Solid-sealed polar pole with long service life
By combining the conductive bushing with the spring contact finger and the watch strap contact finger, the problem of easy wear at the connection between the moving end outlet and the vacuum interrupter of the solid-sealed pole is solved, achieving the effect of long service life and stable operation.
Patent Information
- Application Number
- CN202520137164.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2035-01-21
AI Technical Summary
Existing solid-sealed poles are prone to wear at the connection between the moving end outlet and the moving end conductive rod of the vacuum interrupter, and it is difficult to achieve both long service life and stable operation.
The combination of conductive bushing, spring contact finger, and watch strap contact finger creates a stable connection. The conductive bushing is restricted in the axial direction, and the concentricity is adjusted by the deformation of the spring contact finger in the radial direction. The watch strap contact finger is wear-resistant.
This improves the service life and operational stability of the solid-sealed terminals, reduces wear, ensures concentricity tolerance, and extends the product's service life.
Smart Images
Figure CN223815730U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of solid seal pole, specifically relates to a long life solid seal pole. BACKGROUND
[0002] At present, vacuum circuit breaker is recognized by the market for its stable performance and has been widely applied. The solid seal pole is formed by embedding the vacuum arc-extinguishing chamber and the conductive parts related to the circuit breaker into the solid insulation material to form a pole, so that the solid seal pole becomes an integral component. That is, the solid seal pole is formed by pouring the dynamic end outlet seat, the vacuum arc-extinguishing chamber, the static end outlet seat and other accessories with epoxy resin or other thermoplastic materials.
[0003] The dynamic end outlet seat of the solid seal pole needs to be electrically connected with the dynamic end conductive rod of the vacuum arc-extinguishing chamber, and meanwhile, the dynamic end conductive rod is externally connected with the insulation pull rod to perform the opening and closing actions. At present, the dynamic end outlet seat and the dynamic end conductive rod of the vacuum arc-extinguishing chamber are connected through soft connection or sliding connection. The sliding connection generally adopts spring contact fingers or watchband contact fingers for connection, and the connection mode is to realize the sliding friction along the opening and closing action direction of the dynamic end conductive rod by the elastic compression of the spring contact fingers or the watchband contact fingers. However, each has its own shortcomings, such as the spring contact fingers have a large deformation amount, but the deformation along the opening and closing action direction of the dynamic end conductive rod leads to easy wear; and the watchband contact fingers need to control the concentricity to prevent eccentric wear (wear to one side), which requires a high concentricity. At present, there is no scheme that can realize the long service life and stable action of the solid seal pole. SUMMARY
[0004] Therefore, the utility model provides a long life solid seal pole to solve the above problems.
[0005] To achieve the above purpose, the utility model provides the technical scheme as follows:
[0006] A long life solid seal pole, comprising a vacuum arc-extinguishing chamber, a static end lead-out seat and a dynamic end lead-out seat, the static end lead-out seat is connected with the static end conductive rod of the vacuum arc-extinguishing chamber, and the dynamic end lead-out seat is connected with the dynamic end conductive rod of the vacuum arc-extinguishing chamber; the activity 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, spring contact fingers and watchband contact fingers, the fixed conductive seat is fixedly arranged and has a mounting hole, the hole diameter 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, the outer periphery of the conductive shaft sleeve is connected with the fixed conductive seat through the spring contact fingers, and the dynamic end conductive rod penetrates into the center hole of the conductive shaft sleeve and is connected with the conductive shaft sleeve through the watchband contact fingers.
[0007] Further, the number of spring contact fingers is at least two, and the spring contact fingers are distributed along the axial direction of the conductive sleeve.
[0008] Further, the outer periphery of the conductive sleeve is provided with an annular mounting groove, and the spring contact fingers are assembled in the annular mounting groove.
[0009] Further, the fixed conductive seat extends radially inward at the end of the mounting hole away from the vacuum interrupter to form an abutting portion, and the conductive sleeve is limited between the abutting portion and the vacuum interrupter in the axial direction.
[0010] Further, the vacuum interrupter has a moving end cover, the fixed conductive seat is assembled on the moving end cover, and the conductive sleeve is limited between the abutting portion and the moving end cover.
[0011] Further, the moving end cover is provided with a guide hole, and the moving end conductive rod is arranged in the guide hole of the moving end cover to realize guidance.
[0012] Further, the moving end cover is provided with an annular positioning groove, the fixed conductive seat is provided with a positioning convex ring, and the positioning convex ring of the fixed conductive seat is matched in the annular positioning groove of the moving end cover to realize positioning assembly.
[0013] Further, the insulation shell integrally covers and fixes the vacuum interrupter, the static end lead-out seat and the fixed conductive seat.
[0014] Further, the outer periphery of the insulation shell is provided with an umbrella skirt structure.
[0015] Further, the number of watchband contact fingers is at least two, and the watchband contact fingers are distributed along the axial direction of the moving end conductive rod.
