Basin-type insulator and vacuum circuit breaker

Abstract

The invention relates to a basin-type insulator and a vacuum circuit breaker, the basin-type insulator comprises an insulator body, a first umbrella skirt and a second umbrella skirt, the insulator body is provided with a first side and a second side which are arranged oppositely, the insulator body is provided with an assembly hole, and the assembly hole penetrates through the first side and the second side; the at least two first umbrella skirts are arranged on the first side, and the at least two first umbrella skirts are arranged at intervals in the radial direction of the assembly hole; at least two second umbrella skirts are arranged on the second side, and the at least two second umbrella skirts are arranged at intervals in the radial direction of the assembly hole. Compared with the prior art, the basin-type insulator is provided with the first umbrella skirt and the second umbrella skirt, so that the creepage distance of the basin-type insulator is increased, the insulation strength of the basin-type insulator is improved, the partial discharge phenomenon is avoided, and the insulation safety and the operation reliability of the vacuum circuit breaker are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical equipment, and in particular to a basin-type insulator and a vacuum circuit breaker. BACKGROUND

[0002] The vacuum circuit breaker is widely used in power systems due to its high reliability, miniaturization and maintenance-free advantages. The vacuum arc-extinguishing chamber in the vacuum circuit breaker has a complex internal structure, many suspended potential components, and a diameter generally larger than that of an SF6 arc-extinguishing chamber of the same voltage level.

[0003] When a large-diameter vacuum arc-extinguishing chamber is integrated into a vacuum circuit breaker, in order to fix and match the vacuum arc-extinguishing chamber, the central through-hole diameter of the basin-type insulator also needs to be increased accordingly, which greatly reduces the effective surface distance of the insulating material of the body of the basin-type insulator, seriously weakening the surface insulation strength of the basin-type insulator, and easily causing partial discharge, affecting the insulation safety and operation reliability of the vacuum circuit breaker. SUMMARY

[0004] Therefore, it is necessary to provide a basin-type insulator and a vacuum circuit breaker to solve the problem of low insulation strength of the traditional basin-type insulator, which affects the insulation safety and operation reliability of the vacuum circuit breaker.

[0005] The technical scheme is as follows:

[0006] One embodiment provides a basin-type insulator, comprising:

[0007] An insulator body having a first side and a second side arranged opposite to each other, the insulator body being provided with an assembly hole penetrating through the first side and the second side;

[0008] A first shed arranged on the first side and provided with at least two, the at least two first sheds being arranged at intervals along the radial direction of the assembly hole; and

[0009] A second shed arranged on the second side and provided with at least two, the at least two second sheds being arranged at intervals along the radial direction of the assembly hole.

[0010] The pot-type insulator has an assembly hole penetrating through the first side and the second side of the insulator body for the electric conductor to pass through, at least two first umbrella skirts are arranged on the first side and spaced apart along the radial direction of the assembly hole, and at least two second umbrella skirts are arranged on the second side and spaced apart along the radial direction of the assembly hole, so as to make full use of the space of the first side and the second side of the insulator body, increase the creepage distance of the pot-type insulator, and further improve the insulation withstand voltage performance of the pot-type insulator; compared with the prior art, the pot-type insulator increases the creepage distance of the pot-type insulator by arranging the first umbrella skirts and the second umbrella skirts, improves the insulation strength of the pot-type insulator, avoids the occurrence of partial discharge, and improves the insulation safety and operation reliability of the vacuum circuit breaker.

[0011] In one of the embodiments, the at least two first umbrella skirts are arranged in a ring around the axial direction of the assembly hole, and the at least two second umbrella skirts are arranged in a ring around the axial direction of the assembly hole.

[0012] In one of the embodiments, the first umbrella skirt has a first connecting end portion and a first assembly end portion arranged oppositely, the first connecting end portion is connected with the first side, and the first assembly end portion is arranged to be matched with the opening of the arc extinguishing chamber; the distance between the first connecting end portion and the axial line of the assembly hole is D1, the distance between the first assembly end portion and the axial line of the assembly hole is D2, and D1>D2.

[0013] In one of the embodiments, the first umbrella skirt has a first connecting end portion and a first assembly end portion arranged oppositely, the first connecting end portion is connected with the first side, and the first assembly end portion is arranged to be matched with the opening of the arc extinguishing chamber; the distance between the first connecting end portion and the axial line of the assembly hole is D3, the distance between the first assembly end portion and the axial line of the assembly hole is D4, and D3<D4.

