CN205645727U - Miniature circuit breaker's arc extinguishing structure - Google Patents
Miniature circuit breaker's arc extinguishing structure Download PDFInfo
- Publication number
- CN205645727U CN205645727U CN201620293400.0U CN201620293400U CN205645727U CN 205645727 U CN205645727 U CN 205645727U CN 201620293400 U CN201620293400 U CN 201620293400U CN 205645727 U CN205645727 U CN 205645727U
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- Prior art keywords
- shell
- circuit breaker
- arc extinguishing
- miniature circuit
- pressure release
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- Breakers (AREA)
Abstract
The utility model provides a miniature circuit breaker arc extinguishing structure, miniature circuit breaker include the confined shell and establish operating mechanism (1), moving contact (2), static contact (3) and the arc extinguishing bars piece (5) in the casing, characterized by: be fixed with between moving contact and static contact and shell and produce gas material (4), the shell in be equipped with and access to onset of arcing regional pressure releasing pathway (6) and cooling airduct (8) respectively, pressure releasing pathway's export is established at the shell top up to be equipped with safe metal mesh baffle (7), cooling airduct's air inlet is established at the shell middle part. The utility model discloses can further improve the miniature circuit breaker extinguished electric arc effect that gas material arc extinguishing was produced in current adoption, and safe and reliable more.
Description
Technical field
This utility model relates to a kind of miniature circuit breaker arc extinguishing structure being applicable to low-voltage distributing line.
Background technology
Chopper is typically made up of moving contact, static contact, arc extinguishing grid pieces, gas exhausted material and actuating mechanism etc., existing
Some choppers are usually the Main Means using arc extinguishing grid pieces as extinguishing electric arc, are aided with gas exhausted material and promote
Extinguish electric arc ability.Its principle is gas exhausted material by producing gas after arc erosion, can increase circuit breaker internal pressure
Power, it forms arc extinguishing air-flow with the difference of external atmospheric pressure.On the one hand this air-flow can promote electric arc to move to grid
And entering sheet, another what is more important, the gas that gas exhausted material produces has good heat conductivility, right
Cooling electric arc plays a key effect.
The arc extinguishing air-flow that concrete analysis gas exhausted material is formed is in circuit breaker internal motion conditions, due to free convection
Effect, scorching hot air-flow moves upward, and then electric arc is also with moving upward, after arc extinguishing grid pieces,
Without completely by arc extinction, or because inner body burns generation metallic vapour, plastics through electric arc
The materials such as carbonized particles, if being not added with discharging shell with intercepting, the use to chopper will result in potential safety hazard.
Furthermore, the hyperbar arc extinguishing air-flow that gas exhausted material is formed, dredge without good passage, at chopper
Internal any low pressure regions being in communication with the outside is freely-movable, is also unfavorable for that electric arc is entered by the energy of focused airflow
Row convection current cools down, and weakens gas exhausted material and extinguishes the effect of electric arc.
Utility model content
Technical problem to be solved in the utility model, it is simply that the arc extinguishing structure of a kind of miniature circuit breaker is provided, its
It is provided with air-flow pressure release passage needed for internal motion and outside air enters the passage supplementing cooling, one can be entered
The miniature circuit breaker of the step existing employing gas exhausted material of raising is after electric arc occurs, and internal arc extinguishing air-flow discharges shell
Ability, security reliability.
For solving above-mentioned technical problem, the technical solution adopted in the utility model is:
A kind of miniature circuit breaker arc extinguishing structure, described miniature circuit breaker includes the shell closed and is located at housing
Interior operating mechanism 1, moving contact 2, static contact 3 and arc extinguishing grid pieces 5, is characterized in that: at moving contact and stationary contact
It is fixed with gas exhausted material 4 between head and shell, in shell, is provided with the pressure release passage respectively leading to electric arc generation area
6 and cooling airway 8, the outlet of pressure release passage 6 is located at cover top portion upward, and equipped with safe wire netting dividing plate 7,
The air inlet of cooling airway 8 is located in the middle part of shell.
The inlet structure of described cooling airway 8 is: have two parallel elongated holes, inwall in the middle part of shell
It is fixed with an elbow；The export structure of described pressure release passage 6 is: cover top portion have two parallel elongated
Hole, inwall is fixed with an elbow.
Described gas exhausted material 4 is tabular, surface is pressed with parallel groove and has some installing holes, plate
Profile adapt to space in housing, gas exhausted material 4 passes installing hole by connector and is fixed in housing.
Described safe wire netting partition 7 is channel-section steel shape, wing plate is covered with aperture, web has installing hole,
The outlet of pressure release passage 6 it is fixed on by connector.
