Solid-sealed polar pole with long service life

Abstract

The invention provides a long-life solid-sealed polar pole which comprises a vacuum arc-extinguishing chamber, a static end leading-out seat and a moving end leading-out seat, the static end leading-out seat is connected with a static end conducting rod of the vacuum arc-extinguishing chamber, and the moving end leading-out seat is connected with a moving end conducting rod of the vacuum arc-extinguishing chamber; the moving end lead-out seat comprises a fixed conductive seat, a conductive shaft sleeve, a spring contact finger and a watchband contact finger, the fixed conductive seat is fixedly arranged and is provided with a mounting hole, the aperture of the mounting hole is larger than the outer diameter of the conductive shaft sleeve, the conductive shaft sleeve is assembled in the mounting hole of the fixed conductive seat and is limited in the axial direction, and the watchband contact finger is arranged on the conductive shaft sleeve. The periphery of the conductive shaft sleeve is connected with the fixed conductive seat through the spring contact finger, and the moving end conductive rod penetrates into a center hole of the conductive shaft sleeve and is connected with the conductive shaft sleeve through the watchband contact finger. The solid-sealed polar pole with long service life and stable action is realized through simple structural design.

Description

Technical Field

[0001] The invention relates to the field of solid-sealed poles, and in particular to a solid-sealed pole with a long service life. Background Art

[0002] At present, vacuum circuit breakers have been recognized by the market for their stable performance and have been widely used. The solid-sealed pole is formed by embedding the vacuum interrupter and the conductive parts related to the circuit breaker into solid insulating materials at the same time to form a pole, making the solid-sealed pole an integral component. That is, the solid-sealed pole is composed of the moving end outlet seat, vacuum interrupter, static end outlet seat and other accessories cast by epoxy resin or other thermoplastic materials.

[0003] An electrical connection needs to be formed between the moving end outlet seat of the sealed pole and the moving end conductive rod of the vacuum arc chamber. At the same time, the moving end conductive rod is externally connected to an insulating pull rod to perform the opening and closing action. At present, the moving end outlet seat and the moving end conductive rod of the vacuum arc chamber are connected by a soft connection or a sliding connection. Among them, the sliding connection is generally connected by a spring contact finger or a strap contact finger, and the connection method relies on elastic compression of the spring contact finger or the strap contact finger to achieve sliding friction along the opening and closing action direction of the moving end conductive rod. However, each has its own disadvantages. For example, the spring contact finger has a large deformation amount, but the deformation along the opening and closing action direction of the moving end conductive rod causes easy wear; and the strap contact finger needs to control the concentricity to achieve wear-resistant characteristics, that is, to prevent eccentric wear (wear on one side), a higher concentricity is required. At present, there is no solution that can achieve both long life and stable action of the sealed pole. Summary of the invention

[0004] Therefore, the present invention provides a long-life solid-sealed pole to solve the above problems.

[0005] To achieve the above purpose, the technical solution provided by the present invention is as follows:

[0006] A long-life solid-sealed pole comprises a vacuum arc chamber, a static end lead-out seat and a dynamic end lead-out seat, wherein the static end lead-out seat is connected to the static end conductive rod of the vacuum arc chamber, and the dynamic end lead-out seat is connected to the dynamic end conductive rod of the vacuum arc chamber; the movable direction of the dynamic end conductive rod is defined as the axial direction, and the direction perpendicular to the axial direction is the radial direction; the dynamic end lead-out seat comprises a fixed conductive seat, a conductive shaft sleeve, a spring contact finger and a strap contact finger; the fixed conductive seat is fixedly arranged and has a mounting hole, the aperture of the mounting hole is larger than the outer diameter of the conductive shaft sleeve, the conductive shaft sleeve is fitted in the mounting hole of the fixed conductive seat and is restricted in the axial direction, the outer periphery of the conductive shaft sleeve is connected to the fixed conductive seat through the spring contact finger, the dynamic end conductive rod penetrates into the central hole of the conductive shaft sleeve and is connected to the conductive shaft sleeve through the strap contact finger.

[0007] Furthermore, the number of the spring contact fingers is at least two, and they are spaced apart and distributed along the axial direction of the conductive sleeve.

[0008] Furthermore, an annular mounting groove is provided on the outer periphery of the conductive sleeve, and the spring contact finger is assembled in the annular mounting groove.

[0009] Furthermore, the fixed conductive seat extends radially inward at one end of the mounting hole away from the vacuum arc extinguishing chamber to form an abutment portion, and the conductive sleeve is restricted in the axial direction by being restricted between the abutment portion and the vacuum arc extinguishing chamber.

[0010] Furthermore, the vacuum interrupter chamber has a moving end cover, the fixed conductive seat is assembled on the moving end cover, and the conductive sleeve is confined between the abutment portion and the moving end cover.

[0011] Furthermore, a guide hole is provided on the movable end cover, and the movable end conductive rod is inserted into the guide hole of the movable end cover to achieve guidance.

[0012] Furthermore, an annular positioning groove is provided on the movable end cover, and a positioning convex ring is provided on the fixed conductive seat. The positioning convex ring of the fixed conductive seat cooperates with the annular positioning groove of the movable end cover to achieve positioning assembly.

[0013] Furthermore, it also includes an insulating shell, which integrally covers and fixes the vacuum arc extinguishing chamber, the static end lead-out seat and the fixed conductive seat.

[0014] Furthermore, an umbrella skirt structure is provided on the outer periphery of the insulating shell.

[0015] Furthermore, the number of the strap contact fingers is at least two, and they are spaced apart and distributed along the axial direction of the movable end conductive rod.

[0016] The technical solution provided by the present invention has the following beneficial effects:

[0017] For the structural design of the moving end outlet seat, the conductive sleeve is set in the mounting hole of the fixed conductive seat and restricted in the axial direction. The outer periphery of the conductive sleeve is connected to the fixed conductive seat through the spring contact finger to achieve radial concentricity adjustment. Since the axial direction of the conductive sleeve is restricted, the spring contact finger is not easy to wear; at the same time, the setting of the spring contact finger makes the tolerance of concentricity larger. The conductive sleeve is connected to the moving end conductive rod through the strap contact finger, which is wear-resistant and ensures service life. In this way, a solid-sealed pole with long life and stable action is realized through a simple structural design. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure shows a cross-sectional view of a long-life solid-sealed pole in an embodiment;

[0019] Figure 2 Shown Figure 1 A magnified schematic diagram of the middle A area;

[0020] Figure 3 The figure shows a schematic diagram of the structural decomposition of a long-life solid-sealed pole in an embodiment;

[0021] Figure 4 The figure shows a schematic diagram of the structure of the moving end cover in the embodiment;

[0022] Figure 5 Shown is a schematic structural diagram of a fixed conductive seat in an embodiment. DETAILED DESCRIPTION

[0023] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which 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 contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0024] In the description of the present invention, terms such as "up", "down", "left", "right", "front", "back", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying 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 of the present invention.

[0025] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0026] Reference Figures 1 to 5 As shown, this embodiment provides a long-life solid-sealed pole, including a vacuum arc chamber 10, a static end lead-out seat 30 and a dynamic end lead-out seat 20, wherein the static end lead-out seat 30 is connected to the static end conductive rod of the vacuum arc chamber 10, and the dynamic end lead-out seat 20 is connected to the dynamic end conductive rod 11 of the vacuum arc chamber 10; specifically, the vacuum arc chamber 10 includes a porcelain shell, the static end conductive rod, the dynamic end conductive rod 11, a moving contact and a static contact, the moving contact and the static contact are arranged opposite to each other and located in the porcelain shell, the static end conductive rod is connected to the static contact, the dynamic end conductive rod 11 is connected to the moving contact, the dynamic end conductive rod 11 is externally connected to an insulating pull rod, and the moving contact is driven by the insulating pull rod to perform opening and closing actions. The moving direction of the dynamic end conductive rod 11 is defined as the axial direction, and the direction perpendicular to the axial direction is defined as the radial direction, such as Figure 1 and Figure 2As shown, the vertical direction is the axial direction, and the horizontal direction is the radial direction. The movable end lead-out seat 20 includes a fixed conductive seat 21, a conductive sleeve 22, a spring contact finger 23 and a strap contact finger 24. The fixed conductive seat 21 is fixedly arranged and has a mounting hole 211. The diameter of the mounting hole 211 is larger than the outer diameter of the conductive sleeve 22. The conductive sleeve 22 is assembled in the mounting hole 211 of the fixed conductive seat 21 and is restricted in the axial direction. The outer periphery of the conductive sleeve 22 is connected to the fixed conductive seat 21 through the spring contact finger 23. The concentricity adjustment in the radial direction is achieved through the deformation of the spring contact finger 23 in the radial direction. Since the conductive sleeve 22 is restricted in the axial direction and can only move in the radial direction, the spring contact finger 23 is not easy to wear; and the setting of the spring contact finger 23 makes the tolerance of the concentricity larger; even if there is a large position deviation between the center hole 222 of the conductive sleeve 22 and the movable end conductive rod 11, it can be adjusted through the deformation of the spring contact finger 23 in the radial direction. The movable end conductive rod 11 is inserted into the central hole 222 of the conductive sleeve 22 and connected to the conductive sleeve 22 through the strap contact finger 24. The arrangement of the spring contact finger 23 and the conductive sleeve 22 effectively ensures the concentricity of the product installation. On this basis, the conductive sleeve 22 and the movable end conductive rod 11 are connected through the strap contact finger 24 to achieve the effect of both long life and stable operation.

[0027] Further, the number of the spring contact fingers 23 is preferably at least two, and in this embodiment, there are two, and they are spaced apart along the axial direction of the conductive sleeve 22 to ensure the assembly stability of the conductive sleeve 22. Of course, in other embodiments, the number of the spring contact fingers 23 is not limited thereto, and may also be one, or more than two.

[0028] Specifically, an annular mounting groove 221 is provided on the outer periphery of the conductive sleeve 22 , and the spring contact finger 23 is assembled in the annular mounting groove 221 , so that the annular mounting groove 221 is positioned and assembled, and is not easily offset.

[0029] Furthermore, the number of the strap contact fingers 24 is at least two, and in this embodiment, there are two, and they are spaced apart along the axial direction of the movable end conductive rod 11 to ensure the assembly stability of the conductive sleeve 22 and the movable end conductive rod 11. Of course, in other embodiments, the number of the strap contact fingers 24 is not limited thereto, and may also be one, or more than two.

[0030] Furthermore, in this embodiment, the structure in which the conductive sleeve 22 is axially restricted is as follows: the fixed conductive seat 21 extends radially inward at one end (defined as the first end) of the mounting hole 211 away from the vacuum arc chamber 10 to form an abutment portion 212, and the conductive sleeve 22 is restricted between the abutment portion 212 and the vacuum arc chamber 10 and is restricted in the axial direction; in this way, when assembling, the conductive sleeve 22 with the spring contact finger 23 can be inserted from the second end opening of the fixed conductive seat 21, and then the second end of the fixed conductive seat 21 is matched on the vacuum arc chamber 10, so that the limited assembly of the conductive sleeve 22 is realized; the assembly is simple. Of course, in other embodiments, the conductive sleeve 22 can also be axially restricted by fixing other limiting structures on the fixed conductive seat 21.

[0031] Specifically, the vacuum interrupter 10 further comprises a movable end cover 12, the movable end conductive rod 11 is passed through the movable end cover 12, the fixed conductive seat 21 is assembled on the movable end cover 12, and the conductive sleeve 22 is restricted between the abutment portion 212 and the movable end cover 12. Further, an annular positioning groove 122 is provided on the movable end cover 12, and a positioning convex ring 213 is provided on the fixed conductive seat 21. The positioning convex ring 213 of the fixed conductive seat 21 is matched with the annular positioning groove 122 of the movable end cover 12 to realize positioning and assembly, and the assembly precision is good, which is conducive to ensuring the concentricity of the conductive sleeve 22 and the movable end conductive rod 11. At the same time, a guide hole 121 is provided on the movable end cover 12, and the movable end conductive rod 11 is inserted into the guide hole 121 of the movable end cover 12 to achieve guidance, thereby ensuring that the movable end conductive rod 11 does not deviate during movement, and further ensuring the concentricity of the conductive sleeve 22 and the movable end conductive rod 11. The setting of the movable end cover 12, as well as the positioning and coordination with the fixed conductive seat 21 and the movable end conductive rod 11, further ensure the concentricity of the conductive sleeve 22 and the movable end conductive rod 11, and better guarantee the service life and stable operation of the sealed pole. Of course, in other embodiments, the assembly of the vacuum arc chamber 10 and the fixed conductive seat 21 is not limited to this, such as the structure of the movable end cover 12 may not be adopted, such as the fixed conductive seat 21 is directly assembled on the porcelain shell of the vacuum arc chamber 10, etc.

