CN217485398U - Arc extinguishing system of molded case circuit breaker - Google Patents
Arc extinguishing system of molded case circuit breaker Download PDFInfo
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- CN217485398U CN217485398U CN202221342084.3U CN202221342084U CN217485398U CN 217485398 U CN217485398 U CN 217485398U CN 202221342084 U CN202221342084 U CN 202221342084U CN 217485398 U CN217485398 U CN 217485398U
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- arc extinguishing
- arc
- contact
- circuit breaker
- static contact
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Abstract
The utility model relates to a moulded case circuit breaker's arc extinguishing system, including setting up the explosion chamber on the static contact, the explosion chamber include that two flash barriers, a plurality of arc extinguishments of setting between two flash barriers delete the piece, a plurality of arc extinguishments delete and be provided with the arc extinguishing recess on the piece respectively, a plurality of arc extinguishments delete be formed with between the arc extinguishing recess with the movement track assorted arc extinguishing passageway of moving contact, the arc extinguishing passageway in set up the flexible arc extinguishing baffle that separates the shelves between moving contact and static contact. The utility model has the advantages of simple structure, dependable and stable performance, arc extinguishing are effectual, can effectively improve the circuit breaker breaking capacity.
Description
Technical Field
The utility model relates to a circuit breaker technical field, concretely relates to moulded case circuit breaker's arc extinguishing system.
Background
The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition for a predetermined time. The circuit breaker has overload, short circuit and under-voltage protection functions, can protect lines and power supply equipment from being damaged, and can protect fire hazards possibly caused by long-term grounding faults which cannot be detected by overcurrent protection. The molded case circuit breaker comprises a shell, an operating mechanism, a moving contact, a static contact and an arc extinguishing system, the arc extinguishing system of the existing molded case circuit breaker is unreasonable in structural design, when the circuit breaker is broken, electric arcs are easy to extend onto the moving contact, the arcing distance is large, the arcing time is long, the arc extinguishing effect is unsatisfactory, the service life of the contact is short, and the breaking capacity of the limit and the operation of the circuit breaker are weak.
Disclosure of Invention
An object of the utility model is to overcome prior art's defect, provide a simple structure, stable performance are reliable, the arc extinguishing is effectual, can effectively improve the arc extinguishing system of circuit breaker breaking capacity.
For realizing the above-mentioned purpose, the utility model discloses a moulded case circuit breaker's arc extinguishing system, including setting up the explosion chamber on the static contact, the explosion chamber include two flash barriers, set up a plurality of arc extinguishments between two flash barriers and delete the piece, a plurality of arc extinguishments delete and be provided with the arc extinguishing recess on the piece respectively, a plurality of arc extinguishments delete be formed with between the arc extinguishing recess with the movement track assorted arc extinguishing passageway of moving contact, the arc extinguishing passageway in set up the flexible arc extinguishing baffle of separating the shelves between moving contact and static contact.
The beneficial effect of above-mentioned structure is: be provided with flexible arc extinguishing baffle on the explosion chamber, flexible arc extinguishing baffle adopts high temperature resistant insulating flexible material to make, and flexible arc extinguishing baffle can shorten the arcing time, cuts off the arcing distance, and the arc extinguishing effect is better, can effectively improve the disconnected ability of breaking of circuit breaker limit and operation breaking. When the breaker is switched on, the moving contact firstly pulls the flexible arc extinguishing baffle to generate bending deformation and then is closed with the fixed contact; in the process of opening the circuit breaker, the moving contact is disconnected with the fixed contact firstly, the moving contact then shifts the flexible arc-extinguishing baffle to generate bending deformation, and the flexible arc-extinguishing baffle can be separated between the moving contact and the fixed contact, so that the purposes of shortening the arcing time and the arcing distance can be realized. Therefore, the arc extinguishing system of the molded case circuit breaker has the advantages of simple structure, stable and reliable performance, good arc extinguishing effect and capability of effectively improving the breaking capacity of the circuit breaker.
