CN112017923B - Arc extinguish chamber of circuit breaker - Google Patents
Arc extinguish chamber of circuit breaker Download PDFInfo
- Publication number
- CN112017923B CN112017923B CN202010017378.8A CN202010017378A CN112017923B CN 112017923 B CN112017923 B CN 112017923B CN 202010017378 A CN202010017378 A CN 202010017378A CN 112017923 B CN112017923 B CN 112017923B
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- arc
- extinguishing
- arc extinguishing
- lengthened
- chamber
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- 238000005452 bending Methods 0.000 claims abstract description 3
- 230000001154 acute effect Effects 0.000 claims description 9
- 238000010891 electric arc Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 230000008033 biological extinction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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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
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses an arc extinguish chamber of a circuit breaker, which comprises at least ten general arc extinguishing sheets, wherein the general arc extinguishing sheets are sequentially arranged and fixed in an insulating state, at least one first lengthened arc extinguishing sheet and at least one second lengthened arc extinguishing sheet are arranged between one side and the middle part of the arc extinguish chamber, one ends of the first lengthened arc extinguishing sheet and the second lengthened arc extinguishing sheet extend out in the direction close to a contact system and are longer than the general arc extinguishing sheets, and one end of the first lengthened arc extinguishing sheet is provided with a bending structure; the first lengthened arc-extinguishing piece and the second lengthened arc-extinguishing piece are respectively provided with a first open slot and a second open slot towards the middle part of one end, which is close to the contact system, of the extending end, and the opening areas of the bottoms of the first open slot and the second open slot are respectively larger than the opening areas of the front parts of the first open slot and the second open slot.
Description
Technical Field
The invention belongs to the technical field of low-voltage electrical appliances, and particularly relates to an arc extinguish chamber of a circuit breaker, which is suitable for a direct current and alternating current power supply system.
Background
The low-voltage circuit breaker mainly comprises a controller, a contact system, an arc extinguish chamber, an operating mechanism and the like, wherein the arc extinguish chamber is a very important functional component of the low-voltage circuit breaker, and the high-low pair of the performance of the arc extinguish chamber is related to the electrical service life and the breaking capacity of the circuit breaker. As shown in fig. 1, an arc extinguishing chamber of a conventional circuit breaker is provided, in which a magnetic field generated by a conductive loop of a contact and an air blast generated by an expansion gas during breaking are used to drive an arc to enter the arc extinguishing chamber, and a long arc is cut into a plurality of short arcs through a grid plate, so that an arc voltage is increased, and arc extinction is realized.
In recent years, with the rapid development of new energy, dc power systems have been developed. The conventional frame circuit breaker is mainly applied to an alternating current power system, and the frame circuit breaker of a direct current power system is few. Because a direct current system does not have a natural zero crossing phenomenon relative to an alternating current system, an electric arc cannot be extinguished at the moment of zero crossing of alternating current like alternating current, the electric arc must be rapidly elongated, cut and cooled, so that the electric arc voltage exceeds the power supply voltage, and the electric arc can be extinguished.
Disclosure of Invention
In summary, the invention aims to solve the technical problem that an arc is difficult to enter an arc extinguish chamber in the existing frame circuit breaker under a direct current working environment, and provides the arc extinguish chamber of the circuit breaker, wherein the arc is driven to quickly and effectively enter the arc extinguish chamber through the improvement of the structures and arrangement modes of arc extinguish grid pieces and arc striking pieces of the arc extinguish chamber of the circuit breaker, the arc is cut into a plurality of short arcs, the arc voltage is effectively increased, and the purpose of direct current arc extinction is achieved.
The technical scheme provided by the invention is as follows:
the utility model provides a circuit breaker explosion chamber, the explosion chamber includes ten at least general arc extinguishing pieces, general arc extinguishing piece is arranged in proper order and is fixed with insulating form, between one side to the middle part of explosion chamber, is equipped with the first extension arc extinguishing piece of an at least slice and an at least second extension arc extinguishing piece, first extension arc extinguishing piece with the one end of second extension arc extinguishing piece stretches out and is good at to the direction that is close to contact system general arc extinguishing piece, wherein the one end of first extension arc extinguishing piece is equipped with bending structure, first extension arc extinguishing piece with second extension arc extinguishing piece is close to contact system's middle part is provided with a first open slot and second open slot respectively, first open slot and second open slot include bottom and front portion respectively, first open slot with the open area of the bottom of second open slot is greater than respectively first open slot with the anterior open area of second open slot.
Preferably, the first elongated arc plates extend a greater length closer to the contact system than the second elongated arc plates.
Preferably, the portions of the first and second elongated arc plates extending in the direction close to the contact system form an acute angle.
