CN220456339U - Arc extinguishing system of circuit breaker - Google Patents
Arc extinguishing system of circuit breaker Download PDFInfo
- Publication number
- CN220456339U CN220456339U CN202321960487.9U CN202321960487U CN220456339U CN 220456339 U CN220456339 U CN 220456339U CN 202321960487 U CN202321960487 U CN 202321960487U CN 220456339 U CN220456339 U CN 220456339U
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- arc
- extinguishing
- sheet group
- striking
- grid sheet
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- 230000003068 static effect Effects 0.000 claims 4
- 230000000694 effects Effects 0.000 abstract description 11
- 238000010891 electric arc Methods 0.000 description 15
- 238000004880 explosion Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model relates to an arc extinguishing system of a circuit breaker, which comprises a shell, a moving contact arranged in the shell and a fixed contact matched with the moving contact, wherein an arc extinguishing chamber assembly is arranged on the fixed contact and comprises two arc-isolating plates, a first arc-extinguishing grid sheet group arranged between the two arc-isolating plates corresponding to the fixed contact of the fixed contact, and a second arc-extinguishing grid sheet group arranged between the two arc-isolating plates corresponding to one side of the first arc-extinguishing grid sheet group, wherein the second arc-extinguishing grid sheet group is provided with an arc striking sheet group connected with the first arc-extinguishing grid sheet group. The utility model has the advantages of simple structure, stable and reliable performance, convenient assembly the arc extinguishing effect is strong, and the breaking capacity of the circuit breaker can be effectively improved.
Description
Technical Field
The utility model relates to the technical field of circuit breakers, in particular to an arc extinguishing system of a circuit breaker.
Background
At present, a molded case circuit breaker is a common protection electrical appliance, has the functions of switching on and off load current and overload and short-circuit protection on the load current, and is widely applied to overload and short-circuit protection of various power distribution systems and motors. The existing circuit breaker generally adopts an arc extinguishing chamber to extinguish the arc, and metal grid plates arranged in a stacking mode are adopted in the arc extinguishing chamber to cut the arc, so that the long arc is forced to be divided into a plurality of sections of short arcs, and the partial pressure and cooling of the arc are realized. The inside of current moulded case circuit breaker is provided with only one explosion chamber, leads to its arc extinguishing effect relatively poor, breaking capacity relatively poor, can't satisfy the operation requirement of supply voltage 1000V, 1500V.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide the arc extinguishing system which has the advantages of simple structure, stable and reliable performance, convenient assembly, strong arc extinguishing effect and capability of effectively improving the breaking capacity of a circuit breaker.
In order to achieve the above purpose, the utility model adopts an arc extinguishing system of a circuit breaker, which comprises a shell, a moving contact arranged in the shell and a fixed contact matched with the moving contact, wherein the fixed contact is provided with an arc extinguishing chamber component, the arc extinguishing chamber component comprises two arc-isolating plates, a first arc-extinguishing grid sheet group arranged between the two arc-isolating plates corresponding to the fixed contact of the fixed contact, and a second arc-extinguishing grid sheet group arranged between the two arc-isolating plates corresponding to one side of the first arc-extinguishing grid sheet group, and the second arc-extinguishing grid sheet group is provided with an arc-striking sheet group connected with the first arc-extinguishing grid sheet group.
The beneficial effects of the structure are as follows: be provided with first arc extinguishing bars piece group, second arc extinguishing bars piece group respectively between two arc baffles, with first arc extinguishing bars piece group, second arc extinguishing bars piece group integration is on two arc baffles, the modularization assembly of this explosion chamber subassembly of being convenient for, assembly efficiency is higher, and be connected with the striking piece group between first arc extinguishing bars piece group and the second arc extinguishing bars piece group, the striking piece group can be linked together first arc extinguishing bars piece group and the second arc extinguishing bars piece group, adopt two arc extinguishing bars piece group structural design, greatly increased the quantity of bars piece, the arc extinguishing effect is higher, the breaking capacity of this arc extinguishing system has been showing to have improved, can satisfy high voltage class's user demand. Therefore, the arc extinguishing system of the circuit breaker has the advantages of simple structure, stable and reliable performance, convenient assembly, strong arc extinguishing effect and capability of effectively improving the breaking capacity of the circuit breaker.
Particularly, an arc striking plate is arranged on the fixed contact, and one end of the arc striking plate penetrates through the first arc extinguishing cavity of the first arc extinguishing grid sheet group and extends below the arc striking sheet group. The arc striking plate can rapidly introduce the electric arc into the arc striking sheet group, the arc striking sheet group can rapidly enter the electric arc into the second arc extinguishing grid sheet group, and the aim of rapidly extinguishing the electric arc can be achieved.
Particularly, the first arc-extinguishing grid sheet group comprises a plurality of first arc-extinguishing grid sheets which are arranged between two arc-extinguishing plates at intervals, a first arc-extinguishing cavity is formed between the first arc-extinguishing grid sheets, the first arc-extinguishing cavity is matched with the moving contact movement track, and the stationary contact of the stationary contact extends in the first arc-extinguishing cavity. The fixed contact extends in the first arc-extinguishing cavity of the first arc-extinguishing grid sheet group, and an electric arc generated between the moving contact and the fixed contact can quickly enter the first arc-extinguishing cavity of the first arc-extinguishing grid sheet group, so that the arc-extinguishing performance of the arc-extinguishing system is facilitated.