[0014] In one of the embodiments, in the radial direction of the assembly hole and away from the direction of the assembly hole, the distance between each first assembly end portion and the axial line of the assembly hole increases sequentially.

[0015] In one of the embodiments, the second umbrella skirt has a second connecting end portion and a second assembly end portion arranged oppositely, the second connecting end portion is connected with the second side, and the second assembly end portion is arranged to be matched with the opening of the arc extinguishing chamber; the distance between the second connecting end portion and the axial line of the assembly hole is D5, the distance between the second assembly end portion and the axial line of the assembly hole is D6, and D5>D6.

[0016] In one of the embodiments, the second umbrella skirt has a second connecting end and a second assembly end arranged oppositely, the second connecting end is connected with the second side, and the second assembly end is used to assemble with the opening of the arc extinguishing chamber. The distance between the second connecting end and the axis of the assembly hole is D7, and the distance between the second assembly end and the axis of the assembly hole is D8, D7 < D8.

[0017] In one of the embodiments, in the radial direction of the assembly hole and away from the assembly hole, the distance between each of the second assembly ends and the axis of the assembly hole increases successively.

[0018] In one of the embodiments, the insulator body has an assembly part with a convex side and a concave side arranged oppositely, and the assembly hole is arranged through the convex side and the concave side.

[0019] Another embodiment provides a vacuum circuit breaker, which comprises a vacuum arc extinguishing chamber, a conductive body, and a basin-type insulator as described above. The vacuum arc extinguishing chamber has a communicating opening and a mounting cavity, the basin-type insulator is arranged at the opening, and the conductive body is arranged through the assembly hole of the basin-type insulator and at least partially located in the mounting cavity.

[0020] The vacuum circuit breaker described above, the assembly hole penetrates the first side and the second side of the insulator body for the conductive body to pass through, at least two first umbrella skirts are arranged on the first side and spaced apart in the radial direction of the assembly hole, and at least two second umbrella skirts are arranged on the second side and spaced apart in the radial direction of the assembly hole, so as to make full use of the space of the first side and the second side of the insulator body, increase the creepage distance of the basin-type insulator, and improve the insulation withstand voltage performance of the basin-type insulator. Compared with the conventional technology, the vacuum circuit breaker described above increases the creepage distance of itself by arranging the first umbrella skirt and the second umbrella skirt, improves the insulation strength of the basin-type insulator, avoids the occurrence of partial discharge phenomenon, and improves the insulation safety and operation reliability of the vacuum circuit breaker. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 It is a whole structure schematic diagram of the basin-type insulator in an embodiment of the present application.

[0023] Figure 2 It is a sectional view of the basin-type insulator in an embodiment of the present application.

[0024] Figure 3 Fig. 1 is a schematic view of an overall structure of a pot-type insulator according to an embodiment of the present application.

[0025] Figure 4 Fig. 2 is a sectional view of the pot-type insulator according to the embodiment of the present application.

[0026] Figure 5 Fig. 3 is a sectional view of the pot-type insulator according to another embodiment of the present application.

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] 100, insulator body; 110, first side; 120, second side; 130, fitting portion; 131, fitting hole; 132, convex side; 133, concave side; 200, first shed; 210, first connecting end portion; 220, first fitting end portion; 300, second shed; 310, second connecting end portion; 320, second fitting end portion; 400, electrically conductive connecting ring. DETAILED DESCRIPTION

[0029] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and one of ordinary skill in the art can make similar improvements without departing from the spirit of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0030] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0031] In addition, if there are terms such as "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0032] In the present application, unless specifically defined otherwise, if there is an appearance of the terms "installation", "connection", "connection", "fixation" and the like, these terms should be interpreted in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In the present application, unless specifically defined otherwise, if there is a similar description of the first feature "on" or "under" the second feature, it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or it can only mean that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or it can only mean that the first feature is lower than the second feature in horizontal height.

[0034] It should be noted that if an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are for illustrative purposes only and do not represent the only implementation.

