Solid-sealed polar pole and vacuum circuit breaker

Abstract

The utility model provides a solid-sealed polar pole and a vacuum circuit breaker, the solid-sealed polar pole comprises a vacuum arc-extinguishing chamber, the vacuum arc-extinguishing chamber is provided with an upper outgoing line and a lower outgoing line, the lower outgoing line comprises a conductive column and a static contact plate which are integrally connected, one end of the conductive column is connected with a first outgoing line end of the vacuum arc-extinguishing chamber, and the other end of the conductive column is provided with the static contact plate; and the insulating seat is cast on the vacuum arc-extinguishing chamber and the conductive column. Compared with the mode of large contact resistance caused by many bolt connection points in the prior art, the contact resistance is small, the temperature rise is reduced, the copper material consumption is low, and the production cost is reduced; besides, after the vacuum arc-extinguishing chamber and the conductive column are assembled, the insulating seat is formed through casting, so that compared with the mode of casting twice in the prior art, the production process is simpler, and the production cost is further reduced.

Description

Technical Field

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

[0002] Outdoor high voltage vacuum circuit breaker is a high voltage circuit breaker used in power system, which uses vacuum as the circuit breaking medium and is installed and operated in outdoor environment. This kind of circuit breaker is mainly used in medium voltage and high voltage power system to protect power equipment from overcurrent, short circuit and other faults.

[0003] The structure of the sealed pole of the existing vacuum circuit breaker and the static contact assembly of the isolating switch is as follows: Figure 6 As shown, the sealed pole includes a vacuum arc chamber seat 01, and a vacuum arc chamber 02 arranged in the vacuum arc chamber seat 01. One end of the vacuum arc chamber 02 is provided with an upper outlet 03, and the other end is connected to the static contact 07 of the disconnector through a flexible connection 04, a lower outlet 05 and a lap copper busbar 06. Since the flexible connection 04 and the lower outlet 05, the lower outlet 05 and the lap copper busbar 06, and the lap copper busbar 06 and the static contact 07 are all fixed by bolts, there are many bolt connection points between the static contact 07 and the outlet end of the vacuum arc chamber 02, which not only increases the contact resistance and increases the temperature rise, but also consumes copper materials and increases the production cost. In addition, the vacuum arc chamber 02 is formed into the vacuum arc chamber seat 01 by casting, and the static contact 07 is formed into the static contact seat 08 by casting, that is, two castings are required to form the vacuum arc chamber seat and the static contact seat, and the production process is relatively complicated, which further increases the production cost. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defects of the prior art that the contact resistance between the static contact and the outlet end of the vacuum arc chamber is not only large but also the production cost is high, thereby providing a sealed pole and vacuum circuit breaker with small contact resistance and low production cost.

[0005] To this end, the utility model provides a sealed pole, including a vacuum arc chamber and an insulating seat, the vacuum arc chamber having an upper outlet and a lower outlet, the lower outlet comprising an integrally connected conductive column and a static contact plate, one end of the conductive column is connected to the first outlet end of the vacuum arc chamber, and the other end is provided with the static contact plate; the insulating seat is cast on the vacuum arc chamber and the conductive column.

[0006] The conductive column has a connecting plate and an annular flange respectively arranged at two ends thereof, the connecting plate is fixed to the vacuum arc extinguishing chamber by screws, and the static contact plate is vertically arranged in the middle of a side of the annular flange away from the conductive column.

[0007] The insulating seat includes a vacuum interrupter seat and a static contact seat respectively arranged corresponding to the vacuum interrupter and the lower outlet, the vacuum interrupter seat is integrally connected with the static contact seat, the static contact seat has a first section suitable for covering the conductive column, and a second section in the shape of a hollow column, the second section has a notch for inserting a moving contact.

[0008] A first reinforcement portion is provided on the inner wall of the second section corresponding to the notch.

[0009] A triangular second reinforcement portion is provided at the connection between the vacuum interrupter seat and the first section.

[0010] The upper outlet is connected to the second outlet terminal of the vacuum interrupter through a flexible connection.

[0011] The utility model also provides a vacuum circuit breaker, comprising the sealed pole as described above.

[0012] The technical solution of the utility model has the following advantages:

[0013] 1. The sealed pole provided by the utility model comprises a vacuum arc chamber and an insulating seat, and the lower outlet comprises an integrally connected conductive column and a static contact plate, one end of the conductive column is connected to the first outlet end of the vacuum arc chamber, and the other end is provided with a static contact plate. Compared with the prior art method with many bolt connection points resulting in large contact resistance, not only is the contact resistance small and the temperature rise reduced, but also the copper consumption is small and the production cost is reduced; in addition, the insulating seat is cast on the vacuum arc chamber and the conductive column, and compared with the prior art method which requires two casting steps, this production process is simpler and the production cost is further reduced.

[0014] 2. The sealed pole provided by the utility model has a static contact seat with a first section suitable for covering the conductive pole and a second section in the shape of a hollow column, so that the conductive pole will not be exposed to the outside, thereby improving the insulation performance.

[0015] 3. The sealed pole provided by the utility model has a first reinforcement portion on the inner wall of the second section corresponding to the notch, thereby improving the structural strength and avoiding the situation where the second section is broken due to excessive rotation of the moving contact and contact with the inner wall of the second section, thereby ensuring the insulation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1It is a three-dimensional diagram of the solid-sealed pole of the utility model;

[0018] Figure 2 for Figure 1 sectional view of

[0019] Figure 3 The figure is a schematic diagram of the disassembly of the sealed pole;

[0020] Figure 4 It is a three-dimensional diagram of the lower outlet;

[0021] Figure 5 is a three-dimensional diagram of an insulating seat;

[0022] Figure 6 It is a schematic diagram of the structure of the sealed pole and the static contact in the prior art.

