CN217485397U

CN217485397U - Circuit breaker contact arc extinguishing module

Info

Publication number: CN217485397U
Application number: CN202121475668.3U
Authority: CN
Inventors: 王海良; 柴刚强; 龚成相
Original assignee: Minpu Electric Group Co ltd
Current assignee: Minpu Electric Group Co ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-09-23
Anticipated expiration: 2031-06-30

Abstract

The utility model relates to a circuit breaker contact arc extinguishing module, including contact frame, moving contact, static contact, explosion chamber subassembly, the one end of static contact is bent to explosion chamber subassembly orientation and is extended and form the contact site, is provided with the stationary contact on this contact site, the other end of static contact the wiring portion has, the explosion chamber subassembly including set up at the striking piece, set up contact guard shield on the static contact, set up explosion chamber on the contact guard shield, set up the guard shield on the explosion chamber, striking piece block between contact and static contact, striking piece on have two increase magnetic sheets that extend outside the contact guard shield, two increase the magnetic sheet and bend respectively and extend in the both sides of contact guard shield, explosion chamber, the striking piece is gone up to correspond the static contact department and is provided with the striking angle, the afterbody of this striking angle is bent and is extended in the arc extinguishing chamber. The utility model has the advantages of simple structure, dependable performance are stable in performance, the assembly is convenient, can effectively prolong circuit breaker life, improve the circuit breaker breaking capacity.

Description

Circuit breaker contact arc extinguishing module

Technical Field

The utility model relates to a circuit breaker technical field, concretely relates to circuit breaker contact arc extinguishing module.

Background

The plastic case circuit breaker is a commonly used protective electric appliance, has the functions of switching on and off load current and protecting overload and short circuit of the load current, and is widely applied to overload and short circuit protection of various power distribution systems and motors. Moulded case circuit breaker includes casing, operating device, contact system, arc extinguishing system, and moulded case circuit breaker includes plastic casing, operating device, contact system, arc extinguishing system, and current moulded case circuit breaker's arc extinguishing system structural design is unreasonable, and the structural design of arc extinguishing system can not integrated modularization, and it is convenient inadequately to assemble, and current arc extinguishing system's arc extinguishing effect is unsatisfactory, and the contact is burnt and is lost easily to this moulded case circuit breaker's breaking capacity is lower.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a simple structure, stable performance are reliable, the assembly is convenient, can effectively prolong circuit breaker life, improve the circuit breaker breaking capacity's circuit breaker contact arc extinguishing module.

In order to achieve the purpose, the utility model discloses a circuit breaker contact arc extinguishing module, which comprises a contact holder, a moving contact, a static contact and an arc extinguishing chamber component, wherein the moving contact is arranged on the contact holder in a linkage manner, the static contact is matched with the moving contact, the arc extinguishing chamber component is arranged on the static contact, one end of the static contact is bent towards the arc extinguishing chamber component and extends to form a contact part, a static contact is arranged on the contact part, the other end of the static contact is provided with a wiring part, the arc extinguishing chamber component comprises an arc striking piece, a contact shield, an arc extinguishing chamber and a shield, the arc extinguishing chamber is arranged on the contact shield, the shield is arranged on the arc extinguishing chamber, the arc striking piece is clamped between the contact part and the static contact, the arc striking piece is provided with two magnetic sheets extending outside the contact shield, the two magnetic sheets are respectively bent and extend at two sides of the contact shield and the arc extinguishing chamber, and an arc striking angle is arranged on the arc striking piece corresponding to the static contact point, the tail part of the arc striking angle is bent and extends in the arc extinguishing chamber.

The arc extinguishing chamber assembly has the advantages that the arc extinguishing chamber assembly is of a closed magnetic quenching structure, the arc striking piece is provided with the two semi-closed structure-designed magnetic increasing sheets, a larger magnetic field can be generated, the contact part of the static contact is located between the two magnetic increasing sheets, so that electric arcs can be blown into the arc extinguishing chamber, and arc striking angles on the arc striking piece can rapidly introduce the electric arcs into the arc extinguishing chamber, so that the arc extinguishing capacity is improved. Therefore, the contact arc extinguishing module has the advantages of simple structure, stable and reliable performance, convenience and quickness in assembly, capability of effectively prolonging the service life of the circuit breaker and improving the breaking capacity of the circuit breaker.

