CN113725048A - Circuit breaker large-capacity contact arc extinguishing system capable of eliminating tripping bounce - Google Patents
Circuit breaker large-capacity contact arc extinguishing system capable of eliminating tripping bounce Download PDFInfo
- Publication number
- CN113725048A CN113725048A CN202111097861.2A CN202111097861A CN113725048A CN 113725048 A CN113725048 A CN 113725048A CN 202111097861 A CN202111097861 A CN 202111097861A CN 113725048 A CN113725048 A CN 113725048A
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- arc extinguishing
- arc
- contact
- assembly
- circuit breaker
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- 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
-
- 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
- H01H73/06—Housings; Casings; Bases; Mountings
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention relates to a high-capacity contact arc extinguishing system of a circuit breaker, which can eliminate opening bounce, wherein the number of poles of the arc extinguishing system is 1 pole or multiple stages, and the arc extinguishing system comprises a rear base component, a front base component, an arc extinguishing chamber component and a moving contact component, wherein the rear base component comprises a rear base, a static contact seat and a static arc striking sheet, the top of the rear base is provided with a convex feature extending outwards, the static contact seat is arranged on the rear base, the bottom of the static arc striking sheet is connected to the static contact seat, and the shape of the static arc striking sheet is matched with the shape of the top of the rear base; the front base component comprises a front base and a movable arc striking plate, and the movable arc striking plate is fixed on the upper part of the front base; the top of the arc extinguishing chamber assembly is connected with the top of the rear base assembly and the top of the front base assembly; the moving contact assembly is disposed in a space formed by the rear base assembly and the front base assembly. According to the invention, the convex feature is arranged on the rear base component, so that the space of the arc extinguish chamber is increased, and the capacity arc extinguish chamber can be amplified.
Description
Technical Field
The invention relates to the technical field of low-voltage electric appliances, in particular to a high-capacity contact arc-extinguishing system of a circuit breaker, which can eliminate tripping bounce.
Background
It has been proposed in the low voltage standard of GB/T14048.2-2020 that an AC voltage exceeding 1000V but not exceeding 1500V can also be implemented in accordance with this standard, and a DC voltage of 1500V is also achieved. Therefore, in the current low-voltage industry, the low-voltage circuit breaker is difficult to meet the breaking of high voltage and large current, and particularly the high-voltage arc extinguishing of direct current is more difficult. Therefore, the problem of switching off high voltage and large current needs to be solved.
Disclosure of Invention
In order to solve the technical problem in the prior art, the invention provides a high-capacity contact arc-extinguishing system of a circuit breaker, which can eliminate the tripping bounce.
The invention specifically comprises the following contents: a high-capacity contact arc-extinguishing system of circuit breaker for eliminating the bounce of separating brake, the number of poles of arc-extinguishing system is 1 or more, it includes back base component, front base component, arc-extinguishing chamber component and moving contact component,
the rear base component comprises a rear base, a fixed contact seat and a fixed arc striking sheet, wherein the top of the rear base is provided with a convex feature extending outwards;
the front base component comprises a front base and a movable arc striking plate, and the movable arc striking plate is fixed on the upper part of the front base;
the top of the arc extinguishing chamber assembly is connected with the top of the rear base assembly and the top of the front base assembly;
the movable contact assembly is arranged between the rear base assembly and the front base assembly.
Further, a step is provided at the top end of the raised feature of the rear base assembly, and the top edge of the arc chute assembly is disposed at the step.
Furthermore, the bottom of the protruding feature of the rear base is connected with the upper portion of the static contact seat through a slope, and the static arc striking plate extends to the front wall of the protruding feature from the top end of the static contact seat along the bottom of the protruding feature.
Furthermore, the static arc striking plate is fixed on the rear base assembly through a screw, and comprises a bottom arranged above the static contact seat, an inclined part adaptive to the shape of the slope, a horizontal part adaptive to the bottom wall of the raised feature and a vertical part adaptive to the rear wall of the raised feature.
Furthermore, the front base assembly is provided with a buffer, and the buffer collides with a moving contact base of the moving contact assembly when the breaker is opened.
