Isolation switch

Abstract

An isolating switch comprises an operating mechanism and a plurality of second switch units which are arranged in a stacked mode, each second switch unit comprises a shell, a rotating contact assembly and a static contact, the rotating contact assembly and the static contact are installed in the shell, and the rotating contact assembly comprises a supporting cover, a moving contact and a supporting base which are sequentially arranged in a stacked mode. The supporting seat and the supporting cover clamp the moving contact. The moving contact comprises a first contact and a second contact which are oppositely arranged, two ends of the first contact and two ends of the second contact are provided with clamping gaps for accommodating the static contact, the moving contact is connected with or disconnected from the static contact through the clamping gaps, and the supporting seat and the supporting cover are provided with second via holes. And at least one driving shaft passes through second via holes in the supporting seats and the supporting covers of the plurality of second switch units and is linked with the rotary contact assemblies of the plurality of second switch units at the same time, and the driving shaft is directly or indirectly connected with the operating mechanism, so that the switching-on and switching-off consistency of the plurality of second switch units is improved, and voltage / current imbalance is prevented.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a disconnecting switch. Background Technology

[0002] Disconnect switches serve to isolate power supplies and break circuits. With the rapid development of the photovoltaic field, disconnect switches have been widely used. In existing technology, disconnect switches include stacked operating mechanisms and multiple switching units. The operating mechanism is connected to the rotating contact assemblies of adjacent switching units, and the rotating contact assemblies of adjacent switching units are then connected in sequence. As a result, when the operating mechanism drives multiple switching units to open and close simultaneously, the transmission distance increases with the number of switching units. This leads to a significant time difference between the actions of switching units farther from the operating mechanism and those closer to the operating mechanism, resulting in poor consistency in the opening and closing of multiple switching units and a tendency to produce voltage / current imbalance. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an isolating switch that improves the consistency of opening and closing of multiple switching units.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A disconnecting switch includes a stacked operating mechanism and a plurality of second switching units. Each second switching unit includes a housing, a rotary contact assembly and a stationary contact mounted within the housing. The rotary contact assembly includes a support cover, a moving contact and a support base stacked sequentially, the support base and support cover clamping the moving contact. The moving contact includes a first contact and a second contact disposed opposite to each other, the two ends of the first contact and the second contact having clamping gaps to accommodate the stationary contact. The moving contact is connected to or disconnected from the stationary contact through the clamping gaps. The support base and support cover are provided with a second through hole. At least one drive shaft passes through the second through hole on the support base and support cover of the plurality of second switching units and is simultaneously linked with the rotary contact assembly of the plurality of second switching units. The drive shaft is directly or indirectly connected to the operating mechanism.

[0006] In one possible implementation, a drive shaft is provided in the middle of the second switching unit, and a second through hole is provided on the first and second contacts. The drive shaft passes through the middle of the moving contact and through all the second switching units.

[0007] In one possible implementation, the middle portion of the moving contact extends to both sides along the width direction to form two protrusions, and the second through hole on the moving contact is located between the two protrusions.

[0008] In one possible implementation, the support base and support cover are provided with two second through holes, and two parallel drive shafts are provided at a midpoint between the plurality of second switch units. The two drive shafts pass through the two second through holes respectively, so that the moving contact is disposed between the two drive shafts.

[0009] In one possible implementation, the middle portion of the moving contact is recessed towards the central region of the moving contact on both sides along the width direction, forming two clearance areas to avoid the two drive shafts, with the two drive shafts extending into the clearance areas through the support base and the support cover.

[0010] In one possible implementation, the portion of the drive shaft extending from the housing of the second switch unit closest to the operating mechanism is provided with a linkage mechanism for connecting to the operating mechanism.

[0011] In one possible implementation, the support base and support cover are made of an insulating gas-generating material.

[0012] In one possible implementation, the housing of the second switch unit is further provided with a first upper partition and a first lower partition arranged opposite to each other. The rotary contact assembly and the two arc-extinguishing grid groups are disposed between the first upper partition and the first lower partition. The first upper partition and the first lower partition each include a first support platform and a second support platform arranged opposite to each other. The first support platform and the second support platform respectively abut against the two arc-extinguishing grid groups to fix the two arc-extinguishing grid groups in the housing.

[0013] In one possible implementation, the first upper partition and the first lower partition are made of an insulating gas-generating material.

[0014] In one possible implementation, the first and second support platforms have two arc-shaped protrusions extending towards the support cover on the side near the rotation axis; a contact assembly receiving groove is provided in the middle of the first upper partition and the first lower partition, between the two arc-shaped protrusions, and the rotating contact assembly is disposed in the contact assembly receiving groove, with a first through hole provided in the middle of the contact assembly receiving groove.

[0015] In one possible implementation, the arc-shaped boss contains a magnet.

[0016] In one possible implementation, at least one first switching unit is further included, wherein the first switching unit and the second switching unit are stacked, the cross-sectional area of ​​the stationary contact of the first switching unit is larger than the cross-sectional area of ​​the stationary contact of the second switching unit, and the cross-sectional area of ​​the moving contact of the first switching unit is larger than the cross-sectional area of ​​the moving contact of the second switching unit.

[0017] In one possible implementation, the operating mechanism is connected to the rotary contact assembly of the first switching unit via a turntable, and the rotary contact assembly of the first switching unit is connected to the drive shaft.

[0018] Compared with the prior art, the disconnecting switch provided by this utility model includes multiple stacked second switching units. Each second switching unit includes a housing, and a rotary contact assembly, a first stationary contact, and a second stationary contact are disposed inside the housing. The first stationary contact, the second stationary contact, and the rotary contact assembly are connected and cooperated to connect or disconnect the circuit. The rotary contact assembly includes a stacked support base, a moving contact, and a support cover. A second through hole is provided on the support base and support cover of each second switching unit. At least one drive shaft passes through the second through hole, which can realize the simultaneous rotation of multiple rotary contact assemblies, improve the consistency of the opening and closing of the multiple stacked second switching units, and prevent the phenomenon of voltage / current imbalance.

[0019] Furthermore, a second through hole is provided on the first and second contacts of the moving contact. A drive shaft passes through the second through hole on the moving contact, the support base, and the support cover simultaneously. Since the second through hole is provided on the first and second contacts, the middle part of the moving contact extends and protrudes to both sides along the width direction to form a protrusion, which can improve the structural strength of the moving contact and improve the service life of the rotating contact assembly.

[0020] Furthermore, no second through hole is provided on the first and second contacts of the moving contact. Two second through holes are provided on the support base and the support cover respectively. Two parallel drive shafts pass through the second through holes on the support cover and the support base. The sides of the first and second contacts are recessed along the width direction to form two clearance areas. The drive shafts passing through the sides of the support cover and the support base are tightly attached to the two clearance areas to clamp the moving contact, improve the firmness of the moving contact, and prevent the moving contact from shaking during rotation.

