Moving contact of large-opening-distance frame circuit breaker

Abstract

The utility model discloses a large-opening-distance frame circuit breaker moving contact, which comprises a moving contact support, a left side plate, a right side plate, a plurality of contact fingers, a switching support, a bottom support and a busbar, the switching support is installed on the busbar, the two sides of the switching support are provided with upward side bends, and the side bends and the bottoms of the left and right side plates are provided with corresponding shaft holes. The whole body formed by the contact support, the left side plate, the right side plate and the plurality of contact fingers rotates around the shaft hole, the problems that the opening distance in the prior art is not large enough and the electric arc cannot be quickly extinguished are solved through the scheme, and the technical effects of increasing the opening distance and quickly extinguishing the electric arc under the condition of small change are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical equipment components, in particular to a universal circuit breaker with a large-opening frame circuit breaker moving contact. Background Art

[0002] With the continuous development of the new energy industry, the performance requirements for distribution switches are getting higher and higher. Usually, AC needs to meet the breaking performance of 1140V, and DC needs the breaking performance of 1500V and above. The traditional frame-type circuit breaker structure on the market is a contact system such as the one published in the patent document with the authorization announcement number CN204257451 U. Figure 4 The prior art moving contact assembly 14 rotates around the prior art moving contact assembly shaft 15, and the prior art moving contact assembly 14 is connected to the mechanism cantilever 16 through the connecting rod 18. The mechanism cantilever 16 rotates around the mechanism cantilever shaft 17. The opening distance 13 of the moving contact after opening is usually about 32 mm, and the arc cannot be extinguished quickly. It is difficult to reliably meet the requirements of the new energy industry, and its performance improvement is imminent. Utility Model Content

[0003] In view of the deficiencies of the prior art, the utility model provides a moving contact of a frame circuit breaker with a large opening distance, so as to solve the problem that the opening distance is not large enough and the arc cannot be extinguished quickly in the prior art.

[0004] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0005] A moving contact of a large-opening frame circuit breaker comprises a moving contact support, a left side plate, a right side plate, a plurality of contact fingers, a bottom bracket, an adapter bracket and a busbar, wherein the plurality of contact fingers are mounted on the contact support, and the contact support is respectively mounted with a left side plate and a right side plate on the left and right sides, an axial hole is opened at the same position at the bottom of the left side plate and the right side plate, and the bottom bracket is mounted on the bottom of the busbar, and the flat bottom of the adapter bracket is provided with side bends facing upward on both sides, and the side bends are provided with axial holes corresponding to the axial holes on the left side plate and the right side plate, and the moving contact support, the left side plate, the right side plate and the contact fingers are integrally mounted in the axial holes on the side bends of the adapter bracket through the axial holes, and the flat bottom of the adapter bracket is provided with no less than two fastener fixing holes, and the front of the busbar and the flat bottom of the bottom bracket are provided with fastener fixing holes corresponding to the number of positions of the fastener fixing holes on the flat bottom of the adapter bracket, and the adapter bracket is fixedly connected to the front of the busbar and the bottom bracket in sequence through the fastener fixing holes.

[0006] Preferably, the adapter bracket is a split structure, including an L-shaped lower bracket and an L-shaped upper bracket, and the flat bottom portions of the lower bracket and the upper bracket overlap.

[0007] Preferably, there are two fastener fixing holes.

[0008] Preferably, the fasteners use bracket screws and bracket nuts.

[0009] Preferably, the bracket screw uses a pan head screw.

[0010] Preferably, the shaft hole uses side plate rivets to respectively connect the adapter bracket and the left side plate and to connect the adapter bracket and the right side plate.

[0011] Preferably, the bottom bracket is made of aluminum.

[0012] Preferably, a sunken step is provided on the front upper surface of the busbar.

[0013] Preferably, at least one threaded screw hole is provided on each side of the moving contact support, and screw holes corresponding to the number and position of the threaded screw holes are opened on the left plate and the right plate, and the left plate and the right plate are fastened to the moving contact support by passing side plate screws through the screw holes.

