CN112053923B - Improved low-voltage switch arc-extinguishing device - Google Patents
Improved low-voltage switch arc-extinguishing device Download PDFInfo
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- CN112053923B CN112053923B CN201910488302.0A CN201910488302A CN112053923B CN 112053923 B CN112053923 B CN 112053923B CN 201910488302 A CN201910488302 A CN 201910488302A CN 112053923 B CN112053923 B CN 112053923B
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- extinguishing
- plate
- arc extinguishing
- group
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- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 238000002955 isolation Methods 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 210000001015 abdomen Anatomy 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract description 10
- 239000007789 gas Substances 0.000 description 27
- 230000000694 effects Effects 0.000 description 8
- 238000010891 electric arc Methods 0.000 description 7
- 238000007664 blowing Methods 0.000 description 4
- 238000004880 explosion Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002242 deionisation method Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
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
-
- 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 utility model provides an improvement low tension switch arc extinguishing device, includes arc-isolating plate (1, 1 ') that a pair face to face and establish, arc extinguishing bar piece group (2), arc striking piece (3), gas production spare (4) and arc-extinguishing chamber (5), the shank of arc extinguishing bar piece group (2) is wrapped up by gas production spare (4), the both sides end-mounting of arc extinguishing bar piece group (2) is in on arc-isolating plate (1, 1') that a pair face to face and establish, arc striking piece (3) dress in the back of arc extinguishing bar piece group (2), its characterized in that: the gas generating part (4) is arranged on a base (6) of the switch, and the arc extinguishing cover (5) is arranged on the top of the arc extinguishing grid sheet group (2) by utilizing a clamping structure and arc isolating plates (1, 1') arranged opposite to the pair of faces. The installation mode of the gas producing part of the arc extinguish chamber and the arc extinguish chamber is changed, the reliability of the installation of the gas producing part of the arc extinguish chamber is improved, and the installation difficulty of the arc extinguish chamber is simplified.
Description
Technical Field
The invention belongs to the technical field of circuit breakers, and particularly relates to an improved low-voltage switch arc extinguishing device.
Background
The breaking function of the circuit breaker for overload or short-circuit current is mainly completed through an arc extinguishing system arranged in the circuit breaker. When fault current occurs in the circuit and the current value exceeds the set protection range of the intelligent controller, the operating mechanism is driven to act, so that the moving contact and the fixed contact of the circuit breaker are rapidly disconnected, and at the moment, the voltage between the moving contact and the fixed contact causes air medium discharge so as to generate high-temperature arc. The arc causes a sharp rise in the air temperature within the arc extinguishing device during combustion, thereby accelerating air ionization. On the other hand, the electric arc is separated into a plurality of short arcs by a plurality of arc separation grid plates under the pushing of the magnetic field and the fluid effect in the arc extinguishing chamber, the deionization effect of the electric arc is enhanced by virtue of the metal arc separation plates, the electric arc is reduced, the voltage is rapidly increased, and the electric arc is extinguished. In order to improve the arc extinguishing performance of the arc extinguishing chamber, the arc is generally required to enter the arc extinguishing grid plate of the arc extinguishing chamber rapidly, so that the grid plate can effectively cut the arc, and the aim of rapidly extinguishing the arc is fulfilled. To achieve this, it is common practice to: and an arc is enabled to enter the arc extinguishing grid plate of the arc extinguishing chamber rapidly by adopting an air blowing or magnetic blowing technology. For the air blowing technology, the air generating material is usually adopted and is matched with an arc channel (called Laval nozzle) which gradually contracts, and the principle of the scheme is that the air pressure at the front end of the arc extinguishing chamber is higher than the back of the arc extinguishing chamber through the arc channel which gradually contracts, so that air flow is formed, and the electric arc is blown to move towards the arc extinguishing chamber. The effect of this solution is critically to control the speed of the airflow, which generally depends on the differential pressure of the gases at the front and rear ends of the arc chute. The structure of the existing low-voltage circuit breaker arc extinguishing system can not achieve the expected effect, the phenomenon of arc escape often occurs, and the arc extinguishing effect of an arc extinguishing chamber is weakened.
