CN110098095B - Air-blowing type low-voltage arc extinguishing device and circuit breaker - Google Patents
Air-blowing type low-voltage arc extinguishing device and circuit breaker Download PDFInfo
- Publication number
- CN110098095B CN110098095B CN201910509636.1A CN201910509636A CN110098095B CN 110098095 B CN110098095 B CN 110098095B CN 201910509636 A CN201910509636 A CN 201910509636A CN 110098095 B CN110098095 B CN 110098095B
- Authority
- CN
- China
- Prior art keywords
- arc extinguishing
- base
- air
- blowing
- arc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007664 blowing Methods 0.000 title claims abstract description 35
- 238000005192 partition Methods 0.000 claims abstract description 11
- 238000010891 electric arc Methods 0.000 abstract description 16
- 230000003068 static effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- 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
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/302—Means for extinguishing or preventing arc between current-carrying parts wherein arc-extinguishing gas is evolved from stationary parts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention relates to an air-blowing type low-voltage arc extinguishing device, which comprises an air-blowing arc extinguishing structure; the air-blowing arc extinguishing structure comprises a base, an arc extinguishing chamber and an air-blowing plate; the base is provided with a baffle plate; a dovetail groove is formed in the partition plate; the air blowing plate is arranged in the dovetail groove; the arc extinguishing chamber is arranged in the base; the arc extinguishing chamber comprises side plates and an arc extinguishing grid sheet group fixed between the two side plates; the arc extinguishing grid sheet group is formed by stacking a plurality of arc extinguishing grid sheets; an airflow flowing gap exists between adjacent arc extinguishing grid plates; the arc chute sheet includes a base, a first leg and a second leg extending from the base in the same direction. The invention effectively shortens the arc extinguishing time, prevents the electric arc from burning the moving contact and/or the static contact, reduces the total breaking time of the circuit breaker and improves the breaking capacity.
Description
Technical Field
The invention relates to the field of electrical devices, in particular to an air-blowing type low-voltage arc extinguishing device and a circuit breaker.
Background
When the contacts of the switch are separated to cut off a power circuit, the moving contact and the fixed contact of the existing low-voltage circuit breaker can generate electric arcs in the breaking process. The larger the breaking current, the larger the generated arc. When the electric arc exists and the circuit is not cut off, if the electric arc can not be extinguished rapidly, the high temperature of the electric arc can melt or burn the surface of the moving contact or the static contact, and when the electric arc is severe, the whole contact system is burnt, and irreversible damage is generated to the upper and lower stages of the circuit, so that arc extinguishing measures are adopted in various switches. The process of cooling and elongating the arc in a gas stream by blowing the arc longitudinally or transversely with a gas, resulting in a strong de-ionization is called gas-blow extinction.
The air blowing structure in the prior art is characterized in that air blowing parts are arranged at the side plates of the arc extinguishing chamber in a riveting mode and the like, the assembly is complex, and an arc generated in the breaking process burns the riveting parts, so that the air blowing parts are loose and fall down, and the breaking performance of the circuit breaker is affected.
Disclosure of Invention
Aiming at the defects and shortcomings of the prior art, the invention discloses a blowing type low-voltage arc extinguishing device and a circuit breaker.
The technical scheme adopted by the invention is as follows:
the circuit breaker comprises a blowing type low-voltage arc extinguishing device;
The air-blowing type low-voltage arc extinguishing device comprises an air-blowing arc extinguishing structure; the air-blowing arc extinguishing structure comprises a base, an arc extinguishing chamber and an air-blowing plate; the base is provided with a baffle plate; a dovetail groove is formed in the partition plate; the air blowing plate is arranged in the dovetail groove; the arc extinguishing chamber is arranged in the base; the arc extinguishing chamber comprises side plates and an arc extinguishing grid sheet group fixed between the two side plates; the arc extinguishing grid sheet group is formed by stacking a plurality of arc extinguishing grid sheets; an airflow flowing gap exists between adjacent arc extinguishing grid plates; the arc extinguishing grid sheet comprises a base part, a first leg part and a second leg part, wherein the first leg part and the second leg part extend from the base part towards the same direction;
The circuit breaker comprises an operating mechanism, a fixed contact and a moving contact; the handle of the operating mechanism is arranged on the base; the connecting rod of the operating mechanism extends into the base; the moving contact is connected with the operating mechanism through the connecting rod; the fixed contact is arranged in the base;
the dovetail groove is positioned beside the fixed contact and the moving contact, and the moving contact and the fixed contact are insulated from the leg parts of the arc extinguishing grid sheet group by the partition plates.
