Rapid arc extinguishing structure for disconnecting switch
By designing the cutting and extension structure in the arc extinguishing room of the isolating switch, cutting the arc into two sections and guiding small current, the problems of slow arc extinguishing speed and difficult transmission of small current in the prior art are solved, and the effect of rapid arc extinguishing and normal operation is achieved.
Patent Information
- Application Number
- CN202421872037.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-05
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-08-05
AI Technical Summary
The existing isolating switch has a slow arc extinguishing speed when extinguishing the arc, especially in the case of small current, the arc at the moving contact end cannot be transmitted to the moving contact arc-induced plate, affecting normal operation.
A rapid arc extinguishing structure is designed, including static contacts, dynamic contacts and partition structures in the arc extinguishing chamber. The partition structure consists of a cutting structure and an extension structure. The cutting structure uses a U-shaped plate to cut the arc into two sections, and the extension structure guides a small current through the inclined section.
By cutting the arc into two sections, the arc length is reduced, and the arc extinguishing is performed at the same time between the arcs, thereby significantly increasing the arc extinguishing speed and ensuring that it can work normally under small current conditions.
Smart Images
Figure CN222927335U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of electricity, and particularly relates to a rapid arc extinguishing structure for a disconnector. Background Art
[0002] A disconnector is an electrical device in a power system, mainly used to isolate the power supply to ensure that the electrical equipment is de-energized during maintenance or repair, thus ensuring the safety of personnel and equipment and facilitating the maintenance, repair or replacement of electrical equipment.
[0003] In the existing disconnector, the arc between the static contact arc guide plate and the moving contact arc guide plate is extinguished through the arc extinguishing grid during arc extinguishing. However, due to the large number of arc extinguishing grids passed through and the long distance between the static contact arc guide plate and the moving contact arc guide plate, the rising speed of the arc is slow, resulting in a slow arc extinguishing speed. At the same time, in the case of small current, the arc at the moving contact end cannot be transmitted to the moving contact arc guide plate, thus affecting its normal operation. Summary of the Utility Model
[0004] The main technical problem to be solved by the utility model is to provide a rapid arc extinguishing structure for a disconnector, which can improve the arc extinguishing speed.
[0005] To solve the above technical problem, a technical solution adopted by the utility model is: a rapid arc extinguishing structure for a disconnector, including a static contact, a moving contact and an arc extinguishing chamber. The static contact and the moving contact are arranged near the arc extinguishing chamber, and a partition structure is arranged in the arc extinguishing chamber;
[0006] The partition structure includes a cutting structure for blocking the arc and an extending structure for guiding small current.
[0007] In a preferred embodiment of the utility model, the cutting structure includes a U-shaped plate, which is arranged at the bottom of several arc extinguishing grids in the arc extinguishing chamber, and the tops of both ends of the U-shaped plate are connected to the bottoms of two adjacent arc extinguishing grids close to the middle among the several arc extinguishing grids.
[0008] In a preferred embodiment of the utility model, several arc extinguishing grids are arranged in a stepped form.
[0009] In a preferred embodiment of the utility model, the static contact is installed in the disconnector housing through upper and lower brackets, and a static contact arc guide plate is installed between the static contact and the upper bracket.
[0010] In a preferred embodiment of the present utility model, the static contact arcing plate includes a first vertical section, a first inclined section, and a mounting section. The first vertical section, the first inclined section, and the mounting section are connected in sequence from top to bottom. The mounting section is mounted between the static contact and the upper bracket, and the first vertical section is arranged in parallel with the leftmost arc extinguishing grid.
[0011] In a preferred embodiment of the present utility model, the extension structure includes a moving contact arcing plate. The moving contact arcing plate includes a second vertical section and a second inclined section. The second vertical section is arranged in parallel with the rightmost arc extinguishing grid, and the bottom of the second inclined section is close to the top of the moving contact.
[0012] In a preferred embodiment of the present utility model, the second inclined section inclines towards the rightmost arc extinguishing grid, and the included angle between the second inclined section and the arc extinguishing grid is less than 40°.
[0013] In a preferred embodiment of the present utility model, both the bottom of the inclined end and the bottom of the U-shaped plate are provided with arc chamfers.
[0014] The beneficial effect of the present utility model is as follows: A fast arc extinguishing structure for a disconnector of the present utility model has a partition structure. By cutting the original arc into two sections, the arc length is reduced, and the two arcs extinguish the arc simultaneously, thereby improving the arc extinguishing speed. Description of the Drawings
[0015] Figure 1 It is a schematic structural diagram of a fast arc extinguishing structure for a disconnector.
[0016] Figure 2 It is Figure 1 A cross-sectional view during installation.
[0017] The marks of each component in the drawings are as follows: 1. Bracket; 2. Static contact; 3. Static contact arcing plate; 4. Moving contact; 5. Moving contact arcing plate; 6. Arc extinguishing chamber; 7. Arc extinguishing grid; 8. U-shaped plate; 9. Arc chamfer. Detailed Embodiments
[0018] The following elaborates on the preferred embodiments of the present utility model in conjunction with the drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model.
[0019] Please refer to Figure 1 and Figure 2 , the embodiments of the present utility model include:
[0020] A fast arc extinguishing structure for a disconnector, comprising a static contact 2, a moving contact 4 and an arc extinguishing chamber 6. The static contact 2 and the moving contact 4 are arranged near the arc extinguishing chamber 6. A partition structure is provided in the arc extinguishing chamber 6. By cutting the original arc into two segments, the arc length is reduced, and the two segments of the arc extinguish the arc simultaneously, thereby improving the arc extinguishing speed.
[0021] The partition structure includes a cutting structure for blocking the arc and an extending structure for guiding small current.
