Power transmission bus section bar

Abstract

The utility model relates to a power transmission bus profile which comprises a bus and a bus shell, the bus shell covers the outer surface of the bus, the opposite left and right sides of the bus are each provided with a plurality of first heat dissipation fins, the first heat dissipation fins abut against the inner side wall of the bus shell, and the opposite upper and lower inner side walls of the bus shell are each provided with a plurality of second heat dissipation fins. The first heat dissipation fins abut against the outer side wall of the bus, the second heat dissipation fins abut against the outer side wall of the bus, a heat dissipation assembly is arranged on the bus shell, natural flowing of air is replaced by a conduction path formed by the first heat dissipation fins, the second heat dissipation fins and the heat dissipation assembly, and the heat transfer efficiency can be effectively improved. The bus section bar has the effect of improving the heat dissipation performance of the bus section bar.

Description

Technical Field

[0001] The present application relates to the technical field of power busbars, and in particular to a power transmission busbar profile. Background Art

[0002] Transmission busbar profiles refer to special conductors used for convergence of power transmission lines and substation equipment at a certain voltage level in power stations, substations or distribution rooms. Busbar profiles usually include busbars and busbar shells. The busbars serve as conductors for transmitting current, and the busbar shells serve as protective shells for the busbars, providing physical protection for the busbars and ensuring good insulation performance between the busbars and between the busbars and the surrounding environment to prevent electrical accidents.

[0003] For the existing busbar profile structure, most of them are closed structures with the busbar shell covered on the outer surface of the busbar. The busbar generates heat during operation. As the working time increases, a large amount of heat is accumulated in the gap between the busbar shell and the busbar. The traditional busbar profile only conducts heat through the natural flow of air. The heat transfer efficiency is low and the heat cannot be dissipated to the outside in time. The accumulation of heat will cause the electrical conductivity of the busbar to drop significantly, which will have an adverse effect on the power system. At the same time, it will also accelerate the aging of the busbar shell and reduce the insulation performance of the busbar shell, which has obvious shortcomings. Utility Model Content

[0004] In order to improve the heat dissipation performance of a busbar profile, the present application provides a power transmission busbar profile.

[0005] The present application provides a transmission busbar profile adopting the following technical solution:

[0006] A power transmission busbar profile comprises a busbar and a busbar shell, wherein the busbar shell cover is arranged on the outer surface of the busbar, a plurality of first heat dissipation fins are arranged on the opposite left and right sides of the busbar, and the first heat dissipation fins abut against the inner wall of the busbar shell, a plurality of second heat dissipation fins are arranged on the opposite upper and lower inner walls of the busbar shell, and the plurality of second heat dissipation fins abut against the outer wall of the busbar, and a heat dissipation component is arranged on the busbar shell.

[0007] By adopting the above technical solution, the heat generated by the busbar during operation is transferred to the first heat dissipation fin and the second heat dissipation fin through the side wall of the busbar. Under the conduction of the first heat dissipation fin and the second heat dissipation fin, the heat is quickly transferred to the side wall of the busbar shell and dissipated to the outside through the heat dissipation component. The conduction path formed by the first heat dissipation fin and the second heat dissipation fin replaces the natural flow of air, which can effectively improve the heat transfer efficiency, improve the heat dissipation performance of the busbar profile, and avoid the adverse effects of heat accumulation on the busbar and the busbar shell.

[0008] Optionally, a heat dissipation cavity is provided on the circumferential side wall of the busbar shell, the heat dissipation assembly includes a phase change medium filled inside the heat dissipation cavity, a confluence cavity connected to the heat dissipation cavity is provided on the top wall of the busbar shell, and a plurality of grooves connected to the confluence cavity are provided on the top wall surface of the busbar shell, and a heat dissipation column is provided in each of the grooves.

