Arc extinguish chamber for circuit breaker
By designing arc-extinguishing grid and arc-induced plates of arc-shaped path arrays in the circuit breaker, the problem of poor arc-extinguishing effect of existing circuit breakers is solved, and a more efficient arc-extinguishing effect is achieved.
Patent Information
- Application Number
- CN202421401456.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-19
AI Technical Summary
The existing circuit breakers have poor arc extinguishing effect, and the arc cannot enter the arc extinguishing chamber quickly and evenly, resulting in incomplete arc extinguishing.
An arc extinguishing chamber for circuit breaker is designed, including two symmetrically placed side plates, an arc extinguishing grid with an arc path array is installed between the side plates. The arc extinguishing grid is arranged in an inclined manner at 30°, and a Y-shaped groove is opened in the middle of the rear grating plate to form an arc extinguishing groove. At the same time, an arc-induced grid is installed above the side plate to promote arc entry.
Through the design of the arc-extinguishing grid and arc-induced plate arranged in the arc-shaped path, the motion trajectory of the moving contacts is consistent with the arc-extinguishing groove, which significantly improves the arc-extinguishing efficiency and effect.
Smart Images
Figure CN222672948U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuit breakers, in particular to an arc extinguishing chamber for a circuit breaker. Background Art
[0002] A circuit breaker is a switching device that can close, carry and interrupt current under normal circuit conditions and can close, carry and interrupt current under abnormal circuit conditions within a specified time. It is generally composed of a contact system, arc extinguishing system, operating mechanism, release, casing, etc.
[0003] The function of the circuit breaker is to cut off and connect the load circuit, as well as to cut off the fault circuit, to prevent the accident from expanding and to ensure safe operation. The high-voltage circuit breaker has to break the arc of 1500V and the current of 1500-2000A. These arcs can be stretched to 2m and still continue to burn. Therefore, arc extinguishing is a problem that must be solved by high-voltage circuit breakers. When extinguishing the arc, it is usually necessary to wait until the arc is blown into the arc extinguishing chamber before extinguishing the arc.
[0004] However, the existing circuit breakers are usually composed of two side plates and a plurality of arc extinguishing grids, and the grids are arranged longitudinally, so the arc cannot enter the arc extinguishing chamber quickly and evenly, and the arc extinguishing effect is poor. Utility Model Content
[0005] The purpose of the utility model is to provide an arc extinguishing chamber for a circuit breaker to solve the problems raised in the above background technology.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an arc extinguishing chamber for a circuit breaker, comprising two symmetrically arranged side plates, arc extinguishing grids are installed in an arc path array near the top side edge position between the two side plates, and the arc extinguishing grids are arranged at an inclination of 30°, the arc extinguishing grids include a front grid and a rear grid, a Y-shaped groove is opened in the middle of the rear grid, the groove penetrates into the interior of the front grid, and a plurality of the grooves are arranged to form an arc extinguishing groove, and an arc-starting plate is installed between the two side plates and above the side plates.
[0007] As a preferred solution of the utility model, the adjacent arc-extinguishing grids are arranged alternately, one positive and one negative.
[0008] As a preferred solution of the utility model, the arc-starting piece is inclined at 30°.
[0009] As a preferred solution of the utility model, a card slot is provided inside the two side panels.
[0010] As a preferred solution of the utility model, first clamping pins are fixedly connected to both sides of the rear grid plate, and second clamping pins are fixedly connected to both sides of the arc-starting plate, and both the first clamping pin and the second clamping pin are installed in cooperation with the clamping slots.
[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model arranges the arc extinguishing grids in an arc-shaped path in an orderly manner, so that the grooves on the multiple arc extinguishing grids can form an arc extinguishing groove, and the movement trajectory of the moving contact is consistent with the arc extinguishing groove, which can better extinguish the arc, and the arc-starting plate can enable the arc to enter the grid more quickly and effectively, further improving the arc extinguishing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the arc extinguishing trough structure of the utility model;
[0013] Figure 2 It is a three-dimensional diagram of the utility model;
[0014] Figure 3 It is a cross-sectional view of the utility model;
[0015] Figure 4 It is a three-dimensional diagram of the arc-extinguishing grid of the utility model;
[0016] Figure 5 It is a three-dimensional diagram of the arc-starting piece of the utility model.
