CN211578653U

CN211578653U - Arc extinguishing structure of double-group direct current contactor

Info

Publication number: CN211578653U
Application number: CN202020769332.7U
Authority: CN
Inventors: 不公告发明人
Original assignee: Suzhou Anlaiqiang Electronic Technology Co ltd
Current assignee: Suzhou Anlaiqiang Electronic Technology Co ltd
Priority date: 2020-05-11
Filing date: 2020-05-11
Publication date: 2020-09-25
Anticipated expiration: 2030-05-11

Abstract

The utility model discloses a double-group direct current contactor arc extinguishing structure, which comprises a first loop, a second loop and an arc isolation plate arranged between the first loop and the second loop, wherein the first loop comprises a first fixed contact component, a first movable contact component and two first arc extinguishing magnetic steels; and the second loop comprises a second fixed contact component, a second movable contact component and two second arc extinguishing magnetic steels, a space is reserved between the second movable contact component and the second fixed contact component, and the two second arc extinguishing magnetic steels are oppositely arranged and surround the space. The utility model discloses a two DC contactor's arc extinguishing nonpolarity has solved the problem of DC system charge-discharge sharing same contactor, can simplify the DC system structure to resources are saved, reduce cost.

Description

Arc extinguishing structure of double-group direct current contactor

Technical Field

The utility model relates to a direct current contactor especially relates to a two direct current contactor arc extinguishing structures of group.

Background

The dc contactor is a contactor used in a dc circuit, and is mainly used for controlling a dc circuit (a main circuit, a control circuit, an excitation circuit, and the like). The working principle of the direct current contactor is as follows: when the coil of the contactor is electrified, the coil current generates a magnetic field, so that the static iron core generates electromagnetic attraction to attract the movable iron core and drive the contact to act: the normally closed contact is opened, and the normally open contact is closed, and the normally closed contact and the normally open contact are linked. When the coil is powered off, the electromagnetic attraction disappears, and the armature is released under the action of the release spring to restore the contact: the normally open contact is open and the normally closed contact is closed. At present, direct current contact groups are all single-group direct current contactors, and the arc extinguishing structure of the direct current contactor is also single-group, so that the direct current system needs to share the same contactor during charging and discharging, and the design of the direct current system is inconvenient.

Disclosure of Invention

In order to overcome the defects, the utility model provides a two DC contactor arc extinguishing structure has realized two DC contactor's arc extinguishing nonpolarity, has solved the problem of DC system charge-discharge sharing same contactor, can simplify the DC system structure to resources are saved, reduce cost.

The utility model discloses a solve the technical scheme that its technical problem adopted and be:

an arc extinguishing structure of a double-group direct current contactor comprises a first loop, a second loop and an arc isolation plate arranged between the first loop and the second loop, wherein the first loop comprises a first fixed contact component, a first movable contact component and two first arc extinguishing magnetic steels, the connection and disconnection of the first movable contact component and the first fixed contact component can control the connection and disconnection of the first loop, a space is formed between the first movable contact component and the first fixed contact component, the two first arc extinguishing magnetic steels are oppositely arranged and surround the periphery of the space, and the N pole of one first arc extinguishing magnetic steel is opposite to the S pole of the other first arc extinguishing magnetic steel;

the second loop comprises a second fixed contact component, a second movable contact component and two second arc-extinguishing magnetic steels, the connection and disconnection of the second movable contact component and the second fixed contact component can control the on-off of the second loop, a space is formed between the second movable contact component and the second fixed contact component, the two second arc-extinguishing magnetic steels are oppositely arranged and surround the periphery of the space, and the N pole of one second arc-extinguishing magnetic steel is opposite to the S pole of the other second arc-extinguishing magnetic steel.

As a further improvement, the first fixed contact subassembly includes two first static contacts that the interval set up, first movable contact subassembly include with two first moving contacts of first static contact one-to-one with connect in two first connecting plate between the first moving contact.

As a further improvement, the second fixed contact subassembly includes two second static contacts that the interval set up, the second movable contact subassembly include with two second moving contacts of second static contact one-to-one with connect in two second connecting plate between the second moving contact.

