CN218602329U - Electrical isolating switch and switch layer thereof - Google Patents

Abstract

The application discloses electrical isolation switch and switch layer thereof, wherein, electrical isolation switch utilizes the magnet arc extinguishing scheme to the magnetic field that the magnet formed is adjusted to the deployment mode through adjusting the magnet, makes the magnetic field that the magnet formed forms many bends arc extinguishing field territory, many bends arc extinguishing field territory can carry out the bending of different modes to electric arc in order to lengthen electric arc accelerates the snapping and the extinction of electric arc, through such a mode, reinforcing electrical isolation switch's arc extinguishing ability.

Description

Electrical isolating switch and switch layer thereof

Technical Field

The application relates to the field of switches, in particular to an electrical isolation switch and a switch layer thereof.

Background

In recent years, dc transmission systems have become more and more popular and are developed for high voltage and high current. The improvement of the voltage of the direct current transmission system brings cost reduction, line active loss reduction, generation efficiency improvement and other advantages to direct current transmission, and meanwhile, some hidden dangers are increased to a certain extent, wherein direct current arc faults are typical potential safety hazards in direct current transmission.

For example, in a photovoltaic system, a dc switch for controlling between a photovoltaic panel and an inverter is provided with a stationary contact part and a movable contact part movable relative to the stationary contact part, and when a voltage and/or a current in a dc circuit is greater than a preset range, an arc is formed between the movable contact part and the stationary contact part at the moment when the dc switch is separated during the breaking of the conducted dc circuit. The greater the voltage or current in the dc circuit, the more arcs are generated during the breaking of the dc circuit by the dc switch, which if sustained burns can damage surrounding equipment and even cause an explosion.

There are many arc-extinguishing schemes, such as increasing the diameter of the moving contact part to increase the distance to lengthen the arc, increasing the breaking speed, and adding magnets to extinguish the arc. However, these arc extinguishing solutions have some drawbacks, for example, increasing the diameter of the moving contact part leads to an increase in the overall size of the dc switch, which is contrary to the current trend of miniaturization of the switches, and there is a significant speed limit for increasing the breaking speed, and the increase in the breaking speed leads to a decrease in the control stability and the lifetime of the dc switch, while the arc extinguishing effect of the additional magnet is not significant and often fails to meet the application requirements.

Therefore, a new arc extinguishing scheme is desired.

Disclosure of Invention

An advantage of the present application is to provide an electrical isolation switch and a switch layer thereof, wherein the electrical isolation switch utilizes a magnet arc extinguishing scheme to extinguish arc, and adjusts a magnetic field formed by a magnetic element by adjusting a disposition manner of the magnetic element, so that the magnetic field formed by the magnetic element can variously bend an arc to extend a moving path of the arc, accelerate the breaking and extinguishing of the arc, and in such a manner, enhance an arc extinguishing capability of the electrical isolation switch.

Another advantage of the present application is to provide an electrical isolation switch and a switching layer thereof, wherein the arc can be elongated by adjusting the disposition of the magnets, so that the electrical isolation switch can enhance the arc extinguishing capability without greatly increasing the overall size of the electrical isolation switch or increasing the overall size of the electrical isolation switch.

According to an aspect of the present application, there is provided a switching layer comprising: a load bearing housing; a pair of stationary contact conductive members and a movable contact conductive assembly mounted to the carrier housing, wherein the movable contact conductive assembly includes a movable contact conductive member movable relative to the pair of stationary contact conductive members, the movable contact conductive member adapted to be moved to selectively engage or disengage the pair of stationary contact conductive members; the magnetic assembly comprises a first magnetic element and a second magnetic element which are arranged on the bearing shell and positioned on the motion path of the movable contact conducting element; wherein there is a difference between a first magnetic field generated by the first magnetic element and a second magnetic field generated by the second magnetic element.

In the switching layer according to the present application, a magnetic field direction of the first magnetic field is different from a magnetic field direction of the second magnetic field.

In the switching layer according to the present application, the magnetic field strength of the first magnetic field is different from the magnetic field strength of the second magnetic field.

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

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

In the switching layer according to the present application, the first magnetic pole of the first magnetic element is an N-pole and the third magnetic pole of the second magnetic element is an S-pole, or the first magnetic pole of the first magnetic element is an S-pole and the third magnetic pole of the second magnetic element is an N-pole.

