CN218585913U - Arc extinguishing grid piece group - Google Patents
Arc extinguishing grid piece group Download PDFInfo
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- CN218585913U CN218585913U CN202222364381.4U CN202222364381U CN218585913U CN 218585913 U CN218585913 U CN 218585913U CN 202222364381 U CN202222364381 U CN 202222364381U CN 218585913 U CN218585913 U CN 218585913U
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Abstract
An arc extinguishing grid group is formed by arranging a plurality of grid pieces at intervals, each grid piece comprises a base part, and the base part is an outlet end at one side back to a contact system in the advancing direction of an electric arc; the method is characterized in that: at least one grid plate in the arc extinguishing grid plate group is a special-shaped grid plate, and the special-shaped grid plate is a grid plate with an inwards concave gap arranged on the edge of the outlet end side of the base part. After the arc that opens and shuts gets into arc extinguishing bars group, the short arc that forms between the bars piece receives the lorentz force to the breach direction of indent on the heterotypic bars piece for the arc moves towards breach direction one end, makes the arc stop inside the bars piece more easily, does not stay for a long time in the income arc end position of bars piece, is favorable to the arc to be cut, improves the breaking capacity of circuit breaker.
Description
Technical Field
The utility model relates to a circuit breaker especially relates to an arc extinguishing bars piece group of circuit breaker.
Background
Low-voltage circuit breakers play a role in breaking and completing electrical circuits in distribution lines. When the line has abnormal faults, such as short circuit, the line is quickly cut off by the separation of the contact pairs, so that the equipment is prevented from being damaged. As is well known in the art, when the contacts are separated under the condition of current carrying, an arc is generated, and especially when a short-circuit large current is cut off, the energy of the arc is large, and the erosion of the contacts is serious, so that in a low-voltage circuit breaker, an arc extinguishing chamber is generally arranged to extinguish the arc, so as to ensure the safe operation of electrical equipment.
The arc extinguishing chamber is generally assembled by an arc extinguishing grid group and an insulating clamping plate, wherein the arc extinguishing grid group is formed by arranging a plurality of arc extinguishing grid pieces made of ferromagnetic materials at intervals. After the arc enters the arc chute, it will be divided into many short arcs connected in series, each short arc has a near-pole voltage drop. In the short-circuit breaking process, the grid pieces for cutting the electric arc are increased along with the opening of the contact, the voltage of the whole electric arc in the arc extinguishing chamber is gradually increased, and when the voltage of the electric arc is greater than the rated voltage of the power supply, the electric arc is extinguished.
In the prior art, each grid of the arc extinguishing grid set includes a substantially rectangular base, an arc inlet end is disposed on a side of the base facing the contact system, an outlet end is disposed on a side of the base facing away from the contact system, and an arc cutting area is disposed between the arc inlet end and the outlet end. In actual use, electric arcs are easy to stay at arc-entering positions of arc-extinguishing grid plates for a long time, and the arc-extinguishing grid plates are difficult to enter and cut, so that the ablation of contacts is serious, and even the normal connection of a circuit breaker is influenced.
Disclosure of Invention
The utility model aims at providing an arc extinguishing grid piece group solves the problem that electric arc stops for a long time easily at the income arc position of grid piece in the use.
In order to achieve the purpose, the utility model adopts the technical proposal that: an arc extinguishing grid group is formed by arranging a plurality of grid sheets at intervals, each grid sheet comprises a base part, and one side of the base part, which is back to an electric arc in the advancing direction of the electric arc, is an outlet end; at least one grid sheet in the arc extinguishing grid sheet group is a special-shaped grid sheet, and the special-shaped grid sheet is a grid sheet provided with an inwards concave notch on the edge of the outlet end side of the base part.
In the scheme, the grid plates except the special-shaped grid plates in the arc extinguishing grid plate group are defined as common grid plates, and the special-shaped grid plates and the common grid plates in the arc extinguishing grid plate group are alternately arranged at intervals. Preferably, in the arc extinguishing grid set, the special-shaped grid pieces and the common grid pieces are arranged at intervals. Or in the arc extinguishing grid group, the special-shaped grid sheets and the common grid sheets are arranged at intervals.