Particularly, the second arc-extinguishing grid sheet group comprises a plurality of second arc-extinguishing grid sheets which are arranged between two arc-extinguishing plates in parallel at intervals, arc-extinguishing grooves are respectively formed in one side, facing the first arc-extinguishing grid sheet group, of the second arc-extinguishing grid sheets, and second arc-extinguishing cavities are formed between the arc-extinguishing grooves of the second arc-extinguishing grid sheets. The second arc-extinguishing grid sheet group is provided with a second arc-extinguishing cavity towards one side of the first arc-extinguishing grid sheet group, and an electric arc can rapidly enter the second arc-extinguishing grid sheet group through the first arc-extinguishing grid sheet group, so that the arc-extinguishing performance of the arc-extinguishing system can be improved.
Particularly, the arc striking sheet group comprises a plurality of arc striking sheets which are arranged between two arc baffles in parallel at intervals, an arc striking cavity is formed between the arc striking sheets towards one side of the first arc extinguishing grid sheet group, and the arc striking cavity is communicated with the second arc extinguishing cavity. The arc striking cavity of the arc striking sheet group can introduce the electric arc into the second arc extinguishing cavity, so that the electric arc can be extinguished rapidly, and the arc extinguishing effect of the arc extinguishing system can be improved.
Particularly, the shell is provided with an exhaust port corresponding to the second arc extinguishing grid sheet group, an air dispersing mesh sheet is arranged in the exhaust port, and an insulating sheet is arranged on one side of the air dispersing mesh sheet. The exhaust port is internally provided with a gas-dispersing mesh sheet and an insulating sheet which can extinguish residual electric arcs, avoiding the re-burning of the electric arc and being beneficial to improving the arc extinguishing effect of the arc extinguishing system.
Drawings
Fig. 1 is a sectional view of a circuit breaker according to an embodiment of the present utility model.
Fig. 2 is a perspective view of an embodiment of the present utility model.
Fig. 3 is an exploded view of an embodiment of the present utility model.
Detailed Description
As shown in fig. 1 to 3, an embodiment of the present utility model is an arc extinguishing system of a circuit breaker, including a housing 10, a moving contact 11 disposed in the housing 10, and a fixed contact 12 matched with the moving contact 11, wherein an arc extinguishing chamber assembly 20 is disposed on the fixed contact 12, the arc extinguishing chamber assembly 20 includes two arc-isolating plates 21, a first arc-extinguishing gate sheet set 22 disposed between the two arc-isolating plates 21 corresponding to a fixed contact 121 of the fixed contact 12, and a second arc-extinguishing gate sheet set 23 disposed between the two arc-isolating plates 21 corresponding to one side of the first arc-extinguishing gate sheet set 22, and the second arc-extinguishing gate sheet set 23 has an arc-striking sheet set 24 connected with the first arc-extinguishing gate sheet set 22. The fixed contact 12 is provided with an arc striking plate 13, and one end of the arc striking plate 13 passes through the first arc extinguishing chamber 220 of the first arc extinguishing grid sheet group 22 and extends below the arc striking sheet group 24. The arc striking plate can rapidly introduce the electric arc into the arc striking sheet group, the arc striking sheet group can rapidly enter the electric arc into the second arc extinguishing grid sheet group, and the aim of rapidly extinguishing the electric arc can be achieved. The first arc-extinguishing grid plate group 22 comprises a plurality of first arc-extinguishing grid plates 221 which are arranged between two arc-extinguishing plates 21 at intervals, a first arc-extinguishing cavity 220 is formed between the first arc-extinguishing grid plates 221, the first arc-extinguishing cavity 220 is matched with the moving track of the moving contact 11, and the stationary contact 121 of the stationary contact 12 extends in the first arc-extinguishing cavity 220. The fixed contact extends in the first arc-extinguishing cavity of the first arc-extinguishing grid sheet group, and an electric arc generated between the moving contact and the fixed contact can quickly enter the first arc-extinguishing cavity of the first arc-extinguishing grid sheet group, so that the arc-extinguishing performance of the arc-extinguishing system is facilitated. The second arc-extinguishing grid sheet group 23 comprises a plurality of second arc-extinguishing grid sheets 231 which are arranged between the two arc-extinguishing plates 21 in parallel at intervals, arc-extinguishing grooves 232 are respectively arranged on one side, facing the first arc-extinguishing grid sheet group 22, of the second arc-extinguishing grid sheets 231, and second arc-extinguishing cavities 230 are formed between the arc-extinguishing grooves 232 of the second arc-extinguishing grid sheets 231. The second arc-extinguishing grid sheet group is provided with a second arc-extinguishing cavity towards one side of the first arc-extinguishing grid sheet group, and an electric arc can rapidly enter the second arc-extinguishing grid sheet group through the first arc-extinguishing grid sheet group, so that the arc-extinguishing performance of the arc-extinguishing system can be improved. The arc striking plate set 24 includes a plurality of arc striking plates 241 arranged between two arc baffles 21 in parallel and spaced apart, an arc striking cavity 240 is formed between the arc striking plates 241 toward the first arc extinguishing grid set 22, and the arc striking cavity 240 is communicated with the second arc extinguishing cavity 230. The arc striking cavity of the arc striking sheet group can introduce the electric arc into the second arc extinguishing cavity, so that the electric arc can be extinguished rapidly, and the arc extinguishing effect of the arc extinguishing system can be improved.
