Disconnecting switch under environment-friendly cabinet and environment-friendly cabinet

Abstract

The invention discloses an environment-friendly cabinet lower isolation switch, which comprises a rack and an isolation driving shaft in transmission connection with the rack, and one end of the isolation driving shaft is connected with an external driving source; the grounding busbar is connected with the ground; the isolation static contact is connected with an external circuit; a switch assembly is arranged between the grounding busbar and the isolation static contact and comprises a first movable contact rod connected to the outer wall of the isolation driving shaft, a first movable contact piece is fixed to the end of the first movable contact rod, and the first movable contact piece comprises a first connecting end connected to the end of the first movable contact rod. The first movable contact member is provided with a first extension end along the swing direction of the first movable contact rod, and the first extension end and the first connection end are both provided with first movable contacts, through the double-movable-contact separation design, the situation that a single movable contact bears closing and grounding potentials at the same time is avoided, mechanical friction and arc ablation are reduced, the conduction reliability is improved, and the service life is prolonged. And high-frequency operation requirements of the isolating switch are met.

Description

Technical Field

[0001] This application relates to the technical field of environmental protection cabinets, and in particular, to an isolating switch under an environmental protection cabinet and an environmental protection cabinet. Background Art

[0002] The three-position isolating switch is a key device in the power system to realize the on-off and grounding functions of the circuit. It is widely used in distribution devices such as ring main units. It realizes the switching of three working states through a mechanical structure: the closing position (connecting the main circuit), the opening position (disconnecting the main circuit), and the grounding position (grounding the circuit). As the core unit of the urban distribution network, the ring main unit often uses a three-position isolating switch to realize functions such as line isolation, safety grounding for maintenance, and fast on-off, so as to meet the requirements of efficient power supply and maintenance in a compact space.

[0003] The moving contact of the traditional three-position isolating switch usually adopts the structure of a single moving contact. The moving contact is driven by a rotating shaft to swing between the isolating static contact and the grounding busbar to complete the switching of different states. However, in such a design, since the moving contact needs to bear the connection of both closing and grounding potentials at the same time, and the isolating static contact and the grounding busbar share the moving contact on the same moving contact piece, when the moving contact is frequently switched between the isolating static contact and the grounding busbar for on-off, the moving contact is worn due to mechanical friction, and the contact surface is gradually oxidized or deformed, resulting in an increase in contact resistance and further exacerbating heating. At the same time, an arc will be generated when the current is disconnected. The high temperature of the arc (up to thousands of degrees Celsius) will directly ablate the contact material, resulting in surface melting, evaporation, and even ablation.

[0004] When the moving contact on the single moving contact piece is deformed due to arc ablation or mechanical wear during long-term use, after the surface of the moving contact is oxidized or deformed, the contact pressure between the moving contact and the isolating static contact will be insufficient, resulting in an increase in conduction resistance and a risk of overheating, and even reliable closing cannot be achieved. After the moving contact is ablated, the contact area with the grounding busbar is reduced, which may cause the grounding protection function to fail due to poor contact, threatening the safety of operators.

[0005] The isolating switch needs to maintain high reliability under high-frequency operation. In the prior art, a single moving contact is used to frequently switch between the closing and grounding potentials. When the moving contact is frequently switched, the cumulative ablation effect on the surface of the moving contact will be accelerated, shortening the service life of the moving contact, and thus it is difficult to meet the requirements of the intelligent distribution network for a long service life. Summary of the Invention

[0006] To ensure the reliability of the isolating switch during long-term use, an isolating switch under an environmental protection cabinet and an environmental protection cabinet are provided.

[0007] The above application objectives of this application are achieved through the following technical solutions: An environmentally friendly under-cabinet disconnector, including a frame, an isolation drive shaft drivingly connected to the frame, and one end of the isolation drive shaft is connected to an external drive source; it also includes a grounding bus connected to the ground and an isolation static contact connected to an external circuit. A switch assembly is provided between the grounding bus and the isolation static contact. The switch assembly includes a first moving contact rod connected to the outer wall of the isolation drive shaft. A first moving contact is fixed to the end of the first moving contact rod. The first moving contact includes a first connection end connected to the end of the first moving contact rod. The first moving contact has a first extension end in the swinging direction of the first moving contact rod. First moving contacts are provided on both the first extension end and the first connection end.

