Vacuum circuit breaker

Abstract

The utility model provides a vacuum circuit breaker, and relates to the technical field of circuit breakers. The pole column is arranged on the mechanism box; the current transformer is arranged on one side of the mechanism box and one side of the pole, and one end of the current transformer is connected with the pole; one end of the isolation switch is fixedly connected to the mechanism box, the isolation switch comprises an isolation disconnecting link, and one end of the isolation disconnecting link is connected with the other end of the current transformer; the insulation sleeve comprises a first insulation sleeve and a second insulation sleeve, the first insulation sleeve is arranged between the current transformer and the pole, the second insulation sleeve is arranged between the current transformer and the isolation switch, a convex ring is arranged on the surface of at least one side of the insulation sleeve, and the convex ring is arranged on the surface of at least one side of the insulation sleeve. The insulation sleeve can effectively improve the stability and safety of the circuit breaker.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a vacuum circuit breaker. Background Art

[0002] When the vacuum circuit breaker is undergoing the power frequency withstand voltage test, discharge flickering may occur between the pole and the transformer, and between the transformer and the isolating switch. This phenomenon is not conducive to maintaining the stable operation of the circuit breaker and also poses a major safety hazard. Utility Model Content

[0003] The purpose of the utility model is to overcome the defects of the vacuum circuit breaker in the prior art and provide a vacuum circuit breaker that can effectively solve the problem of partial discharge flicker of the circuit breaker.

[0004] In order to achieve the above objectives and other objectives, the present invention is implemented by including the following technical solutions: The present invention provides a vacuum circuit breaker, which includes: a mechanism box; a pole, which is arranged on the mechanism box; a current transformer, which is arranged on one side of the mechanism box and the pole, and one end of the current transformer is connected to the pole; an isolating switch, one end of the isolating switch is fixed to the mechanism box, and the isolating switch includes an isolating knife switch, and one end of the isolating knife switch is connected to the other end of the current transformer; an insulating sleeve, which includes a first insulating sleeve and a second insulating sleeve, the first insulating sleeve is arranged at one end of the pole and between the current transformer and the pole, and the second insulating sleeve is arranged between the current transformer and the isolating knife switch, and a convex ring is provided on the surface of at least one side of the insulating sleeve.

[0005] The utility model provides a vacuum circuit breaker. Compared with the prior art, the utility model has the following beneficial effects: by adding a certain convex ring on the side of the insulating sleeve, the shielding tightness of the conductive rod connection can be improved, and the pole and the mutual inductor, as well as the mutual inductor and the isolating switch can be effectively insulated and isolated, thereby avoiding the phenomenon of partial discharge flickering of the circuit breaker and ensuring the stability and safety of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0007] Figure 1 Shown is a side view of the vacuum circuit breaker of the present invention.

[0008] Figure 2 It is shown as a structure schematic view of the vacuum circuit breaker of the utility model.

[0009] Figure 3 It is shown as a top view sectional view of the vacuum circuit breaker of the utility model.

[0010] Figure 4 It is shown as a side view of one side of the insulation sleeve of the utility model.

[0011] Figure 5 It is shown as a side view of the other side of the insulation sleeve of the utility model.

[0012] Figure 6 It is shown as a top view sectional view of the vacuum circuit breaker of the utility model. DETAILED DESCRIPTION

[0013] In order to make the skilled in the art better understand the technical scheme in the present application, the technical scheme in the embodiment of the present application will be described clearly and completely below, obviously, the described embodiment is only a part of the embodiment of the present application, not all the embodiment. Based on the embodiment in the present application, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of protection of the present application.

[0014] As Figures 1 to 6 shown, the utility model provides a kind of vacuum circuit breaker, and the vacuum circuit breaker includes mechanism box 1.The vacuum circuit breaker includes pole 2, and the pole 2 can be set in the top of mechanism box 1.

[0015] As Figure 2 And Figure 3 Shown, the vacuum circuit breaker includes current transformer 3, the bottom of current transformer 3 and mechanism box 1 are connected, and the top of current transformer 3 and pole 2 are connected.The current transformer 3 includes the top transformer body 31, the through hole 200 is arranged in the transformer body 31, the first accommodating cavity 311 close to the side of pole 2 and the second container cavity 312 close to the side of disconnecting switch 4 are arranged at both ends of through hole 200.The outer side wall of first accommodating cavity 311 and second accommodating cavity 312 is all provided with a plurality of second convex edges 313 of different diameters.

[0016] Specifically, the vacuum circuit breaker includes electrically conductive rod 100, the electrically conductive rod 100 can be partially arranged in the through hole 200, one end of the electrically conductive rod 100 is located in the pole 2, the other end of the electrically conductive rod 100 is located and extends from the current transformer 3, and the electrically conductive rod 100 can be electrically connected with the pole 2 and the current transformer 3.

[0017] As Figure 1 and Figure 3 As shown, the vacuum circuit breaker includes an isolating switch 4, one end of which is fixedly connected to the mechanism box 1. The isolating switch 4 includes an isolating switch 41, which is disposed on a support insulator 42 of the isolating switch 4. One end of the isolating switch 41 is connected to the current transformer 3, and specifically, the isolating switch 41 is connected to the conductive rod 100. The isolating switch 4 is conventional and will not be described in detail here.

[0018] like Figure 4 and Figure 5 As shown, the vacuum circuit breaker includes an insulating sleeve, which includes a first insulating sleeve 5 and a second insulating sleeve 6. The first insulating sleeve 5 is arranged between the current transformer 3 and the pole 2, and the second insulating sleeve 6 is arranged between the current transformer 3 and the isolating switch 41. A convex ring A is provided on the surface of at least one side of the insulating sleeve.

