CN219066738U - Direct current breaker with high protection function - Google Patents
Direct current breaker with high protection function Download PDFInfo
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- CN219066738U CN219066738U CN202223408629.9U CN202223408629U CN219066738U CN 219066738 U CN219066738 U CN 219066738U CN 202223408629 U CN202223408629 U CN 202223408629U CN 219066738 U CN219066738 U CN 219066738U
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- arc
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- arc striking
- protection function
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Abstract
The utility model relates to a direct current breaker with high protection function, which comprises two breaker units, wherein each breaker unit comprises a shell, an operating mechanism, a contact system, an arc extinguishing chamber, an arc striking plate, an electromagnetic release and a wiring terminal, the contact system comprises a moving contact and a fixed contact, one end of the fixed contact is provided with an arc striking part extending above the arc extinguishing chamber, the other end of the fixed contact is provided with an arc striking angle bending and extending towards the direction of the arc extinguishing chamber, the tail part of the arc striking angle extends in the arc extinguishing chamber, a magnetic conduction sheet attached in the arc striking angle is arranged in the shell, one end of the arc striking plate is attached to the lower end of the arc extinguishing chamber, the other end of the arc striking plate extends towards the direction of the moving contact, an arc striking channel is formed between the arc striking plate and the fixed contact, the arc striking channel is communicated between the moving contact and the arc extinguishing chamber, and one side of the shell, corresponding to the arc striking plate, is provided with a magnetic conduction plate. The utility model has the advantages of simple structure, stable and reliable performance, high breaking, high safety and high protection function.
Description
Technical Field
The utility model relates to the technical field of circuit breakers, in particular to a direct current circuit breaker with a high protection function.
Background
The miniature circuit breaker is also called miniature circuit breaker, is suitable for overload and short-circuit protection of the line with rated voltage of 230/400V of alternating current 50/60Hz and rated current not exceeding 125A, and can be used as infrequent operation conversion of the line under normal conditions. The miniature circuit breaker is mainly used in various places such as industry, business, high-rise and civil houses. In dc power systems, small dc circuit breakers are commonly used. The current miniature direct current circuit breaker has poor arc extinguishing performance, thereby resulting in poor breaking capacity of the miniature direct current circuit breaker. After the multipole assembly of the direct-current miniature circuit breaker, the creepage distance between the wiring terminals of the multipole direct-current miniature circuit breaker is insufficient, the protection performance and the insulation performance are poor, and potential safety hazards exist.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide the direct current breaker with the high protection function, which has the advantages of simple structure, stable and reliable performance, high breaking and high safety.
In order to achieve the above purpose, the utility model adopts the direct current breaker with high protection function, which comprises two breaker units assembled with each other, the breaker units comprise a shell, an operating mechanism, a contact system, an arc extinguishing chamber, an arc striking plate, an electromagnetic release and a wiring terminal, the contact system comprises a moving contact and a fixed contact which are in linkage fit with the operating mechanism, the fixed contact is matched with the moving contact, one end of the fixed contact is provided with an arc striking part extending above the arc extinguishing chamber, the other end of the fixed contact is provided with an arc striking angle bending and extending towards the direction of the arc extinguishing chamber, the tail part of the arc striking angle extends in the arc extinguishing chamber, the shell is internally provided with a magnetic conduction sheet attached in the arc striking angle, one end of the arc striking plate is attached to the lower end of the arc extinguishing chamber, the other end of the arc striking plate extends towards the direction of the moving contact, an arc striking channel is formed between the arc striking plate and the fixed contact, the arc striking channel is communicated between the moving contact and the arc extinguishing chamber, and one side of the corresponding to the arc striking plate in the shell is provided with a magnetic conduction plate.
The beneficial effects of the structure are as follows: the magnetic conduction plate is arranged on one side of the arc striking plate, can play a role in magnetic blowing and arc extinguishing, is favorable for accelerating the arc extinguishing speed, and is provided with the magnetic conduction sheet in the arc striking angle on the static contact, the magnetic conduction sheet can accelerate the electric arc to enter the arc extinguishing chamber, the arc extinguishing effect is better, and the breaking capacity of the direct current breaker is favorable for being improved. Therefore, the direct current miniature circuit breaker has the advantages of simple structure, stable and reliable performance, high breaking speed and high safety.