[0035] Please refer to Figures 1 to 5 One embodiment of the present application provides a basin type insulator, comprising an insulator body 100, a first shed 200 and a second shed 300, the insulator body 100 has a first side 110 and a second side 120 arranged opposite to each other, the insulator body 100 is provided with an assembly hole 131, the assembly hole 131 is arranged through the first side 110 and the second side 120; the first shed 200 is arranged on the first side 110 and is provided with at least two, the at least two first sheds 200 are arranged in a radial direction of the assembly hole 131; the second shed 300 is arranged on the second side 120 and is provided with at least two, the at least two second sheds 300 are arranged in a radial direction of the assembly hole 131.

[0036] The pot-type insulator, the assembly hole 131 penetrates the first side 110 and the second side 120 of the insulator body 100 for the electric conductor to pass through, the at least two first sheds 200 are arranged on the first side 110 and are radially spaced apart along the assembly hole 131, and the at least two second sheds 300 are arranged on the second side 120 and are radially spaced apart along the assembly hole 131, so as to make full use of the space of the first side 110 and the second side 120 of the insulator body 100, thereby increasing the creepage distance of the pot-type insulator and improving the insulation withstand voltage performance of the pot-type insulator; compared with the prior art, the pot-type insulator increases the creepage distance of the pot-type insulator by arranging the first sheds 200 and the second sheds 300, improves the insulation strength of the pot-type insulator, avoids the occurrence of partial discharge, and improves the insulation safety and operation reliability of the vacuum circuit breaker.

[0037] Please refer to Figure 1 and Figure 3 In one embodiment, the insulator body 100 is disc-shaped, one side of the disc-shaped insulator body 100 is the first side 110, the other side is the second side 120, the assembly hole 131 is arranged in the middle of the disc-shaped insulator body 100 for the electric conductor to pass through and realize the assembly of the pot-type insulator and the electric conductor, and the arrangement of the first sheds 200 and the second sheds 300 can increase the creepage distance of the pot-type insulator in the limited space of the insulator body 100, which can improve the withstand voltage performance of the vacuum circuit breaker when the pot-type insulator is assembled to the vacuum interrupter of the vacuum circuit breaker, thereby improving the overall insulation safety and operation reliability.

[0038] As an explanation, the number of the first sheds 200 arranged on the first side 110 is two or more, which can be flexibly selected according to the size of the insulator body 100 and the specific use scene, which is not limited here. Figure 2 and Figure 4 In the embodiment shown in the figure, the first sheds 200 are three and are radially spaced apart on the first side 110 along the assembly hole 131.

[0039] The second sheds 300 are similar to the first sheds 200, which will not be described here.

[0040] Please refer to Figures 1 to 5 In one embodiment, the at least two first sheds 200 are arranged around the axis of the assembly hole 131, and the at least two second sheds 300 are arranged around the axis of the assembly hole 131.

[0041] At least two first umbrella skirts 200 are arranged around the axial direction of the assembly hole 131, so as to maximize the creepage distance of the whole basin type insulator, in addition, the first umbrella skirt 200 arranged around can improve the maximum mechanical load that the basin type insulator can bear, when the insulator is subjected to external force such as tension, wind force, etc., the first umbrella skirt 200 arranged around can distribute stress to the whole circumference of the basin type insulator, so as to avoid local stress concentration and cracking; the second umbrella skirt 300 is similar to the first umbrella skirt 200, which will not be described here.

[0042] Further, please refer to Figure 1 and Figure 3 , the first umbrella skirt 200 and the second umbrella skirt 300 are annular, and the annular first umbrella skirt 200 and the annular second umbrella skirt 300 are coaxially arranged with the assembly hole 131.

[0043] Further, the inner diameters of different first umbrella skirts 200 are not the same, for example, Figure 1 and Figure 3 , the first umbrella skirt 200 is annular, and the inner diameter of each first umbrella skirt 200 gradually increases in the direction away from the assembly hole 131, so that the first umbrella skirts 200 can be arranged in each other, so as to fully utilize the space of the first side 110 of the insulator body 100; the second umbrella skirt 300 is similar to the first umbrella skirt 200, which will not be described here.

[0044] Please refer to Figure 1 and Figure 2 , in an embodiment, the first umbrella skirt 200 has a first connecting end portion 210 and a first assembly end portion 220 arranged oppositely, the first connecting end portion 210 is connected with the first side 110, and the first assembly end portion 220 is used for assembling with the opening of the arc extinguishing chamber, the distance between the first connecting end portion 210 and the axis of the assembly hole 131 is D1, the distance between the first assembly end portion 220 and the axis of the assembly hole 131 is D2, and D1>D2.