[0021] Furthermore, a first upper partition and a first lower partition are provided in the first switching unit, and the rotating contact assembly and two arc-extinguishing grid groups are arranged between the first upper partition and the first lower partition. The first upper partition and the first lower partition can clamp and fix the rotating contact assembly and the two arc-extinguishing grid groups along the thickness direction of the first switching unit to form an integral arc-extinguishing space, improve the arc-extinguishing performance, and enable arc extinguishing with higher current carrying capacity.

[0022] Furthermore, the first upper partition plate and the first lower partition plate are equipped with a first support platform, a second support platform, a contact assembly receiving groove, an arc-shaped boss, and a magnet, which greatly improve the arc extinguishing performance.

[0023] Furthermore, the disconnecting switch of this utility model includes at least one first switching unit and a plurality of second switching units stacked together. The cross-sectional area of ​​the first stationary contact, the second stationary contact and the moving contact of the first switching unit is greater than the cross-sectional area of ​​the moving contact, the first stationary contact and the second stationary contact of the second switching unit. The first switching unit has a greater current carrying capacity than the second switching unit and can be used in high current circuits. Attached Figure Description

[0024] Figure 1 and Figure 2 This is a schematic diagram of the structure of an embodiment of the disconnecting switch of this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the first switching unit embodiment of this utility model;

[0026] Figure 4 and Figure 5 This is a schematic diagram of the rotating contact assembly of the first switching unit of this utility model;

[0027] Figure 6 yes Figure 5 Exploded view of the moving contact in the embodiment;

[0028] Figure 7 This is a schematic diagram of the structure of an embodiment of the rotating contact assembly including two drive shafts in the second switching unit of this utility model;

[0029] Figure 8 This is a schematic diagram of the structure of an embodiment of the rotating contact assembly including a drive shaft in the second switching unit of this utility model;

[0030] Figure 9 This is a schematic diagram of an embodiment of the second switching unit of this utility model, which includes a drive shaft.

[0031] Figure 10 This is a schematic diagram of an embodiment of the second switching unit of this utility model, which includes two drive shafts.

[0032] Figure 11 and Figure 12 This is a schematic diagram of the structure of the arc-extinguishing grid group, the rotating contact assembly, and the arrangement of the stationary contact in the first switching unit of this utility model;

[0033] Figure 13 This is a schematic diagram of the structure of the second stationary contact of the first switching unit of this utility model;

[0034] The reference numerals in the attached drawings include: operating mechanism 104; switching unit 100; rotary contact assembly 1; stationary contact 2; moving contact 11; first switching unit 101; second switching unit 102; turntable 103; first contact portion 21; first connecting portion 22; first wiring portion 23; first overlapping portion 212; first extension portion 213; limiting groove 24; arc extinguishing grid assembly 3; support cover 12; moving contact 11; support base 13; first contact 111; second contact 112; moving contact receiving groove 14; contact support 141; fixed shaft 142. ; Groove 143; Elastic element 144; Hot melt column 131; Hot melt hole 132; Main plug 121; Groove 1211; Arc-shaped support column 15; Arc-shaped protrusion 16; Arc-shaped hole 161; Slide groove 17; Support boss 171; First upper partition 51; First lower partition 52; First support platform 53; Second support platform 54; Arc-shaped boss 531; Contact assembly receiving groove 55; First through hole 56; Insulating side plate 31; Arc extinguishing grid 32; Mounting hole 61; Mounting bracket 62; Drive shaft 7; Second through hole 71; Protrusion 113; Boss 125. Detailed Implementation

[0035] The specific embodiments of this utility model are further described below with reference to the accompanying drawings. The scope of protection of this utility model is not limited to the description of the following embodiments.

[0036] like Figures 1-10 As shown, the disconnecting switch includes a stacked operating mechanism 104 and at least one switching unit 100. The operating mechanism 104 is used to control the switching unit 100 to close the circuit or open the circuit. The switching unit 100 includes a housing and a switch contact disposed inside the housing. The switch contact includes a rotating contact assembly 1 and at least one stationary contact. The rotating contact assembly 1 is rotatably configured to contact or disconnect with the stationary contact to realize the conduction or disconnection of the circuit. The operating mechanism 104 is connected to the rotating contact assembly 1 of the adjacent switching unit 100, and the rotating contact assemblies 1 of the adjacent switching units 100 are linked together. The rotary contact assembly 1 includes at least one moving contact 11. The moving contact 11 has clamping gaps at both ends for holding a stationary contact. The moving contact 11 contacts or disconnects from the stationary contact through these clamping gaps. When the moving contact 11 rotates to a certain angle, its two ends can contact and close with the stationary contact, thus connecting the circuit. When the moving contact 11 rotates again, it can disconnect from the stationary contact, thus disconnecting the circuit. The disconnecting switch is typically connected in series in the circuit, and the connection and disconnection of the moving contact 11 with the stationary contact control the circuit's continuity. The rotary contact assembly 1 also includes a linkage mechanism. The rotary contact assemblies 1 of adjacent switch units 100 are stacked and inserted together along the thickness direction of the switch unit 100 to form a single unit. The linkage mechanism of the operating mechanism 104 is connected to the rotary contact assembly 1, enabling the coordinated operation of multiple rotary contact assemblies 1.

[0037] The plurality of switch units 100 of this utility model include at least one first switch unit 101 and / or at least one second switch unit 102 stacked together.

[0038] One improvement of this application is that multiple second switching units 102 adopt an integrated drive shaft 7, which improves the consistency of opening and closing of multiple second switching units 102.

[0039] like Figures 9-10 As shown, the disconnecting switch includes multiple stacked second switch units 102. Each second switch unit 102 has a rotating contact assembly 1 and a stationary contact. The stationary contact includes a first stationary contact and a second stationary contact 2. The rotating contact assembly 1 includes a support cover 12, a moving contact 11, and a support base 13 stacked sequentially. The support base 13 and the support cover 12 clamp the moving contact 11. The moving contact 11 includes a first contact 111 and a second contact 112 disposed opposite to each other. The two ends of the first contact 111 and the second contact 112 have clamping gaps to accommodate the first stationary contact and the second stationary contact 2. The moving contact 11 is connected to or disconnected from the first stationary contact and the second stationary contact 2 through the clamping gaps. The support base 13 and the support cover 12 are provided with second through holes 71. At least one drive shaft 7 passes through the second through holes 71 on the support base 13 and the support cover 12 of the multiple second switch units 102 and is simultaneously linked with the rotating contact assemblies 1 of the multiple second switch units 102. By providing a second through hole 71 on the support base 13 and the support cover 12, at least one drive shaft 7 passes through the second through hole 71 on the support base 13 and the support cover 12 of multiple second switch units 102. The multiple second switch units 102 are driven to rotate synchronously by the same drive shaft 7, which can improve the consistency of opening and closing of multiple second switch units 102.

