CN214378279U - Zero-flashover molded case circuit breaker - Google Patents
Zero-flashover molded case circuit breaker Download PDFInfo
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- CN214378279U CN214378279U CN202120778286.1U CN202120778286U CN214378279U CN 214378279 U CN214378279 U CN 214378279U CN 202120778286 U CN202120778286 U CN 202120778286U CN 214378279 U CN214378279 U CN 214378279U
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Abstract
The utility model relates to a zero-flashover molded case circuit breaker, which comprises a base, a middle cover, a face cover, an operating mechanism, a contact system, an arc extinguishing cover, an incoming line connecting terminal and an outgoing line connecting terminal, zero-arcing arc-extinguishing devices are respectively arranged on the middle cover corresponding to the inlet wire connecting terminal and the outlet wire connecting terminal, the zero-arcing arc-extinguishing device comprises a zero-arcing arc-extinguishing chamber and a terminal cover, wherein the zero-arcing arc-extinguishing chamber is respectively arranged in a plurality of wiring terminal cavities of a middle cover, the terminal cover is arranged on the middle cover and covers the zero-arcing arc-extinguishing chamber, the zero-flashover arc-extinguishing chamber comprises an arc-isolating cover arranged in the wiring terminal cavity and an arc-extinguishing grid sheet arranged in the arc-isolating cover, the arc isolating cover is provided with a locking piece, one end of the locking piece penetrates through a through hole of the terminal cover and is provided with a lead sealing hole exposed outside the terminal cover, and the terminal cover is provided with a locking groove matched with the lead sealing hole. The utility model has the advantages of simple structure, stable and reliable performance, convenient assembly.
Description
Technical Field
The utility model relates to a circuit breaker technical field, concretely relates to zero flashover moulded case circuit breaker.
Background
The molded case circuit breaker is widely applied to the departments of industry and agriculture, traffic, mines, civil buildings, national defense and the like, plays a great role in the transmission and distribution of electric power and the protection of motors, and is a product with large use amount and wide use range in low-voltage electric appliances. A molded case circuit breaker is a switching device capable of closing, carrying, and opening a current under a normal circuit condition, and closing, carrying, and opening a current under an abnormal circuit condition (including a short-circuit condition) within a prescribed time. When the plastic shell type circuit breaker is used, particularly in the process of breaking tests, huge energy is released in an arc spraying mode, a lot of metal particles directly gush out along with the arc, break through a baffle at the inlet wire end of the circuit breaker and fly out of the circuit breaker, and therefore the common circuit breaker can regulate the flashover distance. Even so, the damage of the arcing particles is still very large, and two methods for preventing the arcing particles are provided, so that firstly, the breaking energy of the circuit breaker is fundamentally controlled, and the arcing phenomenon is reduced; and secondly, blocking the arcing particles by adopting a zero arcing shield. However, the existing zero-arcing molded case circuit breaker has an unreasonable structural design, so that the zero-arcing molded case circuit breaker has the defects of complex structure, unreliable performance and inconvenient assembly.
Disclosure of Invention
An object of the utility model is to overcome prior art's defect, provide a zero flashover moulded case circuit breaker of simple structure, dependable performance, assembly are convenient.
In order to realize the purpose, the utility model adopts a zero-flashover molded case circuit breaker, which comprises a base, a middle cover, a surface cover, an operating mechanism, a contact system, an arc extinguishing cover, an incoming line connecting terminal and an outgoing line connecting terminal, zero-arcing arc-extinguishing devices are respectively arranged on the middle cover corresponding to the inlet wire connecting terminal and the outlet wire connecting terminal, the zero-arcing arc-extinguishing device comprises a zero-arcing arc-extinguishing chamber and a terminal cover, wherein the zero-arcing arc-extinguishing chamber is respectively arranged in a plurality of wiring terminal cavities of a middle cover, the terminal cover is arranged on the middle cover and covers the zero-arcing arc-extinguishing chamber, the zero-flashover arc-extinguishing chamber comprises an arc-isolating cover arranged in the wiring terminal cavity and an arc-extinguishing grid sheet arranged in the arc-isolating cover, the arc isolating cover is provided with a locking piece, one end of the locking piece penetrates through a through hole of the terminal cover and is provided with a lead sealing hole exposed outside the terminal cover, and the terminal cover is provided with a locking groove matched with the lead sealing hole.
