Plateau type bus sleeve suitable for high altitude terrain
By introducing an insulating cylindrical partition structure, a metal shielding mesh ring, and an umbrella-shaped skirt design into the busbar bushing, the creepage and breakdown problems in high-altitude areas are solved, achieving a busbar bushing with high safety and protection levels.
Patent Information
- Application Number
- CN202422599613.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-10-28
AI Technical Summary
Existing busbar bushings are prone to surface creep and breakdown in high-altitude areas, especially in high-current environments, which can easily lead to flashover and breakdown.
A high-altitude busbar bushing was designed, comprising an insulating cylinder, a busbar support disc with an inner cavity, a metal shielding mesh, an umbrella-shaped skirt, and a flange structure, which enhances insulation performance and creepage distance. The metal shielding mesh and flange achieve grounding shielding and high-voltage equipotential balance.
It improves the safety of busbar bushings in high-altitude areas, prevents flashover and breakdown, meets the IP4X safety protection level, and effectively discharges water vapor, avoiding water flow continuity and dust accumulation.
Smart Images
Figure CN223613008U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to bus bushing technical field, concretely relates to a plateau type bus bushing suitable for high altitude terrain. BACKGROUND
[0002] The main role of bus bushing is to carry out insulation protection when bus passes through metal partition plate between high voltage switch cabinet, currently, general bus bushing includes the cylinder of epoxy insulating material casting forming and the partition plate in the middle of cylinder, is equipped with bus outgoing line mouth on both sides of cylinder respectively, and the busbar is inserted into the insulating cylinder through outgoing line mouth and contacts with the insulating partition plate in the middle of insulating cylinder.
[0003] The existing bus bushing is often applied to the area below 1000m altitude, when it is applied in the plateau area of high altitude, especially in the area reaching 3000m and above, because air is relatively thin, dielectric constant drops, surface creepage phenomenon or breakdown easily appears due to high voltage, especially when using in the environment of large current, because the creepage distance is small, the umbrella skirt is unreasonable, it is more likely to cause flashover, breakdown and other phenomena. SUMMARY
[0004] The utility model aims at solving some problems in prior art, for this purpose, one purpose of the utility model lies in providing the plateau type bus bushing suitable for high altitude terrain, it has higher safety, and is not prone to sliding flashover, breakdown and other characteristics.
[0005] In order to realize the above-mentioned purpose, the utility model provides:
[0006] A plateau type bus bushing suitable for high altitude terrain, including the insulating cylinder with inner cavity, the both ends of insulating cylinder are equipped with outgoing line mouth with the inner cavity, the inner cavity of insulating cylinder is provided with busbar support round plate in the middle, the middle of busbar support round plate is provided with a through hole, the inner cavity of insulating cylinder is divided into two cavities by busbar support round plate, the outside of insulating cylinder is provided with a plurality of umbrella skirts with high-low undulating staggered.
[0007] As preferred, the inside of insulating cylinder is provided with two metal shielding mesh rings, including grounding mesh ring and high voltage shielding mesh ring, the grounding mesh ring and high voltage shielding mesh ring are arranged separately.
[0008] As preferred, the middle position of the outside of insulating cylinder is provided with flange plate, the four corners of flange plate are provided with a first bolt mounting insert respectively, the first bolt mounting insert is connected with the grounding mesh ring in the inside of insulating cylinder.
[0009] Preferably, a protruding insulation ring is arranged in the inner cavity of the insulation cylinder, the busbar support circular plate abuts against the insulation ring, and a plurality of second bolt mounting inserts are arranged on one side of the insulation ring and connected with the high-voltage shielding mesh in the inner cavity of the insulation cylinder.
[0010] Preferably, the umbrella-shaped skirt is symmetrically arranged on the outer side of the insulation cylinder and forms an angle with the outer side of the insulation cylinder.
[0011] Preferably, the two cavities separated by the insulation cylinder are both stepped and have an inclination angle of not less than 3°.
[0012] Preferably, the distance L between the flange and the side of the insulation cylinder is at least 260 mm.
[0013] Preferably, the mounting plate arranged on the flange and the busbar passing through the inner cavity of the insulation cylinder are locked and fixed by fasteners respectively with the first bolt mounting insert and the second bolt mounting insert.
[0014] The utility model discloses beneficial effects:
[0015] The inner cavity of the insulation cylinder is provided with a busbar support circular plate of silicon rubber, the busbar support circular plate separates the insulation cylinder into two cavities after installation, supports the busbar at the same time and reaches the safety protection level requirement of IP4X.
[0016] The umbrella-shaped skirt arranged on the outer side of the insulation cylinder makes the outer creepage distance of the insulation cylinder not less than 1037 mm, and even if water flows on the surface of the insulation cylinder, the umbrella-shaped skirt can cut off the water flow, so that a continuous water line cannot be formed and dust is not easy to accumulate, and the water droplets cannot stay on the umbrella-shaped skirt, thereby ensuring safety.
