CN209766345U - Arc extinguishing system of direct current breaker - Google Patents
Arc extinguishing system of direct current breaker Download PDFInfo
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- CN209766345U CN209766345U CN201921001242.7U CN201921001242U CN209766345U CN 209766345 U CN209766345 U CN 209766345U CN 201921001242 U CN201921001242 U CN 201921001242U CN 209766345 U CN209766345 U CN 209766345U
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- arc
- arc extinguishing
- permanent magnet
- contact
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Abstract
The utility model relates to a direct current breaker arc extinguishing system, including the static contact, set up arc-extinguishing cover on the static contact, with operating device linkage cooperation and for static contact pivoted moving contact, the arc-extinguishing cover on correspond the static contact department of static contact and be provided with a bar permanent magnet at least, this bar permanent magnet transversely wears to put on the arc-extinguishing cover, and the plane phase that the magnetic induction line of bar permanent magnet and moving contact execution divide-shut brake movement track formed is perpendicular. The utility model has the advantages of simple structure, stable and reliable performance, good arc extinguishing effect, high breaking capacity and long service life.
Description
Technical Field
The utility model relates to a low-voltage apparatus technical field, concretely relates to direct current breaker arc extinguishing system.
Background
A circuit breaker is a switching device capable of carrying and breaking a current under a normal circuit condition and also capable of carrying and breaking a current under an abnormal circuit condition within a predetermined time. With the development of new energy technology, the application of the direct current breaker is more and more, and with the improvement of working voltage, the market puts higher requirements on the reliable breaking performance of the breaker, and the critical breaking difficulty is greatly increased. Technical means such as lengthening the arc by enlarging the opening distance, propelling and cooling the arc by burning a gas generating material, propelling the arc by enhancing a magnetic field, etc. have appeared, but these methods cannot reliably break the circuit under the conditions of high direct current voltage and limited volume. In the technical scheme of enhancing the magnetic field, the magnetic field of an arcing region is enhanced by adding a permanent magnet, so that thrust is generated on an electric arc, and the electric arc is pushed to an arc extinguishing grid sheet; the existing arc extinguishing system adopting the permanent magnet is unreasonable in structural design, the magnetic circuit connecting line of the permanent magnet of the arc extinguishing system is parallel to the plane formed by the rotation of the movable contact, the magnetic field cannot cut the electric arc, and when a large current is cut off, the arc extinguishing effect is not ideal, so that the service life of a short circuit device is shortened.
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, the high branch is disconnected, long-life direct current breaker arc extinguishing system.
In order to achieve the above object, the utility model discloses a direct current breaker arc extinguishing system, including the static contact, set up arc chute on the static contact, with operating device linkage cooperation and for static contact pivoted moving contact, the arc chute on correspond the static contact department of static contact and be provided with a bar permanent magnet at least, this bar permanent magnet transversely wears to put on the arc chute, and the magnetic induction line of bar permanent magnet is perpendicular with the plane that the moving contact execution divide-shut brake movement track formed.
The beneficial effect of above-mentioned structure is: the arc extinguishing cover is provided with the bar-shaped permanent magnet with the magnetism increasing effect, and the magnetic induction line of the bar-shaped permanent magnet is perpendicular to the plane formed by the opening and closing action tracks of the moving contact, so that the magnetic induction line of the bar-shaped permanent magnet is cut with the electric arc, the moving speed and the elongation speed of the electric arc after the moving contact is opened can be increased strongly, the arcing time of critical load current can be effectively reduced, and meanwhile, the breaking time can be improved. Therefore, the arc extinguishing system of the direct current breaker has the advantages of simple structure, stable and reliable performance, good arc extinguishing effect, high breaking capacity and long service life.
Particularly, the number of the strip permanent magnets is two, and the two strip permanent magnets are symmetrically arranged on the arc extinguishing cover. The arc extinguishing cover is provided with two symmetrically distributed strip-shaped permanent magnets, so that the magnetic quenching effect of the arc extinguishing system is effectively enhanced.
Particularly, the included angle between the two strip-shaped permanent magnets and the ground level is 4-10 degrees. The permanent magnet is obliquely arranged, and the magnetic induction line of the permanent magnet and the electric arc form vertical cutting, so that the magnetic quenching effect is enhanced.
Particularly, the arc extinguishing cover comprises an arc isolating plate covering the upper part of the fixed contact, two insulating plates symmetrically arranged on two sides of the arc isolating plate, and a plurality of grid pieces, wherein the grid pieces are arranged between the two insulating plates at intervals along the action track of the moving contact for performing switching on and off, and an arc extinguishing cavity is formed between the grid pieces. A plurality of bars are the arc orbit and distribute on the flash barrier, have effectively shortened the interval of bars and moving contact, are favorable to the bars to extinguish electric arc fast, strengthen the arc extinguishing effect.
