CN212848221U

CN212848221U - Two-phase alternating current contactor

Info

Publication number: CN212848221U
Application number: CN202022099706.1U
Authority: CN
Inventors: 林连木
Original assignee: Enyang Electrical Appliance Co ltd
Current assignee: Enyang Electrical Appliance Co ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-03-30
Anticipated expiration: 2030-09-23

Abstract

The utility model relates to a double-phase ac contactor, including casing, electromagnetic drive mechanism, contact system, arc-extinguish chamber, two auxiliary contacts that set up respectively on the casing both sides, electromagnetic drive mechanism includes yoke iron frame, coil skeleton, quiet iron core, moves iron core, twin coil, sets up the circuit board that just is connected with the twin coil electricity in the casing, the circuit board on be provided with the inhibitor, contact system include the contact subassembly of two sets of symmetries setting in the casing, the contact subassembly include with move iron core linkage complex contact frame, two moving contacts, two settings on contact frame in the casing and respectively with two moving contact matched with static contacts, moving contact and contact frame between be provided with contact spring. The utility model has the advantages of simple structure, stable and reliable performance, long service life and good arc extinguishing effect.

Description

Two-phase alternating current contactor

Technical Field

The utility model relates to a contactor technical field, concretely relates to double-phase ac contactor.

Background

Contactors are classified into alternating current contactors (voltage AC) and direct current contactors (voltage DC), and are applied to electric power, distribution, and power utilization occasions. The contactor is an electric appliance which utilizes a coil to flow current to generate a magnetic field in industrial electricity to close a contact so as to control a load. The two-phase alternating current contactor used in special alternating current equipment in railway locomotives, oil fields, mines and other occasions at present is slightly modified on the basis of a civil alternating current contactor, has large volume and high failure rate, cannot meet the use requirements of high density, large capacity and strong vibration in special occasions such as railways, oil fields, mines and the like, and is complex to maintain, so the use and maintenance cost is high. Therefore, the alternating current contactor also has the defects of unreliable performance, complex structure, large volume, poor arc extinguishing effect and short service life.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a simple structure, stable performance is reliable, long service life, effectual double-phase ac contactor of arc extinguishing.

In order to achieve the above object, the present invention provides a two-phase ac contactor, which comprises a housing, an electromagnetic driving mechanism, a contact system, an arc extinguishing chamber, and two auxiliary contacts disposed on two sides of the housing, wherein the electromagnetic driving mechanism comprises a yoke iron frame, a coil frame disposed in the yoke iron frame, a stationary iron core disposed in the coil frame, a movable iron core movably disposed in the coil frame and matched with the stationary iron core, a double coil disposed outside the coil frame, and a circuit board disposed in the housing and electrically connected with the double coil, the circuit board is provided with a suppressor, the contact system comprises two groups of symmetrical contact assemblies disposed in the housing, the contact assemblies comprise a contact frame in linkage fit with the movable iron core, two movable contacts disposed on the contact frame, and two static contacts disposed in the housing and matched with the two movable contacts respectively, and a contact spring is arranged between the moving contact and the contact frame.

The structure has the advantages that the electromagnetic driving mechanism adopts a double-coil structure, the resistance value of the starting coil is small, the extremely large starting current can be guaranteed to be obtained instantly, the reliable attraction of the contactor is guaranteed, the resistance value of the coil is kept large, the coil can be guaranteed not to generate high heat after the contactor enters a working state, and the structure is safe and energy-saving. And the suppressor on the circuit board can avoid the impact of overvoltage on the contactor. The contact spring can enhance the contact pressure of the moving contact, is beneficial to reducing the contact resistance and improving the working reliability of the contactor. Therefore, the alternating current contactor has the advantages of simple structure, stable and reliable performance, long service life and good arc extinguishing effect.

Particularly, the arc extinguishing chamber is internally provided with a lower arc striking plate corresponding to two fixed contacts respectively, one ends of the two lower arc striking plates are respectively provided with an arc striking angle extending towards the two fixed contacts, an upper arc striking plate corresponding to a position between two movable contacts is arranged in the arc extinguishing chamber, and two ends of the upper arc striking plate extend towards the two movable contacts respectively. The two lower arc striking plates and the upper arc striking plate can respectively and quickly introduce electric arcs on the static contact and the moving contact into the arc extinguishing cover, so that the electric arcs can be quickly extinguished.

Particularly, a magnetic conduction column is arranged in the shell corresponding to the two static contacts respectively. The magnetic conduction column can enhance the magnetic quenching effect and is beneficial to improving the arc quenching performance of the alternating current contactor.