[0017] The two metal shielding meshes in the insulation cylinder play the roles of high-voltage equipotential and grounding shielding respectively, the two cavities of the insulation cylinder are designed as two stepped types, the two steps have inclination angles of not less than 3°, which is beneficial to the demoulding of a mold during product pouring and beneficial to the discharge of water vapor in the insulation cylinder during product use, and condensation is not easy to occur.
[0018] The square flange is arranged on the outer side of the insulation cylinder, the first bolt insert on the flange is connected with the grounding mesh in the inner cavity of the insulation cylinder through internal wires and plays the role of grounding shielding.
[0019] The protruding insulation ring is arranged in the inner cavity of the insulation cylinder, the second bolt insert on the upper surface of the insulation ring is connected with the high-voltage shielding mesh and the busbar through wires respectively and plays the role of balancing the electric field.
[0020] The features and advantages of this utility model will be described in detail through embodiments in conjunction with the accompanying drawings. Attached Figure Description
[0021] Figure 1 This is a cross-sectional view of the present invention;
[0022] Figure 2 This is a side view of the present invention.
[0023] Reference numerals: 1. Insulating cylinder; 2. Busbar support plate; 3. Umbrella-shaped skirt; 4. Grounding mesh ring; 5. High-voltage shielding mesh ring; 6. Flange; 7. First bolt mounting insert; 8. Insulating ring; 9. Second bolt mounting insert; 10. Mounting plate; 11. Busbar; 12. Conductor. Detailed Implementation
[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0025] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses consistent with some aspects of this application as detailed in the appended claims.
[0026] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, the technical or scientific terms used in this application should be understood in their ordinary sense by one of ordinary skill in the art to which this utility model pertains. The words “a” or “one” and similar terms used in this application specification and claims do not indicate a limitation of quantity, but rather indicate the presence of at least one. “A plurality” includes two, equivalent to at least two. The words “comprising” or “including” and similar terms mean that the element or object preceding “comprising” or “including” covers the element or object listed following “comprising” or “including” and its equivalents, and does not exclude other elements or objects. The words “connected” or “linked” and similar terms are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. The singular forms “a,” “the,” and “the” used in this application specification and appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more associated listed items.
[0027] Please refer toFigures 1-2 The plateau type bus sleeve suitable for high altitude terrain includes an insulating cylinder 1 made of epoxy insulating material (epoxy resin material) and having an inner cavity, the length of the insulating cylinder 1 is 560 mm, and the outer diameter is 300 mm. Two ends of the insulating cylinder 1 are provided with line inlet and outlet ports communicated with the inner cavity, for the installation of a busbar 11, and a busbar 11 supporting disc 2 made of silicone rubber is arranged in the inner cavity of the insulating cylinder 1, the middle of the busbar 11 supporting disc 2 is provided with a through hole for the installation of the busbar 11, and the busbar 11 supporting disc 2 divides the inner cavity of the insulating cylinder 1 into two cavities, both of which are stepped and have an inclination angle of not less than 3°, which is beneficial to the release of the mold during product pouring and the discharge of water vapor in the insulating cylinder 1 during product use, and is not prone to condensation.
[0028] Please refer to Figure 1 The outer part of the insulating cylinder 1 is provided with a plurality of umbrella-shaped skirts 3 in staggered high and low relief. The sizes of the umbrella-shaped skirts 3 are staggered to increase the creepage distance, so that the outer creepage distance of the insulating cylinder 1 is greater than 1037 mm, meeting the use requirements of high altitude (altitude 3000 meters).
[0029] Further, the umbrella-shaped skirts are symmetrically arranged on the outer side of the insulating cylinder 1 and form an included angle with the outer side of the insulating cylinder 1. The umbrella-shaped skirts arranged on the outer part of the insulating cylinder 1 can block the water flow and prevent it from forming a continuous water line, so that dust is not easily accumulated, and the water droplets are not easily accumulated on the umbrella-shaped skirts, ensuring safety.
[0030] Please refer to Figure 1 and Figure 2 The inner part of the insulating cylinder 1 is provided with two metal shielding mesh rings, specifically, the metal shielding mesh rings include a grounding mesh ring 4 and a high-voltage shielding mesh ring 5, which respectively play the roles of grounding shielding and high-voltage equipotential, and the grounding mesh ring 4 and the high-voltage shielding mesh ring 5 are arranged separately, that is, the two metal shielding mesh rings in the inner part of the insulating cylinder 1 are not connected, and the middle is filled with epoxy resin material for pouring the insulating cylinder 1.
[0031] Further, the two metal shielding mesh rings are made of brass mesh, which can better combine with the epoxy resin.
[0032] Please refer to Figure 1 and Figure 2The middle part of the outer part of the insulating cylinder 1 is provided with a square flange 6 with a size of 340mm*340mm*35mm, and each corner of the flange 6 is provided with a first bolt mounting insert 7 with a M10, which is connected with the grounding mesh 4 in the inner part of the insulating cylinder 1.
[0033] Please refer to Figure 1 The inner cavity of the insulating cylinder 1 is provided with a protruding insulating ring 8 with a thickness of 20mm, and the protruding height of the insulating ring 8 is 15mm; the busbar 11 supporting plate 2 is abutted on the insulating ring 8, and the insulating ring 8 is used for limiting the position of the busbar 11 supporting plate 2 in the middle of the insulating cylinder 1.
