CN114141593A - Arc extinguishing structure of circuit breaker for power transmission - Google Patents
Arc extinguishing structure of circuit breaker for power transmission Download PDFInfo
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- CN114141593A CN114141593A CN202111309582.8A CN202111309582A CN114141593A CN 114141593 A CN114141593 A CN 114141593A CN 202111309582 A CN202111309582 A CN 202111309582A CN 114141593 A CN114141593 A CN 114141593A
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- plate
- fixed
- arc extinguishing
- arc
- 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
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention belongs to the technical field of arc extinction of circuit breakers, and particularly relates to an arc extinction structure of a circuit breaker for power transmission. According to the invention, the insulating grid pieces are arranged, after the arc extinguishing grid pieces divide the arc voltage, the insulating grid pieces can prevent the arc from forming a guide pillar between the arc extinguishing grid pieces to cause short circuit of the arc extinguishing chamber, the voltage can be quickly segmented, the arc is prevented from reigniting, and the arc is further favorably cooled and extinguished in the arc extinguishing chamber.
Description
Technical Field
The invention relates to the technical field of arc extinction of circuit breakers, in particular to an arc extinction structure of a circuit breaker for power transmission.
Background
The breaker is a switching device which can close, bear and break the current under the condition of a normal loop and can close and open the current under the condition of an abnormal loop within a specified time, the electric arc is generated by electric breakdown of gas due to over strong electric field, so that the current passes through the transient spark phenomenon generated by an insulating medium under the normal state, when the load end is short-circuited, the short-circuit current passing through the breaker is rapidly increased, the moving contact and the static contact are rapidly separated through an operating mechanism under the action of electric repulsion force, meanwhile, the electric arc is elongated between the moving contact and the static contact and moves towards the direction of an arc extinguishing chamber grid piece of an arc extinguishing structure, the electric arc enters the grid piece and is divided into a plurality of short arcs under the action of magnetic blowing force and air blowing force, at the moment, the electric arc voltage is increased, the current peak value is reduced, and the electric arc is rapidly cooled and extinguished in the grid piece.
However, most of current arc extinguishing structures are when arc energy passes through the arc extinguishing bars, the voltage increase of a plurality of short arcs is cut apart into to the electric arc, and the short arc punctures the arc extinguishing bars easily between the arc extinguishing bars and causes the short circuit, leads to the electric arc can't extinguish, and the inconvenient change of current arc extinguishing mechanism has been damaged the arc extinguishing bars piece that punctures by the electric arc, and it is comparatively loaded down with trivial details to change the operation, therefore we have proposed a circuit breaker arc extinguishing structure for power transmission and have solved above-mentioned problem.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an arc extinguishing structure of a circuit breaker for power transmission, which solves the problems that most of the existing arc extinguishing structures are easy to break through arc extinguishing grids to cause short circuit, and the arc extinguishing grids which are damaged and broken through by electric arcs are inconvenient to replace.
(II) technical scheme
The invention specifically adopts the following technical scheme for realizing the purpose:
the utility model provides a circuit breaker arc extinguishing structure for power transmission, includes the base, two the top of base all is fixed with the curb plate, be fixed with the roof between the top of curb plate, a lateral wall of roof and curb plate is fixed with the baffle, two form the explosion chamber between curb plate, roof and the baffle, the equal slidable mounting of a lateral wall of curb plate has arc extinguishing bars piece and insulated gate piece, arc extinguishing bars piece and insulated gate piece homogeneous phase set up for the base slope, install the dismouting mechanism that is used for dismantling and installing the arc extinguishing bars piece on the roof, can segment voltage rapidly through setting up the insulated gate piece, prevent electric arc reignition, and then be favorable to electric arc to cool off in the explosion chamber and extinguish, through setting up dismouting mechanism, can be comparatively convenient quick change arc extinguishing bars piece.
Further, a strip-shaped groove is formed in one side wall of each side plate, and sliding strips sliding in the corresponding strip-shaped grooves are fixed on the arc-extinguishing grid pieces and the insulating grid pieces respectively, so that the arc-extinguishing grid pieces and the insulating grid pieces can slide on the side plates.
Further, the disassembly and assembly mechanism comprises a fixed plate fixed at the top of the top plate, a first spring is fixed on one side wall of the fixed plate, a movable plate slidably mounted at the top of the top plate is fixed at one end of the first spring, a guide rod is fixed at the top of the movable plate, a transverse plate is slidably mounted on the surface of the guide rod, a second spring sleeved on the outer side of the guide rod is fixed between the bottom of the transverse plate and the top of the movable plate, two connecting rods are rotatably mounted on one side wall of the movable plate, a movable block sliding at the top of the top plate is rotatably mounted at one end of each connecting rod, a fixed rod is fixed on one side wall of each movable block, a vertical plate sliding through the corresponding side plate is fixed at one end of each fixed rod, two notches are formed in the top of the top plate, a cylinder is fixed at the bottom of the transverse plate, and the first spring is arranged, the vertical plates can be kept in a state of fixing the grid sheet.
Furthermore, a first T-shaped sliding groove is formed in the top of the top plate, and a first T-shaped sliding block which slides in the first T-shaped sliding groove is fixed at the bottom of the moving plate, so that the moving plate can slide on the top plate.
Furthermore, round holes matched with the guide rods are formed in the transverse plates, so that the transverse plates can slide on the guide rods.
Furthermore, a second T-shaped sliding groove is formed in the top of the top plate, and a second T-shaped sliding block which slides in the second T-shaped sliding groove is fixed at the bottom of the moving block, so that the moving block can slide on the top plate.
Furthermore, a rectangular opening matched with the vertical plate is formed in the side plate, so that the vertical plate can slide on the side plate.
(III) advantageous effects
Compared with the prior art, the invention provides an arc extinguishing structure of a circuit breaker for power transmission, which has the following beneficial effects:
according to the invention, by arranging the insulating grid pieces, after the arc extinguishing grid pieces divide the arc voltage, the insulating grid pieces can prevent the arc from forming a guide pillar between the arc extinguishing grid pieces to cause short circuit of the arc extinguishing chamber, the voltage can be quickly segmented to prevent the arc from reigniting, and further the arc is favorably cooled and extinguished in the arc extinguishing chamber.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of the side plate of the present invention;
FIG. 3 is a schematic view of the structure of an arc extinguishing grid and an insulation grid according to the present invention;
FIG. 4 is an enlarged view taken at A in FIG. 1 according to the present invention;
FIG. 5 is a schematic diagram of a moving plate structure according to the present invention;
fig. 6 is a schematic view of a riser structure of the present invention.
In the figure: 1. a base; 2. a side plate; 3. a top plate; 4. a baffle plate; 5. arc extinguishing grid pieces; 6. an insulated gate plate; 7. a disassembly and assembly mechanism; 701. a fixing plate; 702. a first spring; 703. moving the plate; 704. a guide bar; 705. a transverse plate; 706. a second spring; 707. a connecting rod; 708. a moving block; 709. fixing the rod; 710. a vertical plate; 711. a notch; 712. a cylinder; 8. a strip-shaped groove; 9. a slide bar; 10. a first T-shaped chute; 11. a first T-shaped slider; 12. a circular hole; 13. a second T-shaped chute; 14. a second T-shaped slider; 15. a rectangular opening.
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.
Examples
As shown in fig. 1-6, an arc extinguishing structure of a circuit breaker for power transmission according to an embodiment of the present invention includes bases 1, side plates 2 are fixed on top portions of the two bases 1, a top plate 3 is fixed between top portions of the side plates 2, a baffle 4 is fixed on the top plate 3 and a side wall of the side plate 2, an arc extinguishing chamber is formed between the two side plates 2, the top plate 3 and the baffle 4, arc extinguishing grids 5 and an insulating grid 6 are slidably mounted on a side wall of the side plate 2, the arc extinguishing grids 5 and the insulating grid 6 are both obliquely arranged with respect to the bases 1, a detaching mechanism 7 for detaching and mounting the arc extinguishing grids 5 is mounted on the top plate 3, the arc extinguishing chamber is formed between the two side plates 2, the top plate 3 and the baffle 4, the bases 1 are mounted in the circuit breaker, so that the arc extinguishing grids 5 are obliquely arranged on one side of a moving contact and a static contact, the arc extinguishing grids 5 are longer in length due to the oblique arrangement, the contact area between the arc extinguishing grid 5 is increased, the time of moving and cooling of the electric arc on the arc-extinguishing grid plates 5 is increased, thereby improving the breaking capacity of the circuit breaker, when the circuit breaker breaks the current, the moving contact and the static contact are quickly separated by the operating mechanism under the action of electric repulsion force, the energy of the electric arc is quickly increased, the pressure of the arc-extinguishing chamber is increased, meanwhile, the electric arc is generated and elongated between the moving contact and the static contact, after the electric arc is quickly led to enter the arc-extinguishing chamber, the electric arc is divided into a plurality of short arcs by the arranged arc-extinguishing grid plates 5, the voltage of the electric arc is quickly increased due to the increase of the resistance, the electric arc is quickly cooled and extinguished in the arc-extinguishing grid plates 5, the insulating grid plates 6 can quickly assist the sectional voltage to prevent the electric arc from reigniting, thereby being beneficial to the cooling and extinguishing of the electric arc in the arc-extinguishing chamber, the possibility of the arc-extinguishing grid plates 5 being broken can be reduced, if the electric arc breaks down a certain arc-extinguishing grid plate 5, the arc-extinguishing grid plates 5 can be quickly replaced by the dismounting mechanism 7, the replacement operation is more convenient.
As shown in fig. 1, 2 and 3, in some embodiments, a strip-shaped groove 8 is formed in one side wall of each side plate 2, a sliding strip 9 sliding in the corresponding strip-shaped groove 8 is fixed on each arc-extinguishing grid 5 and each insulation grid 6, and the sliding strip 8 and the sliding strip 9 are arranged to limit the sliding of each arc-extinguishing grid 5.
As shown in fig. 4, in some embodiments, the detaching and attaching mechanism 7 includes a fixing plate 701 fixed on the top of the top plate 3, a first spring 702 is fixed on a side wall of the fixing plate 701, a moving plate 703 slidably mounted on the top of the top plate 3 is fixed on one end of the first spring 702, a guide rod 704 is fixed on the top of the moving plate 703, a horizontal plate 705 is slidably mounted on a surface of the guide rod 704, a second spring 706 sleeved on the outside of the guide rod 704 is fixed between the bottom of the horizontal plate 705 and the top of the moving plate 703, two connecting rods 707 are rotatably mounted on a side wall of the moving plate 703, a moving block 708 slidably mounted on the top of the top plate 3 is rotatably mounted on one end of the connecting rods 707, fixing rods 709 are fixed on a side wall of the moving block 708, a vertical plate 710 slidably penetrating through the corresponding side plate 2 is fixed on one end of the fixing rods 709, two notches 711 are formed on the top of the top plate 3, and a column 712 is fixed on the bottom of the horizontal plate 705, when the arc extinguishing device is replaced, the moving plate 703 is pulled, the cylinder 712 is inserted into the notch 711 under the action of the second spring 706, the moving plate 703 drives the connecting rod 707 to move, the connecting rod 707 drives the two moving blocks 708 to move towards two sides, the moving blocks 708 drive the fixing rods 709 to move, the fixing rods 709 drive the vertical plates 710 to move, the damaged arc extinguishing grid 5 can be pulled out, a new arc extinguishing grid 5 is inserted through the sliding strips 9 and the strip-shaped grooves 8, the transverse plate 705 is pulled, the transverse plate 705 drives the cylinder 712 to leave the notch 711, the vertical plates 710 return to the original position under the action of the first spring 702, the arc extinguishing grid 5 is fixed, and the operation is convenient.
As shown in fig. 4 and 5, in some embodiments, a first T-shaped sliding groove 10 is formed at the top of the top plate 3, a first T-shaped sliding block 11 sliding in the first T-shaped sliding groove 10 is fixed at the bottom of the moving plate 703, and the first T-shaped sliding groove 10 and the first T-shaped sliding block 11 are arranged to play a role in limiting the moving plate 703 in the moving process.
As shown in fig. 5, in some embodiments, a circular hole 12 matched with the guide bar 704 is formed in the horizontal plate 705, and the horizontal plate 705 can play a role in limiting during the movement process by providing the circular hole 12.
As shown in fig. 4 and 6, in some embodiments, a second T-shaped sliding groove 13 is formed in the top of the top plate 3, a second T-shaped sliding block 14 sliding in the second T-shaped sliding groove 13 is fixed at the bottom of the moving block 708, and the second T-shaped sliding groove 13 and the second T-shaped sliding block 14 are arranged to play a role in limiting during the movement of the moving block 708.
