CN217333940U

CN217333940U - Contactor arc extinguishing system and contactor

Info

Publication number: CN217333940U
Application number: CN202220345582.7U
Authority: CN
Inventors: 张森林; 刘毅; 骆琳; 易颖; 王辉
Original assignee: Shanghai Electrical Apparatus Research Institute Group Co Ltd
Current assignee: Shanghai Electrical Apparatus Research Institute Group Co Ltd
Priority date: 2022-02-21
Filing date: 2022-02-21
Publication date: 2022-08-30
Anticipated expiration: 2032-02-21

Abstract

The application provides a contact arc extinguishing system of a contactor and the contactor, wherein the contact arc extinguishing system comprises a contact system and an arc extinguishing system, the contact system comprises a fixed contact and a movable contact, the movable contact and the fixed contact can be in separable contact and can generate electric arcs when being separated, the arc extinguishing system comprises a shell, an arc extinguishing assembly and a transfer device, the arc extinguishing assembly comprises a first arc extinguishing area and a second arc extinguishing area, the first arc extinguishing area and the second arc extinguishing area are located on two sides of the contact system, and the first arc extinguishing area and the second arc extinguishing area are arranged oppositely in a first direction; the transfer device is positioned at the outer peripheral side of the arc extinguishing assembly, the transfer device generates a magnetic field, and the electric arc is transferred to the arc extinguishing assembly under the action of the magnetic field; when moving contact and static contact separation, transfer device can shift the electric arc to first arc-extinguishing area or second arc-extinguishing area according to the current direction. The arc extinguishing system of contact that this application embodiment provided has improved the use adaptation degree of contactor greatly, has promoted user experience.

Description

Contactor arc extinguishing system and contactor

Technical Field

The application relates to the technical field of contactors, in particular to a contact arc extinguishing system of a contactor and the contactor.

Background

The contactor is an electric control element, is generally used for connecting and disconnecting a power battery system in the field of new energy application, for example, a high-voltage direct-current contactor is usually adopted by an electric vehicle, and a high-voltage battery system can be disconnected in case of an accident.

The contactor generally comprises two fixed contacts, one for connecting the positive pole and the other for connecting the negative pole, and when the contactor is installed in a circuit, the installation positions of the positive pole and the negative pole in the contactor are fixed, so that the positions of the positive pole and the negative pole in the contactor are almost impossible to change on the premise of not changing the installation position of the contactor, inconvenience is caused in the use process, and user experience is reduced.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an arc extinguishing system and contactor of contactor to improve the use adaptation degree of the contact arc extinguishing system of contactor.

In a first aspect, an embodiment of the present application provides a contact arc extinguishing system of a contactor, including a contact system and an arc extinguishing system, the contact system includes a fixed contact and a movable contact, the movable contact and the fixed contact are separably contacted and can generate an arc when separated, the arc extinguishing system includes a housing and is located in the housing:

the arc extinguishing assembly comprises a first arc extinguishing zone and a second arc extinguishing zone which are positioned at two sides of the contact system, and the first arc extinguishing zone and the second arc extinguishing zone are oppositely arranged in a first direction;

the transfer device is positioned on the outer peripheral side of the arc extinguishing assembly, a magnetic field is generated by the transfer device, and the electric arc is transferred to the arc extinguishing assembly under the action of the magnetic field;

when moving contact and static contact separation, transfer device can shift the electric arc to first arc-extinguishing area or second arc-extinguishing area according to the current direction.

According to any one of the embodiments of the present application, the fixed contact includes a first fixed contact and a second fixed contact, the first fixed contact and the second fixed contact are disposed opposite to each other in the second direction, the arc extinguishing assembly further includes a third arc extinguishing region and a fourth arc extinguishing region, and the third arc extinguishing region and the fourth arc extinguishing region are disposed opposite to each other in the first direction; the first arc extinguishing area and the second arc extinguishing area are positioned on two sides of the first static contact in the first direction, and the third arc extinguishing area and the fourth arc extinguishing area are positioned on two sides of the second static contact in the first direction; the first arc extinguishing area and the third arc extinguishing area are positioned on the same side of the static contact and are arranged in an insulating way, the second arc extinguishing area and the fourth arc extinguishing area are positioned on the other side of the static contact and are arranged in an insulating way, when the dynamic contact is separated from the static contact, the electric arc between the first static contact and the dynamic contact is transferred to the first arc extinguishing area or the second arc extinguishing area, and correspondingly, the electric arc between the second static contact and the dynamic contact is transferred to the fourth arc extinguishing area or the third arc extinguishing area; the first direction and the second direction are vertical in a first plane parallel to the contact plane of the fixed contact and the movable contact.

According to any one of the embodiments of the present application, the arc extinguishing assembly further includes an arc striking member, and the arc striking member is configured to transfer an arc root of the moving contact to the arc extinguishing assembly during a process of separating the moving contact from the stationary contact.

According to any of the embodiments of the present application, the movable contact includes a contact body and an arc striking portion connected to an end portion of the contact body, the arc striking portion extends from the end portion of the contact body to a side away from the stationary contact and transfers an arc root of the movable contact to the arc striking member.

According to any of the preceding embodiments of the present application, the arc ignition portion comprises two arc ignition subsections oppositely arranged in the first direction, the two arc ignition subsections respectively extending in directions away from each other.

According to any one of the previous embodiments of the present application, the transfer device includes a first permanent magnet and a second permanent magnet, both of which are arc-shaped structures and are oppositely disposed along the center of the movable contact.

According to any of the embodiments of the present application, in a first plane parallel to a contact plane of the movable contact and the stationary contact, a direction of a maximum magnetic induction line between the first permanent magnet and the second permanent magnet is parallel to a second direction, and an orthographic projection of the maximum magnetic induction line on the first plane passes through a center of the stationary contact, wherein, in the first plane parallel to the contact plane of the movable contact and the stationary contact, the second direction is perpendicular to the first direction.

According to any of the embodiments of the present application, in a first plane parallel to a contact plane of the movable contact and the fixed contact, an included angle α between a direction of a maximum magnetic induction line between the first permanent magnet and the second permanent magnet and a second direction is in a range of 0 ° < α ≦ 60 °, and an orthographic projection of the maximum magnetic induction line on the first plane through a midpoint of a connection line between centers of the first fixed contact and the second fixed contact is provided, where in the first plane parallel to the contact plane of the movable contact and the fixed contact, the second direction is perpendicular to the first direction.

According to any of the embodiments described herein before, the included angle α is in the range of 15 ° α or more and 30 ° α or less.

According to any one of the previous embodiments of the application, the arc extinguishing device further comprises an adjusting device, and the adjusting device can adjust the range of the transfer device enveloping the arc extinguishing assembly.

According to any one of the preceding embodiments of the present application, the adjusting device includes a first handle and a second handle, the orthographic projection of the first handle on the first plane and the orthographic projection of the second handle on the first plane are oppositely arranged along the center of the moving contact on the first plane, the first permanent magnet includes a first end and a second end which are opposite to each other in the bending direction of the first permanent magnet, the second permanent magnet includes a third end and a fourth end which are opposite to each other in the bending direction of the second permanent magnet, the first end and the third end are adjacent, the second end and the fourth end are adjacent, the first handle is disposed between the first end and the third end, the second handle is disposed between the second end and the fourth end, and the first handle and the second handle can both drive the first permanent magnet and the second permanent magnet to rotate.

According to any one of the preceding embodiments of the application, the first handle and the second handle respectively include a handle body and a clamping portion connected to the handle body, the casing has a clamping matching portion, the clamping portion can be clamped with the clamping matching portion, when the clamping portion is clamped with the clamping matching portion, the first permanent magnet is located at a first preset position, the second permanent magnet is located at a second preset position, wherein when the first permanent magnet is located at the first preset position and the second permanent magnet is located at the second preset position, an included angle α is formed between the maximum magnetic induction line direction of the first permanent magnet and the second direction.

According to any one of the previous embodiments of the application, the shell comprises a shell body, a mounting part and an outer peripheral part which are sequentially nested, the shell body is used for mounting the contact system and the arc extinguishing assembly, and the mounting part is used for mounting the transfer device; the installation department includes first arc slide rail and second arc slide rail, and first arc slide rail sets up in the orthographic projection of first plane and second arc slide rail at the orthographic projection of first plane along the center of moving contact at the orthographic projection of first plane relatively, and first permanent magnet sliding connection is in first arc slide rail, and second permanent magnet sliding connection is in second arc slide rail.

According to any one of the previous embodiments of the application, the mounting portion further comprises a first boss and a second boss, a first gap is formed between one end of the first arc-shaped slide rail and one end of the second arc-shaped slide rail, a second gap is formed between the other end of the first arc-shaped slide rail and the other end of the second arc-shaped slide rail, the first boss is arranged in the first gap, the second boss is arranged in the second gap, and the first boss and the second boss are used for limiting the first permanent magnet on the first arc-shaped slide rail and limiting the second permanent magnet on the second arc-shaped slide rail; wherein, the first handle is connected with the first boss in a sliding way, and the second handle is connected with the second boss in a sliding way.

According to any one of the embodiments of the present application, a first identification portion is disposed on a surface of the first handle, a second identification portion is disposed on a surface of the second handle, when the first permanent magnet rotates to a first preset position and the second permanent magnet rotates to a second preset position, the first identification portion indicates a polarity of a stationary contact closest to the first handle, and the second identification portion indicates a polarity of a stationary contact closest to the second handle, wherein when the first permanent magnet is located at the first preset position and the second permanent magnet is located at the second preset position, an included angle α is formed between a maximum magnetic induction line direction of the first permanent magnet and a maximum magnetic induction line direction of the second permanent magnet and the second direction.

In a second aspect, the present application also provides a contactor, which includes the foregoing contact arc extinguishing system.

The contact arc extinguishing system of this application embodiment sets up first arc extinguishing district and second arc extinguishing district through the both sides in the first direction at contact system, and transfer device can shift electric arc to carrying out the arc extinguishing in first arc extinguishing district or the second arc extinguishing district according to the difference of direction of current. Specifically, when the arc current direction between the moving contact and the fixed contact is opposite, the arc can be transferred to the first arc extinguishing area or the second arc extinguishing area under the action of the magnetic field of the transfer device. Therefore, each fixed contact of the contact arc extinguishing system provided by the embodiment of the application can be used for connecting the positive electrode and the negative electrode of the circuit, and the function of arc extinguishing can be achieved. Therefore, when the contact arc extinguishing system provided by the embodiment of the application is installed, the positions of the anode and the cathode in the circuit do not need to be considered, and the contact arc extinguishing system can be installed under any condition, so that the use adaptation degree of the contactor is greatly improved, and the user experience is improved.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present application will be described below by referring to the accompanying drawings.

FIG. 1 illustrates a cross-sectional view of a contactor according to an embodiment of the present application;

FIG. 2 shows another cross-sectional view of the contactor shown in FIG. 1;

fig. 3 illustrates a partial schematic diagram of a contact quenching system according to an embodiment of the present application;

fig. 4 illustrates a partial exploded view of a contact arc quenching system according to an embodiment of the present application;

fig. 5 illustrates a partial structural schematic view of a housing of the contactor contact quenching system shown in fig. 1;

FIG. 6 shows a schematic structural view of the first arc-extinguishing zone in FIG. 4;

fig. 7 shows a schematic structural view of the arc chute plates of the first arc-extinguishing zone in fig. 6;

FIG. 8 is a schematic structural view of an upper tab of the first arc extinguishing zone of FIG. 6;

fig. 9 shows a schematic structural view of an arc striking member of the contact quenching system of fig. 4;

FIG. 10 shows a schematic view of a partial structure of the contactor of FIG. 1;

fig. 11 shows a top view of the moving contact of the contact quenching system of fig. 4;

fig. 12 shows a schematic structural view of the movable contact of the contact quenching system in fig. 4;

fig. 13 illustrates a cross-sectional view of a contact quenching system according to an embodiment of the present application;

fig. 14 illustrates a schematic diagram of an arc extinguishing system according to an embodiment of the present application;

fig. 15 shows a schematic diagram of a distribution of the lorentz forces experienced by the arc in the contact quenching system shown in fig. 13;

FIG. 16 is a schematic diagram illustrating another distribution of the Lorentz force experienced by the arc in the contact quenching system of FIG. 13;

fig. 17 illustrates a schematic distribution of magnetic fields generated by a transfer device of a contact quenching system according to an embodiment of the present application;

fig. 18 shows a schematic view of a distribution of the magnetic field generated by the transfer device of the contact quenching system according to an embodiment of the application;

FIG. 19 shows a schematic structural diagram of a contactor according to an embodiment of the present application;

figure 20 shows a top view of the contactor shown in figure 19;

figure 21 shows another top view of the contactor shown in figure 19;

fig. 22 shows a schematic structural view of an adjusting device of a contact quenching system according to an embodiment of the application;

FIG. 23 shows a schematic view of the adjustment device of FIG. 22 at another angle;

fig. 24 illustrates a schematic structural view of a housing of a contact quenching system of the contactor of fig. 19;

FIG. 25 is a partial schematic view of the contactor of FIG. 19;

fig. 26 shows another partial structural schematic view of the contactor of fig. 19.

Reference numerals are as follows:

1. static contact;

11. a first fixed contact; 12. a second fixed contact;

2. a moving contact;

21. a contact body; 22. an arc striking part; 23. an arc ignition sub-section;

3. an arc extinguishing assembly;

31. a first arc extinguishing zone; 32. a second arc extinguishing zone; 33. a third arc extinguishing zone; 34. a fourth arc extinguishing zone; 35. an arc striking member; 351. a plate body; 352. an arc guide part; 353. a first cavity; 36. an upper arc striking sheet; 37. arc extinguishing grid pieces; 38. an inner side plate; 39. an outer panel;

4. a transfer device;

41. a first permanent magnet; 411. a first end; 412. a second end; 42. a second permanent magnet; 421. a third end; 422. a fourth end; 43. a maximum magnetic induction line;

5. an adjustment device;

51. a first handle; 511. a first identification portion; 512. a fifth identification part; 513. a second identification subsection; 52. a second handle; 521. a second identification portion; 522. a sixth identification portion; 523. a fourth identification subsection; 53. a handle body; 54. a clamping part; 55. stripes;

6. a housing;

61. a housing body; 611. a third identification portion; 612. a fourth identification portion; 613. a first identification subsection; 614. a third identification subsection; 615. an arc-isolating piece; 616. a jack; 617. a protrusion; 62. an installation part; 621. a first arc-shaped slide rail; 622. a second arc-shaped slide rail; 623. a first boss; 624. a second boss; 63. a peripheral portion; 631. a clamping fit part; 64. positioning a plate; 641. positioning blocks;

71. a top rod; 72. a stationary iron core; 73. a movable iron core; 74. a bobbin coil; 75. a metal cup; 76. a main spring; 77. a clamp spring; 78. a contact spring;

A. a first direction;

B. a second direction.

Detailed Description

Embodiments of the present application will be described in further detail below with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the application and are not intended to limit the scope of the application, i.e., the application is not limited to the described embodiments.

In the description of the present application, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, indicate an orientation or positional relationship that is merely for convenience in describing the application and to simplify the description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The following description is given with the directional terms as they are used in the drawings and not intended to limit the specific structure of the present application. In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood as appropriate by one of ordinary skill in the art.

The contactor includes a dc contactor and an ac contactor, and the dc contactor is a contactor used in a dc circuit and mainly used for controlling a dc circuit (a main circuit, a control circuit, an excitation circuit, and the like). Because the attraction coil of the direct current contactor is electrified with direct current, the direct current contactor has no impact starting current, does not generate the phenomenon of violent impact of an iron core, has longer service life relative to the alternating current contactor, and is suitable for occasions of frequent starting and stopping.

Fig. 1 illustrates a cross-sectional view of a contactor according to an embodiment of the present application, and fig. 2 illustrates another cross-sectional view of the contactor illustrated in fig. 1.

Referring to fig. 1 and 2, the contactor electromagnetic system and the contact arc extinguishing system include a plunger 71, a stationary core 72, a movable core 73, a bobbin coil 74, a metal cup 75, a main spring 76, a snap spring 77, and a contact spring 78.

Fig. 3 illustrates a partial structural schematic view of a contact arc extinguishing system according to an embodiment of the present application, and fig. 4 illustrates a partial structural exploded view of the contact arc extinguishing system according to an embodiment of the present application.

Referring to fig. 3 and 4, an embodiment of the present application provides a contact arc extinguishing system of a contactor, where the contact arc extinguishing system includes a contact system and an arc extinguishing system.

The contact system comprises a fixed contact 1 and a movable contact 2, wherein the movable contact 2 and the fixed contact 1 can be in separable contact and can generate electric arcs when being separated.

The arc extinguishing system comprises a housing 6 and an arc extinguishing assembly 3 and a transfer device 4 located in the housing 6.

The arc extinguishing assembly 3 comprises a first arc extinguishing zone 31 and a second arc extinguishing zone 32 located on both sides of the contact system, the first arc extinguishing zone 31 and the second arc extinguishing zone 32 being arranged opposite in the first direction a.

The transfer device 4 is positioned at the outer periphery side of the arc extinguishing assembly 3, the transfer device 4 generates a magnetic field, and the electric arc is transferred to the arc extinguishing assembly 3 under the action of the magnetic field.

When the moving contact 2 is separated from the stationary contact 1, the transfer device 4 can transfer the arc to the first arc-extinguishing zone 31 or the second arc-extinguishing zone 32 according to the current direction.

It should be noted that the number of the static contacts 1 is not limited, and may be one or two. When the number of the stationary contacts 1 is one, the arc extinguishing assembly 3 comprises only the first arc extinguishing zone 31 and the second arc extinguishing zone 32.

Optionally, the first arc-extinguishing area 31 and the second arc-extinguishing area 32 are symmetrically disposed on two sides of the movable contact 2. Of course, the first arc-extinguishing zone 31 and the second arc-extinguishing zone 32 may also have different structures, shapes and sizes, and only need to perform the arc-extinguishing function, and the present application is not limited herein.

The transfer device 4 of the present application may be a pair of permanent magnets capable of generating a magnetic field, or may be another device capable of generating a magnetic field, and the present application is not limited to this.

Please refer to fig. 1 and fig. 2, which take two static contacts 1 as an example. The moving contact 2 is connected with the upper part of the ejector rod 71, the two static contacts 1 are oppositely arranged on two sides above the ejector rod 71, and the two static contacts 1 can be separately contacted with the moving contact 2 respectively. The exterior of the electromagnetic system is completely covered by a metal cup 75, the metal cup 75 mainly takes on the role of a magnetic yoke, and the large-area metal outer surface of the metal cup assists in arc cooling. The metal cup 75 is made of a magnetically conductive metal material, such as electrically pure iron, plated on the outer surface, etc. The lower part of the ejector rod 71 is connected with the movable iron core 73, and the ejector rod 71 is made of insulating materials, so that the movable contact 2 is electrically isolated from the movable iron core 73.

When the framework coil 74 of the contactor is energized, the current in the framework coil 74 generates a magnetic field, and the magnetic field causes the static iron core 72 to generate electromagnetic attraction to attract the movable iron core 73 below, so that the movable contact 2 acts simultaneously with the static iron core, and further the movable contact 2 and the static contact 1 are closed. When the skeleton coil 74 of the contactor is powered off, the electromagnetic attraction force disappears, and the movable contact 2 is disconnected from the fixed contact 1. However, when the bobbin coil 74 is powered off, the output circuit has a high voltage and a large current, and an arc is generated between the moving contact 2 and the stationary contact 1, which delays the opening of the circuit.

The contact arc extinguishing system of this application embodiment sets up first arc-extinguishing zone 31 and second arc-extinguishing zone 32 through at contact system in first direction A's both sides, and transfer device 4 can be according to the difference of current direction, shifts electric arc to and carries out the arc extinguishing in first arc-extinguishing zone 31 or the second arc-extinguishing zone 32. In particular, when the direction of the arc current between the moving contact 2 and the stationary contact 1 is opposite, the arc is transferred into the first extinguishing zone 31 or the second extinguishing zone 32 by the magnetic field of the transferring device 4. Therefore, each static contact 1 of the contact arc extinguishing system provided by the embodiment of the application can be used for connecting the positive electrode and the negative electrode of a circuit, and both the static contact and the negative electrode can play a role in arc extinguishing. Therefore, when the contact arc extinguishing system provided by the embodiment of the application is installed, the positions of the anode and the cathode in the circuit do not need to be considered, and the contact arc extinguishing system can be installed under any condition, so that the use adaptation degree of the contactor is greatly improved, and the user experience is improved.

In some optional embodiments, the fixed contact 1 includes a first fixed contact 11 and a second fixed contact 12, the first fixed contact 11 and the second fixed contact 12 are disposed opposite to each other in the second direction B, the arc extinguishing assembly 3 further includes a third arc extinguishing region 33 and a fourth arc extinguishing region 34, and the third arc extinguishing region 33 and the fourth arc extinguishing region 34 are disposed opposite to each other in the first direction a; the first arc-extinguishing area 31 and the second arc-extinguishing area 32 are located on two sides of the first fixed contact 11 in the first direction a, and the third arc-extinguishing area 33 and the fourth arc-extinguishing area 34 are located on two sides of the second fixed contact 12 in the first direction a; the first arc-extinguishing zone 31 and the third arc-extinguishing zone 33 are located on the same side of the static contact 1 and are arranged in an insulated manner, and the second arc-extinguishing zone 32 and the fourth arc-extinguishing zone 34 are located on the other side of the static contact 1 and are arranged in an insulated manner. When the moving contact 2 is separated from the static contact 1, the arc between the first static contact 11 and the moving contact 2 is transferred to the first arc extinguishing zone 31 or the second arc extinguishing zone 32, and correspondingly, the arc between the second static contact 12 and the moving contact 2 is transferred to the fourth arc extinguishing zone 34 or the third arc extinguishing zone 33; wherein, in a first plane parallel to the contact plane of the static contact 1 and the movable contact 2, the first direction a is perpendicular to the second direction B.

Specifically, when the arc between the first fixed contact 11 and the movable contact 2 is transferred to the first arcing zone 31, the arc between the second fixed contact 12 and the movable contact 2 is transferred to the fourth arcing zone 34; when the arc between the first fixed contact 11 and the movable contact 2 is transferred to the second extinguishing zone 32, the arc between the second fixed contact 12 and the movable contact 2 is transferred to the third extinguishing zone 33.

The contact plane is a plane where one surface of the moving contact 2 close to the static contact 1 is located when the moving contact 2 is in contact with the static contact 1, and the first plane is any plane parallel to the contact plane.

It should be noted that the first direction a and the second direction B are perpendicular to each other in a first plane parallel to a contact plane of the stationary contact 1 and the movable contact 2, which means that the first direction a and the second direction B are perpendicular to each other in the first plane.

Optionally, the third arc-extinguishing area 33 and the fourth arc-extinguishing area 34 are symmetrically disposed on two sides of the movable contact 2. Further alternatively, the first arc-extinguishing zone 31 and the third arc-extinguishing zone 33 are symmetrically arranged along the first direction a, and the second arc-extinguishing zone 32 and the fourth arc-extinguishing zone 34 are symmetrically arranged along the first direction a. Namely, the first arc-extinguishing zone 31, the second arc-extinguishing zone 32, the third arc-extinguishing zone 33 and the fourth arc-extinguishing zone 34 are four identical arc-extinguishing zones. Of course, the first arc extinguishing zone 31, the second arc extinguishing zone 32, the third arc extinguishing zone 33 and the fourth arc extinguishing zone 34 can be different in shape, structure and size, and only the arc extinguishing function needs to be performed, so that the arc extinguishing device is not limited in the application.

Fig. 5 is a partial structural view illustrating a housing of a contact quenching system in the contactor shown in fig. 1.

Wherein, first arc extinguishing zone 31 and third arc extinguishing zone 33 are insulating to be set up, and second arc extinguishing zone 32 and fourth arc extinguishing zone 34 are insulating to be set up, and optional, adopt between first arc extinguishing zone 31 and the third arc extinguishing zone 33, between second arc extinguishing zone 32 and the fourth arc extinguishing zone 34 to separate arc 615 insulating setting. Further alternatively, the arc-insulating piece 615 is fixedly connected with the housing 6. The size and shape of the arc-isolating piece 615 are required to completely isolate the first arc-extinguishing zone 31 from the third arc-extinguishing zone 33, and completely isolate the second arc-extinguishing zone 32 from the fourth arc-extinguishing zone 34, which is not limited herein. The arc-isolating piece 615 is made of insulating material. Of course, the first arc-extinguishing zone 31 and the third arc-extinguishing zone 33, and the second arc-extinguishing zone 32 and the fourth arc-extinguishing zone 34 may be insulated from each other in other manners. For example, taking the first arc-extinguishing zone 31 and the third arc-extinguishing zone 33 as an example, the entire end surface of the first arc-extinguishing zone 31 facing the third arc-extinguishing zone 33 is provided with an arc-blocking plate, and the entire end surface of the third arc-extinguishing zone 33 facing the first arc-extinguishing zone 31 is also provided with an arc-blocking plate. The arc baffle is made of insulating materials.

Optionally, the housing 6 is provided with a socket 616 for mounting the first stationary contact 11 and the second stationary contact 12.

By arranging the first arc extinguishing area 31 and the second arc extinguishing area 32 on two sides of the first fixed contact 11 and arranging the third arc extinguishing area 33 and the fourth arc extinguishing area 34 on two sides of the second fixed contact 12, under the action of the magnetic field of the transfer device 4, the electric arc between the first fixed contact 11 and the movable contact 2 enters the first arc extinguishing area 31, and the electric arc between the second fixed contact 12 and the movable contact 2 enters the fourth arc extinguishing area 34. Or, the polarities of the first fixed contact 11 and the second fixed contact 12 are exchanged, and the arc between the first fixed contact 11 and the movable contact 2 can enter the second arc extinguishing region 32 and the arc between the second fixed contact 12 and the movable contact 2 can enter the third arc extinguishing region 33 by skillfully setting the position of the transfer device 4 or changing the envelope range of the magnetic field of the transfer device 4.

Therefore, when the contactor is installed in the circuit, the positions of the anode and the cathode in the circuit still need not to be considered, and the contactor can be installed under any condition, so that the use adaptation degree of the contactor is greatly improved, and the user experience is improved.

Fig. 6 shows a schematic structural diagram of the first arc extinguishing zone in fig. 4, fig. 7 shows a schematic structural diagram of arc extinguishing grids of the first arc extinguishing zone in fig. 6, and fig. 8 shows a schematic structural diagram of an upper arc striking plate of the first arc extinguishing zone in fig. 6.

Referring to fig. 6 to 8, in some alternative embodiments, the first arc-extinguishing zone 31, the second arc-extinguishing zone 32, the third arc-extinguishing zone 33 and the fourth arc-extinguishing zone 34 are formed by arc-extinguishing chambers. The arc chute includes a plurality of arc chute plates 37 arranged in a stacked manner and an upper striking plate 36 located above the arc chute plates 37. Optionally, the upper arc striking plate 36 includes a body portion and a bending portion, the body portion and the arc extinguishing grid plate 37 are stacked, and the bending portion extends from the body portion toward the corresponding first stationary contact 11 or second stationary contact 12, so as to transfer the arc of the corresponding first stationary contact 11 or second stationary contact 12 to itself.

Optionally, the arc extinguishing chamber includes an inner side plate 38 located on one side of the arc chute 37 close to the contact system and an outer side plate 39 located on one side of the arc chute 37 far from the contact system, the inner side plate 38 is provided with a plurality of limiting holes for limiting the upper arc striking plate 36 and the arc chute 37, and the number of the limiting holes is not less than the sum of the numbers of the arc chute 37 and the upper arc striking plate 36. Similarly, the outer plate 39 is provided with a plurality of limiting grooves for limiting the arc extinguishing grids 37 and the upper arc striking plates 36, and the number of the limiting grooves is not less than the sum of the numbers of the arc extinguishing grids 37 and the upper arc striking plates 36.

Optionally, the inner plate 38 and the outer plate 39 are made of an insulating material.

The outer plate 39 is located on one side of the arc extinguishing assembly close to the housing 6 and abuts against the inner wall of the housing 6, and the outer plate 39 is used for preventing the arc from blowing toward the housing 6. Further alternatively, the length of the outer plate 39 in the second direction B is greater than the length of the arc chute 37 in the second direction B.

By arranging the inner side plate 38 and the outer side plate 39, the upper arc striking plate 36 and the arc extinguishing grid plate 37 are installed and positioned, and the outer side plate 39 also plays a role in blocking electric arcs, so that the electric arcs are prevented from burning the inner wall surface of the shell 6.

Fig. 9 is a schematic structural view of an arc striking member of the contact arc extinguishing system of fig. 4, and fig. 10 is a partial schematic structural view of the contactor of fig. 1.

Referring to fig. 9 and 10, in some alternative embodiments, the arc extinguishing assembly 3 further includes an arc striking member 35, and the arc striking member 35 is used for transferring the arc root of the movable contact 2 into the arc extinguishing assembly 3 during the separation process of the movable contact 2 and the stationary contact 1.

Optionally, the arc striking component 35 is an arc striking plate, and the arc striking plate is located below the arc extinguishing assembly 3, that is, one side of the arc extinguishing assembly 3 close to the stationary core 72, and is stacked on the arc extinguishing grid 37. Optionally, the arc striking plate includes a plate body 351 and four arc guiding portions 352 connected to the plate body 351, a through hole is formed in the center of the plate body 351, the through hole is used for the ejector rod 71 to pass through, and the plate body 351 is used for contacting with the movable contact 2.

The four arc guiding parts 352 are respectively in one-to-one correspondence with the first arc extinguishing zone 31, the second arc extinguishing zone 32, the third arc extinguishing zone 33 and the fourth arc extinguishing zone 34 at intervals. Of course, the arc guiding portion 352 may abut against the lowermost arc chute 37 in the arc chute, and the present application is not limited thereto. Optionally, the extending direction of the arc guiding portion 352 is the same as the extending direction of the arc chute 37, and the shapes of the arc guiding portion and the arc chute are matched.

In other alternative embodiments, the arc ignition member 35 is a wire. One end of the wire is connected with the bottom of the arc extinguishing component 3, and the other end is connected with the moving contact 2. Of course, the arc striking member 35 may also be of other structures capable of moving the arc root of the movable contact 2, and this application is not limited to this.

Optionally, the housing 6 includes a positioning plate 64, the positioning plate 64 being located between the stationary core 72 and the arc ignition member 35. As a further alternative, the positioning plate 64 is made of an insulating material to electrically isolate the stationary core 72 from the arc striking plate.

Further optionally, the positioning plate 64 is provided with a positioning block 641 for limiting the arc guiding portion 352, and the positioning block 641 abuts against two opposite sides of the arc guiding portion 352. Optionally, the number of the positioning blocks 641 is eight, which corresponds to four arc guiding portions 352. Still further alternatively, the inner plate 38 abuts against the positioning block 641, and the outer plate 39 abuts against the positioning plate 64. Of course, the inner plate 38 may be fixed to the positioning block 641 by bonding or the like.

Optionally, the thickness of the positioning block 641 is smaller than that of the arc guiding portion 352. In this way, the inner side plate 38 and the outer side plate 39 are located at two opposite sides of the corresponding arc guiding portion 352, that is, the arc guiding portion 352 is clamped by the inner side plate 38 and the outer side plate 39, and the arc guiding portion 352 limits the inner side plate 38 and the outer side plate 39 in the first plane, thereby limiting the arc extinguishing chamber.

A first cavity 353 is formed between the two arc conducting parts 352 on the same side of the first fixed contact 11 and the second fixed contact 12, and the first cavity 353 is used for accommodating the bottom of the arc isolating piece 615. Optionally, the first cavity 353 matches the shape and size of the arc splitter 615. Therefore, the arc isolating piece 615, the inner wall of the shell 6 and the arc striking plate form a limiting and fixing function on the arc extinguishing chamber.

Further alternatively, the cross-sectional shape of the flash barrier 615 is T-shaped, and the cross-section of the transverse portion of the T-shape is triangular.

Fig. 11 is a plan view of the movable contact of the arc extinguishing system of fig. 4, and fig. 12 is a schematic structural diagram of the movable contact of the arc extinguishing system of fig. 4.

Referring to fig. 11 and 12, in some alternative embodiments, the movable contact 2 includes a contact body 21 and an arc striking portion 22 connected to an end portion of the contact body 21, where the arc striking portion 22 extends from the end portion of the contact body 21 to a side away from the stationary contact 1 and transfers an arc root of the movable contact 2 to an arc striking member 35.

Optionally, the end of the arc striking portion 22 away from the contact body 21 abuts against the plate body 351 of the arc striking plate when descending, and the arc root of the arc is transferred to the arc guiding portion 352, so that the arc is extinguished in the arc extinguishing assembly 3.

Alternatively, the number of the arc ignition portions 22 is two. The two arc striking portions 22 are located at two opposite ends of the contact body 21 in the second direction B, corresponding to a case where the contact arc extinguishing system has two stationary contacts 1. Of course, the number of the arc striking portion 22 may be one, which corresponds to the case that the arc extinguishing system has one stationary contact 1, and the application is not limited herein.

In some alternative embodiments, the arc ignition portion 22 includes two arc ignition subsections 23 disposed opposite in the first direction a, the two arc ignition subsections 23 respectively extending in directions away from each other.

So set up, then no matter which one of two opposite arc extinguishing areas of first direction A is introduced to electric arc, electric arc can both be introduced fast in the corresponding arc extinguishing area, has improved striking speed for arc extinguishing efficiency.

Optionally, an included angle formed by the orthographic projection of the arc-striking sub-portion 23 on the first plane and the second direction B is a right angle. Of course, the included angle formed by the orthographic projection of the arc-striking sub-portion 23 on the first plane and the second direction B can be other angles. For example, the angle formed by the orthographic projection of the two arc ignition subsections 23 on the first plane and the second direction B is 50-80 ° and extends to one side close to the center of the movable contact 2. In this way, the extending direction of the arc striking sub-portion 23 directly points to the central position of each arc extinguishing zone when the arc striking sub-portion abuts against the arc striking plate, so that the arc can be more quickly introduced into the central position of the arc extinguishing component 3.

The process of the arc entering the first arc extinguishing zone 31 is explained in detail below:

when the moving contact 2 and the first fixed contact 11 are just separated, arc roots of electric arcs are respectively generated on the moving contact and the first fixed contact;

when the moving contact 2 is further separated from the first fixed contact 11, the arc root on the first fixed contact 11 is transferred to the upper arc striking plate 36, and the arc is positioned between the upper arc striking plate 36 and the contact body 21 of the moving contact 2;

when the moving contact 2 is further separated from the first fixed contact 11, the arc is positioned between the upper arc striking plate 36 and the arc striking part 22 of the moving contact 2;

when the movable contact 2 is completely separated from the first stationary contact 11, the arc striking portion 22 abuts against the arc striking member 35, the arc root on the movable contact 2 is transferred to the arc striking member 35, and the arc is divided and extinguished in the first arc extinguishing zone 31.

Fig. 13 illustrates a cross-sectional view of a contact arc extinguishing system according to an embodiment of the present application, and fig. 14 illustrates a structural schematic view of the arc extinguishing system according to an embodiment of the present application.

Referring to fig. 13 and 14, in some alternative embodiments, the transfer device 4 includes a first permanent magnet 41 and a second permanent magnet 42, and the first permanent magnet 41 and the second permanent magnet 42 are both arc-shaped structures and are oppositely disposed along the center of the movable contact 2.

The first permanent magnet 41 and the second permanent magnet 42 adopt arc structures, so that the magnetic field is more concentrated in the arc extinguishing assembly 3, and the magnetic field density distributed inwards towards the center position is achieved, so that the first permanent magnet 41 and the second permanent magnet 42 act on the arc extinguishing assembly 3 in the smallest size as possible, and more magnetic lines of force of the magnetic field act on the moving path of the arc.

The first permanent magnet 41 and the second permanent magnet 42 are arranged around the outer sides of the moving contact 2 and the arc extinguishing assembly 3 to form a semi-enclosed structure, a magnetic field is formed in a space enclosed by the first permanent magnet 41 and the second permanent magnet 42, the coverage area of the magnetic field is positively correlated with the radian size of the first permanent magnet 41 and the second permanent magnet 42, namely, the radian of the first permanent magnet 41 and the second permanent magnet 42 is larger, and the coverage area of the magnetic field is more. Optionally, the central angle of the first permanent magnet 41 and the second permanent magnet 42 is greater than or equal to 90 °, so that most of the arc extinguishing assemblies 3 are located in the magnetic field coverage range while the entire contact system is located in the magnetic field coverage range, thereby ensuring that the magnetic field completely covers the movement path of the arc.

Optionally, the first permanent magnet 41 and the second permanent magnet 42 are arc tile-shaped sheet structures, and the raw material is neodymium iron boron or ferrite.

Fig. 15 shows a schematic diagram of a distribution of the lorentz forces to which the arc is subjected in the contact quenching system shown in fig. 13, and fig. 16 shows a schematic diagram of another distribution of the lorentz forces to which the arc is subjected in the contact quenching system shown in fig. 13.

Referring to fig. 15 and 16, in some alternative embodiments, in a first plane parallel to a contact plane of the movable contact 2 and the stationary contact 1, a direction of a maximum magnetic induction line 43 between the first permanent magnet 41 and the second permanent magnet 42 is parallel to a second direction B, and an orthographic projection of the maximum magnetic induction line on the first plane through a center of the stationary contact 1, where the second direction B is perpendicular to the first direction a in the first plane parallel to the contact plane of the movable contact 2 and the stationary contact 1.

Alternatively, the first permanent magnet 41 and the second permanent magnet 42 are symmetrical to each other.

It should be noted that the orthographic projection of the static contact 1 on the first plane is a plurality of concentric rings nested with each other, so the orthographic projection of the center of the static contact 1 on the first plane is the center of the circle, and the orthographic projection of the maximum magnetic induction line 43 on the first plane is parallel to the second direction B and passes through the center of the circle.

By the arrangement, the use adaptability of the contact arc extinguishing system is improved, and the contact arc extinguishing system can be accessed even if the anode and the cathode of an external circuit are not known, so that the major circuit safety problem caused by failure of the contact arc extinguishing system due to the fact that the anode and the cathode are reversely connected is avoided.

Next, the detailed structure and principle of the arc extinguishing contact system provided by the embodiment of the present application will be described in detail with reference to fig. 15 and 16.

A rectangular coordinate system is established by taking a first plane parallel to a contact plane of the moving contact 2 and the static contact 1 as a horizontal plane, taking a second direction B where a connecting line passing through the center of the first static contact 11 and the center of the second static contact 12 is located as an X axis, and taking a first direction A vertical to the X axis as a Y axis.

The four arc extinguishing zones are located on the outer peripheral side of the relative movement area of the moving contact 2 and the stationary contact 1, that is, in a top plane as shown in the figure, the first arc extinguishing zone 31 and the second arc extinguishing zone 32 are located on two sides of the first stationary contact 11 along the X-axis direction, and the third arc extinguishing zone 33 and the fourth arc extinguishing zone 34 are located on two sides of the second stationary contact 12 along the X-axis direction. The first permanent magnet 41 and the second permanent magnet 42 are disposed on the outer peripheral side of the arc extinguishing assembly 3. It should be noted that the outer peripheral side mentioned in this embodiment is not limited to the outer side of a specific circumferential structure, as long as one is located outside the other and the orthographic projections of the two in the first plane do not overlap.

As shown in fig. 15, if the first stationary contact 11 located on the negative half axis of the X-axis is connected to the positive electrode and the second stationary contact 12 located on the positive half axis of the X-axis is connected to the negative electrode, the direction of the return current of the contactor is from the first stationary contact 11 on the negative half axis of the X-axis to the movable contact 2, and then from the movable contact 2 to the second stationary contact 12 on the positive half axis of the X-axis. That is, the direction of the arc current between the first fixed contact 11 and the movable contact 2 on the left side in the figure is through the contact plane, and the direction of the arc current between the second fixed contact 12 and the movable contact 2 on the right side is out of the contact plane. Assuming that the side of the first permanent magnet 41 on the left side of the Y axis facing the first fixed contact 11 is the S pole, and the side of the second permanent magnet 42 on the right side of the Y axis facing the second fixed contact 12 is the N pole, the magnetic field direction is approximately from the right to the left. According to fleming's left-hand rule, an arc generated by separating the moving contact 2 from the first fixed contact 11 is pulled away from a space between the moving contact 2 and the first fixed contact 11 under the action of lorentz force, and the arc is transferred to a first arc extinguishing zone 31 located in a second quadrant; an arc generated by the separation of the movable contact 2 from the second stationary contact 12 is pulled away from the space between the movable contact 2 and the second stationary contact 12 under the action of the lorentz force, and the arc is transferred to a fourth arcing zone 34 located in the fourth quadrant.

It should be noted that a second direction B where a connection line between the center of the first stationary contact 11 and the center of the second stationary contact 12 is located is an X-axis direction, and a maximum magnetic induction line 43 in the magnetic fields generated by the first permanent magnet 41 and the second permanent magnet 42 coincides with the X-axis. In general, the maximum magnetic induction line 43 is the position where the magnetic field is most concentrated, and the lorentz force applied to the arc is the greatest at the position where the maximum magnetic induction line 43 is located, that is, where the magnetic field has the greatest influence on the arc deflection direction. Therefore, the deflection range of the arc under the action of the lorentz force F can be determined according to the value range of the included angle between the maximum magnetic induction line 43 and the X axis, namely the second direction B.

As shown in fig. 16, if the first stationary contact 11 located on the negative half axis side of the X-axis is connected to the negative electrode, and the second stationary contact 12 located on the positive half axis side of the X-axis is connected to the positive electrode, the direction of the return current of the contactor is from the second stationary contact 12 on the positive half axis side of the X-axis to the movable contact 2, and then from the movable contact 2 to the first stationary contact 11 on the negative half axis side of the X-axis. That is, the direction of the arc current between the first fixed contact 11 and the movable contact 2 on the left side in the figure passes through the contact plane, and the direction of the arc current between the second fixed contact 12 and the movable contact 2 on the right side passes through the contact plane. Assuming that the side of the first permanent magnet 41 on the left side of the Y axis facing the first stationary contact 11 is the S pole and the side of the second permanent magnet 42 on the right side of the Y axis facing the second stationary contact 12 is the N pole, the magnetic field direction is approximately from right to left. According to fleming's left-hand rule, an arc generated by separating the moving contact 2 from the first fixed contact 11 is pulled away from a space between the moving contact 2 and the first fixed contact 11 under the action of lorentz force, and the arc is transferred to a second arc extinguishing area 32 located in a third quadrant; an arc generated by the separation of the movable contact 2 from the second stationary contact 12 is pulled away from a space between the movable contact 2 and the second stationary contact 12 under the action of the lorentz force, and the arc is transferred to a third arc extinguishing area 33 located in the first quadrant.

In the above arrangement, the direction of the maximum magnetic induction line 43 is parallel to the second direction B, and the direction of the lorentz force is parallel to the Y axis, or extends in the positive direction of the Y axis, or extends in the negative direction of the Y axis, according to the fleming's left-hand rule. Therefore, no matter how the direction of the arc current is, that is, no matter what the positive and negative electrodes of the first and second

fixed contacts

11 and 12 are connected, the magnetic field between the first and second

permanent magnets

41 and 42 can blow the arc into the corresponding arc extinguishing region, that is, the arc between the first and second

fixed contacts

11 and 2 can be blown into any one of the first or second

arc extinguishing regions

31 and 32, and the arc between the second fixed contact 12 and the movable contact 2 can be blown into any one of the third or fourth

arc extinguishing regions

33 and 34, so as to achieve arc extinguishing.

Therefore, no matter which of the first static contact 11 and the second static contact 12 is connected with the positive electrode or the negative electrode, the function of the contact arc extinguishing system is not affected, namely, the non-polar connection of the contact arc extinguishing system is realized, the universality of the use of the contact arc extinguishing system is greatly increased, and the use experience of a user is improved.

Fig. 17 illustrates a distribution diagram of a magnetic field generated by a transfer device of a contact arc extinguishing system according to an embodiment of the present application, and fig. 18 illustrates a distribution diagram of a magnetic field generated by a transfer device of a contact arc extinguishing system according to an embodiment of the present application.

Referring to fig. 17 and 18, in some alternative embodiments, in a first plane parallel to a contact plane of the movable contact 2 and the stationary contact 1, an included angle α between a direction of a maximum magnetic induction line 43 between the first permanent magnet 41 and the second permanent magnet 42 and a second direction B is in a range of 0 ° < α ≦ 60 °, and a forward projection of the maximum magnetic induction line 43 passing through a midpoint of a central connection line of the first stationary contact 11 and the second stationary contact 12 on the first plane, where in the first plane parallel to the contact plane of the movable contact 2 and the stationary contact 1, the second direction B is perpendicular to the first direction a.

It should be noted that the orthographic projections of the first fixed contact 11 and the second fixed contact 12 on the first plane are a plurality of concentric circles nested with each other, so the orthographic projections of the centers of the first fixed contact 11 and the second fixed contact 12 on the first plane are the centers of the circles, a line between the two centers of the circles forms a line segment, and the orthographic projection of the maximum magnetic induction line 43 on the first plane passes through the midpoint of the line segment.

A rectangular coordinate system is established in the above manner, taking a first plane parallel to a contact plane of the moving contact 2 and the static contact 1 as a horizontal plane, taking a second direction B where a connection line passing through the center of the first static contact 11 and the center of the second static contact 12 is located as an X axis, and taking a first direction a perpendicular to the X axis as a Y axis.

As shown in fig. 17, if the first stationary contact 11 located on the negative half axis of the X-axis is connected to the positive electrode and the second stationary contact 12 located on the positive half axis of the X-axis is connected to the negative electrode, the direction of the return current of the contactor is from the first stationary contact 11 on the negative half axis of the X-axis to the movable contact 2, and then from the movable contact 2 to the second stationary contact 12 on the positive half axis of the X-axis. That is, the direction of the arc current between the first fixed contact 11 and the movable contact 2 on the left side in the figure is through the contact plane, and the direction of the arc current between the second fixed contact 12 and the movable contact 2 on the right side is out of the contact plane. Assuming that the side of the first permanent magnet 41 on the left side of the Y axis facing the first fixed contact 11 is an S pole, and the side of the second permanent magnet 42 on the right side of the Y axis facing the second fixed contact 12 is an N pole, the magnetic field direction is from right to left, and forms the above-mentioned included angle α with the X axis direction. According to fleming's left-hand rule, an arc generated by separating the moving contact 2 from the first fixed contact 11 is pulled away from a space between the moving contact 2 and the first fixed contact 11 under the action of lorentz force, and the arc blows into a first arc extinguishing area 31 of the second quadrant at an oblique angle; an arc generated by the separation of the movable contact 2 from the second fixed contact 12 is pulled away from a space between the movable contact 2 and the second fixed contact 12 under the action of the lorentz force, and the arc blows into a fourth arc extinguishing area 34 of a fourth quadrant in an oblique angle.

In general, the maximum magnetic induction line 43 is the position where the magnetic field is most concentrated, and the lorentz force applied to the arc is the greatest at the position where the maximum magnetic induction line 43 is located, that is, where the magnetic field has the greatest influence on the arc deflection direction. Therefore, the deflection range of the arc under the action of the lorentz force can be determined according to the value range of the included angle between the maximum magnetic induction line 43 and the X axis, namely the second direction B.

In the above arrangement, the maximum magnetic induction line 43 forms an included angle α with the X-axis direction, and the direction extends upward and leftward, according to the left-hand rule, the direction of the lorentz force applied to the arc between the first fixed contact 11 and the movable contact 2 is an included angle of 90 ° - α with the positive direction of the X-axis, and extends toward the positive direction of the Y-axis, so that the arc between the first fixed contact 11 and the movable contact 2 enters the first arc extinguishing zone 31 under the action of the magnetic field; the direction of the lorentz force applied to the arc between the second fixed contact 12 and the movable contact 2 is an included angle of 90 degrees to alpha degrees with the negative direction of the X axis, and extends towards the negative direction of the Y axis, so that the arc between the second fixed contact 12 and the movable contact 2 enters the fourth arc extinguishing area 34 under the action of a magnetic field.

Because the extension directions of the first arc extinguishing zone 31 and the fourth arc extinguishing zone 34 are both close to the Y axis from the arc striking part 22 of the movable contact 2, the arc blows into the first arc extinguishing zone 31 and the fourth arc extinguishing zone 34 at an oblique angle under the action of lorentz force, the arc can be blown into the positions of the first arc extinguishing zone 31 and the fourth arc extinguishing zone 34 close to the Y axis as much as possible, namely the deep part of the arc extinguishing component 3, so that the arc is elongated, compared with the scheme that the direction of the maximum magnetic induction line 43 is parallel to the X axis, the cutting path of the arc blown into the first arc extinguishing zone 31 and the fourth arc extinguishing zone 34 is changed, the contact area between the arc and the arc extinguishing grid piece 37 is increased, the diffusion and cooling effects of the arc in the arc extinguishing component 3 are enhanced, the arc extinguishing time is shortened, and the reliability of the contactor is improved.

As shown in fig. 18, assuming that the first static contact 11 located on the negative half axis of the X-axis is connected to the negative electrode, and the second static contact 12 located on the positive half axis of the X-axis is connected to the positive electrode, similarly, according to fleming's left-hand rule, the arc generated by separating the movable contact 2 from the first static contact 11 blows into the second arc extinguishing area 32 of the third quadrant at an oblique angle under the action of lorentz force; an arc generated by the separation of the movable contact 2 from the second fixed contact 12 blows into the fourth arc extinguishing area 34 of the first quadrant in an oblique angle under the action of the lorentz force.

In the above arrangement, since the polarities of the electrodes connected to the first fixed contact 11 and the second fixed contact 12 are changed with respect to fig. 17, in order to blow the arc into the arc extinguishing assembly 3, the direction of the magnetic field needs to be changed, that is, the positions of the first permanent magnet 41 and the second permanent magnet 42 need to be changed, so that the maximum magnetic induction line 43 between the first permanent magnet 41 and the second permanent magnet 42 still forms an included angle α with the X-axis direction, and the direction extends downward and leftward.

In this way, the direction of the lorentz force applied to the arc between the first fixed contact 11 and the movable contact 2 is an included angle of 90 ° - α with the positive direction of the X axis, and extends towards the negative direction of the Y axis, so that the arc between the first fixed contact 11 and the movable contact 2 enters the second arc extinguishing zone 32 under the action of the magnetic field; the direction of the lorentz force applied to the arc between the second fixed contact 12 and the movable contact 2 is an included angle of 90 degrees to alpha degrees with the negative direction of the X axis, and extends towards the positive direction of the Y axis, so that the arc between the second fixed contact 12 and the movable contact 2 enters the third arc extinguishing area 33 under the action of a magnetic field. The effect of the magnetic field is similar to that described above and will not be described in detail herein.

In alternative embodiments, the included angle α can range from 15 ° α to 30 °. The included angle is set between 15 degrees and 30 degrees, and the included angle between the Lorentz force and the X axis is 60 degrees to 75 degrees. The electric arc between static contact 1 and the moving contact 2 can be blown to the depths of each arc extinguishing area under the effect of this lorentz force, more be close to the position of Y axle promptly, and then the electric arc is elongated to the at utmost, strengthens diffusion and the cooling effect of electric arc in arc extinguishing component 3, shortens the arc extinguishing time.

Fig. 19 illustrates a schematic structural view of a contactor according to an embodiment of the present application, fig. 20 illustrates a top view of the contactor illustrated in fig. 19, and fig. 21 illustrates another top view of the contactor illustrated in fig. 19.

Referring to fig. 19-21, in some alternative embodiments, the contact arc extinguishing system further includes an adjusting device 5, and the adjusting device 5 can adjust a range of the transfer device 4 enveloping the arc extinguishing assembly 3.

In the above, the direction of the maximum magnetic induction line 43 of the first permanent magnet 41 and the second permanent magnet 42 forms an angle α with the second direction B, so that the arc can enter the arc extinguishing assembly 3 deep, thereby lengthening the arc. In this way, in order to enable any one of the first static contact 11 and the second static contact 12 to be connected to both the positive electrode and the negative electrode, the adjusting device 5 needs to be arranged to adjust the direction of the magnetic field between the first permanent magnet 41 and the second permanent magnet 42, so that the generated electric arc can enter the deep part of the arc extinguishing assembly 3 no matter who the first static contact 11 and the second static contact 12 are connected to the positive electrode or the negative electrode, the electric arc is lengthened, and the arc extinguishing time is shortened.

In some optional embodiments, the adjusting device 5 includes a first handle 51 and a second handle 52, an orthographic projection of the first handle 51 on the first plane and an orthographic projection of the second handle 52 on the first plane are oppositely disposed along an orthographic projection of the center of the movable contact 2 on the first plane, the first permanent magnet 41 includes a first end 411 and a second end 412 that are opposite in self-bending direction, the second permanent magnet 42 includes a third end 421 and a fourth end 422 that are opposite in self-bending direction, the first end 411 is adjacent to the third end 421, the second end 412 is adjacent to the fourth end 422, the first handle 51 is disposed between the first end 411 and the third end 421, the second handle 52 is disposed between the second end 412 and the fourth end 422, and both the first handle 51 and the second handle 52 can drive the first permanent magnet 41 and the second permanent magnet 42 to rotate to change the magnetic field direction.

It should be noted that the first handle 51 is disposed between the first end 411 and the third end 421, and the second handle 52 is disposed between the second end 412 and the fourth end 422, which does not mean that the first handle 51 is connected to the first end 411 and the third end 421, and the second handle 52 is connected to the second end 412 and the fourth end 422, the connection relationship between the first handle 51 and the first end 411 and the third end 421 is not limited, the first handle 51 and the first end 411 and the third end 421 may have a gap, and similarly, the second handle 52 and the second end 412 and the fourth end 422 may have a gap.

The first handle 51 and the second handle 52 are arranged, and when the first permanent magnet 41 and the second permanent magnet 42 need to be rotated to change the direction of the magnetic field, the first handle 51 and the second handle 52 can be rotated. Specifically, as shown in fig. 20, when the side of the first permanent magnet 41 on the left side facing the contact system is an N pole, the side of the second permanent magnet 42 on the right side facing the contact system is an S pole, and the second stationary contact 12 on the right side is connected to the positive pole, and the first stationary contact 11 on the left side is connected to the negative pole, the first handle 51 and the second handle 52 are rotated rightward from the middle position, so that the maximum magnetic induction line 43 between the first permanent magnet 41 and the second permanent magnet 42 forms an included angle α with the second direction B. Similarly, as shown in fig. 21, when the first permanent magnet 41 on the left side is connected to the positive pole and the second permanent magnet 42 on the right side is connected to the negative pole, the first handle 51 and the second handle 52 are rotated to the left from the neutral position. Wherein the first handle 51 and the second handle 52 are opposite to each other along the first direction a when they are located at the intermediate position.

Optionally, the first handle 51 and the second handle 52 respectively have two ends opposite to each other in the moving direction thereof, one end of the first handle 51 abuts against the first end 411, and the other end of the first handle 51 abuts against the third end 421; one end of the second handle 52 abuts against the second end 412, and the other end of the second handle 52 abuts against the fourth end 422; either one of the first handle 51 and the second handle 52 can simultaneously rotate the first permanent magnet 41 and the second permanent magnet 42.

The first handle 51 and the second handle 52 are abutted to the first permanent magnet 41 and the second permanent magnet 42, and the arrangement mode is convenient for processing and manufacturing, and the first permanent magnet 41 and the second permanent magnet 42 can be rotated simultaneously by only pushing one handle, so that the operation is convenient.

In other alternative embodiments, one end of the first handle 51 is connected to the first end 411, and the other end of the first handle 51 is connected to the third end 421. One end of the second handle 52 is connected to the second end 412 and the other end of the second handle 52 is connected to the fourth end 422. Further alternatively, the first handle 51 and the second handle 52 are connected to the first permanent magnet 41 and the second permanent magnet 42 by adhesion.

Fig. 22 illustrates a schematic structure of an adjusting device of a contact arc extinguishing system according to an embodiment of the present application, fig. 23 illustrates a schematic structure of the adjusting device illustrated in fig. 22 at another angle, and fig. 24 illustrates a schematic structure of a housing of the contact arc extinguishing system of the contactor illustrated in fig. 19.

Referring to fig. 22, 23 and 24, in some alternative embodiments, the first handle 51 and the second handle 52 respectively include a handle body 53 and a clamping portion 54 connected to the handle body 53, the housing 6 has a clamping mating portion 631, the clamping portion 54 can be clamped with the clamping mating portion 631, when the clamping portion 54 is clamped with the clamping mating portion 631, the first permanent magnet 41 is in a first preset position, and the second permanent magnet 42 is in a second preset position. When the first permanent magnet 41 is in the first preset position and the second permanent magnet 42 is in the second preset position, the direction of the maximum magnetic induction line 43 of the first permanent magnet 41 and the second permanent magnet 42 forms an included angle α with the second direction B.

It should be noted that, because the included angle α formed by the maximum magnetic induction line 43 of the first permanent magnet 41 and the second permanent magnet 42 and the second direction B has two conditions, the first preset position and the second preset position have two, so that one clamping portion 54 is correspondingly inserted with two clamping matching portions 631, that is, one handle has two clamping positions.

Optionally, the clamping portion 54 is a buckle, and the clamping fitting portion 631 is a clamping slot or a clamping hole. Of course, the clamping portion 54 and the clamping mating portion 631 may have other structures, for example, the clamping portion 54 is a spring, and the clamping mating portion 631 is a clamping slot or a clamping hole, which is not limited herein.

Through setting up joint portion 54 and joint cooperation portion 631, first handle 51 and second handle 52 are rotatory when presetting the position with first permanent magnet 41 and second permanent magnet 42, then joint portion 54 and joint cooperation portion 631 joint each other, first handle 51 and second handle 52 can't continue the motion, first permanent magnet 41 and second permanent magnet 42 stop at preset position accurately, for the rotatory adjusting device 5 of user provides the basis, user's use experience has been promoted.

Optionally, the first handle 51 and the second handle 52 are beyond the transfer device 4 in the direction from the movable contact 2 to the stationary contact 1. Further optionally, the portion of the handle body 53 beyond the end face of the adjusting device 5 opposite to the moving direction is provided with stripes 55 at intervals, so as to increase the friction force during pushing.

In some alternative embodiments, the housing 6 comprises a housing body 61, a mounting portion 62 and a peripheral portion 63 which are nested in sequence, the housing body 61 being used for mounting the contact system and the arc extinguishing assembly 3, and the mounting portion 62 being used for mounting the transfer device 4. The mounting portion 62 includes a first arc-shaped slide rail 621 and a second arc-shaped slide rail 622, the orthographic projection of the first arc-shaped slide rail 621 on the first plane and the orthographic projection of the second arc-shaped slide rail 622 on the first plane are disposed oppositely along the center of the movable contact 2 on the orthographic projection of the first plane, the first permanent magnet 41 is slidably connected to the first arc-shaped slide rail 621, and the second permanent magnet 42 is slidably connected to the second arc-shaped slide rail 622.

Optionally, snap fit portion 631 is provided in peripheral portion 63.

Optionally, the housing body 61 is formed with a receiving cavity for receiving the movable contact 2 and the arc extinguishing assembly 3, and the receiving cavity is communicated with the insertion hole 616.

The first curved slide 621 and the second curved slide 622 are configured such that the transfer device 4 is slidably coupled to the curved slides to reduce friction between the transfer device 4 and the housing 6, thereby facilitating rotation of the transfer device 4 by the first handle 51 and the second handle 52.

In some alternative embodiments, the surface of the case body 61 facing the transfer device 4 is provided with a plurality of protrusions 617. Alternatively, a plurality of protrusions 617 are provided at intervals in the circumferential direction of the case body 61. Of course, the protrusion 617 may also extend along the circumferential direction of the shell body 61, and the application is not limited thereto.

Set up many archs 617 at the surface of shell body 61 towards transfer device 4, can reduce transfer device 4 and shell body 61's frictional force at rotatory in-process, be convenient for user rotation adjusting device 5, and then promote user experience.

Fig. 25 is a partial structural view of the contactor of fig. 19, and fig. 26 is a partial structural view of the contactor of fig. 19.

Referring to fig. 24, 25 and 26, in some optional embodiments, the mounting portion 62 further includes a first boss 623 and a second boss 624, a first gap is formed between one end of the first arc-shaped slide rail 621 and one end of the second arc-shaped slide rail 622, a second gap is formed between the other end of the first arc-shaped slide rail 621 and the other end of the second arc-shaped slide rail 622, the first boss 623 is disposed in the first gap, the second boss 624 is disposed in the second gap, and the first boss 623 and the second boss 624 are used for limiting the first permanent magnet 41 to the first arc-shaped slide rail 621 and limiting the second permanent magnet 42 to the second arc-shaped slide rail 622; wherein the first handle 51 is slidably connected to the first boss 623 and the second handle 52 is slidably connected to the second boss 624.

Alternatively, the orthographic projection of the first boss 623 and the orthographic projection of the second boss 624 on the first plane are symmetrical to each other.

Set up first boss 623 and second boss 624, spacing first permanent magnet 41 in first arc slide 621, spacing second permanent magnet 42 in second arc slide 622, avoid first permanent magnet 41 and second permanent magnet 42 in the use position exchange, lead to the magnetic field direction mistake, the unable entering arc extinguishing assembly 3 depths of electric arc between moving contact 2 and the static contact 1, the condition of being close to the position of Y axle takes place promptly, guarantees the arc extinguishing ability of arc extinguishing assembly 3.

In some optional embodiments, a first identification portion 511 is disposed on a surface of the first handle 51, a second identification portion 521 is disposed on a surface of the second handle 52, when the first permanent magnet 41 rotates to a first preset position and the second permanent magnet 42 rotates to a second preset position, the first identification portion 511 indicates a polarity of the stationary contact 1 closest to the first handle 51, and the second identification portion 521 indicates a polarity of the stationary contact 1 closest to the second handle 52, where when the first permanent magnet 41 is in the first preset position and the second permanent magnet 42 is in the second preset position, an included angle α is formed between directions of maximum magnetic induction lines 43 of the first permanent magnet 41 and the second permanent magnet 42 and the second direction B.

One of the first and

second markers

511 and 521 indicates a positive electrode and the other indicates a negative electrode. Optionally, the positive sign is "+" and the negative sign is "-". Of course, other labels may be used, such as the characters "positive" and "negative", and the present application is not limited thereto.

Because the orthographic projection of the first handle 51 on the first plane and the orthographic projection of the second handle 52 on the first plane are oppositely arranged along the orthographic projection of the center of the movable contact 2 on the first plane, when the direction of the maximum magnetic induction line 43 of the first permanent magnet 41 and the second permanent magnet 42 forms an included angle α with the second direction B, one of the first handle 51 and the second handle 52 is inevitably close to the first fixed contact 11, and the other is close to the second fixed contact 12, so that the first handle 51 and the second handle 52 can indicate the polarity of the fixed contact 1 closest to each other.

Optionally, the number of the first identification parts 511 is two, and two first identification parts 511 are located at two ends of the first handle 51 in the moving direction.

Optionally, the number of the second identification parts 521 is two, and two second identification parts 521 are located at two ends of the second handle 52 in the moving direction.

In this way, when the first permanent magnet 41 is located at the first preset position and the second permanent magnet 42 is located at the second preset position, one of the two first identification portions 511 and one of the two second identification portions 521 are respectively located at a position close to the corresponding static contact 1, so that the user can watch the static contact conveniently.

Optionally, the surface of the shell body 61 is provided with a third identification portion 611 and a fourth identification portion 612, the third identification portion 611 and the fourth identification portion 612 are located on two opposite sides of the static contact 1 in the first direction a, the surface of the first handle 51 is further provided with a fifth identification portion 512, the surface of the second handle 52 is further provided with a sixth identification portion 522, when the first permanent magnet 41 rotates to the first preset position and the second permanent magnet 42 rotates to the second preset position, the fifth identification portion 512 is aligned with the third identification portion 611, and the sixth identification portion 522 is aligned with the fourth identification portion 612.