Preferably, one side of the arc extinguishing chamber is provided with a first arc striking plate extending towards the contact system.
Preferably, one end of the first arc striking piece, which extends towards the contact system, forms a certain acute angle with the general arc extinguishing piece.
Preferably, a third opening groove is arranged in the middle of the forward extending part of the first arc striking piece, and the bottom opening area of the third opening groove is larger than the front part of the third opening groove.
Preferably, a second arc striking plate extending to be close to the contact system is arranged on the other side of the arc extinguishing chamber.
Preferably, the number of the second arc ignition pieces is one or a plurality of pieces in a superposition manner.
Preferably, one end of the second arc striking plate extends towards the contact system and forms a certain acute angle with the general arc extinguishing plate.
Preferably, the universal arc extinguishing plates are arranged in an insulating shell.
The invention has the following beneficial effects:
1) The structure and the arrangement of the first lengthened arc extinguishing piece and the second lengthened arc extinguishing piece can enable direct-current electric arc to be rapidly and effectively driven into the arc extinguishing chamber through narrow slits of open slots in the lengthened arc extinguishing pieces, so that the arc extinguishing pieces are cut into multiple sections of small short arcs.
2) The structure and the arrangement of the first and second arc striking sheets can enable the arc feet of the direct-current arc to move towards the arc extinguish chamber smoothly, and favorable conditions are provided for cutting the arc by the arc extinguishing sheets.
3) By the measures, the arc is cut into small short arcs, so that the arc voltage is improved, and when the arc voltage is greater than the power supply voltage, the arc is extinguished.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic view of a prior art arc chute.
Fig. 2 is a schematic view of the arc chute structure of the present invention.
Figure 3 is a schematic view of the first elongated arc extinguishing plate structure of the arc extinguishing chamber of the present invention.
Figure 4 is a schematic view of a second elongated arc extinguishing plate structure of the arc extinguishing chamber of the present invention.
Fig. 5 is a schematic structural view of a first arc runner of the arc extinguishing chamber of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings 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 of the 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.
The following description of terms of orientation such as "up" and "down" is made with reference to the angle shown in FIG. 2.
Referring to fig. 2 to 5, the present invention provides an arc extinguish chamber 100 of a circuit breaker, wherein the arc extinguish chamber 100 is disposed above a contact system of the circuit breaker, the contact system includes a moving contact and a stationary contact, the arc extinguish chamber 100 includes an insulating housing 200, a plurality of general arc extinguishing plates 110, a first elongated arc extinguishing plate 120, a second elongated arc extinguishing plate 130, a first arc striking plate 140, and a second arc striking plate 150, the plurality of general arc extinguishing plates 110 are sequentially installed on the insulating housing 200 at intervals and in an insulating manner, the first elongated arc extinguishing plate 120 and the second elongated arc extinguishing plate 130 are sequentially installed between a 5 th arc extinguishing plate and a 6 th arc extinguishing plate from a side of the arc extinguish chamber 100 close to the stationary contact, and the arc extinguishing plates referred to herein include the general arc extinguishing plates 110 and the first arc striking plate 140 and/or the second arc striking plate 150; the first tab 140 is disposed on a side of the arc extinguish chamber 100 close to the fixed contact, and the second tab 150 is disposed on a side of the arc extinguish chamber 100 close to the movable contact. Furthermore, open slots are formed in the ends, close to the contact system, of the first lengthened arc extinguishing piece 120, the second lengthened arc extinguishing piece 130 and the first arc striking piece 140, the area of the bottom of each open slot is larger than that of the front of each open slot, the bottom of each open slot is far away from the contact system, and the front of each open slot is close to the contact system.
Further, the lower ends of the first elongated arc extinguishing piece 120 and the first arc striking piece 140 are respectively bent, so that the lower ends are warped towards the direction of the second arc striking piece 150, and it should be noted that the lower ends herein refer to the ends of the first elongated arc extinguishing piece 120 and the first arc striking piece 140 close to the contact system.
Further, the second tab 150 has a bent lower end, such that the lower end is warped toward the first arc chute 120. The lower end of the second tab 150 refers to an end of the second tab 120 close to the contact system.
Specifically, referring to fig. 2, the arc extinguish chamber 100 includes at least ten general arc extinguish plates 110, the general arc extinguish plates 110 are sequentially staggered up and down in an insulating manner and are respectively fixed on the insulating housing 200, at least one first elongated arc extinguish plate 120 and at least one second elongated arc extinguish plate 130 are provided between one side and the middle portion of the arc extinguish chamber 100, one end of each of the first elongated arc extinguish plate 120 and the second elongated arc extinguish plate 130 extends downward, i.e., in a direction close to the contact system, and is closer to the contact system than one end of the general arc extinguish plate 110, wherein one end of the first elongated arc extinguish plate 120 is provided with a bend in a direction close to the movable contact.