[0040] Specifically, such as Figure 8 and Figure 9 As shown, in one embodiment, a drive shaft 7 passes through the rotary contact assemblies 1 of multiple second switch units 102 and is drivenly connected to the rotary contact assemblies 1 of multiple second switch units 102. A second through hole 71 with the same cross-sectional shape as the drive shaft 7 is formed on the moving contact 11, support base 13 and support cover 12 of the rotary contact assembly 1. That is, a second through hole 71 is also provided on the first contact 111 and the second contact 112. A drive shaft 7 is provided to pass through the rotary contact assembly 1 and also passes through the moving contact 11, which greatly increases the consistency of the opening and closing of multiple second switch units 102.

[0041] Furthermore, the drive shaft 7 and the second through hole 71 are in a concave-convex fit, mutually limiting each other along the rotation direction of the drive shaft 7. For example, preferably, the second through hole 71 is shaped like a plum blossom, and the cross-section of the drive shaft 7 is also the same shape as the second through hole 71. The concave-convex fit between the drive shaft 7 and the second through hole 71 improves the driving effect. As another embodiment, the cross-section of the drive shaft 7 can obviously also be a polygonal, oval, or other non-circular structure.

[0042] Furthermore, such as Figure 8 As shown, the middle part of the moving contact 11 extends to both sides along the width direction to form two protrusions 113. The second through hole 71 on the moving contact 11 is located between the two protrusions 113, which can increase the area of ​​the middle part of the moving contact 11. Since the middle part of the moving contact 11 is penetrated by the drive shaft 7 to form the second through hole 71, the protrusions 113 on both sides of the moving contact 11 can increase the structural strength of the moving contact 11 and enhance its service life.

[0043] Furthermore, in one embodiment provided by this application, the moving contact 11 is provided with two fixed shafts 142, which are disposed on both sides of the second through hole 71.

[0044] Furthermore, the drive shaft 7 has at least two recessed areas along its length. Two drive protrusions 125 are provided on the upper part of the support cover 12 of the rotary contact assembly 1. The two drive protrusions 125 on the support cover 12 are placed in the two recessed areas and abut against the drive shaft 7. The two drive protrusions 125 that cooperate with the drive shaft 7 on the upper part of the support cover 12 can increase the stability of the rotation of the rotary contact assembly 1 during the rotation driven by the drive shaft 7.

[0045] Preferred, such as Figure 7 and Figure 10 As shown, in another embodiment, two parallel drive shafts 7 are spaced apart at the center of the plurality of second switch units 102. Two second through holes 71 are correspondingly provided on the support base 13 and the support cover 12. The two drive shafts 7 pass through the two second through holes 71 respectively, so that the moving contact 11 is positioned between the two drive shafts 7. Providing two drive shafts 7 makes the rotation of the rotating contact assembly 1 more stable.

[0046] Furthermore, in one embodiment provided in this application, the middle part of the moving contact 11 is recessed towards the central region of the moving contact 11 on both sides along the width direction, forming two clearance areas to avoid the two drive shafts 7. The two drive shafts 7, which pass through the support base 13 and the support cover 12, extend into the clearance areas of the moving contact 11 and abut against the middle part of the moving contact 11, thereby driving the moving contact 11 to rotate together.

[0047] Furthermore, the moving contact 11 provided in this embodiment includes two fixed shafts 142, which are distributed along the length direction of the moving contact 11.

[0048] Preferably, a linkage mechanism is provided on the portion of the drive shaft 7 extending out of the housing of the second switch unit 102 closest to the operating mechanism 104. That is, the drive shaft 7 of the second switch unit 102 near the operating mechanism 104 can partially extend out of the housing, serving as part of the linkage mechanism, and can be directly or indirectly connected to the operating mechanism 104, or the drive shaft 7 can be directly or indirectly connected to the rotary contact assembly 1 of the first switch unit 101. Specifically, a turntable 103 is connected between the operating mechanism 104 and the drive shaft 7. The operating mechanism 104 drives the turntable 103, which in turn drives the drive shaft 7 to rotate. The drive shaft 7 drives multiple rotary contact assemblies 1 to rotate, completing the opening and closing of multiple second switch units 102, thus improving the consistency of the opening and closing of multiple second switch units 102.

[0049] In this embodiment, the operating mechanism 104, the first switching unit 101, and a plurality of second switching units 102 are stacked sequentially. The operating mechanism 104 is connected to the rotating contact assembly 1 of the first switching unit 101 via a turntable 103. The rotating contact assembly 1 of the first switching unit 101 is connected to a drive shaft 7, which drives the plurality of second switching units 102 to operate synchronously. Alternatively, the plurality of second switching units 102 can be positioned above the first switching unit 101.

[0050] Furthermore, the drive shaft 7 of the second switch unit 102, which is furthest from the operating mechanism 104, can pass only through the rotating contact assembly 1 of the second switch unit 102 without penetrating the bottom of the housing.

[0051] Preferred, such as Figures 3-6 As shown, the moving contact 11 includes a first contact 111 and a second contact 112 disposed opposite to each other. The two ends of the first contact 111 and the second contact 112 have clamping gaps to accommodate the first stationary contact and the second stationary contact 2. The moving contact 11 is connected or disconnected from the first stationary contact and the second stationary contact 2 through the clamping gaps. A moving contact receiving groove 14 is provided between the support base 13 and the support cover 12. A limiting structure is provided in the moving contact receiving groove 14, and the moving contact 11 is limited in the moving contact receiving groove 14.

[0052] Preferably, the moving contact 11 further includes a contact support 141 and at least one fixed shaft 142. The contact support 141 has two grooves 143 on its opposite sides, and the two grooves 143 are through-type structures along the length of the moving contact 11. The middle portions of the first contact 111 and the second contact 112 of the moving contact 11 are respectively placed in the two grooves 143. At least one fixed shaft 142 passes through the middle portions of the first contact 111, the second contact 112 and the contact support 141, so that the first contact 111, the second contact 112 and the contact support 141 are fixed as a whole. The moving contact receiving groove 14 is provided with a limiting structure that cooperates with the contact support 141. The contact support 141 is disposed in the moving contact receiving groove 14. The support cover and the support seat are fixed by heat riveting, which improves the creepage distance.

[0053] In this embodiment, a contact support 141 is provided in the middle of the moving contact 11. The contact support 141 has grooves 143 on its opposite sides, and these grooves 143 are through-type structures along the length of the moving contact 11. The middle portions of the first contact 111 and the second contact 112 of the moving contact 11 are respectively placed within the two grooves 143. The clamping gaps at both ends of the moving contact 11 extend out of the grooves 143 and engage with the first stationary contact and the second stationary contact 2. The contact support 141 provides a better enclosure for the moving contact 11, enhancing its structural strength. The support base 13 and the support cover 12 are matched with the contact support 141 for limiting their position. All three are made of insulating material, facilitating the formation of a single unit. Compared to the prior art, the moving contact 11 of this application has better stability, higher structural strength, and improved insulation performance, making it suitable for higher current carrying capacity. This addresses the risk of breakdown between the first switching unit and other switching units when a high current is applied.

[0054] Of course, as another inferior embodiment, the moving contact 11 may not be provided with contact support 141, but only include at least one fixed shaft 142, at least one fixed shaft 142 is fixed in the middle of the first contact 111 and the second contact 112, so that the first contact 111 and the second contact 112 are fixed as a whole, and the clamping gap is formed at both ends of the moving contact 11.

[0055] Furthermore, such as Figure 6As shown, the moving contact 11 also includes at least one elastic element 144. The at least one elastic element 144 is disposed on the opposite side of the first contact 111 and / or the second contact 112. The elastic element 144 disposed on the moving contact 11 can provide clamping force to the clamping gap at both ends of the moving contact 11, improve the clamping effect between the moving contact 11 and the first stationary contact and the second stationary contact 2, and can also effectively improve the current carrying capacity and temperature rise performance of the disconnecting switch. In a preferred embodiment of this application, at least one fixed shaft 142 passes through the first contact 111, the second contact 112, the contact support 141, and at least one elastic member 144, thereby fixing the first contact 111, the second contact 112, the contact support 141, and at least one elastic member 144 into a whole; or, in other embodiments, the contact support 141 is not provided, and at least one fixed shaft 142 is fixed in the middle of the first contact 111, the second contact 112, and at least one elastic member 144, thereby fixing the first contact 111, the second contact 112, and at least one elastic member 144 into a whole.

[0056] Furthermore, in the preferred embodiment provided in this application, an elastic element 144 is respectively provided on the two opposite sides of the moving contact 11, and a fixed shaft 142 is provided in the middle of the moving contact 11. The fixed shaft 142 passes through the middle of the first contact 111, the second contact 112, the two elastic elements 144 and the contact support 141, fixing the first contact 111, the second contact 112, the two elastic elements 144 and the contact support 141 into a whole, and is installed in the moving contact receiving groove 14 between the support base 13 and the support cover 12, and is clamped and fixed by the support base 13 and the support cover 12.

[0057] Preferred, such as Figure 5 As shown, a hot melt column 131 and a hot melt hole 132 are provided between the support base 13 and the support cover 12, or a hot melt column 131 and a hot melt groove are provided between the support base 13 and the support cover 12. The support base 13 and the support cover 12 are installed and fixed by the hot melt column 131 and the hot melt hole 132 / or the hot melt column 131 and the hot melt groove.

[0058] Furthermore, two hot melt pillars 131 are spaced apart on the support base 13, and two hot melt holes 132 are provided on the support cover 12 at positions relative to the hot melt pillars 131 of the support base 13. The support base 13 and the support cover 12 are stacked and fixedly installed along the thickness direction of the moving contact 11. After the moving contact 11 is installed between the support base 13 and the support cover 12, the two hot melt pillars 131 are located on both sides of the moving contact 11 and are symmetrical with the rotation axis of the moving contact 11.

[0059] By fusing the hot-melt column 131 and the hot-melt hole 132 into one piece through a hot-melt process, gas leakage can be reduced, creepage distance increased, insulation performance improved, and it is suitable for higher current carrying capacity. After the support base 13 and support cover 12 are installed and fixed, the cooperation of the hot-melt column 131 and the hot-melt hole 132 enhances the spatial sealing of the middle part of the support base 13 and support cover 12, allowing the gas generated by the arc burning the support base 13 and support cover 12 to move towards both ends of the moving contact 11, thereby propelling the arc towards the arc-extinguishing chamber and accelerating arc extinguishing. Of course, as other embodiments, the support base 13 and support cover 12 can also be fixed by screws or other methods, but their sealing performance is somewhat worse than that of the hot-melt column 131 and hot-melt hole 132 hot-melt fixing method.

[0060] Hot melt technology has the advantages of simple structure, no need for additional fastening parts, good sealing after fixing, and not easy to leak air. The hot melt processing is vibration-free, pollution-free, noise-free, environmentally friendly, energy-saving, fast and efficient.

[0061] Preferred, such as Figure 5 As shown, the rotary contact assembly 1 is provided with a linkage mechanism for connecting with the operating mechanism 104 or the rotary contact assembly 1 of an adjacent switch unit 100. The linkage mechanism includes a main plug 121 provided on the outer surface of the support cover 12. The main plug 121 is located above the moving contact receiving groove 14 and corresponds to the position of the moving contact receiving groove 14. The main plug 121 extends out of the upper surface of the support cover 12. The bottom of the support base 13 is provided with a first plug hole. The protruding part of the main plug 121 can be embedded in the first plug hole for connecting with the support base 13 of the rotary contact assembly 1 of the adjacent disconnect switch unit 100.

[0062] Furthermore, the main plug 121 has multiple grooves 1211 extending along the thickness direction of the moving contact 11 on both sides. The cross-section of the multiple grooves 1211 forms a fishbone-like structure. The first plug hole has a protrusion structure that drives and cooperates with the grooves 1211 of the main plug 121. The multiple grooves 1211 on the main plug 121 can increase the friction between the main plug 121 and the first plug hole, making the installation of the multiple rotating contact assemblies 1 stacked along the thickness direction of the moving contact 11 more secure.

[0063] In one possible implementation, the support cover 12 is further provided with a second plug hole at the position of the main plug 121, and the main plug 121 can be inserted into the second plug hole along the thickness direction of the moving contact 11.

[0064] In another possible implementation, the support cover 12 does not have a second plug hole, and the main plug 121 is integrally formed with the support cover 12.

[0065] When multiple switch units 100 are stacked, multiple rotary contact assemblies 1 need to be linked. The multiple rotary contact assemblies 1 can be linked by the cooperation of the protruding part of the main plug 121 on the support cover 12 of one rotary contact assembly 1 with the first plug hole at the bottom of the support seat 13 of another rotary contact assembly 1.

[0066] The limiting structure includes the sidewall of the moving contact receiving groove 14. The contact support 141 is placed inside the moving contact receiving groove 14 and is limited and engaged with the sidewall of the moving contact receiving groove 14. Two arc-shaped support columns 15 are provided on the support base 13. The two arc-shaped support columns 15 are arranged opposite each other along the width direction of the moving contact 11. After the support base 13, support cover 12 and contact support 141 are installed, the two arc-shaped support columns 15 are located on both sides of the contact support 141. The two arc-shaped support columns 15 extend along the thickness direction of the moving contact 11. The arc-shaped support columns 15 form part of the sidewall of the moving contact receiving groove 14. An arc-shaped hole 161 or an arc-shaped groove is provided on the support cover 12 to cooperate with the arc-shaped support columns 15. The arc-shaped support columns 15 pass through the arc-shaped hole 161 or arc-shaped groove to fix the support base 13 and support cover 12.

[0067] Preferably, the support base 13 and the support cover 12 are disc-shaped structures with the same diameter, and the support base 13 and the support cover 12 are provided with a plurality of weight-reducing holes to reduce the weight of the support base 13 and the support cover 12. Preferably, the weight-reducing holes are located away from the center of the support base 13 and the support cover 12.

[0068] The support base 13 and support cover 12 are made of insulating gas-generating material. When the moving contact 11 and the first stationary contact and the second stationary contact 2 come into contact or separate, an electric arc is generated. Under the high temperature erosion of the electric arc, the support base 13 and support cover 12 generate gas to cool the electric arc. At the same time, the generated gas will also propel the electric arc toward the arc-extinguishing chamber, thereby accelerating the arc extinguishing.

[0069] Furthermore, such as Figure 4As shown, the maximum length of the moving contact 11 in its longitudinal direction is less than or equal to the diameter of the support base 13 and the support cover 12. There are two sliding grooves 17 between the edges of the support base 13 and the support cover 12. The two sliding grooves 17 are respectively arranged on both sides of the width direction of the moving contact receiving groove 14. An isolation boss is provided between the sliding groove 17 and the moving contact receiving groove 14 to separate the sliding groove 17 and the moving contact receiving groove 14, thereby improving the insulation performance and preventing electric arc erosion of the moving contact 11. Only one end of the two sliding grooves 17 is connected to both ends of the moving contact receiving groove 14, so that the first stationary contact and the second stationary contact 2 extending into the sliding groove 17 can cooperate with the clamping gaps at both ends of the moving contact 11. The first stationary contact and the second stationary contact 2 extend into the two sliding grooves 17 respectively, corresponding to the rotation trajectory of the support base 13 and the support cover 12 and the clamping gaps at both ends of the moving contact 11, which are either inserted or disconnected. After the moving contact 11 is installed between the support base 13 and the support cover 12, the two ends of the moving contact 11 will not protrude from the support base 13 and the support cover 12, which can further improve the insulation performance. Moreover, the arc can be guided into the arc extinguishing chamber through the sliding groove 17.

[0070] Of course, in other embodiments, the length of the moving contact 11 may also be longer than the diameter of the support base 13 and the support cover 12. That is, after the moving contact 11 is installed between the support base 13 and the support cover 12, both ends of the moving contact 11 can extend out of the support base 13 and the support cover 12. The first stationary contact and the second stationary contact 2 and the moving contact 11 are inserted and engaged outside the support base 13 and the support cover 12. All of these are within the protection scope of this application.

[0071] Preferred, such as Figure 5 As shown, the isolation boss includes a support boss 171. Two support bosses 171 are provided between the two slide grooves 17 and the moving contact receiving groove 14. The two support bosses 171 form the two slide grooves 17 after the support base 13 and the support cover 12 are installed, and the support bosses 171 isolate the moving contact receiving groove 14 from the slide grooves 17.

[0072] Furthermore, the two support protrusions 171 can be disposed on the support base 13 or on the support cover 12; or the support protrusions 171 can be disposed on both the support base 13 and the support cover 12, with the support protrusions 171 on the support base 13 and the support protrusions 171 on the support cover 12 correspondingly disposed in the thickness direction of the moving contact 11. In this case, the support base 13 includes two support protrusions 171, and the support cover 12 includes two support protrusions 171.

[0073] Preferred, such as Figure 5As shown, two arc-shaped support columns 15 are respectively disposed on the two support bosses 171, and two hot-melt columns 131 are respectively disposed on the two support bosses 171. After the support base 13 and the support cover 12 are installed, the two arc-shaped support columns 15 can partially extend out of the outer surface of the support cover 12. The bottom of the support base 13 is provided with two second arc-shaped grooves corresponding to the arc-shaped support columns 15. The protruding parts of the two arc-shaped support columns 15 can be embedded in the second arc-shaped grooves for connection with the support base 13 of the rotating contact assembly 1 of the adjacent switch unit 100. When multiple first switch units 101 are stacked, adjacent first switch units 101 can be fixed not only by the main plug 121, but also by the two arc-shaped support columns 15, which provides a better fixing effect.

[0074] Preferred, such as Figure 7 and Figure 8 As shown, in one possible embodiment, the moving contact 11 is not provided with a contact support. To form the clamping gap at both ends of the moving contact 11, the first contact 111 and the second contact 112 are bent structures. The first contact 111 is bent toward the second contact 112 from the middle of its side relative to the second contact 112, forming a first pressing portion at the middle of the first contact 111 and two first gap portions at both ends. Alternatively, the second contact 112 is bent toward the first contact 111 from the middle of its side relative to the first contact 111, forming a second pressing portion, and second gap portions are formed at both ends of the second contact 112, so that the first pressing portions and the second pressing portions of the first contact 111 and the second contact 112 abut against each other, forming the clamping gap at both ends of the first contact 111 and the second contact 112. Preferably, the first pressing portion and the first gap portions at both ends are parallel, and the second pressing portion is parallel to the second gap portions at both ends.

[0075] Or, such as Figure 6 As shown, in another possible embodiment, the first contact 111 and the second contact 112 are both flat plate structures, and at least one boss is provided between the first contact 111 and the second contact 112. The at least one boss makes the first contact 111 and the second contact 112 parallel to each other, forming the clamping gap at both ends of the moving contact 11.

[0076] Preferred, such as Figures 5-9 As shown, the first contact 111 and the second contact 112 have arc-shaped protrusions 16 on their sides. The arc-shaped protrusions 16 of the first contact 111 and the arc-shaped protrusions 16 of the second contact 112 are arranged opposite to each other and the distance between them is greater than the distance of the clamping gap between the first contact 111 and the second contact 112.

