Bus conductor assembly and gas insulated bus

Abstract

The invention relates to totally-enclosed installation of a bus, in particular to a bus conductor assembly and a gas insulated bus. The gas insulated bus comprises a bus conductor assembly, the bus conductor assembly comprises a copper bar, a radiator is installed close to the copper bar, and the radiator comprises a radiator substrate which is attached to the copper bar and extends in the length direction of the copper bar and rib-shaped radiating fins arranged on the two opposite sides of the radiator substrate. The rib-shaped cooling fins are located on the two sides of the copper bar in the width direction so that the radiator substrate and the rib-shaped cooling fins can form a fishbone shape together, the radiator substrate is fixedly connected with the copper bar, a heat dissipation gap is formed between the outer end of each rib-shaped cooling fin and the copper bar, insulating gas can make contact with the copper bar through the gaps, heat generated by the copper bar is taken away, and the heat dissipation efficiency is improved. In other words, the radiator can retain convection heat dissipation and thermal radiation heat dissipation on the basis of achieving heat dissipation of the copper bars in a heat conduction mode, so that heat dissipation efficiency can be improved, deformation caused by temperature changes is reduced, and insulation protection is facilitated.

Description

Technical Field

[0001] The invention relates to a fully enclosed installation of a busbar, and in particular to a busbar conductor assembly and a gas-insulated busbar. Background Art

[0002] Gas insulated busbar is a high-voltage, high-current power transmission equipment with a coaxial casing and conductor. It is widely used in power systems because of its large transmission capacity, small footprint, low transmission loss and long service life. It is one of the key equipment in the power transmission and distribution link of the power system and undertakes the important task of electric energy transmission.

[0003] For example, a utility model patent with the authorization announcement number CN201450297U and the authorization announcement date May 5, 2010 discloses a gas-insulated busbar structure, including a busbar shell connected by a flange, the busbar shell gas chamber division parts are connected by a basin-type insulator, the two ends of the busbar shell adopt a conical structure, the diameter of the middle part is smaller than the diameter of the two ends, and the unequal diameter structure gas-insulated busbar can reduce the electric field at the connection part, and the coaxial electric field in the middle part is relatively uniform, which can save the consumption of raw materials and insulating gas of the busbar shell. The gas-insulated busbar disclosed by the utility model has a small conductor heat dissipation area, which is not conducive to heat dissipation when large current flows; at the same time, the connection between the busbar shell gas chambers adopts a basin-type insulator, and the axial deviation of the two gas chambers cannot be adjusted during on-site installation, which has high requirements for on-site cabinet installation of switchgear. Improper installation will have the risk of gas leakage, thereby reducing the insulation performance of the gas-insulated busbar structure.

[0004] Another example is a gas-insulated busbar structure disclosed in a utility model patent with authorization announcement number CN204156398U and authorization announcement date of February 11, 2024, which includes two air chambers, two shells and insulators. The shells are fixed on the tops of the corresponding air chambers, and the two shells are connected by bellows, and sealing plates are fixed on their tops respectively. There are two insulators, and their lower parts are respectively arranged in the two air chambers, and their upper parts are respectively arranged in the two shells. Their tops are connected by a busbar, and the busbar conductor adopts exposed copper busbar. The utility model uses bellows to connect the air chambers. Although the bellows can adjust the axial deviation between the two air chambers along the busbar direction, the price is high, and this connection method is relatively costly; and the conductor adopts exposed copper busbar, which is long and has uneven electric field distribution around the copper busbar, which affects the insulation performance of the gas-insulated busbar; at the same time, the heat dissipation area is small, and when a large current flows, it cannot dissipate heat in time and fully, and it is easy to deform, which affects the insulation performance of the gas-insulated busbar. Summary of the invention

[0005] The object of the present invention is to provide a busbar conductor assembly to solve the problem that the current copper busbar has poor heat dissipation performance and affects the overall insulation effect.

[0006] At the same time, the present invention also provides a gas insulated busbar to solve the above problems.

