CN112086327A - Arc extinguishing device of circuit breaker - Google Patents
Arc extinguishing device of circuit breaker Download PDFInfo
- Publication number
- CN112086327A CN112086327A CN201910518118.6A CN201910518118A CN112086327A CN 112086327 A CN112086327 A CN 112086327A CN 201910518118 A CN201910518118 A CN 201910518118A CN 112086327 A CN112086327 A CN 112086327A
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- arc
- circuit breaker
- arc extinguishing
- piece
- face
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- 230000005389 magnetism Effects 0.000 claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 230000006835 compression Effects 0.000 claims description 37
- 238000007906 compression Methods 0.000 claims description 37
- 230000007704 transition Effects 0.000 claims description 29
- 238000005253 cladding Methods 0.000 claims description 17
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 2
- 238000010891 electric arc Methods 0.000 abstract description 17
- 210000001015 abdomen Anatomy 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000004880 explosion Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002242 deionisation method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
Landscapes
- Breakers (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Arc control device of circuit breaker, it includes support piece (2), a plurality of magnetism disk (3) that increase, a plurality of magnetism disks (3) are installed in support piece (2), its characterized in that: the plurality of magnetizing sheets (3) are completely covered by the support (2) or only the end face (304) on one side of the arc outlet (202) is not covered by the support (2) or only the end face (304) and the side face (305) on one side of the arc outlet (202) are not covered by the support (2). This arc extinguishing device of circuit breaker will increase the part of magnetism piece belly bottom rear side and also utilize the gas production piece to wrap up, can guide electric arc to extinguish fast and discharge.
Description
Technical Field
The invention belongs to the technical field of circuit breakers, and particularly relates to an arc extinguishing device of a circuit breaker, which can effectively improve the arc extinguishing capability.
Background
The circuit breaker is an important part in a distribution electrical appliance, is mainly used for an industrial low-voltage power system, and is used for connecting and disconnecting current in a power grid circuit and protecting lines and power supply equipment from damage caused by faults of overload, undervoltage, short circuit, single-phase grounding and the like. The function of the circuit breaker to break overload or short-circuit current is mainly accomplished by an arc extinguishing chamber installed in the circuit breaker. When fault current occurs in the circuit and the current value exceeds the set protection range of the circuit breaker, the tripping mechanism is driven to act, so that the movable contact and the fixed contact of the circuit breaker are quickly disconnected, and at the moment, the air medium is discharged due to the voltage between the movable contact and the fixed contact, so that high-temperature electric arc is generated. During the combustion process, the arc on the one hand causes a sharp rise in the air temperature in the arc quenching device, so that the air ionization is accelerated. On the other hand, the electric arc is divided into a plurality of short arcs by a plurality of arc isolating grid pieces under the pushing of the magnetic field and the fluid effect in the arc extinguishing chamber, the deionization effect of the electric arc is enhanced by the metal arc isolating pieces, the electric arc is reduced, the voltage is rapidly increased, and the electric arc is extinguished.
Chinese patent ZL201721858772.4 discloses a circuit breaker explosion chamber improvement structure, and it includes a pair of curb plate, produces gas spare and a plurality of magnetism increase piece, produce gas spare and a plurality of magnetism increase piece cartridge on the curb plate, produce gas spare and include the cladding panel, the cladding panel stretches out a plurality of gas poles of producing, gas pole and cladding panel form a plurality of cladding chambeies, the shank cartridge of magnetism increase piece is in the cladding chamber, it extends to produce the gas pole the shank of magnetism increase piece. This circuit breaker explosion chamber improvement structure lets electric arc can only pass through from the mid portion of increase magnetic sheet, can increase the gas production volume of explosion chamber by a wide margin, improves the atmospheric pressure in the explosion chamber, has improved the speed of passing through of electric arc simultaneously, avoids electric arc to spill over, has improved high voltage heavy current circuit breaker's breaking capacity by a wide margin, protects the sound contact, has prolonged the life of circuit breaker. However, the arc extinguishing effect of the arc extinguishing chamber can be realized only at one side of the arc isolating grid piece facing the moving contact, and the arc striking effect cannot extend to the belly of the arc isolating grid piece, so that the arc is easy to generate turbulent flow at the back of the arc isolating grid piece, and the arc extinguishing capability of the arc isolating grid piece is reduced.