The Chinese patent ZL201720674943.1 discloses an improved structure of an arc-extinguishing chamber for a universal circuit breaker, which comprises a side plate, an arc-extinguishing grid sheet group, an arc striking sheet, a gas generating sheet, an arc-extinguishing cover and a flame-extinguishing sheet, wherein the foot part of the arc-extinguishing grid sheet group is wrapped by the gas generating sheet, the arc-extinguishing grid sheet is assembled in front of the arc striking sheet, the arc-extinguishing cover and the tail side end of the arc-extinguishing grid sheet group are assembled together to form a flame-extinguishing chamber, the flame-extinguishing sheet is arranged in the flame-extinguishing chamber, one side surface of the foot part of the gas generating sheet, which wraps the arc-extinguishing grid sheet group, is an arc-blocking plate, and the front of the arc-extinguishing grid sheet at the front end of the arc-extinguishing grid sheet group is provided with the arc-blocking plate; the arc extinguishing chamber adopts arc structure with the gas production piece of explosion chamber and is provided with the fender arc board in the arc extinguishing bars piece the place ahead of arc extinguishing bars piece group front end, is favorable to the electric arc to be blown into the explosion chamber, and the arc extinguishing bars piece adopts the installation of different thickness and interval difference between the adjacent arc extinguishing bars piece simultaneously to increase the heat capacity of explosion chamber, increase arc voltage, in order to improve the short circuit breaking capacity of circuit breaker. However, the gas generating member of the arc extinguishing chamber is fixed with the side plate by adopting a fixing mode such as hot riveting, buckling or copper rivet, and the like, so that the gas generating member is not firmly fixed or is easy to fall off under the impact of an electric arc. In addition, the arc-extinguishing cover is fixed by using screws or rivets, so that the assembly is inconvenient, and the free flame-extinguishing sheet structure in the arc-extinguishing cover can not realize zero flashover.
Disclosure of Invention
The invention aims at solving the technical defects that the existing installation mode of the gas generating part of the arc-extinguishing chamber is easy to fall off and the arc-extinguishing chamber is inconvenient to assemble, and provides an improved low-voltage switch arc-extinguishing device, which changes the installation modes of the gas generating part and the arc-extinguishing chamber, increases the installation reliability of the gas generating part of the arc-extinguishing chamber and simplifies the installation difficulty of the arc-extinguishing chamber.
Technical proposal
In order to achieve the technical purpose, the invention provides an improved low-voltage switch arc extinguishing device, which comprises a pair of arc-isolating plates arranged opposite to each other, an arc-extinguishing grid sheet group, an arc striking sheet, a gas generating piece and an arc-extinguishing cover, wherein the leg parts of the arc-extinguishing grid sheet group are wrapped by the gas generating piece, the two side ends of the arc-extinguishing grid sheet group are arranged on the arc-isolating plates arranged opposite to each other, and the arc striking sheet is arranged on the back surface of the arc-extinguishing grid sheet group, and the invention is characterized in that: the gas generating piece is arranged on the base of the switch, and the arc extinguishing cover is arranged at the top of the arc extinguishing grid sheet group by utilizing a clamping structure and arc baffles arranged opposite to the pair of arc extinguishing plates.
Further, the lower end of the plate surface of the gas generating piece extends out of the pin, the pin is inserted on the base, the inner side of the plate surface of the gas generating piece extends out of the inclined plane groove, and the leg parts of the arc extinguishing grid sheet group are wrapped by the inclined plane groove of the gas generating piece.
Further, the buckle structure comprises at least two buckles arranged on the arc extinguishing cover, and the buckles are arranged in corresponding square grooves on the arc-isolating plates arranged opposite to the pair of faces.
Further, an open slot is arranged on one side of the arc extinguishing chamber, the flame extinguishing plates, the arc isolation seat plates and the metal mesh plates are inserted in the open slot and locked and capped by the cover plate, the metal mesh plates are positioned at the bottom of the open slot, and at least one flame extinguishing plate is respectively arranged on two sides of the arc isolation seat plates.