Particularly, one end of each arc-extinguishing baffle is riveted on one arc-extinguishing grid piece, the other end of each arc-extinguishing baffle is provided with a spacer extending in the arc-extinguishing channel, the spacer can flexibly deform along with the action of the movable contact, and the spacer is separated between the movable contact and the static contact when the movable contact is disconnected from the static contact. The barrier of the arc-extinguishing baffle can be separated between the moving contact and the static contact, the arc-extinguishing time can be shortened by the barrier, the arc-extinguishing distance is cut off, and the arc-extinguishing effect is better.
In particular, the shape of the barrier plate is matched with that of the arc extinguishing groove, and the barrier plate can move along with the movable contact and can freely swing in the arc extinguishing channel. The blocking piece can swing freely in the arc extinguishing channel, so that the blocking and the blocking of the blocking piece and the arc extinguishing deleting piece can be avoided, and when the moving contact is disconnected with the static contact, the blocking piece can reliably block between the moving contact and the static contact, thereby being beneficial to the reliability of the work of an arc extinguishing system.
Particularly, one end of the static contact is provided with a wiring part, the other end of the static contact is provided with a U-shaped contact part, the tail part of the contact part extends into the arc extinguishing channel, and a static contact matched with the movable contact is arranged on the tail part of the contact part. The static contact adopts the design of U type structure, is favorable to electric arc to enter into the arc extinguish chamber fast, is favorable to extinguishing fast of electric arc, is favorable to prolonging electric life.
Particularly, the magnetic increasing sheets are arranged at the positions, corresponding to the lower part of the static contact, in the contact part. Increase the magnetic sheet and can play the magnetic blow effect, can lengthen electric arc, can blow into the arc extinguish chamber with electric arc fast in, electric arc is cooled off, can accelerate electric arc to extinguish, is favorable to improving this arc extinguishing system's arc extinguishing effect.
Drawings
Fig. 1 is the internal structure diagram of the circuit breaker according to the embodiment of the present invention.
Fig. 2 is a cross-sectional view of the arc extinguish chamber of the embodiment of the invention.
Fig. 3 is an assembly view of the arc extinguishing door and the flexible arc extinguishing baffle according to the embodiment of the present invention.
Fig. 4 is a cross-sectional view of fig. 3.
Detailed Description
As shown in fig. 1-4, the embodiment of the utility model provides a moulded case circuit breaker's arc extinguishing system, including setting up the explosion chamber 20 on static contact 10, explosion chamber 20 include two flash barriers 21, set up a plurality of arc extinction between two flash barriers 21 and delete piece 22, a plurality of arc extinction delete on the piece 22 and be provided with arc extinguishing groove 221 respectively, a plurality of arc extinction delete be formed with between the arc extinguishing groove 221 of piece 22 with moving contact 11 movement track assorted arc extinguishing channel 220, arc extinguishing channel 220 in set up the flexible arc extinguishing baffle 12 that separates the shelves between moving contact 11 and static contact 10. One end of the arc extinguishing baffle 12 is riveted on one of the arc extinguishing grid pieces 22, the other end of the arc extinguishing baffle 12 is provided with a barrier piece 121 extending in the arc extinguishing channel 220, the barrier piece 121 can flexibly deform along with the action of the moving contact 11, and when the moving contact 11 is disconnected from the static contact 10, the barrier piece 121 is separated between the moving contact 11 and the static contact 10. The isolating piece of the arc-extinguishing baffle can be separated between the moving contact and the static contact, the isolating piece can shorten the arcing time, isolate the arcing distance and has better arc-extinguishing effect. The shape of the barrier rib 121 matches the shape of the arc extinguishing groove 221, and the barrier rib 121 can move along with the movable contact 11 and can freely swing in the arc extinguishing channel 220. The blocking piece can swing freely in the arc extinguishing channel, so that the blocking and the locking of the blocking piece and the arc extinguishing deletion piece can be avoided, and when the moving contact is disconnected with the static contact, the blocking piece can reliably block between the moving contact and the static contact, thereby being beneficial to the working reliability of the arc extinguishing system.