[0077] By providing arc-shaped protrusions 16 at the ends of the first contact 111 and the second contact 112, their opening angle can be greater than the distance of the clamping gap between the first contact 111 and the second contact 112, which makes it easier for the moving contact 11 to be inserted with the first stationary contact and the second stationary contact 2.

[0078] Furthermore, both sides of the first contact 111 and the second contact 112 are provided with arc-shaped protrusions 16, or, as shown in the embodiments of this application, one side of the first contact 111 and the second contact 112 is provided with an arc-shaped protrusion 16. It follows the rotation direction of the moving contact 11 and is inserted and connected with the first stationary contact and the second stationary contact 2. When the moving contact 11 rotates clockwise or counterclockwise to be inserted and connected with the first stationary contact and the second stationary contact 2, the arc-shaped protrusion 16 is provided on one side of the first contact 111 and the second contact 112. The moving contact 11 can be connected with the first stationary contact and the second stationary contact 2 by rotating clockwise or counterclockwise. At this time, the arc-shaped protrusion 16 is respectively provided on both sides of the first contact 111 and the second contact 112, satisfying the condition that it can be connected with the first stationary contact and the second stationary contact 2 by rotating clockwise or counterclockwise.

[0079] Of course, in some inferior embodiments, the arc-shaped protrusion 16 may not be arranged opposite to each other. It may only be arranged on one side, for example, only on the first contact 111 or the second contact 112, which can save production costs. It can be seen that the connection relationship between the arc-shaped protrusion 16 and the moving contact 11 can have various embodiments. All those that can be conceived by those skilled in the art in combination with the prior art are within the protection scope of this application. In addition, the arc-shaped protrusion 16 may not be an absolutely arc-shaped structure. As long as it is convenient to be inserted with the first stationary contact and the second stationary contact 2 to achieve the same technical effect, it is within the protection scope of this application and will not be elaborated further.

[0080] Preferred, such as Figure 3 As shown, the housing of the switch unit 100 is provided with two arc-extinguishing grid groups 3, which are used to extinguish the electric arc generated when the moving contact 11 and the first stationary contact and the second stationary contact 2 come into contact or break. The two arc-extinguishing grid groups 3 are respectively arranged on both sides of the rotating contact assembly 1 and are arranged intersectingly with the first stationary contact and the second stationary contact 2.

[0081] Furthermore, such as Figure 11 and Figure 12As shown, the two arc-extinguishing grid groups 3 are arc-shaped. After connecting with the first stationary contact and the second stationary contact 2, they can form a closed circle. The rotating contact assembly 1 is located at the center of the circle. Because the rotating contact assembly 1 is rotated, during the contact and separation process between the moving contact 11 and the first and second stationary contacts 2, the movement trajectory of the moving contact 11 is arc-shaped. The arc following the movement trajectory of the moving contact 11 is also approximately arc-shaped. The arc shape of the two arc-extinguishing grid groups 3 can reduce the resistance to the arc movement, which is more conducive to the arc smoothly entering the two arc-extinguishing grid groups 3, achieving a better arc extinguishing effect. Figure 11 and Figure 12 This is a schematic diagram of the arrangement of the arc-extinguishing grid plate group 3 and the rotating contact assembly 1, taking the first switch unit 101 as an example. When multiple switch units 100 are stacked, the first wiring portion 23 of the second stationary contact 2 of each layer is staggered in the thickness direction of the switch unit 100 to prevent the second stationary contact 2 of each layer from exceeding the safe electrical clearance range and generating an arc short circuit.

[0082] Preferably, the housing of the switch unit 100 is further provided with a first upper partition 51 and a first lower partition 52 arranged opposite to each other along the thickness direction of the moving contact 11. The rotating contact assembly 1 and the two arc-extinguishing grid plate groups 3 are arranged between the first upper partition 51 and the first lower partition 52. In a preferred embodiment, the first upper partition 51 and the first lower partition 52 each include a first abutment 53 and a second abutment 54 arranged at relative intervals. The first abutment 53 and the second abutment 54 respectively abut against the two arc-extinguishing grid plate groups 3, fixing the two arc-extinguishing grid plate groups 3 in the housing.

[0083] Furthermore, the first support platform 53 and the second support platform 54 have two arc-shaped protrusions 531 extending towards the support cover 12 on the side near the rotation axis; a contact assembly receiving groove 55 is provided in the middle of the first upper partition plate 51 and the first lower partition plate 52, between the two arc-shaped protrusions 531, and the rotating contact assembly 1 is disposed in the contact assembly receiving groove 55. A first through hole 56 is provided in the middle of the contact assembly receiving groove 55 for the linkage mechanism to pass through.

[0084] Furthermore, the arc-shaped protrusion 531 is provided with a magnet, which is used to magnetically blow the electric arc into the corresponding arc-extinguishing grid plate group 3 to realize magnetic arc extinguishing and enhance the arc extinguishing effect.

[0085] A first upper partition 51 and a first lower partition 52 are provided in the switching unit 101. The rotating contact assembly 1 and the two arc-extinguishing grid plate groups 3 are arranged between the first upper partition 51 and the first lower partition 52. The first upper partition 51 and the first lower partition 52 can clamp and fix the rotating contact assembly 1 and the two arc-extinguishing grid plate groups 3 along the thickness direction of the switching unit 101 to form an integral arc-extinguishing space, improve the arc-extinguishing performance, and enable arc extinguishing with higher current carrying capacity.

[0086] Furthermore, the first upper partition 51 and the first lower partition 52 are made of insulating gas-generating material. When the moving contact 11 contacts or separates from the first stationary contact and the second stationary contact 2, an electric arc is generated. The gas generated by the first upper partition 51 and the first lower partition 52 under the high-temperature erosion of the electric arc can cool the arc. Simultaneously, the generated gas also propels the arc towards the arc-extinguishing chamber, thereby accelerating arc extinguishing.

[0087] The first upper partition plate and the first lower partition plate are equipped with a first support platform, a second support platform, a contact assembly receiving groove, an arc-shaped boss, and a magnet, and are made of insulating gas-generating material, which greatly improves the arc-extinguishing performance. Of course, only one of these structures can be provided.

[0088] Preferably, the support base 13 and the support cover 12 are circular with the same diameter, and the first upper partition 51 and the first lower partition 52 are also circular with the same diameter. When the disconnecting switch includes multiple switch units 100 stacked together, the first upper partition 51 and the first lower partition 52 are respectively installed on the housings of two adjacent switch units 100.