Further, the arc isolation seat board is provided with a plurality of first meshes, the front surface and the back surface of the arc isolation seat board are provided with a plurality of bosses, and the bosses and the first meshes are staggered.
Further, grooves are formed in the side ends of the front face and the back face of the arc isolation seat plate and used for installing flame extinguishing plates.
Further, the fire extinguishing plate is provided with second meshes which are staggered with the first meshes of the arc isolation seat plate.
Further, the shape of the first grating sheet at the forefront end side of the arc extinguishing grating sheet group is in a central symmetry structure of the abdomen of the arc extinguishing grating sheet.
Further, the abdomen of the first grating sheet at the forefront end side of the arc extinguishing grating sheet group is a trapezoid or arc or square or rectangular notch.
Further, the arc-extinguishing grid plates of the arc-extinguishing grid plate group except the first grid plate at the forefront end side are of an asymmetric structure, and the front sides and the back sides of the two adjacent arc-extinguishing grid plates are connected.
Advantageous effects
According to the improved low-voltage switch arc extinguishing device, the gas generating piece is not fixed on the side wall of the arc extinguishing chamber, is installed and fixed in the switch base by adopting an independent structure, and encloses the movable contact piece in the switch base, so that the gas generating piece is firmly fixed and does not fall off; the arc extinguishing chamber is directly fixed with the grid sheet group by adopting at least two buckles, and the assembly is more convenient. The flame extinction in the arc-extinguishing chamber adopts two layers of porous insulating plates, porous arc-isolating plates and metal filter screen plate structures, so that the free arc-extinguishing effect can be achieved, and the zero arcing requirement of the arc-extinguishing chamber can be realized. The flame extinguishing plate is laterally arranged in the arc extinguishing chamber, and is convenient to assemble and reliable to fix.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is an exploded view of an embodiment of the present invention;
FIG. 3 is a schematic view of an installation structure of an embodiment of the present invention;
FIG. 4 is a schematic diagram of a gas generating member according to an embodiment of the present invention;
FIG. 5 is a schematic view of a structure of an arc seat plate according to an embodiment of the present invention;
fig. 6 is a schematic view of an installation structure of an arc extinguishing grid sheet group in an embodiment of the present invention.
Detailed Description
The invention will be further described with reference to the drawings and examples.
Examples
As shown in fig. 1,2 and 3, an improved low-voltage switch arc extinguishing device comprises a pair of arc-isolating plates 1,1 'arranged opposite to each other, an arc extinguishing grid plate group 2, an arc striking plate 3, a gas generating piece 4 and an arc extinguishing cover 5, wherein the leg parts of the arc extinguishing grid plate group 2 are wrapped by the gas generating piece 4, the two side ends of the arc extinguishing grid plate group 2 are arranged on the arc-isolating plates 1,1' arranged opposite to each other, the arc striking plate 3 is arranged on the back surface of the arc extinguishing grid plate group 2, wherein the gas generating piece 4 is arranged on a base 6 of the switch, a pin 401 extends out from the lower end of the plate surface of the gas generating piece 4, the pin 401 is inserted on the base 6, the gas generating piece 4 is not fixed on the side wall of the arc extinguishing chamber, and is fixed in the switch base 6 by adopting an independent structure, and the movable contact piece is enclosed inside the switch base 6, so that the fixed firm gas generating piece 4 is ensured to avoid falling risk; as shown in fig. 4, the inner side of the plate surface of the gas generating member 4 extends out of the inclined surface groove 402, and the leg portions of the arc extinguishing grid plate group 2 are wrapped by the inclined surface groove 402 of the gas generating member 4. The first grating 201 at the forefront side of the arc-extinguishing grating group 2 has a symmetrical structure with the abdomen of the arc-extinguishing grating. As shown in fig. 1,2 and 6, the abdomen of the first grid piece 201 at the forefront end side of the arc extinguishing grid piece group 2 is a trapezoid, an arc, a square or a rectangular notch, and the first grid piece can make the first grid piece closer to the contact area by adopting the structure, so that the magnetic blowing force of the first grid piece is improved, and the arc striking effect is better. The arc extinguishing grating sheet 202 of the arc extinguishing grating sheet group 2 except the first grating sheet 201 at the forefront end side is of an asymmetric structure, and the front and back sides of two adjacent arc extinguishing grating sheets are connected and installed, so that the arc is better in cutting and elongation effect by the grating sheets after entering the arc extinguishing chamber grating sheet area, and the arc is extinguished more rapidly.
