CN220856485U - Circuit breaker with improved structure - Google Patents
Circuit breaker with improved structure Download PDFInfo
- Publication number
- CN220856485U CN220856485U CN202322368615.7U CN202322368615U CN220856485U CN 220856485 U CN220856485 U CN 220856485U CN 202322368615 U CN202322368615 U CN 202322368615U CN 220856485 U CN220856485 U CN 220856485U
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- grid
- arc
- circuit breaker
- arc extinguishing
- extension part
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- 230000001154 acute effect Effects 0.000 claims abstract description 4
- 238000004880 explosion Methods 0.000 claims abstract 4
- 238000005452 bending Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 3
- 230000005684 electric field Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000010891 electric arc Methods 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 description 10
- 238000005253 cladding Methods 0.000 description 9
- 230000013011 mating Effects 0.000 description 7
- 238000010494 dissociation reaction Methods 0.000 description 4
- 230000005593 dissociations Effects 0.000 description 4
- 238000003491 array Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
A circuit breaker with improved structure belongs to the technical field of low-voltage electrical appliances. The circuit breaker includes the explosion chamber, and the explosion chamber includes a pair of lateral wall, the bars piece group of array, moves arc striking piece and quiet arc striking piece, and bars piece group is located a pair of between the lateral wall, moves arc striking piece and quiet arc striking piece and be located the both ends of bars piece group array direction respectively, and characteristics are: the movable arc striking piece comprises a base part, a first extension part, a second extension part and a matching part which are sequentially connected, wherein the base part is positioned at one end of the array direction of the grid piece group, the first extension part is bent towards the inside of the arc extinguishing chamber at an obtuse angle with the base part, the second extension part is bent towards the inside of the arc extinguishing chamber at an obtuse angle with the first extension part, and the matching part is bent towards the outside of the arc extinguishing chamber at an acute angle with the second extension part. The advantages are that: the movable arc striking sheet adopts a three-section gradually-folded structure, so that the accommodating space of the grid sheet in the arc extinguishing chamber is enlarged, the arc extinguishing capability of the arc extinguishing chamber is improved, the electric field distribution in the arc extinguishing chamber is optimized, the entering process of an electric arc in the arc extinguishing chamber is optimized, and the arc extinguishing performance of the arc extinguishing chamber is improved.
Description
Technical Field
The utility model belongs to the technical field of piezoelectric devices, and particularly relates to a circuit breaker with an improved structure.
Background
Air circuit breakers serve as important power distribution systems which are connected to a power supply network for protecting the loads downstream thereof from fault currents. However, with the development of new energy, the use occasions of the direct current circuit breaker are more and more, and the voltage requirement is also continuously improved. New requirements are put forward for existing air circuit breakers.
The contact arc extinguishing system of the direct current breaker generally adopts a mode that one contact mechanism is matched with a plurality of contact blades, and meanwhile, arc extinguishing is carried out by matching with a plurality of layers of stacked arc extinguishing grid blades. With the development of new energy technology, the rated working voltage of the direct current circuit breaker is higher and higher, and for an arc extinguishing chamber, a larger space is needed for an arc extinguishing grid plate to meet the arc extinguishing requirement. To this end, the inventors have advantageously devised that the technical solutions described below are created in this context.
Disclosure of utility model
The utility model aims to provide a circuit breaker with an improved structure, wherein a movable striking plate is in a three-section gradually furling structure at one side of an arc extinguishing grid plate group, so that the accommodating space of grid plates in an arc extinguishing chamber is enlarged, and the arc extinguishing capability of the arc extinguishing chamber is improved.
The utility model aims to achieve the purpose, and the circuit breaker with the improved structure comprises an arc extinguishing chamber, wherein the arc extinguishing chamber comprises a pair of side walls, an array grid sheet group, a movable arc striking sheet and a static arc striking sheet, the grid sheet group is positioned between the pair of side walls, the movable arc striking sheet and the static arc striking sheet are respectively positioned at two ends of the grid sheet group in the array direction, the movable arc striking sheet comprises a base part, a first extension part, a second extension part and a matching part which are sequentially connected, the base part is positioned at one end of the grid sheet group in the array direction, the first extension part and the base part form an obtuse angle to be close to the inside of the arc extinguishing chamber, the second extension part and the first extension part form an obtuse angle to be close to the inside of the arc extinguishing chamber, and the matching part and the second extension part form an acute angle to be folded to the outside of the arc extinguishing chamber.