[0009] By adopting the above technical solution, heat flows into the heat dissipation cavity after passing through the first heat dissipation fins and the second heat dissipation fins. The liquid phase change medium absorbs the heat and turns into phase change medium gas. The phase change medium gas flows upward into the confluence cavity. When the phase change medium gas contacts the heat dissipation column, the heat is transferred to the outside through the heat dissipation column. At this time, the temperature of the phase change medium gas decreases and turns from gas to liquid. The liquid phase change medium flows back into the heat dissipation cavity under the action of gravity. Compared with the heat dissipation method of air convection, the phase change medium can absorb heat more quickly. At the same time, the heat dissipation in the confluence cavity is further accelerated through the heat dissipation column. The setting of the heat dissipation component further improves the heat transfer efficiency and the heat dissipation effect of the heat dissipation profile is improved.

[0010] Optionally, a sliding groove is provided on the inner side wall opposite to each of the grooves, a guide rod is provided in the sliding groove, and a floating block is slidably connected to each of the guide rods. The two floating blocks are respectively provided at the opposite ends of the heat dissipation column. When the floating block moves to the end of the guide rod close to the second heat dissipation fin, the end face of the heat dissipation column is flush with the outer wall of the busbar shell.

[0011] By adopting the above technical solution, as the phase change medium absorbs more heat, the content of the phase change medium that undergoes phase change increases, and the air pressure in the confluence cavity gradually rises. At this time, the phase change medium gas will push the floating block in the sliding groove to slide upward along the length direction of the guide rod. The movement of the floating block drives the heat dissipation column to gradually extend out of the groove. The height of the heat dissipation column extending out of the busbar shell gradually increases, and the contact area between the heat dissipation column and the outside air increases, thereby further improving the heat dissipation effect of the heat dissipation column.

[0012] Optionally, the outer surface of the heat dissipation column is provided with a connecting ring, and a water cooling jacket is provided on the connecting ring. The water cooling jacket is mounted on the outer surface of the heat dissipation column, and the water cooling jacket is fixedly connected to the connecting ring by connecting bolts. The inner side wall of the water cooling jacket and the outer surface of the heat dissipation column form a water storage cavity.

[0013] By adopting the above technical solution, when the heat is transferred to the inside of the heat dissipation column, the water in the water storage chamber can absorb the heat of the heat dissipation column, the water temperature in the water storage chamber rises, and the temperature of the heat dissipation column decreases, thereby realizing water-cooling heat dissipation of the heat dissipation column. At the same time, when the heat dissipation column moves upward, the movement of the heat dissipation column drives the water in the water storage chamber to flow. During the flow of water, the temperature distribution of the water in the water storage chamber can be more uniform, thereby reducing the possibility of a decrease in heat absorption effect due to local hot spots in the water in the water storage chamber, thereby further improving the heat dissipation effect of the water cooling jacket.

[0014] Optionally, an annular groove is provided on the bottom surface of the water cooling jacket, a sealing ring is provided in the annular groove, and two opposite end surfaces of the sealing ring respectively abut against the inner side wall of the annular groove and the surface of the connecting ring.

[0015] By adopting the above technical solution, the setting of the sealing ring ensures the sealing between the water cooling jacket and the connecting ring, preventing the water in the water storage chamber from flowing into the confluence chamber through the gap between the water cooling jacket and the connecting ring, thereby ensuring the normal operation of the heat dissipation function of the phase change medium, and at the same time avoiding water leakage and damage to the busbar and surrounding equipment, thereby improving the reliability and safety of the busbar profile operation.

[0016] Optionally, a spirally distributed baffle is provided inside the water storage chamber, and two sides of the baffle are respectively connected to the heat dissipation column or the water cooling jacket to form a spiral water channel.

[0017] By adopting the above technical solution, the setting of the spiral water channel can extend the flow path and residence time of water in the water storage chamber, increase the contact area and heat exchange time between water and the heat dissipation column, improve the effect of water cooling and make the heat dissipation more uniform and efficient.

[0018] Optionally, outer surfaces on two opposite sides of the busbar housing are provided with heat insulation layers, and the heat insulation layers are made of nano aerogel material.

[0019] By adopting the above technical solution, the thermal insulation layer made of nano-aerogel can effectively block the transfer of external heat to the interior of the busbar shell, reducing the possibility of external heat entering the interior of the busbar profile and causing the heat dissipation effect of the heat dissipation component to decrease, thereby enabling the heat dissipation component to more effectively process the heat generated by the busbar profile itself and maintain heat dissipation balance.

