CN112951650A - Safety circuit breaker with arc extinguishing system - Google Patents
Safety circuit breaker with arc extinguishing system Download PDFInfo
- Publication number
- CN112951650A CN112951650A CN202110296937.8A CN202110296937A CN112951650A CN 112951650 A CN112951650 A CN 112951650A CN 202110296937 A CN202110296937 A CN 202110296937A CN 112951650 A CN112951650 A CN 112951650A
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- China
- Prior art keywords
- arc
- unit
- circuit breaker
- arc extinguishing
- extinguishing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention relates to a safety circuit breaker with an arc extinguishing system, which is characterized in that: including the circuit breaker body, the circuit breaker body including casing and combined floodgate subassembly, the subassembly that closes a floodgate is equipped with the arc extinguishing structure including movable contact, stationary contact and terminal in the casing, the subassembly that closes a floodgate has movable contact, its characterized in that: the arc extinguishing structure includes the striking unit, is used for carrying out decentralized processing's branch arc unit, right branch arc unit and arc outlet unit branch arc unit's electric arc that the arc introduced of arc unit carries out the arc extinguishing, divides the arc unit to have at least the arc strip arch more than the twice, is formed with between two liang of arc strip archs and divides the arc groove, and the stationary contact is located branch arc groove top department, and the end that divides the arc groove is located arc extinguishing unit adjacent side, the arc outlet unit be located arc extinguishing unit rear side, spout arc export shaping casing down and be located casing lower corner department. The scheme can eliminate the safety risk possibly caused by the ejection of charged particles, ensure the safety risk of the circuit breaker and improve the use safety.
Description
Technical Field
The invention relates to the technical field of circuit breakers, in particular to a safety circuit breaker with an arc extinguishing system.
Background
The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a prescribed time. The circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to the application range, the high-voltage and low-voltage boundary lines are relatively vague, and the circuit breakers above 3kV are generally called high-voltage electric appliances.
The circuit breaker can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power supply circuit, the motor and the like, and automatically cutting off a circuit when faults such as serious overload, short circuit, undervoltage and the like occur, and the function of the circuit breaker is equivalent to the combination of a fuse type switch, an over-under-heat relay and the like. Furthermore, no parts need to be changed after breaking the fault current. At present, it has been widely used.
A circuit breaker generally includes a contact system, an arc extinguishing system, an operating mechanism, a trip unit, a case, and the like. When short circuit occurs, a magnetic field generated by large current (generally 10 to 12 times) overcomes a counterforce spring, a release pulls an operating mechanism to act, and a switch is tripped instantaneously. When the overload occurs, the current becomes large, the heating value becomes large, and the bimetallic strip deforms to a certain degree to push the mechanism to act (the larger the current is, the shorter the acting time is).
The circuit breaker can produce electric arc at the switch-on in-process, and the harm of electric arc is known, and serious can harm people's life, also has on the market to improve more to the circuit breaker for the electric arc that the reply produced, but unreasonable on the arc extinguishing structural design that relates to at present, the arc extinguishing effect is relatively poor.
Disclosure of Invention
The invention provides a safe circuit breaker with an arc extinguishing system, which has a more reasonable structure, can improve the use safety and is more reliable, and solves the problems existing in the use process in the prior art.
The technical scheme of the invention is realized as follows:
safety type circuit breaker with arc extinguishing system its characterized in that: including the circuit breaker body, the circuit breaker body including casing and combined floodgate subassembly, the subassembly that closes a floodgate is equipped with the arc extinguishing structure including movable contact, stationary contact and terminal in the casing, the subassembly that closes a floodgate has movable contact, its characterized in that: the arc extinguishing structure comprises an arc striking unit, an arc dividing unit, an arc extinguishing unit and an arc discharging unit, wherein the arc dividing unit is used for performing dispersion treatment on an electric arc introduced by the arc dividing unit, the arc extinguishing unit is used for extinguishing the electric arc introduced by the arc dividing unit, the arc striking unit, the arc dividing unit, the arc extinguishing unit and the arc discharging unit are sequentially arranged from the right side to the left side, the arc dividing unit is provided with at least more than two arc-shaped strip-shaped bulges, an arc dividing groove is formed between every two arc-shaped strip-shaped bulges, the fixed contact is positioned above the arc dividing groove, the tail end of the arc dividing groove is arranged on the adjacent side of the arc extinguishing unit, the opening of the arc dividing groove in the direction of the arc extinguishing unit is gradually increased and extends to the arc extinguishing unit, the arc discharging unit is positioned on the rear side of the arc extinguishing unit and comprises an upper arc spraying outlet, a middle arc spraying outlet and a lower arc spraying outlet, the upper arc, the lower arc spraying outlet is formed in the shell and is positioned at the lower corner of the shell.