In a specific embodiment of the utility model, the circuit breaker further comprises a contact system, wherein the contact system comprises a moving contact and a fixed contact, the moving contact is contacted with or separated from the fixed contact after being operated, the moving arc striking piece is positioned at one end close to the moving contact, and the fixed arc striking piece is positioned at one end close to the fixed contact.
In another specific embodiment of the present utility model, the base and the grid plates of the grid plate set are arranged in parallel.
In yet another specific embodiment of the present utility model, the base portion has a rectangular block shape, and the first extension portion, the second extension portion, and the mating portion are each in a strip shape.
In yet another specific embodiment of the present utility model, the mating portion is located at an upper edge of the moving contact head path.
In a further specific embodiment of the present utility model, the movable arc striking plate is formed by bending a metal plate.
In a further specific embodiment of the utility model, the set of gate sheets comprises at least a first gate sheet and a second gate sheet, the first gate sheet being shorter than the second gate sheet.
In a further specific embodiment of the present utility model, the second grid is a plurality of second grid arrays, the second grid arrays are arranged together and are located in the middle of the grid group, and two groups of the first grids are respectively arranged at two ends of the second grid arrays.
The utility model has the beneficial effects that due to the adoption of the structure, the utility model has the following advantages: the movable arc striking plate is arranged on one side of the arc extinguishing grid plate of the array and corresponds to the upper part of the movable contact, and is of a three-section gradually furling structure on one side of the arc extinguishing grid plate, so that the accommodating space of the grid plate in the arc extinguishing chamber is enlarged, the arc extinguishing capability of the arc extinguishing chamber is improved, meanwhile, the electric field distribution in the arc extinguishing chamber is optimized, the entering process of an electric arc in the arc extinguishing chamber is optimized, and the arc extinguishing performance of the arc extinguishing chamber is improved.
Drawings
Fig. 1 is a schematic perspective view of a contact arc extinguishing system according to the present utility model;
Fig. 2 is a schematic perspective view of an arc extinguishing chamber according to the present utility model;
fig. 3 is an exploded view of the arc chute of the present utility model;
Fig. 4 is a schematic structural view of an arc extinguishing gate sheet according to the present utility model;
Fig. 5 is a side cross-sectional view of the contact quenching system of the present utility model;
fig. 6 is a schematic structural view of the movable arc striking plate according to the present utility model.
In the figure: 1. arc extinguishing chamber, 11, side wall, 12, grid sheet group, 121, first grid sheet, 122, second grid sheet, 13, cladding piece, 14, movable arc striking sheet, 141, base, 142, first extension, 143, second extension, 144, mating part, 15, static arc striking sheet, 16, free piece, 17, top cover; 2. the contact system, 21, moving contact, 22, static contact.
Detailed Description
The following detailed description of specific embodiments of the utility model, while given in connection with the accompanying drawings, is not intended to limit the scope of the utility model, and any changes that may be made in the form of the inventive concepts described herein, without departing from the spirit and scope of the utility model.
In the following description, any reference to the directions or azimuths of up, down, left, right, front and rear is based on the positions shown in the corresponding drawings, and therefore, should not be construed as a limitation on the technical solutions provided by the present utility model.
Fig. 1 is a schematic structural diagram of a contact arc extinguishing system. The circuit breaker comprises an arc chute 1 and a contact system 2, said arc chute 1 being located in the opening direction of said contact system 2.
Specifically, the contact system 2 includes a moving contact 21 and a fixed contact 22, and the moving contact 21 contacts or separates from the fixed contact 22 after acting, so that the contact system 2 is closed or opened. For the circuit breaker, when the circuit breaker is in a closing state, the moving contact 21 and the fixed contact 22 are in a contact state; when the breaker is in the opening state, the moving contact 21 and the fixed contact 22 are in the separation state.