Referring to fig. 2 and 3, a first opening groove 121 and a second opening groove 131 are respectively formed in the middle of one end of each of the first elongated arc-extinguishing plate 120 and the second elongated arc-extinguishing plate 130, which is close to the contact system, the first opening groove 121 includes a bottom portion 121-a and a front portion 121-b, wherein the front portion 121-b is closer to the contact system than the bottom portion 121-a, and the opening area of the bottom portion 121-a is larger than that of the front portion 121-b; the second open slot 131 comprises a bottom 131-a and a front 131-b, wherein the front 131-b is closer to the contact system than the bottom 131-a, and the bottom 131-a has a larger open area than the front 121-b. The downwardly extending end of the first elongated arc plate 120 (i.e., the end near the contact system) is longer than the downwardly extending end of the second elongated arc plate 130 (i.e., the end near the contact system), and the downwardly extending portions of the first elongated arc plate 120 and the second elongated arc plate 130 form an acute angle.
Referring to fig. 5, in a preferred embodiment, a first arc striking plate 140 is disposed at one side of the arc extinguishing chamber 100 and extends downward, and a bent structure is disposed at an end of the first arc striking plate 140, and the bent structure forms an acute angle with the general arc extinguishing plate 110. A third open groove 141 is formed in the middle of the end of the first tab 140 that protrudes downward (i.e., the end that is close to the contact system), and the third open groove 141 includes a bottom portion 141-a and a front portion 141-b, wherein the front portion 141-b is closer to the contact system than the bottom portion 141-a, and the bottom portion 141-a has a larger open area than the front portion 141-b.
In a preferred embodiment, a second arc striking plate 150 extending downward is disposed on the other side of the arc extinguishing chamber 100, the second arc striking plate 150 is disposed opposite to the first arc striking plate 140, the number of the second arc striking plates 150 is at least one, or a plurality of second arc striking plates can be stacked, which is the same as the first arc striking plate 140, and the second arc striking plate 150 and the general arc extinguishing plate 110 form a certain acute angle and extend downward.
It should be noted that the same effects of the present solution can be obtained by adjusting the positions of the first elongated arc-extinguishing plates 120 and the second elongated arc-extinguishing plates 130 in the embodiment of the present invention, and the present invention is also within the protection scope of the present invention.
It should be noted that the same effect of the present solution can be obtained by adjusting the installation sequence of the first elongated arc-extinguishing plates 120 and the second elongated arc-extinguishing plates 130 in the embodiment of the present invention, and the present invention is also within the protection scope of the present invention.
It should be noted that the same effect of the present invention can be obtained by adjusting the number of the first arc-extinguishing plates 140 and the second arc-extinguishing plates 150 in the embodiment of the present invention, and the present invention is also within the protection scope of the present invention.
It should be noted that the shapes of the open slots of the first elongated arc-extinguishing piece 120, the second elongated arc-extinguishing piece 130 and the first arc runner 140 in the embodiment of the present invention are changed, but it is within the scope of the present invention to fit the relationship of the area of the bottom and the front end of the open slot.
According to the arc extinguishing chamber of the circuit breaker, the arc extinguishing capacity of the arc extinguishing chamber is enhanced through the improvement of the arc extinguishing grid sheet structure and the arrangement mode of the arc extinguishing chamber of the circuit breaker, and the fact that the electrical service life and the breaking capacity of the frame circuit breaker in a direct current system meet the requirements of relevant standards is ensured. Meanwhile, the circuit breaker can be applied to an alternating current system through practice, and the requirement for rapidly extinguishing electric arcs can be met.
The above is merely a preferred embodiment of the present invention, and those skilled in the art can make various changes or modifications to the embodiment of the present invention according to the disclosure of the application document without departing from the spirit and scope of the present invention.