The method is further technically characterized in that: the arc chute plates at the top and bottom also include guide plates that tilt upward from the center of the base.
The method is further technically characterized in that: the base of the arc extinguishing grid sheet positioned between the top and the bottom comprises a first curved part and a second curved part; the first curved part protrudes from the second curved part.
The method is further technically characterized in that: and the positions of the first curved part and the second curved part are opposite.
The method is further technically characterized in that: and a bent arc striking plate is arranged above the air blowing plate.
The beneficial effects of the invention are as follows:
1. The partition board is designed on the base, and is not required to be additionally installed in a connecting mode such as riveting, so that a large amount of electric arcs generated by separation of the moving contact and the fixed contact are blocked by the partition board when the circuit breaker breaks, and the electric arcs are effectively prevented from being mixed.
2. The separator plate is provided with the dovetail groove, the dovetail groove is internally provided with the air blowing plate, and the high temperature caused by the electric arc enables the air blowing plate to generate gas and blow off the base part of the arc extinguishing grid, so that the electric arc is extinguished in a short time.
3. The base, the first leg and the second leg are integrally formed, and do not deform greatly during installation.
Drawings
Fig. 1 is a top view of the present invention.
Fig. 2 is a schematic view of the arc chute of fig. 1.
Fig. 3 is a schematic diagram of a circuit breaker.
In the figure: 10. a base; 11. a partition plate; 12. a dovetail groove; 20. an arc extinguishing chamber; 21. a side plate; 22. arc extinguishing grid plates; 23. a base; 231. a first curved portion; 232. a second curved portion; 24L, first leg; 24R, second leg; 25. a guide plate; 30. an air blowing plate; 40. an operating mechanism; 50. a stationary contact; 60. a moving contact; 70. an arc striking plate.
Detailed Description
The following describes a specific implementation of the present embodiment with reference to the drawings.
Fig. 1 is a top view of the present invention, and fig. 2 is a schematic view of the arc extinguishing chamber of fig. 1. Referring to fig. 1 and 2, an air-blown low-voltage arc extinguishing device includes an air-blown arc extinguishing structure. The gas blowing arc extinguishing structure includes a base 10, an arc extinguishing chamber 20 and a gas blowing plate 30. The base 10 is provided with a partition 11. The base 10 is integrally formed with a spacer 11, the spacer 11 insulating the moving contact 60 and the stationary contact 50 from the legs of the arc chute sheet set. The separator 11 is provided with a dovetail groove 12. The air-blast plate 30 is mounted in the dovetail groove 12. The arc chute 20 is installed in the base 10. The arc extinguishing chamber 20 includes side plates 21 and an arc extinguishing gate sheet group fixed between the two side plates 21. The arc extinguishing gate sheet group is formed by stacking a plurality of arc extinguishing gate sheets 22. There is an airflow gap between adjacent arc extinguishing bars 22. The arc extinguishing gate 22 includes a base 23, a first leg 24L and a second leg 24R extending from the base 23 toward the same direction and fixed to the side plate 21. The base 23, the first leg 24L, and the second leg 24R are integrally formed. One side of the base 23 protrudes outward.
The arc chute 22 at the top and bottom further includes a guide plate 25 tilted upward from the center of the base 23. The base 23 of the arc chute 22 between the top and bottom includes a first curved portion 231 and a second curved portion 232, the first curved portion 231 protruding from the second curved portion 232. The positions of the first curved portion 231 and the second curved portion 232 are opposite to each other in the adjacent two arc extinguishing gate plates 22.