[0007] In order to solve the above problems, the busbar conductor assembly of the present invention adopts the following technical solutions:

[0008] A busbar conductor assembly comprises a copper bar, a heat sink is installed closely against the copper bar, the heat sink comprises a heat sink substrate which is in contact with the copper bar and extends along the length direction of the copper bar, and rib-shaped heat sinks are arranged on opposite sides of the heat sink substrate, the rib-shaped heat sinks are located on both sides of the copper bar in the width direction so that the heat sink substrate and the rib-shaped heat sinks together form a fishbone shape, the heat sink substrate is fixedly connected to the copper bar, and a heat dissipation gap is arranged between the outer ends of the rib-shaped heat sinks and the copper bar.

[0009] Furthermore, two rib-shaped heat sinks corresponding to each other in the width direction of the copper bar are connected to a side of the heat sink substrate facing away from the copper bar, and form a semicircular outer contour.

[0010] Furthermore, the width of the heat sink substrate is smaller than the width of the copper busbar.

[0011] Furthermore, the rib-shaped heat sink portions located at both the left and right sides of the heat sink substrate and above the copper bar are spaced apart from one side of the copper bar close to the heat sink substrate.

[0012] Furthermore, the inner contour of the rib-shaped heat sink in the width direction of the copper bar is L-shaped.

[0013] Furthermore, a threaded hole is provided on one side of the heat sink substrate close to the copper busbar, and a corresponding bolt hole is provided on the copper busbar. The heat sink substrate is fixed to each other by screws provided in the bolt hole and the threaded hole.

[0014] Furthermore, the busbar conductor assembly also includes an air chamber connecting conductor arranged at at least one end thereof, the air chamber connecting conductor includes a connecting sleeve for coaxial connection with the air chamber outlet bushing and a connecting wing plate extending radially outward from the connecting sleeve, and the copper busbar is connected to the connecting wing plate.

[0015] Furthermore, the copper bars are connected to both sides of the connecting wing plate respectively, and the outer contours of the rib-shaped heat sinks of the radiator on the two copper bars are assembled into a circle.

[0016] Beneficial effects: The present invention is an improved invention. The busbar conductor assembly of the present invention includes a copper bar, and a heat sink is installed close to the copper bar to improve the heat dissipation efficiency. The heat sink includes a heat sink substrate that fits the copper bar and extends along the length direction of the copper bar, and rib-shaped heat sinks arranged on opposite sides of the heat sink substrate. The rib-shaped heat sinks are located on both sides of the width direction of the copper bar so that the heat sink substrate and the rib-shaped heat sink together form a fishbone shape. The heat sink substrate is fixedly connected to the copper bar, and a heat dissipation gap is arranged between the outer end of the rib-shaped heat sink and the copper bar. The insulating gas can contact the copper bar through the gap and take away the heat generated by the copper bar. That is, the heat sink can retain its convection heat dissipation and heat radiation heat dissipation on the basis of realizing the heat dissipation of the copper bar in the form of heat conduction, thereby improving the heat dissipation efficiency, reducing the deformation caused by temperature changes, and facilitating insulation protection.

[0017] The gas insulated busbar of the present invention adopts the following technical solutions:

[0018] A gas insulated busbar comprises a busbar conductor assembly and a barrel assembly. The busbar conductor assembly comprises a copper bar, a heat sink is installed closely against the copper bar, the heat sink comprises a heat sink substrate which is in contact with the copper bar and extends along the length direction of the copper bar, and rib-shaped heat sinks are arranged on opposite sides of the heat sink substrate. The rib-shaped heat sinks are located on both sides of the copper bar in the width direction so that the heat sink substrate and the rib-shaped heat sinks together form a fishbone shape. The heat sink substrate is fixedly connected to the copper bar, and a heat dissipation gap is arranged between the outer ends of the rib-shaped heat sinks and the copper bar.

[0019] Furthermore, two rib-shaped heat sinks corresponding to each other in the width direction of the copper bar are connected to a side of the heat sink substrate facing away from the copper bar, and form a semicircular outer contour.

[0020] Furthermore, the width of the heat sink substrate is smaller than the width of the copper busbar.

[0021] Furthermore, the rib-shaped heat sink portions located at both the left and right sides of the heat sink substrate and above the copper bar are spaced apart from one side of the copper bar close to the heat sink substrate.

[0022] Furthermore, the inner contour of the rib-shaped heat sink in the width direction of the copper bar is L-shaped.

[0023] Furthermore, a threaded hole is provided on one side of the heat sink substrate close to the copper busbar, and a corresponding bolt hole is provided on the copper busbar. The heat sink substrate is fixed to each other by screws provided in the bolt hole and the threaded hole.