[0014] Preferably, the fastener fixing hole of the bottom bracket is a threaded hole.

[0015] The moving contact of the large-opening frame circuit breaker proposed in the present application shortens the distance between the connecting rod and the moving contact's rotation center by raising the moving contact's rotation center while keeping the cantilever size of the mechanism unchanged, the rotation angle and the initial position unchanged, and the size and position of the static contact unchanged. With a relatively small modification, the rotation angle of the moving contact assembly is increased during the opening process, thereby achieving an effect of increasing the opening distance, so that the arc can be elongated when it is generated, thereby achieving the purpose of rapid extinguishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an exploded schematic diagram of an embodiment of a moving contact of a large-opening frame circuit breaker;

[0017] Figure 2 A stereoscopic diagram of an embodiment of a movable contact of a large-opening frame circuit breaker after assembly;

[0018] Figure 3 It is a side view schematic diagram of an embodiment of a moving contact of a large-opening frame circuit breaker;

[0019] Figure 4 It is a side view schematic diagram of a movable contact of a frame breaker in the prior art;

[0020] Among them, 1-moving contact support, 2-left side plate, 3-right side plate, 4-contact finger, 5-lower bracket, 6-upper bracket, 7-bottom bracket, 8-busbar, 9-side panel screw, 10-bracket screw, 11-bracket nut, 12-side panel rivet, 13-opening distance, 14-existing moving contact assembly, 15-existing moving contact assembly shaft, 16-mechanism cantilever, 17-mechanism cantilever shaft, 18-connecting rod. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] The present embodiment provides a technical solution: the moving contact of the large-opening frame circuit breaker of the utility model comprises a moving contact support 1, a left side plate 2, a right side plate 3, a plurality of contact fingers 4, an adapter bracket, a bottom bracket 7 and a busbar 8, the plurality of contact fingers 4 are installed on the contact support 1, the left side plate 2 and the right side plate 3 are respectively installed on the left and right sides of the contact support 1, at least one threaded screw hole is arranged on each side of the moving contact support 1, the left side plate 2 and the right side plate 3 are provided with screw holes corresponding to the number and position of the threaded screw holes, and the left side plate 2 and the right side plate 3 are fastened to the moving contact support 1 by passing the side plate screws 9 through the screw holes.

[0023] The left side plate 2 and the right side plate 3 have an axial hole at the same position at the bottom, the bottom bracket 7 is made of aluminum and installed at the bottom of the front of the busbar 8, the flat bottom of the adapter bracket is provided with side bends on both sides facing upward, and the side bends are provided with axial holes corresponding to the axial holes on the left side plate 2 and the right side plate 3, and the moving contact support 1, the left side plate 2, the right side plate 3 and the contact finger 4 are integrally mounted in the axial hole on the side bend of the adapter bracket through the axial hole, and the axial hole is used as the new elevated rotation center of the moving contact assembly. In order to facilitate the installation of the adapter bracket and the left side plate 2 and the right side plate 3, the adapter bracket described in this embodiment is a split structure, including an L-shaped lower bracket 5 and an L-shaped upper bracket 6, and the flat bottom parts of the lower bracket 5 and the upper bracket 6 overlap, and the axial holes in this embodiment use side plate rivets 12 to respectively connect the lower bracket 5 and the left side plate 2 and the upper bracket 6 and the right side plate 3. In order to prevent interference with the rotation of the overall assembly, the front end of the busbar is notched, and a sunken step is provided on the upper surface of the front of the busbar 8 in this embodiment. Through the above improvements, the structure of the present application increases the opening distance by 25%.