Disclosure of Invention
The invention aims to provide an arc extinguishing device of a circuit breaker, aiming at the technical defects that the arc extinguishing effect of the existing arc extinguishing chamber can be realized only at one side of an arc isolating grid piece facing a moving contact, the arc is easy to generate turbulent flow at the back of the arc isolating grid piece, and the arc extinguishing capability of the arc isolating grid piece is reduced.
Technical scheme
In order to achieve the technical purpose, the arc extinguishing device of the circuit breaker comprises a support and a plurality of magnetism increasing sheets, wherein the magnetism increasing sheets are installed in the support.
The supporting piece is provided with an arc channel from the open end at the arc inlet of the arc extinguishing chamber to the tail end at the arc outlet of the arc extinguishing chamber, the arc channel at least comprises three sections from the open end at the arc inlet of the arc extinguishing chamber to the tail end at the arc outlet of the arc extinguishing chamber, and the arc channel sequentially comprises an arc entering area, an arc compression transition area and an arc compression area from the open end at the arc inlet of the arc extinguishing chamber;
the method is characterized in that: the magnetism increasing sheets are completely coated by the supporting piece or only the end face at one side of the arc outlet is not coated by the supporting piece or only the end face and the side face at one side of the arc outlet are not coated by the supporting piece.
Furthermore, an arc striking sheet is arranged above the top end of the supporting piece.
Further, the support piece comprises a left insulating piece and a right insulating piece which are integrated.
Furthermore, the supporting piece comprises a pair of side plates and an insulating piece, two ends of the insulating piece and the magnetic increasing pieces are inserted into the pair of side plates which are oppositely arranged face to face, the insulating piece comprises a gas production cover and a gas production cover plate, the first leg parts and the second leg parts of the magnetic increasing pieces are inserted into the corresponding first coating cavities on the gas production cover, and the bodies of the magnetic increasing pieces are inserted into the second coating cavities on the gas production cover plate.
Further, the arc compression transition region gradually narrows to a narrow slit from the side of the arc entrance region to the side of the arc compression region, the opening size of the arc entrance region at the front end of the arc compression transition region is set to be L1, the opening size at the tail end of the arc compression transition region is set to be L2, and then L2 is not more than 1/3L 1.
Further, the arc compression transition area is an arc transition area.
Further, the width of the arc compression area is consistent with the tail end of the arc compression transition area or is continuously reduced from the tail end of the arc compression transition area.
Furthermore, the gas production cover comprises a cladding panel, a plurality of gas production rods extend out of the cladding panel, and the gas production rods and the cladding panel form a plurality of cladding cavities I.
Furthermore, the arc striking plate is positioned above the top end of the magnetism increasing plate and is inserted on the pair of side plates which are arranged oppositely face to face.
Further, the opening size of the arc entrance area at the front end of the arc compression transition area is set to L1, and the opening size at the tail end of the arc compression transition area is set to L2, so that L2 is 1/3L 1.
Advantageous effects
According to the arc extinguishing device of the circuit breaker, the part of the rear side of the belly bottom of the magnetism increasing sheet is wrapped by the gas generating piece, so that electric arcs can be guided to be quickly extinguished and discharged.
Drawings
Fig. 1a is a first schematic structural diagram of embodiment 1 of the present invention.
FIG. 1b is a second schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is an exploded view of embodiment 1 of the present invention.
FIG. 3 is a schematic view of an arc path in embodiment 1 of the present invention.
Fig. 4 is a schematic structural view of a support member in embodiment 1 of the present invention.
FIG. 5 is a schematic structural diagram of embodiment 2 of the present invention.
Fig. 6 is an exploded view of embodiment 2 of the present invention.
FIG. 7 is a schematic structural view of a gas generating cover in example 2 of the present invention.
Fig. 8 is a schematic structural view of a gas production housing plate in embodiment 2 of the present invention.
Fig. 9a is a first schematic structural diagram of embodiment 3 of the present invention.
Fig. 9b is a schematic structural diagram ii of embodiment 3 of the present invention.
Fig. 10 is an exploded view of embodiment 3 of the present invention.
FIG. 11 is a schematic structural view of a supporting member in embodiment 3 of the present invention
Detailed Description
The invention is further explained below with reference to the figures and examples.
Example 1
As shown in fig. 1a, 1b and 2, the arc extinguishing device of the circuit breaker provided in this embodiment includes a support 2 and a plurality of magnetism increasing pieces 3, wherein the plurality of magnetism increasing pieces 3 are installed in the support 2, and in this embodiment, an arc striking piece 5 is further installed above the top end of the support 2. As shown in fig. 4, the support 2 includes a left insulating member 2a and a right insulating member 2b, the left insulating member 2a and the right insulating member 2b are integrated, and only an end face 304 of one side of the arc outlet 202 of the plurality of magnetizing sheets 3 is not covered by the support 2.