[0032] The sealed pole further includes an insulating shell 40, which integrally covers and fixes the vacuum interrupter 10, the static end lead-out seat 30 and the fixed conductive seat 21; for example, the insulating shell 40 is formed by pouring epoxy resin or other thermoplastic materials on the vacuum interrupter 10, the static end lead-out seat 30 and the fixed conductive seat 21 to form a connection. Specifically, an umbrella skirt structure 41 is provided on the periphery of the insulating shell 40 to increase the creepage distance and ensure the safety of electricity use.

[0033] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A long-life solid-sealed pole, comprising a vacuum interrupter, a static end lead-out seat and a dynamic end lead-out seat, wherein the static end lead-out seat is connected to the static end conductive rod of the vacuum interrupter, and the dynamic end lead-out seat is connected to the dynamic end conductive rod of the vacuum interrupter; the movable direction of the dynamic end conductive rod is defined as the axial direction, and the direction perpendicular to the axial direction is the radial direction, and is characterized in that: The movable end lead-out seat comprises a fixed conductive seat, a conductive sleeve, a spring contact finger and a strap contact finger. The fixed conductive seat is fixedly arranged and has a mounting hole. The aperture of the mounting hole is larger than the outer diameter of the conductive sleeve. The conductive sleeve is fitted into the mounting hole of the fixed conductive seat and is restricted in the axial direction. The outer periphery of the conductive sleeve is connected to the fixed conductive seat through the spring contact finger. The movable end conductive rod penetrates into the central hole of the conductive sleeve and is connected to the conductive sleeve through the strap contact finger.

2. The long-life solid-sealed pole according to claim 1, characterized in that: The number of the spring contact fingers is at least two, and they are spaced apart and distributed along the axial direction of the conductive sleeve.

3. The long-life solid-sealed pole according to claim 1 or 2, characterized in that: The outer periphery of the conductive sleeve is provided with an annular mounting groove, and the spring contact finger is assembled in the annular mounting groove.

4. The long-life solid-sealed pole according to claim 1, characterized in that: The fixed conductive seat extends radially inward at one end of the mounting hole away from the vacuum arc extinguishing chamber to form an abutment portion, and the conductive sleeve is restricted in the axial direction by being restricted between the abutment portion and the vacuum arc extinguishing chamber.

5. The long-life solid-sealed pole according to claim 4, characterized in that: The vacuum interrupter chamber has a movable end cover, the fixed conductive seat is assembled on the movable end cover, and the conductive sleeve is restricted between the abutting portion and the movable end cover.

6. The long-life solid-sealed pole according to claim 5, characterized in that: The movable end cover is provided with a guide hole, and the movable end conductive rod is inserted into the guide hole of the movable end cover to achieve guidance.

7. The long-life solid-sealed pole according to claim 5 or 6, characterized in that: The movable end cover is provided with an annular positioning groove, and the fixed conductive seat is provided with a positioning convex ring. The positioning convex ring of the fixed conductive seat is matched in the annular positioning groove of the movable end cover to realize positioning and assembly.

8. The long-life solid-sealed pole according to claim 1, characterized in that: It also includes an insulating shell, which integrally covers and fixes the vacuum arc extinguishing chamber, the static end lead-out seat and the fixed conductive seat.

9. The long-life solid-sealed pole according to claim 8, characterized in that: An umbrella skirt structure is arranged on the outer periphery of the insulating shell.

10. The long-life solid-sealed pole according to claim 1, characterized in that: The number of the strap contact fingers is at least two, and they are spaced apart and distributed along the axial direction of the movable end conductive rod.

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