The beneficial effect of above-mentioned structure does: the middle cover is provided with a zero-arcing device, and a zero-arcing arc extinguish chamber of the zero-arcing device can block arcing particles and prevent electric arcs from flying out of the circuit breaker, so that the purpose of zero-arcing of the molded case circuit breaker is achieved. And the arc isolating cover of the zero-arcing arc extinguishing chamber is provided with the locking piece, so that the zero-arcing arc extinguishing chamber and the terminal cover can be conveniently assembled, and the lead sealing hole is arranged on the locking piece, so that the zero-arcing arc extinguishing chamber can be locked on the terminal cover, and the random disassembly of other people is avoided. Therefore, the molded case circuit breaker has the advantages of simple structure, stable and reliable performance, convenient assembly and zero arcing.
Particularly, separate and be provided with an elastic clip on the both sides of arc cover respectively, the binding post intracavity of well lid correspond a elastic clip punishment and do not be provided with the draw-in groove, the elastic clip block in the draw-in groove, and constitute the joint cooperation of separating arc cover and well lid. The arc isolation cover and the middle cover are connected in a clamping matching mode, so that the arc isolation cover and the middle cover are convenient to assemble, and the assembly is more convenient.
Particularly, the arc separation cover is provided with an accommodating cavity, the arc extinguishing bars are arranged in the accommodating cavity, the arc extinguishing bars are formed by bending plates for multiple times, a plurality of round holes are formed in the arc extinguishing bars, and the arc separation cover is provided with square through holes communicated with the round holes. The arc extinguishing bars adopt a multi-bending structure, so that the contact area between the electric arc and the arc extinguishing bars is increased, and the arc extinguishing effect of the molded case circuit breaker is enhanced.
Particularly, the terminal cover in correspond every two adjacent wiring terminal cavity between punishment do not be provided with an division board, well cover and be provided with the joint groove corresponding to division board department, one side block of division board in the joint inslot, and constitute the joint cooperation of terminal cover and well lid. The isolating plate on the terminal cover can play insulating and isolating roles, the safety performance of the molded case circuit breaker is favorably improved, and the terminal cover and the middle cover are connected in a clamping matching mode, so that the terminal cover and the middle cover are convenient to assemble.
Drawings
Fig. 1 is a perspective view of an embodiment of the present invention.
Fig. 2 is an exploded view of an embodiment of the present invention.
Fig. 3 is a cross-sectional view of an embodiment of the present invention.
Fig. 4 is a perspective view of the arc-isolating cover according to the embodiment of the present invention.
Fig. 5 is a perspective view of an arc chute according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1 to 5, an embodiment of the present invention is a zero arcing molded case circuit breaker, including a base 10, a middle cover 11, a face cover 12, an operating mechanism 13, a contact system 14, an arc extinguishing cover 15, an incoming line terminal 16, and an outgoing line terminal 17, wherein a zero arcing arc extinguishing device 20 is respectively disposed on the middle cover 11 corresponding to the incoming line terminal 16 and the outgoing line terminal 17, the zero arcing arc extinguishing device 20 includes zero arcing arc extinguishing chambers 21 respectively disposed in a plurality of terminal cavities 18 of the middle cover 11, and terminal covers 22 disposed on the middle cover 11 and covering the zero arcing arc extinguishing chambers 21, the zero arcing arc extinguishing chambers 21 include arc isolating covers 211 disposed in the terminal cavities 18 and arc extinguishing grid pieces 212 disposed in the arc isolating covers 211, the arc isolating covers 211 are provided with hole sealing locking pieces 213, one ends of the locking pieces 213 pass through holes 221 of the terminal covers 22 and are provided with lead 214 exposed outside the terminal covers 22, the terminal cover 22 is provided with a locking groove 222 matched with the lead sealing hole 214.
As shown in fig. 2, 4 and 5, two sides of the arc-isolating cover 211 are respectively provided with an elastic clip 2111, the terminal cavity 18 of the middle cover 11 is internally provided with a clamping groove 181 corresponding to each elastic clip 2111, the elastic clips 2111 are clamped in the clamping groove 181, and the arc-isolating cover 211 is in clamping fit with the middle cover 11. The arc isolation cover and the middle cover are connected in a clamping matching mode, so that the arc isolation cover and the middle cover are convenient to assemble, and the assembly is more convenient. The arc insulation cover 211 is provided with an accommodating cavity 215, the arc extinguishing grid plates 212 are arranged in the accommodating cavity 215, the arc extinguishing grid plates 212 are formed by bending plates for multiple times, a plurality of round holes 216 are formed in the arc extinguishing grid plates 212, and the arc insulation cover 211 is provided with square through holes 217 communicated with the round holes 216. The arc extinguishing bars adopt a multi-bending structure, so that the contact area between the electric arc and the arc extinguishing bars is increased, and the arc extinguishing effect of the molded case circuit breaker is enhanced.
