Plateau shielding type contact box suitable for high altitude terrain
By setting multiple insulating protective covers and umbrella-shaped skirts on the contact box, combined with flanges and reinforcing ribs, a double shielding structure is formed, which solves the problems of creepage flashover and breakdown in high-altitude areas and achieves high insulation safety.
Patent Information
- Application Number
- CN202422599616.7
- 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 contact boxes are prone to creepage flashover and breakdown in high-altitude areas, especially in high-current environments, where insufficient or improperly positioned sheds can lead to flashover and breakdown problems.
A plateau-shielded contact box was designed, which uses multiple insulating protective covers of different sizes and umbrella-shaped skirts on the insulating body, combined with flanges and reinforcing ribs to form a double shielding structure, increasing the creepage distance and improving insulation performance.
It effectively avoids creepage flashover and breakdown of the contact box in high-altitude areas, improves insulation safety, and meets the insulation requirements at an altitude of 3000 meters.
Smart Images
Figure CN223612854U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of contact box, concretely relates to a highland shielding type contact box suitable for high altitude terrain. BACKGROUND
[0002] The main role of the contact box is installed in the bus chamber and the handcart chamber of the high-voltage switch cabinet, and between the handcart chamber and the cable chamber, which plays the role of separating the high-voltage compartment and insulating and mechanically supporting the connecting part of the circuit breaker handcart contact arm, static contact and outgoing line busbar.
[0003] At present, the general contact box includes a box body made of epoxy resin insulating material, the front part and the upper part of the box body are respectively provided with an outgoing line port and an incoming line port, the circuit breaker handcart contact arm extends into the insulating body through the incoming line port of the front part, and the copper bus extends into the insulating body through the incoming line port of the upper part and is connected with the static contact in the insulating body. The existing conventional contact box can only be applied to the areas below 1000 meters above sea level, when it is applied in the highland areas of high altitude, especially in the areas above 3000 meters above sea level, because the air in the high altitude area is relatively thin, the dielectric constant decreases, and the surface creepage flashover of the contact box or the breakdown caused by high voltage is prone to occur, especially when used in a large current environment, because the creepage distance is small, the umbrella skirt is insufficient or the position is not reasonable, it is more likely to cause flashover, breakdown and other phenomena. CONTENT OF THE UTILITY MODEL
[0004] The utility model aims at solving some problems existing in the prior art. For this purpose, one purpose of the utility model is to propose a highland shielding type contact box suitable for high altitude, which has the technical features of high safety, adaptation to high altitude, and difficulty in sliding flashover and breakdown.
[0005] In order to achieve the above-mentioned purpose, the utility model proposes:
[0006] A highland shielding type contact box suitable for high altitude terrain, comprising an insulating body with an inner cavity, a front end of the insulating body is provided with an incoming line port, and an upper end of the insulating body is provided with an outgoing line port, the incoming line port and the outgoing line port are in communication with the inner cavity of the insulating body, a plurality of insulating protective covers with different sizes and heights are arranged on the upper part of the outgoing line port, a plurality of groups of umbrella skirts are arranged on the outer periphery of the insulating body, and the sizes of the umbrella skirts are staggered.
[0007] As a preferred, the insulating protective cover comprises a first insulating protective cover and a second insulating protective cover, the first insulating protective cover is arranged outside the second insulating protective cover, and the size of the first insulating protective cover is larger than that of the second insulating protective cover.
[0008] As a preferred, a notch is arranged on one side of the first insulating protective cover, and a plurality of groups of umbrella skirts are arranged on the bottom of the first insulating protective cover.
[0009] As preferred, a set of stepped steps are arranged in the inner cavity of the second insulation protective cover, and a dustproof limiting plate is arranged on the stepped steps, and a through hole is formed in the dustproof limiting plate.
[0010] As preferred, two mounting inserts with different sizes, including a first mounting insert and a second mounting insert, are arranged at the bottom end of the inner cavity of the insulation body, and the first mounting insert and the second mounting insert are connected through a brass mesh ring.
[0011] As preferred, a first flange plate is arranged at the upper left side of the insulation body, a second flange plate is arranged at the lower right side of the insulation body, a plurality of third mounting inserts are arranged on the first flange plate and the second flange plate, and the third mounting inserts are connected through copper sheets.
