Circuit breaker pole

Abstract

The utility model provides a circuit breaker pole, which comprises an insulating shell, and a vacuum arc-extinguishing chamber, a current-conducting rod and a shielding net which are fixed in the insulating shell, a first end of the current-conducting rod is connected with the vacuum arc-extinguishing chamber, a second end of the current-conducting rod extends out of the insulating shell, and the shielding net is cylindrical and is arranged at the periphery of the current-conducting rod; the shielding net comprises a first barrel-shaped part and a second barrel-shaped part which are connected, the second barrel-shaped part is located on the periphery of the first end of the conductive rod, and the caliber of the second barrel-shaped part is larger than that of the first barrel-shaped part. And the compactness of the product is effectively maintained while the conductive rod and the connecting end part of the conductive rod and the vacuum arc-extinguishing chamber are effectively shielded.

Description

Technical Field

[0001] This utility model relates to a circuit breaker pole. Background Technology

[0002] Currently, vacuum circuit breakers have gained market recognition and are widely used due to their stable performance. A circuit breaker pole is formed by embedding the vacuum interrupter and related conductive parts of the circuit breaker into a solid insulating material, making the circuit breaker pole a single, integrated component.

[0003] CN213093123U discloses a solid-sealed pole and a circuit breaker using the solid-sealed pole, wherein the solid-sealed pole (i.e., the circuit breaker pole) has a shielding mesh around the copper rod. However, the shielding mesh of this product is far from the vacuum interrupter, and the connection point between the vacuum interrupter and the copper rod is not effectively shielded. Utility Model Content

[0004] Therefore, to solve the above problems, this utility model provides a circuit breaker pole.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A circuit breaker pole includes an insulating shell and a vacuum interrupter, a conductive rod, and a shielding mesh fixed inside the insulating shell. A first end of the conductive rod is connected to the vacuum interrupter, and a second end extends out of the insulating shell. The shielding mesh is cylindrical and disposed around the conductive rod. The shielding mesh includes a first cylindrical portion and a second cylindrical portion connected to each other. The second cylindrical portion is located around the first end of the conductive rod, and the diameter of the second cylindrical portion is larger than the diameter of the first cylindrical portion.

[0007] Furthermore, the first cylindrical part of the shielding mesh is a straight cylindrical structure with a uniform diameter.

[0008] Furthermore, the second cylindrical portion includes an arc-shaped extension portion connecting the first cylindrical portion and a straight cylindrical portion connecting the arc-shaped extension portion, wherein the arc-shaped extension portion has a trumpet-shaped structure with a gradually increasing diameter.

[0009] Furthermore, the outer diameter of the portion of the insulating shell corresponding to the first cylindrical portion is smaller than the outer diameter of the portion corresponding to the second cylindrical portion.

[0010] Furthermore, the outer periphery of the first cylindrical portion is provided with a connecting portion extending radially outward, and the end of the connecting portion is connected to a connecting terminal.

[0011] Furthermore, there are multiple connecting parts, which are evenly distributed on the outer periphery of the first cylindrical part, and each connecting part is connected to a connecting terminal at its end.

[0012] Furthermore, the outer periphery of the insulating shell is provided with a radially protruding mounting step portion, the mounting step portion having a step surface parallel to the end face of the insulating shell, and the connecting terminal is disposed within the mounting step portion and exposed on the step surface.

[0013] Furthermore, it also includes a high-voltage equalizing network, which is fixed inside the insulating shell and located around the end of the conductive rod connected to the vacuum interrupter.

[0014] Furthermore, the high-voltage equalizing network extends to the side of the vacuum interrupter, and the portion of the high-voltage equalizing network corresponding to the end corner of the vacuum interrupter is an arc-shaped portion, which forms an equielectric field region with the arc-shaped extension of the shielding network.

[0015] Furthermore, the insulating shell is integrally wrapped and fixed to the vacuum interrupter, conductive rod, and shielding mesh using a thermoplastic process.

[0016] The technical solution provided by this utility model has the following beneficial effects:

[0017] The shielding mesh is configured as a first cylindrical part and a second cylindrical part connected together. The second cylindrical part is located on the periphery of the first end of the conductive rod and provides shielding protection for the connection end between the conductive rod and the vacuum interrupter. Since the second cylindrical part is close to the vacuum interrupter, it needs to maintain a certain distance from the vacuum interrupter to ensure effective installation. The first cylindrical part is far away from the vacuum interrupter. The design of the second cylindrical part having a larger diameter than the first cylindrical part can reduce the outer diameter of the product at the location of the first cylindrical part, so that the overall volume of the product will not increase too much, effectively maintaining the compactness of the product and ensuring normal installation. Attached Figure Description

[0018] Figure 1 The image shown is a schematic diagram of the appearance of the circuit breaker pole in the embodiment;

[0019] Figure 2 The figure shown is a cross-sectional view of the circuit breaker pole in the embodiment;

[0020] Figure 3 The diagram shown is a partial structural exploded view of the circuit breaker pole in the embodiment.