Particularly, the contact shield is provided with an insulating plate on each of two sides corresponding to the contact portion, a containing cavity is formed between the two insulating plates, the contact portion is arranged in the containing cavity, one end of the contact shield is provided with an insulating guide sheet attached to the fixed contact, one end of the insulating guide sheet is bent and extends into the arc extinguishing chamber, and an arc guide channel is formed between the insulating guide sheet and the two arc barriers of the arc extinguishing chamber. The insulating guide sheet can rapidly introduce the electric arc in the accommodating cavity into the arc extinguishing chamber, so that the purpose of rapid arc extinguishing can be achieved, and the arc extinguishing effect of the contact arc extinguishing module can be improved.

Particularly, the two insulation plates of the contact shield are respectively provided with a clamping groove corresponding to the two arc isolating plates, and the two arc isolating plates of the arc extinguish chamber are respectively clamped in the clamping grooves and form clamping matching of the arc extinguish chamber and the contact shield. The contact protection cover is connected with the arc extinguish chamber in a clamping matching mode, so that the contact protection cover and the arc extinguish chamber can be assembled conveniently, and the assembly efficiency of the contact arc extinguish module can be improved.

Particularly, an arc isolating shield is arranged on one side of the movable contact corresponding to the movable contact, and one end of the arc isolating shield extends into the contact holder. The arc separation protective cover can play a role in cutting off the electric arc, and the electric arc can be prevented from jumping into the contact frame along the moving contact, so that the arc extinguishing effect of the contact arc extinguishing module can be improved.

Particularly, the arc-isolating protective cover is provided with a clamping groove matched with the moving contact, the clamping groove is clamped on the moving contact, a boss is arranged in the clamping groove, the moving contact is provided with a clamping hole matched with the boss, and the boss is clamped in the clamping hole and forms clamping matching of the arc-isolating protective cover and the moving contact. The arc isolation shield is connected with the moving contact in a clamping fit mode, so that the arc isolation shield and the moving contact are convenient to assemble, and the assembly efficiency of the contact arc extinguishing module is improved.

Drawings

Fig. 1 is a perspective view of an embodiment of the present invention.

Fig. 2 is a cross-sectional view of an embodiment of the present invention.

Fig. 3 is a perspective view of an arc striking member according to an embodiment of the present invention.

Fig. 4 is a perspective view of a contact shield according to an embodiment of the present invention.

Fig. 5 is a perspective view of the arc-isolating shield according to the embodiment of the present invention.

Detailed Description

As shown in fig. 1-5, an embodiment of the present invention is a circuit breaker contact arc extinguishing module, including a contact holder 10, a moving contact 11 linked to be disposed on the contact holder 10, a static contact 12 matched with the moving contact 11, and an arc extinguishing chamber assembly 20 disposed on the static contact 12, wherein one end of the static contact 12 is bent toward the arc extinguishing chamber assembly 20 and extends to form a contact portion 121, a static contact 122 is disposed on the contact portion 121, the other end of the static contact 12 has a wiring portion 123, the arc extinguishing chamber assembly 20 includes an arc striking piece 21, a contact shield 22 disposed on the static contact 12, an arc extinguishing chamber 23 disposed on the contact shield 22, and a shield 24 disposed on the arc extinguishing chamber 23, the arc striking piece 21 is clamped between the contact portion 121 and the static contact 12, the arc striking piece 21 has two magnetic sheets 211 extending outside the contact shield 22, and the two magnetic sheets 211 are bent and extend to the contact shield 22 respectively, An arc striking angle 212 is arranged on the arc striking member 21 at the two sides of the arc extinguishing chamber 23 corresponding to the stationary contact 122, and the tail part of the arc striking angle 212 is bent and extends into the arc extinguishing chamber 23.

As shown in fig. 1 and 4, two insulating plates 221 are respectively disposed on the contact shield 22 corresponding to two sides of the contact portion 121, an accommodating cavity 220 is formed between the two insulating plates 221, the contact portion 121 is disposed in the accommodating cavity 220, an insulating guide piece 222 attached to the fixed contact 12 is disposed at one end of the contact shield 22, one end of the insulating guide piece 222 is bent and extends into the arc extinguishing chamber 23, and an arc guiding channel 200 is formed between the insulating guide piece 222 and two arc baffles 231 of the arc extinguishing chamber 23. The insulating guide sheet can rapidly introduce the electric arc in the accommodating cavity into the arc extinguishing chamber, so that the aim of rapidly extinguishing the arc can be fulfilled, and the arc extinguishing effect of the contact arc extinguishing module can be improved. Two insulation boards 221 of contact shield 22 on correspond two flash barriers 231 and do not be provided with draw-in groove 223, two flash barriers 231 of explosion chamber 23 block respectively in draw-in groove 223, and constitute explosion chamber 23 and contact shield 22's joint cooperation. The contact protection cover is connected with the arc extinguish chamber in a clamping matching mode, so that the contact protection cover and the arc extinguish chamber can be assembled conveniently, and the assembly efficiency of the contact arc extinguish module can be improved.