[0089] Preferably, the arc-extinguishing grid assembly 3 includes two insulating side plates 31 and multiple stacked arc-extinguishing grids 32. The arc-extinguishing grids 32 have an opening structure in the middle, and two grid legs are formed on both sides of the opening structure. Adjacent arc-extinguishing grids 32 are arranged alternately, so that the bottom inclination direction of the opening structure of adjacent arc-extinguishing grids 32 is opposite; that is, one arc-extinguishing grid 32 is installed facing forward, and another arc-extinguishing grid 32 is rotated 180 degrees and installed in the opposite direction, so that the inclination direction of the opening structure in adjacent arc-extinguishing grids 32 is opposite. The staggered arrangement of the bottom slopes of adjacent arc-extinguishing grids 32 will form an inwardly concave chamfer in the middle of the two arc-extinguishing grid assemblies 3. The formed chamfer is more conducive to lengthening the arc to achieve a better arc extinguishing effect.

[0090] Multiple arc-extinguishing grid plates 32 are radially mounted on two insulating side plates 31. Adjacent arc-extinguishing grid plates 32 have a fixed included angle, which is an acute angle. By stacking multiple arc-extinguishing grid plates 32 radially, the movement trajectory of the moving contact 11 can be matched. During the contact and separation process between the moving contact 11 and the first stationary contact and the second stationary contact 2, the movement trajectory of the moving contact 11 is arc-shaped, and the arc following the movement trajectory of the moving contact 11 is also approximately arc-shaped. Stacking multiple arc-extinguishing grid plates 32 radially can reduce the resistance to the movement of the arc, which is more conducive to the arc smoothly entering the two arc-extinguishing grid plate groups 3, thus achieving a better arc extinguishing effect.

[0091] Another improvement of this application is that the first switching unit 101 can be provided with a moving contact 11 and a first stationary contact and a second stationary contact 2 with a larger cross-sectional area compared to the second switching unit 102, and / or provide a better insulation protection structure, so that the first switching unit 101 can have a better current carrying capacity compared to the second switching unit 102.

[0092] The cross-sectional areas of the moving contact 11, the first stationary contact, and the second stationary contact 2 of the first switching unit 101 are larger than those of the moving contact 11, the first stationary contact, and the second stationary contact 2 of the second switching unit 102. Therefore, the first switching unit 101 has a stronger current-carrying capacity than the second switching unit 102 and can be used to conduct high-current circuits. This invention includes a first switching unit 101 and a second switching unit 102 with different current-carrying capacities to meet different current-carrying requirements. Preferably, the thickness of the first switching unit 101 is greater than the thickness of the second switching unit 102.

[0093] Preferred, such as Figure 1 and Figure 2 As shown, the thickness of the first switching unit 101 is greater than the thickness of the second switching unit 102, and the cross-sectional area of ​​the moving contact 11 of the first switching unit 101 is greater than the cross-sectional area of ​​the moving contact 11 of the second switching unit 102; the cross-sectional areas of the first stationary contact and the second stationary contact 2 of the first switching unit 101 are greater than the cross-sectional areas of the first stationary contact and the second stationary contact 2 of the second switching unit 102. Specifically, this can be manifested in that the thickness of the first stationary contact and the second stationary contact 2 of the first switching unit 101 is greater than the thickness of the first stationary contact and the second stationary contact 2 of the second switching unit 102, and the thickness of the moving contact 11 of the first switching unit 101 is greater than the thickness of the moving contact 11 of the second switching unit 102.

[0094] Furthermore, such as Figure 3 As shown, in this embodiment, the first stationary contact and / or the second stationary contact 2 of the first switch unit 101 include an integrally formed first contact portion 21, a first connecting portion 22, and at least two first wiring portions 23 connected in sequence. The first contact portion 21 extends into the housing and cooperates with the moving contact 11 of the rotating contact assembly 1. The at least two first wiring portions 23 connected to the first connecting portion 22 extend outward from the housing for external electrical connection. They can connect to external wires or be soldered to a PCB board. The first wiring portions 23 and the external wires can be fixedly connected by welding, riveting, or other methods. Alternatively, the first wiring portion 23 is provided with screws and nuts, and the first wiring portion 23 can be fixedly connected to the external wires by the screws and nuts. The first stationary contact and / or the second stationary contact 2 of the first switch unit 101 has two first wiring portions 23, which can shunt the circuit, reduce temperature rise, and allow for the passage of higher currents.

[0095] Preferred, such as Figure 3 and Figure 13 As shown, the second stationary contact 2 includes two parallel first wiring portions 23, which are perpendicular to the first connecting portion 22. One end of the first wiring portion 23 is connected to the first contact portion 21. The first contact portion 21 includes a first overlapping portion 212 and a first extension portion 213. The first overlapping portion 212 is connected to the moving contact 11. The first extension portion 213 increases the cross-sectional area of ​​the second stationary contact 2, which can increase the current carrying capacity of the second stationary contact 2 and improve the current carrying capacity of the switching unit 100. The first extension portion 213 is rectangular, and the length of the first extension portion 213 is greater than or equal to the distance between the two first wiring portions 23. An angle is formed between the first extension portion 213 and the first connecting portion 22. The angle is recessed towards the first connecting portion 22 to form a limiting groove 24. The limiting groove 24 can be used to limit one end of the arc-extinguishing grid plate group 3.

[0096] Of course, the shape of the second stationary contact 2 can have many similar embodiments, which will not be described in detail. Embodiments that increase the current carrying capacity of the second stationary contact 2 by increasing the cross-sectional area of ​​the second stationary contact 2 are all within the protection scope of this application. Preferably, in this embodiment, a first stationary contact and a second stationary contact 2 are disposed opposite to each other on the housing, and the first stationary contact includes only one of the first wiring portions 23.

[0097] Furthermore, such as Figure 2 As shown, the housing of the switch unit 100 is provided with mounting holes 61, and the mounting holes 61 of the stacked switch units 100 correspond one-to-one. The multiple switch units 100 also include mounting shafts passing through the mounting holes 61, and the multiple switch units 100 are fixedly installed through the mounting holes 61 and the mounting shafts. Mounting brackets 62 are provided on both sides of the disconnect switch, and the disconnect switch is assembled through the mounting brackets 62 on both sides.

[0098] Preferably, the disconnecting switch includes multiple stacked first switch units 101, and the linkage mechanism of the first switch unit 101 disposed on the operating surface protrudes from the housing. The linkage mechanism may be a main plug 121 and an arc-shaped support column 15. The operating mechanism 104 includes a turntable 103, which is connected to the linkage mechanism. The operating mechanism 104 drives the linkage mechanism to rotate multiple rotating contact assemblies 1 by driving the turntable 103.