[0008] By adopting the above technical solution, the isolation drive shaft is driven by an external drive source to drive the switch assembly; the grounding bus is grounded and the isolation static contact is connected to the external circuit. The first moving contact has two first moving contacts at a certain angle. The two first moving contacts act on the isolation static contact and the grounding bus respectively. When the disconnector is operating at high frequency, it cooperates with the rotation of the isolation drive shaft to realize the switching between the closing position, the opening position and the grounding position, avoiding the situation where the traditional single moving contact bears the connection of two potentials of closing and grounding at the same time, reducing the mechanical friction and arc ablation of the moving contact, reducing the possibility of increased contact resistance, heating and oxidation deformation of the contact surface, improving the conduction reliability, ensuring the effectiveness of the grounding protection function, prolonging the service life of the moving contact, and meeting the requirements of the intelligent distribution network for long life.

[0009] Preferably, the switch assembly further includes a second moving contact rod connected to the outer wall of the isolation drive shaft. The second moving contact rod is parallel to the first moving contact rod in the opposite direction. A second moving contact is fixed to the end of the second moving contact rod. The second moving contact includes a second connection end connected to the end of the second moving contact rod. The second moving contact has a second extension end in the swinging direction of the second moving contact rod. Second moving contacts are provided on both the second extension end and the second connection end; the number of the isolation static contacts is two, and there are three groups of grounding static contacts on the grounding bus, and the number of grounding static contacts in the same group is two.

[0010] By adopting the above technical solution, when the isolation drive shaft drives the first moving contact rod and the second moving contact rod to swing, the first moving contact and the second moving contact can be respectively and synchronously connected to the grounding static contact and the isolation static contact, changing the single moving contact structure. Two moving contacts are used to bear the connection of two potentials of closing and grounding at the same time. The double moving contact rod design divides the current path into two independent loops, reducing the current density of a single moving contact, reducing the probability of arc generation and the degree of ablation; at the same time, the design of two moving contacts on each of the two moving contact rods reduces the local wear caused by uneven force, prolongs the service life of the moving contact, and meets the requirements of the intelligent distribution network for long life.

[0011] Preferably, the first extension end and the second connection end are parallel to each other in opposite directions, and the first connection end and the second extension end are parallel to each other in opposite directions.

[0012] By adopting the above technical solution, the layout of the first moving contact and the second moving contact can be optimized. When in the closing position, it can ensure that the first moving contact on the first connection end and the second moving contact on the second extension end are synchronously connected to the isolating static contact, and the second moving contact on the second connection end and the first moving contact on the first extension end are synchronously connected to the grounding static contact. Since the first extension end and the second extension end have a greater risk of deformation compared to the first connection end and the second connection end, the first connection end and the second connection end are arranged staggeredly, enhancing the reliability and stability of the circuit connection.

[0013] Preferably, both the first moving contact rod and the second moving contact rod are sleeved on the isolating drive shaft; further comprising an adjusting assembly, the adjusting assembly includes an adjusting seat fixed on the outer wall of the isolating drive shaft, and an adjusting pin is slidably arranged on the adjusting seat along the axial direction of the isolating drive shaft. First fixing holes and second fixing holes are respectively formed on the outer walls of the first moving contact rod and the second moving contact rod, and the adjusting pin is respectively inserted into the first fixing hole and the second fixing hole in a fitting manner.