As shown in fig. 3, the support 2 is provided with an arc channel a from the open end of the arc inlet 201 of the arc extinguishing chamber to the end of the arc outlet 202 of the arc extinguishing chamber, the arc channel a at least comprises three sections from the open end of the arc inlet 201 of the arc extinguishing chamber to the end of the arc outlet 202 of the arc extinguishing chamber, and the arc channel a sequentially comprises an arc entrance area a1, an arc compression transition area a2 and an arc compression area a3 from the open end of the arc inlet 201 of the arc extinguishing chamber; the arc compression transition area a2 is an arc transition area. The width of the arc compression zone a3 is consistent with the tail end of the arc compression transition zone a2 or is reduced from the tail end of the arc compression transition zone a 2. The arc compression transition region a2 gradually narrows to a narrow slit from the arc entrance region a1 side to the arc compression region a3 side, the opening size of the arc entrance region a1 at the front end of the arc compression transition region a2 is set as L1, the opening size at the tail end of the arc compression transition region a2 is set as L2, then L2 is not more than 1/3L1, and the best arc extinguishing effect is achieved when L2 is 1/3L 1.
When the moving contact and the static contact of the circuit breaker are switched on and switched off to generate electric arcs, the electric arcs are guided by the arc striking plates to pass through the electric arc channel, are compressed from the electric arc entering area a1 through the electric arc compression transition area a2, enter the electric arc compression area a3 after the electric arc moving speed is high, and are always in a compression state, the electric arc moving speed is increased, and the electric arc can be rapidly discharged, so that the electric arc extinguishing capacity is improved.
The structure advantage in this embodiment is: the magnetism increasing sheet is wrapped by the gas production material, so that the function of the magnetism increasing sheet can be effectively exerted, the gas production amount and the gas production capacity in the arc extinguishing chamber can be greatly improved, the arc voltage of the arc can be quickly increased, the arc can be quickly extinguished, the arc extinguishing capacity of a product is improved, and the breaking capacity of the circuit breaker is effectively improved.
Example 2
In another embodiment of the present invention, as shown in fig. 5 and 6, the supporting member 2 includes a pair of side plates 1,1 ' and an insulating member 4, the insulating member 4 and two ends of the magnetization sheets 3 are inserted into the pair of side plates 1,1 ' which are arranged opposite to each other, and the arc striking sheet 5 is located above the top ends of the magnetization sheets 3 and inserted into the pair of side plates 1,1 ' which are arranged opposite to each other.
The insulating member 4 comprises a gas generating cover 401 and a gas generating cover plate 402, as shown in fig. 7, the gas generating cover 401 comprises a cladding panel 401b, the cladding panel 401b extends out of a plurality of gas generating rods 401c, and the gas generating rods 401c and the cladding panel 401b form a plurality of cladding cavities 401a and 401 a'. The first leg part 301 and the second leg part 302 of the plurality of magnetism increasing pieces 3 are inserted into corresponding coating cavities 401a and 401a 'on the gas generating cover 401, the bodies and the abdomen parts 303 of the plurality of magnetism increasing pieces 3 are inserted into a coating cavity 402a on the gas generating cover plate 402 shown in figure 8, and two side surfaces of the plurality of magnetism increasing pieces 3 are coated by the pair of side plates 1 and 1' which are arranged oppositely face to face. The other structure is the same as the first embodiment.
Example 3
In another embodiment of the present invention, as shown in fig. 9a,9b,10 and 11, only the end face 304 and the side face 305 of the plurality of magnetizing sheets 3 at the arc outlet 202 side are not covered by the supporting member 2. The other structure is the same as embodiment 1.
Example 4
In another embodiment of the present invention, the plurality of magnetizing sheets 3 are completely covered by the supporting member 2, and other structures are the same as those of embodiment 1 or embodiment 2.
The structures, ratios, sizes, quantities, and the like shown in the drawings of the embodiments of the present invention are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance. In addition, the terms such as "upper", "lower", "left", "right", "middle", "clockwise" and "counterclockwise" used in the present specification are for clarity of description only, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not limited by the technical contents of the substantial changes, but also considered to be the scope of the present invention.