In the switching layer according to the present application, the magnetic pole direction of the first magnetic element is a direction in which the strongest N-pole point of the first magnetic element points to the strongest S-pole point, the magnetic pole direction of the second magnetic element is a direction in which the strongest N-pole point of the second magnetic element points to the strongest S-pole point, and an included angle between the magnetic pole direction of the first magnetic element and the magnetic pole direction of the second magnetic element is greater than 90 ° and less than 180 °.

In the switching layer according to the present application, the magnetic pole direction of the first magnetic element is a direction in which the strongest N-pole point of the first magnetic element points to the strongest S-pole point, the magnetic pole direction of the second magnetic element is a direction in which the strongest N-pole point of the second magnetic element points to the strongest S-pole point, and an included angle between the magnetic pole direction of the first magnetic element and the magnetic pole direction of the second magnetic element is 180 °.

In the switch layer according to the present application, the first central axis of the first magnetic element and the second central axis of the second magnetic element are parallel to each other, and the first central axis of the first magnetic element and the second central axis of the second magnetic element are perpendicular to the moving plane of the movable contact conductive element.

In the switching layer according to the present application, the first magnetic pole of the first magnetic element and the third magnetic pole of the second magnetic element have the same magnetic pole, and an included angle between the magnetic pole direction of the first magnetic element and the magnetic pole direction of the second magnetic element is greater than 0 ° and less than or equal to 90 °, wherein the magnetic pole direction of the first magnetic element is a direction in which a strongest N-magnetic pole point of the first magnetic element points to a strongest S-magnetic pole point, and the magnetic pole direction of the second magnetic element is a direction in which the strongest N-magnetic pole point of the second magnetic element points to the strongest S-magnetic pole point.

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

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

In the switch layer according to the present application, the carrier case has a mounting groove concavely formed in a bottom surface thereof, and the second magnetic element is tightly fitted in the mounting groove.

In a switching layer according to the application, the carrier housing has a fitting recess in which the first magnetic element is fittingly mounted.

In the switching layer according to the present application, the first magnetic pole of the first magnetic element protrudes from the fitting groove.

In the switching layer according to the present application, a height dimension of the first magnetic element is equal to or greater than a depth dimension of the fitting groove.

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

In a switching layer according to the present application, the second magnetic element is located in a middle region of a moving path of the movable contact conductive element.

In a 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 a switching layer according to the present application, the magnetic component further includes a third magnetic element adjacent to the second magnetic element, a third magnetic field direction of the third magnetic element being different from a second magnetic field direction 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 a switching layer according to the present application, the carrier housing has at least one arc-extinguishing groove concavely formed therein, the at least one arc-extinguishing groove being located around the magnetic assembly.

In a switching layer according to the present application, the at least one arc chute comprises a first arc chute located at an outer side of the magnetic assembly and a second arc chute located at an inner side of the magnetic assembly.

In a switching layer according to the application, the first and/or the second arc-extinguishing groove extends along a movement path of the movable contact conducting element.

In a switching layer according to the present application, the at least one arc chute further comprises a third arc chute located between the first magnetic element and the second magnetic element of the magnetic assembly.

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

Further objects and advantages of the present application will become apparent from a reading of the ensuing description and 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 claims.

Drawings

The above and other objects, features and advantages of the present application will become more apparent by describing in more detail embodiments of the present application with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings, like reference numbers generally represent like parts or steps.

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

Fig. 2 illustrates a schematic partial explosion of the electrical disconnector according to an embodiment of the 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 carrier housing of a switching layer of the electrical disconnect switch according to an embodiment of the present application.

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

Fig. 10A illustrates a lorentz magnetic trend of a magnetic element in one particular example of the electrical disconnect switch according to embodiments of the present application.

Fig. 10B illustrates a movement trace of an arc in one particular example of the electrical isolation switch 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 understood that the described embodiments are only some embodiments of the present application and not all embodiments of the present application, and that the present application is not limited by the example embodiments described herein.

