condensed working medium of the heat pipe to the intersection channel 222 through capillary force to complete the cyclic heat transfer, significantly improving the heat conduction efficiency.

[0034] The heat dissipation component 300 includes a number of ceramic base blocks 310 and heat dissipation disk strips 320 fixed on the surfaces of the number of ceramic base blocks 310.

[0035] The surface of the ceramic base block 310 is provided with a fitting groove adapted to the convex flow tube 223, and the ceramic base block 310 is fixedly pasted on the surface of the convex flow tube 223 to form an efficient heat transfer path.

[0036] The heat dissipation disk strips 320 adopt a metal strip structure, are arranged in a spiral shape, and are distributed in a circular array on the surface of the ceramic base block 310, which can significantly improve the heat dissipation efficiency.

[0037] After the heat dissipation disk strips 320 are electrically grounded to form a shielding layer, it can effectively isolate electromagnetic interference and improve the electromagnetic compatibility and operation reliability of the device.

[0038] The wiring component 400 includes a socket screw block 410 and a number of clip strips 420.

[0039] The socket screw block 410 is fixed at both ends of the clip strips 420, and the number of clip strips 420 are evenly arranged in the circumferential direction and are used to wrap and clamp the cable.

[0040] The surface of the socket screw block 410 is provided with threads connected to both ends of the heat conduction sleeve 210. Through the threaded connection, the wiring component 400 can be tightly fixed to the heat conduction sleeve 210.

[0041] A number of clamping wires 420 are made of low-carbon steel wire material, and anti-slip patterns are provided on their surfaces, which can effectively increase the clamping strength of the cable and ensure the stability of wiring.

[0042] The socket screw block 410 is also provided with a torque limiting structure to ensure the stability and safety during the cable clamping process.

[0043] Working principle Conducting and wiring functions: After the insulating layer of the cable joint is peeled off, the wire core is inserted into the inner side of the heat conducting sleeve 210 through the socket screw block 410 of the wiring component 400. By twisting the socket screw block 410, the screw threads cause the two socket screw blocks 410 to move relative to each other, and at the same time, a number of clamping wires 420 twist synchronously, gradually wrap the surface of the cable and achieve clamping and fixing.

[0044] The conductive medium inside the heat conducting sleeve 210 uniformly conducts current through full contact with the cable wire core, thereby improving the power connection stability.

[0045] Heat dissipation function: During the operation of the device, the heat generated by the cable wire core due to the electrothermal effect is conducted to the flow channel group 220 through the conductive medium, the insulating composite sleeve layer 211 and the heat conducting sleeve 210.

[0046] The heat pipe working medium evaporates into a gas after being heated in the cross-flow channel 222, flows through the capillary channel to the circulation channel 221 and the convex flow pipe 223, and is further transferred to the heat dissipation component 300.

[0047] The heat dissipation disc strip 320 combines with the heat dissipation end disc 230 to cool the heat pipe working medium. The condensed heat pipe working medium flows back to the cross-flow channel 222, forming a cyclic heat transfer of the heat pipe effect, quickly dissipating heat, and effectively avoiding local overheating of the device.

[0048] Electromagnetic shielding function: The heat dissipation disc strip 320 is arranged in a spiral annular array and is electrically grounded to form an electromagnetic shielding layer, effectively isolating external electromagnetic interference, ensuring the electromagnetic compatibility of the device, and improving the reliability and stability of the device operation.

[0049] Embodiment 2 On the basis of Embodiment 1, it is further optimized: The heat dissipation disc strip 320 is made of aluminum alloy material and is anodized to improve wear resistance and thermal conductivity, and enhance the reliability and heat dissipation effect of the heat dissipation component 300.

[0050] The heat conducting sleeve 210 of the heat conducting component 200 is provided with a split conductive element, which acts together with the conductive medium to further improve the uniform conductivity of the cable wire core.

[0051] The working medium of the heat pipe can be selected from water-based liquids or fluorine-based liquids, and the medium type can be adjusted according to actual needs to meet the heat dissipation requirements of different environments and application scenarios.

