A kind of wobbler contact and vacuum circuit breaker

Abstract

The utility model discloses a plum blossom contact and vacuum circuit breaker, including a plurality of installation on the support ring aluminum contact patch, each aluminum contact patch two two combinations form a pair of contact patch group, and each contact patch group presents ring shape and evenly arranged on the support ring, and there is no vacancy between the inside end of adjacent contact patch group. The plum blossom contact of the utility model can evenly and closely arrange each contact patch group, so that there is no obvious vacancy between the adjacent contact patch groups, the contact part of the plum blossom contact is formed into a whole circle type contact structure by each aluminum contact patch, thereby effectively improving the contact stability of the plum blossom contact, greatly reducing the probability of contact failure of the plum blossom contact, and the aluminum contact patch of aluminum material can effectively reduce the material cost compared with copper material, avoid material resource waste, and achieve the effect of cost reduction.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a plum blossom contact and a vacuum circuit breaker. Background Technology

[0002] As attached Figure 4 The diagram shows a conventional vacuum circuit breaker with a sprite-shaped contact. The sprite-shaped contact has a diameter of 35mm and is provided with 16 contact pieces 1'. The contact pieces 1' are made of copper substrate and have a thickness of 2.5mm. The 16 contact pieces 1' are stacked together in pairs to form 8 pairs of contact pieces. The 8 pairs of contact pieces are then installed sequentially on the support ring 2'. However, due to the number of contact pieces 1', uneven meshing force is easily caused, resulting in insufficient meshing force. This makes the sprite-shaped contact prone to poor contact defects, causing safety hazards. Utility Model Content

[0003] In view of the shortcomings of the existing technology, this utility model provides a plum blossom contact, which mainly solves the technical problem that the existing plum blossom contact is prone to poor contact defects.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0005] A plum blossom contact includes several aluminum contact pieces mounted on a support ring. Each aluminum contact piece is combined in pairs to form a contact piece group. Each contact piece group is evenly arranged in a ring on the support ring, and there are no gaps between the inner ends of adjacent contact piece groups.

[0006] Furthermore, 24 aluminum contact pieces are installed on the support ring. The 24 aluminum contact pieces are combined in pairs to form 12 contact piece groups. The 12 contact piece groups are arranged in a ring-shaped, centrally symmetrical manner on the support ring.

[0007] Furthermore, the inner ends of adjacent contact pads are configured to be closely adjacent, thereby forming a complete circular contact structure without gaps.

[0008] Furthermore, the thickness of the aluminum contact piece is 3mm.

[0009] Furthermore, the aluminum contact pads are made of 6063 aluminum alloy.

[0010] Furthermore, a first contact portion and a second contact portion are formed at the inner end of the aluminum contact piece, and the surfaces of the first contact portion and the second contact portion are provided with a silver plating layer.

[0011] Furthermore, the thickness of the silver plating layer on the surfaces of the first and second contact portions is 6–10 μm.

[0012] Furthermore, the plum blossom contact also includes a spring sleeved on the outside of each pair of contact pieces.

[0013] Furthermore, the plum blossom contact includes two support rings arranged vertically opposite each other, and a reinforcing support column is connected between the two support rings.

[0014] Based on the same inventive concept, this utility model also provides a vacuum circuit breaker, including any of the above-described plum blossom contacts.

[0015] The above technical solution has the following advantages or beneficial effects:

[0016] In the plum blossom contact and vacuum circuit breaker described in this utility model, since each contact piece group can be arranged evenly and tightly, there are no obvious gaps between adjacent contact piece groups. The contact part of the plum blossom contact is formed by the aluminum contact pieces surrounding it to form a circular contact structure, which effectively improves the contact stability of the plum blossom contact and greatly reduces the probability of poor contact. Furthermore, compared with copper, aluminum contact pieces can effectively reduce material costs, avoid waste of material resources, and achieve cost reduction. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the plum blossom contact in an embodiment of this utility model.

[0018] Figure 2 yes Figure 1 A cross-sectional view of the AA structure of the plum blossom contact in the image.

[0019] Figure 3 This is a schematic diagram of the structure of the aluminum contact sheet according to an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the structure of a conventional plum blossom contact.

[0021] Label Explanation:

[0022] 1. Aluminum contact piece; 11. First contact part; 12. Second contact part; 2. Support ring; 3. Spring; 4. Support column. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., 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.

[0025] Please refer to the appendix. Figure 1 Appendix Figure 2 One embodiment of this utility model provides a plum blossom contact, including a plurality of aluminum contact pieces 1 mounted on a support ring 2. Each aluminum contact piece 1 is combined in pairs to form a contact piece group. The contact piece groups are evenly arranged in a ring on the support ring 2, and there are no gaps between the inner ends of adjacent contact piece groups. In a preferred embodiment, the inner ends of adjacent contact piece groups are configured to be closely adjacent (closely adjacent means compared to attached). Figure 4 Regarding the empty space 3' in the prior art shown, it is not strictly limited that there cannot be an appropriate assembly gap between adjacent contact groups, thus forming a complete circular contact structure without empty spaces (the "no empty spaces" mentioned in this embodiment means that the inner ends of adjacent contact groups are arranged relatively closely, with an appropriate assembly gap, but there are no extra installation spaces for installing more contact groups). It can be understood that in this embodiment, since each contact group can be arranged evenly and closely, there are no obvious empty spaces between adjacent contact groups. The contact part of the plum blossom contact is formed by the aluminum contact pieces 1 forming a complete circular contact structure, which effectively improves the contact stability of the plum blossom contact, greatly reduces the probability of poor contact of the plum blossom contact, and the aluminum contact pieces 1, compared with copper, can effectively reduce material costs, avoid waste of material resources, and achieve the effect of cost reduction.