[0034] Further, the insulating ring 8 is provided with two second bolt mounting inserts 9 with a M5 on one side, which are connected with the high-voltage shielding mesh 5 in the inner part of the insulating cylinder 1; the two second bolt mounting inserts 9 on the insulating ring 8 are connected with the metal shielding mesh and the busbar 11 in the insulating cylinder through wires 12 respectively, and the two second bolt mounting inserts 9 play a role in balancing the electric field.
[0035] Further, the distance L between the flange 6 and the side of the insulating cylinder 1 is at least 260mm, and in the embodiment, the distance L is about 270mm.
[0036] Please refer to Figure 1 The highland type bus sleeve also comprises a mounting plate 10 arranged on the flange 6 and a busbar 11 passing through the inner cavity of the insulating cylinder 1, and the mounting plate 10 and the busbar 11 are respectively locked and fixed with the first bolt mounting insert and the second mounting insert through fasteners.
[0037] The utility model discloses a highland type bus sleeve, which is suitable for high-altitude areas and comprises an insulating cylinder 1 provided with an inner cavity, line inlet and outlet ports are arranged at two ends of the insulating cylinder 1, a square flange 6 is arranged at the middle of the outer part of the insulating cylinder 1, a first bolt mounting insert 7 with a M10 is arranged at each corner of the square flange 6, the first bolt mounting insert 7 is connected with a grounding mesh 4 in the inner part of the insulating cylinder 1 through wires 12, the first bolt mounting insert 7 is connected with a metal mounting plate 10 of a switch cabinet bus sleeve through bolts, and reliable grounding is realized outside the bus sleeve.
[0038] The insulating cylinder 1 has a protruding insulating ring 8 in the middle of the inner cavity, and each of the upper and lower sides of the insulating ring 8 has one M5 second bolt mounting insert 9, the second bolt mounting insert 9 is connected with the high-voltage shielding mesh 5 in the inner cavity of the insulating cylinder 1 through an internal lead 12, and the second bolt mounting insert 9 is also connected with the busbar 11 through the lead 12, the high-voltage shielding mesh 5, the lead 12 and the busbar 11 are reliably connected, the high-voltage components in the insulating cavity of the busbar sleeve are all connected, and the high-voltage equipotential and balanced electric field are achieved. One side of the insulating ring 8 is provided with a silicon rubber busbar 11 supporting circular plate 2, the silicon rubber busbar 11 supporting circular plate 2 can stably support the busbar 11, and the insulating cylinder 11 is divided into two cavities, so that the safety protection level requirement of IP4X is achieved.
[0039] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. It should be understood by the skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only for illustrating the principle of the utility model, and various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A plateau type bus duct suitable for high altitude terrain, comprising an insulating cylinder having an inner cavity, and line inlet and outlet ports are formed at both ends of the insulating cylinder to communicate with the inner cavity, characterized in that, The inner cavity of the insulating cylinder is provided with a busbar support circular plate, the middle of the busbar support circular plate is provided with a through hole, the busbar support circular plate divides the inner cavity of the insulating cylinder into two cavities, and the outer part of the insulating cylinder is provided with a plurality of umbrella-shaped skirts in staggered arrangement.
2. The plateau type bus duct suitable for high altitude terrain according to claim 1, wherein, The inner part of the insulating cylinder is provided with two metal shielding mesh rings, including a grounding mesh ring and a high-voltage shielding mesh ring, and the grounding mesh ring and the high-voltage shielding mesh ring are arranged in a separated manner.
3. The plateau type bus duct suitable for high altitude terrain according to claim 2, wherein, The middle part of the outer part of the insulating cylinder is provided with a flange plate, each of the four corners of the flange plate is provided with a first bolt mounting insert, and the first bolt mounting insert is connected with the grounding mesh ring in the inner part of the insulating cylinder.
4. The plateau type bus duct suitable for high altitude terrain according to claim 2, wherein, The middle of the inner cavity of the insulating cylinder is provided with a protruding insulating circular ring, the busbar support circular plate abuts against the insulating circular ring, one side of the insulating circular ring is provided with a plurality of second bolt mounting inserts, and the second bolt mounting inserts are connected with the high-voltage shielding mesh ring in the inner part of the insulating cylinder.
5. The plateau type bus duct suitable for high altitude terrain according to any one of claims 1 to 4, wherein The umbrella-shaped skirts are symmetrically arranged on the outer side of the insulating cylinder, and the umbrella-shaped skirts form an included angle with the outer side of the insulating cylinder.
6. The plateau type bus duct suitable for high altitude terrain according to any one of claims 1 to 4, wherein The two cavities divided by the insulating cylinder are both in a stepped shape, and the two cavities both have an inclination angle of not less than 3°.
7. The plateau type bus duct suitable for high altitude terrain according to claim 3, wherein, The distance L between the flange plate and one side of the insulating cylinder is at least 260 mm.
8. The plateau type bus duct suitable for high altitude terrain according to claim 7, wherein, The installation plate arranged on the flange plate and the busbar penetrating through the inner cavity of the insulating cylinder are further included.