Switch unit and isolating switch

Abstract

A switch unit and an isolation switch, the switch unit comprises a housing, a rotary contact assembly installed in the housing, two static contacts, and two arc extinguishing grid sheet groups arranged at two sides of the rotary contact assembly, the two static contacts are arranged at two sides of the rotary contact assembly at intervals, the static contacts and the arc extinguishing grid sheet groups are arranged in a crossing manner, and the two arc extinguishing grid sheet groups are arranged in the housing. At least one static contact comprises a second contact part, a second connecting part and at least two second wiring parts which are integrally formed and connected in sequence, the second contact part is matched with the moving contact of the rotary contact assembly, and the at least two second wiring parts extend to the outside of the shell and are used for being connected with external wires. According to the switch unit, at least one static contact is provided with two first wiring parts, shunting can be carried out on a circuit, temperature rise is reduced, and higher current can pass through the switch unit.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of low voltage apparatus, concretely relates to a switch unit and isolating switch. BACKGROUND

[0002] The isolating switch has the functions of isolating power supply and breaking circuit, with the rapid development of the photovoltaic field, the isolating switch is widely applied, which puts forward higher and higher requirements for the current-carrying capacity of the isolating switch.

[0003] The current-carrying capacity of the isolating switch in the prior art is poor, and when applied in a high-current scene, there is a great security risk.In addition, one isolating switch cannot meet the demand of different current-carrying capacity. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the defects of prior art, and provides a switch unit and isolating switch with stronger current-carrying capacity.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] Firstly, the utility model provides a switch unit, which comprises a shell, a rotating contact assembly, a first static contact, a second static contact and two arc-extinguishing grid piece groups arranged on both sides of the rotating contact assembly, the first static contact and the second static contact are respectively arranged on both sides of the rotating contact assembly, the first static contact, the second static contact and the arc-extinguishing grid piece groups are cross arranged, the first static contact and / or the second static contact comprises an integrally formed first contact part, a first connecting part and at least two first wiring parts connected in sequence, the first contact part is matched with the moving contact of the rotating contact assembly, and the at least two first wiring parts extend to the outside of the shell and are used for external electrical connection.

[0007] In a possible implementation mode, the second static contact comprises two parallel first wiring parts, the two first wiring parts are perpendicular to the first connecting part, one end of the first connecting part is connected with the first contact part, the first contact part comprises a first overlapping part and a first extension part, the first extension part is rectangular, the length of the first extension part is greater than or equal to the distance between the two first wiring parts, an included angle is formed between the first extension part and the first connecting part, the included angle is recessed to form a limiting recess in the direction of the first connecting part, and the limiting recess is used for limiting cooperation with the arc-extinguishing grid piece group.

[0008] In a possible implementation, the rotating contact assembly comprises a support cover, a movable contact and a support base arranged in sequence, and the support base and the support cover clamp the movable contact; the movable contact comprises oppositely arranged first and second contacts, and the two ends of the first and second contacts have clamping gaps for accommodating static contacts, and the movable contact is connected with or disconnected from the static contacts through the clamping gaps; the support base and the support cover are provided with a movable contact accommodating groove, and the movable contact is arranged in the movable contact accommodating groove.

[0009] In a possible implementation, the movable contact further comprises a contact support and at least one fixing shaft, two grooves are arranged on opposite surfaces of the contact support, the two grooves are through grooves along the length direction of the movable contact, the middle parts of the first and second contacts of the movable contact are arranged in the two grooves respectively, and the at least one fixing shaft penetrates the middle parts of the first and second contacts and the contact support, so that the first and second contacts and the contact support are fixed as a whole, the movable contact accommodating groove is provided with a limiting structure matched with the contact support, and the contact support is arranged in the movable contact accommodating groove.

[0010] In a possible implementation, the shell of the switch unit is further provided with oppositely arranged first and second lower partitions, the rotating contact assembly and the two sets of arc extinguishing grid fins are arranged between the first and second upper partitions, and the first and second upper partitions each comprise oppositely spaced first and second abutments, the first and second abutments respectively abut the two sets of arc extinguishing grid fins, and the two sets of arc extinguishing grid fins are fixed in the shell.

[0011] In a possible implementation, the first and second upper partitions are made of insulating gas generating materials.

[0012] In a possible implementation, the first and second abutments extend in the direction of the support cover on the side close to the rotation axis, and two arc-shaped bosses are arranged between the middle parts of the first and second upper partitions and the two arc-shaped bosses; the rotating contact assembly is arranged in a contact assembly accommodating groove arranged between the two arc-shaped bosses, and a first through hole is arranged in the middle part of the contact assembly accommodating groove.

[0013] In a possible implementation, the arc-shaped boss is provided with a magnet for blowing an electric arc into a corresponding set of arc extinguishing grid fins.

[0014] In a second aspect, the application provides an isolating switch comprising an operating mechanism and at least one switch unit arranged in sequence, and the at least one switch unit is the above-mentioned switch unit.

[0015] In a possible implementation manner, the isolating switch comprises a plurality of switch units, at least one of the switch units is the first switch unit, at least one of the switch units is the second switch unit, the first switch unit and the second switch unit are arranged in a stacked manner along a thickness direction of the switch unit, a cross-sectional area of the stationary contact of the first switch unit is greater than a cross-sectional area of the stationary contact of the second switch unit, and a cross-sectional area of the movable contact of the first switch unit is greater than a cross-sectional area of the movable contact of the second switch unit.

[0016] Compared with the prior art, at least one stationary contact of the switch unit of the present application comprises a first contact part, a first connecting part and at least two first wiring parts which are integrally formed and connected in sequence, the first contact part extends into the housing and cooperates with the movable contact of the rotating contact assembly, the at least two first wiring parts connected with the first connecting part extend to the outside of the housing for external electrical connection, at least one stationary contact of the first switch unit is provided with two first wiring parts, which can shunt the circuit, reduce the temperature rise, and be used for passing through higher current.

[0017] Further, the switch unit comprises a rotating contact assembly comprising a support cover, a movable contact and a support seat arranged in a stacked manner, a movable contact accommodating groove is arranged between the support cover and the support seat, the movable contact further comprises a contact support, the movable contact is mounted on the contact support, and the contact support is mounted in the movable contact accommodating groove to fix the support cover and the support seat by hot riveting, thereby improving the creepage distance and further improving the insulation protection performance of the movable contact to cope with the risk of breakdown of the first switch unit when connecting high current and other switch units.

[0018] Further, the first upper partition plate and the first lower partition plate are arranged in the first switch unit, the rotating contact assembly and the two arc extinguishing grid groups are arranged between the first upper partition plate and the first lower partition plate, the first upper partition plate and the first lower partition plate can clamp and fix the rotating contact assembly and the two arc extinguishing grid groups along the thickness direction of the first switch unit to form an integrated arc extinguishing space, thereby improving the arc extinguishing performance and enabling higher current arc extinguishing.

[0019] Further, the first upper partition plate and the first lower partition plate are arranged in the first switch unit, the rotating contact assembly and the two arc extinguishing grid groups are arranged between the first upper partition plate and the first lower partition plate, the first upper partition plate and the first lower partition plate can clamp and fix the rotating contact assembly and the two arc extinguishing grid groups along the thickness direction of the first switch unit to form an integrated arc extinguishing space, thereby improving the arc extinguishing performance and enabling higher current arc extinguishing.

[0020] The isolating switch of the present application comprises at least one first switch unit and a plurality of second switch units arranged in a stacked manner, the cross-sectional area of the movable contact and the stationary contact of the first switch unit is greater than the cross-sectional area of the movable contact and the stationary contact of the second switch unit, so that the first switch unit has stronger current-carrying capacity than the second switch unit and can be applied to a high-current circuit, and the first switch unit and the second switch unit with different current-carrying capacities in the present application can meet different current-carrying requirements. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 and Figure 2 is a structural schematic view of an embodiment of the isolating switch of the utility model;

[0022] Figure 3 is a structural schematic view of an embodiment of the first switch unit of the utility model;

[0023] Figure 4 and Figure 5 is a structural schematic view of the rotating contact assembly of the first switch unit of the utility model;

[0024] Figure 6 is Figure 5 is an exploded view of the moving contact of the embodiment;

[0025] Figure 7 is a structural schematic view of an embodiment of the rotating contact assembly of the second switch unit of the utility model including two drive shafts;

[0026] Figure 8 is a structural schematic view of an embodiment of the rotating contact assembly of the second switch unit of the utility model including one drive shaft;

[0027] Figure 9 is a structural schematic view of an embodiment of the second switch unit of the utility model including one drive shaft;

[0028] Figure 10 is a structural schematic view of an embodiment of the second switch unit of the utility model including two drive shafts;

[0029] Figure 11 and Figure 12 is a structural schematic view of the arrangement of the arc extinguishing grid piece group, the rotating contact assembly and the stationary contact of the first switch unit of the utility model;

[0030] Figure 13 is a structural schematic view of the second stationary contact of the first switch unit of the utility model;

[0031] 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

[0032] 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.

[0033] 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.

[0034] An improved point of the present application is that the plurality of switch units 100 comprises at least one first switch unit 101 and / or at least one second switch unit 102 arranged in a stack. Thus, the first switch unit 101 can be provided with a larger cross-sectional area of the movable contact 11 and the stationary contact, and / or a better insulation protection structure, compared with the second switch unit 102, and the first switch unit 101 can have a better current carrying capacity compared with the second switch unit 102.

[0035] The disconnector of the present application comprises at least one first switch unit 101 and / or a plurality of second switch units 102 arranged in a stack, and the stationary contact comprises a first stationary contact and a second stationary contact 2, the cross-sectional area of the movable contact 11, the first stationary contact and the second stationary contact 2 of the first switch unit 102 is larger than that of the movable contact 11, the first stationary contact and the second stationary contact 2 of the second switch unit 102, so that the first switch unit 101 has a stronger current carrying capacity compared with the second switch unit 102, and can be applied to a high current circuit. The disconnector of the present application comprises the first switch unit 101 and the second switch unit 102 with different current carrying capacities, which can meet different current carrying requirements. Preferably, the thickness of the first switch unit 101 is greater than that of the second switch unit 102.

[0036] Preferably, as shown in Figure 1 and Figure 2 , the thickness of the first switch unit 101 is greater than that of the second switch unit 102, the cross-sectional area of the movable contact 11 of the first switch unit 101 is greater than that of the movable contact 11 of the second switch unit 102, and the cross-sectional area of the first stationary contact and the second stationary contact 2 of the first switch unit 101 is greater than that of the first stationary contact and the second stationary contact 2 of the second switch unit 102. Specifically, the thickness of the first stationary contact and the second stationary contact 2 of the first switch unit 101 is greater than that of the first stationary contact and the second stationary contact 2 of the second switch unit 102, and the thickness of the movable contact 11 of the first switch unit 101 is greater than that of the movable contact 11 of the second switch unit 102.

[0037] Further, as shown in Figure 3As shown, the first static contact and / or the second static contact 2 of the first switch unit 101 in the embodiment includes a first contact part 21, a first connecting part 22 and at least two first wiring parts 23 which are integrally formed and connected in sequence. The first contact part 21 extends to the inside of the shell and cooperates with the moving contact 11 of the rotary contact assembly 1. The at least two first wiring parts 23 connected with the first connecting part 22 extend to the outside of the shell and are used for external electrical connection, which can be connected with external wires or welded with PCB boards. The first wiring part 23 and the external wires can be fixedly connected by welding, riveting or other methods. Alternatively, the first wiring part 23 is provided with a screw and a nut, and the first wiring part 23 can be fixedly connected with the external wires by the screw and the nut. The first static contact and / or the second static contact 2 of the first switch unit 101 is provided with two first wiring parts 23, which can shunt the circuit, reduce the temperature rise and be used for passing higher current.

