CN117854976A - Electrical isolation switch, switching layer thereof and arc extinguishing method - Google Patents

Abstract

The application discloses electric isolating switch and switching layer and arc extinguishing method thereof, wherein, electric isolating switch utilizes the magnet arc extinguishing scheme to the magnetic field that the adjustment magnet formed is adjusted to the deployment mode through adjustment magnet, makes the magnetic field that the magnet formed forms many buckling arc extinguishing field, many buckling arc extinguishing field can carry out the buckling of different modes with elongating to the electric arc, accelerates the breaking and the extinction of electric arc, through such mode, reinforcing electric isolating switch's extinction ability.

Description

Electrical isolation switch, switching layer thereof and arc extinguishing method

Technical Field

The application relates to the field of switches, in particular to an electric isolating switch, a switch layer thereof and an arc extinguishing method.

Background

In recent years, the application of the direct current transmission system is more and more popular, and the direct current transmission system is developed towards high voltage and high current directions. The improvement of the voltage of the direct current transmission system brings the advantages of cost reduction, line active loss reduction, power generation efficiency improvement and the like for direct current transmission, and meanwhile, some hidden dangers are added to a certain extent, wherein the direct current arc fault is a typical potential safety hazard in direct current transmission.

For example, in a photovoltaic system, a direct current switch for controlling a photovoltaic panel and an inverter is provided with a static contact portion and a movable contact portion capable of moving relative to the static contact portion, and when a voltage and/or a current in a direct current circuit is greater than a preset range, an arc is formed between the movable contact portion of the direct current switch and an instant when the static contact portion is separated from the movable contact portion in a process of cutting off the conducted direct current circuit through the direct current switch. The greater the voltage or current in the dc circuit, the more arcs are generated during the opening of the dc circuit by the dc switch, which can damage surrounding equipment if the arcs continue to burn, and even cause an explosion.

There are many arc extinguishing schemes, for example, increasing the diameter of the movable contact part to increase the opening distance to elongate the arc, accelerating the breaking speed, adding a magnet for arc extinguishing, etc. However, these arc extinguishing schemes have certain defects, for example, increasing the diameter of the movable contact portion can lead to an increase in the overall size of the dc switch, which is contrary to the current trend of miniaturization of the switch, the increase of the breaking speed has obvious speed limit, the increase of the breaking speed can lead to a decrease in the control stability and the service life of the dc switch, and the arc extinguishing effect of the additional magnet is not obvious, so that the application requirements cannot be met.

Thus, a new arc extinction scheme is desired.

Disclosure of Invention

An advantage of the present application is that it provides an electrical isolation switch, a switching layer thereof, and an arc extinguishing method, wherein the electrical isolation switch uses a magnet arc extinguishing scheme to extinguish the arc, and adjusts a magnetic field formed by a magnetic element by adjusting a deployment mode of the magnetic element, so that the magnetic field formed by the magnetic element can bend an arc in different modes to prolong a motion path of the arc, accelerate breaking and extinguishing of the arc, and in such a way, enhance an arc extinguishing capability of the electrical isolation switch.

Another advantage of the present application is to provide an electrical disconnector, and a switching layer and an arc extinguishing method thereof, in which an arc can be elongated by adjusting a deployment manner of the magnet, so that the electrical disconnector can enhance an arc extinguishing capability of the electrical disconnector without substantially increasing an overall size thereof or increasing an overall size thereof.

According to one aspect of the present application, there is provided a switching layer comprising: a bearing housing; a pair of stationary conductive elements mounted to the carrier housing and a movable contact conductive assembly, wherein the movable contact conductive assembly includes a movable contact conductive element movable relative to the pair of stationary conductive elements, the movable contact conductive element being adapted to be moved to selectively engage or disengage the pair of stationary conductive elements; a magnetic assembly for at least two modes of deflection of an arc generated during engagement or disengagement of the movable contact conductive element and the stationary contact conductive element; and at least one arc chute located in a deflection path of the arc; the magnetic assembly comprises a first magnetic element and a second magnetic element which are positioned on the motion path of the movable contact conductive element, and the magnetic pole orientation of the first magnetic element is different from the magnetic pole orientation of the second magnetic element.

In the switching layer according to the present application, the first magnetic element and the second magnetic element each correspond to a movement path of the movable contact conductive element in an axial direction set by the switching layer.

In the switching layer according to the present application, the first magnetic element has a first magnetic pole facing the movable contact conductive assembly and a second magnetic pole opposite to the first magnetic pole, and the second magnetic unit has a third magnetic pole facing the movable contact conductive assembly and a fourth magnetic pole opposite to the third magnetic pole.

In the switching layer according to the present application, the first pole of the first magnetic element is of opposite polarity to the third pole of the second magnetic element.

In a switching layer according to the present application, each of the pair of static conductive elements has a static conductive end, and the first magnetic element is located below the static conductive end of one of the pair of static conductive elements.

In the switching layer according to the present application, the first magnetic element is arranged eccentrically to the stationary contact terminal.

In the switching layer according to the present application, the first magnetic element has a first central axis, which corresponds to an edge region of the static contact conductive end.

In the switching layer according to the present application, the first pole of the first magnetic element is exposed to the carrier housing, and the third pole of the second magnetic element is enclosed within the carrier housing.

In the switch layer according to the present application, the carrying case has an assembly groove, the first magnetic element is fittingly mounted in the assembly groove, and a height dimension of the first magnetic element is equal to or greater than a depth dimension of the assembly groove.

In the switching layer according to the present application, the second magnetic element is kept insulated with respect to the pair of stationary contact conductive elements and the movable contact conductive assembly.

In the switching layer according to the present application, the bearing housing has a mounting groove concavely formed at a bottom surface thereof, and the second magnetic member is tightly fitted into the mounting groove.

In the switching layer according to the present application, the first magnetic element has a circular cross section and the second magnetic element has a sector-shaped cross section.

In the switching layer according to the present application, the magnetic assembly further comprises a third magnetic element adjacent to the second magnetic element, the third magnetic element having a pole orientation different from the pole orientation of the second magnetic element.

In the switching layer according to the present application, the magnetic pole orientation of the first magnetic element is opposite to the magnetic pole orientation of the second magnetic element, the magnetic pole orientation of the second magnetic element is opposite to the magnetic pole orientation of the third magnetic element, and the magnetic pole orientation of the first magnetic element is the same as the magnetic pole orientation of the third magnetic element.

In the switching layer according to the present application, the arc extinguishing grooves include a first arc extinguishing groove located at an outer side of the magnetic assembly and a second arc extinguishing groove located at an inner side of the magnetic assembly.

In a switching layer according to the present application, the arc chute comprises a third arc chute located between the first and second magnetic elements of the magnetic assembly.

In the switching layer according to the present application, the third arc chute is communicated between the first arc chute and the second arc chute.

According to another aspect of the present application, there is also provided an electrical isolation switch, comprising: at least one switching layer as described above; and an actuation control assembly operably connected to the at least one switching layer, wherein the actuation control assembly is configured to control the switching of the at least one switching layer between the closed state and the open state.

According to still another aspect of the present application, there is also provided an arc extinguishing method, including: disposing at least two magnetic elements on a motion path of the movable contact conductive element, wherein magnetic poles of at least two magnetic elements in the at least two magnetic elements are oriented differently so as to deflect at least two modes of electric arcs generated in the process of jointing or disconnecting the movable contact conductive element and the static contact conductive element; and providing at least one arc chute on a deflection path of the arc such that the arc is bent and directed to the arc chute.

Further objects and advantages of the present application will become fully apparent from the following description and the accompanying drawings.

These and other objects, features, and advantages of the present application will become more fully apparent from the following detailed description, the accompanying drawings, and the appended claims.

Drawings

The foregoing and other objects, features and advantages of the present application will become more apparent from the following more particular description of embodiments of the present application, as illustrated in the accompanying drawings. The accompanying drawings are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate the application and not constitute a limitation to the application. In the drawings, like reference numerals generally refer to like parts or steps.

Fig. 1 illustrates a schematic perspective view of the electrical isolation switch according to an embodiment of the present application.

Fig. 2 illustrates a schematic diagram of a partial explosion of the electrical isolation switch according to an embodiment of the present application.

Fig. 3 illustrates a schematic diagram of a switching layer of the electrical isolation switch according to an embodiment of the present application.

Fig. 4 illustrates a schematic view of a load-bearing housing of a switching layer of the electrical disconnector according to an embodiment of the present application.

Fig. 5 illustrates a state switching schematic of a switching layer of the electrical isolation switch according to an embodiment of the present application.

Fig. 6 illustrates another state switching schematic of the switching layer of the electrical isolation switch according to an embodiment of the present application.

Fig. 7 illustrates one deployment of the magnetic elements of the electrical isolation switch according to an embodiment of the present application.

Fig. 8 illustrates another deployment of the magnetic elements of the electrical isolation switch according to an embodiment of the present application.

Fig. 9 illustrates yet another deployment of the magnetic element of the electrical isolation switch according to an embodiment of the present application.

Fig. 10A illustrates the lorentz force trend of a magnetic element in one specific example of the electrical isolation switch according to an embodiment of the present application.

Fig. 10B illustrates a motion profile of an arc in one specific example of the electrical isolation switch according to an embodiment of the present application.

Fig. 11 illustrates a flow diagram of an arc extinguishing method according to an embodiment of the present application.

Detailed Description

Hereinafter, example embodiments according to the present application will be described in detail with reference to the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application and not all of the embodiments of the present application, and it should be understood that the present application is not limited by the example embodiments described herein.

Summary of the application

As described above, there are many schemes of arc extinction, for example, increasing the diameter of the movable contact portion to increase the opening distance to elongate the arc, increasing the breaking speed, adding a magnet for arc extinction, and the like. However, these arc extinguishing schemes have certain defects, for example, increasing the diameter of the movable contact portion can lead to an increase in the overall size of the dc switch, which is contrary to the current trend of miniaturization of the switch, the increase of the breaking speed has obvious speed limit, the increase of the breaking speed can lead to a decrease in the control stability and the service life of the dc switch, and the arc extinguishing effect of the additional magnet is not obvious, so that the application requirements cannot be met.

Thus, a new arc extinction scheme is desired.

Specifically, through the scheme research of the inventor of the application on the arc extinction of the magnet, the scheme research shows that: in the case of deflecting the arc by the magnet to elongate the arc and thus stretch-breaking the arc, in general, the arc is elongated in a specific direction by the deflection of the magnet to the arc, and in order to stretch the arc long and thin enough to stretch it off, the size of the housing of the dc switch in the specific direction is increased accordingly, which does not conform to the trend of miniaturization of the dc switch at present.

Based on this, the inventor of the present application proposes an electrical isolating switch, which attempts to improve the space utilization rate and the arc extinguishing performance of the electrical isolating switch by utilizing the principle that a curve in space is longer than a straight path. In particular, a particular magnetic field may exert a force on the arc in a particular direction, causing the arc to deflect in a particular manner. The magnetic field generating element (such as a magnet or a coil) can be deployed in the region where the electric arc is generated, and the magnetic field formed by the magnetic field generating element is adjusted by adjusting the deployment mode of the magnetic field generating element, so that the magnetic field formed by the magnetic field generating element forms a multi-bending arc extinguishing field, the electric arc is deflected in a plurality of different modes, and is guided to bend for a plurality of times so as to elongate the electric arc, and the breaking and the extinction of the electric arc are accelerated. Further, an arc extinguishing groove can be arranged around the magnetic element, the arc is guided to the arc extinguishing groove through the magnetic element, the arc is further elongated by utilizing the narrow slit principle, and the breaking and the extinguishing of the arc are accelerated.

Accordingly, the present application provides a switching layer comprising a carrier housing, a magnetic assembly, an arc chute, a pair of static contact conductive elements mounted to the carrier housing, and a movable contact conductive assembly, wherein the movable contact conductive assembly comprises a movable contact conductive element movable relative to the pair of static contact conductive elements, the movable contact conductive element being adapted to be moved to selectively engage or disengage the pair of static contact conductive elements, the magnetic assembly comprising a first magnetic element and a second magnetic element mounted to the carrier housing and located in a path of movement of the movable contact conductive elements, and a pole orientation of the first magnetic element being different from a pole orientation of the second magnetic element, the arc chute being located in a path of deflection of the arc.

The application also provides an electrical isolation switch, which comprises: at least one switching layer as described above and an actuation control assembly operatively connected to the at least one switching layer, wherein the actuation control assembly is configured to control the switching of the at least one switching layer between the closed state and the open state.

The application also provides an arc extinguishing method, which comprises the following steps: disposing at least two magnetic elements on a motion path of the movable contact conductive element, wherein magnetic poles of at least two magnetic elements in the at least two magnetic elements are oriented differently so as to deflect at least two modes of electric arcs generated in the process of jointing or disconnecting the movable contact conductive element and the static contact conductive element; and providing at least one arc chute on a deflection path of the arc such that the arc is bent and directed to the arc chute.

Having described the basic principles of the present application, various non-limiting embodiments of the present application will now be described in detail with reference to the accompanying drawings.

Schematic electrical disconnector

As shown in fig. 1 to 10B, the electrical isolating switch according to the embodiment of the present application is illustrated, which provides a novel arc extinguishing scheme, and can be widely applied in various situations, for example, in the dc power on-off process of a photovoltaic system.

Specifically, in the present embodiment, as shown in fig. 1, the electrical isolation switch includes at least one switch layer 10 and an actuation control assembly 200 operatively connected to the at least one switch layer 10, wherein the actuation control assembly 200 is configured to control the at least one switch layer 10 to switch between a closed state and an open state.

More specifically, the switching layer 10 comprises a carrying case 11, an electrical contact unit and a magnetic assembly 14. The electrical contact unit comprises a pair of stationary contact conductive elements 12 and a movable contact conductive assembly 13 mounted to the carrier housing 11, as shown in fig. 2 and 3. The movable contact conductive assembly 13 includes a movable contact conductive element 131 movable relative to the pair of stationary contact conductive elements 12, the movable contact conductive element 131 being adapted to be moved to selectively engage or disengage the pair of stationary contact conductive elements 12, as shown in fig. 5 and 6. In the embodiment of the present application, the actuation control assembly 200 may control the closed state and the open state of the switch layer 10 by controlling the movement of the movable contact conductive element 131 relative to the pair of static contact conductive elements 12. The movable contact conductive element 131 is in contact with the stationary contact conductive element 12 when the switching layer 10 is in the closed state, and the movable contact conductive element 131 is separated from the stationary contact conductive element 12 when the switching layer 10 is in the open state.

The specific embodiment of the actuation control unit 200 for controlling the switching layer 10 to perform the state switching is not limited in this application. In a specific example of the present application, the movable contact conductive assembly 13 includes a rotating member 132 drivingly connected to the actuation control assembly 200, the rotating member 132 may rotate along with the movement of the actuation control assembly 200, the movable contact conductive element 131 is disposed on the rotating member 132, and the movable contact conductive element 131 is also rotated when the rotating member 132 is rotated, so as to move relative to the static contact conductive element 12, in such a manner that the movable contact conductive element 131 is selectively engaged with or disengaged from the pair of static contact conductive elements 12, so as to implement the state switching of the switching layer 10.

An arc may be generated during the state switching of the switching layer 10, and accordingly, in the embodiment of the present application, a magnetic assembly 14 is configured for the electrical contact unit, and the magnetic assembly 14 includes a magnetic field generating element to perform arc extinction by using a scheme of magnet arc extinction, and attempts to improve space utilization and arc extinction performance of the electrical isolation switch by using a principle that a curve is longer than a straight line path. More specifically, the application adjusts the magnetic field formed by the magnetic field generating element by adjusting the arrangement mode of the magnetic field generating element, so that the magnetic field formed by the magnetic field generating element can bend the electric arc in different modes to prolong the movement path of the electric arc and accelerate the breaking and the extinction of the electric arc.

Accordingly, in the embodiment of the present application, a magnetic element (for example, a permanent magnet, a soft magnet) is used as a magnetic field generating element, at least two magnetic elements are disposed on a motion path of the movable contact conductive element 131, the at least two magnetic elements include a first magnetic element 141 generating a first magnetic field and a second magnetic element 142 generating a second magnetic field, and a difference exists between the first magnetic field and the second magnetic field, so that the first magnetic field and the second magnetic field deflect an arc in different modes, and the arc is bent for multiple times along with the change of the deflected mode.

In some embodiments of the present application, the magnetic field strength of the first magnetic field is different from the magnetic field strength of the second magnetic field such that there is a difference between the first magnetic field and the second magnetic field. Thus, when passing through the first magnetic field generated by the first magnetic element 141, the arc moves along a first expected track under the action of the lorentz force of the first magnetic field, when passing through the second magnetic field generated by the second magnetic element 142, the arc deviates from the first expected track under the action of the lorentz force of the second magnetic field, bends, moves along a second expected track, the movement path of the arc is prolonged, and the arc is elongated and broken.

Specifically, the magnetic field strength of the first magnetic field generated by the first magnetic element 141 and the magnetic field strength of the second magnetic field generated by the second magnetic element 142 may be controlled by controlling the material, type, size, and shape of the first magnetic element 141 and the second magnetic element 142 such that the magnetic field strength of the first magnetic field and the magnetic field strength of the second magnetic field are different. The difference between the magnetic field strength of the first magnetic field and the magnetic field strength of the second magnetic field may also be achieved by other means, which is not limited by the present application.

In other embodiments of the present application, the magnetic field direction of the first magnetic field is different from the magnetic field direction of the second magnetic field such that there is a difference between the first magnetic field and the second magnetic field. Specifically, the magnetic field direction of the first magnetic field generated by the first magnetic element 141 and the magnetic field direction of the second magnetic field generated by the second magnetic element 142 may be controlled by controlling the magnetic pole orientation of the first magnetic element 141 and the magnetic pole orientation of the second magnetic element 142 such that the magnetic field direction of the first magnetic field and the magnetic field direction of the second magnetic field are different.

More specifically, the first magnetic element 141 has a first magnetic pole facing the movable contact conductive assembly 13 and a second magnetic pole opposite to the first magnetic pole, and the second magnetic element 142 has a third magnetic pole facing the movable contact conductive assembly 13 and a fourth magnetic pole opposite to the third magnetic pole. In some embodiments of the present application, the first pole of the first magnetic element 141 is opposite to the third pole of the second magnetic element 142. For example, the first magnetic pole of the first magnetic element 141 is N-pole and the third magnetic pole of the second magnetic element 142 is S-pole, or the first magnetic pole of the first magnetic element 141 is S-pole and the third magnetic pole of the second magnetic element 142 is N-pole, and the angle α1 between the magnetic pole direction of the first magnetic element 141 and the magnetic pole direction of the second magnetic element 142 is greater than 90 ° and less than 180 °, as shown in fig. 7. For another example, the first magnetic pole of the first magnetic element 141 is N-pole and the third magnetic pole of the second magnetic element 142 is S-pole, or the first magnetic pole of the first magnetic element 141 is S-pole and the third magnetic pole of the second magnetic element 142 is N-pole, and the angle α1 between the magnetic pole direction of the first magnetic element 141 and the magnetic pole direction of the second magnetic element 142 is equal to 180 °.

In a specific example of the present application, the angle α1 between the magnetic pole direction of the first magnetic element 141 and the magnetic pole direction of the second magnetic element 142 is equal to 180 °, which is specifically expressed as: the first magnetic element 141 has a first central axis L1, the second magnetic element 142 has a second central axis L2, and the first central axis L1 of the first magnetic element 141 and the second central axis L2 of the second magnetic element 142 are parallel to each other, as shown in fig. 9. In this specific example, the first central axis L1 of the first magnetic element 141 and the second central axis L2 of the second magnetic element 142 are perpendicular to the movement plane of the movable contact conductive element 131. In other specific examples, the first central axis L1 of the first magnetic element 141 and the second central axis L2 of the second magnetic element 142 may not be perpendicular to the movement plane of the movable contact conductive element 131.

In this specific example, the first central axis L1 of the first magnetic element 141 extends in a direction that coincides with the magnetic pole direction of the first magnetic element 141, and the second central axis L2 extends in a direction that coincides with the magnetic pole direction of the second magnetic element 142. It should be understood that the extending direction of the first central axis L1 may not coincide with the magnetic pole direction of the first magnetic field, and the extending direction of the second central axis L2 may also not coincide with the magnetic pole direction of the second magnetic field. Accordingly, the arrangement of the first magnetic element 141 and the second magnetic element 142 may take other forms, that is, the first magnetic element 141 and the second magnetic element 142 may control the angle between the magnetic pole direction of the first magnetic element 141 and the magnetic pole direction of the second magnetic element 142 through other arrangements, so as to control the angle between the magnetic field direction of the first magnetic field and the magnetic field direction of the second magnetic field, so that the first magnetic field direction and the second magnetic field direction are different.

In some embodiments of the present application, the first magnetic pole of the first magnetic element 141 and the third magnetic pole of the second magnetic element 142 have the same polarity, and an included angle between the magnetic pole direction of the first magnetic element 141 and the magnetic pole direction of the second magnetic element 142 is greater than 0 ° and less than or equal to 90 °, as shown in fig. 8. For example, the first magnetic pole of the first magnetic element 141 is N-pole and the third magnetic pole of the second magnetic element 142 is N-pole, and an angle between a magnetic pole direction of the first magnetic element 141 and a magnetic pole direction of the second magnetic element 142 is greater than 0 ° and less than or equal to 90 °, or the first magnetic pole of the first magnetic element 141 is S-pole and the third magnetic pole of the second magnetic element 142 is S-pole, and an angle between a magnetic pole direction of the first magnetic element 141 and a magnetic pole direction of the second magnetic element 142 is greater than 0 ° and less than or equal to 90 °.

In this embodiment of the present application, the direction in which the strongest N magnetic pole point of the magnetic element points to the strongest S magnetic pole point is the magnetic pole direction of the magnetic element, where the strongest N magnetic pole point is the strongest magnetic point in the N poles of the magnetic element, and the strongest S magnetic pole point is the strongest magnetic point in the S poles of the magnetic element. Accordingly, the magnetic pole direction of the first magnetic element 141 is the direction in which the strongest N magnetic pole point of the first magnetic element 141 points to the strongest S magnetic pole point, and the magnetic pole direction of the second magnetic element 142 is the direction in which the strongest N magnetic pole point of the second magnetic element 142 points to the strongest S magnetic pole point.

In this embodiment, the magnetic assembly 14 further includes a third magnetic element 143 adjacent to the second magnetic element 142, and a difference exists between a third magnetic field generated by the third magnetic element 143 and a second magnetic field generated by the second magnetic element 142, such that the third magnetic field and the second magnetic field deflect the arc in different modes.

In some embodiments of the present application, the second magnetic field has a magnetic field strength that is different from the magnetic field strength of the third magnetic field such that there is a difference between the second magnetic field and the third magnetic field. Thus, when the arc passes through the second magnetic field generated by the second magnetic element 142, the arc moves along the second expected track under the action of the lorentz force of the second magnetic field, when the arc passes through the third magnetic field generated by the third magnetic element 143, the arc deviates from the second expected track and bends under the action of the lorentz force of the third magnetic field, and moves along the third expected track, as shown in fig. 10A and 10B, the movement path of the arc is prolonged, and the arc is lengthened and broken.

The magnetic field strength of the second magnetic field generated by the second magnetic element 142 and the magnetic field strength of the third magnetic field generated by the third magnetic element 143 may be controlled by controlling the material, type, size, shape, etc. of the second magnetic element 142 and the third magnetic element 143 such that the magnetic field strength of the second magnetic field and the magnetic field strength of the third magnetic field are different.

In other embodiments of the present application, the magnetic field direction of the second magnetic field is different from the magnetic field direction of the third magnetic field, such that there is a difference between the second magnetic field and the third magnetic field. Specifically, the magnetic field direction of the second magnetic field generated by the second magnetic element 142 and the magnetic field direction of the third magnetic element 143 may be controlled by controlling the magnetic pole orientation of the second magnetic element 142 and the magnetic pole orientation of the third magnetic element 143 such that the magnetic field direction of the second magnetic field is different from the magnetic field direction of the third magnetic field.

More specifically, as previously described, the second magnetic element 142 has a third magnetic pole facing the movable contact conductive assembly 13 and a fourth magnetic pole opposite the third magnetic pole. The third magnetic element 143 has a fifth magnetic pole facing the movable contact conductive assembly 13 and a sixth magnetic pole opposite the fifth magnetic pole. In some embodiments of the present application, the third pole of the second magnetic element 142 is opposite in polarity to the fifth pole of the third magnetic element 143. For example, the third magnetic pole of the second magnetic element 142 is S-pole and the fifth magnetic pole of the third magnetic element 143 is N-pole, or the third magnetic pole of the second magnetic element 142 is N-pole and the fifth magnetic pole of the third magnetic element 143 is S-pole, and the angle α2 between the magnetic pole direction of the second magnetic element 142 and the magnetic pole direction of the third magnetic element 143 is greater than 90 ° and less than 180 °, as shown in fig. 7. For another example, the third magnetic pole of the second magnetic element 142 is S-pole and the fifth magnetic pole of the third magnetic element 143 is N-pole, or the third magnetic pole of the second magnetic element 142 is N-pole and the fifth magnetic pole of the third magnetic element 143 is S-pole, and the angle α2 between the magnetic pole direction of the second magnetic element 142 and the magnetic pole direction of the third magnetic element 143 is 180 °.

In a specific example of the present application, the angle α2 between the magnetic pole direction of the second magnetic element 142 and the magnetic pole direction of the third magnetic element 143 is equal to 180 °, which is specifically expressed as: the third magnetic element 143 has a third central axis L3, and the second central axis L2 of the second magnetic element 142 and the third central axis L3 of the third magnetic element 143 are parallel to each other, as shown in fig. 9. In this specific example, the third central axis L3 of the third magnetic element 143 is perpendicular to the movement plane of the movable contact conductive element 131.

In this specific example, the extending direction of the third central axis L3 of the third magnetic element 143 coincides with the magnetic pole direction of the third magnetic element 143. It should be appreciated that the extension direction of the third central axis L3 may not coincide with the magnetic field direction of the third magnetic pole. Accordingly, the second magnetic element 142 and the third magnetic element 143 may be disposed in other manners such that the second magnetic field direction and the third magnetic field direction are different.

In a specific example of the present application, the magnetic pole orientation of the first magnetic element 141 is opposite to the magnetic pole orientation of the second magnetic element 142, the magnetic pole orientation of the second magnetic element 142 is opposite to the magnetic pole orientation of the third magnetic element 143, and the magnetic pole orientation of the first magnetic element 141 is the same as the magnetic pole orientation of the third magnetic element 143.

In some embodiments of the present application, the third magnetic pole of the second magnetic element 142 has the same polarity as the fifth magnetic pole of the third magnetic element 143, and the angle between the magnetic pole direction of the second magnetic element 142 and the magnetic pole direction of the third magnetic element 143 is greater than 0 ° and less than or equal to 90 °, as shown in fig. 8. For example, the third magnetic pole of the second magnetic element 142 is N-pole and the fifth magnetic pole of the third magnetic element 143 is N-pole, and an angle between the magnetic pole direction of the second magnetic element 142 and the magnetic pole direction of the third magnetic element 143 is greater than 0 ° and less than or equal to 90 °, or the third magnetic pole of the second magnetic element 142 is S-pole and the fifth magnetic pole of the third magnetic element 143 is S-pole, and an angle between the magnetic pole direction of the second magnetic element 142 and the magnetic pole direction of the third magnetic element 143 is greater than 0 ° and less than or equal to 90 °. In this embodiment, the magnetic pole direction of the third magnetic element 143 is the direction in which the strongest N magnetic pole point of the third magnetic element 143 points to the strongest S magnetic pole point.

