CN220189469U

CN220189469U - Arc extinguishing device of circuit breaker

Info

Publication number: CN220189469U
Application number: CN202321072105.9U
Authority: CN
Inventors: 车伟; 张进
Original assignee: Anhui Saichi Industrial Control Technology Co ltd
Current assignee: Anhui Saichi Industrial Control Technology Co ltd
Priority date: 2023-05-05
Filing date: 2023-05-05
Publication date: 2023-12-15
Anticipated expiration: 2033-05-05

Abstract

The utility model discloses an arc extinguishing device of a circuit breaker, which comprises a fixed ring, wherein the upper end and the lower end of the fixed ring are respectively and fixedly connected with a sealing end plate, and an arc extinguishing assembly and an inflation assembly are arranged in the fixed ring. The arc extinguishing component can directly change the thick arc generated by the separation of the contacts of the original circuit breaker into the tiny arc with negligible influence, directly replaces the existing arc grid, not only reduces the volume of the circuit breaker, but also directly blends the arc grid structure into a circuit of the circuit breaker, has higher reaction speed and can eliminate the arc more safely and rapidly; the inflation assembly can reduce the oxidation of the arc to the inner wall of the arc-extinguishing chamber through SF6, when the circuit breaker circuit is continuously connected, the conducting rod is restored to the position, the air bags are synchronously pushed to expand, the gas in the arc-extinguishing chamber is sucked, and the recycling of SF6 is realized.

Description

Arc extinguishing device of circuit breaker

Technical Field

The utility model relates to the field of circuit breakers, in particular to an arc extinguishing device of a circuit breaker.

Background

The circuit breaker is an important part in the distribution electrical equipment, is mainly used for an industrial low-voltage power system, and is used for switching on and off current in a power grid circuit and protecting a circuit and power supply equipment from damage caused by faults such as overload, undervoltage, short circuit, single-phase grounding and the like. The breaking function of the circuit breaker for overload or short-circuit current is mainly completed through an arc extinguishing chamber arranged in the circuit breaker. When fault current occurs in the circuit and the current value exceeds the set protection range of the circuit breaker, the tripping 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.

Through the mass retrieval, found that prior art publication number is CN 108735537A, disclosed a circuit breaker arc extinguishing device, including arc extinguishing bars piece group, arc extinguishing support, insulating arc shield, its characterized in that: the inner side wall of the foot part of the arc extinguishing grid sheet group arranged in the insulating arc isolation cover is provided with a plurality of concave-convex grooves.

Therefore, based on the searching and combining the existing circuit breaker arc extinguishing structure, the arc extinguishing grating is adopted to change the thick arc into the tiny arc, but in the circuit breaker, the arc extinguishing grating has large volume and large occupied space, and the tiny arc is generated to cause oxidation of the arc extinguishing grating, so that the arc extinguishing effect of the arc extinguishing grating is influenced under the long-time condition.

Disclosure of Invention

The utility model aims to provide an arc extinguishing device of a circuit breaker, which solves the problems in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a circuit breaker arc extinguishing device, includes solid fixed ring, gu fixed ring's upper and lower end fixedly connected with seal end plate respectively, gu install arc extinguishing subassembly and inflation subassembly in the fixed ring, arc extinguishing subassembly includes arc and connects the electric piece, arc connects between the seal end plate of electric piece fixed ring and below, arc connects the electric piece to be connected with a plurality of electric pieces, it is located solid fixed ring to connect the electric piece, gu the outside of fixed ring is through wiring bolt fixedly connected with electric pressing block, connect electric pressing block and arc to connect electric piece butt, transversely rotate in the solid fixed ring and install the conducting rod, the conducting rod right-hand member is connected with the magnetic plate, the below of magnetic plate is provided with the coil, the tip and the coil of conducting rod are connected, the surface cover of conducting rod is equipped with a plurality of rotating pieces, the fixed electric shock head that is provided with of surface butt of rotating piece, electric shock head and electric piece.

Preferably, a baffle plate is arranged in the fixing ring, a transparent toughened plate is arranged at the center of the upper and lower sealing end plates of the fixing ring, and an arc extinguishing chamber is arranged between the fixing ring and the upper and lower sealing end plates.

Preferably, the inflation assembly comprises an air bag, the air bag is arranged on one side of a baffle plate in a fixing ring, an air inlet pipe is connected between the upper end of the air bag and an arc extinguish chamber, connecting plates are fixedly sleeved at two ends of a conducting rod, a cross rod is connected between the lower ends of the connecting plates at the left side and the right side, pull rods are sleeved on the outer surfaces of the front side and the rear side of the cross rod, the upper ends of the pull rods are connected with the inner top of the air bag, and SF6 gas is filled in the air bag.

Preferably, the upper surface of the electric contact piece is provided with a plurality of grooves, and the electric shock head corresponds to the grooves on the electric contact piece.

Preferably, the end faces of the opposite sides of the fixing ring and the sealing end plates on the upper side and the lower side of the fixing ring are provided with annular sealing rubber rings.

Compared with the prior art, the utility model has the beneficial effects that:

1. the device can directly change the thick arc generated by the separation of the contacts of the original breaker into tiny arc with negligible influence, directly replace the existing arc grid, not only reduce the volume of the breaker, but also directly integrate the arc grid structure into a circuit of the breaker, has higher reaction speed and can eliminate the arc more safely and rapidly;

2. when a short circuit occurs, the conducting rod and the rotating piece on the surface thereof rotate along with the rotating piece, the connecting plate at the end part of the conducting rod also synchronously rotates, the cross rod at the end part of the connecting plate synchronously rotates, the pull rod on the surface of the cross rod synchronously rotates and moves downwards, the downwards moving pull rod pulls the upper surface of the air bag to move downwards, so that the air bag is compressed, the filled SF6 gas in the air bag is compressed into the arc extinguishing chamber, oxidation of the electric arc on the inner wall of the arc extinguishing chamber can be reduced through SF6, when the circuit breaker is continuously connected, the conducting rod restores the position, synchronously pushes the air bag to expand, and the gas in the arc extinguishing chamber is sucked, so that the recycling of SF6 is realized;

3. the fixed ring and the end face of the opposite side of the sealing end plate on the upper side and the lower side of the fixed ring are provided with annular sealing rubber rings, so that the tightness of the arc extinguishing chamber is ensured, SF6 leakage is avoided, and the arc extinguishing structure in the fixed ring can be protected.

Drawings

Fig. 1 is a schematic view of a three-dimensional structure before arc extinction of the present utility model;

FIG. 2 is a schematic view of a fixing ring according to the present utility model;

fig. 3 is a schematic view of an arc extinguishing assembly according to the present utility model;

fig. 4 is a schematic view of an arc extinguishing perspective structure of the present utility model.

In the figure: 1. an arc extinguishing assembly; 2. a sealing end plate; 3. a wiring bolt; 4. a power connection sheet; 5. a fixing ring; 6. arc-shaped power connection sheets; 7. an inflation assembly; 8. an arc extinguishing chamber; 9. an air inlet pipe; 10. an air bag; 11. a partition plate; 12. a rotary piece; 13. an electric shock head; 14. a power connection sheet; 15. a magnetic plate; 16. a coil; 17. a connecting plate; 18. a conductive rod; 19. a pull rod; 20. a cross bar.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples: referring to fig. 1-4, an arc extinguishing device of a circuit breaker comprises a fixed ring 5, wherein the upper end and the lower end of the fixed ring 5 are respectively and fixedly connected with a sealing end plate 2, an arc extinguishing component 1 and an inflating component 7 are arranged in the fixed ring 5 and used for arc extinguishing, the arc extinguishing component 1 comprises an arc-shaped power receiving piece 6, the arc-shaped power receiving piece 6 is fixed between the fixed ring 5 and the sealing end plate 2 below, the arc-shaped power receiving piece 6 is connected with a plurality of power receiving pieces 14, the power receiving pieces 14 are positioned in the fixed ring 5, the outer side of the fixed ring 5 is fixedly connected with a power receiving block 4 through a wiring bolt 3, the power receiving block 4 is abutted against the arc-shaped power receiving piece 6, the power receiving block 4 is one of the power receiving ends of the whole arc extinguishing device, a conducting rod 18 is transversely arranged in the fixed ring 5 in a rotating way, the right end of the conducting rod 18 is connected with a magnetic plate 15, a coil 16 is arranged below the magnetic plate 15, the end of the conducting rod 18 is connected with the coil 16, the coil 16 is the other power receiving end of the arc extinguishing device, the outer surface of the conducting rod 18 is sleeved with a plurality of rotating plates 12, the surface of the rotating plate 12 is fixedly provided with a plurality of electric shock heads 13, the electric shock heads 13 are abutted against the surfaces of the electric contact plates 14, namely, in the whole circuit breaker arc extinguishing device, a complete loop is formed by the coil 16, the conducting rod 18, the rotating plate 12, the electric shock heads 13, the electric contact plates 14, the arc-shaped electric contact plates 6 and the electric contact plates 4, under the normal operating condition of the circuit breaker, the magnetic plate 15 is positioned on the upper surface of the coil 16, at the moment, the electric shock heads 13 on the rotating plate 12 are abutted against the electric contact plates 14, the loop is communicated, if the circuit breaker is short-circuited, the current in the coil 16 is suddenly increased, the generated magnetic field is enhanced, the magnetic plate 15 is rapidly pushed away, the conducting rod 18 and the rotating plate 12 on the surface thereof rotate along, the electric shock heads 13 on the rotating plate 12 are separated from the electric contact plates 14, because the electric shock head 13 is provided with a plurality of electric shock heads, the electric shock head 13 and the electric connection piece 14 are separated, so that a thick arc generated by the original separation of the breaker contacts can be directly changed into a tiny arc with negligible influence, the existing arc grid is directly replaced, the volume of the breaker is reduced, and the arc grid structure is directly integrated into a circuit of the breaker, so that the reaction speed is higher, and the arc can be safely and rapidly eliminated.

Furthermore, the baffle plate 11 is arranged in the fixed ring 5, the transparent toughened plate is arranged in the center of the upper and lower sealing end plates 2 of the fixed ring 5, the arc extinguishing chamber 8 is arranged between the fixed ring 5 and the upper and lower sealing end plates 2 of the fixed ring, the arc extinguishing chamber 8 is of a sealing structure, the inflatable module 7 comprises an air bag 10, the air bag 10 is arranged on one side of the baffle plate 11 in the fixed ring 5, the air inlet pipe 9 is connected between the upper end of the air bag 10 and the arc extinguishing chamber 8, the connecting plates 17 are fixedly sleeved at the two ends of the conducting rod 18, the cross rods 20 are connected between the lower ends of the connecting plates 17 at the left and right sides, the outer surfaces of the cross rods 20 are sleeved with the pull rods 19, the upper ends of the pull rods 19 are connected with the inner top of the air bag 10, SF6 gas is filled in the air bag 10, therefore, when a short circuit occurs, the conducting rod 18 and the rotating plates 12 on the surfaces of the conducting rod 18 rotate along with the inner surfaces of the conducting rod, the cross rods 20 synchronously rotate, the lower moving down the pull rods 19 pull the upper surfaces of the air bag 10, the SF6 is compressed, the SF6 is continuously sucked into the air chamber 8 by the air circuit 8, and the SF6 is continuously compressed, and the SF6 is continuously sucked into the position of the air chamber 8 when the SF6 is continuously, and the SF6 is continuously compressed and the circuit is recovered.

Further, the upper surface of the electric contact piece 14 in the utility model is provided with a plurality of grooves, the electric shock head 13 corresponds to the grooves on the electric contact piece 14, and when the electric shock head 13 is separated from the electric contact piece 14, tiny electric arcs are generated between the electric shock head 13 and the ends of the grooves.

Furthermore, the end faces of the fixing ring 5 and the opposite side of the sealing end plate 2 on the upper side and the lower side of the fixing ring are provided with annular sealing rubber rings, so that the tightness of the arc extinguishing chamber 8 is ensured, SF6 leakage is avoided, and an arc extinguishing structure in the fixing ring is protected.

In summary, the application principle of the utility model is as follows: in the whole arc extinguishing device of the circuit breaker, a complete loop is formed by a coil 16, a conducting rod 18, a rotating sheet 12, an electric shock head 13, an electric contact sheet 14, an arc-shaped electric contact sheet 6 and an electric contact block 4, under the normal operating condition of the circuit breaker, a magnetic plate 15 is positioned on the upper surface of the coil 16, a plurality of electric shock heads 13 on the rotating sheet 12 are abutted against the electric contact sheet 14 at the moment, the loop is communicated, if the circuit breaker is in short circuit, the current in the coil 16 is suddenly increased, the generated magnetic field is enhanced, the magnetic plate 15 is rapidly pushed away, in the process, the conducting rod 18 and the rotating sheet 12 on the surface thereof rotate along with the conducting rod, and a plurality of electric shock heads 13 on the rotating sheet 12 are separated from the electric contact sheet 14, and as the electric shock heads 13 are arranged in a plurality of the circuit breaker, the separation of the electric shock heads 13 and the electric contact sheet 14 can directly change the thick and strong electric arcs generated by the original circuit breaker contact separation into tiny arcs with negligible influence, the existing arc grids are directly replaced, the volume of the circuit breaker is not only reduced, the volume of the circuit breaker is ensured, the arc structures are directly introduced into the circuit breaker, the speed is safer, and the circuit breaker can be more safe, and the arc can be melted more quickly;

when a short circuit occurs, the conducting rod 18 and the rotating piece 12 on the surface thereof rotate along with the conducting rod, the connecting plate 17 at the end part of the conducting rod 18 also synchronously rotates, the cross rod 20 at the end part of the connecting plate 17 synchronously rotates, the pull rod 19 on the surface of the cross rod 20 synchronously rotates and moves downwards, the lower pull rod 19 pulls the upper surface of the air bag 10 to move downwards, the air bag 10 is compressed, the filled SF6 gas in the air bag is compressed into the arc extinguishing chamber 8, oxidation of the electric arc on the inner wall of the arc extinguishing chamber 8 can be reduced through SF6, and when a circuit breaker circuit is continuously connected, the conducting rod 18 restores the position, synchronously pushes the air bag 10 to expand, and the gas in the arc extinguishing chamber 8 is sucked, so that the recycling of the SF6 is realized.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The utility model provides a circuit breaker arc extinguishing device, includes solid fixed ring (5), its characterized in that: the utility model discloses a fixed ring, including fixed ring (5) and fixed ring, fixed ring (5) are fixed with sealed end plate (2) respectively, install arc extinguishing subassembly (1) and inflation subassembly (7) in fixed ring (5), arc extinguishing subassembly (1) are including arc contact electric piece (6), arc contact electric piece (6) are fixed in between fixed ring (5) and sealed end plate (2) of below, arc contact electric piece (6) are connected with a plurality of contact electric pieces (14), contact electric piece (14) are located fixed ring (5), the outside of fixed ring (5) is through wiring bolt (3) fixedly connected with contact electric piece (4), contact electric piece (4) and arc contact electric piece (6) butt, transversely rotate in fixed ring (5) and install conducting rod (18), conducting rod (18) right-hand member is connected with magnetic plate (15), the below of magnetic plate (15) is provided with coil (16), the tip and the coil (16) of conducting rod (18) are connected, conducting rod (18) are equipped with rotation piece (12) and a plurality of electric shock surface (13) of contact electric contact pieces (13).

2. The circuit breaker arc extinguishing device of claim 1, wherein: the novel high-voltage arc extinguishing device is characterized in that a baffle plate (11) is arranged in the fixed ring (5), a transparent toughened plate is arranged in the center of the upper and lower sealing end plates (2) of the fixed ring (5), and an arc extinguishing chamber (8) is arranged between the fixed ring (5) and the sealing end plates (2) on the upper and lower sides of the fixed ring.

3. The circuit breaker arc extinguishing device of claim 2, wherein: the inflatable module (7) comprises an air bag (10), the air bag (10) is arranged on one side of a baffle plate (11) in a fixed ring (5), an air inlet pipe (9) is connected between the upper end of the air bag (10) and an arc extinguishing chamber (8), connecting plates (17) are fixedly sleeved at two ends of a conducting rod (18), a cross rod (20) is connected between the lower ends of the connecting plates (17) at the left side and the right side, a pull rod (19) is sleeved on the outer surface of the front side and the rear side of the cross rod (20), the upper end of the pull rod (19) is connected with the inner top of the air bag (10), and SF6 gas is filled in the air bag (10).

4. A circuit breaker arc extinguishing apparatus according to claim 3, characterized in that: the upper surface of the electric contact piece (14) is provided with a plurality of grooves, and the electric shock head (13) corresponds to the grooves on the electric contact piece (14).

5. The circuit breaker arc extinguishing device of claim 4 wherein: the end faces of the fixing ring (5) and the opposite side of the sealing end plate (2) on the upper side and the lower side of the fixing ring are provided with annular sealing rubber rings.