[0052] Through the above specific embodiments, the present invention significantly improves the thermal conductivity, heat dissipation efficiency, electromagnetic shielding ability of the device and the stability of cable wiring, and has broad application prospects.

[0053] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A 35kV tubular busbar terminal with high thermal conductivity, characterized in that, Comprising: A main pipe body (100), a heat conduction component (200), a heat dissipation component (300) and a wiring component (400); The main pipe body (100) is fixedly sleeved outside the heat conduction component (200). The heat conduction component (200) includes a heat conduction sleeve (210), a flow channel group (220) and heat dissipation end plates (230) fixed at both ends of the surface of the heat conduction sleeve (210). The flow channel group (220) includes a circulation channel (221) and a cross-flow channel (222) on the surface of the heat conduction sleeve (210) and a convex flow pipe (223) on the surface of the heat conduction sleeve (210). The two ends of the cross-flow channel (222) are connected through the circulation channel (221) and the convex flow pipe (223), and capillary channels are provided inside the circulation channel (221), the cross-flow channel (222) and the convex flow pipe (223) and are filled with a heat pipe working medium; The wiring component (400) includes a socket screw block (410) and a plurality of wire clamping strips (420). The socket screw block (410) is fixed at both ends of the wire clamping strips (420), and the plurality of wire clamping strips (420) are evenly arranged in the circumferential direction. Threads for connecting with both ends of the heat conduction sleeve (210) are provided on the surface of the socket screw block (410).

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

3. A 35 kV tubular busbar terminal with high thermal conductivity according to claim 1, characterized in that, The heat pipe working medium 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. A 35 kV tubular busbar terminal with high thermal conductivity according to claim 1, characterized in that, The heat dissipation component (300) includes a plurality of ceramic matrix blocks (310) and heat dissipation disc strips (320) fixed on the surfaces of the plurality of ceramic matrix blocks (310). Fitting grooves adapted to the convex flow pipes (223) are provided on the surfaces of the ceramic matrix blocks (310), and the ceramic matrix blocks (310) are fixedly pasted on the surfaces of the convex flow pipes (223).

5. A 35kV tubular busbar terminal with high thermal conductivity according to claim 4, characterized in that, The heat dissipation disc strips (320) are of a metal strip structure and are arranged in a spiral shape and are distributed in a circular array on the surface of the ceramic matrix blocks (310). The heat dissipation disc strips (320) are electrically grounded to improve the heat dissipation effect and electromagnetic shielding performance.

6. A 35kV tubular busbar terminal with high thermal conductivity according to claim 1, characterized in that, The wire clamping strips (420) of the wiring component (400) are made of low-carbon steel wire material, and anti-slip patterns are provided on their surfaces to increase the clamping strength of the wire cable.

7. A 35kV tubular busbar terminal with high thermal conductivity according to claim 1, characterized in that, The heat dissipation end plates (230) are fixed on the outer periphery of the circulation channel (221). An insulating composite sleeve layer (211) is provided inside the heat conduction sleeve (210), and a conductive medium is filled inside the heat conduction sleeve (210); the circulation channels (221) are arranged in a staggered manner on the surface of the heat conduction sleeve (210) to achieve connection with the cross-flow channels (222) at both ends. A plurality of convex flow pipes (223) are evenly distributed at the staggered points of each circulation channel (221), and the convex flow pipes (223) are internally connected to the circulation channels (221).

8. A 35 kV tubular busbar terminal with high thermal conductivity according to claim 1, characterized in that, A split conductive element is provided inside the heat conduction sleeve (210) of the heat conduction component (200) and is in contact with the cable core through a conductive medium.

9. A 35kV tubular busbar terminal with high thermal conductivity according to claim 1, characterized in that, The heat dissipation disc strips (320) of the heat dissipation component (300) are made of aluminum alloy material and are anodized.

10. A 35 kV tubular busbar terminal with high thermal conductivity according to claim 1, characterized in that, The socket screw block (410) on the wiring component (400) is provided with a torque limiting structure.

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