The arc extinguishing chamber 5 is arranged at the top of the arc extinguishing gate sheet group 2 by utilizing a clamping structure and the arc barriers 1,1' arranged opposite to the pair of faces, so that the assembly is more convenient. Specifically, as shown in fig. 2, the fastening structure includes at least two fasteners 501 provided on the arc extinguishing chamber 5, and the fasteners 501 are mounted in corresponding square grooves 101,101 'on the arc-isolating plates 1,1' opposite to the pair of faces.
As shown in fig. 2, an open slot 502 is provided on one side of the arc extinguishing chamber 5, the flame extinguishing plate 7, the arc isolation seat plate 8 and the metal mesh plate 9 are inserted into the open slot 502 to lock the cover by using a cover plate 10 and screws 11, the arc isolation seat plate 8 is made of thermosetting plastic, and the flame extinguishing plate 7 is made of insulating materials such as laminated cloth plate, cardboard or ceramic. The metal mesh plate 9 is located at the bottom of the open slot 502, and at least one flame-extinguishing plate 7 is respectively arranged at two sides of the arc-isolating seat plate 8.
As shown in fig. 5, the arc isolation seat plate 8 is provided with a plurality of first meshes 801, the front and the back of the arc isolation seat plate 8 are provided with a plurality of bosses 802, and the bosses 802 are staggered with the first meshes 801. The side ends of the front and back sides of the arc isolation seat plate 8 are provided with grooves 803 for installing flame-extinguishing plates 7. The fire extinguishing plate 7 is provided with a second mesh 701, and the second mesh 701 is staggered with a first mesh 801 of the arc isolation seat plate 8. The arc extinguishing chamber can not only play a role in eliminating free arc extinguishing, but also can realize the zero arcing requirement of the arc extinguishing chamber. The flame extinguishing plate 7 is laterally arranged in the arc extinguishing chamber 5, and is convenient to assemble and reliable to fix.
The structures, proportions, sizes, amounts, etc. shown in the drawings of the embodiments of the present invention are for illustration and description only, and should not be construed as limiting the invention, so that any structural modifications, proportional changes, or adjustments of size may fall within the scope of the invention without affecting the efficacy and achievement of the invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", "clockwise", "anticlockwise" and the like are used in the present specification for convenience of description, and are not intended to limit the scope of the present invention, and the relative relation changes or modifications thereof are considered to be within the scope of the present invention without substantial modification of the technical content.
Claims (8)
1. The utility model provides an improvement low tension switch arc extinguishing device, includes arc-isolating plate (1, 1 ') that a pair face to face and establish, arc extinguishing bar piece group (2), arc striking piece (3), gas production spare (4) and arc-extinguishing chamber (5), the shank of arc extinguishing bar piece group (2) is wrapped up by gas production spare (4), the both sides end-mounting of arc extinguishing bar piece group (2) is in on arc-isolating plate (1, 1') that a pair face to face and establish, arc striking piece (3) dress in the back of arc extinguishing bar piece group (2), its characterized in that: the gas generating piece (4) is arranged on a base (6) of the switch, and the arc extinguishing cover (5) is arranged on the top of the arc extinguishing grid sheet group (2) by utilizing a clamping structure and arc isolating plates (1, 1') arranged opposite to the pair of faces;
The lower end of the plate surface of the gas generating part (4) extends out of the pin (401), the pin (401) is inserted on the base (6), the inner side of the plate surface of the gas generating part (4) extends out of the inclined plane groove (402), and the leg parts of the arc extinguishing grid plate group (2) are wrapped by the inclined plane groove (402) of the gas generating part (4);
The clamping structure comprises at least two clamping buckles (501) arranged on the arc extinguishing cover (5), and the clamping buckles (501) are arranged in corresponding square grooves (101, 101 ') on the arc-isolating plates (1, 1') opposite to the pair of faces.
2. An improved low voltage switch arc chute as in claim 1 wherein: one side of the arc extinguishing chamber (5) is provided with an open slot (502), the flame extinguishing sheet (7), the arc isolation seat board (8) and the metal screen (9) are inserted in the open slot (502) and are locked and covered by the cover plate (10), the metal screen (9) is positioned at the bottom of the open slot (502), and two sides of the arc isolation seat board (8) are respectively provided with at least one flame extinguishing sheet (7).
3. An improved low-voltage switch arc extinguishing device according to claim 2, characterized in that the arc isolation seat board (8) is provided with a plurality of first meshes (801), the front and the back of the arc isolation seat board (8) are provided with a plurality of bosses (802), and the bosses (802) are staggered with the first meshes (801).
4. An improved low voltage switch arc chute as in claim 2 wherein: grooves (803) are formed in the side ends of the front face and the back face of the arc isolation seat plate (8) and are used for installing flame extinguishing plates (7).
5. An improved low voltage switch arc chute as in claim 2 wherein: the fire extinguishing plate (7) is provided with a second mesh (701), and the second mesh (701) is staggered with a first mesh (801) of the arc isolation seat plate (8).
6. An improved low voltage switch arc chute as in claim 1 wherein: the shape of the first grating sheet (201) at the forefront end side of the arc extinguishing grating sheet group (2) is in a central symmetry structure of the abdomen of the arc extinguishing grating sheet.
7. An improved low voltage switch arc chute as in claim 6 wherein: the abdomen of the first grid sheet (201) at the forefront end side of the arc extinguishing grid sheet group (2) is a trapezoid or arc or square or rectangular notch.
8. An improved low voltage switch arc chute as in claim 7 wherein: the arc-extinguishing grid plates (202) of the arc-extinguishing grid plate group (2) except the first grid plate (201) at the forefront end side are of an asymmetric structure, and the front sides and the back sides of two adjacent arc-extinguishing grid plates are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910488302.0A CN112053923B (en) | 2019-06-05 | 2019-06-05 | Improved low-voltage switch arc-extinguishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910488302.0A CN112053923B (en) | 2019-06-05 | 2019-06-05 | Improved low-voltage switch arc-extinguishing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112053923A CN112053923A (en) | 2020-12-08 |
| CN112053923B true CN112053923B (en) | 2024-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910488302.0A Active CN112053923B (en) | 2019-06-05 | 2019-06-05 | Improved low-voltage switch arc-extinguishing device |
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| Country | Link |
|---|---|
| CN (1) | CN112053923B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112820567A (en) * | 2021-02-08 | 2021-05-18 | 厦门宏发开关设备有限公司 | Arc extinguish chamber structure and circuit breaker |
| CN117594373B (en) * | 2024-01-11 | 2024-04-05 | 诚硕电气有限公司 | Explosion chamber and arc extinguishing device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209963004U (en) * | 2019-06-05 | 2020-01-17 | 上海良信电器股份有限公司 | Improved arc-extinguishing device for low-voltage switch |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106710993A (en) * | 2015-11-12 | 2017-05-24 | 浙江正泰电器股份有限公司 | Universal circuit breaker arc extinguish chamber |
| CN205645727U (en) * | 2016-07-13 | 2016-10-12 | 广州白云电器设备股份有限公司 | Miniature circuit breaker's arc extinguishing structure |
| 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 |
| JP6832814B2 (en) * | 2017-09-01 | 2021-02-24 | 三菱電機株式会社 | Circuit breaker |
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- 2019-06-05 CN CN201910488302.0A patent/CN112053923B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209963004U (en) * | 2019-06-05 | 2020-01-17 | 上海良信电器股份有限公司 | Improved arc-extinguishing device for low-voltage switch |
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| CN112053923A (en) | 2020-12-08 |
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