Beneficial effect: after this utility model so improves, when the gas exhausted material of circuit breaker internal is through arc erosion
After, a large amount of gas can be discharged at short notice, relative external atmosphere pressure forms hyperbar air-flow, because electric arc meeting
Heating this air-flow, hot-air moves upward, and the pressure release passage 6 being provided with at chopper top is in communication with the outside,
Be relatively low atmospheric region at this, arc extinguishing air-flow will by concentrated vectoring to this region, and inner and outer air pressure difference work
Discharge from bleed passage quickly through arc extinguishing grid pieces 5 under with, thus avoid air-flow to escape in circuit breaker internal disorder
Ill effect, simultaneously for guarantee the safety that product runs, above pressure release passage equipped with safe wire netting every
Plate 7, can intercept the materials such as the metallic vapour of electric arc generation, plastics carbonized particles and discharge the possibility of shell, reach
To safer arc extinction performance.Another improvement effect is: arc extinguishing air-flow quickly discharges the inside caused angrily
Intermediate pressure section, outside air can supplement into rapidly from cooling airway 8, can make convection current cooling effect more preferably,
Cooled down by continuous circulative convection so that the gas exhausted material in miniature circuit breaker extinguishes the performance of electric arc and significantly carries
Rise.
Accompanying drawing explanation
Fig. 1 is miniature circuit breaker arc extinguishing structure embodiment schematic perspective view of the present utility model；
Fig. 2 is miniature circuit breaker arc extinguishing structure embodiment principle schematic of the present utility model；
Fig. 3 is this utility model cooling airway (enlarged drawing A), pressure release passage (enlarged drawing B) structural representation；
Fig. 3 A is the partial enlarged drawing A of Fig. 3；
Fig. 3 B is the partial enlarged drawing B of Fig. 3；
Fig. 4 is this utility model gas exhausted material structural representation；
Fig. 5 is this utility model safe wire netting spacer structure schematic diagram.
Detailed description of the invention
Seeing Fig. 1 and Fig. 2, miniature circuit breaker arc extinguishing structure embodiment of the present utility model, outside closing
Shell and the operating mechanism 1 being located in housing, moving contact 2, static contact 3 and arc extinguishing grid pieces 5, at moving contact
And between static contact and shell, it is fixed with gas exhausted material 4.
It is provided with pressure release passage 6 and cooling airway 8, the pressure release passage respectively leading to electric arc generation area in the enclosure
The outlet of 6 is located at cover top portion upward, and equipped with safe wire netting dividing plate 7, the air inlet of cooling airway 8 sets
In the middle part of shell.
Seeing Fig. 3 and Fig. 3 A, Fig. 3 B, the inlet structure of cooling airway 8 is: have two in the middle part of shell
Parallel elongated hole, two parallel elongated hole place inwalls are fixed with an elbow；The outlet knot of pressure release passage 6
Structure is: cover top portion has two parallel elongated holes, and it is curved that two parallel elongated hole place inwalls are fixed with one
Head.
Seeing Fig. 4, gas exhausted material 4 is tabular, surface is pressed with parallel groove and has some installing holes,
The profile of plate adapts to space in housing, and gas exhausted material 4 is fixed in housing through installing hole by connector.
Seeing Fig. 5, safe wire netting partition 7 is channel-section steel shape, wing plate is covered with aperture, web has installation
Hole, is fixed on the outlet of pressure release passage 6 by connector.
Cooling airway 8 on housing, pressure release passage 6 structure is shown in Fig. 3, according to the direction of air motion, design
Become the mode of band water conservancy diversion partition, the entrance of guiding gas and discharge.
Being fixed with gas exhausted material 4 between moving contact and static contact and shell, the structural member of gas exhausted material is shown in Fig. 4,
Cooling airway according to air inlet and the position characteristics of arc extinguishing grid pieces, be designed to the opening group with a plurality of pod and skewed slot
Conjunction mode, guiding gas rapidly enters the region of arc extinguishing grid pieces.
Pressure release passage outlet on housing is located at cover top portion upward, and equipped with safe wire netting dividing plate 7, safety
The structure of wire netting dividing plate is shown in Fig. 5, U-shaped metallic plate punching form, and this hole is staggered for 2 layers, both
The smooth discharge of air-flow can be kept, it is possible to the nuisances such as metallic vapour that electric arc is produced, plastics carbonized particles
Matter makes effectively interception.