As shown in fig. 1, 2 and 5, an arc-isolating shield 13 is disposed on the movable contact 11 at a side corresponding to the movable contact 111, and one end of the arc-isolating shield 13 extends into the contact holder 10. The arc separation protective cover can play a role in cutting off the electric arc, and the electric arc can be prevented from jumping into the contact frame along the moving contact, so that the arc extinguishing effect of the contact arc extinguishing module can be improved. The arc insulation protective cover 13 is provided with a clamping groove 131 matched with the moving contact 11, the clamping groove 131 is clamped on the moving contact 11, a boss 132 is arranged in the clamping groove 131, the moving contact 11 is provided with a clamping hole 112 matched with the boss 132, and the boss 132 is clamped in the clamping hole 112 and forms clamping matching of the arc insulation protective cover 13 and the moving contact 11. The arc isolation shield is connected with the moving contact in a clamping fit mode, so that the arc isolation shield and the moving contact are convenient to assemble, and the assembly efficiency of the contact arc extinguishing module is improved.

This explosion chamber subassembly adopts closed magnetism to blow out arc extinguishing structural design, has two semi-closed structural design's that increase magnetic sheet on the striking piece, can produce bigger magnetic field, and the contact site of static contact is located two and increases between the magnetic sheet to can blow into the arc extinguishing chamber with electric arc, the striking angle on the striking piece can be with electric arc in the arc extinguishing chamber is introduced rapidly, improves the arc extinguishing ability. Therefore, the contact arc extinguishing module has the advantages of simple structure, stable and reliable performance, convenience and quickness in assembly, capability of effectively prolonging the service life of the circuit breaker and improving the breaking capacity of the circuit breaker.

Claims

1. The utility model provides a circuit breaker contact arc extinguishing module, includes contact frame, linkage setting moving contact on the contact frame, with moving contact matched with static contact, set up the arc extinguishing chamber subassembly on the static contact, its characterized in that: the arc striking component comprises an arc striking piece, a contact shield arranged on the fixed contact, an arc extinguishing chamber arranged on the contact shield and a shield arranged on the arc extinguishing chamber, wherein the arc striking piece is clamped between the contact portion and the fixed contact, the arc striking piece is provided with two magnetic sheets extending out of the contact shield, the two magnetic sheets are bent and extended to two sides of the contact shield and the arc extinguishing chamber respectively, an arc striking angle is arranged on the arc striking piece corresponding to the fixed contact, and the tail of the arc striking angle is bent and extended into the arc extinguishing chamber.

2. The circuit breaker arc quenching module of claim 1, wherein: the contact protection cover is provided with an insulating plate on two sides corresponding to the contact part respectively, a containing cavity is formed between the two insulating plates, the contact part is arranged in the containing cavity, one end of the contact protection cover is provided with an insulating guide sheet attached to a fixed contact, one end of the insulating guide sheet is bent and extends into an arc extinguishing chamber, and an arc guide channel is formed between the insulating guide sheet and the two arc isolating plates of the arc extinguishing chamber.

3. The circuit breaker contact quenching module of claim 2, wherein: two insulation boards of contact guard shield on correspond two flash barriers punishment and do not be provided with the draw-in groove, two flash barriers of explosion chamber block respectively in the draw-in groove, and constitute the joint cooperation of explosion chamber and contact guard shield.

4. The circuit breaker contact quenching module of claim 1 or 2, wherein: an arc isolating shield is arranged on one side of the movable contact corresponding to the movable contact, and one end of the arc isolating shield extends into the contact frame.

5. The circuit breaker arc quenching module of claim 4, wherein: the arc-isolating protective cover is provided with a clamping groove matched with the moving contact, the clamping groove is clamped on the moving contact, a boss is arranged in the clamping groove, a clamping hole matched with the boss is formed in the moving contact, and the boss is clamped in the clamping hole and forms clamping matching of the arc-isolating protective cover and the moving contact.