Insulation solid-sealed polar pole

Abstract

The utility model discloses an insulation solid-sealed polar pole which comprises a polar pole body, a shielding piece and a circuit breaker assembly. A mounting surface for mounting and positioning is arranged on the outer side wall of the pole body, a mounting cavity penetrating in the axial direction is formed in the pole body, and a circuit breaker assembly is arranged in the mounting cavity; the shielding piece is arranged in the pole body, at least part of the shielding piece is arranged between the mounting surface and the circuit breaker assembly, and the shielding piece is used for isolating the mounting surface from the circuit breaker assembly. The insulation problem of the solid-sealed polar pole is solved.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment, and in particular to an insulating and solidified pole post. Background Technology

[0002] As a crucial component of circuit breakers, the solid-sealed pole, after its vacuum interrupter chamber completes the tripping operation, typically performs an isolation operation to isolate faults. Existing circuit breakers combine the circuit breaker and isolation functions. Their structure primarily involves mounting the solid-sealed pole on a rotatable metal longitudinal beam. After the circuit breaker trips, the rotation of the metal longitudinal beam repositions the solid-sealed pole to achieve isolation.

[0003] Therefore, when the solid-sealed terminal is installed on the metal longitudinal beam, the electric field generated by the solid-sealed terminal in the closed state is easily interfered with by the metal longitudinal beam, causing electric field concentration. As a result, discharge problems are likely to occur at the connection between the solid-sealed terminal and the metal longitudinal beam. Utility Model Content

[0004] In order to overcome at least one of the defects described in the prior art, the present invention provides an insulated and sealed pole to solve the insulation problem of the sealed pole.

[0005] The technical solution adopted by this utility model to solve its problem is:

[0006] An insulated and sealed pole includes a pole body, a shielding component, and a circuit breaker assembly;

[0007] The outer wall of the pole body is provided with a mounting surface for installation and positioning, and the pole body is provided with an axially penetrating mounting cavity, in which a circuit breaker assembly is installed.

[0008] The shielding element is disposed in the pole body, and at least a portion of the shielding element is disposed between the mounting surface and the circuit breaker assembly, the shielding element being used to isolate the mounting surface and the circuit breaker assembly.

[0009] Furthermore, the shielding component includes a metal cylindrical body that surrounds the outer periphery of the circuit breaker assembly.

[0010] Furthermore, the end edge of the metal cylindrical body is provided with a rolled edge, and the rolled edge includes at least one complete closed loop.

[0011] Furthermore, the metal cylindrical body is a metal braided tube.

[0012] Furthermore, along the axial direction of the pole body, the length of the shield is greater than or equal to the length of the mounting surface.

[0013] Furthermore, perpendicular to the axial direction of the pole body, the width of the shield is greater than or equal to the width of the mounting surface.

[0014] Furthermore, the mounting surface is provided with multiple mounting holes.

[0015] Furthermore, the outer wall of the pole body is provided with a plurality of annular protrusions, which are distributed at intervals along the axial direction of the pole body and form an umbrella skirt.

[0016] Furthermore, the annular protrusion includes a plurality of first protruding rings and a plurality of second protruding rings, the first protruding rings and the second protruding rings being alternately arranged, and the outer ring diameter of the first protruding ring is larger than the outer ring diameter of the second protruding ring.

[0017] Furthermore, the pole body is formed by casting, and the shielding component is cast and fixed in the pole body.

[0018] In summary, the insulating and solidified pole provided by this utility model has the following technical effects:

[0019] The shielding component isolates the mounting surface from the circuit breaker assembly. When external components are installed on the mounting surface, the shielding component can shield the electric field of the circuit breaker assembly, preventing the electric field from concentrating at the location of the external component and ensuring electrical safety. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0021] Figure 2 for Figure 1 A sectional view;

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0023] The meanings of the reference numerals in the attached figures are as follows:

[0024] 10. Pole post body; 101. Mounting surface; 111. Mounting hole; 20. Shielding component; 21. Metal cylindrical body; 211. Crimped edge; 30. Circuit breaker assembly; 31. Moving contact; 32. Vacuum interrupter; 33. External assembly; 331. Moving terminal; 332. Disc spring drive rod; 333. Lower contact seat; 40. Umbrella skirt; 41. First convex ring; 42. Second convex ring. Detailed Implementation

[0025] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0026] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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 utility model.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0028] See Figure 1 and Figure 2 This utility model discloses an insulated and sealed pole, including a pole body 10, a shield 20, and a circuit breaker assembly 30. The outer wall of the pole body 10 has a mounting surface 101 for installation and positioning. An axially penetrating mounting cavity is provided in the pole body 10, and the circuit breaker assembly 30 is disposed in the mounting cavity. The shield 20 is disposed in the pole body 10, and at least a portion of the shield 20 is disposed between the mounting surface 101 and the circuit breaker assembly 30, thereby isolating the mounting surface 101 and the circuit breaker assembly 30.