[0014] By adopting the above technical solution, the adjusting pin on the adjusting seat is inserted into the fixing holes of the first moving contact rod and the second moving contact rod in a fitting manner, which is convenient for positioning and installing the first moving contact rod and the second moving contact rod on the isolating drive shaft. When the first moving contact or the second moving contact is ablated and damaged, the adjusting pin can be controlled to be pulled out from the first fixing hole and the second fixing hole, and then the first moving contact rod or the second moving contact rod can be moved to a position convenient for the operator to repair. At the same time, when the adjusting pin is controlled to be inserted into another normal first moving contact rod or second moving contact rod at this time, the switching between the closing and grounding positions can still be realized, so as to switch between the single moving contact rod and the double moving contact rod modes. In this way, in the case of urgent power demand, the single moving contact rod can be used in the short term, enhancing the applicability of the switch assembly.

[0015] Preferably, the adjusting assembly further includes a return spring arranged between the adjusting pin and the adjusting seat.

[0016] By adopting the above technical solution, a return spring is arranged between the adjusting pin and the adjusting seat. When adjusting, the adjusting pin is pulled towards the adjusting seat, and the return spring is compressed to store elastic potential energy. When the adjusting pin is inserted into the first fixing hole or the second fixing hole, relying on the elastic potential energy stored by the return spring, the rotation of the first moving contact rod or the second moving contact rod can be restricted, assisting the adjusting pin to realize the positioning and adjustment functions, ensuring the stable and accurate position of the first moving contact rod and the second moving contact rod on the isolating drive shaft, and improving the working reliability of the disconnector.

[0017] Preferably, a placing seat is arranged on the side of the isolating drive shaft facing away from the grounding busbar.

[0018] By adopting the above technical solution, when the first moving contact rod or the second moving contact rod is ablated and damaged, the adjusting pin can be pulled out from the first fixing hole or the second fixing hole, and the damaged first moving contact rod or the second moving contact rod can be placed on the placing seat, which is convenient for subsequent maintenance. Moreover, when using the single moving contact rod mode, the damaged moving contact rod will not affect the normal use of the other moving contact rod.

[0019] Preferably, limiting rings inserted into the first moving contact rod and the second moving contact rod are respectively fixed on the first connection end and the second connection end. A ring groove is formed on the outer wall of the limiting ring. A fixing member is rotatably connected inside the first moving contact rod and the second moving contact rod. The fixing member includes a limiting end and a handle end. A slot for inserting the limiting end is axially formed on the outer wall of the limiting ring along its own axis. The slot communicates with the ring groove, and the limiting end is inserted into the slot and fixed by rotating in the ring groove.

[0020] By adopting the above technical solution, the limiting rings on the first connection end and the second connection end are respectively inserted into the first moving contact rod and the second moving contact rod in a fitting manner, and the limiting end of the fixing member is inserted into the slot and fixed by rotating in the ring groove, so that the isolating moving contact and the grounding moving contact can be stably installed in the first moving contact rod and the second moving contact rod to prevent loosening; and the moving contact can be quickly disassembled and assembled by rotating and pulling out, improving the replacement efficiency of the moving contact.

[0021] Preferably, when pressing the handle end towards the direction of the isolating drive shaft, the limiting end presses and fixes the limiting ring in the ring groove inside the first moving contact rod and the second moving contact rod.

[0022] By adopting the above technical solution, when pressing the handle end towards the direction of the isolating drive shaft, the handle end takes the rotation connection point between the fixing member and the first moving contact rod or the second moving contact rod as the lever fulcrum, so that the limiting end can press and fix the limiting ring in the ring groove, firmly fixing the isolating moving contact and the grounding moving contact in the corresponding moving contact member, enhancing the fixing effect of the moving contact, improving the structural stability, and ensuring the reliable operation of the disconnecting switch.

[0023] An environmental protection cabinet includes a cabinet body, and the above-mentioned environmental protection cabinet lower disconnecting switch is arranged inside the cabinet body.

