Mechanism insulation protection structure of circuit breaker

Abstract

The utility model relates to a mechanism insulation protection structure of a circuit breaker, which comprises a shell, the shell is provided with a base, a rotating shaft is arranged in the base, a clamping ring is wound on the rotating shaft, the clamping ring is connected with a partition plate, and the partition plate comprises a short side plate, a long side plate and a convex plate which is respectively connected with the short side plate and the long side plate. Nested grooves are formed in the positions, corresponding to the clamping rings, of the two sides of the rotating shaft of the base, the two sides of the protruding plate extend to form protruding strips in the direction perpendicular to the short side plate and the long side plate, and the protruding strips are matched with the nested grooves in the base. According to the utility model, through the close fit between the clamping ring and the nesting groove on the base and the interaction between the raised line on the partition plate and the nesting groove, the electrical gap and creepage distance between phases are increased, the direct path between different potentials is effectively blocked, the insulation strength between the mechanism phases is obviously improved, and the reliability of the mechanism is improved. And the phenomena of short circuit fault and serial arc breakdown caused by insufficient electrical clearance or creepage distance can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an insulating protection structure for the mechanism of a circuit breaker. Background Art

[0002] In power transmission and distribution systems, high-voltage products such as circuit breakers with AC800V or DC1500V and above play a crucial role. These products not only need to withstand the impact of high voltage and large current, but also must maintain stable insulation performance under various complex environmental conditions to ensure the safe operation of the power system. In the prior art, high-voltage circuit breakers usually adopt a variety of insulating materials and structural designs to enhance insulation performance. However, under extreme operating conditions, such as overvoltage, overcurrent, sudden temperature change or increased humidity, the phase-to-phase insulation of the mechanism may be severely affected, resulting in a decline in insulation performance. When the insulation performance drops to a certain extent, short-circuit faults are likely to occur, which may further lead to internal insulation breakdown of the mechanism and even serious consequences such as the burning of the whole machine. Content of the Utility Model

[0003] In view of this, the purpose of the utility model is to provide an insulating protection structure for the mechanism of a circuit breaker with a simple structure, good insulation performance and high safety.

[0004] To achieve the above purpose, the utility model adopts such an insulating protection structure for the mechanism of a circuit breaker, which includes a housing. The housing has a base, a rotating shaft is arranged in the base, a snap ring is arranged on the rotating shaft, a partition is connected to the snap ring. The partition includes a short side plate, a long side plate and convex plates respectively connected to the short side plate and the long side plate. Nested grooves are formed in the base on both sides of the rotating shaft corresponding to the position of the snap ring. The two sides of the convex plate extend out convex strips in the direction perpendicular to the short side plate and the long side plate, and the convex strips are matched with the nested grooves on the base.

[0005] The beneficial effect of the above structure is that through the close cooperation between the snap ring and the nested grooves on the base, and the interaction between the convex strips on the partition and the nested grooves, the electrical clearance and creepage distance between phases are increased, effectively blocking the direct path between different potentials, significantly improving the insulation strength between phases of the mechanism, and being able to prevent short-circuit faults and series arc breakdown phenomena caused by insufficient electrical clearance or creepage distance, thereby ensuring the stable operation of the circuit breaker and the safety of the power system.

[0006] This utility model is further configured such that the short side plate of the partition is flush with one side of the convex plate, while the other side of the convex plate is connected to the long side plate by an inclined surface. Arc-shaped grooves are formed at the lower end edges of the convex plate and both the short side plate and the long side plate. The arc-shaped grooves are semi-circular. The lower ends of the short side plate and the long side plate are on the same horizontal plane, while the lower end of the convex plate is lower than the short side plate and the long side plate. The convex plate is located directly above the snap ring. At both sides of the upper end of the long side plate, there are outward extensions forming clamping portions, and the clamping portions are clamped on the upper edge area of the nested groove on the base. By having the short side plate of the partition flush with one side of the convex plate and the other side of the convex plate connected to the long side plate by an inclined surface, not only is the overall structure of the partition optimized, but also the electrical clearance between phases is further increased due to the presence of the inclined surface. Semi-circular arc-shaped grooves are formed at the lower end edges of the convex plate and both the short side plate and the long side plate, which is used to increase the tortuosity of the creepage path, thereby effectively extending the creepage distance. The lower ends of the short side plate and the long side plate are on the same horizontal plane, while the lower end of the convex plate is lower than the short side plate and the long side plate, enabling the partition to be more accurately positioned on the base during installation. At the same time, the clamping portions formed by the outward extensions at both sides of the upper end of the long side plate can be firmly clamped on the upper edge area of the nested groove on the base, enhancing the connection strength between the partition and the base.