In the above scheme, the concave notch is U-shaped or V-shaped.
In the above scheme, one side of the base part of the grid plate, which faces the arc in the advancing direction of the arc, is an arc inlet end; the arc extinguishing grid set is characterized in that the grid pieces except the special-shaped grid pieces in the arc extinguishing grid set are defined as common grid pieces (1), two grid piece legs are arranged at the arc inlet ends of the common grid pieces (1) and/or the special-shaped grid pieces (2), and a U-shaped or V-shaped opening is formed between the two grid piece legs.
Compared with the prior art, the utility model have following advantage:
because the utility model discloses it is heterotypic bars piece to have a slice bars piece at least in the arc extinguishing bars piece group, is equipped with the breach of indent on the distolateral border of the export of the basal portion of heterotypic bars piece. During the use, after the electric arc that opens and shuts gets into arc extinguishing bars group, the short arc that forms between the bars piece receives on the special-shaped bars piece to the lorentz force of breach direction for electric arc moves towards breach direction one end, makes electric arc stop inside the bars piece more easily, does not stay for a long time in the income arc end position of bars piece, is favorable to electric arc to be cut, improves the disjunction ability of circuit breaker.
Drawings
Fig. 1 is a schematic structural perspective view of embodiment 1 of the present invention;
fig. 2 is a schematic structural perspective view of embodiment 2 of the present invention;
fig. 3 is a schematic structural perspective view of embodiment 3 of the present invention.
In the above drawings: 1. a common grid plate; 2. a special-shaped grid sheet; 21. an inwardly recessed notch.
Detailed Description
The invention will be further described with reference to the following drawings and examples:
example 1: referring to fig. 1, an arc chute group:
an arc-extinguishing grid group is formed by arranging a plurality of grid plates at intervals, each grid plate comprises a base part which is approximately rectangular, the side of the base part, which is back to an arc in the advancing direction of the arc, is an outlet end, and the side, which is towards the arc in the advancing direction of the arc, of the base part is an arc inlet end.
At least one grid sheet in the arc extinguishing grid sheet group is a special-shaped grid sheet 2, and the special-shaped grid sheet 2 is a grid sheet provided with an inwards concave notch 21 on the edge of the outlet end side of the base part. In fig. 1, the 5 th grid plate from top to bottom is a special-shaped grid plate 2, and the rest grid plates are ordinary grid plates 1.
The concave notch 21 is U-shaped or V-shaped. Or other shapes are possible.
The arc inlet end of the common grid sheet and/or the special-shaped grid sheet 1 can be also provided with two grid sheet legs, and a U-shaped or V-shaped opening is formed between the two grid sheet legs. In fact, the side of the grid 1 facing the arc in the direction of travel of the arc (i.e. the arc entry end) may or may not be provided with openings, whether it is a profiled grid 2 or a plain grid. The method comprises the following steps: namely, the common grid plate 1 and the special-shaped grid plate 2 are not provided with openings on the sides facing the electric arc. Or at least one common grid sheet 1 is provided with an opening on one side facing the electric arc, the special-shaped grid sheet 2 is not provided with an opening, the arc inlet end of the common grid sheet 1 provided with the opening is provided with two grid sheet legs, and a U-shaped or V-shaped opening is formed between the two grid sheet legs. Or at least one special-shaped grid sheet 2 is provided with an opening towards one side of the electric arc, the common grid sheet 1 is not provided with an opening, the arc inlet end of the special-shaped grid sheet 2 provided with the notch is provided with two grid sheet legs, and a U-shaped or V-shaped opening is formed between the two grid sheet legs. Or at least one common grid sheet 1 and at least one special-shaped grid sheet 2 are provided with notches on one side facing the electric arc, the arc inlet ends of the common grid sheet 1 with the notches and the special-shaped grid sheet 2 with the notches are respectively provided with two grid sheet legs, and a U-shaped or V-shaped opening is formed between the two grid sheet legs.