[0038] Preferably, as shown in Figure 3 and Figure 13 As shown, the second static contact 2 includes two parallel first wiring parts 23 which are perpendicular to the first connecting part 22. One end of the first wiring part 23 is connected with the first contact part 21. The first contact part 21 includes a first overlapping part 212 and a first extending part 213. The first overlapping part 212 cooperates with the moving contact 11. The first extending part 213 increases the cross-sectional area of the second static contact 2, increases the current carrying capacity of the second static contact 2 and improves the current carrying capacity of the switch unit 100. The first extending part 213 is rectangular, the length of the first extending part 213 is greater than or equal to the distance between the two first wiring parts 23, an included angle is formed between the first extending part 213 and the first connecting part 22, the included angle is recessed towards the first connecting part 22 to form a limiting recess 24 which can be used for limiting one end of the arc extinguishing grid piece group 3.

[0039] Of course, the shape of the second static contact 2 can have various similar embodiments which are not described one by one. The embodiments for increasing the cross-sectional area of the second static contact 2 to increase the current carrying capacity of the second static contact 2 are within the protection scope of the present application. Preferably, in the embodiment, one first static contact and one second static contact 2 are oppositely arranged on the shell. The first static contact only includes one first wiring part 23.

[0040] Preferably, as shown in Figures 3-6As shown, the rotating contact assembly 1 of the switch unit 100 of the present application comprises a support cover 12, a movable contact 11 and a support base 13 which are sequentially stacked, the support base 13 and the support cover 12 clamping the movable contact 11; the movable contact 11 comprises oppositely arranged first and second contacts 111 and 112, the two ends of the first and second contacts 111 and 112 having clamping gaps accommodating first and second static contacts 2, the movable contact 11 being connected or disconnected with the first and second static contacts 2 through the clamping gaps; a movable contact accommodating groove 14 is arranged between the support base 13 and the support cover 12, and a limiting structure is arranged in the movable contact accommodating groove 14, and the movable contact 11 is limited in the movable contact accommodating groove 14.

[0041] Preferably, the movable contact 11 further comprises a contact support 141 and at least one fixing shaft 142, two grooves 143 are arranged on the opposite surfaces of the contact support 141, the two grooves 143 are through structures along the length direction of the movable contact 11, the middle parts of the first and second contacts 111 and 112 of the movable contact 11 are respectively arranged in the two grooves 143, and the at least one fixing shaft 142 penetrates the middle parts of the first and second contacts 111 and 112 and the contact support 141, so that the first and second contacts 111 and 112 and the contact support 141 are fixed as a whole, the limiting structure cooperating with the contact support 141 is arranged in the movable contact accommodating groove 14, and the contact support 141 is arranged in the movable contact accommodating groove 14, thereby improving the creepage distance through the hot riveting to fix the support cover and the support base.

[0042] In the embodiment of the present application, the contact support 141 is arranged in the middle part of the movable contact 11, the two opposite surfaces of the contact support 141 have grooves 143 which are through structures along the length direction of the movable contact 11, the middle parts of the first and second contacts 111 and 112 of the movable contact 11 are respectively arranged in the two grooves 143, the clamping gaps at the two ends of the movable contact 11 protrude out of the grooves 143 and are inserted and cooperated with the first and second static contacts 2, the contact support 141 has a good wrapping effect on the movable contact 11, enhances the structural strength of the movable contact 11, and the support base 13 and the support cover 12 are limited and cooperated with the contact support 141, all of which are insulating materials and are convenient to form a whole, compared with the prior art, the movable contact 11 of the present application has better stability, higher structural strength, can improve the insulation performance, is suitable for higher current, and can cope with the risk of breakdown of the first switch unit with other switch units when the first switch unit is turned on.

[0043] Of course, as other deteriorated embodiments, the moving contact 11 can also not be provided with the contact support 141, and only include at least one fixed shaft 142 fixed in the middle of the first contact 111 and the second contact 112, so as to fix the first contact 111 and the second contact 112 as a whole, and form the clamping gap at both ends of the moving contact 11.

[0044] Further, as shown in Figure 6 the moving contact 11 also includes at least one elastic member 144 arranged on the opposite surfaces of the first contact 111 and / or the second contact 112. The arrangement of the elastic member 144 on the moving contact 11 can provide clamping force for 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 effectively improve the current carrying capacity and temperature rise performance of the disconnector. In the preferred embodiment of the present application, the at least one fixed shaft 142 penetrates through the first contact 111, the second contact 112, the contact support 141 and the at least one elastic member 144, so as to fix the first contact 111, the second contact 112, the contact support 141 and the at least one elastic member 144 as a whole. Alternatively, in other embodiments, the contact support 141 is not arranged, and the at least one fixed shaft 142 is fixed in the middle of the first contact 111, the second contact 112 and the at least one elastic member 144, so as to fix the first contact 111, the second contact 112 and the at least one elastic member 144 as a whole.

[0045] Further, in the preferred embodiment provided in the present application, the opposite surfaces of the moving contact 11 are respectively provided with one elastic member 144, the middle of the moving contact 11 is provided with one fixed shaft 142, the fixed shaft 142 penetrates through the middle of the first contact 111, the second contact 112, the two elastic members 144 and the contact support 141, so as to fix the first contact 111, the second contact 112, the two elastic members 144 and the contact support 141 as a whole, and be clamped and fixed in the moving contact accommodating groove 14 between the support seat 13 and the support cover 12.