[0007] This utility model is further configured such that the housing further includes a middle cover and an upper cover. The middle cover is covered on the base, and the upper cover is covered on the middle cover. By adding the middle cover and the upper cover, a more enclosed and compact housing structure can be formed, which helps to reduce the influence of the external environment on the internal mechanism of the circuit breaker. Description of the Drawings

[0008] Figure 1 is the structural schematic diagram of an embodiment of the present utility model.

[0009] Figure 2 is the structural schematic diagram of the inner rotating shaft of the base and the partition in an embodiment of the present utility model.

[0010] Figure 3 is the assembly schematic diagram of the rotating shaft and the partition in an embodiment of the present utility model.

[0011] Figure 4 is the side view of the partition in an embodiment of the present utility model.

[0012] Figure 5 is the three-dimensional view of the partition in an embodiment of the present utility model.

[0013] Figure 6 is the front view of the inner rotating shaft of the base in an embodiment of the present utility model.

[0014] Figure 7 is Figure 6 the partial enlarged view of

[0015] Figure 8It is an assembly sectional view of the inner rotating shaft and the partition plate in the base of the embodiment of the present utility model.

[0016] Figure 9 is Figure 8 a partial enlarged view of.

[0017] Figure 10 It is a front view of the inner rotating shaft and the partition plate in the base of the embodiment of the present utility model. Detailed implementation manners

[0018] As Figures 1 - 10 shown, the embodiment of the present utility model provides a mechanism insulation protection structure for a circuit breaker, including a housing 1. The housing 1 includes a base 11, a middle cover 12 covering the base 11, and an upper cover 13 covering the middle cover 12. A rotating shaft 2 is provided in the base 11. A snap ring 3 is fixedly connected to the rotating shaft 2. A partition plate 4 is snap-connected to the snap ring 3. The partition plate 4 includes a short side plate 41, a long side plate 42, and a convex plate 43 respectively connected to the short side plate 41 and the long side plate 42. One side of the short side plate 41 of the partition plate 4 is flush with the convex plate 43, and the other side of the convex plate 43 is connected to the long side plate 42 by an inclined surface 431. An arc-shaped groove 40 is formed at the lower end edge of the convex plate 43 and both the short side plate 41 and the long side plate 42. The arc-shaped groove 40 is semicircular. The lower ends of the short side plate 41 and the long side plate 42 are on the same horizontal plane, and the lower end of the convex plate 43 is lower than the short side plate 41 and the long side plate 42. The convex plate 43 is located directly above the snap ring 3. Nested grooves 111 are formed in the base 11 on both sides of the rotating shaft 2 corresponding to the position of the snap ring 3. Convex strips 432 extend from both sides of the convex plate 43 in a direction perpendicular to the short side plate 41 and the long side plate 42. The convex strips 432 cooperate with the nested grooves 111 on the base 11. The upper ends of both sides of the long side plate 42 extend outward to form clamping portions 421. The clamping portions 421 are clamped in the upper edge region of the nested grooves 111 on the base 11.

[0019] It should be noted that only one partition plate is marked in detail in the drawings, but the whole structure actually includes two partition plates, and the structures of the two partition plates are symmetric structures.

[0020] Of course, in addition to the above embodiments, the present utility model can also have other various embodiments. Without departing from the essence of the technical solution of the present utility model, those skilled in the art can make various corresponding changes and deformations according to the present utility model. And if these changes or deformations are equivalent to the technical solutions in this patent, then these corresponding changes and deformations should all fall within the protection scope of the appended claims of the present utility model, and this utility model creation meets the actual R & D capabilities and resource conditions of the applicant.

Claims

1. A circuit breaker mechanism insulation protection structure, comprising a housing, the housing having a base, the base having a rotating shaft, characterized in that: The rotating shaft is provided with a retaining ring, and a partition is connected to the retaining ring. The partition includes a short side plate, a long side plate and a convex plate respectively connected to the short side plate and the long side plate. The base is provided with nesting grooves at the positions of the retaining rings on both sides of the rotating shaft. Both sides of the convex plate extend convex strips in a direction perpendicular to the short side plate and the long side plate, and the convex strips cooperate with the nesting grooves on the base.

2. The circuit breaker mechanism insulation protection structure according to claim 1, characterized in that: The short side plate of the partition is flush with one side of the convex plate, and the other side of the convex plate is connected to the long side plate with an inclined surface. The lower edge of the convex plate and the lower edges of the short side plate and the long side plate are formed with an arc groove, and the arc groove is semicircular. The lower ends of the short side plate and the long side plate are on the same horizontal plane, and the lower end of the convex plate is lower than the short side plate and the long side plate. The convex plate is located directly above the clamping ring, and both sides of the upper end of the long side plate extend outward to form a clamping portion, which is clamped in the upper edge area of ​​the nesting groove on the base.

3. The mechanical insulation protection structure of the circuit breaker according to claim 1 or 2, characterized in that: The shell also includes a middle cover and an upper cover, wherein the middle cover is arranged on the base, and the upper cover is arranged on the middle cover.

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