During the use, after the electric arc that opens and shuts gets into arc extinguishing bars group, the short arc that forms between the bars piece receives the lorentz force to the breach 21 direction of indent on the heterotypic bars piece 2 for electric arc removes towards breach 21 direction one end, makes electric arc stop inside the bars piece more easily, does not stop for a long time in the income arc end position of bars piece, is favorable to electric arc to be cut, improves the breaking capacity of circuit breaker.
Example 2: referring to fig. 2, an arc chute group is shown:
an arc-extinguishing grid assembly is formed by arranging a plurality of grid plates at intervals, each grid plate comprises a base part which is approximately rectangular, the base part is an outlet end at the side back to an arc in the advancing direction of the arc, and the base part is an arc inlet end at the side facing the arc in the advancing direction of the arc, and the difference between the arc-extinguishing grid assembly and the arc-extinguishing grid assembly in the embodiment 1 is that: the special-shaped grid plates 2 and the common grid plates 1 in the arc extinguishing grid plate group are alternately arranged at intervals.
The rest is the same as embodiment 1, and the description is omitted here.
Example 3: referring to fig. 3, an arc chute group:
an arc-extinguishing grid group is formed by arranging a plurality of grid plates at intervals, each grid plate comprises a base part which is approximately rectangular, the side of the base part, which is back to an arc in the advancing direction of the arc, is an outlet end, and the side, which is towards the arc in the advancing direction of the arc, is an arc inlet end. The difference from example 1 is that: the special-shaped grid plates 2 and the common grid plates 1 in the arc extinguishing grid plate group are alternately arranged at intervals, namely, the two common grid plates 1 and the two special-shaped grid plates 2 are alternately arranged.
The rest is the same as embodiment 1, and the description is omitted here.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (6)
1. An arc extinguishing grid group is formed by arranging a plurality of grid pieces at intervals, each grid piece comprises a base part, and one side of the base part, which is back to an electric arc in the advancing direction of the electric arc, is an outlet end; the method is characterized in that: at least one grid sheet in the arc extinguishing grid sheet group is a special-shaped grid sheet (2), and the special-shaped grid sheet (2) refers to a grid sheet provided with an inwards concave notch (21) on the edge of the outlet end side of the base part.
2. The arc chute assembly of claim 1, wherein: the method comprises the following steps of defining grid plates except special-shaped grid plates in an arc extinguishing grid plate group as common grid plates (1), and alternately arranging the special-shaped grid plates (2) and the common grid plates (1) at intervals in the arc extinguishing grid plate group.
3. The arc chute set of claim 2, wherein: in the arc extinguishing grid set, the special-shaped grid plates (2) and the common grid plates (1) are arranged at intervals.
4. The arc chute set of claim 2, wherein: in the arc extinguishing grid set, the special-shaped grid plates (2) and the common grid plates (1) are arranged at intervals.
5. The arc chute group of claim 1, wherein: the concave notch (21) is U-shaped or V-shaped.
6. The arc chute assembly of claim 1, wherein: one side of the base part of the grid piece, which faces the electric arc in the advancing direction of the electric arc, is an arc inlet end; the arc extinguishing grid set is characterized in that the grid pieces except the special-shaped grid pieces in the arc extinguishing grid set are defined as common grid pieces (1), two grid piece legs are arranged at the arc inlet ends of the common grid pieces (1) and/or the special-shaped grid pieces (2), and a U-shaped or V-shaped opening is formed between the two grid piece legs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222364381.4U CN218585913U (en) | 2022-09-06 | 2022-09-06 | Arc extinguishing grid piece group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222364381.4U CN218585913U (en) | 2022-09-06 | 2022-09-06 | Arc extinguishing grid piece group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218585913U true CN218585913U (en) | 2023-03-07 |
Family
ID=85362473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222364381.4U Active CN218585913U (en) | 2022-09-06 | 2022-09-06 | Arc extinguishing grid piece group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218585913U (en) |
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2022
- 2022-09-06 CN CN202222364381.4U patent/CN218585913U/en active Active
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