CN112038202A - Arc control device of switch contact - Google Patents
Arc control device of switch contact Download PDFInfo
- Publication number
- CN112038202A CN112038202A CN201910480635.9A CN201910480635A CN112038202A CN 112038202 A CN112038202 A CN 112038202A CN 201910480635 A CN201910480635 A CN 201910480635A CN 112038202 A CN112038202 A CN 112038202A
- Authority
- CN
- China
- Prior art keywords
- arc extinguishing
- arc
- bars piece
- extinguishing bars
- piece
- 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.)
- Pending
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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 utility model provides an arc control device of switch contact, includes arc extinguishing bars piece subassembly, arc extinguishing bars piece subassembly from the top down include a top arc extinguishing bars piece, a plurality of upper portion arc extinguishing bars piece and a plurality of middle arc extinguishing bars piece and a plurality of bottom arc extinguishing bars piece in proper order, upper portion arc extinguishing bars piece length weak point is no less than 3 pieces in middle arc extinguishing bars piece and quantity, the quantity of middle arc extinguishing bars piece is more than the quantity of upper portion arc extinguishing bars piece and the quantity of bottom arc extinguishing bars piece, be fan-shaped or parallel and level range setting between a plurality of middle arc extinguishing bars piece in vertical direction, upper portion arc extinguishing bars piece be fan-shaped range in vertical direction, the bars piece of its below is longer than the bars piece of top, a plurality of upper portion arc extinguishing bars piece shorten from its length from bottom to top in proper order, the length of top arc extinguishing bars piece short in the length of upper portion bars piece. The arc extinguishing device increases the number of arc extinguishing grid pieces through the structure that the moving contact and the static contact respectively extend up and down, thereby achieving the purposes of lengthening electric arcs and improving breaking capacity.
Description
Technical Field
The invention relates to the technical field of circuit breaker switches, in particular to an arc extinguishing device of a switch contact.
Background
The circuit breaker is an important part in a distribution electrical appliance, is mainly used for an industrial low-voltage power system, and is used for connecting and disconnecting current in a power grid circuit and protecting lines and power supply equipment from damage caused by faults of overload, undervoltage, short circuit, single-phase grounding and the like. The function of the circuit breaker to break overload or short-circuit current is mainly accomplished by an arc extinguishing chamber installed in the circuit breaker. When fault current occurs in a circuit and the current value exceeds the set protection range of the circuit breaker, the tripping mechanism acts to rapidly disconnect the moving contact and the fixed contact of the circuit breaker, the voltage between the moving contact and the fixed contact causes air medium discharge to generate high-temperature electric arc, the electric arc can burn the contact to influence the connection effect of the contact, so that the electric arc is transferred from the contact as fast as possible and is rapidly extinguished, the contact burning can be effectively reduced, and the purpose of prolonging the service life of the circuit breaker is achieved. In order to improve the arc extinguishing performance of the arc extinguishing chamber, generally, the arc enters into the arc extinguishing grid pieces of the arc extinguishing chamber quickly, so that the grid pieces effectively cut the arc, and the aim of quickly extinguishing the arc is fulfilled. The number of the grid pieces for effectively cutting the electric arc directly influences the arc extinguishing effect, so that the electric arc can be cut by more grid pieces under the condition of limited contact opening distance, and the breaking is favorably improved. However, the existing static contact arc striking piece extends upwards, which is not beneficial to arc lengthening; meanwhile, arc striking grid pieces of the arc extinguishing chamber are upward, so that the number of the grid pieces is not maximized, and the capability of extinguishing electric arcs is reduced.
Disclosure of Invention
The invention aims to overcome the technical defect that the absorbed static contact and arc extinguish chamber structure are not beneficial to arc extinguishing, and provides the arc extinguishing device of the switch contact.
In order to achieve the purpose, the invention adopts the following solution: the arc extinguishing device of the switch contact comprises an arc extinguishing grid plate component (1), wherein the arc extinguishing grid plate component (1) sequentially comprises a top arc extinguishing grid plate (2), a plurality of upper arc extinguishing grid plates (3), a plurality of middle arc extinguishing grid plates (4) and a plurality of bottom arc extinguishing grid plates (5) from top to bottom, the length of each upper arc extinguishing grid plate (3) is shorter than that of each middle arc extinguishing grid plate (4) and the number of the upper arc extinguishing grid plates is not less than 3, the bottom arc extinguishing grid plates (5) are arranged in parallel, the thickness of each bottom arc extinguishing grid plate (5) is larger than that of each middle arc extinguishing grid plate (4), the number of the middle arc extinguishing grid plates (4) is more than that of the upper arc extinguishing grid plates (3) and that of the bottom arc extinguishing grid plates (5), the arc extinguishing grid plates (4) are arranged in a fan shape or in a parallel and level mode in the vertical direction, and the upper arc extinguishing grid plates (3) are arranged in a fan, the grid plates below the arc extinguishing grid plates are longer than the grid plates above the arc extinguishing grid plates, the lengths of the upper arc extinguishing grid plates (3) are sequentially shortened from bottom to top, and the length of the top arc extinguishing grid plate (2) is shorter than that of the grid plate on the top of the upper arc extinguishing grid plate (3).
An arc striking angle (201) facing to the opening and stopping position of the moving contact (6) is arranged at the position, corresponding to the moving contact (6), of the top arc-extinguishing grid piece (2), and the distance between the arc striking angle (201) and the opening and stopping position of the moving contact (6) is 0.1-3 mm.
The number of the bottom arc-extinguishing grid pieces (5) is at least 3.
The top arc-extinguishing grid plate (2) and the arc striking angle (201) form an inner bending angle not less than 120 degrees.
And the arc striking piece (701) of the static contact (7) corresponding to the moving contact (6) extends downwards.
Compared with the prior art, the invention has the following positive effects: the number of arc extinguishing grid pieces is increased through the structure that the moving contact and the static contact respectively extend upwards and downwards, so that the purposes of lengthening the electric arc and improving the breaking capacity are achieved.
Drawings
Fig. 1 is a sectional plan view of the present embodiment.
In the figure: 1. arc extinguishing bars piece subassembly, 2, top arc extinguishing bars piece, 3, upper portion arc extinguishing bars piece, 4, middle arc extinguishing bars piece, 5, bottom arc extinguishing bars piece, 6, moving contact, 7, static contact, 201, run-on angle, 701, run-on piece.
Detailed Description
The present invention will be described with reference to the following embodiments and accompanying drawings.
In order to achieve the purpose, the invention adopts the following solution: the arc extinguishing device of the switch contact comprises an arc extinguishing grid plate component (1), wherein the arc extinguishing grid plate component (1) sequentially comprises a top arc extinguishing grid plate (2), a plurality of upper arc extinguishing grid plates (3), a plurality of middle arc extinguishing grid plates (4) and a plurality of bottom arc extinguishing grid plates (5) from top to bottom, the length of each upper arc extinguishing grid plate (3) is shorter than that of each middle arc extinguishing grid plate (4) and the number of the upper arc extinguishing grid plates is not less than 3, the bottom arc extinguishing grid plates (5) are arranged in parallel, the thickness of each bottom arc extinguishing grid plate (5) is larger than that of each middle arc extinguishing grid plate (4), the number of the middle arc extinguishing grid plates (4) is more than that of the upper arc extinguishing grid plates (3) and that of the bottom arc extinguishing grid plates (5), the arc extinguishing grid plates (4) are arranged in a fan shape or in a parallel and level mode in the vertical direction, and the upper arc extinguishing grid plates (3) are arranged in a fan, the grid plates below the arc extinguishing grid plates are longer than the grid plates above the arc extinguishing grid plates, the lengths of the upper arc extinguishing grid plates (3) are sequentially shortened from bottom to top, and the length of the top arc extinguishing grid plate (2) is shorter than that of the grid plate on the top of the upper arc extinguishing grid plate (3).
An arc striking angle (201) facing to the opening and stopping position of the moving contact (6) is arranged at the position, corresponding to the moving contact (6), of the top arc-extinguishing grid piece (2), and the distance between the arc striking angle (201) and the opening and stopping position of the moving contact (6) is 0.1-3 mm.
The number of the bottom arc-extinguishing grid pieces (5) is at least 3.
The top arc-extinguishing grid plate (2) and the arc striking angle (201) form an inner bending angle not less than 120 degrees.
And the arc striking piece (701) of the static contact (7) corresponding to the moving contact (6) extends downwards.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all the minor modifications, equivalent replacements and improvements made to the above embodiment according to the technical spirit of the present invention should be included in the protection scope of the technical solution of the present invention.
Claims (5)
1. The utility model provides an arc control device of switch contact, includes arc extinguishing bars piece subassembly (1), arc extinguishing bars piece subassembly (1) from the top down include a top arc extinguishing bars piece (2), a plurality of upper portion arc extinguishing bars piece (3) and a plurality of middle arc extinguishing bars piece (4) and a plurality of bottom arc extinguishing bars piece (5) in proper order, 3 pieces are no less than in middle arc extinguishing bars piece (4) and quantity in upper portion arc extinguishing bars piece (3) length shortage between the bottom arc extinguishing bars piece (5), mutual parallel arrangement and bottom arc extinguishing bars piece (5) thickness are greater than between bottom arc extinguishing bars piece (5) the thickness of middle arc extinguishing bars piece (4), the quantity of middle arc extinguishing bars piece (4) is more than the quantity of upper portion arc extinguishing bars piece (3) and the quantity of bottom arc extinguishing bars piece (5), be fan-shaped or parallel and level between a plurality of middle arc extinguishing bars piece (4) and arrange the setting, its characterized in that it is: the upper arc-extinguishing grid plates (3) are arranged in a fan shape in the vertical direction, grid plates below the upper arc-extinguishing grid plates are longer than grid plates above the upper arc-extinguishing grid plates, the length of the upper arc-extinguishing grid plates (3) is shortened from bottom to top in sequence, and the length of the top arc-extinguishing grid plates (2) is shorter than that of the grid plates on the top of the upper arc-extinguishing grid plates (3).
2. An arc extinguishing device for a switching contact according to claim 1, characterized in that: an arc striking angle (201) facing to the opening and stopping position of the moving contact (6) is arranged at the position, corresponding to the moving contact (6), of the top arc-extinguishing grid piece (2), and the distance between the arc striking angle (201) and the opening and stopping position of the moving contact (6) is 0.1-3 mm.
3. An arc extinguishing device for a switching contact according to claim 1, characterized in that: the number of the bottom arc-extinguishing grid pieces (5) is at least 3.
4. An arc extinguishing device for a switching contact according to claim 2, characterized in that: the top arc-extinguishing grid plate (2) and the arc striking angle (201) form an inner bending angle not less than 120 degrees.
5. An arc extinguishing device for a switching contact according to claim 2, characterized in that: and the arc striking piece (701) of the static contact (7) corresponding to the moving contact (6) extends downwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910480635.9A CN112038202A (en) | 2019-06-04 | 2019-06-04 | Arc control device of switch contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910480635.9A CN112038202A (en) | 2019-06-04 | 2019-06-04 | Arc control device of switch contact |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112038202A true CN112038202A (en) | 2020-12-04 |
Family
ID=73576036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910480635.9A Pending CN112038202A (en) | 2019-06-04 | 2019-06-04 | Arc control device of switch contact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112038202A (en) |
-
2019
- 2019-06-04 CN CN201910480635.9A patent/CN112038202A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20201204 |
|
| WD01 | Invention patent application deemed withdrawn after publication |