According to the scheme, when the dynamic and static contacts are disconnected, the arc can be rapidly introduced into the multiple arc separating grooves, the arc separating grooves gradually increase and extend to the arc extinguishing unit towards the direction of the arc extinguishing unit, the arc can be rapidly guided to enter the arc extinguishing unit, rapid arc extinguishing is achieved, the arc can be dispersed and discharged out of the arc discharging unit, and the pressure inside the shell is reduced.
Preferably, the arc discharge unit further includes an arc splitter plate installed in the housing and located between the arc extinguishing unit and the arc discharge unit, the arc splitter plate has a guiding section and an arc splitter extension section, the guiding section is located at the rear side of the arc extinguishing unit, the arc splitter extension section faces the lower arc discharge outlet, and the arc flowing out of the arc extinguishing unit is split into an upper arc discharge channel region and a lower arc discharge channel region by the arc splitter plate.
According to the scheme, the arc-dividing plates are additionally arranged, so that the arc is dispersed and guided out, the rear side of the arc-extinguishing unit is not concentrated easily, and the arc is prevented from jumping back into the arc-extinguishing cover.
Preferably, the casing be equipped with the stationary contact mounting groove, the stationary contact mounting groove has the curb plate, is formed with above this curb plate the arc export is spouted to last, and its below is formed with well arc export, and lower arc export is located stationary contact mounting groove below, and lower arc export has side arc export and end arc export, forms four-channel arc export.
According to the scheme, the arc is further dispersed and discharged through the reasonable layout design of the arc spraying outlets.
Preferably, the arc dividing groove is provided with seven channels.
According to the scheme, the seven arc-dividing grooves are arranged to correspond to the arc-extinguishing units, arcs generated during breaking can be separated in a dispersing mode and uniformly enter the arc-extinguishing cover, and the problem that the arcs are concentrated at one position to burn out the arc-extinguishing units and the pressure is increased is solved.
Preferably, the arc extinguishing chamber is provided with a plurality of grid pieces which are led out, an introducing port is formed between every two grid pieces, and an opening of the arc dividing groove facing to the direction of the arc extinguishing unit is communicated with the introducing port of the grid pieces.
According to the scheme, the arc extinguishing device is designed in a corresponding communication mode, so that arc extinguishing can be rapidly processed along a specified channel conveniently.
Preferably, the arc striking unit comprises an arc striking plate, and the arc striking plate is close to the movable contact.
According to the scheme, the arc striking plate is pressed close to the movable contact, namely, the movable contact is arranged in a rising mode, the arc striking capacity is improved, and electric arcs enter the arc extinguishing unit along the arc striking plate.
Preferably, the grid plates of the arc extinguishing chambers are arranged into eleven arc extinguishing channels.
According to the scheme, the eleven grid pieces are arranged, so that the arc can be dispersed and absorbed, and the pressure inside the arc extinguishing unit is reduced.
In summary, compared with the prior art, the invention has the beneficial effects that:
the reasonable design of arc extinguishing structure of this scheme has carried out electric arc dispersion treatment, reduces inside pressure, also can prevent the charged particle in the circuit breaker casing through spouting the arc mouth blowout, eliminates the safety risk that charged particle blowout probably causes, thereby guarantees the safe operation of circuit breaker and improves the safety in utilization of circuit breaker.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of the overall structure of a safety circuit breaker with an arc extinguishing system.
