Arc extinguishing switch device and electrical isolation switch using same

Abstract

The invention relates to the technical field of electric appliance switches, in particular to an arc extinguishing switch device and an electrical isolation switch applying the same. The arc extinguishing switch device comprises a switch assembly and a magnetic assembly. The switch assembly comprises a static contact and a moving contact which are in separable contact, and the moving contact is movably arranged relative to the static contact and is constructed to move along a preset path. The magnetic assembly comprises a plurality of magnetic pole groups which are arranged at intervals along the extension direction of a preset path and at least comprise a first magnetic pole group, a second magnetic pole group and a third magnetic pole group; the first magnetic pole group is arranged corresponding to the static contact, the magnetic pole orientation of the second magnetic pole group is opposite to the magnetic pole orientation of the first magnetic pole group, and the magnetic pole orientation of the third magnetic pole group is opposite to the magnetic pole orientation of the second magnetic pole group. The electrical isolation switch comprises an operation device and the arc extinguishing switch devices, the multiple arc extinguishing switch devices are arranged in a stacked mode, and the operation device is in driving connection with at least one of the multiple arc extinguishing switch devices and used for driving the switch assembly to rotate.

Description

Technical Field

[0001] This application relates to the field of electrical switch technology, and in particular to an arc-extinguishing switch device and an electrical disconnect switch using the same. Background Technology

[0002] Disconnect switches are critical electrical components widely used in power systems. Their primary function is to provide a disconnect point when a circuit needs maintenance or operation, thus isolating the circuit and ensuring the safety of personnel and equipment. In certain applications, such as DC circuits or specific AC circuits, disconnect switches may also need to operate under load. When the moving contact of the switch separates from the stationary contact, an electric arc is generated between the contacts. If the arc is not extinguished promptly and effectively, its continued burning will severely erode the contact surface, leading to increased contact resistance and shortened electrical life of the switch. It may even cause serious safety accidents such as short circuits or fires.

[0003] To address the hazards posed by electric arcs, existing technologies typically incorporate arc-extinguishing devices within switches, such as arc-extinguishing grids or magnetic blowout arc-extinguishing structures. Arc-extinguishing grids increase the total arc voltage by cutting the arc into multiple short segments, thus accelerating its extinction. Magnetic blowout arc-extinguishing structures utilize the magnetic field generated by permanent magnets or electromagnetic coils to drive the arc from the contact gap into the arc-extinguishing chamber via Lorentz force for cooling and elongation. However, these traditional arc-extinguishing methods still have shortcomings in practical applications. In particular, for magnetic blowout structures, the Lorentz force generated is often unidirectional, limiting its driving effect on the arc. It can only blow the arc away from the contacts in a roughly straight line, resulting in low arc elongation efficiency. Consequently, the overall arc-extinguishing speed and capability fail to meet increasingly stringent requirements.

[0004] Furthermore, the rapid development of photovoltaics, energy storage, and new energy vehicles has placed higher demands on the miniaturization, integration, and high power density of electrical components. This has led to extremely compact internal structures in disconnect switches, with strict limitations on the breaking distance (opening gap) between the moving and stationary contacts. In modern high-voltage DC breaking applications, DC arcs, lacking a natural zero-crossing point, exhibit extremely high thermal energy accumulation characteristics in their plasma channels at the moment of breaking. With the need for equipment miniaturization, the internal mechanical opening gap of the switch is severely limited. Traditional unidirectional or single-stage arc-blowing techniques, which stretch the arc through straight or simple curved physical paths, struggle to establish a reverse arc voltage sufficient to overcome the system source voltage within a confined space. Moreover, under conditions of extremely high current breaking, without precise spatial trajectory control mechanisms and pressure relief management, high-temperature plasma is highly susceptible to lateral overflow or bridging caused by pressure pulses, leading to phase-to-phase short circuits or arc extinguishing failure. Summary of the Invention

[0005] To address the problems in the prior art, this application provides an arc-extinguishing switch device and an electrical disconnect switch using the same.

[0006] This application provides an arc-extinguishing switch device, including a switching assembly and a magnetic assembly. The switching assembly includes a separable stationary contact and a moving contact, the moving contact being movably disposed relative to the stationary contact and configured to move along a predetermined path. The magnetic assembly includes a plurality of magnetic pole groups spaced apart along the extension direction of the predetermined path, including at least a first magnetic pole group, a second magnetic pole group, and a third magnetic pole group; the first magnetic pole group is disposed corresponding to the stationary contact, the magnetic pole orientation of the second magnetic pole group is opposite to that of the first magnetic pole group, and the magnetic pole orientation of the third magnetic pole group is opposite to that of the second magnetic pole group.

[0007] Understandably, since the direction of the Lorentz force exerted by the magnetic field on the electric arc depends on the direction of the magnetic field and the direction of the current, this application sets at least three magnetic pole groups with sequentially opposite polarities (e.g., NSN or SNS) along the moving contact's movement path. This causes the magnetic field environment of the arc to reverse multiple times as the moving contact elongates, thereby changing the direction of the Lorentz force acting on the arc. This forces the arc's trajectory to change from a traditional straight line or simple curve to a multi-segment wavy or S-shaped trajectory. The folding of the arc trajectory significantly increases the actual path length of the arc within a limited contact gap, thereby increasing the arc voltage and facilitating the rapid extinguishing of the arc.

[0008] In one embodiment, each magnetic pole group includes multiple magnetic elements, and the magnetic poles of the multiple magnetic elements in each magnetic pole group are oriented in the same direction.

[0009] Understandably, by using multiple magnetic elements to form a magnetic pole group, it is possible to adapt to irregular installation spaces inside the switch through a dispersed arrangement. Furthermore, the combination of multiple magnetic elements of the same polarity (e.g., arranged on multiple sides around the stationary contact) can create an enveloping magnetic field distribution within the space corresponding to the magnetic pole group. This multi-point array distribution increases the coverage area of ​​the magnetic field, reduces the magnetic blind zone, and allows the arc to obtain a relatively uniform magnetic blowing force drive at different positions within the control area of ​​the magnetic pole group.

[0010] In one embodiment, the first magnetic pole group includes a first sub-magnetic part, a second sub-magnetic part, and a third sub-magnetic part. The first sub-magnetic part is stacked with the contact areas of the stationary contact and the moving contact. The first sub-magnetic part is located between the second and third sub-magnetic parts along a predetermined path. The second sub-magnetic part is located on the side of the third sub-magnetic part away from the second magnetic pole group along the predetermined path. The magnetic flux of the third sub-magnetic part is greater than the magnetic flux of the second sub-magnetic part.