Particularly, the two sides of the arc isolating plate corresponding to the static contact are respectively provided with a square clamping groove, and the strip-shaped permanent magnet penetrates through the square clamping grooves and is matched with the arc isolating plate in a clamping manner. The bar permanent magnet is connected with the flash barrier in a clamping and matching mode, so that the bar permanent magnet and the flash barrier are convenient to assemble, and the assembly efficiency of the arc extinguishing system is improved.
Particularly, a partition plate is arranged on one side of the arc isolating plate, the partition plate is attached to an opening of the square clamping groove and can tightly press the strip-shaped permanent magnet in the square clamping groove, a clamping groove is formed in the partition plate, and a moving contact of the moving contact penetrates through the clamping groove and extends into the arc isolating plate. The baffle can avoid the bar permanent magnet to drop from the flash barrier, and is formed with the arc extinguishing space between baffle and the flash barrier, can avoid the residual electric arc to leap out from the flash barrier, is favorable to strengthening the arc extinguishing effect.
Particularly, an arc isolating piece is arranged on one side of the movable contact corresponding to the movable contact, and a plug pin is arranged on the movable contact corresponding to the arc isolating piece and penetrates through the arc isolating piece and is connected to the movable contact. The arc isolating piece is arranged on the movable contact, so that the arc isolating piece can prevent residual electric arc from jumping out along the movable contact, and the arc extinguishing effect can be enhanced.
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 schematic view of the internal structure of the embodiment of the present invention.
Fig. 4 is a structural schematic diagram of an arc stress direction according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of the arc motion trajectory structure in forward current of the embodiment of the present invention.
Fig. 6 is a schematic view of the arc motion trajectory structure in the reverse current of the embodiment of the present invention.
Detailed Description
As shown in fig. 1-6, the embodiment of the utility model provides a direct current breaker arc extinguishing system, including static contact 10, set up arc-extinguishing cover 20 on static contact 10, with operating device linkage cooperation and for static contact 10 pivoted moving contact 11, arc-extinguishing cover 20 on correspond static contact 10 stationary contact 101 department and be provided with a bar permanent magnet 30 at least, this bar permanent magnet 30 transversely wears to put 20 on the arc-extinguishing cover, and bar permanent magnet 30's magnetic induction line is perpendicular with the plane that moving contact 11 execution divide-shut brake movement orbit formed. The number of the strip-shaped permanent magnets 30 is two, and the two strip-shaped permanent magnets 30 are symmetrically arranged on the arc extinguishing chamber 20. The arc extinguishing cover is provided with two symmetrically distributed strip-shaped permanent magnets, so that the magnetic quenching effect of the arc extinguishing system is effectively enhanced. The included angle between the two strip-shaped permanent magnets 30 and the ground level is 4-10 degrees. The permanent magnet is obliquely arranged, and the magnetic induction line of the permanent magnet and the electric arc form vertical cutting, so that the magnetic quenching effect is enhanced.
As shown in fig. 2, the arc-extinguishing chamber 20 includes an arc-isolating plate 21 covering the fixed contact 10, two insulating plates 22 symmetrically disposed on two sides of the arc-isolating plate 21, and a plurality of grids 23, the grids 23 are arranged between the two insulating plates 22 at intervals along the trajectory of the moving contact 11 performing the opening and closing operation, and an arc-extinguishing chamber 231 is formed between the grids 23. A plurality of bars are the arc orbit and distribute on the flash barrier, have effectively shortened the interval of bars and moving contact, are favorable to the bars to extinguish electric arc fast, strengthen the arc extinguishing effect. The two sides of the arc isolating plate 21 corresponding to the stationary contact 101 are respectively provided with a square clamping groove 211, and the bar-shaped permanent magnet 30 penetrates through the square clamping grooves 211 and is matched with the arc isolating plate 21 in a clamping manner. The bar permanent magnet is connected with the flash barrier in a clamping and matching mode, so that the bar permanent magnet and the flash barrier are convenient to assemble, and the assembly efficiency of the arc extinguishing system is improved. A partition plate 24 is arranged on one side of the arc isolating plate 21, the partition plate 24 is attached to an opening of the square clamping groove 211 and can press the bar-shaped permanent magnet 30 in the square clamping groove 211, a clamping groove 241 is arranged on the partition plate 24, and the movable contact 111 of the movable contact 11 penetrates through the clamping groove 241 and extends into the arc isolating plate 21. The baffle can avoid the bar permanent magnet to drop from the flash barrier, and is formed with the arc extinguishing space between baffle and the flash barrier, can avoid the residual electric arc to leap out from the flash barrier, is favorable to strengthening the arc extinguishing effect. An arc isolating piece 112 is arranged on one side of the moving contact 11 corresponding to the moving contact 111, a plug pin 113 is arranged on the moving contact 11 corresponding to the arc isolating piece 112, and the plug pin 113 penetrates through the arc isolating piece 112 and is connected to the moving contact 11. The arc isolating piece is arranged on the movable contact, so that the arc isolating piece can prevent residual electric arc from jumping out along the movable contact, and the arc extinguishing effect can be enhanced.