[0020] Optionally, the inner wall of the heat dissipation cavity is coated with a polytetrafluoroethylene coating.

[0021] By adopting the above technical solution, when the phase change medium flows in the heat dissipation cavity, friction resistance will be generated with the inner wall of the heat dissipation cavity. The polytetrafluoroethylene coating has the characteristics of a low friction coefficient, which can reduce the resistance of the phase change medium during flow, allowing the phase change medium to flow and distribute more quickly, thereby improving heat transfer efficiency.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. This application provides first and second heat sink fins and a heat sink assembly. The conductive path formed by the first and second heat sink fins and the heat sink assembly replaces the natural flow of air, effectively improving the heat transfer efficiency. This improves the heat dissipation performance of the busbar profile and avoids the adverse effects of heat accumulation on the busbar and busbar housing.

[0024] 2. This application provides a heat dissipation column that can be extended and retracted along the sliding groove. As the phase change medium absorbs more heat, the height of the heat dissipation column extending from the busbar housing gradually increases, and the contact area between the heat dissipation column and the outside air increases, thereby further improving the heat dissipation effect of the heat dissipation column.

[0025] 3. The present application sets up a water cooling jacket. When the heat is transferred to the inside of the heat dissipation column, the water in the water storage chamber can absorb the heat of the heat dissipation column, the water temperature in the water storage chamber rises, and the temperature of the heat dissipation column decreases, thereby realizing water cooling of the heat dissipation column. At the same time, when the heat dissipation column moves upward, the movement of the heat dissipation column drives the water in the water storage chamber to flow. During the flow of water, the temperature distribution of the water in the water storage chamber can be more uniform, thereby reducing the possibility of a decrease in heat absorption effect due to local hot spots in the water in the water storage chamber, thereby further improving the heat dissipation effect of the water cooling jacket. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of this application.

[0027] Figure 2 It is a cross-sectional view of the heat dissipation cavity in the embodiment of the present application.

[0028] Figure 3 It is a cross-sectional view of the heat dissipation column and the water cooling jacket in the embodiment of the present application.

[0029] Explanation of the accompanying drawings: 1. busbar; 2. busbar shell; 3. first heat sink fin; 4. second heat sink fin; 5. heat sink assembly; 6. heat sink cavity; 51. phase change medium; 7. confluence cavity; 8. groove; 52. heat sink column; 81. sliding groove; 82. guide rod; 83. floating block; 521. connecting ring; 522. connecting bolt; 9. water cooling jacket; 10. water storage cavity; 11. baffle; 91. annular groove; 92. sealing ring; 12. thermal insulation layer. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-3 This application is described in further detail.

[0031] The embodiment of the present application discloses a power transmission busbar profile.

[0032] Reference Figure 1and Figure 2 A power transmission busbar profile includes a busbar 1 and a busbar shell 2, the busbar shell 2 is covered on the outer surface of the busbar 1, and the left and right side walls opposite to each other are fixedly connected with a plurality of first heat dissipation fins 3. In this embodiment, the number of first heat dissipation fins 3 on a single side of the busbar 1 is six, and the end of the first heat dissipation fin 3 away from the busbar 1 abuts on the inner wall of the busbar shell 2, and the upper and lower inner walls opposite to the busbar shell 2 are fixedly connected with a plurality of second heat dissipation fins 4. In this embodiment, the number of second heat dissipation fins 4 on a single side of the busbar shell 2 is six, and the end of the second heat dissipation fin 4 away from the busbar shell 2 abuts on the outer surface of the busbar 1. The length directions of the first heat dissipation fins 3 and the second heat dissipation fins 4 are parallel to the length direction of the busbar 1, and a heat dissipation component 5 is provided on the busbar shell 2.