Claims (10)
1. The arc extinguishing device of the circuit breaker comprises a support piece (2) and a plurality of magnetism increasing pieces (3), wherein the magnetism increasing pieces (3) are installed in the support piece (2).
The supporting piece (2) is provided with an arc channel (a) from the open end of an arc inlet (201) of the arc extinguishing chamber to the tail end of an arc outlet (202) of the arc extinguishing chamber, the arc channel (a) at least comprises three sections from the open end of the arc inlet (201) of the arc extinguishing chamber to the tail end of the arc outlet (202) of the arc extinguishing chamber, and the arc channel (a) sequentially comprises an arc entering area (a1), an arc compression transition area (a2) and an arc compression area (a3) from the open end of the arc inlet (201) of the arc extinguishing chamber;
the method is characterized in that: the plurality of magnetizing sheets (3) are completely covered by the support (2) or only the end face (304) on one side of the arc outlet (202) is not covered by the support (2) or only the end face (304) and the side face (305) on one side of the arc outlet (202) are not covered by the support (2).
2. The arc extinguishing apparatus of the circuit breaker according to claim 1, wherein: and an arc striking sheet (5) is arranged above the top end of the supporting piece (2).
3. The arc extinguishing apparatus of the circuit breaker according to claim 1, wherein: the support piece (2) comprises a left insulating piece (2a) and a right insulating piece (2b), and the left insulating piece (2a) and the right insulating piece (2b) are integrated.
4. The arc extinguishing apparatus of the circuit breaker according to claim 1, wherein: the support piece (2) comprises a pair of side plates (1,1 ') and an insulating piece (4), two ends of the insulating piece (4) and a plurality of magnetism increasing sheets (3) are inserted into the pair of side plates (1,1 ') which are oppositely arranged face to face, the insulating piece (4) comprises a gas production cover (401) and a gas production cover plate (402), a first leg part (301) and a second leg part (302) of the plurality of magnetism increasing sheets (3) are inserted into corresponding first coating cavities (401a, 401a ') of the gas production cover (401), and bodies of the plurality of magnetism increasing sheets (3) are inserted into a second coating cavity (402a) of the gas production cover plate (402).
5. The arc extinguishing apparatus of the circuit breaker according to claim 1, wherein: the arc compression transition region (a2) gradually narrows to a narrow slit from the side of the arc entrance region (a1) to the side of the arc compression region (a3), the opening size of the arc entrance region (a1) at the front end of the arc compression transition region (a2) is set as L1, the opening size of the tail end of the arc compression transition region (a2) is set as L2, and then L2 is less than or equal to 1/3L 1.
6. The arc extinguishing apparatus of the circuit breaker according to claim 1, wherein: the arc compression transition region (a2) is an arc transition region.
7. The arc extinguishing apparatus of the circuit breaker according to claim 1, wherein: the width of the arc compression zone (a3) is consistent with the tail end of the arc compression transition zone (a2) or is reduced continuously from the tail end of the arc compression transition zone (a 2).
8. The arc extinguishing apparatus of the circuit breaker according to claim 4, wherein: the gas production hood (401) comprises a cladding panel (401b), a plurality of gas production rods (401c) extend out of the cladding panel (401b), and the gas production rods (401c) and the cladding panel (401b) form a plurality of cladding cavities I (401a, 401 a').
9. The arc extinguishing apparatus of the circuit breaker according to claim 4, wherein: the arc striking plate (5) is positioned above the top end of the magnetism increasing plate (3) and is inserted on the pair of side plates (1, 1') which are arranged oppositely face to face.
10. The arc extinguishing apparatus of the circuit breaker according to claim 5, wherein: the opening size of an arc entering area (a1) at the front end of the arc compression transition area (a2) is set to be L1, and the opening size of the tail end of the arc compression transition area (a2) is set to be L2, so that L2 is 1/3L 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910518118.6A CN112086327A (en) | 2019-06-14 | 2019-06-14 | Arc extinguishing device of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910518118.6A CN112086327A (en) | 2019-06-14 | 2019-06-14 | Arc extinguishing device of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112086327A true CN112086327A (en) | 2020-12-15 |
Family
ID=73734157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910518118.6A Withdrawn CN112086327A (en) | 2019-06-14 | 2019-06-14 | Arc extinguishing device of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112086327A (en) |
-
2019
- 2019-06-14 CN CN201910518118.6A patent/CN112086327A/en not_active Withdrawn
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201215 |
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| WW01 | Invention patent application withdrawn after publication |