As shown in fig. 2, in some embodiments, the side plate 2 is provided with a rectangular opening 15 adapted to the vertical plate 710, and the rectangular opening 15 can limit the vertical plate 710 during movement.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a circuit breaker arc extinguishing structure for power transmission, includes base (1), its characterized in that: two the top of base (1) all is fixed with curb plate (2), be fixed with roof (3) between the top of curb plate (2), roof (3) are fixed with baffle (4) with a lateral wall of curb plate (2), two form the explosion chamber between curb plate (2), roof (3) and baffle (4), the equal slidable mounting of a lateral wall of curb plate (2) has arc extinguishing bars piece (5) and insulating bars piece (6), arc extinguishing bars piece (5) and insulating bars piece (6) homogeneous phase set up for base (1) slope, install dismouting mechanism (7) that are used for dismantling and install arc extinguishing bars piece (5) on roof (3).
2. An arc extinguishing structure of a circuit breaker for electric power transmission according to claim 1, characterized in that: a strip-shaped groove (8) is formed in one side wall of each side plate (2), and sliding strips (9) sliding in the corresponding strip-shaped grooves (8) are fixed on the arc extinguishing grid pieces (5) and the insulating grid pieces (6) respectively.
3. An arc extinguishing structure of a circuit breaker for electric power transmission according to claim 1, characterized in that: the disassembly and assembly mechanism (7) comprises a fixing plate (701) fixed at the top of the top plate (3), a side wall of the fixing plate (701) is fixed with a first spring (702), one end of the first spring (702) is fixed with a moving plate (703) slidably mounted at the top of the top plate (3), the top of the moving plate (703) is fixed with a guide rod (704), a transverse plate (705) is slidably mounted on the surface of the guide rod (704), a second spring (706) sleeved outside the guide rod (704) is fixed between the bottom of the transverse plate (705) and the top of the moving plate (703), two connecting rods (707) are rotatably mounted on one side wall of the moving plate (703), a moving block (708) sliding at the top of the top plate (3) is rotatably mounted at one end of the connecting rods (707), and a fixing rod (709) is fixed on one side wall of the moving block (708), one end of the fixing rod (709) is respectively fixed with a vertical plate (710) which penetrates through the corresponding side plate (2) in a sliding manner, the top of the top plate (3) is provided with two notches (711), and the bottom of the horizontal plate (705) is fixed with a cylinder (712).
4. An arc extinguishing structure of a circuit breaker for electric power transmission according to claim 3, characterized in that: the top of the top plate (3) is provided with a first T-shaped sliding groove (10), and the bottom of the moving plate (703) is fixed with a first T-shaped sliding block (11) which slides in the first T-shaped sliding groove (10).
5. An arc extinguishing structure of a circuit breaker for electric power transmission according to claim 3, characterized in that: and a round hole (12) matched with the guide rod (704) is formed in the transverse plate (705).
6. An arc extinguishing structure of a circuit breaker for electric power transmission according to claim 3, characterized in that: the top of the top plate (3) is provided with a second T-shaped sliding groove (13), and the bottom of the moving block (708) is fixed with a second T-shaped sliding block (14) which slides in the second T-shaped sliding groove (13).
7. An arc extinguishing structure of a circuit breaker for electric power transmission according to claim 3, characterized in that: the side plate (2) is provided with a rectangular opening (15) matched with the vertical plate (710).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111309582.8A CN114141593A (en) | 2021-11-06 | 2021-11-06 | Arc extinguishing structure of circuit breaker for power transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111309582.8A CN114141593A (en) | 2021-11-06 | 2021-11-06 | Arc extinguishing structure of circuit breaker for power transmission |
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| Publication Number | Publication Date |
|---|---|
| CN114141593A true CN114141593A (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111309582.8A Pending CN114141593A (en) | 2021-11-06 | 2021-11-06 | Arc extinguishing structure of circuit breaker for power transmission |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116978742A (en) * | 2023-08-14 | 2023-10-31 | 杭州天卓网络有限公司 | Intelligent circuit breaker based on plug-in connection of Internet of things and application method thereof |
-
2021
- 2021-11-06 CN CN202111309582.8A patent/CN114141593A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116978742A (en) * | 2023-08-14 | 2023-10-31 | 杭州天卓网络有限公司 | Intelligent circuit breaker based on plug-in connection of Internet of things and application method thereof |
| CN116978742B (en) * | 2023-08-14 | 2024-02-13 | 杭州天卓网络有限公司 | Intelligent circuit breaker based on plug-in connection of Internet of things and application method thereof |
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