[0033] Reference Figure 1 and Figure 2 A heat dissipation cavity 6 is defined within the circumferential sidewall of the busbar housing 2. The heat dissipation assembly 5 includes a phase change medium 51 filled within the heat dissipation cavity 6. The inner wall of the heat dissipation cavity 6 is coated with a polytetrafluoroethylene coating. When the phase change medium 51 flows within the heat dissipation cavity 6, frictional resistance is generated between the phase change medium 51 and the inner wall of the heat dissipation cavity 6. The polytetrafluoroethylene coating has the characteristic of a low friction coefficient, which can reduce the resistance of the phase change medium 51 during flow, allowing the phase change medium 51 to flow and distribute more quickly, thereby improving heat transfer efficiency.

[0034] Reference Figure 1 and Figure 2 The phase change medium 51 is a liquid that does not react with the material of the busbar housing 2 and is easily evaporated, including but not limited to acetone and fluorinated liquid. A confluence cavity 7 connected to the heat dissipation cavity 6 is provided on the inner top wall of the busbar housing 2, and a plurality of grooves 8 connected to the confluence cavity 7 are provided on the outer top wall of the busbar housing 2. A heat dissipation column 52 is provided in each groove 8. In this embodiment, the first heat dissipation fins 3, the second heat dissipation fins 4 and the heat dissipation column 52 are all made of metal copper with a high thermal conductivity.

[0035] When the power transmission busbar profile is working, the busbar 1 will generate heat due to the passage of current. Since the busbar 1 is connected to the inner wall of the busbar shell 2 through the first heat dissipation fins 3 and the second heat dissipation fins 4 on all sides, and the first heat dissipation fins 3 and the second heat dissipation fins 4 are both made of metal copper with a high thermal conductivity, when the heat is transferred to the side wall of the busbar 1, the first heat dissipation fins 3 and the second heat dissipation fins 4 quickly transfer the heat to the inner wall of the busbar shell 2. The heat dissipation cavity 6 in the side wall around the busbar shell 2 is filled with a phase change medium 51. As the heat is transferred, the liquid phase change medium 51 absorbs the heat and turns into a phase change medium 51 gas. The phase change medium The gas 51 flows upward into the confluence cavity 7. When the phase change medium 51 gas contacts the heat dissipation column 52, the heat is transferred to the outside through the heat dissipation column 52. At this time, the temperature of the phase change medium 51 gas decreases and changes from gas to liquid. The liquid phase change medium 51 flows back into the heat dissipation cavity 6 under the action of gravity to prepare to absorb heat. The conduction path formed by the first heat dissipation fins 3, the second heat dissipation fins 4 and the heat dissipation component 5 replaces the natural flow of air, which can effectively improve the heat transfer efficiency, thereby improving the heat dissipation performance of the busbar profile and avoiding the adverse effects of heat accumulation on the busbar 1 and the busbar shell 2.

[0036] Reference Figure 1 and Figure 2 A sliding groove 81 is provided on the inner side wall opposite to each groove 8, and a guide rod 82 is fixedly connected to each sliding groove 81. A floating block 83 is slidably connected to each guide rod 82. The two floating blocks 83 are respectively fixedly connected to the opposite end side walls of the heat dissipation column 52. When the floating block 83 moves to the end of the guide rod 82 close to the second heat dissipation fin 4, the end face of the heat dissipation column 52 is flush with the outer wall of the busbar shell 2.

[0037] As the phase change medium 51 absorbs more heat, the content of the phase change medium 51 that undergoes phase change increases, and the air pressure in the confluence chamber 7 gradually rises. At this time, the gas of the phase change medium 51 will push the floating block 83 in the sliding groove 81 to slide upward along the length direction of the guide rod 82. The movement of the floating block 83 drives the heat dissipation column 52 to gradually extend out of the groove 8. The height of the heat dissipation column 52 extending out of the busbar shell 2 gradually increases, and the contact area between the heat dissipation column 52 and the outside air increases, thereby further improving the heat dissipation effect of the heat dissipation column 52. When the gas of the phase change medium 51 turns into liquid and flows back into the heat dissipation chamber 6, the air pressure in the confluence chamber 7 gradually decreases. At this time, the heat dissipation column 52 pushes the floating block 83 downward under the action of gravity, and the end face of the floating block 83 again abuts against the end face of the sliding groove 81 near the second heat dissipation fin 4.