[0029] The pole body 10 is usually manufactured by epoxy casting and is usually cylindrical. The pole body 10 has a mounting cavity that runs through both ends along its axial direction in the middle. The circuit breaker assembly 30 is installed in the mounting cavity. It is known that the circuit breaker assembly 30 usually includes: moving contact 31, vacuum interrupter 32 and external component 33.

[0030] Specifically, the moving contact 31 is disposed at one end of the mounting cavity. The vacuum interrupter 32 is disposed in the mounting cavity, and one end is connected to the moving contact 31.

[0031] The external assembly 33 typically consists of a moving terminal 331, a disc spring drive rod 332, and a lower contact seat 333. The moving terminal 331 is movably disposed at the end of the vacuum interrupter 32 away from the moving contact 31. The disc spring drive rod 332 is disposed in the mounting cavity, with one end extending into the mounting cavity away from the moving contact 31. The lower contact seat 333 is disposed at the end of the mounting cavity away from the moving contact 31 to fix the disc spring drive rod 332. Importantly, the moving terminal 331 reciprocates axially along the mounting cavity, allowing it to contact and close or disconnect with the end of the disc spring drive rod 332 located within the mounting cavity, thereby achieving connection or disconnection of the sealed electrode. Furthermore, the actuation mechanism of the moving terminal 331 is prior art and will not be elaborated upon here.

[0032] Importantly, the mounting surface 101 is preferably located in the middle of the pole body 10, thereby achieving the effect of balancing the installation center of gravity. In this embodiment, the mounting surface is, for example, a rectangular plane; the shield 20 is isolated between the mounting surface 101 and the circuit breaker assembly 30. Preferably, in order to better isolate the mounting surface 101 from the circuit breaker assembly 30 while reducing the material area of ​​the shield 20, in this embodiment, it is assumed that the projection of the mounting surface 101 perpendicular to the axis of the pole body 10 is S1, and the projection of the shield 20 perpendicular to the axis of the pole body 10 is S2. S2 only needs to cover S1, so that the shield 20 can completely isolate the mounting surface 101. In other aspects, in this embodiment, the shield 20 is placed in the mold of the pole body 10 before the pole body 10 is cast. After the pole body 10 is cast, the shield 20 is cast into the pole body 10, thus ensuring convenient and reliable fixation of the shield 20 without the need for separate installation of the shield 20.

[0033] In practical applications, the mounting surface 101 of the pole body 10 is used for connection with external components, typically beams. It should be noted that the cylindricity of the pole body 10 corresponding to the mounting surface 101 is weakened. This makes the mounting surface 101 prone to electric field concentration when the sealed pole is energized, leading to discharge problems and compromising insulation. In this solution, a shielding element 20 is installed between the mounting surface 101 and the circuit breaker assembly 30. This effectively shields the electric field emitted from the circuit breaker assembly 30 to the mounting surface 101 at this location when energized, preventing electric field concentration at the mounting surface 101.

[0034] Optionally, the shield 20 includes a metal cylindrical body 21 that surrounds the outer periphery of the circuit breaker assembly 30.

[0035] The shielding component 20 is made of metal, preferably copper. The shielding component 20 is cylindrical, which allows it to completely enclose the area corresponding to the circuit breaker assembly 30 and the mounting surface 101. The cylindrical structure of the shielding component 20 also ensures a more uniform distribution of the electric field, preventing electric field concentration.

[0036] Optionally, the end edge of the metal cylindrical body 21 is provided with a rolled edge 211, which includes at least one complete closed loop.

[0037] In this embodiment, both ends of the aforementioned metal cylindrical body 21 are rounded. Rounded edges, being narrow edges, are also prone to causing electric field concentration. For a preferred embodiment, see [reference needed]. Figure 3 In this embodiment, rolled edges 211 are provided at both ends of the metal cylindrical body 21. Preferably, the rolled edges 211 include at least one complete closed loop. For example, the rolled edges 211 are rolled on the outer wall of the metal cylindrical body 21 and curled toward the middle of the metal cylindrical body 21. The rolled edges 211 are rolled into at least one complete closed loop. The structure of the complete closed loop forms a ring. The electric field distribution of the ring-shaped rolled edges 211 is more uniform, further avoiding the problem of concentrated discharge caused by uneven electric field.

[0038] Optionally, the metal cylindrical body 21 is a metal braided tube.

[0039] The braided tube has a porous sidewall structure, allowing the casting material to be better embedded in the holes during the casting of the pole body 10. This enables the metal cylindrical body 21 and the pole body 10 to form a more integrated structure. Furthermore, the braided metal tube reduces the overall weight of the shielding component 20 while ensuring shielding. Alternatively, the metal cylindrical body 21 can be made from a lighter metal sheet to create a non-porous metal cylindrical body 21.

[0040] Optionally, along the axial direction of the pole body 10, the length dimension of the shield 20 is A, and the length dimension of the mounting surface 101 is a, where A is greater than or equal to a.