As shown in fig. 1, an exhaust port 100 is provided on the housing 10 corresponding to the second arc extinguishing grid plate group 23, an air diffusing mesh plate 14 is provided in the exhaust port 100, and an insulating plate 15 is provided on one side of the air diffusing mesh plate 14. The air dispersing mesh sheet and the insulating sheet are arranged in the air outlet, so that residual electric arcs can be extinguished, re-burning of the electric arcs is avoided, and the arc extinguishing effect of the arc extinguishing system is improved.
Be provided with first arc extinguishing bars piece group, second arc extinguishing bars piece group respectively between two arc baffles, with first arc extinguishing bars piece group, second arc extinguishing bars piece group integration is on two arc baffles, the modularization assembly of this explosion chamber subassembly of being convenient for, assembly efficiency is higher, and be connected with the striking piece group between first arc extinguishing bars piece group and the second arc extinguishing bars piece group, the striking piece group can be linked together first arc extinguishing bars piece group and the second arc extinguishing bars piece group, adopt two arc extinguishing bars piece group structural design, greatly increased the quantity of bars piece, the arc extinguishing effect is higher, the breaking capacity of this arc extinguishing system has been showing to have improved, can satisfy high voltage class's user demand. Therefore, the arc extinguishing system of the circuit breaker has the advantages of simple structure, stable and reliable performance, convenient assembly, strong arc extinguishing effect and capability of effectively improving the breaking capacity of the circuit breaker.
Claims (6)
1. The utility model provides an arc extinguishing system of circuit breaker, includes casing, the moving contact of setting in the casing, with moving contact matched with stationary contact, its characterized in that: the static contact is provided with an arc-extinguishing chamber component, the arc-extinguishing chamber component comprises two arc-extinguishing plates, a first arc-extinguishing grid sheet group which is arranged between the two arc-extinguishing plates and corresponds to the static contact of the static contact, and a second arc-extinguishing grid sheet group which is arranged between the two arc-extinguishing plates and corresponds to one side of the first arc-extinguishing grid sheet group, the second arc extinguishing grid sheet group is provided with an arc striking sheet group connected with the first arc extinguishing grid sheet group.
2. The arc extinguishing system of a circuit breaker according to claim 1, characterized in that: the static contact on be provided with the striking board, striking board one end pass the first arc extinguishing chamber of first arc extinguishing bars piece group and extend in the below of striking piece group.
3. The arc extinguishing system of a circuit breaker according to claim 1 or 2, characterized in that: the first arc-extinguishing grid sheet group comprises a plurality of first arc-extinguishing grid sheets which are arranged between two arc-extinguishing plates at intervals, a first arc-extinguishing cavity is formed between the plurality of first arc-extinguishing grid sheets, the first arc-extinguishing cavity is matched with the moving contact movement track, and the fixed contact of the fixed contact extends in the first arc-extinguishing cavity.
4. The arc extinguishing system of a circuit breaker according to claim 1 or 2, characterized in that: the second arc-extinguishing grid sheet group comprises a plurality of second arc-extinguishing grid sheets which are arranged between two arc-extinguishing plates in parallel at intervals, arc-extinguishing grooves are respectively formed in one side, facing the first arc-extinguishing grid sheet group, of the second arc-extinguishing grid sheets, and a second arc-extinguishing cavity is formed between the arc-extinguishing grooves of the second arc-extinguishing grid sheets.
5. The arc extinguishing system of a circuit breaker of claim 4, wherein: the arc striking sheet group comprises a plurality of arc striking sheets which are arranged between two arc baffles in parallel at intervals, an arc striking cavity is formed between the arc striking sheets towards one side of the first arc extinguishing grid sheet group, and the arc striking cavity is communicated with the second arc extinguishing cavity.
6. The arc extinguishing system of a circuit breaker according to claim 1 or 2, characterized in that: the shell on correspond second arc extinguishing bars piece group department and be provided with the gas vent, the gas vent in be provided with the gas-dispersing mesh piece, gas-dispersing mesh piece one side on be provided with the insulating piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321960487.9U CN220456339U (en) | 2023-07-24 | 2023-07-24 | Arc extinguishing system of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321960487.9U CN220456339U (en) | 2023-07-24 | 2023-07-24 | Arc extinguishing system of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220456339U true CN220456339U (en) | 2024-02-06 |
Family
ID=89724480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321960487.9U Active CN220456339U (en) | 2023-07-24 | 2023-07-24 | Arc extinguishing system of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220456339U (en) |
-
2023
- 2023-07-24 CN CN202321960487.9U patent/CN220456339U/en active Active
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