[0011] Understandably, the first, second, and third sub-magnetic sections are positioned to cover the back, upper, and lower regions of the stationary contact, forming a spatial enclosure around the arc-initiating area. Since the moving contact separates from the stationary contact in the direction of the third sub-magnetic section (i.e., away from the second sub-magnetic section), the main extension and development area of ​​the arc is located near the third sub-magnetic section. Therefore, configuring the third sub-magnetic section with a greater magnetic flux than the second sub-magnetic section allows for a stronger Lorentz force along the critical path of arc development (i.e., on the third sub-magnetic section side). This helps overcome the sticky effect at the arc root in the early stages of arc initiation through a stronger magnetic field, promoting rapid arc detachment from the contact surface.

[0012] In one embodiment, a first sub-magnetic section, a second sub-magnetic section, and a third sub-magnetic section are spaced apart, and a first arc-extinguishing groove is constructed between the second sub-magnetic section and the third sub-magnetic section for deflecting the arc generated when the moving contact separates from the stationary contact.

[0013] Understandably, the physical separation between the first, second, and third sub-magnetic sections forms the first arc-extinguishing groove. This first arc-extinguishing groove spatially constitutes a channel connecting to the outside world. When the arc is driven by the Lorentz force generated by the first magnetic pole group, this groove provides a low-resistance release path for the arc, guiding it to diffuse and elongate outwards along the groove, preventing the arc from accumulating in the enclosed space and causing localized overheating or excessive pressure.

[0014] In one embodiment, the second magnetic pole group includes a fourth sub-magnetic part and a fifth sub-magnetic part, the fifth sub-magnetic part being closer to the predetermined path of the moving contact than the fourth sub-magnetic part, and the fifth sub-magnetic part being deflected relative to the fourth sub-magnetic part toward the side where the predetermined path is located; the third magnetic pole group includes a sixth sub-magnetic part and a seventh sub-magnetic part, the seventh sub-magnetic part being closer to the predetermined path of the moving contact than the sixth sub-magnetic part, and the seventh sub-magnetic part being deflected relative to the sixth sub-magnetic part toward the side where the predetermined path is located; the deflection angle of the seventh sub-magnetic part relative to the sixth sub-magnetic part is greater than the deflection angle of the fifth sub-magnetic part relative to the fourth sub-magnetic part.

[0015] Understandably, the deflection settings of the fifth and seventh sub-magnetic sections change the direction of the magnetic field lines. At the end of the arc motion, the guiding effect of the magnetic field on the arc is further enhanced, causing the arc to deflect or converge at a specific angle, thus more accurately entering the subsequent arc-extinguishing structure (such as the arc-extinguishing grid) and reducing the possibility of arc dissipation.

[0016] In one embodiment, a second arc-extinguishing groove is constructed between the second magnetic pole group and the first magnetic pole group for deflecting the arc generated when the moving contact separates from the stationary contact; a third arc-extinguishing groove is constructed between the third magnetic pole group and the second magnetic pole group for deflecting the arc generated when the moving contact separates from the stationary contact; the second arc-extinguishing groove and the third arc-extinguishing groove are connected.

[0017] Understandably, the second and third arc-extinguishing grooves are positioned between adjacent magnetic pole groups, specifically in the transition regions where magnetic field polarity reverses. In these regions, the Lorentz force direction changes abruptly, causing the arc to bend dramatically. The interconnected second and third arc-extinguishing grooves provide continuous extension space for this bent arc, allowing for a smooth spatial connection between different polarity magnetic field control regions, maintaining the continuity of the arc's S-shaped trajectory.

[0018] In one embodiment, each magnetic pole group includes at least one pair of stacked magnetic elements located on the side of the magnetic pole group away from the predetermined path.

[0019] Understandably, stacking the magnetic poles on the side furthest from the predetermined path (i.e., the radially outer side) increases the volume of magnetic material and magnetic flux density at that location. This results in a non-uniform magnetic field distribution in the radial direction, with a relatively weaker magnetic field on the inner side (single layer or fewer layers) and a relatively stronger magnetic field on the outer side (stacked layers). This gradient difference in magnetic field strength generates a magnetic pressure difference pointing towards the strong magnetic field region (i.e., the outer side). In addition to the Lorentz force, this magnetic pressure difference provides an extra driving force, helping to draw the arc from the contact area or push it towards the outer arc-extinguishing region, maintaining the continuity of the arc's S-shaped trajectory.

[0020] In one embodiment, the moving contact is configured to rotate, and the magnetization direction of each magnetic pole group is perpendicular to the plane of rotation of the moving contact.

[0021] Understandably, when the magnetization direction is perpendicular to the plane of rotation of the moving contact (i.e., the arc stretching plane), according to the left-hand rule, the arc current is orthogonal to the magnetic field. The resulting Lorentz force lies within the plane of rotation and is perpendicular to the current direction. This magnetization direction ensures that the magnetic force can be converted into the driving force propelling the arc radially outward with maximum efficiency, reducing ineffective force components and improving magnetic energy utilization.

[0022] In one embodiment, the arc-extinguishing switch device further includes a housing assembly, which includes a first shell layer and a second shell layer stacked in a direction perpendicular to the rotation plane of the moving contact. A magnetic component is disposed in the first shell layer, and the second shell layer includes a plurality of grid plates extending in a direction perpendicular to the rotation plane of the moving contact. Each magnetic pole group is provided with at least one grid plate, and the plurality of grid plates are spaced apart along the extension direction of a predetermined path to form arc-extinguishing grooves for deflecting the arc generated when the moving contact separates from the stationary contact.

[0023] Understandably, the first shell is equipped with magnetic components, and the second shell is equipped with grids. The two have a stacked structure in space. When the magnetic components drive the arc to bend in an S-shape, the arc segments at different positions can enter their corresponding arc-extinguishing grooves to maintain the continuity of the arc's S-shaped trajectory.

[0024] In one embodiment, the switch assembly includes two stationary contacts and two moving contacts. The switch assembly also includes a rotatably disposed moving contact disk. The two moving contacts are fixedly connected to the moving contact disk and are rotationally symmetrical about the rotation axis of the moving contact disk. The two stationary contacts are fixedly disposed and rotationally symmetrical about the rotation axis of the moving contact disk. The arc-extinguishing switch device includes two sets of magnetic components rotationally symmetrical about the rotation axis of the moving contact disk, each set of magnetic components corresponding to one stationary contact.

[0025] Understandably, adopting a rotationally symmetrical double-break structure distributes the circuit breaking task to two series-connected breaks, improving the spatial arrangement efficiency of the structure. At the same time, the two sets of symmetrical magnetic components can generate a symmetrical magnetic field distribution, making the electrodynamic and mechanical reaction forces on the moving contact plate tend to be balanced during rotation, reducing the lateral forces on the rotating shaft, and helping to maintain the smoothness of the switch operating mechanism.

[0026] This application also provides an electrical disconnect switch, including an operating device and an arc-extinguishing switch device as described in any of the above embodiments. Multiple arc-extinguishing switch devices are stacked, and the operating device is drivenly connected to at least one of the multiple arc-extinguishing switch devices to drive the switch assembly to rotate.

[0027] The stacked arrangement of multiple arc-extinguishing switch devices can be understood to be driven by the operating device. Since each arc-extinguishing switch device has the aforementioned S-type magnetic blowout arc-extinguishing characteristics, the combined electrical disconnect switch has high breaking reliability under high voltage and high current conditions. At the same time, the stacked structure maintains the compactness of the overall structure while meeting the multi-pole switching requirements.

[0028] The arc-extinguishing switch device provided in this application achieves breakthroughs at multiple physical levels through a multi-level alternating magnetic field constructed by a multi-level reversing magnetic pole group. First, by utilizing three or more magnetic field reversal zones to drive multiple jumps in the direction of the Lorentz force, the arc is forced to transform from a traditional arc shape into an "S-shaped" geometrically folded shape with multiple peaks and troughs. This achieves effective physical path growth of the arc under the same physical opening distance, significantly improving arc resistance and back electromotive force. Second, by differentiating the magnetic flux of the third and second sub-magnetic parts in the arc-initiation sensitive area, a magnetic pressure gradient pointing deep into the arc-extinguishing chamber is established during separation, allowing the arc root to quickly detach from the contact surface. Third, the non-uniform magnetic field gradient generated by the radial stacking of outer magnetic elements establishes a magnetic pressure difference pointing towards the arc-extinguishing grid region, ensuring that even when interrupting small currents, rarefied plasma can be reliably migrated to the grid region. Attached Figure Description

[0029] Figure 1 This is a three-dimensional schematic diagram of the electrical disconnect switch provided in the embodiments of this application.

[0030] Figure 2 This is an exploded perspective view of the arc-extinguishing switch device provided in the embodiments of this application.

[0031] Figure 3 This is a partial perspective view of the arc-extinguishing switch device provided in the embodiments of this application.

[0032] Figure 4 This is a partial perspective view of the arc-extinguishing switch device provided in the embodiments of this application.

[0033] Figure 5 This is a partial plan view of the arc-extinguishing switch device provided in the embodiments of this application.

[0034] Figure 6 This is a schematic diagram of the magnetic component and the switching component of the arc extinguishing switch device provided in the embodiments of this application.

[0035] Figure 7 This is a schematic diagram showing the distribution of the magnetic components of the arc-extinguishing switch device provided in the embodiments of this application.

[0036] Figure 8 This is a schematic diagram of the Lorentz force distribution and arc theoretical trajectory of the magnetic component of the arc-extinguishing switch device provided in the embodiments of this application.

[0037] Explanation of reference numerals in the attached drawings: 20, Electrically disconnecting switch; 21, Operating device; 10, Arc extinguishing switch device; 11, Switch assembly; 12, Magnetic assembly; 13, Housing assembly; 111, Stationary contact; 112, Moving contact; 113, Moving contact plate; 114, Rotating component; 120, Magnetic pole group; 129, Magnetic element; 121, First magnetic pole group; 122, Second magnetic pole group; 123, Third magnetic pole group; 1201, First sub-magnetic section; 1202, Second sub-magnetic section; 1203, Third sub-magnetic section; 1 204. Fourth sub-magnetic section; 1205. Fifth sub-magnetic section; 1206. Sixth sub-magnetic section; 1207. Seventh sub-magnetic section; 128. Auxiliary magnetic component; 131. First shell layer; 132. Second shell layer; 133. Cover plate; 134. Arc extinguishing chamber; 135. Mounting groove; 136. Grid plate; 1361. First grid plate group; 1362. Second grid plate group; 1363. Third grid plate group; 1301. First arc extinguishing groove; 1302. Second arc extinguishing groove; 1303. Third arc extinguishing groove. Detailed Implementation

[0038] The following is in conjunction with the appendix Figures 1 to 8 This application will be described in further detail below.

[0039] The current demand for miniaturization, integration, and high power density in electrical components has led to extremely compact internal structures in disconnect switches, severely limiting the breaking distance (opening gap) between the moving and stationary contacts. Within this limited opening gap, it is difficult to extend the arc sufficiently to the critical length and voltage required for its self-extinguishing using traditional methods.

[0040] This application provides an arc-extinguishing switch device and an electrical disconnecting switch using the same. The arc-extinguishing switch device includes a switching assembly and a magnetic assembly. The switching assembly includes a separable stationary contact and a moving contact, the moving contact being movably disposed relative to the stationary contact and configured to move along a predetermined path. The magnetic assembly includes multiple magnetic pole groups spaced apart along the predetermined path, namely a first magnetic pole group, a second magnetic pole group, and a third magnetic pole group. The first magnetic pole group is disposed corresponding to the stationary contact, the magnetic pole orientation of the second magnetic pole group is opposite to that of the first magnetic pole group, and the magnetic pole orientation of the third magnetic pole group is opposite to that of the second magnetic pole group. The electrical disconnecting switch includes an operating device and the arc-extinguishing switch device, with multiple arc-extinguishing switch devices stacked on top of each other. The operating device is drivenly connected to at least one of the multiple arc-extinguishing switch devices to drive the switching assembly to rotate.

[0041] The arc-extinguishing switch and electrical disconnect switch provided in this application utilize a specific magnetic element setting method to generate a specific magnetic field, and based on the specific magnetic field, generate a force in a specific direction on the electric arc, causing the electric arc to deflect in a specific way, guiding the electric arc to bend multiple times in a relatively small space, and lengthening the electric arc by deflecting it in multiple different ways, thereby accelerating the breaking and extinguishing of the electric arc.

[0042] The technical solutions in the embodiments of this application will be further described in detail below with reference to the accompanying drawings. The described embodiments are only possible technical implementations of this application, but are not limited thereto. Other embodiments obtained by those skilled in the art in conjunction with the embodiments of this application without creative effort are also within the protection scope of this application.

[0043] like Figures 1 to 5 As shown, this application provides an arc-extinguishing switch device 10 and an electrical disconnect switch 20 using the same.

[0044] In one embodiment, the arc-extinguishing switch device 10 includes a switch assembly 11 and a magnetic assembly 12; the switch assembly 11 includes a separable stationary contact 111 and a moving contact 112, the moving contact 112 being movably disposed relative to the stationary contact 111 and configured to move along a predetermined path; the magnetic assembly 12 includes a plurality of magnetic pole groups 120 disposed at intervals along the predetermined path, namely a first magnetic pole group 121, a second magnetic pole group 122 and a third magnetic pole group 123; the first magnetic pole group 121 is disposed corresponding to the stationary contact 111, the magnetic pole orientation of the second magnetic pole group 122 is opposite to the magnetic pole orientation of the first magnetic pole group 121, and the magnetic pole orientation of the third magnetic pole group 123 is opposite to the magnetic pole orientation of the second magnetic pole group 122.

