CN202443933U - Direct current circuit breaker with permanent magnet arc blowing system - Google Patents
Direct current circuit breaker with permanent magnet arc blowing system Download PDFInfo
- Publication number
- CN202443933U CN202443933U CN2012200665942U CN201220066594U CN202443933U CN 202443933 U CN202443933 U CN 202443933U CN 2012200665942 U CN2012200665942 U CN 2012200665942U CN 201220066594 U CN201220066594 U CN 201220066594U CN 202443933 U CN202443933 U CN 202443933U
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- arc
- permanent magnet
- circuit breaker
- permanent
- contact
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Abstract
The utility model relates to the technical field of a circuit breaker and particularly relates to a direct current circuit breaker with a permanent magnet arc blowing system. The direct current circuit breaker with the permanent magnet arc blowing system structurally comprises a shell formed by buckling a bottom shell and a cover shell, a contact system, a wiring terminal, an overload protection releaser, a short-circuit protection releaser, an arc extinguishing system and the permanent magnet arc blowing system, wherein the permanent magnet arc blowing system comprises two permanent magnets which are respectively mounted on the bottom shell and the cover shell; the two permanent magnets are located at two sides of a static contact and the two permanent magnets are arranged in a shoe-shaped structure; each permanent magnet comprises a shoe cylinder part in a movable and static contact disjunction region and a shoe body part which is in circular-arc transition connection with the shoe cylinder part; the shoe body part is arranged towards an arc extinguishing cover; the bottom face of the shoe body part is arranged to be far away from a circular-arc face of the top face of the shoe body part along the direction which is close to one end of the arc extinguishing cover. Compared with the prior art, a permanent magnet structure is provided with a path suitable for electric arc movement, an electric arc can be rapidly blown away a contact region and the reliability of the circuit breaker is improved.
Description
Technical field
The utility model relates to breaker technical field, is specifically related to a kind of dc circuit breaker, particularly relates to a kind of dc circuit breaker with permanent magnetism arc blow-out system.
Background technology
Dc circuit breaker is widely used in the direct current network, and it can guarantee being connected and disconnection under various rated current, voltage and load usually.Any abnormal failure (for example overload or short circuit) is arranged in circuit, thereby, can make the complete and isolated from power of load like this through moving contact and fixed contact are broken off protected circuit.
Traditional dc circuit breaker, its primary structure is: include operating mechanism, overload protection release, short-circuit protection release, contact system, arc quenching system, binding post, guide rail card and plastic casing; The overload protection release of dc circuit breaker is made up of thrermostatic bimetal-plate, and when having served as the live stream, the bimetal leaf heated bending promotes the dropout part, makes circuit breaker tripping; When the load current of short-circuit protection circuit is less than or equal to rated current, flow through the counter-force of the electromagnetic attraction that electric current produced of coil less than spring, then iron core is motionless in position, normal operation of circuit breaker; When circuit breaker institute protection circuit produced short circuit current, the electromagnetic attraction that electric current produced that flows through coil was greater than spring reverse elasticity power, and then circuit breaker separating brake at short notice, disengagement failure circuit are moved in iron core moment suction; Arc quenching system comprises arc control device and is located at the arc extinguishing grid pieces in the arc control device that in the electric arc that produces between the dynamic/static contact entering arc control device, in arc control device, electric arc is cut apart by arc extinguishing grid pieces, and extinguishes.For impelling electric arc to get in the arc control device; Disjunction zone at moving contact and fixed contact is provided with the arc blow-out system; This arc blow-out system constitutes (permanent magnetism arc blow-out system) by being separately positioned on the drain pan that constitutes plastic casing and two permanent magnets that cover on the shell; The action of a magnetic field that the electric arc that between dynamic/static contact, produces is produced by two permanent magnets, and leave contact disjunction zone fast, get in the arc control device.
But; Short when the electric arc between the dynamic and static contact produces, elongate while moving, electric arc runway plane section is similar to boot last; And electric arc longitudinal length near arc control device the time is big; Two permanent magnet shape and structure different designs close the arc motion rule in the arc blow-out system of traditional dc circuit breaker, and electric arc can not get in the arc control device fast, cause the unfavorable defective of arc quenching effect; In addition, two permanent magnets are directly exposed in the electric arc, and electric arc has very high temperature usually, and the magnetic energy of permanent magnet can raise with temperature and two descends fast, causes the permanent magnet life-span to be reduced, and reduces the reliability of circuit breaker.
Summary of the invention
To the deficiency that prior art exists, the purpose of the utility model is to provide a kind of permanent magnet to adopt appropriate design structure and installation site, and electric arc can get in the arc control device fast, the dc circuit breaker of the band magnetic blowout system that arc quenching effect is good.
For realizing above-mentioned purpose; The utility model provides following technical scheme: a kind of dc circuit breaker with permanent magnetism arc blow-out system comprises by drain pan and lid shell fastening the shell that constitutes and being located at contact system, binding post, overload protection release, short-circuit protection release, arc quenching system and the permanent magnetism arc blow-out system in the shell; Said contact system includes moving contact and fixed contact; Said arc quenching system includes arc-extinguish chamber and is located at the arc extinguishing grid pieces in the arc-extinguish chamber; Dynamic and static contact is connected with arc-extinguish chamber through the striking sheet; Said permanent magnetism arc blow-out system includes two permanent magnets that are installed on respectively on drain pan and the lid shell; Two permanent magnets are positioned at the fixed contact both sides, it is characterized in that: described two permanent magnets become the setting of boots shape structure, and permanent magnet comprises the leg of a boot portion that is positioned at dynamic and static contact disjunction zone and the boots body that is connected with leg of a boot portion arc transition; The boots body is towards the arc-extinguish chamber setting, and the bottom surface of boots body is along being the arc surface setting away from boots body end face near arc-extinguish chamber one extreme direction.
Simultaneously, the magnetic pole of a side is identical in opposite directions for described two permanent magnets.
Through adopting technique scheme; The permanent magnet that is positioned at the contact both sides adopts the boots body of boots shape structure setting and permanent magnet to be provided with towards arc-extinguish chamber (arc control device); Meet electric arc and get into the motion path in the arc control device, make the magnetic line of force that is full of on the arc motion path perpendicular to electric arc; Leg of a boot portion is connected with boots body arc transition, guarantees not distort in the magnetic field of two permanent magnets generation, and the magnetic field of generation is stable; Simultaneously; The bottom surface of boots body is along being the arc surface setting away from boots body end face near arc-extinguish chamber one extreme direction; Guaranteed that two permanent magnets are big at the magnetic field longitudinal length that produces near arc-extinguish chamber one end, when the magnetic line of force is covered with electric arc and leans on arc control device into vertical mouthful is convenient to blow off dynamic/static contact disjunction place and getting in the arc control device fast of electric arc is extinguished; The protection dynamic/static contact is guaranteed the circuit breaker reliable breaking not by arc erosion.
The utility model further is set to: be coated with the flash barrier with permanent magnet and electric arc isolation on described two permanent magnets, flash barrier adopts heat-barrier material to process.
Simultaneously, described heat-barrier material is a pottery.
Through adopting technique scheme, the preventing arc cover plate is isolated permanent magnet and electric arc, effectively protects permanent magnet to avoid high arc temperature and corrodes, and prolongs permanent magnet useful life, guarantees that permanent magnet produces stabilizing magnetic field, the raising breaker reliability; The flash barrier good heat-insulation effect that ceramic material is processed.
The utility model further is set to: described flash barrier is provided with the containing cavity that supplies the adaptive installation of said permanent magnet away from a side of fixed contact, and permanent magnet is flush-mounted in the containing cavity.
Through adopting technique scheme, permanent magnet is installed convenient and reliable is set, and flash barrier forms effective covering protection to permanent magnet.
This practicality newly further is set to: the boots body bottom surface of described permanent magnet is provided with semicircle gap, and the flash barrier correspondence position is provided with location hole, and drain pan is provided with the reference column that constitutes in the adaptive insertion location hole the permanent magnet location with the lid shell.
Through adopting technique scheme, the permanent magnet location and installation is reliable, prevents effectively that further permanent magnet is subjected to displacement.
Below in conjunction with accompanying drawing the utility model is further described.
Description of drawings
Fig. 1 is the internal structure sketch map of the utility model specific embodiment;
Fig. 2 is the partial structurtes sketch map of the utility model specific embodiment;
Fig. 3 is the cutaway view of the utility model specific embodiment;
Fig. 4 is permanent magnet and a flash barrier assembly structure sketch map in the utility model specific embodiment;
Fig. 5 is the structural representation of permanent magnet in the utility model specific embodiment.
Embodiment
Extremely shown in Figure 5 like Fig. 1; The disclosed a kind of dc circuit breaker with permanent magnetism arc blow-out system of the utility model comprises by drain pan 1 and lid shell 2 fastening the shell that constitutes and being located at contact system, binding post, overload protection release, short-circuit protection release, arc quenching system and the permanent magnetism arc blow-out system in the shell; Arc quenching system comprises arc-extinguish chamber 3 and is located at the arc extinguishing grid pieces 30 in the arc-extinguish chamber 3, and contact system comprises fixed contact 4 and moving contact 40, and dynamic and static contact 4,40 links to each other with arc-extinguish chamber 3 through the striking sheet; Permanent magnetism arc blow-out system is located at dynamic and static contact 4,40 disjunctions zone, is used for dynamic and static contact 4, the electric arc that produces between 40 are blown into (in the arc control device) in the arc-extinguish chamber 3, and electric arc gets into to be cut apart by arc extinguishing grid pieces 30 in the arc control device and extinguish.
The dc circuit breaker of the utility model; The annexation of shell, contact system, binding post, overload protection release, short-circuit protection release and arc quenching system and the technology that operation principle is well known to those skilled in the art; Therefore; For ease of the improvement of outstanding the utility model, omit detailed description to said system.
Described permanent magnetism arc blow-out system includes and is installed on drain pan 1 respectively and is located at fixed contact 4 both sides with 6, two permanent magnets 6 of two permanent magnets on the lid shell 2; Two permanent magnets 6 are relative polar orientation setting; Promptly as shown in Figure 2; The N utmost point of being located at the permanent magnet on the drain pan is with to be located at the N that cover permanent magnet on the shell extremely relative, but the pole orientation of two permanent magnets determines that according to the sense of current existing circuit breaker electric current flows to moving contact from fixed contact; If the sense of current changes, the corresponding variation takes place in the magnetic pole of then corresponding two permanent magnets 6.The magnetic field that is produced by two permanent magnets 6 is electric arc dynamic and static contact 4, the 40 disjunctions zone of blowing off, and gets in the arc-extinguish chamber 3 and extinguishes.
General electric arc gets into before the arc control device in a flash from producing in circuit breaker: short when electric arc produces, elongate while moving, and the plane section in arc motion path is similar to boot last, and long at the vertical mouth near arc-extinguish chamber 3 place's electric arcs; Therefore; For further making magnetic field meet the Arc Motion path; Accelerate the blow off disjunction zone of dynamic and static contact 4,40 of electric arc; Impel electric arc to get in the arc control device fast and extinguish, described two permanent magnets 6 are the setting of boots shape structure, and permanent magnet 6 comprises the leg of a boot portion 61 that is positioned at dynamic and static contact 4,40 disjunction zones and the boots body 62 that is connected with leg of a boot portion 61 arc transition; Boots body 62 is provided with towards arc-extinguish chamber 3, and the bottom surface 620 of boots body 62 is along being the arc surface setting away from boots body end face 621 near arc-extinguish chamber 3 one extreme directions.The permanent magnet 6 of boot last structure produces boot last magnetic field, and the Arc Motion path is full of boot last magnetic field; Leg of a boot portion 61 on the permanent magnet 6 and boots body adopt arc transition to be connected, and magnetic line of force distortion causes the magnetic field instability when avoiding right angle etc. to connect; And the bottom surface 620 of boots body 62 is covered with vertical mouthful of electric arc along being the arc surface setting away from boots body end face 621 near arc-extinguish chamber 3 one extreme directions at the magnetic line of force that produces near arc-extinguish chamber 3 one ends two permanent magnets 6; Like this can be apace with the electric arc contact disjunction zone of blowing off, carry out arc extinguishing in the arc-extinguish chamber 3 of going forward side by side, this arc blow-out system arc blow-out is effective, the circuit breaker reliable breaking.
Destroy for further protecting permanent magnet 6 to avoid arc erosion, be coated with the flash barrier 5 that permanent magnet 6 and electric arc are isolated on described two permanent magnets 6, flash barrier 5 adopts heat-barrier material to process, and flash barrier 5 employing potteries are processed in this enforcement.Said flash barrier 5 side of fixed contact 4 dorsad is provided with the containing cavity 51 that supplies said permanent magnet 6 adaptive installations, and permanent magnet 6 is flush-mounted in the containing cavity 51.On flash barrier 5, be provided with the connection location hole, the corresponding position is provided with joint pin on corresponding drain pan 1 and the lid shell 2, and flash barrier 5 is connected through joint pin on connecting location hole and drain pan 1 and covering shell 2.For further making permanent magnet 6 location and installation reliable; The bottom surface 620 of described permanent magnet 6 is provided with semicircle gap 6200; Flash barrier 5 correspondence positions are provided with location hole 50, and drain pan 1 is provided with the reference column 10 that constitutes in the adaptive insertion location hole 50 permanent magnet 6 location with lid shell 2; Location hole 50 plays the effect that flash barrier 5 is installed accordingly with reference column 10, and the circular gap 6200 on the permanent magnet 6 plays the imitated effect that prevents simultaneously.