Summary of the application

As described above, there are many arc-extinguishing schemes, such as increasing the diameter of the moving contact portion to increase the distance to lengthen the arc, increasing the breaking speed, and adding a magnet to extinguish the arc. However, these arc extinguishing solutions have some drawbacks, for example, increasing the diameter of the moving contact part leads to an increase in the overall size of the dc switch, which is contrary to the current trend of miniaturization of the switches, and there is a significant speed limit for increasing the breaking speed, and the increase in the breaking speed leads to a decrease in the control stability and the lifetime of the dc switch, while the arc extinguishing effect of the additional magnet is not significant and often fails to meet the application requirements.

Therefore, a new arc extinguishing solution is desired.

Specifically, through research on a scheme for extinguishing the arc of the magnet by the inventor of the application, the following findings are found: in the solution of deflecting the arc by the magnet to elongate the arc and then breaking the arc, usually, the arc is deflected by the magnet in a specific direction so that the arc is elongated along the specific direction, and in order to draw the arc long and thin enough to break it, the size of the housing of the dc switch in the specific direction is correspondingly increased, which does not meet the trend of miniaturization of the dc switch at present.

Based on this, the inventor of the present application proposes an electrical isolation switch, which attempts to improve the space utilization rate and arc extinguishing performance of the electrical isolation switch by using the principle that a curve in a space is longer than a straight path. In particular, a particular magnetic field may produce a force in a particular direction on the arc, causing the arc to deflect in a particular manner. The magnetic field generating element (such as a magnet or a coil) can be arranged in an area where the electric arc is generated, and the magnetic field formed by the magnetic field generating element is adjusted by adjusting the arrangement mode of the magnetic field generating element, so that the magnetic field formed by the magnetic field generating element deflects the electric arc in different modes for many times, the electric arc is guided to be bent for many times to elongate the electric arc, and the breaking and extinguishing of the electric arc are accelerated.

Accordingly, the present application provides a switching layer comprising a carrier housing, a magnetic assembly, a pair of stationary 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 stationary contact conductive elements, the movable contact conductive element being adapted to be moved to selectively engage or disengage the pair of stationary 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 element, wherein there is a difference between a first magnetic field generated by the first magnetic element and a second magnetic field generated by the second magnetic element.

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

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

Schematic electrical isolating switch

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

Specifically, in the embodiment of the present application, as shown in fig. 1, the electrical isolation switch includes at least one switch layer 10 and an actuation control element 200 operatively connected to the at least one switch layer 10, wherein the actuation control element 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 carrier housing 11, electrical contact means and a magnetic assembly 14. The electrical contact unit comprises a pair of stationary contact conductive members 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 member 131 movable relative to the pair of stationary contact conductive members 12, the movable contact conductive member 131 being adapted to be moved to selectively engage or disengage the pair of stationary contact conductive members 12, as shown in fig. 5 and 6. In the embodiment of the present application, the actuation control assembly 200 can control the closed state and the open state of the switch layer 10 by controlling the movable contact conductive element 131 to move relative to the pair of stationary contact conductive elements 12. When the switch layer 10 is in a closed state, the movable contact conductive element 131 is in contact with the fixed contact conductive element 12, and when the switch layer 10 is in an open state, the movable contact conductive element 131 is separated from the fixed contact conductive element 12.

The specific embodiment of the actuation control assembly 200 controlling the switch layer 10 to switch states is not limited in the present 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 is rotatable with the actuation control assembly 200, the movable contact conductive element 131 is disposed on the rotating member 132, and when the rotating member 132 is rotated, the movable contact conductive element 131 is also rotated and further moves relative to the stationary contact conductive element 12, in such a way that the movable contact conductive element 131 is selectively engaged with or disengaged from the pair of stationary contact conductive elements 12, thereby achieving the state switching of the switch layer 10.

An arc may be generated during the switching of the switching layer 10, and accordingly, in the embodiment of the present application, the magnetic assembly 14 is provided for the electrical contact unit, and the magnetic assembly 14 includes a magnetic field generating element to perform arc extinction using a scheme of magnetic arc extinction, and an attempt is made 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 path. More specifically, the magnetic field formed by the magnetic field generating element is adjusted 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 arc in different modes to prolong the moving path of the arc, and the breaking and the extinction of the arc are accelerated.