[0099] As described above, the current-carrying capacity of the second switching unit 102 is weaker than that of the first switching unit 101. In this embodiment, the thickness of the second switching unit 102 is less than that of the first switching unit 101, the thickness of the arc-extinguishing grid group 3 of the second switching unit 102 is less than that of the arc-extinguishing grid group 3 of the first switching unit 101, and the thickness of the moving contact 11, the first stationary contact, and the second stationary contact 2 of the second switching unit 102 is less than that of the moving contact 11, the first stationary contact, and the second stationary contact 2 of the first switching unit 101. The remaining features of the second switching unit 102 are basically the same as the structural features of the first switching unit 101 described above, and can be used interchangeably, so they will not be repeated here. The rotating contact assemblies of the first switching unit 101 and the second switching unit 102 have basically the same structure. In the preferred embodiment of this application, the moving contact 11 of the rotating contact assembly of the first switching unit 101 is provided with a contact support 141, and the moving contact 11 of the rotating contact assembly of the second switching unit 102 may not be provided with a contact support 141. The first stationary contact and / or the second stationary contact 2 of the first switching unit 101 are provided with two first wiring portions 23, and the first stationary contact and the second stationary contact 2 of the second switching unit 102 are provided with only one first wiring portion 23, and the first contact portion 21 of the second stationary contact 2 of the second switching unit 102 is not provided with a first extension portion 213.

[0100] Specifically, in the embodiments provided in this application, the two ends of the moving contact 11 extend out of the support base 13 and the support cover 12 to overlap with the first stationary contact and the second stationary contact 2. After the two ends of the moving contact 11 extend out of the support base 13 and the support cover 12, they have a certain amount of room for movement, which can improve the elasticity of the two ends of the moving contact 11 to a certain extent and enhance the clamping effect.

[0101] Specifically, such as Figure 2 As shown, at least one first switch unit 101 and multiple second switch units 102 stacked in this application can achieve linkage operation through a linkage mechanism. The first wiring portion 23 of the second stationary contact 2 of each layer is arranged alternately on the left and right sides in the thickness direction of the switch unit 100. The linkage mechanism includes a main plug 121 and / or an arc-shaped support column 15 and a drive shaft 7.

[0102] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0103] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A disconnecting switch, comprising a stacked operating mechanism (104) and a plurality of second switching units (102), each second switching unit (102) comprising a housing, and a rotary contact assembly (1) and a first stationary contact and a second stationary contact (2) mounted within the housing, the rotary contact assembly (1) comprising a support cover (12), a moving contact (11) and a support base (13) stacked sequentially, the support base (13) and the support cover (12) clamping the moving contact (11); the moving contact (11) comprising a first contact (111) and a second contact (112) disposed opposite to each other, the two ends of the first contact (111) and the second contact (112) having clamping gaps for accommodating the first stationary contact and the second stationary contact (2), the moving contact (11) being connected to or disconnected from the first stationary contact and the second stationary contact (2) through the clamping gaps, characterized in that, The support base (13) and support cover (12) are provided with a second through hole (71). At least one drive shaft (7) passes through the second through hole (71) on the support base (13) and support cover (12) of multiple second switch units (102) and is linked with the rotary contact assembly (1) of multiple second switch units (102). The drive shaft (7) is directly or indirectly connected to the operating mechanism (104).

2. The disconnecting switch according to claim 1, characterized in that, The second switching unit (102) has a drive shaft (7) in the middle, and the first contact (111) and the second contact (112) are provided with a second through hole (71). The drive shaft (7) passes through the middle of the moving contact (11) and through all the second switching units (102).

3. The disconnecting switch according to claim 2, characterized in that, The moving contact (11) extends and protrudes to both sides in the width direction to form two protrusions (113), and the second through hole (71) on the moving contact (11) is located between the two protrusions (113).

4. The disconnecting switch according to claim 1, characterized in that, The support base (13) and support cover (12) are provided with two second through holes (71), and two parallel drive shafts (7) are provided at a midpoint between the multiple second switch units (102). The two drive shafts (7) pass through the two second through holes (71) respectively, so that the moving contact (11) is located between the two drive shafts (7).

5. The disconnecting switch according to claim 4, characterized in that, The middle part of the moving contact (11) is recessed towards the center area of ​​the moving contact (11) on both sides along the width direction, forming two avoidance areas to avoid the two drive shafts (7). The two drive shafts (7) passing through the support base (13) and the support cover (12) extend into the avoidance areas.

6. The disconnecting switch according to claim 1, characterized in that, The drive shaft (7) extends out of the housing of the second switch unit (102) closest to the operating mechanism (104) and is provided with a linkage mechanism for connecting with the operating mechanism (104).

7. The disconnecting switch according to claim 1, characterized in that, The support base (13) and support cover (12) are made of insulating gas-generating material.

8. The disconnecting switch according to claim 1, characterized in that, The housing of the second switch unit (102) is further provided with a first upper partition (51) and a first lower partition (52) arranged opposite to each other. The rotary contact assembly (1) and two arc-extinguishing grid plate groups (3) are arranged between the first upper partition (51) and the first lower partition (52). The first upper partition (51) and the first lower partition (52) each include a first support platform (53) and a second support platform (54) arranged opposite to each other. The first support platform (53) and the second support platform (54) respectively abut against the two arc-extinguishing grid plate groups (3) to fix the two arc-extinguishing grid plate groups (3) in the housing.

9. The disconnecting switch according to claim 8, characterized in that, The first upper partition (51) and the first lower partition (52) are made of insulating gas-generating material.

10. The disconnecting switch according to claim 8, characterized in that, The first support platform (53) and the second support platform (54) have two arc-shaped bosses (531) extending towards the support cover (12) on the side near the rotation axis; a contact assembly receiving groove (55) is provided in the middle of the first upper partition (51) and the first lower partition (52) and between the two arc-shaped bosses (531), and the rotating contact assembly (1) is provided in the contact assembly receiving groove (55), and a first through hole (56) is provided in the middle of the contact assembly receiving groove (55).

11. The disconnecting switch according to claim 10, characterized in that, The arc-shaped boss (531) contains a magnet.

12. The disconnecting switch according to claim 1, characterized in that, It also includes at least one first switching unit (101), the first switching unit (101) and the second switching unit (102) are stacked, the cross-sectional area of ​​the first stationary contact and the second stationary contact (2) of the first switching unit (101) is larger than the cross-sectional area of ​​the first stationary contact and the second stationary contact (2) of the second switching unit (102), and the cross-sectional area of ​​the moving contact (11) of the first switching unit (101) is larger than the cross-sectional area of ​​the moving contact (11) of the second switching unit (102).

13. The disconnecting switch according to claim 12, characterized in that, The operating mechanism (104) is connected to the rotary contact assembly (1) of the first switching unit (101) via the turntable (103), and the rotary contact assembly (1) of the first switching unit (101) is connected to the drive shaft (7).

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