[0012] As preferred, an inner concave cavity is arranged at the right end of the insulation body, the inner side of the inner concave cavity is in a semispherical shape, and the inner concave cavity is in a horn mouth shape, and the horn mouth slope is not less than 8°.
[0013] As preferred, continuous reinforcing ribs are arranged on the two sides of the insulation body, the first flange plate and the second flange plate, the thickness of the reinforcing ribs is not less than 20 mm, and the reinforcing ribs are in a stepped type.
[0014] As preferred, the height of the first insulation protective cover is not less than 400 mm, and the height of the second insulation protective cover is not greater than 250 mm.
[0015] The beneficial effects of the utility model are as follows:
[0016] 1. Two insulation protective covers with different sizes are arranged on the outlet of the insulation body, which can increase the creepage distance and increase the insulation protection, and is safer.
[0017] 2. A plurality of umbrella skirts are arranged at the front end of the insulation body, the middle of the insulation body and the rear side of the insulation body, the umbrella skirts are not the same shape and height, but have ups and downs, which can increase the creepage distance and avoid the small height difference between the umbrella skirts.
[0018] The features and advantages of the utility model will be described in detail in combination with the drawings. DRAWINGS
[0019] Fig. 1 It is a sectional view of the utility model;
[0020] Fig. 2 It is a left view of the utility model;
[0021] Fig. 3The utility model discloses a top view.
[0022] Sign: 1, insulating body; 2, incoming line port; 3, outgoing line port; 4, umbrella skirt; 5, first insulating protective cover; 6, second insulating protective cover; 7, dustproof limiting plate; 8, first installation insert; 9, second installation insert; 10. brass ring; 11. first flange plate; 12. second flange plate; 13. third installation insert; 14. concave cavity; 15. reinforcing rib; 16. metal mounting plate; 17. copper busbar; 18. circuit breaker handcart contact arm; 19. static contact; 20. plum blossom contact. DETAILED DESCRIPTION
[0023] In order to make the technical means, creation features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments.
[0024] The exemplary embodiments will be described in detail hereinbelow with reference to the drawings. In the following description, the same reference numerals are used to denote the same elements in different drawings, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not representative of all embodiments consistent with the present application. Rather, they are merely examples of devices consistent with some aspects of the present application, as detailed in the appended claims.
[0025] The terms used in the present application are merely for the purpose of describing specific embodiments, and are not intended to limit the present application. Unless otherwise defined, technical terms or scientific terms used in the present application should be understood by those skilled in the art as their usual meanings. The use of "one" or "a" and similar words in the specification and claims of the present application does not represent a quantitative limitation, but means that at least one exists. "Multiple" includes two, which is equivalent to at least two. "Include" or "contain" and similar words mean that the elements or objects appearing before "include" or "contain" cover the elements or objects listed after "include" or "contain" and their equivalents, and do not exclude other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The singular form "a", "said" and "the" used in the specification and the appended claims are also intended to include the plural form, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein means and includes any or all possible combinations of one or more associated listed items.
[0026] Please refer to Figs. 1-3The application discloses a plateau shielding contact box suitable for high-altitude terrains, which comprises an insulating body 1 made of epoxy resin material and provided with an inner cavity, wherein the appearance size of the insulating body 1 is 735mm*310mm*600mm, a wire inlet 2 of a circuit breaker trolley contact arm 18 is arranged at the front end of the insulating body 1, a wire outlet 3 of a copper bus 17 is arranged at the upper end of the insulating body 1, the wire inlet 2 and the wire outlet 3 are communicated with the inner cavity of the insulating body 1, that is, the wire inlet 2 and the wire outlet 3 are communicated with each other, two mounting inserts with different sizes, namely a first mounting insert 8 and a second mounting insert 9, are arranged at the bottom end of the inner cavity of the insulating body, a bolt hole with an M16 size is arranged on the first mounting insert 8 and used for mounting the copper bus 17 and a static contact 19, a bolt hole with an M12 size is arranged on the second mounting insert 9 and used for fixing the copper bus 17 so as to prevent the copper bus 17 from being installed to be inclined.
[0027] Further, the first mounting insert 8 and the second mounting insert 9 are connected through a brass ring 10 with a diameter of 155mm, so as to balance the electric field and form a high-voltage equipotential shield; the height of the first mounting insert 8 and the second mounting insert 9 exposed from the insulating body 1 is not less than 15mm, so as to pad the copper bus 17 and prevent a micro air gap from being formed between the copper bus 17 and an epoxy resin layer of the insulating body 1 to cause discharge.