Accordingly, in the embodiment of the present application, a magnetic element (e.g., a permanent magnet or a soft magnet) is used as a magnetic field generating element, and at least two magnetic elements are arranged on the moving path of the movable contact conducting element 131, and 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 there is a difference between the first magnetic field and the second magnetic field, so that the first magnetic field and the second magnetic field deflect the arc in different modes, and the arc is bent multiple times with the change of the deflected mode.

In some embodiments of the present application, a magnetic field strength of the first magnetic field is different from a 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 the arc passes through the first magnetic field generated by the first magnetic element 141, the arc moves along the first expected trajectory under the action of the lorentz force of the first magnetic field, and when the arc passes through the second magnetic field generated by the second magnetic element 142, the arc deviates from the first expected trajectory and bends, and moves along the second expected trajectory, as shown in fig. 10A and 10B, the movement path of the arc is extended, and the arc is pulled apart by the extension.

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, 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 in other ways, which are not limited by the present application.

In other embodiments of the present application, a magnetic field direction of the first magnetic field is different from a magnetic field direction of the second magnetic field such that a difference exists 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 member 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 member 13 and a fourth magnetic pole opposite to the third magnetic pole. In some embodiments of the present application, the first magnetic pole of the first magnetic element 141 is opposite to the third magnetic pole of the second magnetic element 142. For example, the first magnetic pole of the first magnetic element 141 is an N-pole and the third magnetic pole of the second magnetic element 142 is an S-pole, or the first magnetic pole of the first magnetic element 141 is an S-pole and the third magnetic pole of the second magnetic element 142 is an N-pole, and an included angle α 1 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 an N pole and the third magnetic pole of the second magnetic element 142 is an S pole, or the first magnetic pole of the first magnetic element 141 is an S pole and the third magnetic pole of the second magnetic element 142 is an N pole, and an included angle α 1 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, an included angle α 1 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 expressed by: 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 moving 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 moving plane of the movable contact conducting element 131.

In this specific example, the extending direction of the first central axis L1 of the first magnetic element 141 coincides with the magnetic pole direction of the first magnetic element 141, and the extending direction of the second central axis L2 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 disposition of the first magnetic element 141 and the second magnetic element 142 may also be in 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 disposition, and further 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 magnetic pole, 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 an N-pole, the third magnetic pole of the second magnetic element 142 is an N-pole, 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 °, or the first magnetic pole of the first magnetic element 141 is an S-pole, the third magnetic pole of the second magnetic element 142 is an S-pole, 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 °.

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

In the present 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 magnetic field strength of the second magnetic field 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 trajectory under the action of the lorentz force of the second magnetic field, and when the arc passes through the third magnetic field generated by the third magnetic element 143, the arc deviates from the second expected trajectory and bends, and moves along the third expected trajectory under the action of the lorentz force of the third magnetic field, as shown in fig. 10A and 10B, the movement path of the arc is extended, and the arc is elongated 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, a magnetic field direction of the second magnetic field is different from a magnetic field direction of the third magnetic field such that a difference exists 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 mentioned above, the second magnetic element 142 has a third magnetic pole facing the movable contact conductive member 13 and a fourth magnetic pole opposite to the third magnetic pole. The third magnetic element 143 has a fifth magnetic pole facing the movable contact conductive member 13 and a sixth magnetic pole opposite to the fifth magnetic pole. In some embodiments of the present application, the third magnetic pole of the second magnetic element 142 is opposite to the fifth magnetic pole of the third magnetic element 143. For example, the third magnetic pole of the second magnetic element 142 is an S-pole and the fifth magnetic pole of the third magnetic element 143 is an N-pole, or the third magnetic pole of the second magnetic element 142 is an N-pole and the fifth magnetic pole of the third magnetic element 143 is an S-pole, and an angle α 2 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 an S-pole and the fifth magnetic pole of the third magnetic element 143 is an N-pole, or the third magnetic pole of the second magnetic element 142 is an N-pole and the fifth magnetic pole of the third magnetic element 143 is an S-pole, and an included angle α 2 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 °.

In a specific example of the present application, the angle α 2 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 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 moving 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 understood that the extending direction of the third central axis L3 may not coincide with the magnetic field direction of the third magnetic pole. Accordingly, the disposition of the second magnetic element 142 and the third magnetic element 143 may also be in other forms, 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 and the fifth magnetic pole of the third magnetic element 143 have the same polarity, and the included 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 an N-pole, the fifth magnetic pole of the third magnetic element 143 is an N-pole, an included 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 an S-pole, the fifth magnetic pole of the third magnetic element 143 is an S-pole, and an included 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 the embodiment of the present application, 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 understood 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 bearing housing 11, and the specific mounting manner and the mounting position are not limited in the present application. In a specific example of the present application, the first magnetic pole of the first magnetic element 141 is exposed to the bearing 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 in the bearing housing 11, the second magnetic element 142 is insulated with respect to the pair of stationary contact conductive elements 12 and the movable contact conductive assembly 13, and the third magnetic element 143 is insulated with respect to the pair of stationary contact conductive elements 12 and the movable contact conductive assembly 13. The portion of the carrying case 11 covering the second magnetic element 142 and the third magnetic element 143 is made of an insulating material.

In this specific example, the bearing housing 11 has a fitting groove 111, and the first magnetic element 141 is fittingly fitted in the fitting groove 111. The first magnetic pole of the first magnetic element 141 is exposed to the carrying housing 11, and its magnetism is not affected by the housing obstruction. The first magnetic element 141 can protrude out of the assembling groove 111, and the height dimension of the first magnetic element 141 is greater than or equal to the depth dimension of the assembling groove 111, so that the first magnetic element 141 is more exposed to the bearing housing 11. The bearing housing 11 further has mounting grooves 112 concavely formed on a ground surface thereof, and the second magnetic member 142 and the third magnetic member 143 are respectively tightly fitted into the adjacent two mounting grooves 112.

In some embodiments of the present application, the switch layer 10 further includes a package housing 16 that is snap-fit to the carrier housing 11. The package housing 16 has a first recess 161 corresponding to the mounting recess 112, and the second magnetic element 142 and the third magnetic element 143 can be enclosed between the mounting housing of the carrier housing 11 and the first recess 161 of the package housing 16.

The moving contact conductive member 131 is engaged with or disengaged from the fixed contact conductive member 12 to generate an arc, and accordingly, a position adjacent to where the fixed contact conductive member 12 and the moving contact conductive member 131 are in contact is a position where an arc is generated. Therefore, at least one magnetic element may be disposed adjacent to the position where the stationary conductive member 12 and the movable conductive member 131 are in contact, and the arc deflection may be guided by the magnetic element upon generation of the arc.

In the embodiment of the present application, each of the pair of stationary contact conductive members 12 has a stationary contact conductive end 121, and the movable contact conductive member 131 has a pair of movable contact conductive ends 1311. During the movement of the movable contact conducting member 131 relative to the stationary contact conducting member 12, the pair of movable contact conducting ends 1311 of the movable contact conducting member 131 are engaged with or disengaged from the pair of stationary contact conducting ends 121 of the pair of stationary contact conducting members 12, respectively. That is, during the movement of the movable contact conductive member 131 with respect to the stationary contact conductive member 12, the movable contact conductive member 131 comes into contact with the stationary contact conductive member 12 at the stationary contact conductive end 121 of the stationary contact conductive member 12.

Accordingly, a magnetic element may be disposed at a position adjacent to the stationary contact terminal 121. In a 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.

During the moving process of the movable contact conductive member 131 relative to the fixed contact conductive member 12, the arc between the fixed contact conductive member 12 and the movable contact conductive member 131 moves along the moving track of the movable contact conductive member 131 without interference of external factors such as a magnetic field.

Accordingly, a magnetic member may be disposed at a position corresponding to a moving path of the movable contact conductive member 131, and the position may correspond to the moving path of the movable contact conductive member 131 in an axial direction set by the switch layer 10 or may correspond to the moving path of the movable contact conductive member 131 in a radial direction set by the switch layer 10. And in order to ensure that the magnetic field generated by the magnetic element can act on the electric arc between the fixed contact conductive element 12 and the movable contact conductive element 131, the magnetic element can be arranged at a position opposite to the moving path of the movable contact conductive element 131.