[0016] The technical scheme provided by the utility model has the following beneficial effects:
[0017] For the structure design of the moving end lead-out seat, the conductive sleeve is arranged in the mounting hole of the fixed conductive seat and is limited in the axial direction, the outer periphery of the conductive sleeve and the fixed conductive seat are connected through the spring contact fingers, the concentricity adjustment in the radial direction is realized, the conductive sleeve is not easy to wear the spring contact fingers due to the limitation in the axial direction, meanwhile, the spring contact fingers make the tolerance allowance of the concentricity larger. The conductive sleeve and the moving end conductive rod are connected through the watchband contact fingers, the watchband contact fingers are wear-resistant, and the service life is guaranteed. In this way, the fixed sealing pole with long service life and stable action is realized through simple structure design. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 The cross-sectional view of the fixed sealing pole with long service life in the embodiment is shown.
[0019] Figure 2 shown is Figure 1 an enlarged schematic view of the A region in the middle;
[0020] Figure 3 shown is a structural exploded schematic view of the long-life solid-sealed pole in the embodiment;
[0021] Figure 4 shown is a structural schematic view of the moving end cover in the embodiment;
[0022] Figure 5 shown is a structural schematic view of the fixed conductive seat in the embodiment. DETAILED DESCRIPTION
[0023] To further illustrate the embodiments, the utility model provides the drawings. These drawings are part of the utility model disclosure, which mainly serves to illustrate the embodiments, and can be combined with the relevant description of the specification to explain the operating principle of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementations and the advantages of the utility model. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.
[0024] In the description of the utility model, the terms "upper", "lower", "left", "right", "front", "back" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, which is only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the utility model.
[0025] The utility model will be further described in conjunction with the drawings and specific embodiments.
[0026] Referring to Figures 1 to 5 shown, the embodiment provides a long-life solid-sealed pole, which comprises a vacuum interrupter 10, a static end lead-out seat 30 and a moving end lead-out seat 20, the static end lead-out seat 30 is connected with the static end conductive rod of the vacuum interrupter 10, and the moving end lead-out seat 20 is connected with the moving end conductive rod 11 of the vacuum interrupter 10; specifically, the vacuum interrupter 10 comprises a porcelain shell, the static end conductive rod, the moving end conductive rod 11, a moving contact and a static contact, the moving contact and the static contact are oppositely arranged and located in the porcelain shell, the static end conductive rod is connected with the static contact, the moving end conductive rod 11 is connected with the moving contact, and the moving end conductive rod 11 is connected with an insulating pull rod, and the moving contact is driven to perform opening and closing actions under the drive of the insulating pull rod. The moving direction of the moving end conductive rod 11 is defined as the axial direction, and the direction perpendicular to the axial direction is 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 terminal lead-out seat 20 comprises a fixed conductive seat 21, a conductive sleeve 22, spring contact fingers 23, and watchband contact fingers 24. The fixed conductive seat 21 is fixedly arranged and has a mounting hole 211. The mounting hole 211 has a hole diameter 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 limited in the axial direction. The outer periphery of the conductive sleeve 22 is connected with the fixed conductive seat 21 through the spring contact fingers 23. The concentricity adjustment in the radial direction is realized through the deformation of the spring contact fingers 23 in the radial direction. Since the axial direction of the conductive sleeve 22 is limited, the spring contact fingers 23 are not easy to wear. The setting of the spring contact fingers 23 makes the tolerance of the concentricity larger. Even if there is a large positional deviation between the center hole 222 of the conductive sleeve 22 and the movable terminal conductive rod 11, the deviation can be adjusted through the deformation of the spring contact fingers 23 in the radial direction. The movable terminal conductive rod 11 penetrates into the center hole 222 of the conductive sleeve 22 and is connected with the conductive sleeve 22 through the watchband contact fingers 24. Through the setting of the spring contact fingers 23 and the conductive sleeve 22, the concentricity of the product installation is effectively ensured. On this basis, the conductive sleeve 22 and the movable terminal conductive rod 11 are connected through the watchband contact fingers 24, so as to achieve the effects of long service life and stable action.
[0027] Further, the number of the spring contact fingers 23 is preferably at least two, which is two in the embodiment and is distributed along the axial direction of the conductive sleeve 22, so as 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 to this, and can be one or more than two.
[0028] Specifically, the outer periphery of the conductive sleeve 22 is provided with an annular mounting groove 221, and the spring contact fingers 23 are assembled in the annular mounting groove 221, so as to realize the positioning assembly of the annular mounting groove 221 and prevent the annular mounting groove 221 from being deviated.
[0029] Further, the number of the watchband contact fingers 24 is at least two, which is two in the embodiment and is distributed along the axial direction of the movable terminal conductive rod 11, so as to ensure the assembly stability of the conductive sleeve 22 and the movable terminal conductive rod 11. Of course, in other embodiments, the number of the watchband contact fingers 24 is not limited to this, and can be one or more than two.
[0030] Further, in the embodiment, the structure for axially limiting the conductive sleeve 22 is that the fixed conductive seat 21 extends radially inward at the end (defined as the first end) of the mounting hole 211 away from the vacuum interrupter 10 to form an abutting portion 212, and the conductive sleeve 22 is limited between the abutting portion 212 and the vacuum interrupter 10 to be limited 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 fitted on the vacuum interrupter 10, so that the limiting assembly of the conductive sleeve 22 is realized; the assembly is simple. Of course, in other embodiments, other limiting structures can be fixed on the fixed conductive seat 21 to axially limit the conductive sleeve 22.