[0024] Furthermore, the busbar conductor assembly also includes an air chamber connecting conductor arranged at at least one end thereof, the air chamber connecting conductor includes a connecting sleeve for coaxial connection with the air chamber outlet bushing and a connecting wing plate extending radially outward from the connecting sleeve, and the copper busbar is connected to the connecting wing plate.

[0025] Furthermore, the copper bars are connected to both sides of the connecting wing plate respectively, and the outer contours of the rib-shaped heat sinks of the radiator on the two copper bars are assembled into a circle.

[0026] Furthermore, the cylinder assembly includes two metal cylinders and a telescopic cylinder connected between the two metal cylinders, the telescopic cylinder is a rubber cylinder, and a lantern-shaped section is provided between the two ends of the rubber cylinder.

[0027] Beneficial effects: The present invention is an improved invention. The gas-insulated busbar of the present invention includes a busbar conductor assembly, the busbar conductor assembly includes a copper bar, a heat sink is installed close to the copper bar to improve the heat dissipation efficiency, the heat sink includes a heat sink substrate that fits the copper bar and extends along the length direction of the copper bar, and rib-shaped heat sinks are arranged on opposite sides of the heat sink substrate, the rib-shaped heat sinks are located on both sides of the width direction of the copper bar so that the heat sink substrate and the rib-shaped heat sink together form a fishbone shape, the heat sink substrate is fixedly connected to the copper bar, and a heat dissipation gap is arranged between the outer end of the rib-shaped heat sink and the copper bar, and the insulating gas can contact the copper bar through the gap to take away the heat generated by the copper bar, that is, the heat sink can retain its convection heat dissipation and heat radiation heat dissipation on the basis of realizing the heat dissipation of the copper bar in the form of heat conduction, thereby improving the heat dissipation efficiency, reducing the deformation caused by temperature changes, and facilitating insulation protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic structural diagram of an embodiment of a gas-insulated busbar according to the present invention;

[0029] Figure 2 for Figure 1 A schematic diagram of a partially enlarged structure of Example A;

[0030] Figure 3 for Figure 2 HH profile of;

[0031] Figure 4 for Figure 1 A schematic diagram of the partially enlarged structure of Example B.

[0032] In the figure: 1. first switch cabinet; 2. second switch cabinet; 3. left metal cylinder; 4. right metal cylinder; 5. telescopic cylinder; 6. air chamber outlet bushing; 7. air chamber connecting conductor; 8. radiator; 9. copper busbar; 10. connecting wing plate; 11. elastic sealing member; 12. radiator base plate; 13. telescopic cylinder flange; 14. ribbed heat sink; 16. left metal cylinder flange; 17. right metal cylinder flange. DETAILED DESCRIPTION

[0033] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0034] The structural form of the busbar conductor assembly plays a vital role in insulation performance, current carrying and heat dissipation performance, and assembly processability. The concept of the present invention is to improve the insulation performance, heat dissipation performance, and assembly processability of the gas insulated busbar by optimizing the shape and structure of the busbar conductor assembly.

[0035] Based on the above invention concept, Figure 2 , 3 In a basic embodiment, the busbar conductor assembly of the present invention includes a copper bar 9, and a heat sink 8 is installed close to the copper bar 9 to improve the heat dissipation efficiency. The heat sink 8 includes a heat sink substrate 12 that is in contact with the copper bar 9 and extends along the length direction of the copper bar 9, and rib-shaped heat sinks 14 arranged on opposite sides of the heat sink substrate 12. The rib-shaped heat sink 14 is a high-quality heat dissipation structure with a small footprint, a large contact area with the gas, and a high heat dissipation efficiency. The rib-shaped heat sink 14 is located on both sides of the copper bar 9 in the width direction so that the heat sink substrate 12 and the rib-shaped heat sink 14 together form a fishbone shape. The heat sink substrate 12 is fixedly connected to the copper bar 9. A heat dissipation gap is set between the outer end of the rib-shaped heat sink 14 and the copper bar 9. The insulating gas can contact the copper bar through the gap to take away the heat generated by the copper bar, improve the heat dissipation efficiency, reduce the deformation caused by temperature changes, and facilitate insulation protection.