Furthermore, the top of the front base component is provided with a groove, the movable arc striking piece is arranged in the groove and comprises a vertical part connected with the rear wall of the top of the front base, a middle part connected with the bottom of the groove and an extension part extending from the groove to the inside of the circuit breaker, and the extension part is positioned above the movable arc contact of the movable contact component.
Furthermore, the arc extinguishing chamber assembly is of a symmetrical structure, and the side edges of the arc extinguishing chamber assembly extend outwards respectively and are matched with the tops of the rear base assembly and the front base assembly.
Further, the explosion chamber subassembly includes a plurality of arc extinguishing bars piece, and the positive and negative staggered form of arc extinguishing bars piece is installed on explosion chamber left side board and explosion chamber right side board, and explosion chamber base is connected to explosion chamber left side board and explosion chamber right side board top, sets gradually on the explosion chamber base and goes up arc baffle, explosion chamber back shaft, explosion chamber stainless steel mesh board, explosion chamber roof under the explosion chamber.
Further, the both sides of arc extinguishing bars piece are fixed on explosion chamber left side board and explosion chamber right side board through the riveting mode, and the side of explosion chamber base is equipped with the buckle, passes through the buckle with explosion chamber left side board and is connected.
Furthermore, the tops of the arc-extinguishing grid plates are subjected to insulation treatment, and the distance between the arc-extinguishing grid plates is not less than 2.5 mm.
According to the invention, the convex characteristic is arranged on the rear base component, so that the space of the arc extinguish chamber is increased, the capacity arc extinguish chamber can be swung and amplified, the opening distance requirement between the moving contact and the fixed contact is met, the problem of the disconnection of the heavy current of 1500V alternating current and 2000V direct current can be solved, and the high-voltage arc extinguish chamber has higher use value.
Drawings
The following further explains embodiments of the present invention with reference to the drawings.
FIG. 1 is a schematic diagram 1 of a circuit breaker high capacity contact arc extinguishing system for eliminating tripping bounce;
FIG. 2 is a schematic diagram 2 of a circuit breaker high capacity contact arc extinguishing system for eliminating tripping bounce;
FIG. 3 is a schematic diagram of the arc extinguishing of the present invention;
FIG. 4 is a schematic view of the rear base of the present invention;
FIG. 5 is a schematic view of a front base of the present invention;
fig. 6 is a perspective view of an arc chute assembly of the present invention;
FIG. 7 is a schematic cross-sectional view of an arc chute assembly of the present invention;
fig. 8 is a schematic diagram of an arc chute of the present invention.
Detailed Description
As shown in fig. 1-8, this embodiment discloses a circuit breaker large capacity contact arc extinguishing system for eliminating opening bounce, the number of poles of the contact arc extinguishing system is not limited, and can vary from 1 pole to several poles, and this embodiment is 3 poles, and includes a rear base assembly 1, a front base assembly 2, an arc extinguish chamber assembly 3 and a moving contact assembly 4, wherein:
as shown in fig. 4, the rear base assembly 1 includes a rear base 12, a fixed contact base 5 and a fixed arc tab 6, the top of the rear base 12 is provided with a convex feature extending outward, the fixed contact base 5 is arranged on the rear base 12, the bottom of the fixed arc tab 6 is connected to the fixed contact base 5, and the shape of the fixed arc tab 6 is adapted to the shape of the top of the rear base 12. In this embodiment, the connection mode between the static arc tab 6 and the static contact base 5 is lap contact.
Specifically, the raised feature of the rear base member 1 extends horizontally outward from a position near the top end thereof to form a schematically outward projection as viewed from the side of the rear base member 1. The interior of the raised feature is generally cubic, with a step at its top, at which the top edge of the arc chute assembly 3 is disposed. As shown in fig. 2, the top of the arc chute assembly 3 is flush with the top of the front base assembly 2 and the rear base assembly 1 in the assembled circuit breaker.
Compare circuit breaker among the prior art, the outside extension of the protruding characteristic of rear base subassembly 1 in this embodiment, the space that protruding characteristic extended away is compared in the circuit breaker among the prior art bigger to can install the explosion chamber of bigger capacity, increase explosion chamber capacity solves the switching-on and switching-off arc extinguishing problem of alternating current 1500V, direct current 2000V's heavy current.