Whole miniature circuit breaker arc extinguishing process is as follows:
When mechanism 1 performs chopper disjunction action, electric arc between moving contact 2 and static contact 3, will be produced, this
Scheme places gas exhausted material 4 between dynamic/static contact and shell, when after arc erosion gas exhausted material, in inside
Forming the strong air flow with external atmosphere pressure pressure differential in space, on the one hand this air-flow can promote electric arc to accelerate to going out
Arc grid is moved and enters sheet, also electric arc is carried out convection current cooling, make electric arc under the effect of magnetic field and air-flow,
Finally in arc extinguishing grid pieces region, cooling is extinguished.And the high-temperature high-pressure air flow that gas exhausted material produces, by pressure release passage 6
Guide to safe wire netting partition 7, be expelled to safely outside housing after filtering, when completing this process,
For the pressure differential inside and outside balance, outside air supplements via cooling duct 8 and enters inside, plays cooling effect.
Claims (4)
1. a miniature circuit breaker arc extinguishing structure, described miniature circuit breaker includes shell, the Yi Jishe closed
Operating mechanism (1), moving contact (2), static contact (3) and arc extinguishing grid pieces (5), its feature in housing
It is: between moving contact and static contact and shell, be fixed with gas exhausted material (4) to be provided with in described shell respectively
Leading to pressure release passage (6) and the cooling airway (8) of electric arc generation area, the outlet of pressure release passage (6) is upward
It is located at cover top portion, and equipped with safe wire netting dividing plate (7), the air inlet of cooling airway (8) is located at shell
Middle part.
Miniature circuit breaker arc extinguishing structure the most according to claim 1, is characterized in that: described cooling airway
(8) inlet structure is: have two parallel elongated holes in the middle part of shell, and inwall is fixed with an elbow；
The export structure of described pressure release passage (6) is: cover top portion has two parallel elongated holes, and inwall is solid
Surely there is an elbow.
Miniature circuit breaker arc extinguishing structure the most according to claim 2, is characterized in that: described aerogenesis material
Material (4) is tabular, surface is pressed with parallel groove and has some installing holes, and the profile of plate adapts to shell
Internal space, gas exhausted material (4) is fixed in housing through installing hole by connector.
Miniature circuit breaker arc extinguishing structure the most according to claim 3, is characterized in that: described safety gold
Belonging to net partition (7) is channel-section steel shape, wing plate is covered with aperture, web has installing hole, solid by connector
It is scheduled on the outlet of pressure release passage (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620293400.0U CN205645727U (en) | 2016-07-13 | 2016-07-13 | Miniature circuit breaker's arc extinguishing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620293400.0U CN205645727U (en) | 2016-07-13 | 2016-07-13 | Miniature circuit breaker's arc extinguishing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205645727U true CN205645727U (en) | 2016-10-12 |
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ID=57067736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620293400.0U Active CN205645727U (en) | 2016-07-13 | 2016-07-13 | Miniature circuit breaker's arc extinguishing structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109304064A (en) * | 2017-07-26 | 2019-02-05 | 施耐德电器工业公司 | Fire-suppressant gas filter device and amperage switching devices including this filter device |
| CN109741998A (en) * | 2019-02-27 | 2019-05-10 | 武汉司德宝电气有限公司 | A kind of breaker |
| CN112053923A (en) * | 2019-06-05 | 2020-12-08 | 上海良信电器股份有限公司 | Improved arc-extinguishing device for low-voltage switch |
| CN112820593A (en) * | 2021-02-07 | 2021-05-18 | 浙江世隆电气科技有限公司 | Wiring device of circuit breaker |
| CN112820604A (en) * | 2021-02-07 | 2021-05-18 | 浙江世隆电气科技有限公司 | Zero-flashover molded case circuit breaker |
-
2016
- 2016-07-13 CN CN201620293400.0U patent/CN205645727U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109304064A (en) * | 2017-07-26 | 2019-02-05 | 施耐德电器工业公司 | Fire-suppressant gas filter device and amperage switching devices including this filter device |
| CN109304064B (en) * | 2017-07-26 | 2022-03-04 | 施耐德电器工业公司 | Fire extinguishing gas filter device and current switching device comprising such a filter device |
| CN109741998A (en) * | 2019-02-27 | 2019-05-10 | 武汉司德宝电气有限公司 | A kind of breaker |
| CN109741998B (en) * | 2019-02-27 | 2024-01-09 | 武汉司德宝电气有限公司 | Circuit breaker |
| CN112053923A (en) * | 2019-06-05 | 2020-12-08 | 上海良信电器股份有限公司 | Improved arc-extinguishing device for low-voltage switch |
| CN112820593A (en) * | 2021-02-07 | 2021-05-18 | 浙江世隆电气科技有限公司 | Wiring device of circuit breaker |
| CN112820604A (en) * | 2021-02-07 | 2021-05-18 | 浙江世隆电气科技有限公司 | Zero-flashover molded case circuit breaker |
| CN112820593B (en) * | 2021-02-07 | 2023-09-15 | 浙江世隆电气科技有限公司 | Wiring device of circuit breaker |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |