CN218004705U

CN218004705U - Electrical isolating switch

Info

Publication number: CN218004705U
Application number: CN202221593007.5U
Authority: CN
Inventors: 王刚; 张玉霖; 张强; 谢顺亮
Original assignee: Green Century Technology Co ltd
Current assignee: Green Century Technology Co ltd
Priority date: 2021-06-28
Filing date: 2022-06-24
Publication date: 2022-12-09
Anticipated expiration: 2032-06-24
Also published as: CN218038967U; CN218038968U; CN115602473A; CN218038969U; CN115602475A; CN113345747A; CN115602474A

Abstract

The application discloses electrical isolation switch, wherein, each switch layer of electrical isolation switch includes bearing the casing, install in a pair of stationary contact conducting element and the movable contact conducting assembly of bearing the casing, and, be used for carrying out the first magnetic element that deflects the electric arc that produces in the movable contact conducting assembly's movable contact conducting element and a pair of the stationary contact conducting element joint or throw off, bearing the casing and having at least one arc extinguishing groove that is located on the deflection route of electric arc, in order to promote the arc extinguishing performance of the opening layer through the physical intervention of at least one arc extinguishing groove.

Description

Electrical isolating switch

Technical Field

The application relates to the field of switches, in particular to an electrical isolating switch for a photovoltaic system.

Background

In recent years, under the call of the green low-carbon development concept, the photovoltaic industry becomes the industry which is greatly supported and valued by the country, the trend of high-speed development is presented, and the safety of a photovoltaic system also becomes a hotspot problem in the industry.

In a photovoltaic system, a photovoltaic dc switch plays an important role in the safety of the photovoltaic system. The photovoltaic direct current switch is mainly used for controlling direct current between the inverter and the photovoltaic cell panel so as to cut off a direct current path between the inverter and the photovoltaic cell panel when a photovoltaic system is installed and the inverter is replaced or maintained, and electric shock and equipment damage are avoided. Therefore, the reliability of the photovoltaic direct-current switch is not only related to the good operation of the whole photovoltaic system, but also related to the stable development of the photovoltaic industry.

In the application of the photovoltaic direct current switch, the arc extinguishing performance of the photovoltaic direct current switch is an important index influencing the reliability of the photovoltaic direct current switch. Specifically, the photovoltaic direct current switch is provided with a fixed contact and a movable contact capable of moving relative to the fixed contact, and the photovoltaic direct current switch can be used for realizing the on-off of a direct current circuit by controlling the on-off of the movable contact and the fixed contact. At the moment that the moving contact moves away from the static contact, the neutral medium between the moving contact and the static contact is dissociated to form a conductive electric arc, so that the direct current loop cannot be disconnected in time, and the direct current loop cannot be truly disconnected until the electric arc between the moving contact and the static contact is extinguished.

The larger the voltage or current in the dc circuit, the more arcs are generated during the switching off of the dc circuit by the photovoltaic dc switch, which may lead to the dc switch being burnt out. In recent years, the dc transmission system is continuously developing towards high voltage, which puts higher demands on the arc extinguishing performance of the photovoltaic dc switch.

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

Therefore, a new arc extinguishing scheme suitable for photovoltaic dc switches is desired.

SUMMERY OF THE UTILITY MODEL

An advantage of the present application is to provide an electrical isolation switch, wherein the electrical isolation switch is finely adjusted on the basis of a conventional magnetic arc extinguishing scheme to form a narrow space acting on an arc on a deflection path of the arc, the narrow space being capable of forcing an arc entering therein to be thinned and lengthened to accelerate breaking and extinguishing of the arc, in such a manner that an arc extinguishing capability of the electrical isolation switch is enhanced.

Another advantage of the present application is to provide an electrical isolation switch, wherein the electrical isolation switch can enhance the arc extinguishing capability of the electrical isolation switch without greatly increasing the overall size of the electrical isolation switch or the overall size of the electrical isolation switch by configuring the narrow space. That is, the electrical isolation switch that this application provided can have relatively stronger arc extinguishing performance when satisfying the miniaturized trend of switch.

It is yet another advantage of the present application to provide an electrical isolation switch, wherein in some embodiments of the present application, the electrical isolation switch is capable of dynamically varying a width dimension of a narrow space into which an arc is allowed to enter, and further thinning the arc entering the narrow space by "dynamic reducing," in such a way as to increase an arc extinguishing rate.

According to an aspect of the present application, there is provided an electrical disconnector, comprising: at least one switching layer; and an actuation control element operably 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; wherein each of the switch layers comprises: a load bearing housing; a pair of stationary contact conductive members mounted to said carrier housing and a movable contact conductive assembly comprising an insulating turntable and a movable contact conductive member mounted to said insulating turntable, said movable contact conductive assembly being rotatable relative to a pair of said stationary contact conductive members such that said movable contact conductive member can be selectively engaged with or disengaged from a pair of said stationary contact conductive members to control switching of said switching layer between said closed state and said open state; and a first magnetic element vertically arranged and corresponding to the moving path of the movable contact conductive element, wherein the first magnetic element is suitable for deflecting the electric arc generated in the process of engaging or disengaging the movable contact conductive element and the fixed contact conductive element; the bearing shell is provided with at least one arc extinguishing groove adjacent to the first magnetic element, and the insulating rotary disc is provided with a notch structure; wherein, in the process that the movable contact conductive assembly moves relative to the pair of static conductive elements, the peripheral edge of the notch structure of the insulation turntable extends into the at least one arc extinguishing groove in the radial direction set by the switch layer.

In the above-described electrical isolating switch, the first magnetic member has a first magnetic pole and a second magnetic pole which are opposed, the first magnetic pole faces the moving path of the movable contact conductive member, and the second magnetic pole is away from the first magnetic pole along the axial direction of the movable contact conductive member.

In the above-described electrical isolating switch, the peripheral edge portion of the notch structure has an inner edge, wherein the inner edge protrudes into the at least one arc extinguishing groove in a radial direction set by the switch layer during the movement of the movable contact conductive member with respect to the pair of stationary contact conductive members.

In the above electrical isolation switch, the peripheral portion of the notch structure has an inner edge and an outer edge opposite to the inner edge, and during the movement of the movable contact conductive assembly relative to the pair of stationary conductive elements, the inner edge and/or the outer edge of the peripheral portion of the notch structure extends into the at least one arc extinguishing groove in the radial direction set by the switch layer.

In the above electrical isolation switch, an extension manner of a peripheral portion of the notch structure is different from an extension manner of the at least one arc extinguishing groove.

In the above electrical isolation switch, the peripheral edge of the notch structure includes a first edge and a second edge, and the second edge protrudes from the first edge.

In the electrical isolation switch, the carrier housing has a first arc-extinguishing groove and a second arc-extinguishing groove formed on a deflection path of the arc, the first arc-extinguishing groove is formed on an outer side of the first magnetic element, the second arc-extinguishing groove is formed on an inner side of the first magnetic element, and a peripheral portion of the notch structure of the insulating turntable extends into the first arc-extinguishing groove and/or the second arc-extinguishing groove in a radial direction set by the switch layer in a process that the movable contact conductive assembly moves relative to the pair of stationary contact conductive elements.

In the above-described electrical isolating switch, the peripheral edge portion of the notch structure has an inner edge, and the inner edge of the peripheral edge portion of the notch structure extends into the second arc extinguishing groove in the radial direction set by the switch layer in the process of moving the movable contact conductive member relative to the pair of stationary contact conductive members.

In the above electrical isolating switch, the peripheral portion of the notch structure has an inner edge and an outer edge opposite to the inner edge, and during the process of moving the movable contact conductive member relative to the pair of stationary contact conductive elements, the inner edge of the peripheral portion of the notch structure extends into the second arc-extinguishing groove in the radial direction set by the switch layer, and/or the outer edge of the peripheral portion of the notch structure extends into the first arc-extinguishing groove in the radial direction set by the switch layer.

In the above electrical disconnector, the carrier case has a first arc-extinguishing groove formed on a deflection path of the arc, the first arc-extinguishing groove being formed on an outer side of the first magnetic member, and an outer edge of the insulating turntable protrudes into the first arc-extinguishing groove in a radial direction set by the switching layer during movement of the movable contact conductive assembly with respect to the pair of stationary conductive members.

Further objects and advantages of the present application will become apparent from an understanding 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 perspective view of an electrical disconnector according to an embodiment of the present application.

Fig. 2 illustrates a perspective view of the internal structure of one embodiment of the electrical disconnect switch according to an embodiment of the present application.

Fig. 3 illustrates a partially disassembled perspective view of the electrical disconnect switch illustrated in fig. 2 in accordance with an embodiment of the present application.

Fig. 4 illustrates a partially exploded perspective view of another embodiment of the electrical disconnect switch according to an embodiment of the present application.

Fig. 5A illustrates a perspective view of a plurality of switching layers of yet another implementation of the electrical isolation switch according to an embodiment of the present application.

Fig. 5B illustrates another perspective view of the multiple switching layers of the electrical isolation switch illustrated in fig. 5A, according to an embodiment of the present application.

Fig. 6 illustrates a disassembled schematic view of the plurality of switching layers of the electrical isolation switch illustrated in fig. 5A according to an embodiment of the present application.

Fig. 7A illustrates a perspective view of one switching layer of the electrical isolation switch illustrated in fig. 5A, according to an embodiment of the present application.

Fig. 7B illustrates a perspective view of another switching layer of the electrical isolation switch illustrated in fig. 5A, according to an embodiment of the present application.

Fig. 8A illustrates a schematic plan view of one implementation of a switching layer of the electrical disconnect switch illustrated in fig. 2 according to an embodiment of the present application.

Fig. 8B illustrates a schematic plan view of another implementation of the switching layer of the electrical disconnect switch illustrated in fig. 2 according to an embodiment of the present application.

Fig. 9A illustrates a schematic structural diagram of one side of a switching layer of the electrical isolation switch illustrated in fig. 2 according to an embodiment of the present application.

Fig. 9B illustrates a schematic structural diagram of the other side of the switching layer of the electrical isolation switch illustrated in fig. 2 according to an embodiment of the present application.

Fig. 10 illustrates a schematic plan view of a carrier housing of a switching layer of the electrical disconnect switch illustrated in fig. 2 in accordance with an embodiment of the present application.

Fig. 11A illustrates a partial plan view of one switching layer of the electrical isolation switch illustrated in fig. 5A, in accordance with an embodiment of the present application.

Fig. 11B illustrates another plan view of a variant implementation of one switching layer of the electrical isolation switch illustrated in fig. 5A according to an embodiment of the present application.

Fig. 12 illustrates a schematic plan view of a carrier housing of one switching layer of the electrical isolation switch illustrated in fig. 5A according to an embodiment of the present application.

Fig. 13 illustrates a partial plan view of another switching layer of the electrical isolation switch illustrated in fig. 5A according to an embodiment of the present application.

Fig. 14 illustrates a plan view of a carrier housing of another switching layer of the electrical isolation switch illustrated in fig. 5A according to an embodiment of the present application.

Fig. 15 illustrates a state switching process diagram of a switching layer of the electrical isolation switch according to an embodiment of the present application.

Fig. 16 illustrates another state switching process diagram of the switching layer of the electrical isolation switch according to an embodiment of the present application.

Fig. 17A illustrates a perspective view of an insulating turntable mounted with a moving contact conductive element of the switching layer according to an embodiment of the present application.

Fig. 17B illustrates another perspective view of the insulated rotating disk with the movable contact conductive element mounted thereon of the switching layer according to the embodiment of the present application.

Figure 18A illustrates a schematic plan view of one positional relationship between the insulating rotating disk and the arc chute of the switching layer in accordance with an embodiment of the present application.

Figure 18B illustrates a schematic plan view of another positional relationship between the insulating rotating disk and the arc chute of the switching layer in accordance with an embodiment of the present application.

Fig. 19A illustrates a schematic plan view of a variant implementation of the insulating carousel of the switching layer according to an embodiment of the present application.

Figure 19B illustrates a schematic plan view of yet another positional relationship between the insulating rotating disk and the arc chute of the switching layer in accordance with an embodiment of the present application.

Fig. 20 is a schematic plan view illustrating a positional relationship among the movable contact conductive element, the stationary contact conductive element, and the magnetic element in the switch layer of the electrical isolation switch according to the embodiment of the present application.

Fig. 21A illustrates a force diagram of an arc in the electrical isolation switch according to an embodiment of the present application.

Fig. 21B illustrates another force diagram of an arc in 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 schemes for arc extinction of the dc switch, 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 scheme suitable for the photovoltaic direct current switch is expected.

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 magnets so as to elongate it and thus break it, in order to draw it long and thin enough to break it, it is necessary to provide enough space for the arc to stretch, which undoubtedly increases the overall size of the dc switch. That is, in the case of the solution of arc extinguishing by the magnet, the space of the housing is a technical contradiction, and if the space inside the housing is not increased to provide a sufficient arc breaking space, the performance of arc extinguishing by the magnet is not good, and if the space inside the housing is increased, the increase of the overall size of the dc switch is caused, which is not in line with the trend of miniaturization of the dc switch.

Based on this, the inventors of the present application tried to configure an intervention mechanism for the deflected arc on the basis of the arc extinction by the magnet, so as to enhance the arc extinction capability of the dc switch through an appropriate intervention mechanism. It should be noted that in the conventional dc switch for extinguishing arc by means of magnets, the extinction of arc is a natural law that depends on the arc becoming thinner during elongation without additional intervention mechanisms. Accordingly, in the solution of the present application, a narrow space capable of acting on the arc is arranged on the deflection path of the arc, wherein the narrow space can force the arc entering into it to be thinned and lengthened based on the "narrow slit principle" to accelerate the breaking and extinguishing of the arc, in such a way, the arc extinguishing capability of the electrical disconnector is enhanced. Here, the narrow space is a newly-provided intervention mechanism.

More specifically, in the conventional scheme of extinguishing the arc by the magnet, the arc is deflected to a specific direction under the action of the magnetic field, that is, the magnetic field generated by the magnet can control the deflection mode of the arc. In this way, it is possible to configure a magnetic element (for example, a magnet or a coil, etc.) within the dc switch to direct the arc in a specific manner by means of the specific magnetic field generated by it so as to deflect it in a predetermined manner, while configuring a narrow space on the deflection path of the arc, which is capable of interfering with the arc, so as to rapidly thin and elongate the arc by means of the physical interference of the narrow space to achieve rapid arc extinction. It is worth mentioning that, since the magnetic field can deflect the arc in a specific direction, the deflection path of the arc and the position of the narrow space on the deflection path of the arc can be selectively and flexibly planned.

By configuring the narrow space, the electric isolating switch can enhance the arc extinguishing capability of the electric isolating switch on the premise of not greatly increasing the overall size of the electric isolating switch or the overall size of the electric isolating switch. That is, the electrical isolation switch that this application provided can have relatively stronger arc extinguishing performance when satisfying the miniaturized development trend of switch. Furthermore, the electrical isolation switch can be obtained by structural modification of a conventional dc switch, for example, modification can be realized by replacing a housing of the conventional dc switch.

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 isolation switch

As shown in fig. 1 to 21B, the electrical isolation switch according to the embodiment of the present application is illustrated, which is suitable for being applied to a photovoltaic system to control electrical disconnection between a photovoltaic panel and an inverter. It should be understood that, although the electrical isolation switch is applied to a photovoltaic system as an example, in other embodiments of the present application, the electrical isolation switch may also be applied to other occasions, such as a wind power system, for which the present application is not limited.

As shown in fig. 1 to 6, the electrical isolation switch according to the embodiment of the present application includes at least one switch layer 10 and an actuation control component 20 configured to control the at least one switch layer 10 to switch between a closed state and an open state, wherein the actuation control component 20 is operatively connected to the at least one switch layer 10. In order to improve the performance of the rotary electrical switch, in some embodiments of the present application, the rotary electrical switch generally includes a plurality of switch layers 10 stacked on top of each other, i.e., the at least one switch layer 10 includes at least two switch layers 10, and each switch layer 10 of the at least two switch layers 10 is stacked on top of each other to form a multi-layer switch layer structure. In some embodiments of the present application, the electrical disconnector further comprises a bottom mounting structure for carrying the at least one switching layer 10 and the actuation control assembly 20 thereon, for mounting the electrical disconnector to a corresponding location on a mounting rail, such as a distribution cabinet, by means of the bottom mounting structure.

The actuation control unit 20 is mounted on top of the at least two switch layers 10 and is used for controlling the switching of the electrical states of the at least two switch layers 10, i.e. controlling the closing or opening of the at least two switch layers 10. As shown in fig. 4, in some embodiments of the present application, the actuating control assembly 20 includes an actuating casing 21, an energy storage assembly 22 and a rotating assembly 23, wherein the energy storage assembly 22 and the rotating assembly 23 are accommodated in the actuating casing 21, the at least two switch layers 10 are rotatably connected to a lower end of the energy storage assembly 22, and the rotating assembly 23 is disposed at an upper end of the energy storage assembly 22 and is used for rotating the energy storage assembly 22, so as to drive the at least two switch layers 10 to realize state switching of the at least two switch layers 10. Meanwhile, in the embodiment of the present application, the switch layers 10 are mutually assembled in a transmission manner, that is, when the switch layer 10 at the topmost layer is rotated by the energy storage assembly 22, the switch layer 10 at the bottom layer is driven.

Specifically, in the embodiment of the present application, the rotating assembly 23 includes a rotating shaft 231 penetrating into the actuating housing 21 and fixed to the energy storage assembly 22 in an inserting manner, and a knob 232 for driving the rotating shaft 231. In a specific example of the present application, the knob 232 is mounted to an upper end portion of the rotation shaft 231. In some embodiments of the present application, the rotating assembly 23 further comprises a nut 233 fixed to the actuating housing 21, wherein the rotating shaft 231 passes through the nut 233 and extends into the actuating housing 21, it being understood that the rotating shaft 231 is rotatable relative to the nut 233. In order to improve the sealing performance, in one specific example of the present application, the rotating assembly 23 further includes a sealing gasket 234 disposed between the actuating housing 21 and the nut 233.

The energy storage assembly 22 includes a driving turntable 221, a rotary base 223 and an energy storage element 222, wherein the lower end of the rotary base 223 is rotatably connected to the topmost switch layer 10, the energy storage element 222 is disposed in the rotary base 223, and the driving turntable 221 is mounted on the rotary base 223. Accordingly, in the embodiment of the present application, the rotating shaft 231 is fixed to the upper end of the driving dial 221, that is, when the rotating shaft 231 is rotated by the knob 232, it can drive the driving dial 221 to rotate relative to the swivel base 223. That is, in the embodiment of the present application, the driving dial 221 is fixed to the lower end portion of the rotating shaft 231, and the knob 232 is fixed to the upper end portion of the rotating shaft 231, so that the knob 232 can control the movement state of the driving dial 221 by conduction through the rotating shaft 231.

In the present embodiment, the driving turntable 221 includes a turntable body having an insertion head, and an actuating member 2211 and a releasing member 2212 extending downward from the turntable body, and the actuating member 2211 and the releasing member 2212 extend downward from the outer circumference of the turntable body. The angle at which the actuator 2211 and the release 2212 are set with respect to the center of the dial body affects the operational control of the rotary electrical switch. In some embodiments of the present application, the actuating member 2211 and the releasing member 2212 are disposed at an included angle ranging from 170 ° to 175 ° with respect to the center of the turntable body, and the switching of the states of the at least two switch layers 10 can be achieved by rotating the knob 232 by approximately 80 ° to 100 ° in a predetermined direction, and accordingly, the actuating angle of the switch layers 10 is 80 ° to 100 °. In some embodiments of the present application, the actuating member 2211 and the releasing member 2212 are disposed at an angle ranging from 175 ° to 180 ° with respect to the center of the turntable body, and the actuating angle of the switching layer 10 is from 85 ° to 95 °.

As shown in fig. 1, in some embodiments of the present application, the electrical isolation switch includes a plurality of switch layers 10 stacked on top of each other. In the embodiment of the present application, each switch layer 10 includes a carrying housing 11, a pair of stationary conductive elements 13 and a movable contact conductive element 12 mounted on the carrying housing 11, and at least one magnetic element. The movable contact conductive member 12 of the switch layer 10 closest to the actuation control assembly 20 (i.e. the topmost switch layer 10) in the electrical isolation switch is drivingly connected with the energy storage member 22 of the actuation control assembly 20, and the movable contact conductive members 12 of each two adjacent switch layers 10 in the electrical isolation switch are drivingly connected, so that under the control of the actuation control assembly 20, the movable contact conductive member 12 of each switch layer 10 can be selectively engaged with or disengaged from the stationary contact conductive member 13 thereof to realize the state switching (closing/opening) of the switch layers 10.

As shown in fig. 4, 8A and 8B, the carrier housing 11 has a first mounting cavity 1101, and the movable contact conductive assembly 12 is fittingly fitted in the first mounting cavity 1101 of the carrier housing 11. Specifically, the movable contact conductive assembly 12 includes an insulating turntable 121, a dial member 122 for driving the insulating turntable 121, and a movable contact conductive member 123 formed between the first insulating turntable 121 and the first dial member 122, as shown in fig. 6 to 7B.

More specifically, in the present embodiment, the movable contact conducting element 123 is fittingly disposed to the insulating turntable 121 along the central axis of the insulating turntable 121, and the length dimension of the movable contact conducting element 123 is similar to the diameter of the insulating turntable 121, so that the edge of the movable contact conducting element 123 is approximately flush with the edge of the insulating turntable 121 after the movable contact conducting element 123 is mounted to the insulating turntable 121 along the central axis of the insulating turntable 121. Accordingly, the movable contact conducting member 123 has a first movable contact conducting end 1231 formed at a first end portion thereof and a second movable contact conducting end 1232 formed at a second end portion thereof (opposite to the first end portion), that is, in the embodiment of the present application, the first movable contact conducting end 1231 of the movable contact conducting member 123 is formed at the edge of the insulating turntable 121, and the second movable contact conducting end 1232 of the movable contact conducting member 123 is formed at the edge of the insulating turntable 121. The first movable contact terminal 1231 and the second movable contact terminal 1232 form a pair of dynamic contacts, and the movable contact conductive member 123 is adapted to be moved to selectively engage or disengage the pair of dynamic contacts with the pair of stationary contact conductive members 13 to effect switching of the state of each of the switch layers 10.

It should be noted that in some embodiments of the present application, the insulation rotary table 121 is further provided with a separating and blocking portion 1212, as shown in fig. 17B, for separating one movable contact conductive end of the movable contact conductive element 123 from one stationary contact conductive element 13 of the pair of stationary contact conductive elements 13 that is not matched with the movable contact conductive end during the state switching process of the switch layer 10, so as to avoid short circuit caused by a short creepage distance due to the closer distance between the movable contact conductive element 123 and the stationary contact conductive element 13 during the state switching process of the switch layer 10.

The shape of the moving contact conducting member 123 and the arrangement of the moving contact conducting member 123 are not limited in this application, for example, the moving contact conducting member 123 may include two independent dynamic contact portions, and the two dynamic contact portions are integrally combined with the insulating turntable 121 through a molding process.

In the embodiment of the present application, the dial element 122 of the switch layer 10 is connected to the actuation control assembly 20 in a manner of engaging with the energy storage assembly 22, the dial element 122 is engaged with the insulating turntable 121 in a positioned manner, and when the dial element 122 is driven by the actuation control assembly 20 to rotate, the insulating turntable 121 mounted with the movable contact conductive element 123 is driven to rotate. The dial element 122 may also be drivingly connected to the insulating turntable 121 by other means, for example, being fixed to the insulating turntable 121, being integrally connected to the insulating turntable 121. In the present example, the dial element 122 of the electrical disconnector closest to the switch layer 10 of the actuation control assembly 20 is drivingly connected to the energy storage assembly 22 of the actuation control assembly 20, the dial elements 122 of each adjacent two switch layers 10 of the electrical disconnector are engaged with each other, the dial element 122 of each switch layer 10 of the electrical disconnector is drivingly connected to the actuation control assembly 20, in such a way that the movable contact conductive member 12 of each adjacent two switch layers 10 of the electrical disconnector is drivingly connected, and the movable contact conductive member 12 of each switch layer 10 of the electrical disconnector is drivingly connected to the actuation control assembly 20.

In the embodiment of the present application, a pair of the static conductive elements 13 are mounted on the bearing housing 11, each of the static conductive elements 13 has a static conductive end 131, and the static conductive ends 131 form a static contact portion. The pair of the static contact conductive elements 13 are mounted on the carrying housing 11 at a mounting position such that the static contact conductive ends 131 of the pair of the static contact conductive elements 13 are located on the central axis of the carrying housing 11 and adjacent to the edge of the insulating rotary table 121, and by such a position and structure configuration, the first movable contact conductive end 1231 and the second movable contact conductive end 1232 of the movable contact conductive element 123 of the movable contact conductive assembly 12 can be simultaneously engaged with or disengaged from the static contact conductive ends 131 of the pair of the static contact conductive elements 13 under the action of the rotating assembly 23 and the energy storage assembly 22 of the actuation control assembly 20, so as to realize the state switching of the switch layer 10. When the switch layer 10 is switched to the closed state, the movable contact conductive member 123 is in contact with the stationary contact conductive member 13, and when the switch layer 10 is switched to the open state, the movable contact conductive member 123 is separated from the stationary contact conductive member 13.

As shown in fig. 2, in the embodiment of the present application, a pair of the static conductive elements 13 are disposed on two opposite sides of the first mounting cavity 1101 of the bearing housing 11, wherein the pair of the static conductive elements 13 are mounted on the periphery of the bearing housing 11. Specifically, the portion of the static contact conductive element 13 for electrically connecting other electrical devices is located as an electrical connection end 132, and accordingly, the static contact conductive element 13 has a static contact conductive end 131, an electrical connection end 132, and a static contact extension 133 extending from the static contact conductive end 131 and the electrical connection end 132. In some embodiments of the present application, the electrical end 132 of at least one of the pair of static contact conductive elements 13 extends out of the load housing 11. It should be understood that the electrical terminals 132 of a pair of the static contact conductive elements 13 may not extend out of the carrying housing 11, and the application is not limited thereto.

In the modified embodiment of the present application, the pair of stationary contact conductive elements 13 may be mounted to the carrier housing 11 in other manners, for example, the pair of stationary contact conductive elements 13 are mounted to the carrier housing 11 in a fitting manner, or one of the pair of stationary contact conductive elements 13 is mounted to the carrier housing 11 in a fitting manner.

As described above, there are many schemes for arc extinguishing of the dc switch, 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.

Specifically, through the research on the scheme of the inventor of the application for extinguishing the arc of the magnet, the following results are found: in the solution of deflecting the arc by means of the magnets so as to elongate and thus break it, in order to draw it long and thin enough to break it, it is necessary to provide enough space for the arc to stretch, which undoubtedly increases the overall size of the direct current switch. That is, in the case of the solution of arc extinguishing by the magnet, the space of the housing is a technical contradiction, and if the space inside the housing is not increased to provide a sufficient arc breaking space, the performance of arc extinguishing by the magnet is not good, and if the space inside the housing is increased, the increase of the overall size of the dc switch is caused, which is not in line with the trend of miniaturization of the dc switch.

By configuring the narrow space, the electrical isolation switch can enhance the arc extinguishing capability of the electrical isolation switch without greatly increasing the overall size of the electrical isolation switch or increasing the overall size of the electrical isolation switch. That is, the electrical isolation switch that this application provided can have relatively stronger arc extinguishing performance when satisfying the miniaturized trend of switch. Furthermore, the electrical isolation switch can be obtained by structural modification of a conventional dc switch, for example, modification can be realized by replacing a housing of the conventional dc switch.

Accordingly, as shown in fig. 2 and 9B, in the embodiment of the present application, each switching layer 10 of the electrical disconnection switch includes at least one first magnetic member 14 for deflecting an arc generated during engagement or disengagement of the movable contact conductive member 123 with or from the stationary contact conductive member 13 and at least one arc extinguishing groove in a deflection path of the arc, wherein the at least one arc extinguishing groove forms a narrow space in the deflection path of the arc.

Specifically, the arc is generated between the fixed contact conductive member 13 and the movable contact conductive member 123, and a moving trace of the arc almost coincides with a moving path of the movable contact conductive member 123 without the action of a magnetic field. Therefore, in the embodiment of the present application, the moving trace of the moving contact conductive element 123 is taken as a position reference to describe the arrangement manner of other elements.

In the embodiment of the present application, the first magnetic element 14 is mounted on the bearing housing 11 and disposed on the moving path of the moving contact conducting element 123. The particular manner in which the first magnetic element 14 is mounted is not limiting to the present application. For example, in one embodiment of the present application, the carrying housing 11 includes a bottom plate, the carrying housing 11 has a protrusion 1102 formed on the bottom plate and corresponding to the moving path of the movable contact conducting element 123, the first magnetic element 14 is fittingly installed in the protrusion 1102, and a peripheral wall of the protrusion 1102 is made of an insulating material. In another embodiment of the present application, the bearing housing 11 has a groove, and the protrusion 1102 is protrudingly formed in the groove.

More specifically, as shown in fig. 8A and 8B, in the present embodiment, the protrusion 1102 is formed below the movable contact conductive member 123, and at least a portion of the protrusion 1102 corresponds to the movable contact conductive member 123 in the axial direction set by the switch layer 10, that is, at least a portion of the protrusion 1102 overlaps the movable contact conductive member 123 in the axial direction set by the switch layer 10. Accordingly, at least a portion of the first magnetic element 14 fitted to the protrusion 1102 corresponds to a moving path of the moving contact conductive member 123 in the axial direction set by the switch layer 10, that is, at least a portion of the first magnetic element 14 overlaps with the moving path of the moving contact conductive member 123 in the axial direction set by the switch layer 10.

Further, the first magnetic element 14 has a first magnetic pole and a second magnetic pole opposite to each other, the first magnetic pole faces the moving path of the moving contact conductive element 123, and the second magnetic pole faces away from the first magnetic pole along the axial direction of the moving contact conductive assembly.

It is worth mentioning that the arc generated during the engagement or disengagement of the moving contact conductive element 123 and the fixed contact conductive element 13 is at least partially deflected upward or downward relative to the moving contact conductive element 123 by the magnetic field generated by the first magnetic element 14. To this end, in some embodiments of the present application, the insulating turntable 121 mounted to the movable contact conducting element 123 is provided with at least one notch structure 1211 as shown in fig. 18A and 18B.

The deflection path of the arc can be determined according to the magnetic pole orientation of the first magnetic element 14, and then the arrangement position and the arrangement mode of the arc extinguishing groove can be determined. Thus, the electrical isolation switch guides the arc to deflect according to a preset path through the magnetic field generated by the first magnetic element 14, and further, the arc entering the electrical isolation switch is thinned and elongated by utilizing a slit effect through an arc extinguishing groove arranged on the deflection path of the arc, so that rapid arc extinguishing is realized.

It is worth mentioning that, because the magnetic pole orientation of the magnetic element is determined, the path of the arc deflected by the magnetic element is determined, and the arrangement position of the arc-extinguishing groove can also be determined along with the determination of the deflection path, so that the position of the arc-extinguishing groove can be determined by selecting the position and the magnetic pole orientation of the magnetic element, or the position and the magnetic pole orientation of the magnetic element can be determined by selecting the position of the arc-extinguishing groove, so as to realize the arc-extinguishing without greatly increasing the overall size of the dc switch.

In the present embodiment, the arc generated during the engagement or disengagement of the movable contact conducting element 123 and the fixed contact conducting element 13 is at least partially deflected inward or outward relative to the movable contact conducting element 123 by the magnetic field generated by the first magnetic element 14, as shown in fig. 20 to 21B. The at least one arc chute comprises a first arc chute 111 and a second arc chute 112, as shown in figure 10. The first arc-extinguishing groove 111 is formed at the outer side of the moving contact conductive member 123, and the second arc-extinguishing groove 112 is formed at the inner side of the moving contact conductive member 123. Since the first magnetic member 14 is disposed on the moving path of the moving contact conductive member 123, accordingly, the first arc extinguishing groove 111 is located at the outer side of the first magnetic member 14, and the second arc extinguishing groove 112 is located at the inner side of the first magnetic member 14.

It is worth mentioning that when a large amount of arc is accumulated in the interior of the switching layer 10 for a long time, the internal structure of the switching layer 10 may be damaged, affecting the lifetime of the electrical isolation switch. In some embodiments of the present application, the first arc-extinguishing chamber 111 communicates with the outside, where the outside is with respect to the switching layer 10, i.e. the outside refers to a space outside the switching layer 10. In this way, the arc generated during the state switching of the switching layer 10 can be guided to the outside through the first arc-extinguishing chamber 111, so as to improve the structural stability and reliability of the electrical isolation switch. Specifically, at least one end of the first arc-extinguishing chamber 111 extends to an edge of the housing of the switch layer 10, so that the first arc-extinguishing chamber 111 communicates with the outside, as shown in fig. 11A to 16.

Further, in some embodiments of the present application, the second arc chute 112 communicates with the first arc chute 111. In this way, the moving path of the arc may be extended, and when the first arc chute 111 communicates with the outside, the arc entering the second arc chute 112 may also be guided to the outside through the first arc chute 111.

The number of first arc-extinguishing chambers 111 and second arc-extinguishing chambers 112 is not limited in this application and may be 1,2,3, or more, for which reason it is not limited in this application. For example, in one specific example of the present application, the at least one arc chute includes two first arc chutes 111 and two second arc chutes 112, wherein one first arc chute 111 and one second arc chute 112 are each adjacent to one of the stationary conductive elements 13 of a pair of the stationary conductive elements 13, and the other first arc chute 111 and the other second arc chute 112 are each adjacent to the other of the stationary conductive elements 13 of the pair of the stationary conductive elements 13.

It is worth mentioning that the distance of the first arc chute 111 or the second arc chute 112 from the first magnetic element 14 should be kept within a certain range, so that the arc enters the first arc chute 111 and the second arc chute 112 as much as possible. In the embodiment of the present application, the distance between the first arc-extinguishing groove 111 and the first magnetic element 14 is greater than 0 and less than or equal to 9 mm, and/or the distance between the second arc-extinguishing groove 112 and the first magnetic element 14 is greater than 0 and less than or equal to 9 mm. Specifically, the distance between the first arc-extinguishing groove 111 and the first magnetic element 14 in the radial direction of the bearing housing 11 is greater than 0 and 9 mm or less, and/or the distance between the second arc-extinguishing groove 112 and the first magnetic element 14 in the radial direction of the bearing housing 11 is greater than 0 and 9 mm or less.

Further, in some embodiments of the present application, the first arc extinguishing groove 111 and the second arc extinguishing groove 112 are formed in the bearing housing 11 of the switch layer 10, that is, the bearing housing 11 has the first arc extinguishing groove 111 and the second arc extinguishing groove 112, wherein the first arc extinguishing groove 111 is formed on the inner side of the protrusion 1102, the second arc extinguishing groove 112 is formed on the outer side of the protrusion 1102, and the first arc extinguishing groove 111 and the second arc extinguishing groove 112 are located on the lower side of the movable contact conductive element 123.

The manner in which the first arc-extinguishing chamber 111 and the second arc-extinguishing chamber 112 are formed is not a limitation of the present application. For example, in a specific example of the present application, the bearing housing 11 has a groove, the protrusion 1102 is formed in the groove, and the gap between the peripheral wall of the groove and the peripheral wall of the protrusion 1102 forms the first arc-extinguishing chamber 111 and the second arc-extinguishing chamber 112.

The opening of the first arc-extinguishing groove 111 and the opening of the second arc-extinguishing groove 112 face the movable contact element, the depth direction of the first arc-extinguishing groove 111 and the depth direction of the second arc-extinguishing groove 112 are consistent with the set axial direction of the switch layer 10, and the width direction of the first arc-extinguishing groove 111 and the width direction of the second arc-extinguishing groove 112 are consistent with the radial direction of the bearing shell 11. It should be understood that the first arc-extinguishing groove 111 and/or the second arc-extinguishing groove 112 may also be formed on the upper side of the movable contact conductive member 123.

In other embodiments of the present application, each switch layer 10 further includes a package housing covering the upper portion of the carrying housing 11, at least a portion of the first arc-extinguishing chambers 111 are formed in the package housing, and at least a portion of the second arc-extinguishing chambers 112 are formed in the package housing. In a specific example of the present application, the lower side portion of the carrying case 11 of the switch layer 10 located above in two adjacent layers of switch layers 10 forms an encapsulating case of the switch layer 10 located therebelow. A part of the first arc-extinguishing grooves 111 in the first arc-extinguishing grooves 111 are formed in the bearing housing 11 of the switch layer 10 where the first arc-extinguishing grooves are located, and another part of the first arc-extinguishing grooves 111 in the first arc-extinguishing grooves 111 are formed in the packaging housing, that is, another part of the first arc-extinguishing grooves 111 in the first arc-extinguishing grooves 111 are formed in the bearing housing 11 of the switch layer 10 above the switch layer 10 where the first arc-extinguishing grooves are located. A part of the second arc-extinguishing grooves 112 in the second arc-extinguishing grooves 112 are formed in the bearing housing 11 of the switch layer 10 where the second arc-extinguishing grooves are located, and another part of the second arc-extinguishing grooves 112 in the second arc-extinguishing grooves 112 are formed in the packaging housing, that is, another part of the second arc-extinguishing grooves 112 in the second arc-extinguishing grooves 112 are formed in the bearing housing 11 of the switch layer 10 above the switch layer 10 where the second arc-extinguishing grooves are located. In other specific examples of the present application, the package housings of the respective switching layers 10 may be independent of each other.

It is worth mentioning that in the present embodiment, the second arc extinguishing groove 112 is formed inside the moving path of the moving contact conducting element 123, and is provided in the carrying housing 11 itself, and does not occupy any extra radial space. In this way, the second arc-extinguishing groove 112 is arranged in such a way that the electrical isolation switch can accelerate the arc-extinguishing speed and improve the arc-extinguishing performance without increasing the radial size of the electrical isolation switch.

It is also worth mentioning that the first arc-extinguishing groove 111 and the second arc-extinguishing groove 112 are both formed in the housing structure of the electrical isolation switch, and the electrical isolation switch of the present application can be obtained by structurally modifying the housing of the conventional dc switch.

In order to make the magnetic field generated by the first magnetic element 14 cover the moving path of the moving contact conducting element 123 as much as possible, and thus act on the arc. Preferably, the shape of the first magnetic element 14 is consistent with the moving path of the movable contact conductive element 123. Accordingly, in some embodiments of the present application, the first magnetic element 14 has an arc-shaped structure extending along the moving path of the moving contact conductive element 123, and in a specific example of the present application, the first magnetic element 14 is a sector magnet. In other examples of the present application, the shape of the first magnetic element 14 may be other shapes, such as rectangular, trapezoidal, triangular, arcuate, arch bridge. Of course, it is also possible to increase the number of the first magnetic elements 14 or increase the volume of the first magnetic elements 14 so that the magnetic field generated by the first magnetic elements 14 covers the moving path of the moving contact conducting element 123 as much as possible, thereby acting on the arc. For example, in some embodiments of the present application, the number of the first magnetic elements 14 is 2,3, 4, or more, which is not limited by the present application.

Further, in order to make the arc smoothly enter the arc-extinguishing chamber under the action of the magnetic field, preferably, the extension manner of the first arc-extinguishing chamber 111 and the second arc-extinguishing chamber 112 is consistent with the extension manner of the first magnetic element 14, and specifically, the length extension manner of the first arc-extinguishing chamber 111 and the second arc-extinguishing chamber 112 is consistent with the length extension manner of the first magnetic element 14. Preferably, the first arc-extinguishing chamber 111 and the second arc-extinguishing chamber 112 also have the same extension. In some embodiments of the present application, the first arc chute 111 and the second arc chute 112 each extend in an arc. Of course, the length of the first arc-extinguishing chamber 111 or the second arc-extinguishing chamber 112 may also not be the same as the length of the first magnetic element 14. The first arc-extinguishing chamber 111 and the second arc-extinguishing chamber 112 may also extend in other ways, for example, in a straight line, in an arch bridge shape, for which the application is not limited.

It is worth mentioning that the arc entering the arc chute not only can extend along the length direction of the arc chute, but also can extend along the depth direction of the arc chute, so that the depth of the arc chute can be adjusted to control the space of the length direction occupied by the arc chute.

It is also worth mentioning that the smaller the width dimension of the arc-extinguishing chamber after the arc enters the arc-extinguishing chamber, the thinner the arc is pulled, and the easier it is to extinguish the arc. Accordingly, the arc extinguishing speed can be increased by reducing the width dimension of the space in the arc extinguishing chamber through which the arc is allowed to pass (i.e., the dimension in the radial direction of the carrier housing 11).

Based on this, the inventors of the present application propose that the width dimension of the space in the arc chute through which the arc is allowed to pass can be reduced by means of "static reducing" and/or "dynamic reducing". In particular, "static reducing" means that the arc chute itself has a tapered structure, and "dynamic reducing" means that the width dimension of the space in the arc chute through which the arc is allowed to pass dynamically changes.

Accordingly, in some embodiments of the present application, the switching layer 10 reduces the width dimension of the space in the arc chute through which the arc is allowed to pass by way of "static taper". Specifically, in these embodiments, the first arc-extinguishing groove 111 includes a first groove body portion 1111 and a second groove body portion 1112, the width dimension of the first groove body portion 1111 is different from the width dimension of the second groove body portion 1112, the second arc-extinguishing groove 112 includes a third groove body portion 1121 and a fourth groove body portion 1122, and the width dimension of the third groove body portion 1121 is different from the width dimension of the fourth groove body portion 1122.

More specifically, the first arc chute 111 and/or the second arc chute 112 may form a tapered structure along a depth direction thereof on the one hand, and the first arc chute 111 and/or the second arc chute 112 may form a tapered structure along a length direction thereof on the other hand, so as to rapidly extinguish the arc.

Accordingly, in one specific example of the present application, the first arc-extinguishing groove 111 and the second arc-extinguishing groove 112 form a tapered structure in a depth direction thereof. The second groove body portion 1112 extends from the first groove body portion 1111 in the depth direction of the first arc-extinguishing groove 111, the width dimension of the second groove body portion 1112 is smaller than the width dimension of the first groove body portion 1111, the fourth groove body portion 1122 extends from the third groove body portion 1121 in the depth direction of the second arc-extinguishing groove 112, the width dimension of the fourth groove body portion 1122 is smaller than the width dimension of the third groove body portion 1121, that is, the width dimension of at least a part of the first arc-extinguishing groove 111 is gradually reduced in the depth direction thereof, and the width dimension of the second arc-extinguishing groove 112 is gradually reduced in the depth direction thereof. Thus, the arc is gradually thinned along the depth direction of the first arc-extinguishing groove 111 after entering the first arc-extinguishing groove 111, and the arc is gradually thinned along the depth direction of the second arc-extinguishing groove 112 after entering the second arc-extinguishing groove 112, so that the arc can be extinguished quickly. Accordingly, the first arc-extinguishing chamber 111 has a trapezoidal, or triangular, cross-sectional shape, and the second arc-extinguishing chamber 112 has a trapezoidal, or triangular, cross-sectional shape. The cross-sectional shapes of the first arc-extinguishing chamber 111 and the second arc-extinguishing chamber 112 may also be other shapes, such as a step shape, a half-moon tooth shape, and the like.

It is worth mentioning that when the fixed contact conductive element 13 and the movable contact conductive element 123 are connected or disconnected during the state switching process of the electrical isolation switch, an arc is easily generated between the fixed contact conductive element 13 and the movable contact conductive element 123, and an arc starting zone is formed in a region adjacent to the fixed contact conductive element 13. After the arc is deflected from the arc striking zone adjacent to the stationary conductive element 13 to the first arc chute 111 and/or the second arc chute 112, the arc is stretched in a direction away from the stationary conductive element 13, as shown in figures 15 and 16. Preferably, the width dimensions of the first arc-extinguishing chamber 111 and the second arc-extinguishing chamber 112 decrease gradually in a direction away from the stationary conductive element 13, and the arc will be more easily broken. That is, it is preferable that the width dimension of the portion of the first arc-extinguishing groove 111 and/or the second arc-extinguishing groove 112, which is distant from the stationary contact conductive member 13 adjacent thereto, is smaller than the width dimension of the portion, which is distant from the stationary contact conductive member 13 adjacent thereto, is smaller. That is, the width dimension of the portion of the first arc-extinguishing chamber 111 or the second arc-extinguishing chamber 112, which is closer to the stationary conductive member 13, is larger than the width dimension of the portion of the stationary conductive member 13, which is closer to the stationary conductive member 13, so that the arc generated adjacent to the stationary conductive member 13 more easily enters the first arc-extinguishing chamber 111 and/or the second arc-extinguishing chamber 112.

Accordingly, in this particular example, one of the at least one arc chute, the first arc chute 111 and the second arc chute 112, is adjacent to one of the stationary conductive elements 13 of the pair of stationary conductive elements 13, the second chute portion 1112 is spaced further from one of the stationary conductive elements 13 of the pair of stationary conductive elements 13 (the stationary conductive element 13 adjacent to the first arc chute 111) than the first chute portion 1111 is spaced further from the stationary conductive element 13, and the fourth chute portion 1122 is spaced further from one of the stationary conductive elements 13 of the pair of stationary conductive elements 13 (the stationary conductive element 13 adjacent to the second arc chute 112) than the third chute portion 1121. Specifically, the distance between the second groove portion 1112 and the static conductive element 13 in the depth direction of the first arc-extinguishing groove 111 is larger than the distance between the first groove portion 1111 and the static conductive element 13 in the depth direction of the first arc-extinguishing groove 111. The distance between the third groove portion 1121 and the stationary contact conductive element 13 in the depth direction of the second arc-extinguishing groove 112 is greater than the distance between the fourth groove portion 1122 and the stationary contact conductive element 13 in the depth direction of the second arc-extinguishing groove 112.

In another specific example of the present application, the first arc-extinguishing chamber 111 and the second arc-extinguishing chamber 112 form a tapered structure along the length direction thereof. The second groove portion 1112 extends from the first groove portion 1111 in a length direction of the first arc-extinguishing groove 111, and a width dimension of the second groove portion 1112 is smaller than a width dimension of the first groove portion 1111, as shown in fig. 11A to 14. The fourth groove body portion 1122 extends from the third groove body portion 1121 in the length direction of the second arc extinguishing groove 112, and the width dimension of the fourth groove body portion 1122 is smaller than the width dimension of the third groove body portion 1121, as shown in fig. 11B. Thus, the arc is gradually thinned along the length direction of the first arc chute 111 after entering the first arc chute 111, and the arc is gradually thinned along the length direction of the second arc chute 112 after entering the second arc chute 112, so that the arc can be extinguished quickly.

Further, the distance between the second groove portion 1112 and the static conductive element 13 in the length direction of the first arc-extinguishing groove 111 is greater than the distance between the first groove portion 1111 and the static conductive element 13 in the depth direction of the first arc-extinguishing groove 111, as shown in fig. 11A and 11B, fig. 13. The distance between the third groove portion 1121 and the static contact conductive element 13 in the length direction of the second arc-extinguishing groove 112 is greater than the distance between the fourth groove portion 1122 and the static contact conductive element 13 in the depth direction of the second arc-extinguishing groove 112, as shown in fig. 11B.

In other embodiments of the present application, the switching layer 10 reduces the width dimension of the space in the arc chute through which the arc is allowed to pass by means of "dynamic tapering". In particular, the insulating rotating disc 121 has a predetermined shape configuration such that, during the movement of the movable contact conducting assembly 12 with respect to the pair of stationary conducting elements 13, at least one portion of the insulating rotating disc 121 partially overlaps at least one arc-extinguishing chamber in the axial direction set by the switching layer 10, in such a way as to dynamically vary the width dimension of the space in the arc-extinguishing chamber through which the arc is allowed to pass.

In some embodiments of the present application, during the movement of the movable contact conducting assembly 12 relative to the pair of stationary conducting elements 13, the peripheral portion of the notch structure 1211 of the insulating turntable 121 and/or the outer edge of the insulating turntable 121 protrude into at least one arc chute in the radial direction set by the switch layer 10, so that the width dimension (i.e., radial dimension) of the space in the at least one arc chute through which the arc is allowed to pass is reduced.

Accordingly, in a specific example of the present application, during the movement of the movable contact conductive assembly 12 relative to the pair of stationary contact conductive elements 13, the outer edge of the insulating turntable 121 does not protrude into at least one arc extinguishing groove in the radial direction set by the switch layer 10, and the peripheral portion of the notch structure 1211 of the insulating turntable 121 protrudes into at least one arc extinguishing groove in the radial direction set by the switch layer 10, so that the width dimension (i.e., the radial dimension) of the space allowing the arc to pass through in at least one arc extinguishing groove is reduced, as shown in fig. 18B to 19B. That is, during the movement of the movable contact conductive assembly 12 relative to the pair of stationary conductive elements 13, "dynamic reducing" is mainly achieved by the dynamic change of the positional relationship between the peripheral portion of the notch structure 1211 of the insulating turntable 121 and the arc chute, so that the radial dimension of the space in the arc chute through which the arc is allowed to pass is dynamically changed.

In another specific example of the present application, during the movement of the movable contact conductive assembly 12 relative to the pair of stationary contact conductive elements 13, the peripheral portion of the notch structure 1211 of the insulating turntable 121 does not protrude into at least one arc-extinguishing groove in the radial direction set by the switch layer 10, and the outer edge of the insulating turntable 121 protrudes into at least one arc-extinguishing groove in the radial direction set by the switch layer 10, so that the width dimension (i.e., the radial dimension) of the space in at least one arc-extinguishing groove, through which the arc is allowed to pass, is reduced. Specifically, in this specific example, during the movement of the movable contact conductive assembly 12 relative to the pair of stationary contact conductive elements 13, the outer edge of the insulating turntable 121 protrudes into the first arc-extinguishing chamber 111 in the radial direction set by the switching layer 10, so that the width dimension (i.e., the radial dimension) of the space in the first arc-extinguishing chamber 111 through which the arc is allowed to pass is reduced. That is, during the movement of the movable contact conductive member 12 relative to the pair of stationary conductive members 13, "dynamic diameter change" is mainly achieved by the dynamic change of the positional relationship between the outer edge of the insulating turntable 121 and the arc extinguishing chamber.

In yet another specific example of the present application, during the movement of the movable contact conductive assembly 12 relative to the pair of stationary contact conductive elements 13, the peripheral portion of the notch structure 1211 of the insulating turntable 121 extends into at least one arc-extinguishing groove in the radial direction set by the switching layer 10 and the outer edge of the insulating turntable 121, respectively, so that the width dimension (i.e., radial dimension) of the space in the at least one arc-extinguishing groove for allowing the arc to pass through is reduced. Specifically, in this specific example, during the movement of the movable contact conductive assembly 12 relative to the pair of stationary conductive elements 13, the outer edge of the insulating turntable 121 protrudes into the first arc-extinguishing chamber 111 in the radial direction set by the switching layer 10, so that the width dimension (i.e., radial dimension) of the space in the first arc-extinguishing chamber 111 through which the arc is allowed to pass is reduced, and the peripheral portion of the notch structure 1211 of the insulating turntable 121 protrudes into the second arc-extinguishing chamber 112 in the radial direction set by the switching layer 10, so that the width dimension (i.e., radial dimension) of the space in the second arc-extinguishing chamber 112 through which the arc is allowed to pass is reduced, as shown in fig. 18A. That is, during the movement of the movable contact conductive member 12 relative to the pair of stationary conductive members 13, "dynamic diameter change" is mainly achieved by the dynamic change of the positional relationship between the outer edge of the insulating turntable 121 and the arc extinguishing chamber.

Further, in the embodiment of the present application, the form of the notch structure 1211 of the insulating turntable 121 may be adjusted to realize the "dynamic diameter changing" mode. Specifically, in some embodiments of the present application, the notch structure 1211 extends from the outer edge of the insulating turntable 121 inward along a radial direction set by the switching layer 10, such that the notch structure 1211 forms an inner edge recessed inward with respect to the outer edge of the insulating turntable 121. During the movement of the movable contact conducting assembly 12 relative to the pair of stationary conducting elements 13, the inner edges of the notch structure 1211 project into the at least one arc extinguishing groove in the radial direction set by the switching layer 10, in such a way that the peripheral edge portion of the notch structure 1211 partially overlaps with the at least one arc extinguishing groove in the axial direction set by the switching layer 10, as shown in fig. 9A, 18A and 18B.

In other embodiments of the present application, the notch structure 1211 extends from the outer edge of the insulating turntable 121 radially inward of the setting of the switching layer 10, such that the notch structure 1211 forms an inner edge recessed inward relative to the outer edge of the insulating turntable 121 and an outer edge located outside of the inner edge. During the movement of the movable contact conducting assembly 12 relative to the pair of stationary conductive elements 13, the inner and/or outer edges of the notch structure 1211 project into the at least one arc chute in the radial direction set by the switching layer 10, in such a way that the peripheral edge portion of the notch structure 1211 partially overlaps the at least one arc chute in the axial direction set by the switching layer 10, as shown in fig. 19A and 19B.

Accordingly, in a specific example of the present application, during the movement of the movable contact conductive member 12 relative to the pair of stationary contact conductive elements 13, the inner edge of the notch 1211 extends into at least one arc extinguishing groove in the radial direction set by the switching layer 10. Specifically, in this specific example, during the movement of the movable contact conductive member 12 relative to the pair of stationary contact conductive elements 13, the inner edge of the notch structure 1211 protrudes into the second arc-extinguishing chamber 112 in the radial direction set by the switching layer 10, so that the width dimension (i.e., the radial dimension) of the space in the second arc-extinguishing chamber 112 through which the arc is allowed to pass is reduced, as shown in fig. 19A.

In another specific example of the present application, during the movement of the movable contact conductive assembly 12 relative to the pair of stationary conductive elements 13, the outer edge of the notch 1211 extends into at least one arc extinguishing groove in the radial direction set by the switching layer 10. Specifically, in this specific example, during the movement of the movable contact conductive member 12 relative to the pair of stationary contact conductive elements 13, the outer edge of the notch structure 1211 protrudes into the first arc-extinguishing chamber 111 in the radial direction set by the switching layer 10, so that the width dimension (i.e., the radial dimension) of the space in the first arc-extinguishing chamber 111 through which the arc is allowed to pass is reduced, as shown in fig. 19B.

In yet another specific example of the present application, during the movement of the movable contact conductive assembly 12 relative to the pair of stationary conductive elements 13, the inner edge and the outer edge of the notch structure 1211 respectively extend into at least one arc extinguishing groove in the radial direction set by the switching layer 10. Specifically, in this specific example, during the movement of the movable contact conductive member 12 relative to the pair of stationary contact conductive elements 13, the inner edge of the notch structure 1211 protrudes into the second arc-extinguishing groove 112 in the radial direction set by the switching layer 10, and the outer edge of the notch structure 1211 protrudes into the first arc-extinguishing groove 111 in the radial direction set by the switching layer 10, so that the width dimension (i.e., the radial dimension) of the space allowing the arc to pass through in the first arc-extinguishing groove 111 and the second arc-extinguishing groove 112 is reduced.

Further, in the embodiment of the present application, the manner of "dynamic diameter changing" may be adjusted by adjusting the shape of the peripheral portion of the notch 1211 of the insulating turntable 121 or the outer edge of the insulating turntable 121. In particular, in some embodiments of the present application, the outer edge of the insulating turntable 121 and/or the peripheral portion of the notch structure 1211 extends in a manner that is not consistent with the extension of the arc chute, for example, the arc chute extends in an arc shape, the inner edge and/or the outer edge of the notch structure 1211 extends in a non-arc shape, or at least a portion of the inner edge and/or the outer edge of the notch structure 1211 extends in an arc shape that is not consistent with the arc shape of the arc chute. Thus, the extent to which the inner and/or outer edges of the notch structure 1211 extend into the arc-extinguishing chamber in the radial direction defined by the switching layer 10 varies as the movable contact conductive member 12 moves relative to the pair of stationary conductive elements 13, in such a way that "dynamic tapering" is achieved.

Accordingly, in some embodiments of the present application, the inner and/or outer edges of the peripheral portion of the notch structure 1211 extend in an arc, however, the extent to which the inner and/or outer edges of the peripheral portion of the notch structure 1211 extend into the arc extinguishing groove in the radial direction set by the switch layer 10 varies as the movable contact conductive member 12 moves relative to the pair of stationary conductive elements 13.

In one specific example of the present application, the arc of the inner edge and/or the outer edge of the notch 1211 does not correspond to the arc of at least one of the arc-extinguishing grooves, as shown in fig. 18A. Thus, different portions of the inner and/or outer edges of the notch structure 1211 extend into the arc chute during movement of the movable contact conductive assembly 12 relative to the pair of stationary conductive members 13.

In another specific example of the present application, the peripheral edge portions of the notch structure 1211 include at least one first edge portion 12111 and at least one second edge portion 12112, the second edge portion 12112 protrudes from the first edge portion 12111, and the first edge portion 12111 and the second edge portion 12112 of the notch structure 1211 protrude into the arc-extinguishing chamber in different degrees in the radial direction set by the switch layer 10 during the movement of the movable contact conductive assembly 12 relative to the pair of stationary contact conductive elements 13, as shown in fig. 18A to 19B. The first edge portion 12111 and the second edge portion 12112 may be formed on the inner edge of the notch structure 1211 (as shown in fig. 18A to 19B) or on the outer edge of the notch structure 1211, which is not limited by the present disclosure. The number of the first edge portions 12111 and the second edge portions 12112 is not limited by the present application, and when the inner edge or the outer edge of the notch structure 1211 has a plurality of first edge portions 12111 and second edge portions 12112, the shape of the inner edge or the outer edge of the notch structure 1211 is zigzag, and multiple "dynamic changes" can be realized during the movement of the movable contact conductive member 12 relative to the pair of stationary contact conductive elements 13.

It is worth mentioning that when the arc extinguishing groove and the notch structure 1211 both extend along an arc, the notch structure 1211 is a fan-shaped notch structure 1211. Preferably, the central angle of the sector-shaped notch structure 1211 is smaller than the actuating angle of the switch layer 10, so that the fixed contact conductive element 13 will be accommodated in the insulating plate 121 before the movable contact conductive element 123 and the fixed contact conductive element 13 are engaged next time after the notch structure 1211 is rotated through the arc extinguishing slot during the movement of the movable contact conductive assembly 12 relative to the pair of fixed contact conductive elements 13, thereby preventing the fixed contact conductive element 13 from being damaged by the arc. In a specific example of the present application, a difference between a central angle of the fan shape and the action angle is less than 5% -15% of the action angle. It should be understood that the notch structure 1211 can also be a notch structure with other shapes, such as a rectangle, a trapezoid, a triangle, etc.

In some embodiments of the present application, the inner edge and/or the outer edge of the peripheral portion of the notch structure 1211 extend in a non-arc shape, such as a straight line shape, a slope shape, and the like, so that different portions of the inner edge and/or the outer edge of the notch structure 1211 extend into the arc extinguishing chamber in the radial direction set by the switch layer 10 to different degrees during the movement of the movable contact conductive member 12 relative to the pair of stationary contact conductive members 13, and thus the "dynamic diameter change" can be achieved.

It should be understood that the inner edge and/or the outer edge of the notch 1211 may extend in a manner consistent with the extension of the arc chute in other embodiments of the present application, and is not intended to limit the present application.

Likewise, in some embodiments of the present application, the outer edge of the insulating turntable 121 may also be shaped as an arc with a curvature that is not coincident with the curvature of at least one arc extinguishing groove; alternatively, the outer edge of the insulating turntable 121 may also include at least one first outer edge portion and at least one second outer edge portion protruding relative to at least one first outer edge portion, as shown in fig. 19A and 19B; still alternatively, the outer edge of the insulating turntable 121 may also extend in a non-arc shape, such as a straight line shape, a slope shape, etc., in such a way that "dynamic diameter change" is realized.

In summary, the electrical isolation switch according to the embodiment of the present application is clarified, and the electrical isolation switch guides the arc to deflect according to the preset path through the magnetic field, so that the arc is elongated and thinned through the arc-extinguishing groove arranged on the deflection path of the arc, the arc can be extinguished without greatly increasing the overall size of the dc switch, and the arc-extinguishing speed can be increased.

In the present application, the electrical isolation switch can achieve arc extinguishing under cooperation of the magnetic element and the arc extinguishing groove, and accordingly, according to another aspect of the present application, there is also provided an arc extinguishing method of the electrical isolation switch, which includes: at least one magnetic element is arranged on the moving path of the moving contact conductive element 123 to deflect the electric arc generated during the process that the moving contact conductive element 123 is jointed with or separated from a pair of fixed contact conductive elements 13; and, providing at least one arc chute in a deflected path of the arc.

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

1. An electrical isolation switch, comprising:

at least one switching layer; and

an actuation control element operatively connected to the at least one switching layer, wherein the actuation control element is configured to control the at least one switching layer to switch between a closed state and an open state;

wherein each of the switch layers comprises:

a load bearing housing;

a pair of stationary contact conductive members mounted to said carrier housing and a movable contact conductive assembly including an insulating turntable and a movable contact conductive member mounted to said insulating turntable, said movable contact conductive assembly being rotatable relative to a pair of said stationary contact conductive members such that said movable contact conductive member can be selectively engaged with or disengaged from a pair of said stationary contact conductive members to control switching of said switching layer between said closed state and said open state; and

a first magnetic element which is vertically arranged and corresponds to the moving path of the movable contact conducting element, wherein the first magnetic element is suitable for deflecting an electric arc generated in the process of engaging or disengaging the movable contact conducting element and the static contact conducting element;

the bearing shell is provided with at least one arc extinguishing groove adjacent to the first magnetic element, and the insulating rotary disc is provided with a notch structure; wherein, in the process that the movable contact conductive assembly moves relative to the pair of static conductive elements, the peripheral edge of the notch structure of the insulation turntable extends into the at least one arc extinguishing groove in the radial direction set by the switch layer.

2. The electrical disconnect switch of claim 1, wherein the first magnetic element has opposing first and second magnetic poles, the first magnetic pole facing a path of movement of the movable contact conducting member, the second magnetic pole facing away from the first magnetic pole along an axial direction of the movable contact conducting assembly.

3. The electrical disconnect switch of claim 2, wherein the peripheral edge portion of the notch structure has an inner edge, wherein the inner edge extends into the at least one arc extinguishing groove in a radial direction set by the switch layer during movement of the movable contact conductive assembly relative to the pair of stationary conductive elements.

4. The electrical disconnect switch of claim 2, wherein the peripheral portion of the notch structure has an inner edge and an outer edge opposite the inner edge, the inner and/or outer edges of the peripheral portion of the notch structure extending into the at least one arc extinguishing chamber in a radial direction set by the switch layer during movement of the movable contact conducting assembly relative to the pair of stationary contact conducting members.

5. An electrical disconnector according to claim 2 in which the peripheral edge portion of the gap formation does not extend in the same manner as the at least one arc chute.

6. An electrical disconnector according to claim 5 in which the peripheral edge portion of the notch structure comprises a first edge portion and a second edge portion, the second edge portion projecting beyond the first edge portion.

7. The electrical disconnector according to claim 2, wherein the carrier housing has a first arc-extinguishing groove and a second arc-extinguishing groove formed on a deflection path of the arc, the first arc-extinguishing groove being formed on an outer side of the first magnetic element, the second arc-extinguishing groove being formed on an inner side of the first magnetic element, a peripheral portion of the gap structure of the insulating turntable protruding into the first arc-extinguishing groove and/or the second arc-extinguishing groove in a radial direction set by the switching layer during movement of the movable contact conducting assembly relative to the pair of stationary contact conducting elements.

8. The electrical disconnect switch of claim 7, wherein the peripheral portion of the notch structure has an inner edge that extends into the second arc chute in a radial direction set by the switch layer during movement of the movable contact conductive assembly relative to the pair of stationary contact conductive elements.

9. The electrical disconnect switch of claim 7, wherein the perimeter portion of the notch structure has an inner edge and an outer edge opposite the inner edge, the inner edge of the notch structure perimeter portion extending into the second arc chute in a radial direction set by the switch layer and/or the outer edge of the notch structure perimeter portion extending into the first arc chute in a radial direction set by the switch layer during movement of the movable contact conductive assembly relative to the pair of stationary conductive elements.

10. The electrical disconnect switch of claim 1, wherein the carrier housing has a first arc-extinguishing chamber formed on a deflection path of the arc, the first arc-extinguishing chamber being formed on an outer side of the first magnetic element, an outer edge of the insulating turntable projecting into the first arc-extinguishing chamber in a radial direction set by the switching layer during movement of the movable contact conducting assembly relative to the pair of stationary contact conducting elements.