In a specific example of the present application, the second magnetic element 142 and the third magnetic element 143 are both located in a middle region of a moving path of the movable contact conducting 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 a moving range of the arc in a specific direction. Specifically, the second magnetic element 142 is located in the middle region of the moving path of the moving contact conductive element 131 in the radial direction set by the switch layer 10, and the third magnetic element 143 is located in the middle region of the moving path of the moving contact conductive element 131 in the radial direction set by the switch layer 10.

The shape of each of the magnetic elements is not limited to the present application, 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 with other shapes, for example, a trapezoid shape, an arch shape, a rectangular shape, a triangular shape, and the like.

In order to make the magnetic field generated by the second and third magnetic elements 142 and 143 cover the moving path of the moving contact conductive element 131 as much as possible to act on the arc, it is preferable that the shapes of the second and third magnetic elements 142 and 143 are identical to the moving path of the moving contact conductive element 131. In the present embodiment, the movable contact conducting member 131 moves along an arc-shaped path, and accordingly, in some embodiments of the present application, the second magnetic member 142 and the third magnetic member 143 each have an arc-shaped structure extending along the moving path of the movable contact conducting member 131.

It is worth mentioning 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, and the arc extinguishing groove 15 is disposed on the deflected path of the arc, and can force the arc entering into it to be thinned and elongated based on the "narrow slit principle" to accelerate the breaking and extinction of the arc, in such a way, the arc extinguishing capability of the electrical isolation switch is enhanced.

In the embodiment of the present application, the arc is deflected by the magnetic field of the magnetic element and bypasses around the magnetic element. Accordingly, an arc extinguishing groove 15 may be disposed around the magnetic assembly 14 and/or the movable contact conductive member 131.

Accordingly, in some embodiments of the present application, the carrier housing 11 has at least one arc chute 15 concavely formed therein, the at least one arc chute 15 being located around the magnetic assembly 14. The at least one arc-extinguishing chamber 15 comprises a first arc-extinguishing chamber 151 located on the outside of the magnetic assembly 14 and a second arc-extinguishing chamber 152 located on the inside of the magnetic assembly 14. Preferably, said first arc-extinguishing groove 151 and/or said second arc-extinguishing groove 152 extend along the movement path of said movable contact conducting element 131.

In some embodiments of the present application, the at least one arc-extinguishing groove 15 further comprises a third arc-extinguishing groove 153 located in the magnetic field assembly at a side of the magnetic elements in the circumferential direction set by the switching layer 10, for example, the first magnetic element 141 and the second magnetic element 142 are arranged in the circumferential direction set by the switching layer 10, and the third arc-extinguishing groove 153 is located between the first magnetic element 141 and the second magnetic element 142.

It is worth mentioning 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 an arc spraying port 113 communicated with the arc extinguishing chamber 15, and the arc spraying port 113 extends from the arc extinguishing chamber 15 to the outer surface of the carrying case 11, so that the arc can be guided out of the carrying case 11 through the arc spraying port 113. For another example, the switch layer 10 is provided with a blocking member 133 blocking between the pair of movable contact terminals 1311 of the movable contact conductive element 131 to ensure that an arc between one movable contact terminal 1311 of the pair of movable contact terminals 1311 and one stationary contact terminal 121 of the pair of stationary contact terminals 121 and an arc between the other movable contact terminal 1311 of the pair of movable contact terminals 1311 and the other stationary contact terminal 121 of the pair of stationary contact terminals 121 and a breaking process thereof are independent from 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 which are opposite to each other in the axial direction set by the switch layer 10, and the blocking 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 switch layer 10 and is disposed between the two movable contact conductive terminals 1311 in the circumferential direction set by the switch layer 10.

Accordingly, the present application proposes an arc extinguishing method according to the arc extinguishing principle of the electrical isolation switch, the arc extinguishing method comprising: s110, disposing at least two magnetic elements on the moving path of the movable contact conductive element 131, wherein the magnetic poles of at least two of the at least two magnetic elements are oriented differently; and S120, bending the arc generated by the movable contact conductive element 131 and the pair of fixed contact conductive elements 12 in different modes through the at least two magnetic elements to prolong the moving path of the arc.