[0019] like Figure 3 As shown, the pole 2 includes a connection port 21, which can be set on the top of the pole 2 near the side of the current transformer body 31. One end of the conductive rod 100 is located in the connection port 21. The outer wall of the connection port 21 has a first ridge 211, and the first insulator 5 can be sleeved on the first ridge 211. Figure 4 and Figure 5 As shown, both sides of the first insulating sleeve 5 can be provided with convex rings A. The first insulating sleeve 5 includes a first ring body 51 and a second ring body 52 connected to the first ring body 51. The first ring body 51 and the second ring body 52 together form an inner cavity, and the inner cavity can be used for the connection port 21 of the pole 2 to be inserted. The first ring body 51 is arranged close to the pole 2, and the second ring body 52 is arranged close to the current transformer body 31. The inner cavities of the first ring body 51 and the second ring body 52 have stepped grooves 53, and the outer diameter of the first ring body 51 is larger than the outer diameter of the second ring body 52.

[0020] like Figure 6 As shown, the top of the connecting port 21 abuts against the bottom of the stepped groove 53 , and the convex ring A on the first ring body 51 abuts against the first convex edge 211 .

[0021] In some embodiments, the inner diameter of the first ring body 51 is greater than or equal to the outer diameter of the connecting port 21, and the inner diameter of the second ring body 52 is less than or equal to the outer diameter of the connecting port 21. The second ring body 52 is at least partially located in the first accommodating cavity 311, and the connecting tube 61 is at least partially located in the second accommodating cavity 312.

[0022] like Figure 4and Figure 5 As shown, the second insulating sleeve 6 includes a connecting tube 61 and a sleeve body 62 connected to the connecting tube 61. The connecting tube 61 can be sleeved on the conductive rod 100. The inner diameter of the connecting tube 61 can be less than or equal to the outer diameter of the conductive rod 100. The sleeve body 62 has a concave groove 63. The connecting tube 61 and the groove 63 are in communication and are connected to the center of the sleeve body 62.

[0023] like Figure 4 and Figure 5 As shown, the outer sidewall and outer bottom wall of the sleeve body 62 are provided with the protruding ring A, and the inner bottom wall of the groove 63 is also provided with a protruding ring A. The diameter of the protruding ring A on the inner bottom wall of the groove 63 is equal to the diameter of the protruding ring A on the outer bottom wall of the sleeve body 62. The second ridge 313 abuts against the protruding ring A on the outer bottom wall of the sleeve body 62.

[0024] It should be understood that the terms "height", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0026] Throughout this specification, reference to terms such as "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative descriptions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0027] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0028] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vacuum circuit breaker, characterized in that: The vacuum circuit breaker comprises: Mechanism box; A pole, the pole being arranged on the mechanism box; A current transformer is provided on one side of the mechanism box and the pole, and one end of the current transformer is connected to the pole; An isolating switch, one end of which is fixedly connected to the mechanism box, and the isolating switch includes an isolating knife switch, one end of which is connected to the other end of the current transformer; and an insulating sleeve, the insulating sleeve comprising a first insulating sleeve and a second insulating sleeve, the first insulating sleeve being arranged at one end of the pole and between the current transformer and the pole, the second insulating sleeve being arranged between the current transformer and the isolating switch, and a convex ring being arranged on at least one side surface of the insulating sleeve.

2. The vacuum circuit breaker according to claim 1, wherein: The pole is provided with a connection port at one end close to the current transformer, and a first convex edge is provided on the outer wall of the connection port. The first insulating sleeve is arranged on the first convex edge, and the convex ring of the first insulating sleeve on the surface of the side close to the connection port is in contact with the first convex edge.

3. The vacuum circuit breaker according to claim 2, characterized in that: The current transformer includes a transformer body having a through hole. Two ends of the through hole are provided with a first accommodating cavity close to the connecting port and a second accommodating cavity close to the isolating switch.

4. The vacuum circuit breaker according to claim 3, wherein: A conductive rod is provided in the through hole, and the conductive rod is connected to the connecting port and the isolation knife switch.

5. The vacuum circuit breaker according to claim 4, characterized in that: The second insulating sleeve includes a connecting pipe and a sleeve body connected to the connecting pipe, and the connecting pipe is sleeved on the conductive rod.

6. The vacuum circuit breaker according to claim 5, characterized in that: The first insulating sleeve includes a first ring body and a second ring body connected thereto, the first ring body and the second ring body together form an inner cavity, the first ring body is arranged close to the pole, and the second ring body is arranged close to the current transformer, the inner cavities of the first ring body and the second ring body have stepped grooves, and the top of the connecting port matches the stepped grooves.

7. The vacuum circuit breaker according to claim 6, characterized in that: The second ring body is at least partially located in the first accommodating cavity, and the connecting pipe is at least partially located in the second accommodating cavity.

8. The vacuum circuit breaker according to claim 5, characterized in that: A plurality of second protrusions with different diameters are provided on the outer side walls of the first accommodating cavity and the second accommodating cavity.

9. The vacuum circuit breaker according to claim 5, characterized in that: The sleeve body has a groove, and the isolation knife switch is at least partially located in the groove.

10. The vacuum circuit breaker according to claim 8, characterized in that: The second convex edge abuts against the convex ring on the outer bottom wall of the sleeve.

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