As shown in fig. 2, a separation plate 223 is respectively disposed in the terminal cover 22 corresponding to the space between every two adjacent terminal cavities 18, a clamping groove 111 is disposed on the middle cover 11 corresponding to the separation plate 223, one side of the separation plate 223 is clamped in the clamping groove 111, and the terminal cover 22 and the middle cover 11 are clamped and matched. The isolating plate on the terminal cover can play insulating and isolating roles, the safety performance of the molded case circuit breaker is favorably improved, and the terminal cover and the middle cover are connected in a clamping matching mode, so that the terminal cover and the middle cover are convenient to assemble.
The middle cover is provided with a zero-arcing device, and a zero-arcing arc extinguish chamber of the zero-arcing device can block arcing particles and prevent electric arcs from flying out of the circuit breaker, so that the purpose of zero-arcing of the molded case circuit breaker is achieved. And the arc isolating cover of the zero-arcing arc extinguishing chamber is provided with the locking piece, so that the zero-arcing arc extinguishing chamber and the terminal cover can be conveniently assembled, and the lead sealing hole is arranged on the locking piece, so that the zero-arcing arc extinguishing chamber can be locked on the terminal cover, and the random disassembly of other people is avoided. Therefore, the molded case circuit breaker has the advantages of simple structure, stable and reliable performance, convenient assembly and zero arcing.
Claims (4)
1. The utility model provides a zero arcing moulded case circuit breaker, includes base, well lid, face lid, operating device, contact system, arc-extinguish chamber, inlet wire binding post, the binding post that is qualified for the next round of competitions, its characterized in that: the well cover and correspond inlet wire binding post, the binding post punishment of being qualified for the next round of competitions do not is provided with zero arcing arc control device, zero arcing arc control device cover and shroud the terminal cover on zero arcing arc extinguishing chamber including setting up the zero arcing arc extinguishing chamber in a plurality of binding post intracavity of well lid, setting in, zero arcing arc extinguishing chamber including setting up at the binding post intracavity at the arc shield, set up the arc chute piece in the arc shield, the arc shield on be provided with the locking plate, the one end of locking plate pass the through-hole of terminal cover and be provided with the lead sealing hole that exposes outside the terminal cover, the terminal cover on be provided with the locking groove with lead sealing hole matched with.
2. The zero arcing molded case circuit breaker according to claim 1, wherein: the both sides of separating the arc cover on be provided with an elastic clip respectively, the binding post intracavity of well lid correspond an elastic clip punishment and do not be provided with the draw-in groove, the elastic clip block in the draw-in groove, and constitute the joint cooperation of separating arc cover and well lid.
3. The zero arcing molded case circuit breaker according to claim 1 or 2, wherein: the arc-isolating cover on be provided with the holding chamber, the arc extinguishing bars piece set up in the holding intracavity, the arc extinguishing bars piece adopt panel formation of bending many times, and be provided with a plurality of round holes on the arc extinguishing bars piece, the arc-isolating cover on be provided with the square through-hole that the round hole is linked together.
4. The zero arcing molded case circuit breaker according to claim 1 or 2, wherein: the terminal cover in correspond every two adjacent wiring terminal chambeies between punishment do not be provided with an division board, well cover and correspond division board department and be provided with the joint groove, one side block of division board in the joint inslot, and constitute the joint cooperation of terminal cover and well lid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120778286.1U CN214378279U (en) | 2021-04-16 | 2021-04-16 | Zero-flashover molded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120778286.1U CN214378279U (en) | 2021-04-16 | 2021-04-16 | Zero-flashover molded case circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214378279U true CN214378279U (en) | 2021-10-08 |
Family
ID=77974553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120778286.1U Active CN214378279U (en) | 2021-04-16 | 2021-04-16 | Zero-flashover molded case circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214378279U (en) |
-
2021
- 2021-04-16 CN CN202120778286.1U patent/CN214378279U/en active Active
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