[0046] Preferably, as shown in Figure 5 the support seat 13 and the support cover 12 are arranged with a hot melt column 131 and a hot melt hole 132, or are arranged with a hot melt column 131 and a hot melt groove, and the support seat 13 and the support cover 12 are fixed and installed through the hot melt column 131 and the hot melt hole 132 / or the hot melt column 131 and the hot melt groove.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] In one possible implementation, the support cover 12 is 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 movable contact 11.

[0053] In another possible implementation, the support cover 12 is not provided with a second plug hole, and the main plug 121 is integrally formed with the support cover 12.

[0054] When a plurality of first switch units 101 are stacked, the plurality of rotary contact assemblies 1 need to be linked, and the plurality of 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 and the first plug hole at the bottom of the support base 13 of another rotary contact assembly 1.

[0055] The limiting structure includes the side wall of the movable contact accommodating groove 14, and the contact support 141 is arranged in the movable contact accommodating groove 14 and limitedly cooperates with the side wall of the movable contact accommodating groove 14. Two arc-shaped support columns 15 are arranged on the support base 13, and the two arc-shaped support columns 15 are oppositely arranged along the width direction of the movable contact 11. After the support base 13, the support cover 12 and the 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 movable contact 11, and the arc-shaped support column 15 constitutes part of the side wall of the movable contact accommodating groove 14. An arc-shaped hole 161 or an arc-shaped groove is arranged on the support cover 12 and cooperates with the arc-shaped support column 15, the arc-shaped support column 15 penetrates into the arc-shaped hole 161 or the arc-shaped groove, so that the support base 13 and the support cover 12 are installed and fixed.

[0056] Preferably, the support base 13 and the support cover 12 are disc-shaped structures with the same diameter, and a plurality of weight-reducing holes are arranged on the support base 13 and the support cover 12 to reduce the weight of the support base 13 and the support cover 12. Preferably, the weight-reducing holes are arranged at positions away from the center of the support base 13 and the support cover 12.

[0057] The support base 13 and the support cover 12 are made of insulating gas-producing materials. The movable contact 11 and the first and second stationary contacts 2 generate an electric arc at the moment of contact or separation. The support base 13 and the support cover 12 generate gas under the high-temperature erosion of the electric arc to cool the electric arc, and the generated gas also pushes the electric arc to move towards the arc-extinguishing chamber, thereby accelerating arc extinction.

[0058] Further, as shown in FIG. 1, the rotary contact assembly 1 includes a support base 13, a support cover 12, a contact support 141, a movable contact 11, a first stationary contact 2 and a second stationary contact 2. Figure 4As shown, the maximum length of the moving contact 11 in its length direction is less than or equal to the diameter of the support base 13 and the support cover 12, and two sliding grooves 17 are provided between the edges of the support base 13 and the support cover 12, and the two sliding grooves 17 are respectively arranged on both sides of the width direction of the moving contact accommodating groove 14. The isolation boss is arranged between the sliding groove 17 and the moving contact accommodating groove 14 to isolate the sliding groove 17 from the moving contact accommodating groove 14, improve the insulation performance, avoid arc erosion of the moving contact 11, and only one end of the two sliding grooves 17 is communicated with both ends of the moving contact accommodating groove 14, so that the first static contact and the second static contact 2 extending into the sliding groove 17 can cooperate with the clamping gap at both ends of the moving contact 11. The first static contact and the second static contact 2 respectively extend into the two sliding grooves 17, and the rotating track of the support base 13 and the support cover 12 is inserted or disconnected with the clamping gap at both ends of the moving contact 11. After the moving contact 11 is installed between the support base 13 and the support cover 12, the both ends of the moving contact 11 will not extend out of the support base 13 and the support cover 12, which can further improve the insulation performance, and the arc can be guided into the arc extinguishing chamber through the sliding groove 17.

[0059] Of course, in other embodiments, the length of the moving contact 11 can also be longer than the diameter of the support base 13 and the support cover 12, that is, the both ends of the moving contact 11 can extend out of the support base 13 and the support cover 12 after the moving contact 11 is installed between the support base 13 and the support cover 12. The first static contact and the second static contact 2 and the moving contact 11 are inserted and cooperated outside the support base 13 and the support cover 12, which all belong to the protection scope of the present application.

[0060] Preferably, as shown in the drawings, Figure 5 As shown, the isolation boss includes a support boss 171, and two support bosses 171 are arranged between the two sliding grooves 17 and the moving contact accommodating groove 14, and the support bosses 171 form the two sliding grooves 17 after the support base 13 and the support cover 12 are installed, and the support bosses 171 isolate the moving contact accommodating groove 14 from the sliding groove 17.

[0061] Further, the two support bosses 171 can be arranged on the support base 13 or on the support cover 12, or the support bosses 171 are arranged on the support base 13 and the support cover 12 at the same time. The support bosses 171 on the support base 13 and the support cover 12 are arranged correspondingly in the thickness direction of the moving contact 11. At this time, the support base 13 includes two support bosses 171, and the support cover 12 includes two support bosses 171.

[0062] Preferably, as shown in the drawings, Figure 5As shown, two arc-shaped support columns 15 are arranged on the two support bosses 171 respectively, and two hot-melt columns 131 are arranged on the two support bosses 171 respectively. When the support base 13 and the support cover 12 are installed, the two arc-shaped support columns 15 can partially protrude from 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 portions of the two arc-shaped support columns 15 can be embedded in the second arc-shaped grooves, so as to be connected with the support base 13 of the rotating contact assembly 1 of the adjacent switch unit 100. When a plurality of first switch units 101 are stacked and installed, the adjacent first switch units 101 can be fixed by the two arc-shaped support columns 15 in addition to being fixed by the main plug 121, so that the fixing effect is better.

