Arc extinguishing device of disconnecting switch
By using magnets and arc-induced plates in the arc-extinguishing device of the isolating switch, the arc acceleration is driven into the arc-extinguishing grid, which solves the problem that the arc-extinguishing is difficult to quickly extinguish the arc in the prior art, and achieves a more efficient arc-extinguishing effect and extends the service life of the contacts.
Patent Information
- Application Number
- CN202421259244.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-04
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-06-04
AI Technical Summary
When an existing isolation switch is generated, it is difficult to quickly enter the arc extinguishing chamber, resulting in poor arc extinguishing effect and prone to ablation of dynamic and static contacts.
An arc extinguishing device is designed, by setting a magnet and an arc-induced arc plate in the bent part, the generated magnetic field is used to drive the arc to accelerate into the arc extinguishing grid, and quickly achieves arc extinguishing under the guidance of the arc-induced arc plate.
The rapid arc extinguishing of the arc is achieved, the arc extinguishing effect is improved, and the static contacts and moving contacts are avoided severe ablation.
Smart Images
Figure CN222546204U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of isolating switches, in particular to an arc extinguishing device for isolating switches. Background Art
[0002] An isolating switch is an electrical device used to isolate or cut off power in a circuit. It is usually used to ensure safe operation and maintenance of electrical equipment. In a few cases, it also has the function of load disconnection. When disconnecting with load, an arc will be generated between the moving and static contacts. The arc can easily burn the moving and static contacts, so an arc extinguishing chamber is usually installed to extinguish the arc.
[0003] The existing isolating switch has a weak driving force for the arc, and the arc is difficult to quickly enter the arc extinguishing chamber for arc extinguishing. The arc extinguishing effect is poor, which easily causes the moving and static contacts to be burned by the arc. Utility Model Content
[0004] The purpose of the utility model is to provide an arc extinguishing device for an isolating switch to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an arc extinguishing device for an isolating switch, comprising a base, a static bracket fixedly mounted on the base, and a moving bracket movably mounted on the base, the static bracket being provided with a wiring frame, a static contact being mounted inside the wiring frame, a moving contact being mounted on the moving bracket, a bending portion being provided at one end of the static contact away from the wiring frame, an arc-starting plate being provided at one end of the bending portion, a static contact being provided on one side of the bending portion, a magnet being mounted between the moving contact and the moving bracket, and a moving contact being provided on the moving contact to match the static contact.
[0006] As a preferred solution of the utility model, an arc extinguishing chamber bracket is fixedly connected to the top of the base, and arc extinguishing grids distributed along the moving direction of the moving contact are installed on the inner side of the arc extinguishing chamber bracket.
[0007] As a preferred solution of the utility model, the arc-extinguishing grids are evenly distributed on the inner side of the arc-extinguishing chamber bracket.
[0008] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model generates a magnetic field when current flows through the curved portion through the arranged curved portion, and the magnetic field drives the arc to accelerate into the arc extinguishing grid, and the magnetic field of the magnet can also drive the arc to accelerate into the arc extinguishing grid, and at the same time, under the guidance of the arc starting plate, the arc can enter the arc extinguishing grid more quickly and effectively, thereby playing a multiple guiding role on the arc, achieving rapid arc extinguishing, improving arc extinguishing effect, and avoiding serious burning of the static contact and the moving contact. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1It is a three-dimensional structural schematic diagram of the utility model;
[0010] Figure 2 It is a schematic diagram of the structure of the utility model after the arc extinguishing grid and the arc extinguishing chamber bracket are disassembled;
[0011] Figure 3 For this utility model Figure 2 The enlarged view of point A in the middle;
[0012] Figure 4 This is a schematic diagram of the structure of the dynamic bracket of the utility model;
[0013] Figure 5 It is a structural schematic diagram of the bending portion of the utility model.
[0014] In the figure: 1. base; 2. moving bracket; 3. static bracket; 4. wiring frame; 5. arc extinguishing grid; 6. arc extinguishing chamber bracket; 7. static contact; 8. magnet; 9. bending part; 10. moving contact; 11. moving contact; 12. arc starting plate; 13. static contact. DETAILED DESCRIPTION
[0015] 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.