As shown in fig. 1, one end of the fixed contact 10 has a wiring portion 101, the other end of the fixed contact 10 has a U-shaped contact portion 102, a tail portion of the contact portion 102 extends into the arc extinguishing channel 220, and a fixed contact 103 matched with the movable contact 11 is disposed on the tail portion of the contact portion 102. The static contact adopts the design of U type structure, is favorable to electric arc to enter into the arc extinguish chamber fast, is favorable to extinguishing fast of electric arc, is favorable to prolonging electric life. And a magnetism increasing sheet 13 is arranged in the contact part 102 below the static contact 103. Increase the magnetic sheet and can play the magnetic blow effect, can lengthen electric arc, can blow into the arc extinguishing chamber with electric arc fast in, electric arc is cooled off, can accelerate electric arc to extinguish, is favorable to improving this arc extinguishing system's arc extinguishing effect.
Be provided with flexible arc extinguishing baffle on the explosion chamber, flexible arc extinguishing baffle adopts high temperature resistant insulating flexible material to make, and flexible arc extinguishing baffle can shorten the arcing time, cuts off the arcing distance, and the arc extinguishing effect is better, can effectively improve the disconnected ability of breaking of circuit breaker limit and operation breaking. When the breaker is switched on, the moving contact firstly pulls the flexible arc extinguishing baffle to generate bending deformation and then is closed with the fixed contact; in the process of opening the circuit breaker, the moving contact is disconnected with the fixed contact firstly, the moving contact then shifts the flexible arc-extinguishing baffle to generate bending deformation, and the flexible arc-extinguishing baffle can be separated between the moving contact and the fixed contact, so that the purposes of shortening the arcing time and the arcing distance can be realized. Therefore, the arc extinguishing system of the molded case circuit breaker has the advantages of simple structure, stable and reliable performance, good arc extinguishing effect and capability of effectively improving the breaking capacity of the circuit breaker.
Claims (5)
1. The utility model provides a moulded case circuit breaker's arc extinguishing system, is including setting up the explosion chamber on the static contact, its characterized in that: the arc extinguishing chamber comprises two arc isolating plates and a plurality of arc extinguishing deleting pieces arranged between the two arc isolating plates, arc extinguishing grooves are respectively formed in the arc extinguishing deleting pieces, arc extinguishing channels matched with the motion tracks of the moving contact are formed between the arc extinguishing grooves of the arc extinguishing deleting pieces, and flexible arc extinguishing baffles for isolating the moving contact and the static contact are arranged in the arc extinguishing channels.
2. The arc extinguishing system of the molded case circuit breaker according to claim 1, wherein: one end of the arc extinguishing baffle is riveted on one of the arc extinguishing grid pieces, the other end of the arc extinguishing baffle is provided with a baffle piece extending in the arc extinguishing channel, the baffle piece can flexibly deform along with the action of the moving contact, and when the moving contact is disconnected with the static contact, the baffle piece is separated between the moving contact and the static contact.
3. The arc extinguishing system of the molded case circuit breaker according to claim 2, wherein: the shape of the baffle plate is matched with that of the arc extinguishing groove, and the baffle plate can move along with the contact and can freely swing in the arc extinguishing channel.
4. The arc extinguishing system of the molded case circuit breaker according to claim 1 or 2, wherein: one end of the static contact is provided with a wiring part, the other end of the static contact is provided with a U-shaped contact part, the tail part of the contact part extends into the arc extinguishing channel, and a static contact matched with the moving contact is arranged on the tail part of the contact part.
5. The arc extinguishing system of the molded case circuit breaker according to claim 4, wherein: and a magnetic sheet is arranged in the contact part and below the corresponding static contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221342084.3U CN217485398U (en) | 2022-05-30 | 2022-05-30 | Arc extinguishing system of molded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221342084.3U CN217485398U (en) | 2022-05-30 | 2022-05-30 | Arc extinguishing system of molded case circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217485398U true CN217485398U (en) | 2022-09-23 |
Family
ID=83314134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221342084.3U Active CN217485398U (en) | 2022-05-30 | 2022-05-30 | Arc extinguishing system of molded case circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217485398U (en) |
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2022
- 2022-05-30 CN CN202221342084.3U patent/CN217485398U/en active Active
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