[0063] Preferably, as shown in Figure 7 and Figure 8 In a possible implementation, the movable contact 11 is not provided with a contact support. In order to form the clamping gap at both ends of the movable contact 11, the first contact 111 and the second contact 112 are in a bent structure. The first contact 111 is bent towards the second contact 112 at a middle portion of one side of the second contact 112, a first pressing portion is formed at the middle portion of the first contact 111, and two first gap portions are formed at both ends of the first contact 111. Alternatively, the second contact 112 is bent towards the first contact 111 at a middle portion of one side of the first contact 111, a second pressing portion is formed, and second gap portions are formed at both ends of the second contact 112. The first pressing portion and the second pressing portion of the first contact 111 and the second contact 112 are in abutment, and the clamping gap is formed at both ends of the first contact 111 and the second contact 112. Preferably, the first pressing portion and the first gap portion at both ends are parallel, and the second pressing portion and the second gap portion at both ends are parallel.

[0064] Alternatively, as shown in Figure 6 In another possible implementation, the first contact 111 and the second contact 112 are both in a flat plate structure, and at least one boss is arranged between the first contact 111 and the second contact 112. The at least one boss allows the first contact 111 and the second contact 112 to be arranged in parallel, and the clamping gap is formed at both ends of the movable contact 11.

[0065] Preferably, as shown in Figures 5-9 The side edges of the first contact 111 and the second contact 112 at both ends are provided with arc-shaped protruding portions 16. The arc-shaped protruding portion 16 of the first contact 111 and the arc-shaped protruding portion 16 of the second contact 112 are arranged opposite to each other, and the distance therebetween is greater than the distance of the clamping gap between the first contact 111 and the second contact 112.

[0066] By setting the arc-shaped protruding part 16 at the end of the first contact 111 and the second contact 112, the opening angle can be larger than the distance of the clamping gap between the first contact 111 and the second contact 112, so that the movable contact 11 is more convenient to be plugged with the first stationary contact and the second stationary contact 2.

[0067] Further, the two sides of the first contact 111 and the second contact 112 are provided with the arc-shaped protruding part 16, or, as shown in the embodiment of the application, one side of the first contact 111 and the second contact 112 is provided with the arc-shaped protruding part 16. It complies with the rotating direction of the movable contact 11 and is plugged with the first stationary contact and the second stationary contact 2. When the movable contact 11 rotates clockwise or counterclockwise and is plugged with the first stationary contact and the second stationary contact 2, the arc-shaped protruding part 16 is arranged on one side of the first contact 111 and the second contact 112. The movable contact 11 can be connected with the first stationary contact and the second stationary contact 2 by clockwise rotation, and can also be connected with the first stationary contact and the second stationary contact 2 by counterclockwise rotation. At this time, the arc-shaped protruding part 16 is arranged on both sides of the first contact 111 and the second contact 112, which meets the condition that the movable contact 11 can be connected with the first stationary contact and the second stationary contact 2 by clockwise rotation, and can also be connected with the first stationary contact and the second stationary contact 2 by counterclockwise rotation.

[0068] Of course, in some relatively poor embodiments, the arc-shaped protruding part 16 can not be arranged oppositely. It can be arranged only on one side, for example, only on the first contact 111 or the second contact 112, so as to save production cost. As can be seen, the connection relationship between the arc-shaped protruding part 16 and the movable contact 11 can have various embodiments. Any embodiment that can be thought of by those skilled in the art in combination with the existing technology belongs to the protection scope of the application. In addition, the arc-shaped protruding part 16 can also be a non-absolute arc-shaped structure. As long as it is convenient to be plugged with the first stationary contact and the second stationary contact 2 and the same technical effect is achieved, it belongs to the protection scope of the application and will not be repeated.

[0069] Preferably, as shown in Figure 3 The housing of the first switch unit 101 is provided with two arc-extinguishing grid groups 3 for extinguishing the electric arc generated at the moment of contact or disconnection of the movable contact 11 and the first stationary contact and the second stationary contact 2. The two arc-extinguishing grid groups 3 are arranged on both sides of the rotating contact assembly 1 and cross the first stationary contact and the second stationary contact 2.

[0070] Further, as shown in Figure 11 and Figure 12As shown, the two arc extinguishing grid groups 3 are arc-shaped, and after being connected with the first and second static contacts 2, they can form a closed circle, and the rotating contact assembly 1 is arranged at the center of the circle. Since the rotating contact assembly 1 is arranged to rotate, the movement track of the moving contact 11 during the contact and separation of the moving contact 11 with the first and second static contacts 2 is arc-shaped, and the movement track of the arc is also approximately arc-shaped. The arc-shaped two arc extinguishing grid groups 3 can reduce the resistance of the movement of the arc, and are more conducive to the smooth entry of the arc into the two arc extinguishing grid groups 3, thereby achieving better arc extinguishing effect. Among them, Figure 11 and Figure 12 is a structure schematic view of the arrangement of the arc extinguishing grid group 3 and the rotating contact assembly 1, which is illustrated by taking the first switch unit as an example. When a plurality of switch units are arranged in layers, the first wiring part 23 of each layer and the second static contact 2 of each layer are arranged in left and right staggered arrangement in the thickness direction of the switch unit 100, so as to prevent each layer and the second static contact 2 of each layer from exceeding the safe electrical clearance range and causing arc short circuit.

[0071] Preferably, the housing of the switch unit 100 is further provided with a first upper partition plate 51 and a first lower partition plate 52 which are oppositely arranged along the thickness direction of the moving contact 11. The rotating contact assembly 1 and the two arc extinguishing grid groups 3 are arranged between the first upper partition plate 51 and the first lower partition plate 52. The first upper partition plate 51 and the first lower partition plate 52 each include a first abutting table 53 and a second abutting table 54 which are oppositely arranged. The first abutting table 53 and the second abutting table 54 respectively abut against the two arc extinguishing grid groups 3, so as to fix the two arc extinguishing grid groups 3 in the housing.