[0021] Figure 4 The diagram shown is an exploded view of the circuit breaker poles after the insulating shell is hidden in the embodiment. Detailed Implementation

[0022] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0023] In the description of this invention, terms such as "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0025] Reference Figures 1 to 4 As shown, this embodiment provides a circuit breaker pole, including an insulating shell 10 and a vacuum interrupter 20, a conductive rod 30, and a shielding mesh 40 fixed inside the insulating shell 10. The first end of the conductive rod 30 is connected to the vacuum interrupter 20, and its second end extends out of the insulating shell 10. Specifically, the shielding mesh 40 is cylindrical and disposed around the conductive rod 30. The shielding mesh 40 includes a first cylindrical portion 41 and a second cylindrical portion 42 connected to each other. The second cylindrical portion 42 is located around the first end of the conductive rod 30. Figure 2 As shown, the first cylindrical portion 41 is away from the vacuum interrupter 20, while the second cylindrical portion 42 is close to the vacuum interrupter 20 to shield and protect the connection end between the conductive rod 30 and the vacuum interrupter 20. At the same time, the conductive rod 30 is a thin rod, and the radial dimension of the vacuum interrupter 20 is much larger than the conductive rod 30. The second cylindrical portion 42 needs to maintain a certain distance from the vacuum interrupter 20 to ensure the shielding effect. Therefore, the diameter of the second cylindrical portion 42 is set to be larger. The first cylindrical portion 41 is away from the vacuum interrupter 20 and only shields and protects the conductive rod 30. Therefore, in this embodiment, the diameter of the second cylindrical portion 42 is larger than the diameter of the first cylindrical portion 41. In this way, while ensuring effective shielding of the conductive rod 30 and the connection end between the conductive rod 30 and the vacuum interrupter 20, the outer diameter of the product at the location of the first cylindrical part 41 can be reduced. That is, in this embodiment, the outer diameter R1 of the portion of the insulating shell 10 corresponding to the first cylindrical part 41 is smaller than the outer diameter R2 of the portion corresponding to the second cylindrical part 42, so that the overall volume of the product (i.e. the size of the insulating shell) will not increase too much (compared to the structure disclosed in CN213093123U), effectively maintaining the compactness of the product and ensuring normal installation of the product.

[0026] The first cylindrical portion 41 of the shielding mesh 40 is a straight cylindrical structure with a constant diameter. The second cylindrical portion 42 includes an arc-shaped extension portion 421 connecting the first cylindrical portion 41 and a straight cylindrical portion 422 connecting the arc-shaped extension portion 421. The arc-shaped extension portion 421 has a trumpet-shaped structure with a gradually increasing diameter. In this way, the transition connection between the first cylindrical portion 41 and the second cylindrical portion 42 is achieved, and the shielding mesh 40 is prevented from experiencing tip discharge.

[0027] Furthermore, in this embodiment, the outer periphery of the first cylindrical portion 41 is provided with a radially outwardly extending connecting portion 43. The end of the connecting portion 43 is connected to a connecting terminal 44, which is used for connecting external components (such as the bracket cover plate of an external load switch) to achieve grounding, thereby improving the withstand voltage level of the circuit breaker pole. Furthermore, the number of connecting portions 43 is multiple; in this embodiment, there are four. The four connecting portions 43 are evenly distributed on the outer periphery of the first cylindrical portion 41, and the end of each connecting portion 43 is connected to a connecting terminal 44. Specifically, both the connecting portion 43 and the connecting terminal 44 are made of conductive material. Simultaneously, the outer periphery of the insulating shell 10 is provided with a radially protruding mounting step portion 12. The mounting step portion 12 has a step surface 121 parallel to the end face of the insulating shell 10. The connecting terminal 44 is disposed within the mounting step portion 12 and exposed on the step surface 121. The exposed portion of the connecting terminal 44 is used for connecting external components, while the other portions are covered by the insulating shell 10. Of course, other embodiments are not limited to this. For example, the number of connecting part 43 and connecting terminal 44 may be one or more, or the connecting part 43 and connecting terminal 44 may not be provided.