[0017] In the figure: 1, side plate; 2, arc extinguishing grid; 21, front grid; 22, rear grid; 3, groove; 4, first clamping foot; 5, arc striking plate; 6, second clamping foot; 7, arc extinguishing groove; 8, clamping groove. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.
[0019] See also Figures 1 to 5The utility model provides a technical solution: an arc extinguishing chamber for a circuit breaker, comprising two symmetrically arranged side plates 1, arc extinguishing grids 2 are installed in an arc path array near the top side position between the two side plates 1, the first arc extinguishing grid 2 is at the edge of the side plate 1, the position of the last arc extinguishing grid 2 is moved back by one third of the width of the side plate 1 compared with the position of the first arc extinguishing grid 2, and the arc extinguishing grid 2 is inclined at 30°, the arc extinguishing grid 2 comprises a front grid 21 and a rear grid 22, the front grid 21 and the rear grid 22 are integrally formed, a Y-shaped groove 3 is opened in the middle of the rear grid 22, the groove 3 penetrates into the interior of the front grid 21, and a plurality of grooves 3 are arranged to form an arc extinguishing groove 7, an arc striking plate 5 is installed between the two side plates 1 and above the side plates 1, the middle part of the arc striking plate 5 is an upward folding structure, and the arc striking plate 5 can promote the arc to enter the grid more quickly and effectively, and the two upper and lower adjacent arc extinguishing grids 2 are arranged in a row with opposite installation directions.
[0020] The arc-striking piece 5 is arranged at an inclination of 30°. The arc-striking piece 5 is arranged in front of the arc path of the first arc-extinguishing grid piece 2 , which is the same as the entire row path of the arc-extinguishing grid pieces 2 .
[0021] The two side plates 1 are both provided with a clamping groove 8 inside, and the clamping groove 8 can be used to install the arc extinguishing grid 2 and the arc striking plate 5 on the side plates 1 .
[0022] Among them, the first clamping pins 4 are fixedly connected on both sides of the rear grid plate 22, and the second clamping pins 6 are fixedly connected on both sides of the arc-striking plate 5. The first clamping pins 4 and the second clamping pins 6 are both installed in cooperation with the slots 8. The first clamping pins 4 can facilitate the arc-extinguishing grid plate 2 and the arc-striking plate 5 to be more stably inserted into the slots 8.
[0023] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations 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 operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0024] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.
[0025] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.
[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An arc extinguishing chamber for a circuit breaker, comprising two symmetrically arranged side plates (1), characterized in that: Arc extinguishing grids (2) are installed in an arc-shaped path array near the top side edge between the two side plates (1), and the arc extinguishing grids (2) are arranged at an inclination of 30 degrees. The arc extinguishing grids (2) include a front grid (21) and a rear grid (22). A Y-shaped groove (3) is provided in the middle of the rear grid (22), and the groove (3) penetrates into the interior of the front grid (21). A plurality of the grooves (3) are arranged to form an arc extinguishing groove (7). An arc-starting plate (5) is installed between the two side plates (1) and above the side plates (1).
2. The arc extinguishing chamber for a circuit breaker according to claim 1, characterized in that: The adjacent arc-extinguishing grids (2) are arranged alternately, one positive and one negative.
3. The arc extinguishing chamber for a circuit breaker according to claim 2, characterized in that: The arc-starting piece (5) is arranged at an inclination of 30°.
4. The arc extinguishing chamber for a circuit breaker according to claim 3, characterized in that: A card slot (8) is provided inside each of the two side panels (1).
5. The arc extinguishing chamber for a circuit breaker according to claim 4, characterized in that: The rear grid plate (22) is fixedly connected to first clamping pins (4) on both sides, and the arc-starting plate (5) is fixedly connected to second clamping pins (6) on both sides, and the first clamping pin (4) and the second clamping pin (6) are both mounted in cooperation with the clamping slot (8).