[0045] The distance between the first connecting end portion 210 of the first umbrella skirt 200 and the axis of the assembly hole 131 is greater than the distance between the first assembly end portion 220 and the axis of the assembly hole 131, so that at least part of the first umbrella skirt 200 is arranged at an angle with the plane where the first side 110 is located and is inclined, the first umbrella skirt 200 arranged obliquely can have a larger volume, so as to further increase the creepage distance of the basin type insulator and improve the insulation strength of the basin type insulator; and the first assembly end portion 220 can be assembled with the opening of the arc extinguishing chamber, so as to realize the assembly of the basin type insulator and the arc extinguishing chamber, the first umbrella skirt 200 can not only be used to improve the creepage distance of the basin type insulator, but also be used for the assembly with the arc extinguishing chamber, so as to improve the practicability of the basin type insulator.

[0046] Further, please refer to Figure 1 and Figure 2Since D1 > D2, the first assembly end 220 extends toward the axis of the assembly hole 131, and the first assembly end 220 is annular. The inner wall of the annular first assembly end 220 abuts against the outer wall of the arc-extinguishing chamber near the opening, so as to realize the assembly between the first umbrella skirt 200 and the arc-extinguishing chamber.

[0047] As an explanation, in Figure 1 and Figure 2 From the perspective shown, the first assembly end 220 is the upper part of the first umbrella skirt 200, and the first connecting end 210 is the lower part of the first umbrella skirt 200.

[0048] Please see Figure 3 and Figure 4 In one embodiment, the first umbrella skirt 200 has a first connecting end 210 and a first assembly end 220 disposed opposite to each other. The first connecting end 210 is connected to the first side 110, and the first assembly end 220 is used to assemble with the opening of the arc extinguishing chamber. The distance between the axis of the first connecting end 210 and the assembly hole 131 is set to D3, and the distance between the axis of the first assembly end 220 and the assembly hole 131 is set to D4, where D3 < D4.

[0049] The distance between the first connecting end 210 of the first umbrella skirt 200 and the axis of the mounting hole 131 is less than the distance between the first mounting end 220 and the axis of the mounting hole 131, so that at least a portion of the first umbrella skirt 200 is angled and inclined to the plane where the first side 110 is located. The inclined first umbrella skirt 200 can have a larger volume, thereby further increasing the creepage distance of the basin insulator and improving the insulation strength of the basin insulator. The first mounting end 220 can be combined with the opening of the arc-extinguishing chamber, thereby realizing the combination of the basin insulator and the arc-extinguishing chamber. The first umbrella skirt 200 can not only be used to increase the creepage distance of the basin insulator, but also to be used to combine with the arc-extinguishing chamber, thereby improving the practicality of the basin insulator.

[0050] Further, please refer to Figure 3 and Figure 4 Since D3 < D4, the first assembly end 220 extends in a direction away from the axis of the assembly hole 131, and the first assembly end 220 is annular. The outer wall of the annular first assembly end 220 abuts against the inner wall of the arc-extinguishing chamber near the opening, so as to realize the assembly between the first umbrella skirt 200 and the arc-extinguishing chamber.

[0051] Unlike the embodiments described above, in this embodiment, the first umbrella skirt 200 extends in a direction away from the axis of the mounting hole 131, while Figure 1 and Figure 2In the embodiment shown, the first umbrella skirt 200 extends toward the axis of the mounting hole 131. Both embodiments can increase the volume of the first umbrella skirt 200, only the direction of extension is different, which will not be described in detail here.

[0052] Further, please refer to Figures 1 to 5 All the first umbrella skirts 200 are arranged parallel to each other to make full use of the space on the first side 110 and improve the creepage distance of the basin insulator.

[0053] Please see Figure 2 , Figure 4 and Figure 5 In one embodiment, the distance between each first mounting end 220 and the axis of the mounting hole 131 increases sequentially in the radial direction of the mounting hole 131 and away from the mounting hole 131.

[0054] Please see Figure 2 In one embodiment, the second umbrella skirt 300 has a second connecting end 310 and a second assembly end 320 disposed opposite to each other. The second connecting end 310 is connected to the second side 120, and the second assembly end 320 is used to assemble with the opening of the arc extinguishing chamber. The distance between the axis of the second connecting end 310 and the assembly hole 131 is set to D5, and the distance between the axis of the second assembly end 320 and the assembly hole 131 is set to D6, where D5 > D6.