Drawings

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

Fig. 2 is an internal structure diagram of the embodiment of the present invention.

Fig. 3 is a cross-sectional view of an embodiment of the present invention.

Detailed Description

As shown in fig. 1 to 3, an embodiment of the present invention is a two-phase ac contactor, including a housing 10, an electromagnetic driving mechanism 20, a contact system 30, an arc extinguishing chamber 11, and two auxiliary contacts 12 respectively disposed on two sides of the housing 10, the electromagnetic driving mechanism 20 includes a yoke 21, a coil frame 22 disposed in the yoke 21, a stationary core 23 disposed in the coil frame 22, a movable core 24 movably disposed in the coil frame 22 and matched with the stationary core 23, a double coil 25 disposed outside the coil frame 22, and a circuit board 16 disposed in the housing 10 and electrically connected with the double coil 25, the circuit board 16 is provided with a suppressor 161, the contact system 30 includes two sets of contact assemblies 31 symmetrically disposed in the housing 10, the contact assemblies 31 include a contact frame 311 cooperating with the movable core 24, and two movable contacts 312 disposed on the contact frame 311, Two fixed contacts 313 arranged in the housing 10 and respectively matched with two movable contacts 312, and a contact spring 314 is arranged between the movable contacts 312 and the contact frame 311.

As shown in fig. 3, a lower arc piece 111 is respectively disposed in the arc-extinguishing chamber 11 corresponding to the two fixed contacts 313, an arc-striking angle 112 extending towards the two fixed contacts 313 is respectively disposed at one end of each of the two lower arc pieces 111, an upper arc piece 113 is disposed in the arc-extinguishing chamber 11 corresponding to a position between the two movable contacts 312, and two ends of the upper arc piece 113 extend towards the two movable contacts 312 respectively. The two lower arc striking plates and the upper arc striking plate can respectively and quickly introduce electric arcs on the static contact and the moving contact into the arc extinguishing cover, so that the electric arcs can be quickly extinguished. And two magnetic conduction columns 13 are respectively arranged in the shell 10 corresponding to the two fixed contacts 313. The magnetic conduction column can enhance the magnetic quenching effect and is beneficial to improving the arc quenching performance of the alternating current contactor.

The electromagnetic driving mechanism adopts a double-coil structure, the resistance value of the starting coil is small, the extremely large starting current can be obtained instantly, the reliable attraction of the contactor is ensured, the resistance value of the coil is kept large, the coil can be ensured not to generate high heat after the contactor enters a working state, and the electromagnetic driving mechanism is safe and energy-saving. And the suppressor on the circuit board can avoid the impact of overvoltage on the contactor. The contact spring can enhance the contact pressure of the moving contact, is beneficial to reducing the contact resistance and improving the working reliability of the contactor. Therefore, the alternating current contactor has the advantages of simple structure, stable and reliable performance, long service life and good arc extinguishing effect.

Claims

1. The utility model provides a two-phase ac contactor, includes casing, electromagnetic drive mechanism, contact system, arc-extinguishing chamber, two auxiliary contacts that set up respectively on the casing both sides, its characterized in that: the electromagnetic driving mechanism comprises a yoke iron frame, a coil framework arranged in the yoke iron frame, a static iron core arranged in the coil framework, a movable iron core which is movably arranged in the coil framework and matched with the static iron core, a double coil arranged outside the coil framework, and a circuit board which is arranged in the shell and electrically connected with the double coil, wherein the circuit board is provided with an inhibitor, the contact system comprises two groups of symmetrical contact assemblies arranged in the shell, each contact assembly comprises a contact frame which is in linkage fit with the movable iron core, two moving contacts arranged on the contact frame, and two static contacts which are arranged in the shell and respectively matched with the two moving contacts, and a contact spring is arranged between each moving contact and the contact frame.

2. The two-phase ac contactor as claimed in claim 1, wherein: the arc extinguishing chamber is internally provided with a lower arc striking plate corresponding to two fixed contacts respectively, one end of each lower arc striking plate is provided with an arc striking angle extending towards the two fixed contacts respectively, an upper arc striking plate corresponding to a position between two moving contacts is arranged in the arc extinguishing chamber, and two ends of the upper arc striking plate extend towards the two moving contacts respectively.

3. The two-phase ac contactor according to claim 1 or 2, wherein: and the positions in the shell corresponding to the two static contacts are respectively provided with a magnetic conduction column.