[0036] like Figure 1 In a preferred embodiment, two rib-shaped heat sinks 14 corresponding to the width direction of the copper bar 9 are connected to the side of the radiator substrate 12 facing away from the copper bar 9, and form a semicircular outer contour, which improves the stability of the structure and prevents bending and damage during transportation and installation. In the manufacturing process, one-piece molding is adopted to reduce the production process and reduce production costs; at the same time, during installation, the installation workload is reduced and the assembly process is improved; and when in use, the two components are spliced ​​together to obtain a conductor structure with a circular outer contour, which helps to maintain a uniform electric field. In other embodiments, the rib-shaped heat sinks 14 can also maintain gaps between each other to achieve similar working effects, but the structural strength is insufficient and it is easy to be damaged.

[0037] In a preferred embodiment, the width of the radiator substrate 12 of the present invention is less than the width of the copper bar 9. Under the premise of ensuring the heat dissipation performance, the production cost can be reduced, the gap of the radiator 8 is enlarged, the contact area between the gas and the copper bar 9 is increased, and the heat dissipation efficiency can be improved. In other embodiments, the width of the radiator substrate 12 can also be greater than or equal to the width of the copper bar 9, but it will increase the production cost and cause material waste. The rib-shaped heat sink 14 is located on the left and right sides of the radiator substrate 12 and the part above the copper bar 9 is spaced from the side of the copper bar close to the radiator substrate 12 to ensure the spacing between the rib-shaped heat sink 14 and the copper bar 9, increase the contact area between the copper bar 9 and the gas, improve the heat dissipation efficiency, and prevent the rib-shaped heat sink 14 from bending and deforming, and the copper bar 9 is difficult to disassemble during maintenance and replacement. The inner contour of the rib-shaped heat sink 14 of the present invention in the width direction of the copper bar 9 is L-shaped, which corresponds to the outer contour of the copper bar 9, ensuring the gap between the copper bar 9 and the rib-shaped heat sink 14. In other embodiments, the inner contour is other shapes, which can also achieve the same effect, but the assembly process is poor.

[0038] like Figure 4 In a preferred embodiment, a threaded hole is provided on one side of the heat sink substrate 12 close to the copper bar 9. The screw hole is opened on the side close to the copper bar 9. When the two components are assembled, the screw is wrapped inside to prevent the screw from affecting the uniformity of the electric field. The copper bar 9 is provided with a corresponding bolt hole. The heat sink substrate 12 is fixed to each other by screws provided in the bolt hole and the threaded hole. The copper bar 9 and the heat sink substrate 12 are fixed by screws, which facilitates on-site installation and ensures the stability of the connection between the two. At the same time, the maintenance cost is reduced, and no additional non-standard spare parts are required, which reduces the difficulty of maintenance. In other embodiments, direct connection can also be achieved by welding, but the subsequent maintenance cost is high.

[0039] In a preferred embodiment, the busbar conductor assembly also includes an air chamber connecting conductor 7 arranged at at least one end thereof, the air chamber connecting conductor 7 includes a connecting sleeve for coaxial connection with the air chamber outlet sleeve 6 and a connecting wing plate 10 extending radially outward from the connecting sleeve, the copper busbar 9 is connected to the connecting wing plate 10, the air chamber connecting conductor 7 ensures the reliability of the conductive connection between the air chamber and the busbar, the copper busbars 9 are respectively connected to the two sides of the connecting wing plate 10, and mounting holes are opened on the radiator 8 at positions corresponding to the connection points to facilitate the connection between the connecting wing plate 10 and the copper busbar 9. The outer contours of the rib-shaped heat sinks 14 of the radiator on the two copper busbars 9 are assembled into a circle. Because the rib-shaped heat sinks 14 are also conductors, the circular outer contour of the rib-shaped heat sinks 14 makes the peripheral electric field more uniform than the exposed copper busbar, which is beneficial to the insulation protection of the busbar and reduces the possibility of breakdown of the insulation layer due to uneven electric field.

[0040] The specific implementation scheme of the gas insulated busbar of the present invention is:

[0041] The gas insulated busbar of the present invention comprises a busbar conductor assembly, and the implementation of the busbar conductor assembly is as described above and will not be described in detail.