[0028] Further, two insulating protective covers with different sizes and heights are arranged at the upper portion of the wire outlet 3, the insulating protective covers comprise a first insulating protective cover 5 and a second insulating protective cover 6, the first insulating protective cover 5 is arranged outside the second insulating protective cover 6 and has a size larger than that of the second insulating protective cover 6, and the creepage distance can be increased.
[0029] Further, a notch is arranged at one side of the first insulating protective cover 5, on one hand, the notch is designed for facilitating the copper bus 17 to be bent to be wired out, and on the other hand, the notch is designed for avoiding the copper bus 17 from being too close to the insulating protective cover to prevent a small air gap discharge from occurring when the copper bus 17 is in a live operation.
[0030] Further, a group of stepped steps are arranged in the inner cavity of the second insulating protective cover 6, a dustproof limiting plate 7 made of silicone rubber is clamped and mounted on the stepped steps, a through hole is arranged on the dustproof limiting plate 7 and used for the copper bus 17 to be passed and arranged, on one hand, the dustproof limiting plate 7 is designed for fixing and supporting the copper bus 17 to prevent the copper bus 17 from being inclined, and on the other hand, the dustproof limiting plate 7 is designed for preventing external dust, condensation and contamination from entering the inner cavity of the contact box to cause a discharge accident.
[0031] Further, the height of the first insulating protective cover 5 is not less than 400mm, on one hand, the height is designed for increasing the creepage distance, and on the other hand, the height is designed for increasing the insulation protection, so that the air clearance between the copper bus 17 and mounting bolts of a first flange plate 11 is greater than 360mm; the height of the second insulating protective cover 6 is not greater than 250mm, so as to avoid the height difference between the two insulating protective covers being small to cause an invalid creepage distance.
[0032] Further, the bottom of the first insulation shield 5 has three groups of umbrella skirts 4, which can increase the creepage distance.
[0033] Further, the outer periphery of the insulation body 1 is provided with several groups of umbrella skirts 4, and the sizes of the umbrella skirts 4 are staggered. Specifically, the front end of the insulation body 1 has several groups of umbrella skirts 4 for increasing the creepage distance, the middle part of the insulation body 1 has several groups of umbrella skirts 4 for increasing the creepage distance, and the rear side of the insulation body 1 has several groups of umbrella skirts 4 for increasing the creepage distance. The umbrella skirts 4 on the insulation body 1 are not of the same shape and height, but have ups and downs, which can increase the creepage distance and avoid the small height difference between the umbrella skirts 4, thereby causing ineffective creepage distance.
[0034] Further, the upper left side of the insulation body 1 is provided with a first flange plate 11 perpendicular to the insulation body 1, and the vertical height of the first flange plate 11 is not less than 380 mm, which is to make the air clearance between the grounding end of the installation flange and the contact arm 18 of the circuit breaker trolley greater than 360 mm, thereby meeting the insulation requirement at an altitude of 3000 meters.
[0035] Further, the lower right side of the insulation body 1 is provided with a second flange plate 12 perpendicular to the insulation body 1, and the vertical height of the second flange plate 12 is not greater than 200 mm, which is to meet the requirement of 400 mm distance between the upper and lower poles of the circuit breaker.
[0036] Further, the first flange plate 11 and the second flange plate 12 are each provided with three M10 third mounting inserts 13, the center distance between the third mounting inserts 13 is 120 mm, and the third mounting inserts 13 are connected by copper sheets and poured into the epoxy resin material of the flange plate, which is to form an equipotential shield of the grounding end.
[0037] Specifically, the copper bus 17 passes through the outlet 3 and the dust-limiting plate 7, the right side of the copper bus 17 is connected to the first mounting insert 8 and the second mounting insert 9 through bolt fastening, the left side of the copper bus 17 is connected to the static contact 19 through bolt fastening, the circuit breaker trolley contact arm 18 connected to the star contact 20 passes through the inlet 2 and is connected to the static contact 19 through sliding connection. The first flange plate 11 and the second flange plate 12 are connected to the metal mounting plate 16 of the high-voltage switch cabinet through bolts, and the metal mounting plate 16 is reliably grounded through the grounding system of the high-voltage switch cabinet.
[0038] As a preferred embodiment, the mounting inserts used in the insulation body 1 are all made of brass, which can avoid rusting and has better combination with the epoxy resin material of the insulation body 1, thereby having sufficient bonding strength.