It should be appreciated that in some embodiments of the present application, the third magnetic field generated by the third magnetic element 143 may also coincide with the second magnetic field generated by the second magnetic element 142.

In the embodiment of the present application, the first magnetic element 141, the second magnetic element 142, and the third magnetic element 143 are mounted on the carrier housing 11, and the specific mounting manner and mounting position are not limited in this application. In a specific example of the present application, the first magnetic pole of the first magnetic element 141 is exposed to the carrier housing 11, the third magnetic pole of the second magnetic element 142 and the fifth magnetic pole of the third magnetic element 143 are wrapped around the carrier housing 11, the second magnetic element 142 is insulated from the pair of static contact conductive elements 12 and the movable contact conductive assembly 13, and the third magnetic element 143 is insulated from the pair of static contact conductive elements 12 and the movable contact conductive assembly 13. The parts of the bearing housing 11 covered by the second magnetic element 142 and the third magnetic element 143 are made of insulating materials.

In this specific example, the bearing housing 11 has a fitting groove 111, and the first magnetic element 141 is fittingly mounted in the fitting groove 111. The first pole of the first magnetic element 141 is exposed to the carrier housing 11, the magnetic properties of which are unaffected by the housing barrier. The first magnetic element 141 may protrude from the assembly groove 111, and a height dimension of the first magnetic element 141 is equal to or greater than a depth dimension of the assembly groove 111, so that the first magnetic element 141 is more exposed to the bearing housing 11. The carrier housing 11 further has mounting grooves 112 concavely formed on the surface thereof, and the second magnetic element 142 and the third magnetic element 143 are respectively closely fitted into the adjacent two of the mounting grooves 112.

In some embodiments of the present application, the switch layer 10 further includes a packaging housing 16 that is fastened to the carrier housing 11. The package housing 16 has a first groove 161 corresponding to the mounting groove 112, and the second magnetic element 142 and the third magnetic element 143 may be wrapped between the mounting housing of the carrier housing 11 and the first groove 161 of the package housing 16.

It will be appreciated that a magnetic element may be arranged at the location where the arc was initially generated so that the magnetic element may be used to direct the arc deflection as soon as the arc is generated. The movable contact conductive element 131 generates an arc when being engaged with or disengaged from the static contact conductive element 12, and accordingly, a position adjacent to where the static contact conductive element 12 and the movable contact conductive element 131 are in contact is a position where an arc is initially generated. Thus, at least one magnetic element may be arranged adjacent to the position where the static contact conductive element 12 and the dynamic contact conductive element 131 are in contact.

In the embodiment of the present application, each static contact conductive element 12 of the pair of static contact conductive elements 12 has a static contact conductive end 121, and the moving contact conductive element 131 has a pair of moving contact conductive ends 1311. During movement of the movable contact conductive element 131 relative to the stationary contact conductive element 12, a pair of movable contact conductive ends 1311 of the movable contact conductive element 131 respectively engage or disengage a pair of stationary contact conductive ends 121 of the pair of stationary contact conductive elements 12. That is, during the movement of the movable contact conductive element 131 relative to the static contact conductive element 12, the movable contact conductive element 131 contacts the static contact conductive element 12 at the location of the static contact conductive end 121 of the static contact conductive element 12.

Accordingly, a magnetic element may be arranged adjacent to the stationary contact conductive end 121. In one specific example of the present application, the first magnetic element 141 is located below the static conductive end 121 of one of the pair of static conductive elements 12, as shown in fig. 3 and 6. In this way, the arc is deflected by the first magnetic element 141 just as it is generated at the static contact terminal 121.

In particular, in the present embodiment, the first magnetic element 141 is disposed eccentrically to the static contact conductive terminal 121, i.e., the center of the first magnetic element 141 is offset from the center of the static contact conductive terminal 121. In this way, the arc generated at the stationary contact conductive end 121 is not only deflected downward but also deflected sideways by the magnetic field generated by the first magnetic element 141. In a specific example of the present application, the first central axis L1 of the first magnetic element 141 corresponds to an edge region of the static contact conductive terminal 121, as shown in fig. 6. More preferably, the first central axis L1 of the first magnetic element 141 corresponds to an intersection of the outer edge of the static contact conductive end 121 and the motion trace of the moving contact conductive element 131, where the intersection of the outer edge of the static contact conductive end 121 and the motion trace of the moving contact conductive element 131 is: the location where the outer edge of the static contact conductive terminal 121 intersects the outer edge of the dynamic contact conductive terminal 1311 when the static contact conductive member 12 just engages with or disengages from the dynamic contact conductive member 131.

After the arc is generated at the static contact conductive end 121, during the moving process of the movable contact conductive element 131 relative to the static contact conductive element 12, the arc between the static contact conductive element 12 and the movable contact conductive element 131 moves along the movement track of the movable contact conductive element 131 without interference of external factors such as magnetic fields.

Correspondingly, a further magnetic element can be arranged at a position spaced apart from the first magnetic element in the direction of extension of the movement path of the movable contact conductive element, so that the arc is continuously subjected to the action of the magnetic field during the movement and is guided to move according to the desired trajectory. In a specific example of the present application, the second magnetic element is spaced from the first magnetic element in an extending direction of a movement path of the movable contact conductive element.

Further, a magnetic element may be disposed at a position corresponding to the movement path of the movable contact conductive element 131, where the position may correspond to the movement path of the movable contact conductive element 131 in the axial direction set by the switching layer 10, or may correspond to the movement path of the movable contact conductive element 131 in the radial direction set by the switching layer 10. And in order to ensure that the magnetic field generated by the magnetic element can act on the arc between the static contact conductive element 12 and the moving contact conductive element 131, the magnetic element may be disposed opposite to the moving path of the moving contact conductive element 131.