[0024] By adopting the above technical solution, the environmental protection cabinet can use the disconnecting switch to realize the functions of circuit on-off and grounding; by arranging independent first moving contact rod and second moving contact rod, two first moving contacts are arranged on the first moving contact rod, and two second moving contacts are arranged on the second moving contact rod, avoiding the same moving contact rod from undertaking two potential connections of closing and grounding, reducing the wear, oxidation and deformation of the moving contact, reducing the contact resistance, reducing the heat generation, preventing arc ablation, ensuring the reliable closing and grounding protection functions, improving the reliability and service life of the disconnecting switch, and meeting the requirements of high-efficiency power supply and maintenance of the environmental protection cabinet in a compact space.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. There are two moving contacts at a certain angle on the moving contact piece. The two moving contacts act on the isolating static contact and the grounding busbar respectively, avoiding the situation where a traditional single moving contact bears both closing and grounding potential connections at the same time, and reducing the mechanical friction and arc ablation of the moving contact; 2. The first moving contact rod and the second moving contact rod are separately arranged, changing the single moving contact piece structure. Two moving contact pieces bear the connections of both closing and grounding potentials at the same time, slowing down the cumulative ablation effect on the surface of the moving contact, extending the service life of the moving contact, and meeting the requirements of the intelligent distribution network for long life; 3. In case of urgent power demand, the moving contact piece on a single moving contact rod can be used to act on the isolating static contact and the grounding static contact in the short term, enhancing the applicability of the switch assembly; 4. The isolating moving contact and the grounding moving contact are stably installed in the first moving contact rod and the second moving contact rod, and the moving contact can be quickly disassembled and assembled by rotating and pulling out, improving the replacement efficiency of the moving contact and reducing the downtime of the environmental protection cabinet equipment. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 It is a schematic structural diagram of an isolating switch under an environmental protection cabinet; Figure 2 It is a schematic structural diagram of the first moving contact rod and the second moving contact rod; Figure 3 It is an exploded schematic diagram of the second moving contact rod; Figure 4 It is a sectional view of the second moving contact rod; Figure 5 It is an exploded schematic diagram of the adjusting assembly; Figure 6 It is a schematic structural diagram of the isolating switch in the environmental protection cabinet.

[0027] Reference numerals: 1, frame; 11, isolating drive shaft; 2, grounding busbar; 21, grounding static contact; 3, isolating static contact; 4, switch assembly; 41, first moving contact rod; 411, first moving contact piece; 412, first connection end; 413, first extension end; 414, first moving contact; 415, first fixing hole; 42, second moving contact rod; 421, second moving contact piece; 422, second connection end; 423, second extension end; 424, second moving contact; 425, second fixing hole; 5, adjusting assembly; 51, adjusting seat; 52, adjusting pin; 53, return spring; 54, adjusting rod; 6, placing seat; 7, limiting ring; 71, annular groove; 72, slot; 8, fixing member; 81, handle end; 82, limiting end; 9, cabinet body; 91, mounting bracket; 92, incoming line bushing; 93, outgoing line bushing. DETAILED DESCRIPTION OF THE INVENTION The following is a further detailed description with reference to the accompanying drawings: Example 1 As attached Figure 1 As shown, an isolating switch under an environmental protection cabinet includes a frame 1, an isolating drive shaft 11 and a switch assembly 4, wherein the isolating drive shaft 11 is connected to the frame 1 in a transmission manner, and one end of the isolating drive shaft 11 is connected to an external drive source. Before the external drive source is started, a certain angle range is set, and thus it can only synchronously drive the isolating drive shaft 11 to rotate within this angle range.

[0029] There are three groups of switch components 4. The switch components 4 cooperate with the isolation drive shaft 11. The rotation of the isolation drive shaft 11 can realize the switching of different work positions, thereby achieving the effect of accurately controlling the on / off and grounding of the circuit.

[0030] An environmental protection cabinet under-isolating switch includes a grounding bus 2 and an isolating static contact 3. The grounding bus 2 is located on one side of the isolating drive shaft 11. The grounding bus 2 is in the shape of a long plate. Three groups of grounding static contacts 21 are respectively provided on the grounding bus 2. Each group consists of two relatively parallel grounding static contacts 21, and one end of the grounding bus 2 is connected to the ground. The grounding bus 2 is generally made of a metal material with good conductive properties, such as a copper bus. High-purity red copper can be selected. This type of copper has low resistance and can ensure a good grounding effect.