[0024] No less than two fastener fixing holes are opened on the flat bottom of the upper bracket 6 and the lower bracket 5. The present embodiment uses two fastener fixing holes. Fastener fixing holes corresponding to the number of fastener fixing holes on the flat bottom of the adapter bracket are opened on the flat bottom of the front of the busbar 8 and the bottom bracket 7. The adapter bracket is fixedly connected to the front of the busbar 8 and the bottom bracket 7 in sequence through the fastener fixing holes. The fasteners use bracket screws 10 and bracket nuts 11. The bracket screws 10 use pan head screws, i.e., two pan head screws, which pass through the upper bracket 6, the lower bracket 5, the busbar 8, and the bottom bracket 7 from the top to the bottom in turn, and are fastened with the bracket nuts 11 at the lower end. The fastener fixing holes of the bottom bracket 7 can also be set as threaded holes, thereby eliminating the bracket nuts 11 at the lower end.

[0025] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and 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 orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A moving contact of a large-opening frame circuit breaker, comprising a moving contact support (1), a left side plate (2), a right side plate (3), a plurality of contact fingers (4), a bottom bracket (7) and a busbar (8), wherein the plurality of contact fingers (4) are mounted on the contact support (1), the left side plate (2) and the right side plate (3) are respectively mounted on the left and right sides of the contact support (1), an axial hole is opened at the same position at the bottom of the left side plate (2) and the right side plate (3), and the bottom bracket (7) is mounted on the bottom of the busbar (8), characterized in that: The adapter bracket also includes an adapter bracket, the flat bottom of the adapter bracket is provided with side bends facing upward on both sides, the side bends are provided with axial holes corresponding to the axial holes on the left side plate (2) and the right side plate (3), the moving contact support (1), the left side plate (2), the right side plate (3) and the contact finger (4) are an integral component rotatably mounted in the axial hole on the side bend of the adapter bracket through the axial hole, the flat bottom of the adapter bracket is provided with no less than two fastener fixing holes, the front of the busbar (8) and the flat bottom of the bottom bracket (7) are provided with fastener fixing holes corresponding to the number of the positions of the fastener fixing holes on the flat bottom of the adapter bracket, and the adapter bracket is fixedly connected to the front of the busbar (8) and the bottom bracket (7) in sequence through the fastener fixing holes.

2. The movable contact of the large-spacing frame circuit breaker according to claim 1 is characterized in that: The adapter bracket is a split structure, comprising an L-shaped lower bracket (5) and an L-shaped upper bracket (6), and the flat bottom portions of the lower bracket (5) and the upper bracket (6) overlap.

3. The movable contact of the large-spacing frame circuit breaker according to claim 1 is characterized in that: The number of the fastener fixing holes is two.

4. The movable contact of the large-spacing frame circuit breaker according to claim 1 is characterized in that: The fasteners use a bracket screw (10) and a bracket nut (11).

5. The moving contact of the large-spacing frame circuit breaker according to claim 4 is characterized in that: The bracket screw (10) uses a pan head screw.

6. The movable contact of the large-spacing frame circuit breaker according to claim 1 is characterized in that: The shaft hole uses a side plate rivet (12) to respectively connect the adapter bracket and the left side plate (2) and to connect the adapter bracket and the right side plate (3).

7. The movable contact of the large-spacing frame circuit breaker according to claim 1, characterized in that: The bottom bracket (7) is made of aluminum.

8. The movable contact of the large-spacing frame circuit breaker according to claim 1, characterized in that: The front upper surface of the busbar (8) is provided with a sunken step.

9. The movable contact of the large-spacing frame circuit breaker according to claim 1, characterized in that: At least one threaded screw hole is provided on each side of the moving contact support (1); screw holes corresponding to the number and position of the threaded screw holes are provided on the left side plate (2) and the right side plate (3); the left side plate (2) and the right side plate (3) are fastened to the moving contact support (1) by passing side plate screws (9) through the screw holes.

10. The movable contact of the large-spacing frame circuit breaker according to claim 1, characterized in that: The fastener fixing hole of the bottom bracket (7) is a threaded hole.

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