[0038] Reference Figure 2 and Figure 3In order to further improve the heat dissipation effect of the heat dissipation column 52, a connecting ring 521 is provided on the outer surface of the heat dissipation column 52. The water cooling jacket 9 is detachably connected to the connecting ring 521 through a connecting bolt 522. The water cooling jacket 9 is sleeved on the outer surface of the heat dissipation column 52. The outer surface of the water cooling jacket 9 is tightly attached to the inner wall of the groove 8. The inner wall of the water cooling jacket 9 and the outer surface of the heat dissipation cavity 6 form a water storage cavity 10. Cooling water flows inside the water storage cavity 10. A spirally distributed baffle 11 is provided inside the water storage cavity 10. The two sides of the baffle 11 are respectively fixedly connected to the heat dissipation column 52 or the water cooling jacket 9 to form a spiral water channel.

[0039] When the heat is transferred to the inside of the heat dissipation column 52, the water in the water storage chamber 10 can absorb the heat of the heat dissipation column 52, the water temperature in the water storage chamber 10 rises, and the temperature of the heat dissipation column 52 decreases, thereby realizing water-cooling heat dissipation of the heat dissipation column 52. At the same time, when the heat dissipation column 52 moves upward, the movement of the heat dissipation column 52 drives the water in the water storage chamber 10 to flow along the spiral water channel. During the flow of water, the temperature distribution of the water in the water storage chamber 10 can be made more uniform, reducing the possibility of a decrease in the heat absorption effect due to local hot spots generated by the water in the water storage chamber 10, and at the same time increasing the contact area and heat exchange time between the water and the heat dissipation column 52, further improving the heat dissipation effect of the water cooling jacket 9.

[0040] Reference Figure 2 and Figure 3 An annular groove 91 is provided on the bottom surface of the water-cooling jacket 9, and a sealing ring 92 is provided inside the annular groove 91. The two opposite end faces of the sealing ring 92 are respectively in contact with the inner wall of the annular groove 91 and the surface of the connecting ring 521. The setting of the sealing ring 92 ensures the sealing between the water-cooling jacket 9 and the connecting ring 521, and prevents the water in the water storage chamber 10 from flowing into the confluence chamber 7 through the gap between the water-cooling jacket 9 and the connecting ring 521, thereby ensuring the normal operation of the heat dissipation function of the phase change medium 51, and at the same time avoiding water leakage and damage to the busbar 1 and surrounding equipment, thereby improving the reliability and safety of the busbar profile operation.

[0041] Reference Figure 2 and Figure 3 In some specific environments, there may be external high-temperature sources, such as near high-temperature equipment or in hot climates. If a large amount of external heat enters the busbar housing 2, it will interfere with the normal heat dissipation of the heat dissipation component 5, increase the heat dissipation burden, and reduce the heat dissipation effect of the heat dissipation component 5.

[0042] In order to solve this problem, the outer surfaces of the opposite sides of the busbar shell 2 are fixedly connected with an insulation layer 12, and the insulation layer 12 is made of nano aerogel material. The insulation layer 12 made of nano aerogel can effectively block the external heat from being transferred to the inside of the busbar shell 2, so that the heat dissipation component 5 can more effectively process the heat generated by the busbar profile itself and maintain the heat dissipation balance.