In this embodiment, the static arc runner 6 is disposed on the rear base member 1 at a position partially within the raised feature and partially below the raised feature. A slope is arranged between the bottom wall of the raised feature and the upper part of the static contact seat 5 of the rear base component 1, one end of the bottom of the static arc striking plate 6 is arranged above the static contact seat 5, the other end (upper end) of the bottom is connected with the inclined part arranged on the slope, the other end (upper end) of the inclined part is connected with the horizontal part arranged on the bottom wall of the raised feature, and the other end (upper end) of the horizontal part is connected with the vertical part arranged on the rear wall of the raised feature. The structure of the static arc striking plate 6 is matched with that of the rear base assembly 1, the static arc striking plate is fixed on the rear base assembly 1 through a screw 13, and the static arc striking plate can be conveniently replaced by fixing the static arc striking plate through the screw 13 because the arc striking plate is seriously ablated by direct current breaking.
As shown in fig. 5, the front base assembly 2 is provided with a buffer 11, and the buffer 11 collides with the movable contact base 10 of the movable contact assembly 4 when the circuit breaker is opened. The direct current is cut off and is become main contact and easily appear breaking brake back and continue to move to the closing direction, the breaking brake springs promptly, the main loop relighting problem easily appears in the bounce surpassing certain limit, this application every utmost point increases a buffer 11 on preceding base 14, can eliminate the breaking brake spring, promptly eliminate the main loop relighting problem that the too big separating brake spring distance leads to.
The front base assembly 2 comprises a front base 14 and a movable arc-striking piece 8, a groove is formed in the top of the front base assembly, the movable arc-striking piece 8 is arranged in the groove, the movable arc-striking piece 8 comprises a vertical portion connected with the top rear wall of the front base 14, a middle portion connected with the bottom of the groove and an extension portion extending from the groove to the inside of the circuit breaker, and the extension portion is located above a movable arc contact 9 of the movable contact assembly 4. In this embodiment, the cross-section of the groove is trapezoidal, and the bottom end portion of the vertical portion of the movable arc-striking plate 8, the entire middle portion of the vertical portion of the movable arc-striking plate, and the front end of the extending portion are all located in the groove and are respectively in contact with the side wall or the bottom wall of the groove.
The existing movable arc striking plate 8 is generally arranged in the arc extinguishing chamber, and the movable arc striking plate is arranged on the front base assembly 2 and is fixed on the front base assembly 2 through a screw 13, so that the movable arc striking plate can be conveniently replaced through the screw 13. Meanwhile, the movable arc ignition sheet 8 and the static arc ignition sheet 6 are structurally designed to fit the shapes of the front base component 2 and the rear base component 1. Because the opening distance between the movable contact and the fixed contact in the industry is limited, the structure of the movable arc striking plate 6 of the embodiment is arranged, so that when the circuit breaker is switched on, electric arcs between the movable contact and the fixed contact seat 5 can be guaranteed to be absorbed by an arc extinguishing chamber.
As shown in fig. 6-7, the arc chute assembly 3 is of a symmetrical structure, and the side edges of the arc chute assembly 3 extend outward to fit the top of the rear base assembly 1 and the front base assembly 2, i.e., to correspond to the step at the top of the convex feature and the step on the side edge corresponding to each pole at the top of the front and rear base assemblies 1. The arc extinguish chamber is designed into a symmetrical structure, the front and back directions can not be considered during installation, and the installation is convenient.