Fig. 2 is a schematic diagram of the overall structure of a safety circuit breaker with an arc extinguishing system.
Fig. 3 is a schematic diagram of the overall structure of a safety type circuit breaker with an arc extinguishing system.
Fig. 4 is a partially enlarged schematic view of fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 4 in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
As shown in fig. 1 to 4, the invention discloses a safety circuit breaker with an arc extinguishing system, which comprises a circuit breaker body, wherein the circuit breaker body comprises a shell 1, a closing assembly and an overload protection mechanism, the closing assembly comprises a movable contact 11, a stationary contact 8 and a wiring terminal 6, an arc extinguishing structure is arranged in the shell 1, the arc extinguishing structure comprises an arc striking unit 2, an arc dividing unit 3 for dispersing electric arcs introduced by the arc dividing unit, an arc extinguishing unit 4 for extinguishing the electric arcs introduced by the arc dividing unit and an arc discharging unit, the arc striking unit 2, the arc dividing unit 3, the arc extinguishing unit 4 and the arc discharging unit are sequentially arranged from right to left, the arc dividing unit is provided with at least two arc-shaped strip-shaped bulges 3-2, an arc dividing groove 3-1 is formed between every two arc-shaped strip-shaped bulges 3-2, the stationary contact 8 is positioned above the arc dividing groove 3-1, divide the end 3-3 of arc groove to locate 4 adjacent sides of arc extinguishing unit, divide the arc groove to increase gradually and extend to towards the direction opening of arc extinguishing unit the arc extinguishing unit can introduce the arc into the arc extinguishing unit fast through this structure, the arc unit that goes out be located arc extinguishing unit rear side, the arc unit that goes out includes spout arc export 15, well spout arc export 14 and spout the arc export down, goes up spout arc export 15, well spout arc export 14 and all take shape in 1 inside and intercommunication of casing stationary contact 6 spouts arc export shaping casing down and is located casing lower corner department. In the above, the arc striking unit includes an arc striking plate, and the arc striking plate is close to the movable contact 11.
The shell is provided with a fixed contact mounting groove 7, the fixed contact mounting groove 7 is provided with a side plate 16, the upper arc spraying outlet 15 is formed above the side plate, a middle arc spraying outlet 14 is formed below the side plate, the lower arc spraying outlet is positioned below the fixed contact mounting groove, and the lower arc spraying outlet is provided with a side arc spraying outlet 13 and a bottom arc spraying outlet 12 to form a four-channel arc spraying outlet. The design of the four-channel arc spraying outlet can reduce the internal pressure, improve the safety and prevent safety accidents.
The arc discharge unit further comprises an arc distribution plate 5 which is arranged in the shell 1, the scheme can adopt integral injection molding, but is not limited to and is positioned between the arc extinguishing unit 4 and the arc discharge unit, the arc distribution plate is provided with a guide section 5-1 and an arc distribution extension section 5-2, the guide section 5-1 is positioned at the rear side of the arc extinguishing unit, the arc distribution extension section faces the direction of the lower arc spraying outlet, and the arc flowing out of the arc extinguishing unit is dispersed into an upper arc discharge channel area 9 and a lower arc discharge channel area 10 through the arc distribution plate. The arc splitter plate 5 can effectively disperse the electric arc and rapidly guide the electric arc to the outside of the arc outlet unit.
Referring to fig. 4, the arc extinguishing chamber has a plurality of grid pieces 4-1, the grid pieces are ten pieces to form ten arc extinguishing channels, an introducing port 4-2 is formed between every two grid pieces, and the opening of the arc dividing groove facing the direction of the arc extinguishing unit is communicated with the introducing ports of the grid pieces. The purpose is to separate the generated arc.