[0045] In one embodiment, the electrical disconnect switch 20 includes an operating device 21 and a plurality of arc-extinguishing switch devices 10. The plurality of arc-extinguishing switch devices 10 are stacked, and the operating device 21 is drivenly connected to at least one of the plurality of arc-extinguishing switch devices 10 for driving the switch assembly 11 to rotate.

[0046] The moving contact 112 is adapted to be moved to engage or disengage with the stationary contact 111. The operating device 21 can control the closed and open states of the switch assembly 11 by controlling the movement of the moving contact 112 relative to the stationary contact 111. When the switch assembly 11 is in the closed state, the moving contact 112 is in contact with the stationary contact 111; when the switch assembly 11 is in the open state, the moving contact 112 is separated from the stationary contact 111. Specifically, the moving contact 112 is driven to the operating device 21 via a rotating member 114. The moving contact 112 rotates with the operating device 21, thereby moving relative to the stationary contact 111, realizing the state switching of the switch assembly 11.

[0047] During the state switching process of the switch assembly 11, an electric arc is generated. Accordingly, in this embodiment, the switch assembly 11 is configured with a magnetic assembly 12 including multiple magnetic pole groups 120 arranged at intervals along a predetermined path, so as to extinguish the arc by using the arc extinguishing scheme of magnets, and to try to improve the space utilization and arc extinguishing performance of the electrical disconnect switch 20 by using the principle that the curve path is longer than the straight path.

[0048] In this embodiment, multiple arc-extinguishing switch devices 10 are stacked, and the operating device 21 is driven and connected to multiple switch components 11 in the multiple arc-extinguishing switch devices 10, for driving the multiple switch components 11 to rotate synchronously.

[0049] Understandably, the stacked arrangement of multiple arc-extinguishing switch devices 10, combined with the synchronous drive of the operating device 21, enables simultaneous disconnection control of multi-pole switches. Each arc-extinguishing switch device 10 possesses magnetic blowout arc-extinguishing characteristics, and the combined electrical disconnect switch 20 exhibits high disconnection reliability under high voltage and high current conditions. At the same time, the stacked structure maintains the compactness of the overall structure while meeting the requirements for multi-pole switching.

[0050] In this embodiment, multiple arc-extinguishing switch devices 10 are connected in series via a long shaft or linkage mechanism to form a multi-pole switch structure. The predetermined path of the moving contact 112 is an arc path centered on the rotation center of the moving contact 112. The first magnetic pole group 121, the second magnetic pole group 122, and the third magnetic pole group 123 are arranged sequentially along the periphery of this arc path. Specifically, the first magnetic pole group 121 is installed adjacent to the stationary contact 111 and serves as the magnetic field source for the arc-initiating zone; the second magnetic pole group 122 is located in the middle section of the travel of the moving contact 112; and the third magnetic pole group 123 is located at the end or extension of the travel of the moving contact 112. In other embodiments, the number of magnetic pole groups 120 is not limited to three groups, and more groups can be set according to the travel length of the moving contact 112 and the arc-extinguishing requirements, which will not be elaborated further.

[0051] Understandably, since the direction of the Lorentz force exerted by the magnetic field on the electric arc depends on the direction of the magnetic field and the direction of the current, this application sets three magnetic pole groups 120 with sequentially opposite polarities along the movement path of the moving contact 112. This causes the magnetic field environment of the arc to reverse multiple times as the moving contact 112 elongates, thereby changing the direction of the Lorentz force acting on the arc. This forces the arc's trajectory to change from a traditional straight line or simple curve to a multi-segment wavy or S-shaped trajectory. The folding of the arc trajectory significantly increases the actual path length of the arc within a limited contact gap, thereby increasing the arc voltage and facilitating the rapid extinguishing of the arc.

[0052] In this embodiment, the stationary contact 111 may include a conductive portion made of a single metal plate, and the moving contact 112 may include a conductive portion made of two stacked metal plates. When the stationary contact 111 contacts the moving contact 112, the single metal plate of the stationary contact 111 sandwiches the conductive portion between the stacked conductive portions of the moving contact 112.

[0053] In one embodiment, the switch assembly 11 includes two stationary contacts 111 and two moving contacts 112, and further includes a rotatably disposed moving contact disk 113. The two moving contacts 112 are fixedly connected to the moving contact disk 113 and are arranged rotationally symmetrically about the rotation axis of the moving contact disk 113. The two stationary contacts 111 are fixedly disposed and arranged rotationally symmetrically relative to the rotation axis of the moving contact disk 113. The arc-extinguishing switch device 10 includes two sets of magnetic components 12 arranged rotationally symmetrically relative to the rotation axis of the moving contact disk 113, each set of magnetic components 12 corresponding to one stationary contact 111.

[0054] In this embodiment, the moving contact plate 113, acting as a rotor, is positioned approximately in the middle of the arc-extinguishing switch device 10, with two moving contacts 112 located at opposite ends of the moving contact plate 113. Correspondingly, two sets of magnetic components 12 are arranged on both sides of the housing, each side's magnetic component 12 comprising a first magnetic pole group 121, a second magnetic pole group 122, and a third magnetic pole group 123, thus forming a double-break rotary isolating switch. When the moving contact plate 113 rotates, both breaks open simultaneously, and an arc is generated on both sides simultaneously and driven by their respective magnetic components 12.

[0055] Understandably, adopting a rotationally symmetrical double-break structure distributes the circuit breaking task to two series-connected breaks, improving the spatial arrangement efficiency of the structure. At the same time, the two sets of symmetrical magnetic components 12 can generate a symmetrical magnetic field distribution, so that the electrodynamic force and mechanical reaction force on the moving contact plate 113 tend to be balanced during rotation, reducing the lateral force on the rotating shaft and helping to maintain the smoothness of the switch operating mechanism.

[0056] In one embodiment, the moving contact 112 is configured to rotate, and the magnetization direction of each magnetic pole group 120 is perpendicular to the rotation plane of the moving contact 112.

[0057] In this embodiment, all magnetic elements 129 are axially magnetized (i.e., magnetized along the rotation axis) to ensure that the magnetic field lines pass perpendicularly through the plane swept by the moving contact 112.

[0058] Understandably, when the magnetization direction is perpendicular to the rotation plane of the moving contact 112 (i.e., the arc stretching plane), according to the left-hand rule, the arc current is orthogonal to the magnetic field. The resulting Lorentz force lies within the rotation plane and is perpendicular to the current direction. This magnetization direction ensures that the magnetic force can be converted into the driving force propelling the arc radially outward with maximum efficiency, reducing ineffective force components and improving magnetic energy utilization.

[0059] In one embodiment, the arc-extinguishing switch device 10 further includes a housing assembly 13, which includes a first shell layer 131 and a second shell layer 132 stacked in a direction perpendicular to the rotation plane of the moving contact 112. A magnetic component 12 is disposed in the first shell layer 131, and the second shell layer 132 includes a plurality of grid plates 136 extending in a direction perpendicular to the rotation plane of the moving contact 112. Each magnetic pole group 120 is provided with at least one grid plate 136. The plurality of grid plates 136 are spaced apart along the extension direction of a predetermined path to form arc-extinguishing grooves for deflecting the arc generated when the moving contact 112 separates from the stationary contact 111.