Arc extinguishing chamber subassembly 3 includes a plurality of arc extinguishing bars piece 7, and the positive and negative staggered form of arc extinguishing bars piece 7 is installed on 16 and the arc extinguishing chamber right side board 15 of arc extinguishing chamber left side board, and arc extinguishing chamber base 17 is connected at 16 and the 15 tops of arc extinguishing chamber right side board of arc extinguishing chamber left side board, sets gradually arc extinguishing chamber lower arc-proof plate 20, arc extinguishing chamber back shaft 19 on the arc extinguishing chamber base 17, arc-proof plate 21 on the arc extinguishing chamber, arc extinguishing chamber back shaft 19, arc extinguishing chamber stainless steel mesh plate 22, arc extinguishing chamber roof 18. Finally, starting from arc chute base 17 by arc chute screws 23, up to arc chute top plate 18 is fixed. The both sides of arc extinguishing bars piece 7 are fixed on explosion chamber left side board 16 and explosion chamber right side board 15 through the riveting mode, and the side of explosion chamber base 17 is equipped with the buckle, passes through the buckle with explosion chamber left side board 16 and is connected.
As shown in fig. 7, the top of the arc-extinguishing grid plates 7 is insulated (dotted frame part in the figure), and the distance between the arc-extinguishing grid plates 7 is not less than 2.5 mm. The number of the arc extinguishing grid pieces 7 is not limited, and the process of insulation treatment is not limited, and the modes comprise plastic spraying, mold manufacturing and insulation covering and the like. The arc extinguishing grid plate 7 is partially sprayed with plastic, so that the arc is prevented from being in a full-combustion arc state, and the arc continues to burn above the arc extinguishing grid plate 7 to cause the failure of the arc extinguishing chamber.
The moving contact component 4 is arranged between the rear base component 1 and the front base component 2 and comprises a moving contact base 10 and a moving arc contact 9, and the moving contact base 10 is connected with the moving arc contact 9.
As shown in fig. 3, which is an arc extinguishing principle of the circuit breaker of this embodiment, when the moving arc contact 9 is separated from the stationary contact base 5 to the opening position as shown in the figure, the arc burns between the contacts at the first in the arcing stage, the arc starts to transfer with the action of the electric power, the arc starts to burn between the stationary arc striking plate 6 and the moving arc striking plate 8 in the transfer stage, the arc starts to burn the arc extinguishing grids 7 in the arcing stage, the arc voltage starts to rise at this time, the current change trend becomes downward, the arc starts to burn most of the arc extinguishing grids 7 in the full arcing stage, the arc voltage sharply rises, the current also sharply falls, and in order to prevent the arc from continuing to move upward, an insulation mode is adopted at the top of the arc extinguishing grids 7 to control the arc to continue to burn between the arc extinguishing grids 7, and finally extinguish the current.
Compared with the prior art, the circuit breaker large capacity contact arc extinguishing system of this embodiment, through set up protruding characteristic on the back base subassembly, increased the explosion chamber space, but the pendulum amplification capacity explosion chamber satisfies the opening distance requirement between the sound contact and the fixed contact simultaneously, can solve the breaking of alternating current 1500V, direct current 2000V's heavy current, has higher use value. The structural design of base subassembly, arc extinguishing chamber subassembly etc. before combining can realize better arc extinguishing effect, improves the stability and the practicality of product.
In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the present invention. The foregoing description is only a preferred embodiment of the invention, which can be embodied in many different forms than described herein, and therefore the invention is not limited to the specific embodiments disclosed above. And that those skilled in the art may, using the methods and techniques disclosed above, make numerous possible variations and modifications to the disclosed embodiments, or modify equivalents thereof, without departing from the scope of the claimed embodiments. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a can eliminate circuit breaker large capacity contact arc extinguishing system of separating brake spring which characterized in that: the number of poles of the arc extinguishing system is 1 pole or multiple stages, and comprises a rear base component, a front base component, an arc extinguishing chamber component and a moving contact component,
the rear base component comprises a rear base, a fixed contact seat and a fixed arc striking sheet, wherein the top of the rear base is provided with a convex feature extending outwards;
the front base component comprises a front base and a movable arc striking plate, and the movable arc striking plate is fixed on the upper part of the front base;
the top of the arc extinguishing chamber assembly is connected with the top of the rear base assembly and the top of the front base assembly;
the movable contact assembly is arranged between the rear base assembly and the front base assembly.
2. The circuit breaker large-capacity contact arc extinguishing system capable of eliminating opening bounce of claim 1, wherein: the top end of the raised feature of the rear base assembly is provided with a step at which the top edge of the arc chute assembly is disposed.