[0072] Further, the side of the first abutting table 53 and the second abutting table 54 close to the rotation axis extends two arc-shaped bosses 531 towards the support cover 12. The middle part of the first upper partition plate 51 and the first lower partition plate 52 and between the two arc-shaped bosses 531 are provided with a contact assembly accommodating groove 55. The rotating contact assembly 1 is arranged in the contact assembly accommodating groove 55. A first through hole 56 is arranged in the middle part of the contact assembly accommodating groove 55, which is used for the linkage mechanism to pass through.

[0073] Further, the arc-shaped boss 531 is provided with a magnet, which is used for magnetically blowing the arc into the corresponding arc extinguishing grid group 3, so as to achieve magnetic blowing arc extinguishing and enhance the arc extinguishing effect.

[0074] The first upper partition plate 51 and the first lower partition plate 52 are arranged in the first switch unit 101, and the rotating contact assembly 1 and the two arc extinguishing grid groups 3 are arranged between the first upper partition plate 51 and the first lower partition plate 52. The first upper partition plate 51 and the first lower partition plate 52 can clamp and fix the rotating contact assembly 1 and the two arc extinguishing grid groups 3 in the thickness direction of the first switch unit 101, so as to form an integrated arc extinguishing space, improve the arc extinguishing performance, and enable higher current arc extinguishing.

[0075] Further, the first upper partition plate 51 and the first lower partition plate 52 are made of insulation gas generating material. The arc is generated at the moment of contact or separation between the moving contact 11 and the first and second static contacts 2, and the first upper partition plate 51 and the first lower partition plate 52 generate gas under the high-temperature erosion of the arc, which can cool the arc and push the arc to move towards the arc extinguishing chamber, thereby accelerating the arc extinguishing.

[0076] The first upper partition plate and the first lower partition plate are provided with a first supporting table, a second supporting table, a contact assembly accommodating groove, an arc-shaped boss, a magnet and the like, and are made of insulation gas generating material, which greatly improves the arc extinguishing performance. Of course, only one of the structures can be provided.

[0077] Preferably, the support base 13 and the support cover 12 are circular with the same diameter, and the first upper partition plate 51 and the first lower partition plate 52 are also circular with the same diameter. When the disconnecting switch includes a plurality of first switch units 101 stacked, the first upper partition plate 51 and the first lower partition plate 52 are respectively mounted on the housings of two adjacent first switch units 101.

[0078] Preferably, the arc extinguishing grid group 3 includes two insulation side plates 31 and a plurality of arc extinguishing grids 32 stacked. The middle part of the arc extinguishing grid 32 is provided with an opening structure, and the arc extinguishing grid 32 forms two grid legs on both sides of the opening structure. Adjacent arc extinguishing grids 32 are arranged in positive and negative staggered manner, so that the bottom parts of the opening structures of adjacent arc extinguishing grids 32 are opposite in inclination direction. That is, one arc extinguishing grid 32 is installed in positive direction, and the other arc extinguishing grid 32 is installed in reverse direction after being rotated by 180 degrees, so that the inclination directions of the opening structures in the adjacent arc extinguishing grids 32 are opposite. The bottom parts of the adjacent arc extinguishing grids 32 are staggered, and a concave chamfer is formed in the middle part of the two arc extinguishing grid groups 3. The formed chamfer is more conducive to elongating the arc to achieve better arc extinguishing effect.

[0079] The plurality of arc extinguishing grids 32 are installed in a radial manner on the two insulation side plates 31, and the adjacent arc extinguishing grids 32 and the arc extinguishing grids 32 have a fixed included angle. The included angle is an acute angle. The plurality of arc extinguishing grids 32 are stacked in a radial manner, which can correspond to the movement track of the moving contact 11. Because the movement track of the moving contact 11 is arc-shaped during the contact and separation process between the moving contact 11 and the first and second static contacts 2, the movement track of the arc is also approximately arc-shaped. The plurality of arc extinguishing grids 32 are stacked in a radial manner, which can reduce the resistance of the arc movement, and is more conducive to the arc entering the two arc extinguishing grid groups 3 smoothly, thereby achieving better arc extinguishing effect.

[0080] Further, as shown in FIG. 6, the arc extinguishing grid group 3 includes two insulation side plates 31 and a plurality of arc extinguishing grids 32 stacked in a radial manner. The middle part of the arc extinguishing grid 32 is provided with an opening structure, and the arc extinguishing grid 32 forms two grid legs on both sides of the opening structure. Adjacent arc extinguishing grids 32 are arranged in positive and negative staggered manner, so that the bottom parts of the opening structures of adjacent arc extinguishing grids 32 are opposite in inclination direction. That is, one arc extinguishing grid 32 is installed in positive direction, and the other arc extinguishing grid 32 is installed in reverse direction after being rotated by 180 degrees, so that the inclination directions of the opening structures in the adjacent arc extinguishing grids 32 are opposite. The bottom parts of the adjacent arc extinguishing grids 32 are staggered, and a concave chamfer is formed in the middle part of the two arc extinguishing grid groups 3. The formed chamfer is more conducive to elongating the arc to achieve better arc extinguishing effect. Figure 2As shown, the housing of the first switch unit 101 is provided with a mounting hole 61, the mounting holes 61 of the plurality of first switch units 101 arranged in layers one by one correspond, the plurality of first switch units 101 further include a mounting shaft passing through the mounting hole 61, and the plurality of first switch units 101 are fixedly installed through the mounting hole 61 and the mounting shaft; The disconnecting switch is provided with a mounting bracket 62 on both sides, and the disconnecting switch is assembled through the mounting brackets 62 on both sides.