As a further improvement, the first loop with the second loop is symmetrical and sets up the left and right sides of flash barrier, the magnetic pole direction of the first arc extinguishing magnet steel of the first loop the magnetic pole direction of the second arc extinguishing magnet steel of the second loop with the direction of flash barrier is parallel, just the magnetic pole direction of the first arc extinguishing magnet steel of the first loop with the magnetic pole opposite direction of the second arc extinguishing magnet steel of the second loop.

The utility model has the advantages that: the utility model provides a two direct current contactor arc extinguishing structure of group is through setting up two return circuits in return circuit one and return circuit to set up the flash barrier between return circuit one and return circuit two, make two return circuits mutually independent, formed a two direct current contactor arc extinguishing structure of group, here, the flash barrier plays isolated electric arc between two return circuits, avoids their mutual interference's effect. The arc extinguishing principle of return circuit one and return circuit two is the same, all is through relative setting and two arc extinguishing magnet steel that the magnetic pole direction is the same carry out the magnetic blow arc extinguishing, because the arc extinguishing in-process, the arc motion opposite direction between moving contact subassembly and the static contact subassembly and be parallel to each other, consequently, the utility model discloses a two dc contactor's of group arc extinguishing nonpolarity, the utility model discloses the problem of dc system charge-discharge sharing same contactor has been solved to two dc contactor arc extinguishing structures of group, can simplify the dc system structure to resources are saved, reduce cost.

Drawings

Fig. 1 is a perspective view of a top view of a double-group dc contactor arc extinguishing structure of the present invention;

fig. 2 is a perspective view of the bottom view of the arc extinguishing structure of the double-group dc contactor of the present invention;

fig. 3 is a side view of the arc extinguishing structure of the double-group dc contactor of the present invention;

fig. 4 is an arc extinguishing schematic diagram of the arc extinguishing structure of the double-group direct current contactor of the utility model;

the following description is made with reference to the accompanying drawings:

1-loop one, 11-first arc extinguishing magnetic steel, 12-first fixed contact, 131-first moving contact, 132-first connecting plate, 2-loop two, 21-second arc extinguishing magnetic steel, 22-second fixed contact, 231-second moving contact, 232-second connecting plate and 3-arc isolation plate.

Detailed Description

The following description of the preferred embodiments of the present invention will be made in conjunction with the accompanying drawings.

Referring to fig. 1, fig. 2, fig. 3 and fig. 4, for the arc extinguishing structure of the double-group dc contactor of the present invention, the arc extinguishing structure includes a first loop 1, a second loop 2 and an arc isolation plate 3 disposed between the first loop and the second loop, the first loop includes a first fixed contact assembly, a first movable contact assembly and two first arc extinguishing magnetic steels 11, the first movable contact assembly is engaged with and disengaged from the first fixed contact assembly to control the on/off of the first loop, a space is provided between the first movable contact assembly and the first fixed contact assembly, two first arc extinguishing magnetic steels are disposed oppositely and surround the space, and the N pole of one first arc extinguishing magnetic steel is opposite to the S pole of the other first arc extinguishing magnetic steel;

the second loop comprises a second fixed contact component, a second movable contact component and two second arc-extinguishing magnetic steels 21, the connection and disconnection of the second movable contact component and the second fixed contact component can control the on-off of the second loop, a space is formed between the second movable contact component and the second fixed contact component, the two second arc-extinguishing magnetic steels are oppositely arranged and surround the periphery of the space, and the N pole of one second arc-extinguishing magnetic steel is opposite to the S pole of the other second arc-extinguishing magnetic steel.

In the structure, the first loop and the second loop are arranged, and the arc isolating plate is arranged between the first loop and the second loop, so that the two loops are mutually independent, and the arc extinguishing structure of the double-group direct current contactor is formed. The arc extinguishing principle of return circuit one and return circuit two is the same, all is through relative setting and two arc extinguishing magnet steels that the magnetic pole direction is the same carry out the magnetic blow arc extinguishing, because the arc extinguishing in-process, the arc motion opposite direction between moving contact subassembly and the static contact subassembly and be parallel to each other, consequently, the utility model discloses a two dc contactor's of group arc extinguishing nonpolarity, the utility model discloses the problem of dc system charge-discharge sharing same contactor can be solved to two dc contactor arc extinguishing structures of group, the dc system structure can be simplified to resources are saved, reduce cost.