3. The circuit breaker large-capacity contact arc extinguishing system capable of eliminating opening bounce of claim 1, wherein: the bottom of the protruding feature of the rear base is connected with the upper portion of the static contact seat through a slope, and the static arc striking plate extends to the front wall of the protruding feature from the top end of the static contact seat along the bottom of the protruding feature.
4. The circuit breaker large-capacity contact arc extinguishing system capable of eliminating opening bounce of claim 3, wherein: the static arc striking sheet is fixed on the rear base assembly through screws and comprises a bottom arranged above the static contact seat, an inclined part adaptive to the shape of a slope, a horizontal part adaptive to the bottom wall of the raised feature and a vertical part adaptive to the rear wall of the raised feature.
5. The circuit breaker large-capacity contact arc extinguishing system capable of eliminating opening bounce of claim 1, wherein: the front base component is provided with a buffer which collides with a moving contact base of the moving contact component when the breaker is opened.
6. The circuit breaker large-capacity contact arc extinguishing system capable of eliminating opening bounce of claim 1, wherein: the top of the front base component is provided with a groove, the movable arc striking piece is arranged in the groove and comprises a vertical part connected with the rear wall of the top of the front base, a middle part connected with the bottom of the groove and an extension part extending from the groove to the inside of the circuit breaker, and the extension part is positioned above the movable arc contact of the movable contact component.
7. The circuit breaker large-capacity contact arc extinguishing system capable of eliminating opening bounce of claim 1, wherein: the arc extinguishing chamber assembly is of a symmetrical structure, and the side edges of the arc extinguishing chamber assembly extend outwards respectively and are matched with the tops of the rear base assembly and the front base assembly.
8. The circuit breaker large-capacity contact arc extinguishing system capable of eliminating opening bounce of claim 7, wherein: the arc extinguishing chamber subassembly includes a plurality of arc extinguishing bars piece, and the positive and negative staggered form of arc extinguishing bars piece is installed on arc extinguishing chamber left side board and arc extinguishing chamber right side board, and arc extinguishing chamber base is connected to arc extinguishing chamber left side board and arc extinguishing chamber right side board top, sets gradually on the arc extinguishing chamber base under the arc extinguishing chamber flash barrier, arc extinguishing chamber back shaft, the arc extinguishing chamber on flash barrier, arc extinguishing chamber back shaft, arc extinguishing chamber stainless steel mesh board, the arc extinguishing chamber roof.
9. The circuit breaker large-capacity contact arc extinguishing system capable of eliminating opening bounce of claim 7, wherein: the both sides of arc extinguishing bars piece are fixed on explosion chamber left side board and explosion chamber right side board through the riveting mode, and the side of explosion chamber base is equipped with the buckle, passes through the buckle with explosion chamber left side board and is connected.
10. The circuit breaker large-capacity contact arc extinguishing system capable of eliminating opening bounce of claim 7, wherein: the top of the arc-extinguishing grid plates is subjected to insulation treatment, and the distance between the arc-extinguishing grid plates is not less than 2.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111097861.2A CN113725048A (en) | 2021-09-18 | 2021-09-18 | Circuit breaker large-capacity contact arc extinguishing system capable of eliminating tripping bounce |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111097861.2A CN113725048A (en) | 2021-09-18 | 2021-09-18 | Circuit breaker large-capacity contact arc extinguishing system capable of eliminating tripping bounce |
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| Publication Number | Publication Date |
|---|---|
| CN113725048A true CN113725048A (en) | 2021-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111097861.2A Pending CN113725048A (en) | 2021-09-18 | 2021-09-18 | Circuit breaker large-capacity contact arc extinguishing system capable of eliminating tripping bounce |
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| CN (1) | CN113725048A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114743826A (en) * | 2022-04-01 | 2022-07-12 | 江苏大全凯帆开关股份有限公司 | Two-pole direct current load switch |
-
2021
- 2021-09-18 CN CN202111097861.2A patent/CN113725048A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114743826A (en) * | 2022-04-01 | 2022-07-12 | 江苏大全凯帆开关股份有限公司 | Two-pole direct current load switch |
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