Claims (8)
1. the dc circuit breaker with permanent magnetism arc blow-out system comprises by drain pan and lid shell fastening the shell that constitutes and being located at contact system, binding post, overload protection release, short-circuit protection release, arc quenching system and the permanent magnetism arc blow-out system in the shell; Said contact system includes moving contact and fixed contact; Said arc quenching system includes arc-extinguish chamber and is located at the arc extinguishing grid pieces in the arc-extinguish chamber; Dynamic and static contact is connected with arc-extinguish chamber through the striking sheet; Said permanent magnetism arc blow-out system includes two permanent magnets that are installed on respectively on drain pan and the lid shell; Two permanent magnets are positioned at the fixed contact both sides, it is characterized in that: described two permanent magnets become the setting of boots shape structure, and permanent magnet comprises the leg of a boot portion that is positioned at dynamic and static contact disjunction zone and the boots body that is connected with leg of a boot portion arc transition; The boots body is towards the arc-extinguish chamber setting, and the bottom surface of boots body is along being the arc surface setting away from boots body end face near arc-extinguish chamber one extreme direction.
2. the dc circuit breaker of band permanent magnetism arc blow-out according to claim 1 system is characterized in that: described two permanent magnets magnetic pole of a side in opposite directions are identical.
3. the dc circuit breaker of band permanent magnetism arc blow-out according to claim 1 and 2 system is characterized in that: be coated with the flash barrier that permanent magnet and electric arc are isolated on described two permanent magnets, flash barrier adopts heat-barrier material to process.
4. the dc circuit breaker of band permanent magnetism arc blow-out according to claim 3 system is characterized in that: described flash barrier is provided with the containing cavity that supplies the adaptive installation of said permanent magnet away from a side of fixed contact, and permanent magnet is flush-mounted in the containing cavity.
5. the dc circuit breaker of band permanent magnetism arc blow-out according to claim 3 system; It is characterized in that: the boots body bottom surface of described permanent magnet is provided with semicircle gap; The flash barrier correspondence position is provided with location hole, and drain pan is provided with the reference column that constitutes in the adaptive insertion location hole the permanent magnet location with the lid shell.
6. the dc circuit breaker of band permanent magnetism arc blow-out according to claim 4 system; It is characterized in that: the boots body bottom surface of described permanent magnet is provided with semicircle gap; The flash barrier correspondence position is provided with location hole, and drain pan is provided with the reference column that constitutes in the adaptive insertion location hole the permanent magnet location with the lid shell.
7. the dc circuit breaker of band permanent magnetism arc blow-out according to claim 3 system is characterized in that: described heat-barrier material is pottery.
8. according to the dc circuit breaker of claim 4 or 5 or 6 described band permanent magnetism arc blow-out systems, it is characterized in that: described heat-barrier material is pottery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200665942U CN202443933U (en) | 2012-02-27 | 2012-02-27 | Direct current circuit breaker with permanent magnet arc blowing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200665942U CN202443933U (en) | 2012-02-27 | 2012-02-27 | Direct current circuit breaker with permanent magnet arc blowing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202443933U true CN202443933U (en) | 2012-09-19 |
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ID=46825368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200665942U Expired - Lifetime CN202443933U (en) | 2012-02-27 | 2012-02-27 | Direct current circuit breaker with permanent magnet arc blowing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202443933U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103985578A (en) * | 2013-02-13 | 2014-08-13 | 欧姆龙株式会社 | Switching device |
| CN106104742A (en) * | 2014-03-31 | 2016-11-09 | 松下知识产权经营株式会社 | Chopper |
| CZ307157B6 (en) * | 2017-03-21 | 2018-02-07 | Hess R&D, S.R.O. | A current circuit breaker |
| CN109148236A (en) * | 2018-09-17 | 2019-01-04 | 美高电气科技有限公司 | A kind of breaker |
| CN109192632A (en) * | 2018-11-06 | 2019-01-11 | 江苏凯隆电器有限公司 | A kind of small-sized DC breaker arc extinguishing structure |
| CN109192570A (en) * | 2018-11-06 | 2019-01-11 | 江苏凯隆电器有限公司 | A kind of direct current PC grades of twin-power switch arc extinguishing structures |
-
2012
- 2012-02-27 CN CN2012200665942U patent/CN202443933U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103985578A (en) * | 2013-02-13 | 2014-08-13 | 欧姆龙株式会社 | Switching device |
| CN106104742A (en) * | 2014-03-31 | 2016-11-09 | 松下知识产权经营株式会社 | Chopper |
| CN106104742B (en) * | 2014-03-31 | 2018-06-19 | 松下知识产权经营株式会社 | Breaker |
| CZ307157B6 (en) * | 2017-03-21 | 2018-02-07 | Hess R&D, S.R.O. | A current circuit breaker |
| CN109148236A (en) * | 2018-09-17 | 2019-01-04 | 美高电气科技有限公司 | A kind of breaker |
| CN109192632A (en) * | 2018-11-06 | 2019-01-11 | 江苏凯隆电器有限公司 | A kind of small-sized DC breaker arc extinguishing structure |
| CN109192570A (en) * | 2018-11-06 | 2019-01-11 | 江苏凯隆电器有限公司 | A kind of direct current PC grades of twin-power switch arc extinguishing structures |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120919 |