A conductor-connected voltage equalizing enclosure and a gas-insulated device

Abstract

This application discloses a voltage equalization enclosure and a gas insulation device for conductor connection in the field of power equipment technology. The voltage equalization enclosure is used for the interconnection of busbars and includes an end face and a smooth outer surface formed by a side face with rotational symmetry. The outer surface is a conductor. The side face and the end face are smoothly transitioned. The end face has more than one slot, and all slots are connected at the geometric center of the side face. The slot is used for the insertion and overlapping of busbar connectors. The side face has fastener mounting holes in a direction perpendicular to the overlapping surface of the busbar connectors. After fastening, the fasteners are submerged in the side face. The outline of the slot on the end face is a smooth curve. This solution solves the problem that the insulation performance of the existing conductor connection structure is not suitable for environmentally friendly insulating gases with weak insulation performance. It achieves the beneficial effects of uniform electric field, improved insulation performance between parts, and the use of multiple conductor structures.

Description

Technical Field

[0001] This application relates to the field of power equipment technology, specifically to a conductor-connected equalizing enclosure and a gas-insulated device. Background Technology

[0002] In equipment with strong insulating properties for insulating gases, such as equipment filled with SF6 gas, conductor connections can be fixed with ordinary fasteners. However, this structure has many edges and points and a poor electric field, making it unsuitable for environmentally friendly gas-insulated equipment. Most environmentally friendly gases have weak insulation properties, and it is usually necessary to add a shielding cover to shield the areas where the electric field is concentrated on the busbar of the gas filling cabinet, so as to make the electric field distribution more reasonable. This solution will inevitably increase material and processing costs. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this application provides a voltage equalization enclosure and a gas insulation device for conductor connections, thereby solving the problem that the insulation performance of existing conductor connection structures is not suitable for environmentally friendly insulating gases with weak insulation properties.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A busbar fixing structure for gas-insulated equipment, used for interconnecting busbars, includes an end face and an outer surface formed by a side surface with rotational symmetry. The outer surface is a conductor. The side surface smoothly transitions to the end face. The end face has more than one slot, and all slots are connected at the geometric center of the side surface. The slot is used for inserting and overlapping busbar connectors. The side surface has fastener mounting holes perpendicular to the overlapping surface of the busbar connectors. After fastening, the fasteners are submerged in the side surface. The outline of the slot on the end face is a smooth curve.

[0006] Preferably, the side surface is cylindrical.

[0007] Preferably, there are two end faces, and the two end faces are arranged symmetrically with the side face as the geometric center.

[0008] Preferably, two smooth transition zones are provided between the two end faces and the cylindrical surface.

[0009] Preferably, the fastener mounting holes are two fastener mounting holes that are symmetrical and coaxial with the overlapping surfaces of two opposite busbar connectors.

[0010] Preferably, the fastener mounting hole is a stepped hole.

[0011] Preferably, the fastener mounting hole is an internally threaded hole.

[0012] Preferably, the center surfaces of the slots are offset.

[0013] Preferably, the conductor is made of zinc alloy.

[0014] Based on the same inventive concept, this application also discloses a gas-insulated device in which the aforementioned conductor-connected equalizing housings are interconnected with busbars.

[0015] Compared with the prior art, the beneficial effects of this solution are as follows: The equalizing cover for conductor connection of the environmentally friendly gas insulation equipment of this application has a smooth and rounded surface that can cover the busbar end and the connector. The cover wraps around the sharp protrusion of the conductor connection part, so that there are no sharp points on the surface of the component, which plays a role in uniform electric field and improving insulation performance. The charge distribution is uniform and the field strength is good. By optimizing the electric field structure of the conductor connection part, the insulation performance is guaranteed, and the concept of equalizing cover can be applied to various conductor structures. Attached Figure Description

[0016] Figure 1 This is a five-view orthographic projection view of one embodiment of the present solution. Figure 1 'a' is the top view. Figure 1 b is the left view. Figure 1 c is the main view. Figure 1 d is the right view. Figure 1 e is a bottom view;

[0017] Figure 2 This is a three-dimensional exploded view of a solution for fastening the round bar busbar in one embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram illustrating the completed connection of the fastening of the round bar busbar in one embodiment of this solution;

[0019] Figure 4 This is a vertical center sectional view of the fastening of the round bar generatrix according to one embodiment of this solution. Figure 4 a is a cross-sectional view without the equalizing enclosure. Figure 4 b is a cross-sectional view including the equalizing enclosure;

[0020] Wherein, 1-Equalizing cover, 11-Cylindrical surface, 12-End face, 13-Slot, 14a-Screw mounting hole, 14b-Nut mounting hole, 15-Smooth transition area, 2-First busbar, 3-Second busbar, 4-Screw, 5-Nut. Detailed Implementation

[0021] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0022] This application provides an embodiment of a conductor connection equalizing housing 1: This embodiment is used for the interconnection of busbars, including an end face 12 and a smooth outer surface formed by a side surface with rotational symmetry. The outer surface is a conductor. The side surface smoothly transitions to the end face 12. The end face has more than one slot 13, and all slots 13 are connected at the geometric center of the side surface. The slots are used for the insertion and overlapping of busbar connectors. The side surface has fastener mounting holes perpendicular to the overlapping surface of the busbar connectors. After fastening, the fasteners are submerged in the side surface. The outline of the slots 13 on the end face 12 is a smooth curve. The side surface with rotational symmetry can be a sphere or a cylindrical surface 11. This embodiment uses a cylindrical surface 11. The end face 12 can be used for the interconnection of two, three, or four busbars. This embodiment uses the case of connecting only two busbars, that is, there are two end faces 12, and the two end faces 12 are symmetrically arranged with the side surface as the geometric center. Two smooth transition areas 15 are provided between the two end faces 12 and the cylindrical surface 11.