The arc extinguishing cover is provided with the strip permanent magnets with the magnetism increasing effect, magnetic induction lines of the strip permanent magnets are perpendicular to a plane formed by the moving contact executing the opening and closing action track, as shown in fig. 4, the acting force of magnetic fields of the two strip permanent magnets on the electric arc can realize the cutting of the magnetic induction lines of the two strip permanent magnets and the electric arc, the moving speed and the elongation speed of the electric arc after the moving contact is opened can be increased powerfully, the arcing time of critical load current can be effectively reduced, and meanwhile, the breaking time can also be improved. Therefore, the arc extinguishing system of the direct current breaker has the advantages of simple structure, stable and reliable performance, good arc extinguishing effect, high breaking capacity and long service life. As shown in fig. 5, when the current is in the positive direction, the magnetic induction lines of the two bar-shaped permanent magnets can be cut on the arc track, and the magnetic field generated by the bar-shaped permanent magnets can push the arc to move towards the arc-extinguishing grid piece, so as to achieve the purpose of arc extinguishing; as shown in fig. 6, when the current is in the reverse direction, the magnetic induction lines of the two bar-shaped permanent magnets can be cut on the arc track, and the magnetic field generated by the bar-shaped permanent magnets can push the arc to move towards the arc-extinguishing grid piece, so as to achieve the purpose of arc extinguishing; therefore, the arc extinguishing system can adapt to forward and reverse currents, has wider application range and more obvious arc extinguishing effect.
Claims (7)
1. The utility model provides a direct current circuit breaker arc extinguishing system which characterized in that: the arc extinguishing system comprises a fixed contact, an arc extinguishing cover arranged on the fixed contact and a moving contact which is in linkage fit with an operating mechanism and rotates relative to the fixed contact, wherein at least one strip-shaped permanent magnet is arranged on the arc extinguishing cover at a position corresponding to the fixed contact of the fixed contact, the strip-shaped permanent magnet transversely penetrates through the arc extinguishing cover, and a magnetic induction line of the strip-shaped permanent magnet is perpendicular to a plane formed by an action track of the moving contact for performing opening and closing.
2. The dc circuit breaker arc extinguishing system of claim 1, wherein: the number of the strip-shaped permanent magnets is two, and the two strip-shaped permanent magnets are symmetrically arranged on the arc extinguishing cover.
3. The dc circuit breaker arc extinguishing system of claim 2, wherein: the included angle between the two strip-shaped permanent magnets and the horizontal line is 4-10 degrees.
4. The dc circuit breaker arc extinguishing system of claim 1 or 2, wherein: the arc extinguishing shield comprises an arc isolation plate covering the upper part of the fixed contact, two insulation plates symmetrically arranged on two sides of the arc isolation plate, and a plurality of grid pieces, wherein the grid pieces are arranged between the two insulation plates at intervals along the moving contact executing opening and closing action track, and an arc extinguishing cavity is formed between the grid pieces.
5. The dc circuit breaker arc extinguishing system of claim 4, wherein: the two sides of the arc isolating plate corresponding to the static contact are respectively provided with a square clamping groove, and the strip-shaped permanent magnet penetrates through the square clamping grooves and is matched with the arc isolating plate in a clamping manner.
6. The dc circuit breaker arc extinguishing system of claim 5, wherein: the movable contact of moving contact pass the draw-in groove and extend inside the flash barrier.
7. The dc circuit breaker arc extinguishing system of claim 1 or 2, wherein: and the movable contact is provided with a bolt corresponding to the arc isolating piece, and the bolt penetrates through the arc isolating piece and is connected to the movable contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921001242.7U CN209766345U (en) | 2019-06-29 | 2019-06-29 | Arc extinguishing system of direct current breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921001242.7U CN209766345U (en) | 2019-06-29 | 2019-06-29 | Arc extinguishing system of direct current breaker |
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| Publication Number | Publication Date |
|---|---|
| CN209766345U true CN209766345U (en) | 2019-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921001242.7U Active CN209766345U (en) | 2019-06-29 | 2019-06-29 | Arc extinguishing system of direct current breaker |
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| CN (1) | CN209766345U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110148546A (en) * | 2019-06-29 | 2019-08-20 | 环宇集团浙江高科股份有限公司 | A kind of dc circuit breaker arc quenching system |
-
2019
- 2019-06-29 CN CN201921001242.7U patent/CN209766345U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110148546A (en) * | 2019-06-29 | 2019-08-20 | 环宇集团浙江高科股份有限公司 | A kind of dc circuit breaker arc quenching system |
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Address after: 325603 Wenzhou Daqiao Industrial Park, Yueqing City, Wenzhou City, Zhejiang Province Patentee after: Huanyu Hi Tech Co.,Ltd. Address before: 325603 Wenzhou Daqiao Industrial Park, Yueqing City, Wenzhou City, Zhejiang Province Patentee before: HUANYU GROUP ZHEJIANG HIGH-TECH Co.,Ltd. |