Fig. 2 and 3 are schematic views of the structure of the arc extinguishing chamber 1. The arc extinguishing chamber 1 comprises a pair of side walls 11, an array grid sheet set 12, a cladding piece 13, a dynamic striking sheet 14, a static striking sheet 15, a dissociation piece 16 and a top cover 17. The pair of side walls 11 are located on the left and right sides of the arc extinguishing chamber 1, the grid group 12 comprises a plurality of grids, the grids are arranged at intervals, and the grid group 12 is located between the pair of side walls 11. The cladding members 13 are also in a pair, and each cooperate with a corresponding one of the side walls 11, i.e. one cladding member 13 cooperates with each side wall 11. The cladding member 13 cooperates with the corresponding side wall 11 to cladding the leg of the grid. Since the side wall 11 and the cladding member 13 are both a pair, a pair of grid legs of the grid are clad. After the mounting of the cladding members 13 is completed, a narrow slit is formed between the pair of cladding members 13. The narrow slits can improve the arc extinguishing capability of the arc extinguishing chamber 1.
The movable arc striking plate 14 and the static arc striking plate 15 are respectively positioned at two ends of the grid plate group 12 in the array direction. Wherein, the movable arc striking plate 14 is positioned near one end of the movable contact 21, and the static arc striking plate 15 is positioned near one end of the static contact 22. The movable arc striking plate 14 and the static arc striking plate 15 extend downward and are close together, so that the movable arc striking plate 14 and the static arc striking plate 15 isolate the inner space of the arc extinguishing chamber 1 in the front-rear direction. That is, in the front-rear direction of the arc extinguishing chamber 1, the space between the movable striking plate 14 and the stationary striking plate 15 is an inner space of the arc extinguishing chamber 1 for extinguishing an arc generated when the movable contact 21 and the stationary contact 22 are separated.
The arc-extinguishing chamber 1 further comprises a dissociation piece 16 and a top cover 17, wherein the dissociation piece 16 is positioned above the grid set 12, the dissociation piece 16 is used for filtering and exhausting the gas of the arc-extinguishing chamber 1, the top cover 17 is used as a top support piece of the arc-extinguishing chamber 1, and the top cover 17 and the pair of side walls 11 form an outer shell of the arc-extinguishing chamber 1.
Fig. 4 is a schematic structural diagram of the grid set 12. The gate group 12 includes at least a first gate 121 and a second gate 122, and of course, the gate type of the gate group 12 is not limited, and may include a third gate, for example. In the present embodiment, only the first gate 121 and the second gate 122 are provided.
Wherein the first gate 121 is shorter than the second gate 122. In terms of arrangement, the number of second grid plates 122 is plural, the plural second grid plates 122 are arranged together in an array manner and are positioned in the middle of the grid plate group 12, and two groups of first grid plates 121 are respectively arranged at two ends of the second grid plates 122 arranged in an array manner. That is, the first grid pieces 121 are arranged in two groups and are positioned at both ends of the second grid pieces 122 in the whole row direction. So that the entire grating group 12 forms a "mountain" shape, i.e. the second grating 122 protrudes downwards.
In the case of a single gate, the gate includes a gate base and a pair of gate legs extending downwardly from opposite sides of the gate base.
As shown in fig. 5 and 6, the technical innovation of the present utility model is that: the movable striking plate 14 includes a base 141, a first extension 142, a second extension 143, and a mating portion 144. The movable arc striking plate 14 is formed by bending a metal plate, and the base 141 and the grid plates of the grid plate group 12 are arranged in parallel. The base 141 is preferably rectangular and block-shaped, but may be strip-shaped or the like. If the base 141 has a rectangular block shape, it is advantageous to fix the base to the pair of side walls 11.
One end of the first extension portion 142 is connected to the base portion 141, the other end is connected to one end of the second extension portion 143, and the other end of the second extension portion 143 is connected to the mating portion 144. Namely, the base 141, the first extension 142, the second extension 143, and the mating part 144 are sequentially connected. The first and second extension portions 142, 143 are gradually drawn toward the inside of the arc extinguishing chamber 1 from the base portion 141, and the engaging portion 144 is folded toward the outside of the arc extinguishing chamber 1. Specifically, a first bend that approaches the inside of the arc extinguishing chamber 1 is formed between the first extension portion 142 and the base portion 141, and the first bend forms an obtuse angle; a second bending part which is close to the inside of the arc extinguishing chamber 1 is formed between the second extending part 143 and the first extending part 142, and the second bending part forms an obtuse angle.