In a specific example of the present application, the second magnetic element 142 and the third magnetic element 143 are located in a middle region of the motion path of the movable contact conductive element 131, so that the second magnetic field generated by the second magnetic element 142 and the third magnetic field generated by the third magnetic element 143 can both cover the motion range of the arc in a specific direction. Specifically, the second magnetic element 142 is located in a middle region of the movement path of the movable contact conductive element 131 in the radial direction set by the switching layer 10, and the third magnetic element 143 is located in a middle region of the movement path of the movable contact conductive element 131 in the radial direction set by the switching layer 10.

The shape of each of the magnetic elements is not limited to the present application, and for example, in a specific example of the present application, the first magnetic element 141 has a circular cross section, and the second magnetic element 142 and the third magnetic element 143 each have a sector-shaped cross section. In other examples of the present application, the first magnetic element 141 or the second magnetic element 142 or the third magnetic element 143 has a cross section of other shape, for example, a trapezoid, an arch, a rectangle, a triangle, etc.

In order to make the magnetic fields generated by the second magnetic element 142 and the third magnetic element 143 cover the movement path of the movable contact conductive element 131 as much as possible, thereby acting on the arc, it is preferable that the shapes of the second magnetic element 142 and the third magnetic element 143 coincide with the movement path of the movable contact conductive element 131. In this embodiment, the movable contact conductive element 131 moves along an arc path, and accordingly, in some embodiments of the present application, the second magnetic element 142 and the third magnetic element 143 each have an arc structure extending along the movement path of the movable contact conductive element 131.

It should be noted that, in the embodiment of the present application, not only the arc is elongated by the magnet to achieve arc extinction, but also the arc extinguishing groove 15 is configured for the deflected arc on the basis of the arc extinction by the magnet, the arc extinguishing groove 15 is disposed on the deflection path of the arc, and the arc entering the arc extinguishing groove 15 can be forced to be thinned and lengthened based on the "narrow slit principle" so as to accelerate the breaking and extinguishing of the arc, in this way, the arc extinguishing capability of the electrical isolating switch is enhanced.

In an embodiment of the present application, the arc deflects under the magnetic field of the magnetic element, bypassing around the magnetic element. Accordingly, an arc chute 15 may be arranged around the magnetic assembly 14 and/or the movable contact conductive element 131.

Accordingly, in the present embodiment, the carrying case 11 has at least one arc extinguishing groove 15 concavely formed therein, and the at least one arc extinguishing groove 15 is located around the magnetic assembly 14. The at least one arc chute 15 includes a first arc chute 151 located outside the magnetic assembly 14 and a second arc chute 152 located inside the magnetic assembly 14. Preferably, the first arc extinguishing groove 151 and/or the second arc extinguishing groove 152 extend along a movement path of the movable contact conductive member 131. In a specific example of the present application, the arc of the first arc extinguishing groove 151 and the arc of the second arc extinguishing groove 152 are identical.

In particular, in the embodiment of the present application, the magnetic fields generated by the first magnetic element 141 and the second magnetic element 142 have different magnetic field directions, so that the electric arc is deflected in different modes, and in the process of approaching the electric arc from the area near the first magnetic element 141 to the second magnetic element 142, the deflected mode of the electric arc is switched, and the movement track of the electric arc is changed accordingly. For example, an arc that would otherwise move outside the first magnetic element 141 is affected by a magnetic field having an opposite direction to the magnetic field when passing between the first magnetic element 141 and the second magnetic element 142, and passes through a space between the first magnetic element 141 and the second magnetic element 142, and winds to the inside of the second magnetic element 142; alternatively, the arc, which is originally moving inside the first magnetic element 141, is influenced by the magnetic field having the opposite direction to the magnetic field when passing between the first magnetic element 141 and the second magnetic element 142, and passes through the space between the first magnetic element 141 and the second magnetic element 142 to be wound outside the second magnetic element 142, as shown in fig. 10B.

Accordingly, in the present embodiment, an arc chute may be provided between the magnetic elements, and the at least one arc chute 15 further includes a third arc chute 153 located between two adjacent magnetic elements, for example, located between the first magnetic element 141 and the second magnetic element 142 and/or located between the second magnetic element 141 and the third magnetic element 143. Preferably, the third arc extinguishing groove 153 is communicated between the first arc extinguishing groove 151 and the second arc extinguishing groove 152, so that the arc is continuously elongated through the third arc extinguishing groove 153 between two adjacent magnetic elements in the process of winding from the first arc extinguishing groove 151 to the second arc extinguishing groove 152 or winding from the second pair of arc extinguishing grooves 152 to the first arc extinguishing groove 151.

It should be noted that in some embodiments of the present application, the electrical isolation switch is further provided with other structures for avoiding arc interference. For example, the carrying case 11 has a spouting port 113 communicating with the arc extinguishing groove 15, the spouting port 113 extending from the arc extinguishing groove 15 to an outer surface of the carrying case 11 so that an arc can be guided outside the carrying case 11 through the spouting port 113. For another example, the switch layer 10 is provided with a barrier member 133 that is blocked between the pair of movable contact conductive ends 1311 of the movable contact conductive element 131, so as to ensure that an arc between one movable contact conductive end 1311 of the pair of movable contact conductive ends 1311 and one static contact conductive end 121 of the pair of static contact conductive ends 121 and an arc between the other movable contact conductive end 1311 of the pair of movable contact conductive ends 1311 and the other static contact conductive end 121 of the pair of static contact conductive ends 121 and a breaking process thereof are not affected by each other, and are independent of each other. Specifically, the outer peripheral surface of the rotating member 132 is partially recessed inward to form a rotating groove 1301, the rotating groove 1301 has an upper groove wall 1321 and a lower groove wall 1322 opposite to each other in the axial direction set by the switching layer 10, the barrier member 133 extends between the upper groove wall 1321 and the lower groove wall 1322 of the rotating groove 1301 in the axial direction set by the switching layer 10, and is disposed between the two movable contact terminals 1311 in the circumferential direction set by the switching layer 10.