[0055] Please see Figure 4 In one embodiment, the second umbrella skirt 300 has a second connecting end 310 and a second assembly end 320 disposed opposite to each other. The second connecting end 310 is connected to the second side 120, and the second assembly end 320 is used to assemble with the opening of the arc extinguishing chamber. The distance between the axis of the second connecting end 310 and the assembly hole 131 is set to D7, and the distance between the axis of the second assembly end 320 and the assembly hole 131 is set to D8, where D7 < D8.

[0056] Please see Figures 1 to 5 In one embodiment, the distance between each second mounting end 320 and the axis of the mounting hole 131 increases sequentially in the radial direction of the mounting hole 131 and away from the mounting hole 131.

[0057] Similar to the first connecting end 210 and the first assembly end 220 of the first umbrella skirt 200, the second assembly end 320 can also be assembled with the opening of the arc-extinguishing chamber to realize the assembly between the basin insulator and the arc-extinguishing chamber.

[0058] This design not only allows the pot insulator to have a larger creepage distance, but also enables it to be adapted to a wider variety of arc-extinguishing chambers with openings of different diameters, thereby further improving the applicability of the pot insulator.

[0059] Furthermore, there are no specific restrictions on the number and orientation of the first skirt 200, or the number and orientation of the second skirt 300. For example, in Figure 5 In the illustrated embodiment, there are three first umbrella skirts 200, and the first mounting ends 220 of the three first umbrella skirts 200 are all arranged toward the axis of the mounting hole 131. There are two second umbrella skirts 300, and the second mounting ends 320 of the two second umbrella skirts 300 are all arranged toward the axial direction of the mounting hole 131. In other embodiments, there may be other numbers of first umbrella skirts 200 and second umbrella skirts 300, and their orientation may be adjusted to accommodate more arc-extinguishing chambers with openings of different diameters, thereby further improving the applicability of the pot insulator.

[0060] Please see Figure 5 In one embodiment, the first skirt 200 and the second skirt 300 have various thicknesses, thereby significantly increasing the creepage distance without affecting the mechanical strength of the basin insulator, effectively improving the insulation withstand voltage capability, and adapting to the insulation requirements of high voltage levels.

[0061] exist Figure 1 and Figure 2 In the illustrated embodiment, in the radial direction away from the mounting hole 131, the height of each first mounting end 220 increases sequentially, and the height of each second mounting end 320 increases sequentially; in Figure 3 and Figure 4 In the embodiment shown, the height of each first assembly end 220 decreases sequentially, and the height of each second assembly end 320 decreases sequentially.

[0062] Please see Figure 2 , Figure 4 and Figure 5 In some embodiments, the edges of the first assembly end 220 and the second assembly end 320 are both rounded, which helps to evenly distribute the surface electric field, prevent the creepage distance from failing due to structural abrupt changes, reduce the risk of partial discharge, and avoid electric field concentration at sharp corners or right angles, thereby greatly improving the withstand voltage performance and long-term operational reliability of the insulator.

[0063] Optionally, the spacing between the first umbrella skirts 200 can be consistent or inconsistent, and the spacing between the second umbrella skirts 300 can be consistent or inconsistent; no specific limitation is made here.

[0064] Please see Figures 1 to 5 In one embodiment, the insulator body 100 has an assembly portion 130, which has a protruding side 132 and a recessed side 133 disposed opposite to each other, and an assembly hole 131 is formed in the assembly portion 130 and extends through the protruding side 132 and the recessed side 133.

[0065] The assembly part 130 is provided with a protrusion on one side and a recess on the other side to increase the volume of the assembly part 130 and further improve the creepage distance of the pot insulator.

[0066] Please see Figures 1 to 5 In one embodiment, the basin-type insulator further includes a conductive connecting ring 400, the outer wall of which is disposed on the opening wall of the assembly hole 131, and the inner wall of which is used for the conductor to pass through.

[0067] Another embodiment provides a vacuum circuit breaker including a vacuum interrupter, a conductor, and a basin insulator as described above. The vacuum interrupter has a communicating opening and a mounting cavity. The basin insulator is disposed in the opening, and the conductor passes through the mounting hole 131 of the basin insulator and is at least partially located within the mounting cavity.