[0042] like Figure 1 , 4 In a preferred embodiment, the cylinder assembly of the present invention comprises two metal cylinders and a telescopic cylinder 5 connected between the two metal cylinders, wherein the metal cylinder is as follows Figure 1 The figure shows a left metal cylinder 3 and a right metal cylinder 4, wherein the telescopic cylinder 5 is a rubber cylinder, and a lantern-shaped section is provided between the two ends of the telescopic cylinder 5. The lantern shape has a certain elasticity so that it can be axially retracted and retracted, and it is easy to adjust the installation error of the gas-insulated busbar along the copper bar direction, thereby reducing the difficulty of installing the gas-insulated busbar. At the same time, compared with the corrugated tube, the telescopic cylinder can achieve lower cost by using elastic materials such as rubber.

[0043] In a preferred embodiment, the telescopic cylinder 5 is connected to the left metal cylinder 3 and the right metal cylinder 4 through flanges, and an elastic seal 11 is provided between the telescopic cylinder 5 and the connecting flanges of the left and right metal cylinders. When the bolts on the fastening flanges are pressed and deformed, the elastic seal 11 is ensured to be airtight. In other embodiments, the telescopic cylinder and the left and right metal cylinders can also be connected using a rubber sleeve and a clamping ring structure.

[0044] In a preferred embodiment, the gas insulated bus includes an insulating tube body, the bus conductor assembly is installed in the insulating tube body, and a mounting hole for connecting the two bus conductor assemblies is provided on the tube wall at the position where the two bus conductor assemblies are connected, so as to facilitate on-site installation and maintenance. In other embodiments, the installation can also be completed without providing the mounting hole, but the on-site installation is difficult and the installation effect cannot be guaranteed.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A busbar conductor assembly, comprising a copper bar, characterized in that: A heat sink is installed close to the copper bar, and the heat sink includes a heat sink substrate that is in contact with the copper bar and extends along the length direction of the copper bar, and rib-shaped heat sinks are arranged on opposite sides of the heat sink substrate. The rib-shaped heat sinks are located on both sides of the copper bar in the width direction so that the heat sink substrate and the rib-shaped heat sinks together form a fishbone shape. The heat sink substrate is fixedly connected to the copper bar, and a heat dissipation gap is arranged between the outer ends of the rib-shaped heat sinks and the copper bar.

2. The busbar conductor assembly according to claim 1, characterized in that: Two rib-shaped heat sinks corresponding to each other in the width direction of the copper bar are connected to a side of the heat sink substrate facing away from the copper bar and form a semicircular outer contour.

3. The busbar conductor assembly according to claim 1 or 2, characterized in that: The width of the heat sink substrate is smaller than the width of the copper busbar.

4. The busbar conductor assembly according to claim 3, characterized in that: The rib-shaped heat sink is located at both the left and right sides of the heat sink substrate and the portion above the copper bar, and is spaced from one side of the copper bar close to the heat sink substrate.

5. The busbar conductor assembly according to claim 4, characterized in that: The inner contour of the rib-shaped heat sink in the width direction of the copper bar is L-shaped.

6. The busbar conductor assembly according to claim 1 or 2, characterized in that: A threaded hole is arranged on one side of the heat sink substrate close to the copper busbar, and a corresponding bolt hole is arranged on the copper busbar. The heat sink substrate is fixedly matched with each other by screws arranged in the bolt hole and the threaded hole.

7. The busbar conductor assembly according to claim 2, characterized in that: The busbar conductor assembly also includes an air chamber connecting conductor arranged at at least one end thereof, the air chamber connecting conductor including a connecting sleeve for coaxial connection with the air chamber outlet bushing and a connecting wing plate extending radially outward from the connecting sleeve, and the copper busbar is connected to the connecting wing plate.

8. The busbar conductor assembly according to claim 7, characterized in that: The copper bars are connected to both sides of the connecting wing plate respectively, and the outer contours of the rib-shaped heat sinks of the radiator on the two copper bars are assembled into a circle.

9. A gas insulated busbar, comprising a cylinder assembly and a busbar conductor assembly, characterized in that: The busbar conductor assembly is the busbar conductor assembly according to any one of claims 1 to 8.

10. The gas insulated busbar according to claim 9, characterized in that: The cylinder assembly comprises two metal cylinders and a telescopic cylinder connected between the two metal cylinders. The telescopic cylinder is a rubber cylinder, and a lantern-shaped section is arranged between the two ends of the rubber cylinder.

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