[0023] Gas-insulated equipment commonly uses two busbar shapes: square bars and round bars. This application selects round bar busbars, which have a more complex joint shape. The conventional shape of a round bar busbar joint is to flatten and drill holes at the ends. In this embodiment, the slots 13 are staggered along the center plane for the busbar ends. They can also be arranged on the same plane, but half of the busbar ends are removed. However, this solution is not conducive to the processing of the busbar ends. After the busbar ends are inserted into the equalizing cover 1, the end holes of the two busbars are coaxial. In this embodiment, the fastener mounting holes are two symmetrical and coaxial fastener mounting holes on the overlapping surfaces of the two busbar connectors. The fastener can pass from one fastener mounting hole to the other. In this embodiment, the fasteners are connected by screws 4 and nuts 5. After tightening, both screws 4 and nuts 5 are submerged in the cylindrical surface.

[0024] The outer surface of the equalizing cover 1 should have conductive properties and can be made of metal or other conductive materials. In the embodiments of this application, a cost-effective zinc alloy is selected.

[0025] When further optimization of the surface electric field is required, the function of nut 5 can be integrated into the equalizing housing 1. This involves eliminating the nut mounting hole on one side, maintaining the smooth shape of the housing surface on that side, and adding an internal thread at the original nut 5 location for connecting screw 4. In this case, the equalizing housing 1 should be made of a high-strength metal to ensure thread strength. The fastener mounting hole can also be a stepped hole to ensure consistent screw insertion into the surface of the equalizing housing 1. For higher voltage levels, the surface roughness of the equalizing housing 1 can also be increased to achieve a better electric field distribution.

[0026] During assembly, the equalizing housing 1 of this application is first inserted into the equalizing housing 1 from two directions, with the planes of the connectors fitting together and the connection holes coaxial. Screws 4 are then inserted through the screw mounting holes of the equalizing housing 1, sequentially passing through the connection holes of the first busbar 2 and the second busbar 3. Nuts are then screwed onto the screws through the nut mounting holes of the equalizing housing 1, and screws 4 and nuts 5 are tightened using a screwdriver to complete the installation. At this point, the busbar connection points are submerged within the equalizing housing 1, and the electric field strength is determined by the shape of the outer surface of the equalizing housing 1. Achieving equalization through the rounded shape of the equalizing housing 1 makes it widely applicable in environmentally friendly gas-insulated equipment.

[0027] Based on the same inventive concept, this application also discloses a gas-insulated device, in which the aforementioned equalizing enclosure 1 connected to the busbars is interconnected. The equalizing enclosure 1 can be widely used in environmentally friendly gas-insulated devices of various voltage levels.

[0028] The above description is only a preferred embodiment of the present solution, but the scope of protection claimed by the present solution is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and inventive concept of this application, should be included within the scope of protection of this application.

Claims

1. A voltage equalization enclosure for conductor connections, used for interconnection of busbars, characterized in that: The device includes an end face (12) and a side face with rotational symmetry, forming a smooth outer surface. The outer surface is a conductor. The side face and the end face (12) are smoothly transitioned. The end face (12) has more than one slot (13) and all slots (13) are connected at the geometric center of the side face. The slots (13) are used for the insertion and overlapping of the busbar connector. The side face has fastener mounting holes in a direction perpendicular to the overlapping surface of the busbar connector. After fastening, the fastener is submerged in the side face. The outline of the slots (13) on the end face (12) is a smooth curve.

2. The voltage equalization housing for conductor connections according to claim 1, characterized in that: The side surface uses a cylindrical surface (11).

3. The voltage equalization cover for conductor connections according to claim 2, characterized in that: There are two end faces (12), and the two end faces (12) are arranged symmetrically with the side as the geometric center.

4. The voltage equalization housing for conductor connections according to claim 3, characterized in that: Two smooth transition zones (15) are provided between the two end faces (12) and the cylindrical surface (11).

5. The voltage equalization housing for conductor connections according to claim 2, characterized in that: The fastener mounting holes are two fastener mounting holes that are symmetrical and coaxial with the overlapping surfaces of two opposite busbar connectors.

6. The voltage equalization housing for conductor connections according to claim 5, characterized in that: The fastener mounting holes use stepped holes.

7. The voltage equalization housing for conductor connections according to claim 2, characterized in that: The fastener mounting holes are internally threaded holes.

8. The voltage equalization housing for conductor connections according to claim 7, characterized in that: The center planes of the slots (13) are offset.

9. The voltage equalization housing for conductor connections according to claim 8, characterized in that: The conductor is made of zinc alloy.

10. A gas-insulating device, characterized in that: The busbars are interconnected using the equalizing enclosure (1) with conductors connected according to any one of claims 1-9.

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