Soft connection protection structure of frame circuit breaker

Abstract

This utility model relates to the field of contact assemblies for frame circuit breakers, and discloses a flexible connection protection structure for frame circuit breakers, including a moving contact assembly and a stationary contact assembly. The two are used together to perform their functions. When the moving contact assembly opens, the arc-blocking plate always maintains an appropriate distance from the arc-blocking cover of the stationary contact, so that the impact of the electric arc on the flexible connection structure is minimized, thereby ensuring the normal conduct of subsequent circuit breaker tests. During the opening process, the arc-blocking plate and the arc-blocking cover of the stationary contact also continue to correspond and are not completely separated. The continuous correspondence and arc blocking time is sufficient to ensure that the flexible connection structure is not burned. The rib plate array is set inside the arc-blocking plate, so that the arc-blocking plate can remain stable and not collapse even under high air pressure.

Description

Technical Field

[0001] This utility model relates to the field of contact assemblies for frame circuit breakers, specifically a soft connection protection structure for frame circuit breakers. Background Technology

[0002] Frame circuit breakers are commonly used in low-voltage power distribution systems. They are installed on the control side of the main circuit to connect and disconnect loads and protect the safety of lines and equipment.

[0003] The moving and stationary contacts are installed inside the frame circuit breaker to connect or disconnect the main circuit. When a short-circuit current is detected, the moving contact opens, and the arc generated by the moving and stationary contacts enters the arc-extinguishing chamber and is extinguished.

[0004] In existing technology, when a circuit breaker detects a fault current and operates, the arc energy between the contacts is relatively large when the moving contact opens. This can cause burn damage to the flexible connection structure beneath the moving contact, affecting subsequent circuit breaker testing. Currently, arc-damping plates are also used for protection, such as... Figure 9 As shown, during the process of the moving contact moving from the closed position to the open position, the arc-blocking plate on the moving contact separates from the arc-blocking cover on the stationary contact, so that the electric arc can still affect the soft connection structure below. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a soft connection protection structure for a frame circuit breaker to solve the aforementioned problems.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0007] A flexible connection protection structure for a frame circuit breaker includes a moving contact assembly and a stationary contact assembly, which correspond to each other. The moving contact assembly includes a moving contact body, a moving main contact, a moving contact arc-blocking cover, and a flexible connection structure. The moving main contact is located at the upper end of the moving contact body. The moving contact arc-blocking cover is connected to the moving contact body and located between the flexible connection structure and the moving main contact. The flexible connection structure is connected to the lower end of the moving contact body. The stationary contact assembly includes a stationary contact body, a stationary main contact, and a stationary contact arc-blocking cover. The stationary main contact is located at the lower end of the moving contact body. The stationary contact arc-blocking cover is connected to the stationary contact body and corresponds to the position of the moving main contact. It is used to block the electric arc generated by the moving main contact and the stationary main contact. When the moving contact assembly is opened, the arc-blocking plate always maintains an appropriate distance from the stationary contact arc-blocking cover, so that the impact of the electric arc on the flexible connection structure is minimized, thereby ensuring the normal conduct of subsequent circuit breaker tests. During the opening process, the arc-blocking plate and the stationary contact arc-blocking cover continue to correspond and are not completely separated. The continuous correspondence and arc blocking time is sufficient to ensure that the flexible connection structure is not burned.

[0008] Preferably, the moving contact arc-blocking cover includes an arc-blocking plate and a rib plate. The rib plate array is disposed inside the arc-blocking plate. The curvature of the arc-blocking plate is consistent with the movement trajectory of the moving contact opening and closing. The rib plate array is disposed inside the arc-blocking plate so that the arc-blocking plate can remain stable and not collapse even under high air pressure.

[0009] Preferably, the arc of the inner side of the stationary contact arc-blocking cover and the arc of the moving contact arc-blocking cover are matched.

[0010] Compared with the prior art, this utility model discloses a flexible connection protection structure for a frame circuit breaker, including a moving contact assembly and a stationary contact assembly. The two work together to play a role. When the moving contact assembly opens, the arc-blocking plate always maintains an appropriate distance from the stationary contact arc-blocking cover, so that the impact of the electric arc on the flexible connection structure is minimized, thereby ensuring the normal conduct of subsequent circuit breaker tests. During the opening process, the arc-blocking plate and the stationary contact arc-blocking cover continue to correspond and do not completely separate. The continuous correspondence and arc blocking time is sufficient to ensure that the flexible connection structure is not burned. The rib plate array is set inside the arc-blocking plate, so that the arc-blocking plate can remain stable and not collapse even under high air pressure. Attached Figure Description