[0060] In this embodiment, the first shell layer 131 can be regarded as an intermediate shell layer. The first shell layer 131 has a plurality of mounting slots 135 for accommodating a plurality of magnetic pole groups 120. In addition, the shell assembly 13 also includes a cover plate 133, which is detachably connected to the first shell layer 131 for mounting the plurality of magnetic pole groups 120.

[0061] Understandably, the shape of the mounting groove 135 on the first shell 131 and the shape of the cover plate 133 are set according to the arrangement of the multiple magnetic pole groups 120 to achieve the positioning of the multiple magnetic pole groups 120. The specific shape details are not described in detail.

[0062] In this embodiment, the second shell 132 can be considered as an upper shell or a lower shell. The stationary contact 111 is fixed by being clamped by the first shell 131 and the second shell 132. A plastic arc-extinguishing grid 136 is mounted on or integrally formed on the second shell 132, and the gap between the first shell 131 and the second shell 132 corresponds to the arc-extinguishing chamber 134. The position of the grid 136 corresponds one-to-one with the magnetic pole group 120 in the first shell 131 and extends along the arrangement direction of the corresponding magnetic pole group 120.

[0063] Specifically, a first grid plate group 1361 is provided corresponding to the first magnetic pole group 121, a second grid plate group 1362 is provided corresponding to the second magnetic pole group 122, and a third grid plate group 1363 is provided corresponding to the third magnetic pole group 123. The first grid plate group 1361, the second grid plate group 1362, and the third grid plate group 1363 are spaced apart along a predetermined path direction for the rotation of the moving contact 112. A first arc-extinguishing groove 1301 is formed in the first grid plate group 1361, a second arc-extinguishing groove 1302 is formed between the first grid plate group 1361 and the second grid plate group 1362, and a third arc-extinguishing groove 1303 is formed between the second grid plate group 1362 and the third grid plate group 1363. The first arc-extinguishing groove 1301, the second arc-extinguishing groove 1302 and the third arc-extinguishing groove 1303 are connected in sequence to ensure that the arc bending in an S-shape under the action of the magnetic field can be cut into the corresponding grid plate 136 group by each bending segment separately and simultaneously.

[0064] Understandably, the first shell 131 is equipped with a magnetic component 12, and the second shell 132 is equipped with a grid plate 136, with the two having a spatially stacked structure. When the magnetic component 12 drives the arc to an S-shaped bend, arc segments at different positions can enter their corresponding arc-extinguishing grooves, maintaining the continuity of the arc's S-shaped trajectory. This segmented entry into the grid plate 136 allows the long arc to be simultaneously cut and cooled, improving overall heat dissipation and deionization efficiency.

[0065] In this embodiment, a second shell 132 is provided on each side of a first shell 131, forming two arc-extinguishing chambers 134. Each arc-extinguishing chamber 134 contains a corresponding switch assembly 11. A set of magnetic components 12 fixed to the first shell 131 can simultaneously extinguish the arc of the two switch assemblies 11. Correspondingly, the magnetic component 12 may also include an auxiliary magnetic element 128, which can be a magnetic element identical to the single magnetic element 129. The auxiliary magnetic element 128 is disposed on the second shell 132 and is located at the bottom of the stationary contact 111, corresponding to the first sub-magnetic part 1201 in the first magnetic pole group 121. The two correspond to the two stationary contacts 111 respectively. The magnetic flux direction of the auxiliary magnetic element 128 can be the same as the magnetic flux direction of the other magnetic elements 129, both perpendicularly passing through the plane swept by the moving contact 112.

[0066] Further integration Figures 6 to 8 As shown, multiple magnetic pole groups 120 are illustrated. Among them, Figure 8 The arrow pointing to the multiple magnetic elements 129 is a schematic diagram of the Lorentz force trend. Figure 8 The roughly S-shaped dashed lines represent the extended trajectory of the electric arc under the influence of the Lorentz force; those skilled in the art will understand this. Figure 8 The arrows in the diagram illustrate the trend of the Lorentz force, but do not imply that the Lorentz force must be arranged exactly according to this trend. Similarly, Figure 8 The dashed "S" shape in the diagram represents the trajectory of an electric arc after being subjected to the Lorentz force. It does not imply that the direction or manner of the arc's extension must be as shown by the dashed "S" shape.

[0067] In one embodiment, each magnetic pole group 120 includes a plurality of magnetic elements 129, and the magnetic poles of the plurality of magnetic elements 129 in each magnetic pole group 120 are oriented in the same direction.

[0068] Understandably, by using multiple magnetic elements 129 to form a magnetic pole group 120, the combination of multiple magnetic elements 129 with the same polarity can form an enveloping magnetic field distribution within the spatial range corresponding to the magnetic pole group 120. This increases the effective coverage area of ​​the magnetic field, reduces the magnetic field blind zone, and allows the electric arc to obtain a relatively uniform and strong magnetic blowing force drive at different positions within the control area of ​​the magnetic pole group 120.

[0069] In this embodiment, the magnetic element 129 is a square permanent magnet block. In the first magnetic pole group 121, the second magnetic pole group 122, and the third magnetic pole group 123, instead of a single, monolithic magnet, multiple independent permanent magnet blocks are assembled or arranged adjacently. These magnetic elements 129 are discretized according to the internal housing space structure of the switch. For example, around the stationary contact 111, multiple magnetic elements 129 are arranged in different positions such as the back and sides of the stationary contact 111, but their polarity towards the arc channel remains consistent. In a specific preferred embodiment, to achieve optimal magnetic field coverage and arc extinguishing balance, the number of magnetic elements 129 disposed on the first shell layer 131 can be set to twenty-eight, and they are symmetrically arranged in two magnetic assemblies 12. Each magnetic assembly 12 includes fourteen magnetic elements 129, and the fourteen magnetic elements 129 in each magnetic assembly 12 are correspondingly divided into multiple magnetic pole groups 120.

[0070] It should be noted that different magnetic flux requirements in different regions can be met by setting different magnetic field strengths or different numbers of magnetic components 12. In the following embodiments, we will take the example of multiple magnetic elements 129 having the same magnetic force (same label and / or size) and adjusting the magnetic flux by setting different numbers of magnetic elements 129.

[0071] Other, Figures 6 to 7 The example shown uses the first magnetic pole group 121 and the third magnetic pole group 123 with the "N" pole facing upward and the "S" pole facing downward, and the second magnetic pole group 122 with the "N" pole facing downward and the "S" pole facing upward. In other embodiments, other magnetic pole arrangements that meet the requirements can also be used, such as the first magnetic pole group 121 and the third magnetic pole group 123 with the "N" pole facing downward and the "S" pole facing upward, and the second magnetic pole group 122 with the "N" pole facing upward and the "S" pole facing downward, which will not be elaborated here.

[0072] In one embodiment, the first magnetic pole group 121 includes a first sub-magnetic part 1201, a second sub-magnetic part 1202, and a third sub-magnetic part 1203. The first sub-magnetic part 1201 is stacked with the contact areas of the stationary contact 111 and the moving contact 112. The first sub-magnetic part 1201 is located between the second sub-magnetic part 1202 and the third sub-magnetic part 1203 along a predetermined path. The second sub-magnetic part 1202 is located on the side of the third sub-magnetic part 1203 away from the second magnetic pole group 122 along the predetermined path. The magnetic flux of the third sub-magnetic part 1203 is greater than the magnetic flux of the second sub-magnetic part 1202.

[0073] In this embodiment, the first sub-magnetic part 1201 is located on the back of the stationary contact 111, the second sub-magnetic part 1202 is located on the top of the stationary contact 111 (i.e., in the opposite direction to the starting movement of the moving contact 112), and the third sub-magnetic part 1203 is located on the lower part or front side of the stationary contact 111 (i.e., on one side of the movement direction of the moving contact 112). The third sub-magnetic part 1203 employs magnetic elements 129 that are larger in volume or more numerous than those in the second sub-magnetic part 1202.

[0074] Specifically, the first sub-magnetic section 1201 includes a magnetic element 129, the second sub-magnetic section 1202 includes two magnetic elements 129 stacked along the magnetic flux direction, and the third sub-magnetic section 1203 includes three magnetic elements 129, wherein two magnetic elements 129 are stacked along the magnetic flux direction, and the other magnetic element 129 is closer to the switch assembly 11 than the two stacked magnetic elements 129 and is arranged approximately side by side with the two stacked magnetic elements 129. Furthermore, all magnetic elements 129 in the first magnetic pole group 121 have the same magnetic pole orientation. Although the first sub-magnetic part 1201, the second sub-magnetic part 1202, and the third sub-magnetic part 1203 are arranged at intervals, their magnetic pole orientations are constructed to be the same to form a magnetic area that can surround the arc-starting area. This provides a relatively strong and stable initial thrust to the arc, ensuring that the arc can quickly detach from the contact surface and be pushed away from the contact. This allows it to work in conjunction with the second magnetic pole group 122 and the third magnetic pole group 123 to lengthen the arc as much as possible, preventing the arc from simply bending slightly along the predetermined path of the moving contact 112.

[0075] Understandably, the positions of the first sub-magnetic section 1201, the second sub-magnetic section 1202, and the third sub-magnetic section 1203 cover the back, upper, and lower regions of the stationary contact 111, forming a spatial enclosure of the arc-initiating region. Since the moving contact 112 moves towards the direction of the third sub-magnetic section 1203 (i.e., away from the second sub-magnetic section 1202) when separating from the stationary contact 111, the main extension and development area of ​​the arc is located near the third sub-magnetic section 1203. Therefore, configuring the magnetic flux of the third sub-magnetic section 1203 to be greater than that of the second sub-magnetic section 1202 allows for a stronger Lorentz force along the critical path of arc development (i.e., on the side of the third sub-magnetic section 1203). This helps overcome the stickiness effect at the arc root through a stronger magnetic field in the early stages of arc initiation, promoting the rapid departure of the arc from the contact surface.

[0076] In one embodiment, a first sub-magnetic part 1201, a second sub-magnetic part 1202 and a third sub-magnetic part 1203 are arranged at intervals, and a first arc-extinguishing groove 1301 is constructed between the second sub-magnetic part 1202 and the third sub-magnetic part 1203 for deflecting the arc generated when the moving contact 112 separates from the stationary contact 111.

[0077] In this embodiment, the first sub-magnetic part 1201 is not tightly fitted with the second sub-magnetic part 1202 and the third sub-magnetic part 1203, but a gap is left. In particular, a physical groove channel is formed between the second sub-magnetic part 1202 and the third sub-magnetic part 1203, which is the first arc-extinguishing groove 1301.

[0078] Understandably, the physical spacing between the first sub-magnetic section 1201, the second sub-magnetic section 1202, and the third sub-magnetic section 1203 forms the first arc-extinguishing groove 1301. The first arc-extinguishing groove 1301 spatially constitutes a channel connecting to the outside world. When the electric arc is driven by the Lorentz force generated by the first magnetic pole group 121, the groove provides a low-resistance release path for the arc, guiding it to diffuse and elongate outward along the groove, preventing the arc from accumulating in the enclosed space and causing localized overheating or excessive pressure.

[0079] In one embodiment, the second magnetic pole group 122 includes a fourth sub-magnetic part 1204 and a fifth sub-magnetic part 1205. The fifth sub-magnetic part 1205 is closer to the predetermined path of the moving contact 112 than the fourth sub-magnetic part 1204. The fifth sub-magnetic part 1205 is deflected relative to the fourth sub-magnetic part 1204 toward the side where the predetermined path is located.

[0080] In this embodiment, the fourth sub-magnetic section 1204 includes three magnetic elements 129, two of which are stacked along the magnetic flux direction, and the third magnetic element 129 is closer to the switch assembly 11 than the two stacked magnetic elements 129 and is arranged approximately side-by-side with them. The fifth sub-magnetic section 1205 includes one magnetic element 129, which is adjacent to the separately arranged magnetic element 129 in the fourth sub-magnetic section 1204 and is deflected relative to it toward the side where the corresponding stationary contact 111 is located. All magnetic elements 129 in the second magnetic pole group 122 have the same magnetic pole orientation, and the magnetic pole orientation of the second magnetic pole group 122 is opposite to that of the first magnetic pole group 121, for driving the arc to bend a second time in another direction.

[0081] In one embodiment, the third magnetic pole group 123 includes a sixth sub-magnetic part 1206 and a seventh sub-magnetic part 1207. The seventh sub-magnetic part 1207 is closer to the predetermined path of the moving contact 112 than the sixth sub-magnetic part 1206. The seventh sub-magnetic part 1207 is deflected relative to the sixth sub-magnetic part 1206 toward the side where the predetermined path is located.

[0082] In this embodiment, the sixth sub-magnetic section 1206 includes three magnetic elements 129, two of which are stacked along the magnetic flux direction, and the third magnetic element 129 is closer to the switch assembly 11 than the two stacked magnetic elements 129 and is arranged approximately side-by-side with them. The seventh sub-magnetic section 1207 includes one magnetic element 129, which is adjacent to the separately arranged magnetic element 129 in the sixth sub-magnetic section 1206 and is deflected relative to it toward the side where the corresponding stationary contact 111 is located. All magnetic elements 129 in the third magnetic pole group 123 have the same magnetic pole orientation, and the magnetic pole orientation of the third magnetic pole group 123 is opposite to that of the second magnetic pole group 122, for driving the arc to bend a third time.

[0083] Understandably, from a top-down view along the direction perpendicular to the rotation plane of the moving contact 112, several magnetic elements 129 in the third sub-magnetic part 1203, the second magnetic pole group 122, and the third magnetic pole group 123 extend approximately in the direction pointing towards the rotation center of the moving contact 112. This guides the arc to extend towards the side of the switch assembly 11 and allows for a relatively large extension distance, rather than deflecting and bending within a small range along the predetermined path of the moving contact 112. Furthermore, the first magnetic pole group 121, the second magnetic pole group 122, and the third magnetic pole group 123, which are arranged at intervals, guide the arc through multiple bends, enabling the arc to have a large extension length within a relatively limited space, thereby effectively improving the arc extinguishing efficiency.

[0084] In one embodiment, the deflection angle of the seventh sub-magnet 1207 relative to the sixth sub-magnet 1206 is greater than the deflection angle of the fifth sub-magnet 1205 relative to the fourth sub-magnet 1204.

[0085] In this embodiment, along the direction of movement of the moving contact 112, the magnetic elements 129 in the subsequent second magnetic pole group 122 and third magnetic pole group 123 exhibit a certain angular deflection. Specifically, the closer the magnetic element 129 is to the end of the path (such as the seventh sub-magnet 1207), the greater its inward tilt angle, forming a layout similar to a concentric converging opening. Furthermore, the total magnetic flux (or number of magnets) of the second magnetic pole group 122 and the third magnetic pole group 123 is designed to be equal or similar, and both are greater than that of the first magnetic pole group 121, to ensure that the middle and tail sections have sufficient and balanced control force during the process of the arc being stretched into an S-shape.

[0086] Understandably, the deflection settings of the fifth sub-magnetic section 1205 and the seventh sub-magnetic section 1207 change the direction of the magnetic field lines. At the end of the arc movement, the guiding effect of the magnetic field on the arc is further enhanced, causing the arc to deflect or converge at a specific angle, thereby more accurately entering the subsequent arc extinguishing structure (such as the arc extinguishing grid plate 136) and reducing the possibility of arc dissipation.

[0087] It should be noted that this application embodiment uses a square permanent magnet block as an example to illustrate the magnetic element 129. In order to clarify the specific measurement boundary of the "deflection angle", in this application, "the deflection angle of the fifth sub-magnetic part 1205 relative to the fourth sub-magnetic part 1204" refers to the two-dimensional projection plane parallel to the rotation plane of the moving contact 112 (e.g., ...). Figure 6 On the view plane shown, the angle formed between the extending straight line of the magnetic element constituting the fifth sub-magnet 1205 toward the predetermined path side surface and the extending straight line of the magnetic element constituting the fourth sub-magnet 1204 toward the predetermined path side surface. Similarly, the "deflection angle of the seventh sub-magnet 1207 relative to the sixth sub-magnet 1206" refers to the angle formed on the two-dimensional projection plane shown above, between the extending straight line of the magnetic element constituting the seventh sub-magnet 1207 toward the predetermined path side surface and the extending straight line of the magnetic element constituting the sixth sub-magnet 1206 toward the predetermined path side surface. Figure 6 As shown, at the end of the stroke of the moving contact 112, the relative angle of the inward bending and contraction of the seventh sub-magnet 1207 relative to the sixth sub-magnet 1206 is greater than the relative angle of the inward bending and contraction of the fifth sub-magnet 1205 relative to the fourth sub-magnet 1204.

[0088] In one embodiment, a second arc-extinguishing groove 1302 is constructed between the second magnetic pole group 122 and the first magnetic pole group 121 for deflecting the arc generated when the moving contact 112 separates from the stationary contact 111; a third arc-extinguishing groove 1303 is constructed between the third magnetic pole group 123 and the second magnetic pole group 122 for deflecting the arc generated when the moving contact 112 separates from the stationary contact 111; the second arc-extinguishing groove 1302 and the third arc-extinguishing groove 1303 are connected.

[0089] In this embodiment, a connecting compartment or channel is reserved in the shell structure between adjacent magnetic pole groups 120 (i.e., where the polarity is reversed). The second arc-extinguishing groove 1302 is located between the first magnetic pole group 121 and the second magnetic pole group 122, and the third arc-extinguishing groove 1303 is located between the second magnetic pole group 122 and the third magnetic pole group 123. The first arc-extinguishing groove 1301 is connected to the second arc-extinguishing groove 1302, and the second arc-extinguishing groove 1302 is connected to the third arc-extinguishing groove 1303; the first arc-extinguishing groove 1301, the second arc-extinguishing groove 1302, and the third arc-extinguishing groove 1303 are spatially interconnected, forming a continuous wave-like or tortuous arc diffusion space, which is used to guide the arc elongation.

[0090] Understandably, the second arc-extinguishing groove 1302 and the third arc-extinguishing groove 1303 are respectively located between adjacent magnetic pole groups 120, i.e., in the transition region where the magnetic field polarity is reversed. In these regions, the direction of the Lorentz force changes abruptly, causing the arc shape to bend violently. The connected second arc-extinguishing groove 1302 and the third arc-extinguishing groove 1303 provide continuous extension space for this bent arc, allowing the arc to smoothly connect in space when transitioning between different polarity magnetic field control regions, maintaining the continuity of the arc's S-shaped trajectory.

[0091] In other embodiments, depending on the actual arc extinguishing needs, other magnetic pole groups 120 can be further set downstream of the third magnetic pole group 123 to continue guiding the arc bending and ultimately achieve the expected arc extinguishing effect.

[0092] In one embodiment, each magnetic pole group 120 includes at least one pair of stacked magnetic elements 129, which are located on the side of the magnetic pole group 120 away from the predetermined path.

[0093] In this embodiment, the magnetic element 129 can be a high-performance permanent magnet (e.g., neodymium iron boron). The term "stacked arrangement" refers to enhancing the magnetic field by increasing the number or thickness of magnets in a direction perpendicular to the plane of motion of the moving contact 112. Specifically, in the configuration of the magnetic pole group 120, the portion near the predetermined path (inner ring) of the moving contact 112 uses a single-layer magnetic element 129 structure, while the portion away from the predetermined path (outer ring) of the moving contact 112 uses a double-layer or multi-layer magnetic element 129 stacked vertically. For example, the second sub-magnetic section 1202, the third sub-magnetic section 1203, the fourth sub-magnetic section 1204, and the sixth sub-magnetic section 1206 each have a structure with two magnets stacked together.