The product of the scheme can quickly extinguish electric arcs generated when the movable contact and the static contact are separated, and adsorb charged particles; the safety risk that the charged particle blowout may cause is eliminated, and the safety risk of the circuit breaker is guaranteed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. Safety type circuit breaker with arc extinguishing system its characterized in that: including the circuit breaker body, the circuit breaker body including casing and combined floodgate subassembly, the subassembly that closes a floodgate is equipped with the arc extinguishing structure including movable contact, stationary contact and terminal in the casing, the subassembly that closes a floodgate has movable contact, its characterized in that: the arc extinguishing structure comprises an arc striking unit, an arc dividing unit, an arc extinguishing unit and an arc discharging unit, wherein the arc dividing unit is used for performing dispersion treatment on an electric arc introduced by the arc dividing unit, the arc extinguishing unit is used for extinguishing the electric arc introduced by the arc dividing unit, the arc striking unit, the arc dividing unit, the arc extinguishing unit and the arc discharging unit are sequentially arranged from the right side to the left side, the arc dividing unit is provided with at least more than two arc-shaped strip-shaped bulges, an arc dividing groove is formed between every two arc-shaped strip-shaped bulges, the fixed contact is positioned above the arc dividing groove, the tail end of the arc dividing groove is arranged on the adjacent side of the arc extinguishing unit, the opening of the arc dividing groove in the direction of the arc extinguishing unit is gradually increased and extends to the arc extinguishing unit, the arc discharging unit is positioned on the rear side of the arc extinguishing unit and comprises an upper arc spraying outlet, a middle arc spraying outlet and a lower arc spraying outlet, the upper arc, the lower arc spraying outlet is formed in the shell and is positioned at the lower corner of the shell.
2. The safety circuit breaker with an arc extinguishing system according to claim 1, characterized in that: the arc discharge unit further comprises an arc distribution plate, the arc distribution plate is installed in the shell and located between the arc extinguishing unit and the arc discharge unit, the arc distribution plate is provided with a guiding section and an arc distribution extending section, the guiding section is located on the rear side of the arc extinguishing unit, the arc distribution extending section faces the lower arc spraying outlet direction, and the arc flowing out of the arc extinguishing unit is dispersed into an upper arc discharge channel area and a lower arc discharge channel area through the arc distribution plate.
3. Safety circuit breaker with arc extinguishing system according to claim 1 or 2, characterized in that: the casing be equipped with the stationary contact mounting groove, the stationary contact mounting groove has the curb plate, is formed with above this curb plate the arc export is spouted to last, and its below is formed with well arc export, spouts the arc export down and is located stationary contact mounting groove below, spout the arc export down and have the side and spout the arc export at the bottom, form the four-channel and spout the arc export.
4. The safety circuit breaker with an arc extinguishing system according to claim 1, characterized in that: the arc dividing groove is provided with seven channels.
5. Safety circuit breaker with arc extinguishing system according to claim 1 or 4, characterized in that: the arc extinguishing chamber is provided with a plurality of leading-out grid pieces, a leading-in port is formed between every two grid pieces, and an opening of the arc dividing groove facing the direction of the arc extinguishing unit is communicated with the leading-in ports of the grid pieces.
6. The safety circuit breaker with an arc extinguishing system of claim 4, wherein: the arc striking unit comprises an arc striking plate, and the arc striking plate is close to the movable contact.
7. The safety circuit breaker with an arc extinguishing system of claim 5, wherein: ten grid pieces of the arc extinguishing chamber are arranged to form ten arc extinguishing channels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110296937.8A CN112951650A (en) | 2021-03-19 | 2021-03-19 | Safety circuit breaker with arc extinguishing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110296937.8A CN112951650A (en) | 2021-03-19 | 2021-03-19 | Safety circuit breaker with arc extinguishing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112951650A true CN112951650A (en) | 2021-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110296937.8A Pending CN112951650A (en) | 2021-03-19 | 2021-03-19 | Safety circuit breaker with arc extinguishing system |
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| Country | Link |
|---|---|
| CN (1) | CN112951650A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113889383A (en) * | 2021-08-31 | 2022-01-04 | 浙江渤创电力科技有限公司 | Circuit breaker |
-
2021
- 2021-03-19 CN CN202110296937.8A patent/CN112951650A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113889383A (en) * | 2021-08-31 | 2022-01-04 | 浙江渤创电力科技有限公司 | Circuit breaker |
| CN113889383B (en) * | 2021-08-31 | 2023-09-05 | 浙江渤创电力科技有限公司 | Circuit breaker |
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