Optionally, the third identification portion 611 includes two first identification sub-portions 613, which correspond to the first fixed contact 11 and the second fixed contact 12. The fifth identification part 512 includes two second identification sub-parts 513, and the two second identification sub-parts 513 are located at both ends of the first handle 51 in the moving direction. When the first permanent magnet 41 rotates to one of the first preset positions and the second permanent magnet 42 rotates to one of the two positions of the second preset position corresponding to the first preset position, one of the first identification subdivisions 613 and one of the second identification subdivisions 513 are aligned; when the first permanent magnet 41 is rotated to another position of the first preset bit and the second permanent magnet 42 is rotated to a position corresponding to the first preset bit among two positions of the second preset bit, the other first identification sub-part 613 and the other second identification sub-part 513 are aligned.

Likewise, the fourth identification portion 612 includes two third identification sub-portions 614, one for one corresponding to the first fixed contact 11 and the second fixed contact 12. The sixth identification part 522 includes two fourth identification sub-parts 523, and the two fourth identification sub-parts 523 are located at both ends of the second handle 52 in the moving direction. When the first permanent magnet 41 rotates to one of the first preset positions and the second permanent magnet 42 rotates to one of the two second preset positions corresponding to the first preset position, one of the third identification subparts 614 is aligned with one of the fourth identification subparts 523; when the first permanent magnet 41 is rotated to another position of the first preset bit and the second permanent magnet 42 is rotated to a position corresponding to the first preset bit among two positions of the second preset bit, another third identification sub-section 614 and another fourth identification sub-section 523 are aligned.

Further alternatively, the first identification subsection 613 is a portion of a pattern and the second identification subsection 513 is another portion of the pattern, which when aligned, form a complete pattern. The complete figure can be a figure such as an arrow, a circle, a heart and the like. Likewise, the third and fourth sub-portions 614, 523 also form a complete figure when aligned.

The first identification subsection 613 and the second identification subsection 513 can be aligned. The third identification subpart 614 and the fourth identification subpart 523 can be aligned, so that a user can rotate according to the identification to judge whether the transfer device 4 rotates to a preset position, thereby facilitating the operation of the user and improving the user experience.

The embodiment of the application also provides a contactor, which comprises the contact arc extinguishing system.

While the present application has been described with reference to preferred embodiments, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the present application, and particularly, features described in connection with the embodiments may be combined in any manner as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims

1. The utility model provides a contact arc extinguishing system of contactor, includes contact system and arc extinguishing system, the contact system includes static contact and moving contact, the moving contact with the static contact detachable contact can produce electric arc when separating, its characterized in that, the arc extinguishing system include the casing and be located in the casing:

the arc extinguishing assembly comprises a first arc extinguishing zone and a second arc extinguishing zone which are positioned on two sides of the contact system, and the first arc extinguishing zone and the second arc extinguishing zone are oppositely arranged in a first direction;

the transfer device is positioned on the outer peripheral side of the arc extinguishing assembly and generates a magnetic field, and the electric arc is transferred to the arc extinguishing assembly under the action of the magnetic field;

when the moving contact is separated from the fixed contact, the transfer device can transfer the electric arc to the first arc extinguishing area or the second arc extinguishing area according to the current direction.

2. The contact arc extinguishing system of claim 1, wherein the stationary contact comprises a first stationary contact and a second stationary contact, the first stationary contact and the second stationary contact being disposed opposite to each other in a second direction,

the arc extinguishing assembly further comprises a third arc extinguishing zone and a fourth arc extinguishing zone, and the third arc extinguishing zone and the fourth arc extinguishing zone are arranged oppositely in the first direction;

the first arc extinguishing area and the second arc extinguishing area are positioned on two sides of the first fixed contact in the first direction, and the third arc extinguishing area and the fourth arc extinguishing area are positioned on two sides of the second fixed contact in the first direction;

the first arc extinguishing zone and the third arc extinguishing zone are positioned at the same side of the static contact and are arranged in an insulating way, the second arc extinguishing zone and the fourth arc extinguishing zone are positioned at the other side of the static contact and are arranged in an insulating way,

when the moving contact is separated from the fixed contact, the electric arc between the first fixed contact and the moving contact is transferred to a first arc extinguishing zone or a second arc extinguishing zone, and correspondingly, the electric arc between the second fixed contact and the moving contact is transferred to a fourth arc extinguishing zone or a third arc extinguishing zone;

and in a first plane parallel to the contact planes of the fixed contact and the movable contact, the first direction is vertical to the second direction.

3. The contact arc extinguishing system according to claim 1 or 2, wherein the arc extinguishing assembly further comprises an arc striking member for transferring an arc root of the movable contact into the arc extinguishing assembly during separation of the movable contact from the stationary contact.

4. The contact arc extinguishing system of claim 3, wherein the movable contact comprises a contact body and an arc striking portion connected to an end of the contact body, the arc striking portion extending from the end of the contact body to a side away from the stationary contact and transferring an arc root of the movable contact to the arc striking member.

5. The contact arc quenching system according to claim 4, wherein the arc ignition portion comprises two arc ignition subsections oppositely arranged in the first direction, the two arc ignition subsections respectively extending in directions away from each other.

6. The contact arc extinguishing system of claim 2, wherein the transfer device comprises a first permanent magnet and a second permanent magnet, the first permanent magnet and the second permanent magnet are both arc-shaped structures and are oppositely arranged along the center of the moving contact.

7. The contact arc extinguishing system according to claim 6, wherein in a first plane parallel to a contact plane of the movable contact and the fixed contact, a direction of a line of maximum magnetic induction between the first permanent magnet and the second permanent magnet is parallel to a second direction and passes through an orthographic projection of a center of the fixed contact on the first plane,

the second direction is perpendicular to the first direction in a first plane parallel to a contact plane of the moving contact and the fixed contact.

8. The contact arc extinguishing system according to claim 6, wherein in a first plane parallel to a contact plane of the movable contact and the fixed contact, an included angle α between a direction of a maximum magnetic induction line between the first permanent magnet and the second permanent magnet and a second direction is in a range of 0 ° < α ≦ 60 °, and a forward projection of a midpoint of a central connecting line of the maximum magnetic induction line passing through the first fixed contact and the second fixed contact on the first plane,

9. The contact arc quenching system of claim 8, wherein said included angle α is in the range of 15 ° α to 30 °.

10. The contact quenching system of claim 8, further comprising an adjustment device capable of adjusting a range of the diverting device enveloping the quenching assembly.

11. The contact arc extinguishing system according to claim 10, wherein the adjusting device comprises a first handle and a second handle, an orthographic projection of the first handle on the first plane and an orthographic projection of the second handle on the first plane are oppositely arranged along an orthographic projection of the center of the movable contact on the first plane,

the first permanent magnet comprises a first end and a second end which are opposite to each other in the self bending direction, the second permanent magnet comprises a third end and a fourth end which are opposite to each other in the self bending direction, the first end and the third end are adjacent, the second end and the fourth end are adjacent,

the first handle is arranged between the first end and the third end, the second handle is arranged between the second end and the fourth end, and both the first handle and the second handle can drive the first permanent magnet and the second permanent magnet to rotate.

12. The contact arc extinguishing system according to claim 11, wherein the first handle and the second handle respectively comprise a handle body and a clamping portion connected to the handle body, the housing has a clamping fit portion, the clamping portion can be clamped with the clamping fit portion, when the clamping portion is clamped with the clamping fit portion, the first permanent magnet is in a first preset position, the second permanent magnet is in a second preset position,

when the first permanent magnet is located at the first preset position and the second permanent magnet is located at the second preset position, the included angle alpha is formed between the direction of the maximum magnetic induction line of the first permanent magnet and the direction of the maximum magnetic induction line of the second permanent magnet and the second direction.

13. The contact arc quenching system of claim 11, wherein the housing comprises a housing body, a mounting portion and an outer peripheral portion, the housing body, the mounting portion and the outer peripheral portion being nested in sequence, the housing body being configured to mount the contact system and the arc quenching assembly, the mounting portion being configured to mount the transfer device;

the installation part comprises a first arc-shaped slide rail and a second arc-shaped slide rail, the orthographic projection of the first plane of the first arc-shaped slide rail and the orthographic projection of the second arc-shaped slide rail of the first plane are oppositely arranged along the center of the movable contact, the first permanent magnet is connected with the first arc-shaped slide rail in a sliding mode, and the second permanent magnet is connected with the second arc-shaped slide rail in a sliding mode.

14. The contact arc extinguishing system according to claim 13, wherein the mounting portion further comprises a first boss and a second boss, a first gap is formed between one end of the first arc-shaped slide rail and one end of the second arc-shaped slide rail, a second gap is formed between the other end of the first arc-shaped slide rail and the other end of the second arc-shaped slide rail, the first boss is arranged in the first gap, the second boss is arranged in the second gap, and the first boss and the second boss are used for limiting the first permanent magnet to the first arc-shaped slide rail and limiting the second permanent magnet to the second arc-shaped slide rail;

wherein the first handle is slidably connected to the first boss and the second handle is slidably connected to the second boss.

15. The contact arc quenching system of claim 13, wherein a surface of the first handle is provided with a first identification portion, a surface of the second handle is provided with a second identification portion,

when the first permanent magnet rotates to a first preset position and the second permanent magnet rotates to a second preset position, the first identification part indicates the polarity of the static contact closest to the first handle, the second identification part indicates the polarity of the static contact closest to the second handle,

16. A contactor, characterized by comprising a contact quenching system according to any of claims 1-15.