[0023] Description of reference numerals: 01, vacuum interrupter seat; 02, vacuum interrupter; 03, upper outlet; 04, flexible connection; 05, lower outlet; 06, overlapping copper bar; 07, static contact; 08, static contact seat;

[0024] 1. Vacuum interrupter; 2. Upper outlet; 3. Lower outlet; 4. Conductive column; 5. Static contact plate; 6. Insulation seat; 7. Connecting plate; 8. Annular flange; 9. Vacuum interrupter seat; 10. Static contact seat; 11. First section; 12. Second section; 13. Notch; 14. First reinforcement part; 15. Second reinforcement part; 16. Soft connection. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] Example 1

[0030] This embodiment provides a sealed pole, such as Figure 2 As shown, it includes a vacuum interrupter 1 and an insulating seat 6.

[0031] Vacuum interrupter 1, such as Figure 2 and Figure 3 As shown, there are an upper outlet 2 and a lower outlet 3, the upper outlet 2 is connected to the second outlet terminal of the vacuum interrupter 1 through a flexible connection 16, and the lower outlet 3 includes a conductive column 4 and a static contact plate 5 connected in one piece, one end of the conductive column 4 is connected to the first outlet terminal of the vacuum interrupter 1, and the other end is provided with the static contact plate 5. In this embodiment, as Figure 4 As shown, the conductive column 4 has a connecting plate 7 and an annular flange 8 respectively arranged at both ends thereof, the connecting plate 7 is fixed to the vacuum interrupter 1 by screws, and the static contact plate 5 is vertically arranged in the middle of a side of the annular flange 8 away from the conductive column 4

[0032] The insulating seat 6 is cast on the vacuum interrupter 1 and the conductive column 4 .

[0033] Insulation seat 6, such as Figure 1 and Figure 5 As shown, it includes a vacuum interrupter seat 9 and a static contact seat 10 respectively arranged corresponding to the vacuum interrupter 1 and the lower outlet 3, the vacuum interrupter seat 9 is integrally connected with the static contact seat 10, the static contact seat 10 has a first section 11 suitable for covering the conductive column 4, and a second section 12 in the shape of a hollow column, the second section 12 has a notch 13 for inserting the moving contact, the second section 12 is provided with a first reinforcement portion 14 on the inner wall corresponding to the notch 13, and a triangular second reinforcement portion 15 is provided at the connection between the vacuum interrupter seat 9 and the first section 11.

[0034] The utility model provides a sealed pole, including a vacuum arc chamber 1 and an insulating seat 6, and a lower outlet 3 includes a conductive column 4 and a static contact plate 5 which are connected in one piece, one end of the conductive column 4 is connected to the first outlet end of the vacuum arc chamber 1, and the other end is provided with a static contact plate 5. Compared with the prior art method with many bolt connection points and large contact resistance, not only the contact resistance is small and the temperature rise is reduced, but also the copper consumption is small and the production cost is reduced; in addition, after the vacuum arc chamber 1 and the conductive column 4 are assembled, an insulating seat 6 is formed by casting. Compared with the prior art method which requires two castings, the production process is simpler and the production cost is further reduced.

[0035] Example 2

[0036] This embodiment provides a vacuum circuit breaker, including the sealed pole as described in Embodiment 1.

[0037] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A sealed pole, characterized in that: include: A vacuum interrupter (1) having an upper outlet (2) and a lower outlet (3), wherein the lower outlet (3) comprises a conductive column (4) and a static contact plate (5) connected in one piece, wherein one end of the conductive column (4) is connected to a first outlet end of the vacuum interrupter (1), and the other end is provided with the static contact plate (5); An insulating seat (6) is cast on the vacuum arc extinguishing chamber (1) and the conductive column (4).

2. The sealed pole according to claim 1, characterized in that: The conductive column (4) has a connecting plate (7) and an annular flange (8) respectively arranged at two ends thereof, the connecting plate (7) is fixed to the vacuum arc extinguishing chamber (1) by means of screws, and the static contact plate (5) is vertically arranged at the middle of a surface of the annular flange (8) away from the conductive column (4).

3. The sealed pole according to claim 1 or 2, characterized in that: The insulating seat (6) comprises a vacuum interrupter seat (9) and a stationary contact seat (10) respectively arranged corresponding to the vacuum interrupter (1) and the lower outlet (3); the vacuum interrupter seat (9) and the stationary contact seat (10) are integrally connected; the stationary contact seat (10) comprises a first section (11) suitable for covering the conductive column (4) and a second section (12) in the shape of a hollow column; the second section (12) comprises a notch (13) for inserting a moving contact.

4. The sealed pole according to claim 3, characterized in that: A first reinforcement portion (14) is provided on the inner wall of the second section (12) corresponding to the notch (13).

5. The sealed pole according to claim 3, characterized in that: A triangular second reinforcement portion (15) is provided at the connection between the vacuum interrupter seat (9) and the first section (11).

6. The sealed pole according to claim 1, characterized in that: The upper outlet (2) is connected to the second outlet end of the vacuum interrupter (1) via a flexible connection (16).

7. A vacuum circuit breaker, characterized in that: It comprises the sealed pole as claimed in any one of claims 1 to 6.

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