The engaging portion 144 is configured to engage with the head of the moving contact 21, and preferably, the engaging portion 144 is located at an upper edge of the head path of the moving contact 21. A third bending extending to the outside of the arc extinguishing chamber 1 is formed between the matching portion 144 and the second extending portion 143, and the third bending is acute.
In this embodiment, the first extension portion 142, the second extension portion 143, and the mating portion 144 are all in a strip shape.
Because the base 141, the first extension portion 142 and the second extension portion 143 adopt a three-section gradually folded structure, compared with the traditional two-section structural form, the space inside the arc-extinguishing chamber 1 is increased, the grid sheet has a larger accommodating space, the requirement of the development of the circuit breaker is met, and the arc-extinguishing chamber 1 can have better arc-extinguishing performance. More specifically, the grid base of the grid has a larger accommodation space. Meanwhile, the electric field distribution inside the arc-extinguishing chamber 1 is optimized, the entering process of the arc in the arc-extinguishing chamber 1 is optimized, and the arc-extinguishing performance of the arc-extinguishing chamber 1 is improved.
Claims (8)
1. The utility model provides a circuit breaker of institutional advancement, the circuit breaker includes explosion chamber (1), explosion chamber (1) include a pair of lateral wall (11), bars piece group (12) of array, move striking piece (14) and quiet striking piece (15), bars piece group (12) are located a pair of between lateral wall (11), move striking piece (14) and quiet striking piece (15) are located respectively the both ends of bars piece group (12) array direction, its characterized in that: the movable arc striking piece (14) comprises a base (141), a first extension part (142), a second extension part (143) and a matching part (144) which are sequentially connected, wherein the base (141) is positioned at one end of the array direction of the grid piece group (12), the first extension part (142) is bent towards the inside of the arc extinguishing chamber at an obtuse angle with the base (141), the second extension part (143) is bent towards the inside of the arc extinguishing chamber at an obtuse angle with the first extension part (142), and the matching part (144) is bent towards the outside of the arc extinguishing chamber (1) at an acute angle with the second extension part (143).
2. The circuit breaker of claim 1, wherein: the circuit breaker further comprises a contact system (2), the contact system (2) comprises a moving contact (21) and a fixed contact (22), the moving contact (21) is contacted with or separated from the fixed contact (22) after moving, the moving arc striking piece (14) is positioned at one end close to the moving contact (21), and the fixed arc striking piece (15) is positioned at one end close to the fixed contact (22).
3. The circuit breaker of claim 1, wherein: the base (141) and the grid sheets of the grid sheet group (12) are arranged in parallel.
4. The circuit breaker of claim 1, wherein: the base (141) is rectangular and blocky, and the first extension part (142), the second extension part (143) and the matching part (144) are all strip-shaped.
5. The circuit breaker of claim 2, wherein: the matching part (144) is positioned at the upper edge of the head path of the moving contact (21).
6. The circuit breaker of claim 1, wherein: the movable arc striking piece (14) is formed by bending a metal plate.
7. The circuit breaker of claim 1, wherein: the grid set (12) comprises at least a first grid (121) and a second grid (122), the first grid (121) being shorter than the second grid (122).
8. The circuit breaker of claim 7 wherein: the second grid plates (122) are multiple, the second grid plates (122) are arranged together in an array mode and are located in the middle of the grid plate group (12), and two groups of first grid plates (121) are respectively arranged at two ends of the second grid plates (122) arranged in an array mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322368615.7U CN220856485U (en) | 2023-09-01 | 2023-09-01 | Circuit breaker with improved structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322368615.7U CN220856485U (en) | 2023-09-01 | 2023-09-01 | Circuit breaker with improved structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220856485U true CN220856485U (en) | 2024-04-26 |
Family
ID=90739494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322368615.7U Active CN220856485U (en) | 2023-09-01 | 2023-09-01 | Circuit breaker with improved structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220856485U (en) |
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2023
- 2023-09-01 CN CN202322368615.7U patent/CN220856485U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |