CN212342566U - Arc control device and circuit breaker - Google Patents

Abstract

The utility model relates to an arc control device and circuit breaker, a casing for setting up at the circuit breaker, including the explosion chamber, the explosion chamber sets up in the arc extinguishing chamber, the arc extinguishing chamber is including enclosing the first run-on plate at the explosion chamber upside and enclosing the second run-on plate at the explosion chamber downside, the right-hand member of explosion chamber is enclosed there is the back arc baffle, the second run-on plate upwards buckles with the planar nodical department of explosion chamber front end, it is triangle-shaped's cavity to form upside open-ended cross-section in the left casing of explosion chamber, two cross-sections of symmetry are triangle-shaped's current conducting plate around being provided with in the cavity, the symmetry is provided with two gas production between two current conducting plates and moulds the board, second run-. The upper side and the lower side of the arc extinguishing chamber are provided with arc striking plates, and the arc driven contacts can be quickly led to the self structure of the arc extinguishing chamber, so that the purpose of improving the breaking capacity of the circuit breaker is achieved, the arc striking capacity of the arc extinguishing chamber is improved, the overflow and leakage of electric arcs are reduced, and the use safety of moving and fixed contacts of the circuit breaker is guaranteed.

Description

Arc control device and circuit breaker

Technical Field

The utility model relates to a circuit breaker technical field, especially an arc control device and circuit breaker.

Background

The circuit breaker is an important part in a distribution electrical appliance, and is used for an industrial low-voltage power system for connecting and disconnecting current in a power grid circuit and protecting a line and power supply equipment from damage caused by faults such as 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 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 movable contact and the fixed contact of the circuit breaker are quickly disconnected, and at the moment, the air medium is discharged due to the voltage between the movable contact and the fixed contact, so that high-temperature electric arc is generated. The arc causes a sharp rise in the air temperature inside the arc extinguishing device during the combustion process, thereby accelerating the ionization of the air. On the other hand, the electric arc is divided into a plurality of short arcs by a plurality of arc isolating grid pieces 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 the metal arc isolating pieces, the electric arc is reduced, the voltage is rapidly increased, and the electric arc is extinguished. The arc extinguish chamber of current circuit breaker introduces the high temperature electric arc that the arcing plate will move the contact disconnection and discharge and produce through the striking plate and extinguishes, and present traditional striking plate simple structure leads to the striking plate not good to the striking effect of electric arc, produces the emergence of electric arc overflow hourglass phenomenon easily, can burn out circuit breaker moving contact when serious.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model aims at providing an arc control device and circuit breaker through placing the explosion chamber in the arc extinguishing chamber, reduces the excessive hourglass of electric arc, has guaranteed the security that the sound contact of circuit breaker used.

The embodiment of the utility model provides an in adopt following scheme to realize: provides an arc extinguishing device which is arranged in a shell of a circuit breaker and comprises an arc extinguishing chamber, wherein the arc extinguishing chamber comprises a left arc-isolating plate, a right arc-isolating plate and an arc extinguishing grid sheet arranged between the left arc-isolating plate and the right arc-isolating plate, the arc extinguishing chamber is arranged in the arc extinguishing chamber, the arc extinguishing chamber comprises a first arc striking plate surrounding the upper side of the arc extinguishing chamber and a second arc striking plate surrounding the lower side of the arc extinguishing chamber, a rear arc isolating plate is surrounded at the right end of the arc extinguishing chamber, and is connected with the right ends of the left arc-isolating plate and the right arc-isolating plate, the intersection point of the second arc-striking plate and the plane of the front end of the arc-extinguishing chamber is bent upwards, the arc extinguishing chamber is characterized in that a cavity with an upper side opening and a triangular cross section is formed in the shell on the left side of the arc extinguishing chamber, two conducting plates with triangular cross sections are symmetrically arranged in the cavity, two gas generating plastic plates are symmetrically arranged between the two conducting plates, and the second arc striking plate is clamped between the two gas generating plastic plates.

The utility model relates to an embodiment, back flash barrier with left flash barrier right flash barrier integrated into one piece.

In an embodiment of the present invention, the second striking plate left portion is provided with a silver point.

There is provided a circuit breaker including a housing and an arc extinguishing device of any of the preceding embodiments.

The utility model has the advantages that: the utility model provides an arc control device, through arranging the explosion chamber in the arc extinguishing chamber, and seal the right-hand member of explosion chamber with back arc-insulating board, such structure can increase the leakproofness of arc extinguishing cavity, and because the cavity adopts metal magnetotherapy, can increase gaseous flow, form the arc blowing, make the arc guide ability of cavity increase, on this basis, set up the silver point between producing the gas and moulding the board, make the rate of motion of electric arc faster, reach quick arc extinguishing, compare with traditional arc control device, the directionality of arc light is better, evenly get into the explosion chamber. The upper side and the lower side of the arc extinguishing chamber are provided with arc striking plates, and the arc driven contacts can be quickly led to the self structure of the arc extinguishing chamber, so that the purpose of improving the breaking capacity of the circuit breaker is achieved, the arc striking capacity of the arc extinguishing chamber is improved, the overflow and leakage of electric arcs are reduced, and the use safety of moving and fixed contacts of the circuit breaker is guaranteed.

Drawings

Fig. 1 is a schematic view of an arc extinguishing device.

Fig. 2 is a partial sectional view of fig. 1.

Fig. 3 is a schematic view of an arc extinguishing device disposed within a circuit breaker.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1 to 3, the present invention provides an arc extinguishing apparatus, which is disposed in a housing 1 of a circuit breaker, and includes an arc extinguishing chamber 122, wherein the arc extinguishing chamber 122 includes a left arc-isolating plate 1221, a right arc-isolating plate 1223, and an arc-extinguishing grid 1222 installed between the left arc-isolating plate 1221 and the right arc-isolating plate 1223, the arc extinguishing chamber 122 is disposed in an arc extinguishing chamber, the arc extinguishing chamber includes a first arc-striking plate 123 surrounding an upper side of the arc extinguishing chamber 122 and a second arc-striking plate 124 surrounding a lower side of the arc extinguishing chamber 122, a rear arc-isolating plate 126 is surrounded at a right end of the arc extinguishing chamber 122 and connected to right and left arc-isolating plates 1221, 1223, an intersection point of the second arc-striking plate 124 and a front plane of the arc extinguishing chamber is bent upward, a cavity with an upper opening in a left side of the arc extinguishing chamber 122 is formed, two conductive plates 121 with a triangular cross section are disposed in the cavity, and are symmetrical, two gas-generating plastic plates 125 are symmetrically arranged between the two conductive plates 121, and the left part of the second arc ignition plate 124 is positioned between the two gas-generating plastic plates 125; adopt the structure that the metalwork fully surrounds to form the arc extinguishing chamber, can increase the leakproofness of explosion chamber 122, first run-on board 123, second run-on board 124, current-conducting plate 121 are metal magnetism material, can increase the flow of gas, form the arc blowing, make the arc guide ability of cavity increase, it makes the moving speed of electric arc faster to set up gas production plastic plate 125, reach quick arc extinguishing, compare with traditional arc control device, the directionality of arc light is better, evenly gets into explosion chamber 122.

Referring to fig. 1 and 2, in an embodiment of the present invention, the rear arc-isolating plate 126, the left arc-isolating plate 1221, and the right arc-isolating plate 1223 are integrally formed, which is helpful for achieving better sealing performance.

Referring to fig. 1 and 3, in an embodiment of the present invention, a silver dot 11 is disposed on a left portion of the second arc striking plate 124 for contacting with a moving contact of the switching module 2.

Referring to fig. 1 to 3, a circuit breaker is provided, which includes a housing 1 and an arc extinguishing device according to any one of the foregoing embodiments.