[0016] See also Figures 1 to 5The utility model provides a technical solution: an arc extinguishing device for an isolating switch, comprising a base 1, a static bracket 3 fixedly mounted on the base 1, and a dynamic bracket 2 movably mounted on the base 1, a wiring frame 4 is arranged on the static bracket 3, the wiring frame 4 is used to connect external wires, a static contact 7 is installed inside the wiring frame 4, a dynamic contact 11 is installed on the dynamic bracket 2, a bending portion 9 is arranged at one end of the static contact 7 away from the wiring frame 4, when current flows through the bending portion 9, a magnetic field is generated, and the magnetic field drives the arc to accelerate into the arc extinguishing grid 5, and under the guidance of the arc starting plate 12, the arc can enter the arc extinguishing grid 5 more quickly and effectively, and at the same time, the magnetic field of the magnet 8 can also drive the arc, so that the arc Entering the arc extinguishing grid 5, under multiple actions, the arc is accelerated to enter the arc extinguishing grid 5, thereby achieving rapid arc extinguishing, improving the arc extinguishing effect, and avoiding serious ablation of the static contact 7 and the moving contact 11. An arc-starting plate 12 is provided at one end of the bent portion 9, and a static contact 13 is provided on one side of the bent portion 9. A magnet 8 is installed between the moving contact 11 and the moving bracket 2. A moving contact 10 that matches the static contact 13 is provided on the moving contact 11. The moving contact 10 and the static contact 13 make the contact surface smoother to improve the reliability and stability of the contact between the moving contact 11 and the static contact 7, and the moving contact 10 and the static contact 13 can reduce the wear and ablation of the moving contact 11 and the static contact 7, thereby extending their service life.
[0017] Among them, the top of the base 1 is fixedly connected with an arc extinguishing chamber bracket 6, and the inner side of the arc extinguishing chamber bracket 6 is installed with arc extinguishing grids 5 distributed along the movement direction of the moving contact 11. The arc extinguishing grids 5 are distributed along the movement direction of the moving contact 11 to improve the arc extinguishing effect of the arc extinguishing grids 5.
[0018] Among them, the arc-extinguishing grids 5 are evenly distributed on the inner side of the arc-extinguishing chamber bracket 6. The evenly distributed arc-extinguishing grids 5 ensure that the arc can be evenly divided into multiple segments, the length of each short arc is similar, all short arcs can be extinguished at the same time, and the evenly distributed arc-extinguishing grids 5 can provide a relatively uniform heat dissipation area, ensuring that the arc heat can be effectively dissipated, further reducing the possibility of arc reignition.
[0019] 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.
[0020] 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.
[0021] 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.
[0022] 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 device for an isolating switch, comprising a base (1), a stationary support (3) fixedly mounted on the base (1), and a moving support (2) movably mounted on the base (1), wherein a wiring frame (4) is provided on the stationary support (3), a stationary contact (7) is mounted inside the wiring frame (4), and a moving contact (11) is mounted on the moving support (2), characterized in that: A bent portion (9) is provided at one end of the static contact (7) away from the wiring frame (4), an arc-starting plate (12) is provided at one end of the bent portion (9), a static contact (13) is provided on one side of the bent portion (9), a magnet (8) is installed between the moving contact (11) and the moving bracket (2), and a moving contact (10) matching the static contact (13) is provided on the moving contact (11).
2. The arc extinguishing device of the isolating switch according to claim 1, characterized in that: An arc extinguishing chamber support (6) is fixedly connected to the top of the base (1), and arc extinguishing grids (5) distributed along the moving direction of the moving contact (11) are installed on the inner side of the arc extinguishing chamber support (6).
3. The arc extinguishing device of the isolating switch according to claim 2, characterized in that: The arc extinguishing grids (5) are distributed at equal intervals on the inner side of the arc extinguishing chamber bracket (6).