[0041] Combination Figure 2 Where A = a, in the axial direction of the pole body 10 (taking this as the vertical direction), the top end of the shield 20 is aligned with the top end of the mounting surface 101, and the bottom end of the shield 20 is aligned with the bottom end of the mounting surface 101. Where A > a, in the axial direction of the pole body 10, the mounting surface 101 is located between the top and bottom ends of the shield 20. Thus, in the axial direction of the pole body 10, the shield 20 completely shields and blocks the mounting surface 101.

[0042] Optionally, perpendicular to the axial direction of the pole body 10, the width dimension of the shield 20 is B, and the width dimension of the mounting surface 101 is b, where B is greater than or equal to b.

[0043] Combination Figure 2 Where B = b, perpendicular to the axial direction of the pole body 10 (taking this as the horizontal direction), the perpendicular point intersects the axis of the pole body 10, the left end of the shield 20 is aligned with the left end of the mounting surface 101, and the right end of the shield 20 is aligned with the right end of the mounting surface 101. Where B > b, perpendicular to the axial direction of the pole body 10 (taking this as the horizontal direction), the perpendicular point intersects the axis of the pole body 10, and the mounting surface 101 is located between the left and right ends of the shield 20. Thus, in the direction perpendicular to the axial direction of the pole body 10, the shield 20 completely shields and blocks the mounting surface 101.

[0044] Based on the above, A*B = S2, a*b = S1, so in the direction perpendicular to the axis of the pole body 10, S1 should be entirely projected into S2.

[0045] Optionally, the mounting surface 101 is provided with a plurality of mounting holes 111.

[0046] Combination Figure 2 Taking the rectangular mounting surface 101 as an example, each of the four corners of the mounting surface 101 is provided with a mounting hole 111. Preferably, the mounting hole 111 is a threaded hole. Taking the above example of the crossbeam being installed on the mounting surface 101, the bolt passes through the crossbeam and is screwed into the mounting hole 111.

[0047] Optionally, the outer wall of the pole body 10 is provided with a plurality of annular protrusions, which are distributed at intervals along the axial direction of the pole body 10 and form a skirt 40.

[0048] Among them, the annular protrusion can increase the surface area of ​​the electrode body 10 and enhance the heat dissipation capacity; in addition, the annular protrusion increases the creepage path on the surface of the electrode body 10, thereby increasing the creepage distance at both ends of the electrode body 10 and enhancing electrical safety.

[0049] Optional, see below Figure 1 or Figure 2 The annular protrusion includes multiple first protruding rings 41 and multiple second protruding rings 42, which are alternately arranged, and the outer diameter of the first protruding ring 41 is larger than the outer diameter of the second protruding ring 42. The tops of adjacent first protruding rings 41 and second protruding rings 42 are spatially misaligned to avoid mutual inductive discharge between their tops.

[0050] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. An insulating and solidified electrode post, characterized in that, It includes the pole body (10), the shield (20), and the circuit breaker assembly (30); The outer wall of the pole body (10) is provided with a mounting surface (101) for installation and positioning. The pole body (10) is provided with an axially penetrating mounting cavity. The mounting cavity is provided with a circuit breaker assembly (30). The shield (20) is disposed in the pole body (10), and at least part of the shield (20) is disposed between the mounting surface (101) and the circuit breaker assembly (30), the shield (20) being used to isolate the mounting surface (101) and the circuit breaker assembly (30).

2. The insulating and sealed pole according to claim 1, characterized in that, The shielding element (20) includes a metal cylindrical body (21) that surrounds the outer periphery of the circuit breaker assembly (30).

3. The insulating and sealed pole according to claim 2, characterized in that, The end edge of the metal cylindrical body (21) is provided with a rolled edge (211), and the rolled edge (211) includes at least one complete closed loop.

4. The insulating and sealed pole according to claim 2 or 3, characterized in that, The metal cylindrical body (21) is a metal woven tube.

5. The insulating and sealed pole according to claim 1, characterized in that, Along the axial direction of the pole body (10), the length of the shield (20) is greater than or equal to the length of the mounting surface (101).

6. The insulating and sealed pole according to claim 1, characterized in that, Perpendicular to the axial direction of the pole body (10), the width of the shield (20) is greater than or equal to the width of the mounting surface (101).

7. The insulating and sealed pole according to claim 1, characterized in that, The mounting surface (101) is provided with a plurality of mounting holes (111).

8. The insulating and sealed pole according to claim 1, characterized in that, The outer wall of the pole body (10) is provided with a plurality of annular protrusions, which are distributed at intervals along the axial direction of the pole body (10) and form a skirt (40).

9. The insulating and sealed pole according to claim 8, characterized in that, The annular protrusion includes a plurality of first protruding rings (41) and a plurality of second protruding rings (42), the first protruding rings (41) and the second protruding rings (42) are alternately arranged, and the outer ring diameter of the first protruding ring (41) is larger than the outer ring diameter of the second protruding ring (42).

10. The insulating and sealed pole according to claim 1, characterized in that, The pole body (10) is formed by casting, and the shielding component (20) is cast and fixed in the pole body (10).

Images