Conductive contact arm, solid-sealed polar pole and vacuum circuit breaker

Abstract

The utility model discloses a conductive contact arm, a solid-sealed polar pole and a vacuum circuit breaker, which comprise a first connecting part, a second connecting part and a square hollow heat dissipation structure connected between the first connecting part and the second connecting part, and the square hollow heat dissipation structure comprises a plurality of heat dissipation fins which are arranged in parallel at intervals. Ventilation grooves are formed in interval spaces between the adjacent heat dissipation fins. According to the utility model, the plurality of heat radiation fins are arranged in parallel and at intervals, and the interval space between the adjacent heat radiation fins forms the ventilation slot, so that the conductive contact arm has a large heat radiation slot and a large heat radiation area, and the air circulation is increased, so that the heat on the conductive contact arm can be timely radiated, and the service life of the conductive contact arm is prolonged. Therefore, the technical problems that heat on the conductive contact arm cannot be dissipated in time due to the fact that heat dissipation holes in an existing conductive contact arm are small and the heat dissipation area is limited, the temperature of the conductive contact arm is too high, and equipment is damaged when the temperature is serious are solved.

Description

Technical Field

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

[0002] The maximum rated current of existing 12kV vacuum circuit breakers on the market is only 4400A (requiring forced air cooling with a fan), and there are no vacuum circuit breakers with a high current of 5000A. When the current in a vacuum circuit breaker reaches 5000A, technical personnel, combined with internal engineering department testing, ultimately discovered that the high-current temperature rise point will appear on the conductive contact arm. Therefore, the structure and performance of the conductive contact arm will directly affect the safety and reliability of the vacuum circuit breaker. However, the heat dissipation holes on the existing conductive contact arm are small and the heat dissipation area is limited. As a result, the heat on the conductive contact arm cannot be dissipated in time, resulting in excessive temperature of the conductive contact arm, and in severe cases, damage to the equipment. Utility Model Content

[0003] In response to the shortcomings of the existing technology, the utility model provides a conductive contact arm, which arranges a number of heat dissipation fins in parallel and at intervals, and forms ventilation grooves in the spaces between adjacent heat dissipation fins. In this way, not only the conductive contact arm has a larger heat dissipation groove and heat dissipation area, but also the air circulation is increased, so that the heat on the conductive contact arm can be dissipated in time.

[0004] To achieve the above-mentioned purpose, the present invention is realized through the following technical solutions:

[0005] A conductive contact arm includes a first connecting portion, a second connecting portion, and a square hollow heat dissipation structure connected between the first connecting portion and the second connecting portion. The square hollow heat dissipation structure includes a plurality of heat dissipation fins that are parallel to each other and arranged at intervals, and the intervals between adjacent heat dissipation fins form ventilation slots.

[0006] Furthermore, the heat dissipating fins include a front section, a middle section and a rear section in sequence. The front section of the heat dissipating fins is used to connect to the first connecting part, and the rear section of the heat dissipating fins is used to connect to the second connecting part, and the cross-sectional thickness dimensions of the front section, middle section and rear section of the heat dissipating fins are the same.

[0007] Furthermore, the rear section of the heat dissipation fin extends to the end portion of the second connecting portion.

[0008] Furthermore, an epoxy resin layer is provided on the surface of the square hollow heat dissipation structure.

[0009] Furthermore, the first connecting portion is a contact slot structure for adapting and connecting to the contact, and the second connecting portion is a joint structure for adapting and connecting to the sealed pole.

[0010] Furthermore, two connecting holes are formed on the second connecting portion.

[0011] Based on the same inventive concept, the present invention also provides a sealed pole, comprising a column having a connection port and the above-mentioned conductive contact arm, wherein the second connection portion of the conductive contact arm is adaptively connected to the connection port of the column.

[0012] Based on the same inventive concept, the present invention also provides a vacuum circuit breaker, comprising the above-mentioned conductive contact arm or the above-mentioned sealed pole.

[0013] Furthermore, the vacuum circuit breaker is applied to 5000A high current working conditions.

[0014] The above technical solution has the following advantages or beneficial effects:

[0015] The conductive contact arm, sealed pole, and vacuum circuit breaker described in the present invention utilize a plurality of heat dissipation fins arranged in parallel and spaced relation, with the spaces between adjacent heat dissipation fins forming ventilation slots. This not only provides the conductive contact arm with a larger heat dissipation slot and heat dissipation area, but also increases air flow, thereby allowing heat from the conductive contact arm to be dissipated promptly. This improves the technical problem of existing conductive contact arms having small heat dissipation holes and limited heat dissipation area, which prevents heat from the conductive contact arm from being dissipated promptly, resulting in excessively high temperatures in the conductive contact arm and, in severe cases, damage to the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the conductive contact arm of an embodiment of the utility model at a first viewing angle.

[0017] Figure 2 3 is a schematic structural diagram of the conductive contact arm of an embodiment of the present utility model at a second viewing angle.

[0018] Figure 3 It is a schematic structural diagram of the conductive contact arm of an embodiment of the utility model from a third viewing angle.

[0019] Figure 4 It is a cross-sectional view of the conductive contact arm of an embodiment of the present utility model at one viewing angle.

[0020] Figure 5 It is a cross-sectional view of the conductive contact arm of an embodiment of the present utility model from another perspective.

[0021] Figure 6 yes Figure 5 Schematic diagram of the three-dimensional structure.

[0022] Figure 7 It is a structural schematic diagram of the solid-sealed pole in an embodiment of the utility model.

[0023] Description of labels:

[0024] 1. First connection part, 2. Heat dissipation fins, 3. Ventilation slots, 4. Second connection part, 5. Column, 21. Front section, 22. Middle section, 23. Rear section, 41. Connection hole. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0027] Please refer to the attached Figure 1 To the attached Figure 6 One embodiment of the present invention provides a conductive contact arm, comprising a first connecting portion 1, a second connecting portion 4, and a square hollow heat dissipation structure connected between the first connecting portion 1 and the second connecting portion 4. The square hollow heat dissipation structure includes a plurality of heat dissipation fins 2 arranged in parallel and spaced apart from each other, with the spaces between adjacent heat dissipation fins 2 forming ventilation slots 3 to dissipate heat from the conductive contact arm. It will be appreciated that in this embodiment, by arranging the plurality of heat dissipation fins 2 in parallel and spaced apart, and forming ventilation slots 3 in the spaces between adjacent heat dissipation fins 2, not only does the conductive contact arm have a larger heat dissipation slot and heat dissipation area, but it also increases air circulation, thereby dissipating heat from the conductive contact arm in a timely manner. Furthermore, the conductive contact arm of the present invention also has the advantage of a simple structure, further saving production costs.

[0028] Please refer to the attached Figure 1 To the attached Figure 6 In one preferred embodiment, the heat dissipation fin 2 includes a front section 21, a middle section 22 and a rear section 23 in sequence. The front section 21 of the heat dissipation fin 2 is used to connect with the first connection part 1, and the rear section 23 of the heat dissipation fin 2 is used to connect with the second connection part 4. The cross-sectional thickness of the front section 21, the middle section 22 and the rear section 23 of the heat dissipation fin 2 are the same, so that the square hollow heat dissipation structure is neat and beautiful as a whole.

[0029] Please refer to the attached Figure 1 To the attached Figure 3 In one preferred embodiment, the rear section 23 of the heat dissipating fin 2 extends to the end position of the second connecting portion 4, so that the heat dissipation area of the conductive contact arm can be further increased under a certain size control.

[0030] Please refer to the attached Figure 1 To the attached Figure 6 In one preferred embodiment, a layer of epoxy resin is provided on the surface of the square hollow heat dissipation structure. The epoxy resin layer enables the square hollow heat dissipation structure to withstand high temperatures and plays a role in protecting the square hollow heat dissipation structure.