[0011] Figure 1 This is a cross-sectional view of the internal structure of the flexible connection protection structure of the frame circuit breaker of this utility model;

[0012] Figure 2 This is a cross-sectional view of the internal structure of the flexible connection protection structure of the frame circuit breaker of this utility model;

[0013] Figure 3 This is a cross-sectional view of the internal structure of the flexible connection protection structure of the frame circuit breaker of this utility model;

[0014] Figure 4 This is a schematic diagram of the structure of the moving contact arc-blocking cover of this utility model;

[0015] Figure 5 This is a schematic diagram of the structure of the moving contact arc-blocking cover of this utility model;

[0016] Figure 6 This is a schematic diagram of the structure of the moving contact arc-blocking cover of this utility model;

[0017] Figure 7 This is a schematic diagram of the structure of the static contact arc-blocking cover of this utility model;

[0018] Figure 8 This is a schematic diagram of the structure of the static contact arc-blocking cover of this utility model;

[0019] Figure 9 This is a structural reference diagram of the prior art related to this utility model. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] A flexible connection protection structure for a frame circuit breaker includes a moving contact assembly 1 and a stationary contact assembly 2, which correspond to each other. The moving contact assembly 1 includes a moving contact body 11, a moving main contact 12, a moving contact arc-blocking cover 13, and a flexible connection structure 14. The moving main contact 12 is located at the upper end of the moving contact body 11, and the moving contact arc-blocking cover 13 is connected to the moving contact body 11 and located between the flexible connection structure 14 and the moving main contact 12. The flexible connection structure 14 is connected to the lower end of the moving contact body 11. The stationary contact assembly 2 includes a stationary contact body 21, a stationary main contact 22, and a stationary contact arc shield 23. The stationary main contact 22 is located at the upper end of the stationary contact body 21 and corresponds to the position of the moving main contact 12. The stationary contact arc shield 23 is connected to the stationary contact body 21 and corresponds to the position of the moving contact arc shield 13, and is used to block the electric arc generated by the moving main contact 12 and the stationary main contact 22.

[0022] The moving contact arc-blocking cover 13 includes an arc-blocking plate 131 and a rib plate 132. The rib plates 132 are arranged in an array inside the arc-blocking plate 131, so that the arc-blocking plate 131 can remain stable and not collapse under a large air pressure environment. The curvature of the arc-blocking plate 131 is consistent with the movement trajectory of the moving contact opening and closing.

[0023] The inner side of the stationary contact arc-blocking cover 23 and the moving contact arc-blocking cover 13 have corresponding arcs that are compatible.

[0024] When the moving contact assembly 1 opens, the arc-blocking plate 131 always maintains an appropriate distance from the stationary contact arc-blocking cover 23. This distance can be determined according to the actual working conditions. In this scheme, the distance between the arc-blocking plate 131 and the stationary contact arc-blocking cover 23 should be kept at the minimum distance that does not affect the normal opening and closing of the moving contact assembly 1 and the stationary contact assembly 2, so that the impact of the arc on the flexible connection structure 14 is minimized, thereby ensuring the normal progress of subsequent circuit breaker tests.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0027] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A flexible connection protection structure for a frame circuit breaker, characterized in that: The system includes a moving contact assembly (1) and a stationary contact assembly (2), which correspond to each other. The moving contact assembly (1) includes a moving contact body (11), a moving main contact (12), a moving contact arc shield (13), and a flexible connection structure (14). The moving main contact (12) is located at the upper end of the moving contact body (11). The moving contact arc shield (13) is connected to the moving contact body (11) and is located between the flexible connection structure (14) and the moving main contact (12). Structure (14) is connected to the lower end of the moving contact body (11). The stationary contact assembly (2) includes a stationary contact body (21), a stationary main contact (22), and a stationary contact arc shield (23). The stationary main contact (22) is located at the upper end of the stationary contact body (21) and corresponds to the position of the moving main contact (12). The stationary contact arc shield (23) is connected to the stationary contact body (21) and corresponds to the position of the moving contact arc shield (13), and is used to block the arc generated by the moving main contact (12) and the stationary main contact (22).

2. The flexible connection protection structure of the frame circuit breaker according to claim 1, characterized in that: The moving contact arc-blocking cover (13) includes an arc-blocking plate (131) and a rib plate (132). The rib plates (132) are arranged in an array inside the arc-blocking plate (131). The curvature of the arc-blocking plate (131) is consistent with the movement trajectory of the moving contact opening and closing.

3. The flexible connection protection structure of the frame circuit breaker according to claim 2, characterized in that: The arc of the inner side of the stationary contact arc shield (23) and the arc of the moving contact arc shield (13) are matched.

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