[0026] Please refer to the appendix. Figure 1 Appendix Figure 2 In one preferred embodiment, 24 aluminum contact pieces 1 are mounted on the support ring 2. These 24 aluminum contact pieces 1 are combined in pairs to form 12 contact groups, which are arranged symmetrically in a ring around the support ring 2. Currently, there are no dedicated molds developed for 16-contact-piece perforated contact heads on the market. Instead, 24-contact-piece molds are often used to extract 8 contact pieces. Since the perforated contact head in this embodiment has 24 contact pieces, existing 24-contact-piece perforated contact head molds can be directly used. Preferably, the thickness of the aluminum contact piece 1 is 3mm. In this embodiment, the number of contact pieces in the existing 16-piece contact structure of the plum blossom contact is increased from 16 to 24, the thickness is increased from 2.5mm to 3mm, and the material is changed from T2Y pure copper to aluminum. This increases the number of contact points and contact area of ​​the plum blossom contact, while still meeting the current-carrying capacity of aluminum. This greatly improves the probability of passing the temperature rise test and the reliability of the circuit breaker during operation. At the same time, the use of cheaper aluminum material reduces material costs and avoids waste of material resources, achieving cost reduction. Furthermore, no special mold is required; the existing 24-piece plum blossom contact mold can effectively ensure the meshing force of the moving and stationary contacts, avoid poor contact, and improve the safety and stability of the power system.

[0027] Please refer to the appendix. Figure 1 Appendix Figure 2In one preferred embodiment, the aluminum contact 1 is a contact structure made of 6063 aluminum alloy. However, those skilled in the art should understand that in other embodiments, the aluminum contact 1 may also be made of an aluminum alloy material with the same or similar properties as 6063 aluminum alloy, and is not limited to the specific implementation method disclosed in this embodiment.

[0028] Please refer to the appendix. Figure 1 Appendix Figure 2 In one preferred embodiment, a first contact portion 11 and a second contact portion 12 are formed at the inner end of the aluminum contact piece 1, and the surfaces of the first contact portion 11 and the second contact portion 12 are provided with a silver plating layer. The thickness of the silver plating layer on the surfaces of the first contact portion 11 and the second contact portion 12 is 6 to 10 μm. In this embodiment, 8 μm is preferred.

[0029] Please refer to the appendix. Figure 1 Appendix Figure 2 In one preferred embodiment, the plum blossom contact further includes a spring 3 sleeved on the outside of each pair of contact pieces. In this embodiment, preferably, four springs 3 are provided on the plum blossom contact.

[0030] Please refer to the appendix. Figure 1 In one preferred embodiment, the plum blossom contact includes two support rings 2 arranged vertically opposite each other, and a reinforcing support column 4 is connected between the two support rings 2. In this embodiment, preferably, three support columns 4 are connected between the two support rings 2. However, those skilled in the art should understand that in other embodiments, other numbers of support columns 4 may be provided between the two support rings 2, and the embodiment is not limited to the specific implementation disclosed in this embodiment.

[0031] Please refer to the appendix. Figure 1 Appendix Figure 2 An embodiment of this utility model also provides a vacuum circuit breaker, including any of the above-described plum blossom contacts.

[0032] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A plum blossom-shaped contact, characterized in that: It includes several aluminum contact pieces (1) mounted on the support ring (2). Each aluminum contact piece (1) is combined in pairs to form a contact piece group. Each contact piece group is evenly arranged in a ring on the support ring (2), and there are no gaps between the inner ends of adjacent contact piece groups.

2. The plum blossom contact according to claim 1, characterized in that: 24 aluminum contact pieces (1) are installed on the support ring (2). The 24 aluminum contact pieces (1) are combined in pairs to form 12 contact piece groups. The 12 contact piece groups are arranged in a ring-shaped central symmetrical arrangement on the support ring (2).

3. The plum blossom contact according to claim 2, characterized in that: The inner ends of adjacent contact pieces are configured to be closely adjacent, thereby forming a complete circular contact structure without gaps.

4. The plum blossom contact according to claim 3, characterized in that: The thickness of the aluminum contact (1) is 3mm.

5. The plum blossom contact according to any one of claims 1 to 4, characterized in that: The aluminum contact piece (1) is a contact piece structure made of 6063 aluminum alloy.

6. The plum blossom contact according to any one of claims 1 to 4, characterized in that: A first contact portion (11) and a second contact portion (12) are formed at the inner end of the aluminum contact piece (1), and the surfaces of the first contact portion (11) and the second contact portion (12) are provided with a silver plating layer.

7. The plum blossom contact according to claim 6, characterized in that: The thickness of the silver plating layer on the surface of the first contact part (11) and the second contact part (12) is 6-10 μm.

8. The plum blossom contact according to any one of claims 1 to 4, characterized in that: The plum blossom contact also includes a spring (3) sleeved on the outside of each pair of contact pieces.

9. The plum blossom contact according to any one of claims 1 to 4, characterized in that: The plum blossom contact includes two support rings (2) arranged vertically opposite each other, and a reinforcing support column (4) is connected between the two support rings (2).

10. A vacuum circuit breaker, characterized in that: Includes the plum blossom contact as described in any one of claims 1 to 9.

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