[0031] The isolating static contact 3 is located above the frame 1. The three groups of isolating static contacts 3 are relatively parallel. There are two relatively parallel isolating static contacts 3 in the same group. The isolating static contact 3 is in the shape of a sheet. The upper end of the isolating static contact 3 is connected to the external circuit, and the lower end of the isolating static contact 3 faces the isolation drive shaft 11. The isolating static contact 3 also needs to have high conductivity and corrosion resistance. It is common to use stainless steel material, or the surface can be silver-plated to enhance conductivity. In the same group of switch components 4, the number of isolating static contacts 3 is set to two, and the two isolating static contacts 3 in the same group are connected facing each other.

[0032] As attached Figure 1 and attached Figure 2 As shown, a switch assembly 4 is provided between the isolating static contact 3 and the grounding bus 2 . The switch assembly 4 includes a first moving contact rod 41 and a second moving contact rod 42 connected to the isolating drive shaft 11 .

[0033] The shape of the first moving contact rod 41 is a long rod shape. The outer wall of the first moving contact rod 41 is made of insulating material to isolate the arc. One end of the first moving contact rod 41 is sleeved on the outer wall of the isolation drive shaft 11. A first moving contact 411 is provided at the other end of the first moving contact rod 41. The shape of the first moving contact 411 is an arc-shaped sheet, and the arc of the first moving contact 411 coincides with the swinging path of the first moving contact 411 with the isolation drive shaft 11 as the axis. The first moving contact 411 includes a first connection end 412 connected to the end of the first moving contact rod 41. A first extension end 413 is provided on the first moving contact 411 along the swinging direction of the first moving contact rod 41. First moving contacts 414 are provided on both the first extension end 413 and the first connection end 412.

[0034] The shape of the second moving contact rod 42 is a long rod shape. The second moving contact rod is parallel to the first moving contact rod 41 in an opposite direction. The outer wall of the second moving contact rod 42 is made of insulating material to isolate the arc. One end of the second moving contact rod 42 is sleeved on the outer wall of the isolation drive shaft 11. A second moving contact 421 is provided at the other end of the second moving contact rod 42. The shape of the second moving contact 421 is an arc-shaped sheet, and the arc of the second moving contact 421 coincides with the swinging path of the second moving contact 421 with the isolation drive shaft 11 as the axis. The second moving contact 421 includes a second connection end 422 connected to the end of the second moving contact rod 42. A second extension end 423 is provided on the second moving contact 421 along the swinging direction of the second moving contact rod 42. Second moving contacts 424 are provided on both the second extension end 423 and the second connection end 422.

[0035] The shapes of the first moving contact 414 and the second moving contact 424 are designed to be flat here for good contact with the corresponding static contacts. They are made of copper alloy here, which not only ensures conductivity but also has a certain strength.

[0036] The isolation drive shaft 11 can drive the second moving contact rod 42 and the first moving contact rod 41 to swing synchronously. The first extension end 413 and the second connection end 422 are parallel to each other in an opposite direction. The first connection end 412 and the second extension end 423 are parallel to each other in an opposite direction. There are a closing position, a tripping position and a grounding position on the path of the isolation drive shaft 11 rotating to drive the first moving contact rod 41 and the second moving contact rod 42. At the closing position, the first moving contact 414 on the first connection end 412 and the second moving contact 424 on the second extension end 423 are connected to the isolation static contact 3 synchronously. At the grounding position, the second moving contact 424 on the second connection end 422 and the first moving contact 414 on the first extension end 413 are connected to the grounding static contact 21 synchronously; because the first extension end 413 and the second extension end 423 have a greater risk of deformation compared with the first connection end 412 and the second connection end 422, the first connection end 412 and the second connection end 422 are arranged staggeredly, enhancing the reliability and stability of the circuit connection.