[0094] Understandably, by using multiple magnetic elements 129 combined to form the magnetic pole group 120, it is possible to adapt to irregular installation spaces inside the switch through a dispersed arrangement. Simultaneously, stacking the magnetic pole group 120 on the side furthest from the predetermined path (i.e., the radially outer side) increases the volume of magnetic material and magnetic flux density at that location. This results in a non-uniform magnetic field distribution in the radial direction, with a relatively weaker magnetic field on the inner side (single layer or fewer layers) and a relatively stronger magnetic field on the outer side (stacked layers). This gradient difference in magnetic field strength generates a magnetic pressure difference pointing towards the strong magnetic field region (i.e., the outer side). In addition to the Lorentz force, this magnetic pressure difference provides an additional driving force, helping to draw the arc from the contact area or push it towards the outer arc-extinguishing area, maintaining the continuity of the arc's S-shaped trajectory.

[0095] Compared to a single-stage deflection achieved by reversing a single set of magnetic poles (such as a single S-shape or simple double-break recovery), the arc-extinguishing switch device provided in this application utilizes a multi-stage folding structure achieved through three or more stages of polarity reversal. This not only simply increases the path length but also enhances the arc voltage rise rate through the plasma turbulence effect generated by multiple force jumps. This multi-stage folding structure offers far greater space utilization than the single-stage deflection of existing technologies, representing a significant generational difference in ultra-miniaturized DC isolators.

[0096] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. An arc-extinguishing switch device, characterized in that, include: The switch assembly (11) includes a separable stationary contact (111) and a moving contact (112), the moving contact (112) being movably disposed relative to the stationary contact (111) and configured to move along a predetermined path; The magnetic component (12) includes a plurality of magnetic pole groups (120) spaced apart along the extension direction of the predetermined path, including at least a first magnetic pole group (121), a second magnetic pole group (122) and a third magnetic pole group (123); the first magnetic pole group (121) is disposed corresponding to the stationary contact (111), the magnetic pole orientation of the second magnetic pole group (122) is opposite to that of the first magnetic pole group (121), and the magnetic pole orientation of the third magnetic pole group (123) is opposite to that of the second magnetic pole group (122).

2. The arc-extinguishing switch device according to claim 1, characterized in that, Each of the magnetic pole groups (120) includes a plurality of magnetic elements (129), and the magnetic poles of the plurality of magnetic elements (129) in each of the magnetic pole groups (120) are oriented in the same direction.

3. The arc-extinguishing switch device according to claim 2, characterized in that, The first magnetic pole group (121) includes a first sub-magnetic part (1201), a second sub-magnetic part (1202), and a third sub-magnetic part (1203). The first sub-magnetic part (1201) is stacked with the contact area of ​​the stationary contact (111) and the moving contact (112). The first sub-magnetic part (1201) is located between the second sub-magnetic part (1202) and the third sub-magnetic part (1203) along the extension direction of the predetermined path. The second sub-magnetic part (1202) is located on the side of the third sub-magnetic part (1203) away from the second magnetic pole group (122) along the extension direction of the predetermined path. The magnetic flux of the third sub-magnetic part (1203) is greater than that of the second sub-magnetic part (1202).

4. The arc-extinguishing switch device according to claim 3, characterized in that, The first sub-magnetic part (1201), the second sub-magnetic part (1202) and the third sub-magnetic part (1203) are spaced apart, and a first arc-extinguishing groove (1301) is constructed between the second sub-magnetic part (1202) and the third sub-magnetic part (1203) for deflecting the arc generated when the moving contact (112) separates from the stationary contact (111).

5. The arc-extinguishing switch device according to claim 2, characterized in that, The second magnetic pole group (122) includes a fourth sub-magnetic part (1204) and a fifth sub-magnetic part (1205), wherein the fifth sub-magnetic part (1205) is closer to the predetermined path of the moving contact (112) than the fourth sub-magnetic part (1204), and the fifth sub-magnetic part (1205) is deflected relative to the fourth sub-magnetic part (1204) toward the side where the predetermined path is located; the third magnetic pole group (123) includes a sixth sub-magnetic part (1206) and a seventh sub-magnetic part (1205). 07), the seventh sub-magnet (1207) is closer to the predetermined path of the moving contact (112) than the sixth sub-magnet (1206), and the seventh sub-magnet (1207) is deflected relative to the sixth sub-magnet (1206) toward the side where the predetermined path is located; the deflection angle of the seventh sub-magnet (1207) relative to the sixth sub-magnet (1206) is greater than the deflection angle of the fifth sub-magnet (1205) relative to the fourth sub-magnet (1204).

6. The arc-extinguishing switch device according to claim 5, characterized in that, A second arc-extinguishing groove (1302) is constructed between the second magnetic pole group (122) and the first magnetic pole group (121) for deflecting the arc generated when the moving contact (112) separates from the stationary contact (111); a third arc-extinguishing groove (1303) is constructed between the third magnetic pole group (123) and the second magnetic pole group (122) for deflecting the arc generated when the moving contact (112) separates from the stationary contact (111); the second arc-extinguishing groove (1302) and the third arc-extinguishing groove (1303) are connected.

7. The arc-extinguishing switch device according to claim 2, characterized in that, Each of the magnetic pole groups (120) includes at least one pair of stacked magnetic elements (129), which are located on the side of the magnetic pole group (120) away from the predetermined path.

8. The arc-extinguishing switch device according to claim 1, characterized in that, The moving contact (112) is configured to rotate, and the magnetization direction of each of the magnetic pole groups (120) is perpendicular to the rotation plane of the moving contact (112).

9. The arc-extinguishing switch device according to claim 8, characterized in that, The arc-extinguishing switch device (10) further includes a housing assembly (13), which includes a first shell layer (131) and a second shell layer (132) stacked in a direction perpendicular to the rotation plane of the moving contact (112). The magnetic component (12) is disposed in the first shell layer (131), and the second shell layer (132) includes a plurality of grid plates (136) extending in a direction perpendicular to the rotation plane of the moving contact (112). Each magnetic pole group (120) is provided with at least one grid plate (136). The plurality of grid plates (136) are arranged at intervals along the extension direction of the predetermined path to form an arc-extinguishing groove for deflecting the arc generated when the moving contact (112) separates from the stationary contact (111).

10. The arc-extinguishing switch device according to claim 1, characterized in that, The switch assembly (11) includes two stationary contacts (111) and two moving contacts (112). The switch assembly (11) also includes a rotating moving contact disk (113). The two moving contacts (112) are fixedly connected to the moving contact disk (113) and are arranged symmetrically about the rotation axis of the moving contact disk (113). The two stationary contacts (111) are fixedly arranged and are arranged symmetrically about the rotation axis of the moving contact disk (113). The arc extinguishing switch device (10) includes two sets of magnetic components (12) arranged symmetrically about the rotation axis of the moving contact disk (113). Each set of magnetic components (12) corresponds to one stationary contact (111).

11. An electrical disconnect switch, characterized in that, The device includes an operating device (21) and an arc-extinguishing switch device (10) as described in any one of claims 1 to 10. A plurality of the arc-extinguishing switch devices (10) are stacked together. The operating device (21) is driven connected to at least one of the plurality of arc-extinguishing switch devices (10) for driving the switch assembly (11) to rotate.

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