[0081] Preferably, the disconnecting switch includes a plurality of first switch units 101 arranged in layers, and the linkage mechanism of the first switch unit 101 arranged on the operation surface protrudes from the housing, wherein the linkage mechanism can be a main plug 121 and an arc-shaped support column 15, the operation mechanism 104 includes a rotating disc 103 connected with the linkage mechanism, and the operation mechanism 104 drives the linkage mechanism to rotate the plurality of rotating contact assemblies 1 by driving the rotating disc 103.

[0082] According to the above, the current-carrying capacity of the second switch unit 102 is weaker than that of the first switch unit 101, in the embodiment of the application, the thickness of the second switch unit 102 is smaller than that of the first switch unit 101, the thickness of the arc extinguishing grid group 3 of the second switch unit 102 is smaller than that of the arc extinguishing grid group 3 of the first switch unit 101, the thickness of the moving contact 11 and the first and second static contacts 2 of the second switch unit 102 is smaller than that of the moving contact 11 and the first and second static contacts 2 of the first switch unit 101, and the remaining features of the second switch unit 102 are basically the same as those of the first switch unit 101 described above, and can be mutually used, and will not be repeated here. The rotating contact assembly structure of the first switch unit 101 and the second switch unit 102 is basically the same, and in the preferred embodiment of the application, the moving contact 11 of the rotating contact assembly of the first switch unit 101 is provided with a contact support 141, and the moving contact 11 of the rotating contact assembly of the second switch unit 102 is not provided with a contact support 141; The first and / or second static contacts 2 of the first switch unit 101 are provided with two first wiring parts 23, the first and second static contacts 2 of the second switch unit 102 are provided with only one first wiring part 23, and the first extension part 213 is not arranged on the first contact part 21 of the second static contact 2 of the second switch unit 102.

[0083] Another improvement of the application is that the plurality of second switch units 102 adopt an integral driving shaft 7, which improves the consistency of the plurality of second switch units 102 in opening and closing.

[0084] As Figures 9-10As shown, the disconnector includes a plurality of second switch units 102 arranged in layers, and the second switch unit 102 is provided with a rotating contact assembly 1, a first static contact and a second static contact 2. The rotating contact assembly 1 includes a support cover 12, a movable contact 11 and a support base 13 arranged in layers in sequence, and the support base 13 and the support cover 12 clamp the movable contact 11. The movable contact 11 includes a first contact 111 and a second contact 112 arranged oppositely, and the two ends of the first contact 111 and the second contact 112 have clamping gaps for accommodating the first static contact and the second static contact 2. The movable contact 11 is connected or disconnected with the first static contact and the second static contact 2 through the clamping gaps. The support base 13 and the support cover 12 are provided with second through holes 71, and at least one drive shaft 7 passes through the second through holes 71 on the support base 13 and the support cover 12 of a plurality of second switch units 102, and simultaneously drives a plurality of rotating contact assemblies 1 of the second switch units 102. By arranging the second through holes 71 on the support base 13 and the support cover 12, at least one drive shaft 7 passes through the second through holes 71 on the support base 13 and the support cover 12 of a plurality of second switch units 102, and the plurality of second switch units 102 are driven to rotate synchronously by the same drive shaft 7, which can improve the consistency of the opening and closing of the plurality of second switch units 102.

[0085] Specifically, as shown in Figure 8 and Figure 9 In an embodiment, one drive shaft 7 penetrates a plurality of rotating contact assemblies 1 of the second switch units 102, and simultaneously drives a plurality of rotating contact assemblies 1 of the second switch units 102. Second through holes 71 are formed on the movable contact 11, the support base 13 and the support cover 12 of the rotating contact assembly 1, which have the same cross-sectional shape as the drive shaft 7, that is, the first contact 111 and the second contact 112 are also provided with second through holes 71. One drive shaft 7 penetrates the rotating contact assembly 1, and the drive shaft 7 also penetrates the movable contact 11, which greatly improves the consistency of the opening and closing of the plurality of second switch units 102.

[0086] Further, the drive shaft 7 and the second through hole 71 are matched in concave-convex, and are limited in the rotation direction of the drive shaft 7. For example, preferably, the second through hole 71 is in the shape of a plum blossom, and the cross section of the drive shaft 7 is also in the same shape as the second through hole 71. Through the concave-convex matching of the drive shaft 7 and the second through hole 71, the driving effect is better. As other embodiments, obviously, the cross section of the drive shaft 7 can also be polygonal, waist round and other non-circular structures.

[0087] Further, as shown in Figure 8As shown, the middle part of the movable contact 11 is extended to both sides in the width direction to form two protruding parts 113, and the second through hole 71 on the movable contact 11 is located between the two protruding parts 113, which can increase the area of the middle part of the movable contact 11. Since the middle part of the movable contact 11 is penetrated by the driving shaft 7 to form the second through hole 71, the protruding parts 113 arranged on both sides of the movable contact 11 can increase the structural strength of the movable contact 11 and enhance the service life.

[0088] Further, in an embodiment provided by the application, the movable contact 11 is provided with two fixing shafts 142, and the two fixing shafts 142 are arranged on both sides of the second through hole 71.

[0089] Further, the driving shaft 7 is formed with at least two recessed areas along the length direction of the driving shaft 7, and the support cover 12 of the rotary contact assembly 1 is provided with two driving bosses 125 arranged on the upper part of the support cover 12, and the two driving bosses 125 on the support cover 12 are arranged in the two recessed areas and abut against the driving shaft 7. The two driving bosses 125 arranged on the upper part of the support cover 12 cooperate with the driving shaft 7, which can increase the stability of the rotary contact assembly 1 during the driving of the rotary contact assembly 1 by the driving shaft 7.