[0039] In summary, the insulation body 1 has two flange ground end shields and double shielding structures of the high-voltage equipotential shield of the inner cavity busbar static contact 19 mounting insert and the brass ring 10, so that the insulation performance of the insulation body 1 is more excellent, and the insulation and partial discharge requirements at an altitude of 3000 meters are met.
[0040] Further, the right end of the insulation body 1 is provided with an inner recessed cavity 14, the inner side of the inner recessed cavity 14 is in a semispherical shape, the inner recessed cavity 14 is in a horn mouth shape, and the horn mouth slope is not less than 8°. Firstly, the epoxy resin material is reduced, the product weight is reduced, and the production cost is reduced. Secondly, the semispherical design enhances the mechanical strength and bonding force of the mounting insert. Thirdly, the horn mouth shape and the semispherical design are more convenient for mold demolding during production pouring, and the product qualification rate is improved.
[0041] Further, the two sides of the insulation body 1, the first flange 11 and the second flange 12 are provided with continuous reinforcing ribs 15, the thickness of the reinforcing ribs 15 is not less than 20mm, the reinforcing ribs 15 are in a stepped type, the height of the step is 10mm, and the thickness is 8mm. The reinforcing ribs 15 can make the mechanical strength of the insulation body 1 higher, prevent pouring deformation, and on the other hand, the stepped reinforcing ribs 15 make the three-phase contact box interlock and lap when installed, avoid the lap joint to form a joint, and meet the IP4X protection level requirement.
[0042] The basic principle and main features of the utility model and the advantages of the utility model are shown and described. It should be understood by those skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model can also have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.
Claims
1. A plateau shielding contact box suitable for high altitude terrain, comprising an insulating body having an inner cavity, a wire inlet opening is formed in the front end of the insulating body, and a wire outlet opening is formed in the upper end of the insulating body, the wire inlet opening and the wire outlet opening are in communication with the inner cavity of the insulating body, characterized in that, The upper part of the outlet is provided with several insulation protective covers with different sizes and heights, and the outer periphery of the insulation body is provided with several groups of umbrella-shaped skirts with staggered sizes.
2. The plateau shielded contact box suitable for high altitude terrain according to claim 1, wherein, The insulation protective cover comprises a first insulation protective cover and a second insulation protective cover, the first insulation protective cover is arranged outside the second insulation protective cover, and the size of the first insulation protective cover is larger than that of the second insulation protective cover.
3. The plateau shielded contact box suitable for high altitude terrain according to claim 2, wherein, The first insulation protective cover is provided with a notch on one side, and the bottom of the first insulation protective cover is provided with several groups of umbrella-shaped skirts.
4. The plateau shielded contact box suitable for high altitude terrain according to claim 2, wherein, The inner cavity of the second insulation protective cover is provided with a group of stepped steps, a dustproof limiting plate is installed on the stepped steps, and a through hole is formed in the dustproof limiting plate.
5. The plateau shielded contact box suitable for high altitude terrain according to claim 1, wherein, The bottom end of the inner cavity of the insulation body is provided with two mounting inserts with different sizes, including a first mounting insert and a second mounting insert, and the first mounting insert and the second mounting insert are connected through a brass mesh ring.
6. The plateau shielded contact box suitable for high altitude terrain according to any one of claims 1-5, characterized in that, The upper left side of the insulation body is provided with a first flange plate, the lower right side of the insulation body is provided with a second flange plate, and the first flange plate and the second flange plate are both provided with several third mounting inserts, and the third mounting inserts are connected through copper sheets.
7. The plateau shielded contact box suitable for high altitude terrain according to claim 6, wherein, The right end of the insulation body is provided with an inner recessed cavity, the inner side of the inner recessed cavity is semispherical, and the inner recessed cavity is trumpet-shaped, and the trumpet slope is not less than 8°.
8. The plateau shielded contact box suitable for high altitude terrain according to claim 6, wherein, The two sides of the insulation body, the first flange plate and the second flange plate are provided with continuous reinforcing ribs, the thickness of the reinforcing ribs is not less than 20mm, and the reinforcing ribs are stepped.
9. The plateau shielded contact box suitable for high altitude terrain according to claim 2, wherein, The height of the first insulation protective cover is not less than 400mm, and the height of the second insulation protective cover is not greater than 250mm.