Particularly, two sides of the two circuit breaker units corresponding to the wiring holes are respectively provided with a separation sheet, and an isolation groove is arranged between two adjacent separation sheets corresponding to the two circuit breaker units. The creepage distance between two circuit breaker units can be increased to separate the separation blade, and insulating properties is better, and protective properties is better, and the security is higher.
In particular, one end of a coil of the electromagnetic release is welded on the fixed contact, and the other end of the coil is welded on the connecting terminal. The electromagnetic release, the fixed contact and the wiring terminal are integrated and modularized, so that the modularized assembly of the direct-current miniature circuit breaker is facilitated, and the assembly efficiency is higher.
Particularly, two arc striking convex strips are respectively arranged in the corresponding arc striking channels on the shell, the two arc striking convex strip automatic contacts extend towards the direction of the arc extinguishing chamber, and an arc striking groove is formed between the two arc striking convex strips. The arc striking convex strips can cut the arc, so that the arc is cooled, the arc striking grooves can guide the arc, the arc can enter the arc extinguishing chamber quickly, and the arc is extinguished quickly.
Particularly, an arc-isolating raised strip is arranged on the shell corresponding to one side of the movable contact, and the two arc-isolating raised strips enclose the two arc-striking raised strips in the arc-striking channel. The arc-isolating convex strips play a role in isolating the arc, so that the arc can enter the arc-extinguishing chamber rapidly, and the arc-extinguishing effect of the direct current breaker is improved.
Particularly, a plurality of convex strips which are distributed at intervals are respectively arranged on one side of the arc-isolating convex strips facing the movable contact. The convex strips on the arc isolation convex strips can play a role in cutting the arc, are favorable for cooling the arc, and can improve the arc extinguishing performance of the direct current breaker.
Drawings
Fig. 1 is a perspective view of an embodiment of the present utility model.
Fig. 2 is a perspective view showing an internal structure of the embodiment of the present utility model.
Fig. 3 is a front view of an internal structure of an embodiment of the present utility model.
Detailed Description
As shown in fig. 1 to 3, the embodiment of the utility model is a direct current circuit breaker with high protection function, which comprises two circuit breaker units 100 assembled with each other, the circuit breaker units 100 comprise a shell 10, an operating mechanism 11, a contact system 20, an arc extinguishing chamber 12, an arc striking plate 13, an electromagnetic release 14 and a connecting terminal 15, the contact system 20 comprises a moving contact 21 and a fixed contact 22 matched with the moving contact 21 in a linkage manner with the operating mechanism 11, one end of the fixed contact 22 is provided with an arc striking part 221 extending above the arc extinguishing chamber 12, the other end of the fixed contact 22 is provided with an arc striking angle 222 bending and extending towards the arc extinguishing chamber 12, the tail part of the arc striking angle 222 extends in the arc extinguishing chamber 12, one end of the arc striking plate 13 is attached to the lower end of the arc extinguishing chamber 12, the other end of the arc striking plate 13 extends towards the moving contact 21, an arc striking passage 200 is formed between the arc striking plate 13 and the fixed contact 22, and the arc striking plate 200 is arranged at one side of the arc striking plate 24 corresponding to the arc striking plate 12 in the shell 10. Two sides of the housing 10 of the two circuit breaker units 100 corresponding to the wiring holes 101 are respectively provided with a separation sheet 102, and a separation groove 103 is arranged between two adjacent separation sheets 102 corresponding to the housing 10 of the two circuit breaker units 100. The creepage distance between two circuit breaker units can be increased to separate the separation blade, and insulating properties is better, and protective properties is better, and the security is higher.