[0031] Specifically, the vacuum interrupter 10 further has a moving end cover 12, the moving end conductive rod 11 passes through the moving end cover 12, the fixed conductive seat 21 is assembled on the moving end cover 12, and the conductive sleeve 22 is limited between the abutting portion 212 and the moving end cover 12. Further, the moving end cover 12 is provided with an annular positioning groove 122, the fixed conductive seat 21 is provided with a positioning convex ring 213, the positioning convex ring 213 of the fixed conductive seat 21 is fitted in the annular positioning groove 122 of the moving end cover 12 to realize positioning assembly, the assembly precision is good, and it is beneficial to ensure the concentricity of the conductive sleeve 22 and the moving end conductive rod 11. At the same time, the moving end cover 12 is provided with a guide hole 121, the moving end conductive rod 11 passes through the guide hole 121 of the moving end cover 12 to realize guiding, the moving end conductive rod 11 is prevented from deviating when moving, and the concentricity of the conductive sleeve 22 and the moving end conductive rod 11 is further ensured. The setting of the moving end cover 12 and the positioning cooperation with the fixed conductive seat 21 and the moving end conductive rod 11 further ensure the concentricity of the conductive sleeve 22 and the moving end conductive rod 11, and better guarantee the service life and stable operation of the fixed sealing pole. Of course, in other embodiments, the assembly of the vacuum interrupter 10 and the fixed conductive seat 21 is not limited to this, for example, the structure of the moving end cover 12 can not be used, for example, the fixed conductive seat 21 is directly assembled on the porcelain shell of the vacuum interrupter 10.
[0032] The fixed sealing pole further includes an insulating shell 40, the insulating shell 40 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, the outer periphery of the insulating shell 40 is provided with an umbrella skirt structure 41 to increase the creepage distance and ensure the safety of electricity use.
[0033] Although the utility model is specifically shown and introduced in combination with the preferred embodiments, it should be understood by those skilled in the art that various changes can be made to the utility model in form and details without departing from the spirit and scope of the utility model defined in the appended claims, and all of them are within the protection scope of the utility model.
Claims
1. A long-life sealed electrode post comprising a vacuum interrupter, a static lead-out seat and a dynamic lead-out seat, the static lead-out seat connecting a static conductive rod of the vacuum interrupter, the dynamic lead-out seat connecting a dynamic conductive rod of the vacuum interrupter; defining the moving direction of the dynamic conductive rod as the axial direction, the direction perpendicular to the axial direction as the radial direction, characterized in that: The movable end lead-out seat comprises a fixed conductive seat, a conductive sleeve, spring contact fingers and watchband contact fingers, the fixed conductive seat is fixedly arranged and has a mounting hole, the mounting hole has a larger diameter than the outer diameter of the conductive sleeve, the conductive sleeve is assembled in the mounting hole of the fixed conductive seat and is limited in the axial direction, the outer periphery of the conductive sleeve is connected with the fixed conductive seat through the spring contact fingers, and the movable end conductive rod penetrates into the center hole of the conductive sleeve and is connected with the conductive sleeve through the watchband contact fingers. 2. The long life seal pole as claimed in claim 1, wherein: The number of the spring contact fingers is at least two, and the spring contact fingers are distributed in the axial direction of the conductive sleeve.
3. The long-life solid-sealed pole as claimed in 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 fingers are assembled in the annular mounting groove.
4. The long life seal pole as recited in claim 1, wherein: The fixed conductive seat extends radially inward at the end of the mounting hole away from the vacuum arc-extinguishing chamber to form an abutting portion, and the conductive sleeve is limited between the abutting portion and the vacuum arc-extinguishing chamber to be limited in the axial direction.
5. The long life seal pole according to claim 4, wherein: The vacuum arc-extinguishing chamber has a movable end cover, the fixed conductive seat is assembled on the movable end cover, and the conductive sleeve is limited between the abutting portion and the movable end cover.
6. The long life seal pole according to claim 5, wherein: The movable end cover is provided with a guide hole, and the movable end conductive rod is arranged in the guide hole of the movable end cover to realize guidance.
7. The long life solid sealed pole as claimed in claim 5 or 6, wherein: The movable end cover is provided with an annular positioning groove, the fixed conductive seat is provided with a positioning convex ring, and the positioning convex ring of the fixed conductive seat is matched in the annular positioning groove of the movable end cover to realize positioning assembly.
8. The long life seal pole according to claim 1, wherein: Further comprising an insulating shell, the insulating shell integrally covers and fixes the vacuum arc-extinguishing chamber, the static end lead-out seat and the fixed conductive seat.
9. The long life seal pole according to claim 8, wherein: The outer periphery of the insulating shell is provided with an umbrella skirt structure.
10. The long life solid sealed pole as claimed in claim 1, wherein: The number of the watchband contact fingers is at least two, and the watchband contact fingers are distributed in the axial direction of the movable end conductive rod.