[0043] The implementation principle of a power transmission busbar profile in an embodiment of the present application is as follows: when the power transmission busbar profile is working, the busbar 1 will generate heat due to the passage of current. Since the busbar 1 is connected to the inner wall of the busbar shell 2 through the first heat dissipation fins 3 and the second heat dissipation fins 4 on all sides, the first heat dissipation fins 3 and the second heat dissipation fins 4 are both made of metal copper with a high thermal conductivity coefficient. When the heat is transferred to the side wall of the busbar 1, the first heat dissipation fins 3 and the second heat dissipation fins 4 quickly transfer the heat to the inner wall of the busbar shell 2. The heat dissipation cavity 6 in the side wall around the busbar shell 2 is filled with a phase change medium 51. As the heat is transferred, the liquid phase change medium 51 absorbs the heat and turns into a phase change medium. The medium 51 gas, the phase change medium 51 gas flows upward into the confluence cavity 7. When the phase change medium 51 gas contacts the heat dissipation column 52, the heat is transferred to the outside through the heat dissipation column 52. At this time, the temperature of the phase change medium 51 gas decreases and changes from gas to liquid. The liquid phase change medium 51 flows back into the heat dissipation cavity 6 under the action of gravity to prepare to absorb heat. The conduction path formed by the first heat dissipation fins 3, the second heat dissipation fins 4 and the heat dissipation component 5 replaces the natural flow of air, which can effectively improve the heat transfer efficiency, thereby improving the heat dissipation performance of the busbar profile and avoiding the adverse effects of heat accumulation on the busbar 1 and the busbar shell 2.

[0044] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A power transmission busbar profile, comprising a busbar (1) and a busbar shell (2), wherein the busbar shell (2) is arranged on the outer surface of the busbar (1), characterized in that: A plurality of first heat dissipation fins (3) are provided on the opposite left and right sides of the busbar (1), the first heat dissipation fins (3) abutting against the inner wall of the busbar shell (2), a plurality of second heat dissipation fins (4) are provided on the opposite upper and lower inner walls of the busbar shell (2), the plurality of second heat dissipation fins (4) abutting against the outer wall of the busbar (1), and a heat dissipation assembly (5) is provided on the busbar shell (2).

2. A power transmission busbar profile according to claim 1, characterized in that: A heat dissipation cavity (6) is provided on the circumferential side wall of the busbar housing (2); the heat dissipation assembly (5) includes a phase change medium (51) filled in the heat dissipation cavity (6); a confluence cavity (7) communicating with the heat dissipation cavity (6) is provided on the inner top wall of the busbar housing (2); a plurality of grooves (8) communicating with the confluence cavity (7) are provided on the top wall surface of the busbar housing (2); and a heat dissipation column (52) is provided in each of the grooves (8).

3. A power transmission busbar profile according to claim 2, characterized in that: A sliding groove (81) is provided on the inner side wall opposite to each groove (8), a guide rod (82) is provided in the sliding groove (81), and a floating block (83) is slidably connected to each guide rod (82). The two floating blocks (83) are respectively provided at the opposite ends of the heat dissipation column (52). When the floating block (83) moves to one end of the guide rod (82) close to the second heat dissipation fin (4), the end face of the heat dissipation column (52) is flush with the outer side wall of the busbar shell (2).

4. A power transmission busbar profile according to claim 3, characterized in that: The outer surface of the heat dissipation column (52) is provided with a connecting ring (521), and a water cooling jacket (9) is provided on the connecting ring (521). The water cooling jacket (9) is sleeved on the outer surface of the heat dissipation column (52), and the water cooling jacket (9) is fixedly connected to the connecting ring (521) via connecting bolts (522). The inner side wall of the water cooling jacket (9) and the outer surface of the heat dissipation column (52) form a water storage cavity (10).

5. A power transmission busbar profile according to claim 4, characterized in that: An annular groove (91) is provided on the bottom surface of the water cooling jacket (9), a sealing ring (92) is provided in the annular groove (91), and two opposite end surfaces of the sealing ring (92) respectively abut against the inner side wall of the annular groove (91) and the surface of the connecting ring (521).

6. The power transmission busbar profile according to claim 4, characterized in that: A spirally distributed baffle (11) is provided inside the water storage chamber (10), and both sides of the baffle (11) are respectively connected to the heat dissipation column (52) or the water cooling jacket (9) to form a spiral water channel.

7. The power transmission busbar profile according to claim 1, characterized in that: The outer surfaces of the two opposite sides of the busbar shell (2) are both provided with a heat insulation layer (12), and the heat insulation layer (12) is made of nano aerogel material.

8. The power transmission busbar profile according to claim 2, characterized in that: The inner side wall of the heat dissipation cavity (6) is coated with a polytetrafluoroethylene coating.

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