As shown in fig. 2 and 3, one end of a coil 141 of the electromagnetic release 14 is welded to the fixed contact 22, and the other end of the coil 141 is welded to the connecting terminal 15. The electromagnetic release, the fixed contact and the wiring terminal are integrated and modularized, so that the modularized assembly of the direct-current miniature circuit breaker is facilitated, and the assembly efficiency is higher. Two arc striking raised strips 104 are respectively arranged on the corresponding arc striking channels 200 of the shell 10, the automatic contacts 21 of the two arc striking raised strips 104 extend towards the direction of the arc extinguishing chamber 12, and an arc striking groove 105 is formed between the two arc striking raised strips 104. The arc striking convex strips can cut the arc, so that the arc is cooled, the arc striking grooves can guide the arc, the arc can enter the arc extinguishing chamber quickly, and the arc is extinguished quickly. An arc-isolating raised strip 106 is arranged on the shell 10 at one side of the movable contact 211 corresponding to the movable contact 21, and the arc-isolating raised strip 106 encloses the two arc-striking raised strips 104 in the arc-striking channel 200. The arc-isolating convex strips play a role in isolating the arc, so that the arc can enter the arc-extinguishing chamber rapidly, and the arc-extinguishing effect of the direct current breaker is improved. The arc-isolating convex strips 106 are respectively provided with a plurality of convex strips 107 which are distributed at intervals on the side facing the movable contact 211. The convex strips on the arc isolation convex strips can play a role in cutting the arc, are favorable for cooling the arc, and can improve the arc extinguishing performance of the direct current breaker.
The magnetic conduction plate is arranged on one side of the arc striking plate, can play a role in magnetic blowing and arc extinguishing, is favorable for accelerating the arc extinguishing speed, and is provided with the magnetic conduction sheet in the arc striking angle on the static contact, the magnetic conduction sheet can accelerate the electric arc to enter the arc extinguishing chamber, the arc extinguishing effect is better, and the breaking capacity of the direct current breaker is favorable for being improved. Therefore, the direct current miniature circuit breaker has the advantages of simple structure, stable and reliable performance, high breaking speed and high safety.
Claims (6)
1. The utility model provides a direct current circuit breaker of high safeguard function, includes two circuit breaker units of mutually assembling, circuit breaker unit include casing, operating device, contact system, explosion chamber, striking board, electromagnetic release, binding post, its characterized in that: the contact system include with operating device linkage complex moving contact, with moving contact matched with stationary contact, stationary contact one end have the striking portion that extends in the explosion chamber top, the stationary contact other end have the striking angle that extends of bending to the explosion chamber direction, the afterbody of striking angle extends in the explosion chamber, the casing in set up the magnetic conduction piece of laminating in the striking angle, striking plate one end laminating on the lower extreme of explosion chamber, the striking plate other end extend to the moving contact direction, and be formed with the striking passageway between striking plate and the stationary contact, the striking passageway intercommunication between moving contact and explosion chamber, one side department of corresponding the striking plate in the casing be provided with the magnetic conduction board.
2. The high protection function dc breaker according to claim 1, wherein: two sides of the two circuit breaker units corresponding to the wiring holes are respectively provided with a separation sheet, and an isolation groove is arranged between two adjacent separation sheets on the two circuit breaker units.
3. The high protection function dc breaker according to claim 1 or 2, characterized in that: one end of a coil of the electromagnetic release is welded on the fixed contact, and the other end of the coil is welded on the wiring terminal.
4. The high protection function dc breaker according to claim 1 or 2, characterized in that: two arc striking convex strips are respectively arranged in the corresponding arc striking channels on the shell, the two arc striking convex strip automatic contacts extend towards the direction of the arc extinguishing chamber, and an arc striking groove is formed between the two arc striking convex strips.
5. The high protection function dc breaker according to claim 4, wherein: the shell body on correspond moving contact one side department and be provided with and separate the arc sand grip, should separate the arc sand grip and enclose two striking sand grips in striking the arc passageway.
6. The high protection function dc breaker according to claim 5, wherein: the arc-isolating raised strips are respectively provided with a plurality of raised strips which are distributed at intervals on one side of the arc-isolating raised strips facing the movable contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223408629.9U CN219066738U (en) | 2022-12-17 | 2022-12-17 | Direct current breaker with high protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223408629.9U CN219066738U (en) | 2022-12-17 | 2022-12-17 | Direct current breaker with high protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219066738U true CN219066738U (en) | 2023-05-23 |
Family
ID=86374206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223408629.9U Active CN219066738U (en) | 2022-12-17 | 2022-12-17 | Direct current breaker with high protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219066738U (en) |
-
2022
- 2022-12-17 CN CN202223408629.9U patent/CN219066738U/en active Active
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