A bent arc striking plate 70 is installed above the air blowing plate 30. The arc striking plate 70 is used for guiding the arc to the guide plate 25 during breaking, so that the arc is prevented from being mixed.
Fig. 3 is a schematic diagram of a circuit breaker. As shown in fig. 3, a circuit breaker includes the above-mentioned air-blowing type low-voltage arc extinguishing device.
The circuit breaker includes an operating mechanism 40, a stationary contact 50, and a moving contact 60. The handle of the operating mechanism 40 is mounted on the base 10. The links of the operating mechanism 40 extend into the base 10. The movable contact 60 is connected to the operating mechanism 40 via a link. The stationary contact 50 is installed inside the base 10. The dovetail groove 12 is positioned beside the fixed contact 50 and the movable contact 60, and when the circuit breaker breaks, a large amount of high temperature is generated by the electric arc, a large amount of gas is generated by heating the air blowing plate 30, at the moment, the high pressure is generated inside the circuit breaker, the gas can be flushed out to a low-pressure area outside the circuit breaker, and the electric arc is blown to enable the electric arc to move to the arc extinguishing chamber faster, so that the arc extinguishing time is shortened.
The installation principle of the invention is as follows:
In the breaking process of the circuit breaker by the operating mechanism 40, a large amount of electric arc and heat are generated when the moving contact 60 is separated from the fixed contact 50, and the fixed contact 50 and the moving contact 60 are separated from the first leg 24L or the second leg 24R by the partition 11, so that the electric arc is blocked by the partition 11 to prevent random channeling.
The high temperature that the electric arc arouses makes the gas blow board 30 be heated, produces a large amount of gases after the gas blow board 30 is heated, and when gas was discharged, the gas blown the electric arc that the striking board 70 was drawn forth to explosion chamber 20 sooner, and the air current flow clearance of explosion chamber 20 cuts off the electric arc, reduces the arc voltage, effectively shortens the arc extinguishing time, prevents that electric arc from burning out and damaging moving contact 60 and/or stationary contact 50, reduces the full breaking time of circuit breaker, improves breaking capacity.
The above description is illustrative of the invention and not limiting, the scope of the invention being defined by the appended claims, which may be modified in any manner without departing from the basic structure of the invention.
Claims (5)
1. The circuit breaker, its characterized in that: comprises an air-blowing type low-voltage arc extinguishing device;
The air-blowing type low-voltage arc extinguishing device comprises an air-blowing arc extinguishing structure; the air-blowing arc extinguishing structure comprises a base (10), an arc extinguishing chamber (20) and an air-blowing plate (30); the base (10) is provided with a baffle plate (11); a dovetail groove (12) is formed in the partition plate (11); the air blowing plate (30) is arranged in the dovetail groove (12); the arc extinguishing chamber (20) is arranged in the base (10); the arc extinguishing chamber (20) comprises side plates (21) and an arc extinguishing grid sheet group fixed between the two side plates (21); the arc extinguishing grid sheet group is formed by stacking a plurality of arc extinguishing grid sheets (22); an airflow flowing gap exists between the adjacent arc extinguishing grid plates (22); the arc extinguishing grid sheet (22) comprises a base (23), a first leg (24L) and a second leg (24R) extending from the base (23) towards the same direction;
The circuit breaker comprises an operating mechanism (40), a fixed contact (50) and a moving contact (60); the handle of the operating mechanism (40) is arranged on the base (10); the connecting rod of the operating mechanism (40) extends into the base (10); the moving contact (60) is connected with the operating mechanism (40) through the connecting rod; the fixed contact (50) is arranged inside the base (10);
the dovetail groove (12) is positioned beside the fixed contact (50) and the movable contact (60), and the movable contact (60) and the fixed contact (50) are insulated from the leg parts of the arc extinguishing grid sheet group by the partition plate (11).
2. The circuit breaker according to claim 1, characterized in that: the arc extinguishing grid plates (22) positioned at the top and the bottom also comprise guide plates (25) which are tilted upwards from the center of the base (23).
3. The circuit breaker according to claim 1, characterized in that: the base (23) of the arc chute sheet (22) between the top and bottom comprises a first curved portion (231) and a second curved portion (232); the first curved part (231) protrudes from the second curved part (232).
4. A circuit breaker according to claim 3, characterized in that: two adjacent arc extinguishing bars (22), the positions of the first curved part (231) and the second curved part (232) are opposite.
5. The circuit breaker according to claim 1, characterized in that: and a bent arc striking plate (70) is arranged above the air blowing plate (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910509636.1A CN110098095B (en) | 2019-06-13 | 2019-06-13 | Air-blowing type low-voltage arc extinguishing device and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910509636.1A CN110098095B (en) | 2019-06-13 | 2019-06-13 | Air-blowing type low-voltage arc extinguishing device and circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110098095A CN110098095A (en) | 2019-08-06 |
| CN110098095B true CN110098095B (en) | 2024-04-19 |
Family
ID=67450803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910509636.1A Active CN110098095B (en) | 2019-06-13 | 2019-06-13 | Air-blowing type low-voltage arc extinguishing device and circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110098095B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202178224U (en) * | 2011-08-05 | 2012-03-28 | 上海电科电器科技有限公司 | Arc extinction system of breaker for device |
| CN102568966A (en) * | 2010-12-16 | 2012-07-11 | 上海明科电气有限公司 | Back-up surge protection breaker |
| CN203250707U (en) * | 2013-03-21 | 2013-10-23 | 浙江正泰电器股份有限公司 | Grid arc-extinguishing chamber for low-voltage circuit breaker |
| CN104934270A (en) * | 2015-06-26 | 2015-09-23 | 温州罗格朗电器有限公司 | Circuit breaker |
| CN105762041A (en) * | 2016-05-17 | 2016-07-13 | 浙江人民电器有限公司 | Arc extinguishing structure of direct current circuit breaker |
| CN206921777U (en) * | 2017-06-12 | 2018-01-23 | 上海良信电器股份有限公司 | A kind of omnipotent breaker arc-chutes structure-improved |
| CN207353120U (en) * | 2017-09-06 | 2018-05-11 | 李蕊名 | A kind of arc extinguishing grid pieces group in control and protective switching device |
| CN209658121U (en) * | 2019-06-13 | 2019-11-19 | 江苏凯隆电器有限公司 | Air-sweeping type low-voltage arc eliminating device and breaker |
-
2019
- 2019-06-13 CN CN201910509636.1A patent/CN110098095B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568966A (en) * | 2010-12-16 | 2012-07-11 | 上海明科电气有限公司 | Back-up surge protection breaker |
| CN202178224U (en) * | 2011-08-05 | 2012-03-28 | 上海电科电器科技有限公司 | Arc extinction system of breaker for device |
| CN203250707U (en) * | 2013-03-21 | 2013-10-23 | 浙江正泰电器股份有限公司 | Grid arc-extinguishing chamber for low-voltage circuit breaker |
| CN104934270A (en) * | 2015-06-26 | 2015-09-23 | 温州罗格朗电器有限公司 | Circuit breaker |
| CN105762041A (en) * | 2016-05-17 | 2016-07-13 | 浙江人民电器有限公司 | Arc extinguishing structure of direct current circuit breaker |
| CN206921777U (en) * | 2017-06-12 | 2018-01-23 | 上海良信电器股份有限公司 | A kind of omnipotent breaker arc-chutes structure-improved |
| CN207353120U (en) * | 2017-09-06 | 2018-05-11 | 李蕊名 | A kind of arc extinguishing grid pieces group in control and protective switching device |
| CN209658121U (en) * | 2019-06-13 | 2019-11-19 | 江苏凯隆电器有限公司 | Air-sweeping type low-voltage arc eliminating device and breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110098095A (en) | 2019-08-06 |
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