Accordingly, according to the arc extinguishing principle of the electrical isolation switch, the application proposes an arc extinguishing method, as shown in fig. 11, wherein the arc extinguishing method comprises the following steps: s110, disposing at least two magnetic elements on a motion path of a movable contact conductive element, wherein magnetic poles of at least two magnetic elements in the at least two magnetic elements are oriented differently so as to deflect at least two modes of electric arcs generated in the process of connecting or disconnecting the movable contact conductive element and the static contact conductive element; and S120, arranging at least one arc extinguishing groove on the deflection path of the arc so that the arc is bent and guided to the arc extinguishing groove.

In summary, an electrical isolation switch and an arc extinguishing method based on the embodiments of the present application are illustrated, the electrical isolation switch uses a magnet arc extinguishing scheme to extinguish the arc, and adjusts a magnetic field formed by a magnetic element by adjusting a deployment mode of the magnetic element, so that the magnetic field formed by the magnetic element can bend an arc in different modes to elongate the arc, and accelerate breaking and extinguishing of the arc.

The present application and its embodiments have been described above with no limitation, and the actual structure is not limited to this, but is only one of the embodiments of the present application shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution are not creatively devised without departing from the gist of the present application, and all the structural manners and the embodiments are considered to be within the protection scope of the present application.

Claims (19)

1. A switching layer, comprising: a bearing housing; a pair of stationary conductive elements mounted to the carrier housing and a movable contact conductive assembly, wherein the movable contact conductive assembly includes a movable contact conductive element movable relative to the pair of stationary conductive elements, the movable contact conductive element being adapted to be moved to selectively engage or disengage the pair of stationary conductive elements; a magnetic assembly for at least two modes of deflection of an arc generated during engagement or disengagement of the movable contact conductive element and the stationary contact conductive element; and at least one arc chute located in a deflection path of the arc; the magnetic assembly comprises a first magnetic element and a second magnetic element which are positioned on the motion path of the movable contact conductive element, and the magnetic pole orientation of the first magnetic element is different from the magnetic pole orientation of the second magnetic element.

2. The switching layer of claim 1, wherein the first and second magnetic elements each correspond to a path of movement of the movable contact conductive element in an axial direction set by the switching layer.

3. The switching layer of claim 2, wherein the first magnetic element has a first pole facing the movable contact conductive assembly and a second pole opposite the first pole, and the second magnetic unit has a third pole facing the movable contact conductive assembly and a fourth pole opposite the third pole.

4. A switching layer according to claim 3, wherein the first pole of the first magnetic element is of opposite polarity to the third pole of the second magnetic element.

5. A switching layer according to claim 3, wherein each of the pair of static conductive elements has a static conductive end, the first magnetic element being located below the static conductive end of one of the pair of static conductive elements.

6. The switching layer of claim 5, wherein the first magnetic element is disposed off-center from the static contact conductive end.

7. The switching layer of claim 6, wherein the first magnetic element has a first central axis that corresponds to an edge region of the static contact conductive end.

8. A switching layer according to claim 3, wherein a first pole of the first magnetic element is exposed to the carrier housing and a third pole of the second magnetic element is encased within the carrier housing.

9. The switching layer of claim 8, wherein the carrier housing has a fitting recess within which the first magnetic element is fittingly mounted, a height dimension of the first magnetic element being greater than or equal to a depth dimension of the fitting recess.

10. The switching layer of claim 8, wherein the second magnetic element remains insulated relative to the pair of stationary conductive elements and the movable contact conductive assembly.

11. The switching layer of claim 10, wherein the bearing housing has a mounting groove concavely formed at a bottom surface thereof, the second magnetic element being tightly fitted into the mounting groove.

12. The switching layer of claim 5, wherein the first magnetic element has a circular cross-section and the second magnetic element has a scalloped cross-section.

13. The switching layer of claim 1, wherein the magnetic assembly further comprises a third magnetic element adjacent to the second magnetic element, the third magnetic element having a pole orientation different from a pole orientation of the second magnetic element.

14. The switching layer of claim 13, wherein a pole orientation of the first magnetic element is opposite a pole orientation of the second magnetic element, the second magnetic element is opposite a pole orientation of the third magnetic element, and the pole orientation of the first magnetic element is the same as the pole orientation of the third magnetic element.

15. The switching layer of claim 1, wherein the arc chute comprises a first arc chute located outside of the magnetic assembly and a second arc chute located inside of the magnetic assembly.

16. The switching layer of claim 15, wherein the arc chute comprises a third arc chute located between the first and second magnetic elements of the magnetic assembly.

17. The switching layer of claim 16, wherein the third arc chute is in communication between the first arc chute and the second arc chute.

18. An electrical disconnector, comprising: at least one switching layer according to any of claims 1 to 17; and an actuation control assembly operably connected to the at least one switching layer, wherein the actuation control assembly is configured to control the switching of the at least one switching layer between the closed state and the open state.

19. An arc extinguishing method, characterized by comprising: disposing at least two magnetic elements on a motion path of the movable contact conductive element, wherein magnetic poles of at least two magnetic elements in the at least two magnetic elements are oriented differently so as to deflect at least two modes of electric arcs generated in the process of jointing or disconnecting the movable contact conductive element and the static contact conductive element; and providing at least one arc chute on a deflection path of the arc such that the arc is bent and directed to the arc chute.