[0068] In the aforementioned vacuum circuit breaker, the mounting hole 131 penetrates the first side 110 and the second side 120 of the insulator body 100 for the passage of a conductor. At least two first sheds 200 are provided on the first side 110 and are arranged radially spaced along the mounting hole 131, and at least two second sheds 300 are provided on the second side 120 and are arranged radially spaced along the mounting hole 131. This fully utilizes the space of the first side 110 and the second side 120 of the insulator body 100, thereby increasing the creepage distance of the basin insulator and improving its insulation withstand voltage performance. Compared with conventional technology, the aforementioned vacuum circuit breaker increases its creepage distance by providing first sheds 200 and second sheds 300, improves the insulation strength of the basin insulator, avoids partial discharge, and improves the insulation safety and operational reliability of the vacuum circuit breaker.

[0069] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A pot insulator, characterized by The insulator comprises: an insulator body having a first side and a second side arranged oppositely, the insulator body being provided with an assembly hole penetrating through the first side and the second side; a first umbrella skirt arranged on the first side and provided with at least two first umbrella skirts arranged at intervals along the radial direction of the assembly hole; and a second umbrella skirt arranged on the second side and provided with at least two second umbrella skirts arranged at intervals along the radial direction of the assembly hole. The at least two first umbrella skirts are arranged circumferentially around the axial direction of the assembly hole, and the at least two second umbrella skirts are arranged circumferentially around the axial direction of the assembly hole.

2. The pot-type insulator according to claim 1, characterized by The first umbrella skirt has a first connecting end portion and a first assembly end portion arranged oppositely, the first connecting end portion is connected with the first side, and the first assembly end portion is used for assembling with the opening of the arc-extinguishing chamber, the distance between the first connecting end portion and the axis of the assembly hole is D1, the distance between the first assembly end portion and the axis of the assembly hole is D2, and D1>D2.

3. The pot-type insulator according to claim 1, characterized by The first umbrella skirt has a first connecting end portion and a first assembly end portion arranged oppositely, the first connecting end portion is connected with the first side, and the first assembly end portion is used for assembling with the opening of the arc-extinguishing chamber, the distance between the first connecting end portion and the axis of the assembly hole is D3, the distance between the first assembly end portion and the axis of the assembly hole is D4, and D3<D4.

4. The pot-type insulator according to claim 1, characterized by In the radial direction of the assembly hole and away from the assembly hole, the distance between each first assembly end portion and the axis of the assembly hole increases in sequence.

5. A pot insulator according to claim 3 or 4, characterised in that The second umbrella skirt has a second connecting end portion and a second assembly end portion arranged oppositely, the second connecting end portion is connected with the second side, and the second assembly end portion is used for assembling with the opening of the arc-extinguishing chamber, the distance between the second connecting end portion and the axis of the assembly hole is D5, the distance between the second assembly end portion and the axis of the assembly hole is D6, and D5>D6.

6. The pot-type insulator according to claim 1, wherein The second umbrella skirt has a second connecting end portion and a second assembly end portion arranged oppositely, the second connecting end portion is connected with the second side, and the second assembly end portion is used for assembling with the opening of the arc-extinguishing chamber, the distance between the second connecting end portion and the axis of the assembly hole is D7, the distance between the second assembly end portion and the axis of the assembly hole is D8, and D7<D8.

7. The pot-type insulator according to claim 1, wherein In the radial direction of the assembly hole and away from the assembly hole, the distance between each second assembly end portion and the axis of the assembly hole increases in sequence.

8. A pot insulator according to either claim 6 or claim 7, wherein, The insulator body has an assembly portion having a convex side and a concave side arranged oppositely, and the assembly hole is arranged in the assembly portion and penetrates through the convex side and the concave side.

9. The pot-type insulator according to claim 1, wherein The vacuum circuit breaker comprises a vacuum arc-extinguishing chamber, a conductor and a basin-type insulator according to any one of claims 1-9, the vacuum arc-extinguishing chamber has an opening and a mounting cavity connected with each other, the basin-type insulator is arranged at the opening, and the conductor is arranged in the assembly hole of the basin-type insulator and at least partially located in the mounting cavity.

10. A vacuum interrupter, characterized by, ​

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