Referring to fig. 1 to 3, in an embodiment of the present invention, the circuit breaker further includes an indication module 4, an unlocking member 13, a positioning member 14, a driving module 3, a switching module 2, a thermal trip assembly 7, a connection terminal 9, and a magnetic attraction module 10. Button 4 and the cooperation of unblocking piece 13, setting element 14 are used for cooperating with the frame, driving machine module, magnetism inhale module, heat unhook subassembly with divide-shut brake module cooperation. When the thermal trip assembly is used, when the bimetallic strip 71 of the thermal trip assembly is overloaded and generates heat, the bimetallic strip is bent upwards, the left end of the bimetallic strip 71 moves upwards to drive the bimetallic pull rod 75 to move, the opening and closing module 2 is further provided to rotate anticlockwise to trip, after the opening and closing module 2 is tripped, the moving contact on the opening and closing module is disconnected with the silver point 11, the current is cut off, and after the circuit is disconnected, the bimetallic strip 71 slowly resets to the position before tripping along with the reduction of the temperature. During the use, when unlocking piece 13 bulges casing 1, unlocking piece 13 supports the button, can not operating button closed circuit breaker, when pressing unlocking piece 13, can operating button. When the positioning part 14 protrudes out of the shell 1, the circuit breaker can be fastened with a machine frame to fix the circuit breaker, after the circuit breaker is disconnected, the button is pulled outwards, the fastener can be retracted into the shell 1, and the circuit breaker can be taken out from the machine frame. And electric arcs cannot be generated between the wiring end of the circuit breaker and the bus bar, so that the safety of equipment is ensured. Only through unlocking piece 13 can realize the unblock, further ensured the security of circuit breaker. The end part of the wiring terminal 9 is in transmission connection with the opening and closing module 2 through the magnetic suction module 10.

The utility model discloses the theory of operation below has:

through arranging the explosion chamber in the arc extinguishing chamber to seal the right-hand member of explosion chamber with the back arc-isolating plate, the leakproofness of arc extinguishing chamber can be increased to such structure, and because the cavity adopts metal magnetotherapy, it can play the flow that increases gas according to physical characteristic, thereby form the arc blowing, make the arc guide ability in arc extinguishing chamber increase, set up silver point (being the static contact) between the gas production plastic plate, make the moving speed of electric arc faster, the directionality of arc light is better, evenly gets into the explosion chamber. The upper side and the lower side of the arc extinguishing chamber are provided with arc striking plates, and the arc driven contacts can be quickly led to the self structure of the arc extinguishing chamber, so that the purpose of improving the breaking capacity of the circuit breaker is achieved, the arc striking capacity of the arc extinguishing chamber is improved, the overflow and leakage of electric arcs are reduced, and the use safety of moving and fixed contacts of the circuit breaker is guaranteed.

The above description is only for the preferred embodiment of the present invention, and should not be interpreted as limiting the scope of the present invention, which is intended to cover all the equivalent changes and modifications made in accordance with the claims of the present invention.

Claims (4)

1. The utility model provides an arc control device for set up in the casing of circuit breaker, including the explosion chamber, the explosion chamber includes left flash barrier, right flash barrier and installs the arc extinguishing bars piece between left flash barrier, right flash barrier, its characterized in that: the arc extinguishing chamber is arranged in the arc extinguishing chamber, the arc extinguishing chamber comprises a first arc striking plate and a second arc striking plate, the first arc striking plate surrounds the upper side of the arc extinguishing chamber, the second arc striking plate surrounds the lower side of the arc extinguishing chamber, and a rear arc isolating plate surrounds the right end of the arc extinguishing chamber and is connected with the right ends of the left arc isolating plate and the right arc isolating plate; the department of the second run-on plate and the planar nodical department of explosion chamber front end upwards buckles form upside open-ended cross-section for triangular cavity in the left casing of explosion chamber, two cross-sections of symmetry are triangular current conducting plate, two around being provided with in the cavity the symmetry is provided with two and produces gas between the current conducting plate and moulds the board, the second run-on plate clamp is two produce gas and mould between the board.

2. An arc extinguishing device according to claim 1, characterized in that: the rear arc isolating plate, the left arc isolating plate and the right arc isolating plate are integrally formed.

3. An arc extinguishing device according to claim 1, characterized in that: and a silver point is arranged at the left part of the second arc striking plate.

4. A circuit breaker, characterized by: the circuit breaker includes a housing and the arc extinguishing device of any of claims 1-3.

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