As a preferred embodiment, the first fixed contact assembly includes two first fixed contacts 12 arranged at intervals, and the first movable contact assembly includes two first movable contacts 131 corresponding to the two first fixed contacts one by one, and a first connecting plate 132 connected between the two first movable contacts. The second fixed contact assembly includes two second fixed contacts 22 arranged at intervals, and the second movable contact assembly includes two second movable contacts 231 corresponding to the two second fixed contacts one to one and a second connecting plate 232 connected between the two second movable contacts. The first loop and the second loop are symmetrically arranged on the left side and the right side of the arc isolating plate, the magnetic pole direction of the first arc extinguishing magnetic steel of the first loop and the magnetic pole direction of the second arc extinguishing magnetic steel of the second loop are parallel to the direction of the arc isolating plate, and the magnetic pole direction of the first arc extinguishing magnetic steel of the first loop is opposite to the magnetic pole direction of the second arc extinguishing magnetic steel of the second loop.

Referring to fig. 4, illustrating the arc extinguishing principle of the present invention, in the first loop, the current flows from the left end to the right end of the position shown in fig. 4, at this time, under the effect of two first arc extinguishing magnetic steels, the deflection of the arc generated when the two sets of first moving and static contacts perform the breaking operation is shown in fig. 4, the one set of first moving and static contacts moves towards the arc isolating plate, and the other set of first moving and static contacts moves away from the arc isolating plate, so that the two sets of contacts have opposite arc moving directions and are parallel to each other, thereby realizing the polarity-free contact. In the second loop, the current flows from the right end to the left end of the position shown in fig. 4 and flows out, at this time, under the action of the two second arc extinguishing magnetic steels, the two groups of second moving and static contacts deflect the arc generated when the breaking operation is performed, as shown in fig. 4, the one group of second moving and static contacts move towards the arc isolating plate, and the other group of second moving and static contacts move away from the arc isolating plate, so that the two groups of contacts realize opposite and parallel arc moving directions, and the non-polarity of the contacts is realized.

In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the invention. The foregoing description is only illustrative of the preferred embodiments of the invention, which can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. All the contents that do not depart from the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention all still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a two direct current contactor arc extinguishing structure which characterized in that: the circuit comprises a first loop (1), a second loop (2) and an arc isolation plate (3) arranged between the first loop and the second loop, wherein the first loop comprises a first fixed contact component, a first movable contact component and two first arc extinguishing magnetic steels (11), the connection and disconnection of the first movable contact component and the first fixed contact component can control the connection and disconnection of the first loop, a space is formed between the first movable contact component and the first fixed contact component, the two first arc extinguishing magnetic steels are oppositely arranged and surround the periphery of the space, and the N pole of one first arc extinguishing magnetic steel is opposite to the S pole of the other first arc extinguishing magnetic steel;

the second loop comprises a second fixed contact component, a second movable contact component and two second arc-extinguishing magnetic steels (21), the connection and disconnection of the second movable contact component and the second fixed contact component can control the on-off of the second loop, a space is reserved between the second movable contact component and the second fixed contact component, the two second arc-extinguishing magnetic steels are oppositely arranged and surround the periphery of the space, and the N pole of one second arc-extinguishing magnetic steel is opposite to the S pole of the other second arc-extinguishing magnetic steel.

2. The arc extinguishing structure of the double-set direct current contactor as claimed in claim 1, wherein: the first fixed contact component comprises two first fixed contacts (12) which are arranged at intervals, and the first movable contact component comprises two first movable contacts (131) which correspond to the two first fixed contacts one by one and a first connecting plate (132) connected between the two first movable contacts.

3. The arc extinguishing structure of the double-set direct current contactor as claimed in claim 1, wherein: the second fixed contact component comprises two second fixed contacts (22) which are arranged at intervals, and the second movable contact component comprises two second movable contacts (231) which correspond to the two second fixed contacts one by one and a second connecting plate (232) connected between the two second movable contacts.

4. The arc extinguishing structure of the double-set direct current contactor as claimed in claim 1, wherein: the first loop and the second loop are symmetrically arranged on the left side and the right side of the arc isolating plate, the magnetic pole direction of the first arc extinguishing magnetic steel of the first loop and the magnetic pole direction of the second arc extinguishing magnetic steel of the second loop are parallel to the direction of the arc isolating plate, and the magnetic pole direction of the first arc extinguishing magnetic steel of the first loop is opposite to the magnetic pole direction of the second arc extinguishing magnetic steel of the second loop.