Claims (8)
1. An arc chute (100) of a circuit breaker, characterized in that: the arc extinguishing chamber (100) comprises at least ten universal arc extinguishing plates (110), the universal arc extinguishing plates (110) are sequentially arranged and fixed in an insulating state, at least one first lengthened arc extinguishing plate (120) and at least one second lengthened arc extinguishing plate (130) are arranged between one side of the arc extinguishing chamber (100) and the middle of the arc extinguishing chamber, one ends of the first lengthened arc extinguishing plate (120) and the second lengthened arc extinguishing plate (130) extend out towards the direction close to a contact system and are longer than the universal arc extinguishing plates (110), one end of the first lengthened arc extinguishing plate (120) is provided with a bending structure, the middle parts of the first lengthened arc extinguishing plate (120) and the second lengthened arc extinguishing plate (130), close to the end, extending out of the contact system, are respectively provided with a first open slot (121) and a second open slot (131), the first open slot (121) and the second open slot (131) respectively comprise bottoms (121-a), (131-a) and fronts (121-b), (131-131 b), and the areas of the bottoms (121-a) and the second open slots (131-131 a) are respectively greater than the areas of the first open slot (121-a) and the fronts (121-131 a) and the second open slot (131-131 b); the first lengthened arc-extinguishing piece (120) is longer than the second lengthened arc-extinguishing piece (130) in the extending length in the direction close to the contact system, and an acute angle is formed between the portions, extending in the direction close to the contact system, of the first lengthened arc-extinguishing piece (120) and the second lengthened arc-extinguishing piece (130).
2. Arc chamber (100) of a circuit breaker according to claim 1, characterized in that: one side of the arc extinguish chamber (100) is provided with a first arc striking plate (140) which extends towards the contact system.
3. Arc chamber (100) of a circuit breaker according to claim 2, characterized in that: one end of the first arc striking sheet (140) extending towards the contact system forms a certain acute angle with the general arc extinguishing sheet (110).
4. Arc chamber (100) of a circuit breaker according to claim 2 or 3, characterized in that: the middle of the forward extending part of the first arc striking piece (140) is provided with a third opening groove (141), and the opening area of the bottom part (141-a) of the third opening groove (141) is larger than that of the front part (141-b) thereof.
5. Arc chamber (100) of a circuit breaker according to claim 2, characterized in that: and a second arc striking sheet (150) which extends forwards is arranged on the other side of the arc extinguishing chamber (100).
6. Arc chamber (100) of a circuit breaker according to claim 5, characterized in that: the number of the second arc striking pieces (150) is one or more than one.
7. Arc chamber (100) of a circuit breaker according to claim 5, characterized in that: one end of the second arc striking plate (150) extends out close to the contact system and forms a certain acute angle with the general arc extinguishing plate (110).
8. Arc chamber (100) of a circuit breaker according to claim 1, characterized in that: the universal arc extinguishing plate (110) is arranged in an insulating shell (200).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910460207 | 2019-05-30 | ||
| CN201910460207X | 2019-05-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112017923A CN112017923A (en) | 2020-12-01 |
| CN112017923B true CN112017923B (en) | 2023-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010017378.8A Active CN112017923B (en) | 2019-05-30 | 2020-01-08 | Arc extinguish chamber of circuit breaker |
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| Country | Link |
|---|---|
| CN (1) | CN112017923B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010251299A (en) * | 2009-03-26 | 2010-11-04 | Mitsubishi Electric Corp | Circuit breaker |
| CN103065895A (en) * | 2012-12-18 | 2013-04-24 | 西安交通大学 | Contact and arc extinguishing system for universal type low-voltage circuit breaker |
| CN103531412A (en) * | 2013-10-28 | 2014-01-22 | 江苏凯隆电器有限公司 | Breaker arc extinguishing system |
| JP2015076239A (en) * | 2013-10-08 | 2015-04-20 | 富士電機機器制御株式会社 | Circuit breaker |
| CN108447714A (en) * | 2018-04-04 | 2018-08-24 | 上海电科电器科技有限公司 | Arc-chutes |
-
2020
- 2020-01-08 CN CN202010017378.8A patent/CN112017923B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010251299A (en) * | 2009-03-26 | 2010-11-04 | Mitsubishi Electric Corp | Circuit breaker |
| CN103065895A (en) * | 2012-12-18 | 2013-04-24 | 西安交通大学 | Contact and arc extinguishing system for universal type low-voltage circuit breaker |
| JP2015076239A (en) * | 2013-10-08 | 2015-04-20 | 富士電機機器制御株式会社 | Circuit breaker |
| CN103531412A (en) * | 2013-10-28 | 2014-01-22 | 江苏凯隆电器有限公司 | Breaker arc extinguishing system |
| CN108447714A (en) * | 2018-04-04 | 2018-08-24 | 上海电科电器科技有限公司 | Arc-chutes |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112017923A (en) | 2020-12-01 |
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Effective date of registration: 20240521 Address after: 301800 No. 17-1 Chaoyang East Road, Koudong Industrial Park, Baodi Economic Development Zone, Baodi District, Tianjin, China Patentee after: SOOAR (TIANJIN) ELECTRICAL EQUIPMENT Co.,Ltd. Country or region after: China Address before: 102600 2nd floor, building 2, 29 Jinyuan Road, economic development zone, Daxing District, Beijing Patentee before: BEIJING JINGREN ELECTRIC APPLIANCE Co.,Ltd. Country or region before: China |