[0028] Furthermore, in this embodiment, the circuit breaker pole also includes a high-voltage equalizing network 50. The high-voltage equalizing network 50 is fixed inside the insulating shell 10 and located around the end of the vacuum interrupter 20 connected to the conductive rod 30. The high-voltage equalizing network 50 is located inside the second cylindrical portion 42 of the shielding mesh 40. The high-voltage equalizing network 50 enables the end of the vacuum interrupter 20 connected to the conductive rod 30 to achieve equalization and lightning protection effects, further ensuring safe use. Specifically, the high-voltage equalizing network 50 also extends to the side of the vacuum interrupter 20. The portion of the high-voltage equalizing network 50 corresponding to the corner of the vacuum interrupter 20 is an arc-shaped portion 51. This arc-shaped portion 51 and the arc-shaped extension portion 42 of the shielding mesh 40 form an equielectric field region, resulting in a uniform and reasonable electric field distribution and improving the insulation level of the product. Of course, in other embodiments, the high-voltage equalizing network 50 structure may not be used.

[0029] Furthermore, in this embodiment, the insulating shell 10 integrally covers and fixes the vacuum interrupter 20, conductive rod 30, shielding mesh 40, and high-voltage equalizing mesh 50 through a thermoplastic process. Directly fixed and molded via thermoplastic process, it boasts high manufacturing efficiency, good insulation, and virtually eliminates the risk of poor insulation due to assembly gaps; it is a commonly used connection structure in the prior art. Furthermore, the outer periphery of the insulating shell 10 is provided with multiple umbrella-shaped structures 11 to increase the creepage distance and further ensure safety.

[0030] The circuit breaker pole provided in this embodiment is very suitable for wind turbine lines in high-altitude areas.

[0031] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A circuit breaker pole, comprising an insulating shell and a vacuum interrupter, a conductive rod, and a shielding mesh fixed within the insulating shell, wherein a first end of the conductive rod is connected to the vacuum interrupter, and a second end extends out of the insulating shell, and the shielding mesh is cylindrical and disposed around the conductive rod; characterized in that: The shielding mesh includes a first cylindrical part and a second cylindrical part connected to each other. The second cylindrical part is located around the first end of the conductive rod, and the diameter of the second cylindrical part is larger than the diameter of the first cylindrical part.

2. The circuit breaker pole according to claim 1, characterized in that: The first cylindrical section of the shielding mesh is a straight cylindrical structure with a constant diameter.

3. The circuit breaker pole according to claim 1 or 2, characterized in that: The second cylindrical portion includes an arc-shaped extension portion connecting to the first cylindrical portion and a straight cylindrical portion connecting to the arc-shaped extension portion, wherein the arc-shaped extension portion has a trumpet-shaped structure with a gradually increasing diameter.

4. The circuit breaker pole according to claim 1, characterized in that: The outer diameter of the portion of the insulating shell corresponding to the first cylindrical part is smaller than the outer diameter of the portion corresponding to the second cylindrical part.

5. The circuit breaker pole according to claim 1, characterized in that: The outer periphery of the first cylindrical portion is provided with a connecting portion extending radially outward, and the end of the connecting portion is connected to a connecting terminal.

6. The circuit breaker pole according to claim 5, characterized in that: The number of connecting parts is multiple, and the multiple connecting parts are evenly distributed on the outer periphery of the first cylindrical part. Each connecting part is connected to a connecting terminal at its end.

7. The circuit breaker pole according to claim 5 or 6, characterized in that: The outer periphery of the insulating shell is provided with a radially protruding mounting step portion, the mounting step portion having a step surface parallel to the end face of the insulating shell, and the connecting terminal is disposed in the mounting step portion and exposed on the step surface.

8. The circuit breaker pole according to claim 3, characterized in that: It also includes a high-voltage equalizing network, which is fixed inside the insulating shell and located around the end of the conductive rod connected to the vacuum interrupter.

9. The circuit breaker pole according to claim 8, characterized in that: The high-voltage equalizing network extends to the side of the vacuum interrupter. The portion of the high-voltage equalizing network corresponding to the corner of the vacuum interrupter is an arc-shaped portion, and an equielectric field region is formed between this arc-shaped portion and the arc-shaped extension of the shielding network.

10. The circuit breaker pole according to claim 1, characterized in that: The insulating shell is integrally wrapped and fixed to the vacuum interrupter, conductive rod and shielding mesh by thermoplastic process.

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