[0031] Please refer to the attached Figure 1 To the attached Figure 6 In one preferred embodiment, the first connecting portion 1 is a contact slot structure for adapting to the contact, and the second connecting portion 4 is a connector structure for adapting to the sealed pole. It will be understood that in this embodiment, the first connecting portion 1 and the second connecting portion 4 can achieve a fixed connection between the conductive contact arm, the contact, and the sealed pole.

[0032] Please refer to the attached Figure 3 To the attached Figure 5 In one preferred embodiment, two connection holes 41 are formed in the second connection portion 4. It will be appreciated that, in this embodiment, bolts are installed in the two connection holes 41, enabling the conductive contact arm to be mounted on the sealed pole. However, those skilled in the art will appreciate that, in other embodiments, the number of connection holes 41 is not limited to the specific embodiment disclosed in this embodiment.

[0033] Please refer to the attached Figure 1 To the attached Figure 7 One embodiment of the present invention further provides a sealed pole, comprising a column 5 having a connection port and the aforementioned conductive contact arm, wherein the second connection portion 4 of the conductive contact arm is adapted to connect with the connection port of the column 5. It will be appreciated that in this embodiment, the conductive contact arm is fixedly connected to the column 5 of the sealed pole by bolts in the connection hole 41 of the second connection portion 4, thereby achieving a fixed connection between the conductive contact arm and the sealed pole.

[0034] Please refer to the attached Figure 1 To the attached Figure 7 One embodiment of the present invention further provides a vacuum circuit breaker, comprising the above-mentioned conductive contact arm or the above-mentioned sealed pole. Preferably, the vacuum circuit breaker is used in a high current operating condition of 5000A. The original intention of the design of the present invention is to solve the problem of temperature rise of the conductive contact arm under the high current operating condition of 5000A. By increasing the heat dissipation slot and heat dissipation area of the conductive contact arm, the heat on the conductive contact arm is dissipated in a timely manner, thereby solving the temperature rise problem of the conductive contact arm under the high current operating condition of 5000A. Therefore, the vacuum circuit breaker of this embodiment should be used in the high current operating condition of 5000A.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present invention.

Claims

1. A conductive contact arm, characterized in that: The invention comprises a first connecting portion (1), a second connecting portion (4), and a square hollow heat dissipation structure connected between the first connecting portion (1) and the second connecting portion (4); the square hollow heat dissipation structure comprises a plurality of heat dissipation fins (2) arranged parallel to each other and spaced apart; the spaces between adjacent heat dissipation fins (2) form ventilation slots (3).

2. The conductive contact arm according to claim 1, wherein: The heat dissipation fin (2) comprises a front section (21), a middle section (22) and a rear section (23) in sequence; the front section (21) of the heat dissipation fin (2) is used to connect with the first connection portion (1), and the rear section (23) of the heat dissipation fin (2) is used to connect with the second connection portion (4).

3. The conductive contact arm according to claim 2, wherein: The front section (21), the middle section (22) and the rear section (23) of the heat dissipation fin (2) have the same cross-sectional thickness.

4. The conductive contact arm according to claim 2, wherein: The rear section (23) of the heat dissipation fin (2) extends to the end position of the second connecting portion (4).

5. The conductive contact arm according to claim 1, wherein: An epoxy resin layer is provided on the surface of the square hollow heat dissipation structure.

6. The conductive contact arm according to any one of claims 1 to 5, characterized in that: The first connecting portion (1) is a contact slot structure for adaptively connecting to a contact, and the second connecting portion (4) is a joint structure for adaptively connecting to a sealed pole.

7. The conductive contact arm according to claim 6, wherein: Two connecting holes (41) are provided on the second connecting portion (4).

8. A sealed pole, characterized in that: The invention comprises a column (5) having a connection port and a conductive contact arm according to any one of claims 1 to 7, wherein the second connection portion (4) of the conductive contact arm is adaptively connected to the connection port of the column (5).

9. A vacuum circuit breaker, characterized in that: It comprises the conductive contact arm according to any one of claims 1 to 7 or the sealed pole according to claim 8.

10. The vacuum circuit breaker according to claim 9, characterized in that: The vacuum circuit breaker is applied to a high current working condition of 5000A.

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