[0022] The cutting structure includes a U-shaped plate 8. The U-shaped plate 8 is arranged at the bottom of a plurality of arc extinguishing grid sheets 7 in the arc extinguishing chamber 6. The tops of both ends of the U-shaped plate 8 are connected to the bottoms of two adjacent arc extinguishing grid sheets 7 near the middle among the plurality of arc extinguishing grid sheets 7. The U-shaped plate 8 cuts the long arc rising due to its own heat between the static contact arc guiding plate 3 and the moving contact arc guiding plate 5 into two segments, so that two short arcs are respectively formed between the static contact arc guiding plate 3 and the left side of the U-shaped plate 8, and between the moving contact arc guiding plate 5 and the right side of the U-shaped plate 8, reducing the arc length. The two segments of the arc extinguish the arc simultaneously, thereby improving the arc extinguishing speed.
[0023] The plurality of arc extinguishing grid sheets 7 are arranged in a stepped form to match the lengths of the static contact arc guiding plate 3 and the moving contact arc guiding plate 5, so that the two segments of the cut arc can rise simultaneously between the static contact arc guiding plate 3 and the left side of the U-shaped plate 8, and between the moving contact arc guiding plate 5 and the right side of the U-shaped plate 8 respectively.
[0024] The static contact 2 is installed in the disconnector housing through upper and lower brackets 1. A static contact arc guiding plate 3 is installed between the static contact 2 and the upper bracket 1. The static contact arc guiding plate 3 includes a first vertical section, a first inclined section and an installation section. The first vertical section, the first inclined section and the installation section are connected in sequence from top to bottom. The installation section is installed between the static contact 2 and the upper bracket 1. The first vertical section is arranged parallel to the leftmost arc extinguishing grid sheet 7, and is arranged in multiple sections to reduce the moving speed of the arc at the static contact arc guiding plate 3, so that it is the same as the moving speed of the arc of the moving contact arc guiding plate 5 before cutting and the arc on the left side of the U-shaped plate 8 after cutting.
[0025] The extending structure includes a moving contact arc guiding plate 5. The moving contact arc guiding plate 5 includes a second vertical section and a second inclined section. The second vertical section is arranged parallel to the rightmost arc extinguishing grid sheet 7. The bottom of the second inclined section is close to the top of the moving contact 4, and the second inclined section inclines towards the rightmost arc extinguishing grid sheet 7.
[0026] An arc chamfer 9 is provided at the bottom of both the inclined end and the bottom of the U-shaped plate 8. Since the electric arc is always perpendicular to the contact surface during transmission, the arc chamfer 9 can facilitate the transmission of the electric arc more conveniently. When the angle between the second inclined section and the arc extinguishing grid 7 is less than 40° and the arc chamfer 9 is provided at the bottom of the inclined end, the electric arc at low current can also be transmitted from the top of the moving contact 4 to the moving contact arc ignition plate 5.
[0027] Different from the prior art, a rapid arc extinguishing structure for a disconnector according to the present utility model has a partition structure. By cutting the original electric arc into two segments, the arc length is reduced, and the two segments of the electric arc are extinguished simultaneously, thereby improving the arc extinguishing speed.
[0028] In the description of the present utility model, it should be noted that the components are all common standard components or components known to those skilled in the art. Their structures and principles can all be learned by those skilled in the art through technical manuals or through conventional test methods. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present utility model.
[0029] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present utility model by the same token.
Claims
1. A fast arc extinguishing structure for an isolating switch, comprising a static contact, a moving contact and an arc extinguishing chamber, wherein the static contact and the moving contact are arranged near the arc extinguishing chamber, and characterized in that: A partition structure is provided in the arc extinguishing chamber; The isolation structure comprises a cutting structure for interrupting an arc and an extending structure for guiding a small current.
2. A fast arc extinguishing structure for an isolating switch according to claim 1, characterized in that: The cutting structure comprises a U-shaped plate, which is arranged at the bottom of a plurality of arc-extinguishing grids in the arc-extinguishing chamber, and the tops at both ends of the U-shaped plate are connected to the bottoms of two adjacent arc-extinguishing grids near the middle of the plurality of arc-extinguishing grids.
3. A fast arc extinguishing structure for an isolating switch according to claim 2, characterized in that; A plurality of arc-extinguishing grids are arranged in a stepped form.
4. A fast arc extinguishing structure for an isolating switch according to claim 2, characterized in that: The static contact is installed in the isolating switch housing through upper and lower brackets, and a static contact arc-starting plate is installed between the static contact and the upper bracket.
5. A fast arc extinguishing structure for an isolating switch according to claim 4, characterized in that: The static contact arc-striking plate includes a first vertical section, a first inclined section and a mounting section, wherein the first vertical section, the first inclined section and the mounting section are sequentially connected from top to bottom, and the mounting section is installed between the static contact and the upper bracket, and the first vertical section is arranged parallel to the arc-extinguishing grid on the far left.
6. A rapid arc extinguishing structure for an isolating switch according to claim 2, characterized in that: The extension structure includes a moving contact arc-starting plate, which includes a second vertical section and a second inclined section. The second vertical section is arranged parallel to the arc-extinguishing grid on the far right, and the bottom of the second inclined section is close to the top of the moving contact.
7. A rapid arc extinguishing structure for an isolating switch according to claim 6, characterized in that: The second inclined section is inclined toward the rightmost arc-extinguishing grid, and an included angle between the second inclined section and the arc-extinguishing grid is less than 40°.
8. A rapid arc extinguishing structure for an isolating switch according to claim 6, characterized in that: The bottom of the inclined end and the bottom of the U-shaped plate are both provided with arc chamfers.