[0090] Preferably, as shown in Figure 7 and Figure 10 In another embodiment, the middle part of the plurality of second switch units 102 is arranged with two parallel driving shafts 7, and the support base 13 and the support cover 12 are correspondingly provided with two second through holes 71, and the two driving shafts 7 pass through the two second through holes 71 respectively, so that the movable contact 11 is arranged between the two driving shafts 7. The arrangement of the two driving shafts 7 can make the rotary contact assembly 1 rotate more stably.

[0091] Further, in an embodiment provided by the application, the middle part of the movable contact 11 is recessed towards the central area of the movable contact 11 along the two sides in the width direction to form two avoidance areas for avoiding the two driving shafts 7, and the two driving shafts 7 passing through the support base 13 and the support cover 12 extend into the avoidance areas of the movable contact 11 and abut against the middle part of the movable contact 11, so as to drive the movable contact 11 to rotate together.

[0092] Further, the movable contact 11 provided by the embodiment includes two fixing shafts 142, and the two fixing shafts 142 are distributed along the length direction of the movable contact 11.

[0093] Preferably, the part of the drive shaft 7 extending out of the housing of the second switch unit 102 closest to the operating mechanism 104 is provided with a linkage mechanism. That is, the drive shaft 7 of the second switch unit 102 close to the operating mechanism 104 side can partially extend out of the housing, as part of the linkage mechanism, directly or indirectly connected with the operating mechanism 104, or the drive shaft 7 is directly or indirectly connected with the rotating contact assembly 1 of the first switch unit 101. Specifically, the operating mechanism 104 is connected with the rotating disc 103, and the operating mechanism 104 drives the rotating disc 103 to drive the drive shaft 7 to rotate, and the drive shaft 7 drives the plurality of rotating contact assemblies 1 to rotate, thereby completing the opening and closing of the plurality of second switch units 102, and improving the consistency of the opening and closing of the plurality of second switch units 102.

[0094] In the embodiment, the operating mechanism 104, the first switch unit 101 and the plurality of second switch units 102 are sequentially stacked, the operating mechanism 104 is connected with the rotating contact assembly 1 of the first switch unit 101 through the rotating disc 103, the rotating contact assembly 1 of the first switch unit 101 is connected with the drive shaft 7, and the plurality of second switch units 102 are driven to move synchronously through the drive shaft 7. Of course, the plurality of second switch units 102 can also be arranged above the first switch unit 101.

[0095] Further, the drive shaft 7 of the second switch unit 102 farthest from the operating mechanism 104 side can only pass through the rotating contact assembly 1 of the second switch unit 102, without penetrating the bottom of the housing.

[0096] Specifically, in the embodiment provided in the present application, the movable contact 11 partially extends out of the support seat 13 and the support cover 12 at both ends to overlap with the first fixed contact and the second fixed contact 2. After the movable contact 11 partially extends out of the support seat 13 and the support cover 12 at both ends, it has a certain activity space, which can improve the elasticity of the both ends of the movable contact 11 to some extent and enhance the clamping effect.

[0097] Specifically, as shown in Figure 2 The at least one first switch unit 101 and the plurality of second switch units 102 stacked in the present application can be linked and operated through the linkage mechanism. The first connecting part 23 of the second fixed contact 2 of each layer is arranged in a left-right staggered manner 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.

[0098] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings or the orientation or positional relationship commonly used in use, and are only for the convenience of description, and do not indicate that the device or element referred to must have a particular orientation, so it cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating relative importance.

[0099] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be considered as falling within the scope of protection of the present application.

Claims

1. A switching unit (100), comprising a housing, and a rotary contact assembly (1), a first stationary contact, a second stationary contact (2), and two arc-extinguishing grid groups (3) disposed on both sides of the rotary contact assembly (1), wherein the first stationary contact and the second stationary contact (2) are respectively disposed at intervals on both sides of the rotary contact assembly (1), and the first stationary contact, the second stationary contact (2), and the arc-extinguishing grid groups (3) are arranged crosswise, characterized in that, The first stationary contact and / or the second stationary contact (2) includes 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) cooperates with the moving contact (11) of the rotating contact assembly (1), and at least two first wiring portions (23) extend to the outside of the housing for electrical connection with the outside.

2. The switching unit according to claim 1, characterized in that, 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 connecting portion (22) 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 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) for limiting cooperation with the arc extinguishing grid plate group (3).

3. The switching unit according to claim 1, characterized in that, The rotating contact assembly (1) includes a support cover (12), a moving contact (11), and a support base (13) stacked in sequence. 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) arranged 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. A moving contact receiving groove (14) is provided between the support base (13) and the support cover (12). The moving contact (11) is disposed in the moving contact receiving groove (14).

4. The switching unit according to claim 3, characterized in that, 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. The two grooves (143) are through structures along the length of the moving contact (11). The middle parts 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 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).

5. The switching unit according to claim 3, characterized in that, 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. 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.

6. The switching unit according to claim 5, characterized in that, The first upper partition (51) and the first lower partition (52) are made of insulating gas-generating material.

7. The switching unit according to claim 5, 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).

8. The switching unit according to claim 7, characterized in that, The arc-shaped boss (531) is equipped with a magnet for blowing the electric arc into the corresponding arc-extinguishing grid plate group (3).

9. A disconnecting switch, comprising a stacked operating mechanism (104) and at least one switching unit (100), characterized in that, At least one of the switching units (100) is the switching unit (100) according to any one of claims 1-8.

10. The disconnecting switch according to claim 9, characterized in that, The disconnecting switch includes multiple switching units (100), wherein at least one switching unit (100) is a first switching unit (101) and at least one switching unit (100) is a second switching unit (102). The first switching unit (101) and the second switching unit (102) are stacked along the thickness direction of the switching unit (100). 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). 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).

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