In summary, an electrical disconnector and an arc extinguishing method based on the embodiments of the present application are illustrated, in which the electrical disconnector utilizes a magnet arc extinguishing scheme to extinguish arc, and adjusts a magnetic field formed by a magnetic element by adjusting a disposition manner of the magnetic element, so that the magnetic field formed by the magnetic element can bend the arc differently to elongate the arc, and accelerate the breaking and extinguishing of the arc, in such a way, the arc extinguishing capability of the electrical disconnector is enhanced.

The present application and its embodiments are described above, the description is not limited, and what is shown in the drawings is only one of the embodiments of the present application, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they do not inventively design similar structural embodiments and embodiments to the above-mentioned embodiments without departing from the spirit of the invention, and therefore all such modifications and changes are deemed to fall within the scope of the invention.

Claims (10)

1. A switching layer, comprising: a load bearing housing; a pair of stationary contact conductive members and a movable contact conductive assembly mounted to the carrier housing, wherein the movable contact conductive assembly includes a movable contact conductive member movable relative to the pair of stationary contact conductive members, the movable contact conductive member adapted to be moved to selectively engage or disengage the pair of stationary contact conductive members; the magnetic assembly comprises a first magnetic element and a second magnetic element which are arranged on the bearing shell and positioned on the motion path of the movable contact conducting element; wherein there is a difference between a first magnetic field generated by the first magnetic element and a second magnetic field generated by the second magnetic element.

2. The switching layer of claim 1, wherein the magnetic pole orientation of the first magnetic element is different from the magnetic pole orientation of the second magnetic element.

3. The switching layer of claim 2, wherein the first magnetic element has a first magnetic pole facing the movable contact conductive member and a second magnetic pole opposite the first magnetic pole, the second magnetic element has a third magnetic pole facing the movable contact conductive member and a fourth magnetic pole opposite the third magnetic pole, the first magnetic pole of the first magnetic element being opposite in polarity from the third magnetic pole of the second magnetic element.

4. The switching layer of claim 3, wherein the first magnetic element has a first central axis, the second magnetic element has a second central axis, the first central axis of the first magnetic element and the second central axis of the second magnetic element are parallel to each other, and the first central axis of the first magnetic element and the second central axis of the second magnetic element are perpendicular to a plane of motion of the movable contact conducting element.

5. The switching layer of claim 1, wherein the first magnetic element has a first magnetic pole facing the movable contact conductive member and a second magnetic pole opposite to the first magnetic pole, the second magnetic element has a third magnetic pole facing the movable contact conductive member and a fourth magnetic pole opposite to the third magnetic pole, the first magnetic pole of the first magnetic element and the third magnetic pole of the second magnetic element have the same magnetic pole, and an included angle between a magnetic pole direction of the first magnetic element and a magnetic pole direction of the second magnetic element is greater than 0 ° and equal to or less than 90 °, wherein the magnetic pole direction of the first magnetic element is a direction in which a strongest N-pole point of the first magnetic element points to a strongest S-pole point, and the magnetic pole direction of the second magnetic element is a direction in which a strongest N-pole point of the second magnetic element points to a strongest S-pole point.

6. The switching layer of claim 1 wherein each of the pair of stationary conductive elements has a stationary conductive end, the first magnetic element being located below the stationary conductive end of one of the pair of stationary conductive elements.

7. The switching layer of claim 6, wherein the first magnetic element has a circular cross-section and the second magnetic element has a sector-shaped cross-section.

8. The switching layer of claim 7, wherein the magnetic assembly further comprises a third magnetic element adjacent to the second magnetic element, the first magnetic element having a magnetic pole facing opposite the magnetic pole facing of the second magnetic element, the second magnetic element having a magnetic pole facing opposite the magnetic pole facing of the third magnetic element, the first magnetic element having a magnetic pole facing the same as the magnetic pole facing of the third magnetic element.

9. The switching layer of claim 1, wherein the carrier housing has at least one arc chute concavely formed therein, the at least one arc chute including a first arc chute located on an outer side of the magnetic assembly, a second arc chute located on an inner side of the magnetic assembly, and a third arc chute located between the first and second magnetic elements of the magnetic assembly.

10. An electrical isolation switch, comprising: at least one switching layer according to any one of claims 1 to 9; and an actuation control element operatively connected to the at least one switch layer, wherein the actuation control element is configured to control the at least one switch layer to switch between a closed state and an open state.

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