[0037] When in the closing position, the isolation drive shaft 11 drives the first connection end 412 and the second extension end 423 to trigger the isolation static contact 3, and the trigger angle here is preferably set to 35°. When in the grounding position, the isolation drive shaft 11 drives the second connection end 422 and the first extension end 413 to trigger the isolation static contact 3, and the trigger angle here is preferably set to 35°. In the opening position and under the above preferred angle, the included angle between the first moving contact rod 41 and the second moving contact rod 42 is preferably set to 20°. There is a safe distance between the moving contact and the static contact, and there will be no arc connection due to the too small distance between them. The trigger angle can be adjusted according to the actual experimental situation.

[0038] As shown in the Figure 2 and Figure 3 figure, limiting rings 7 that fit and insert into the first moving contact rod 41 and the second moving contact rod 42 are respectively fixed on the first connection end 412 and the second connection end 422. The limiting rings 7 are generally made of hard materials, and their outer diameters match the inner diameters of the first moving contact rod 41 and the second moving contact rod 42, and can be tightly inserted therein. A ring groove 71 is opened on the outer wall of one end of the limiting ring 7 inserted into the first moving contact rod 41 or the second moving contact rod 42, and a slot 72 communicating with the ring groove 71 is axially opened on the outer wall of this end, and the number of the slots 72 is two.

[0039] A fixing member 8 is also rotatably connected to the inner walls of the first moving contact rod 41 and the second moving contact rod 42 at one end where the limiting ring 7 is located. The fixing member 8 can be made of metal and has certain strength and wear resistance. The fixing member 8 includes a handle end 81 located outside the first moving contact rod 41 or the second moving contact rod 42, and a limiting end 82 located inside the first moving contact rod 41 or the second moving contact rod 42. When installing the moving contact, first insert the limiting end 82 into the slot 72, and the limiting end 82 will be embedded in the ring groove 71 through the slot 72. Then rotate the moving contact to slide the limiting end 82 along the radial direction of the limiting ring 7 in the ring groove 71. The cooperation between the limiting end 82 and the ring groove 71 realizes the locking of the moving contact in the axial direction.

[0040] As shown in the Figure 3 and Figure 4As shown, the shape of the handle end 81 is arc-shaped, and the material of the handle end 81 is an insulating material, which can insulate the electric arc to ensure safety. Press the handle end 81 in the direction towards the isolation drive shaft 11. The handle end 81 will use the rotation connection point of the fixed part 8 and the moving contact rod as the lever fulcrum. Furthermore, the handle end 81 will synchronously drive the limiting end 82 to press against the annular groove 71, realizing the locking of the moving contact in the radial and axial directions. This fixing method is convenient to operate. Just pressing the handle end 81 can fix and release the limiting ring 7. When it is necessary to replace or adjust the isolation moving contact or the grounding moving contact, press the handle end 81 to make the limiting end 82 withdraw from the annular groove 71, and then the limiting ring 7 and the moving contact can be easily removed, facilitating the operator to replace the ablated and damaged moving contact faster, thereby improving the maintenance efficiency of the operator for maintaining and repairing the environmental protection cabinet.

[0041] As shown in the appendix Figure 1 and the appendix Figure 5 As shown, an isolating switch at the lower part of an environmental protection cabinet further includes an adjusting component 5. There are three groups of adjusting components 5, and the three groups of adjustments are respectively located on one side of the three groups of switch components 4. The adjusting component 5 is used to adjust the positions of the first moving contact rod 41 and the second moving contact rod 42. The adjusting component 5 includes an adjusting seat 51 fixed on the outer wall of the isolation drive shaft 11. The adjusting seat 51 is generally fixed on the isolation drive shaft 11 by welding or bolt connection. It can be an annular structure surrounding the isolation drive shaft 11.

[0042] An adjusting pin 52 sliding along the axis direction of the isolation drive shaft 11 is slidably connected to the adjusting seat 51. The adjusting pin 52 is usually a cylindrical metal rod, and its surface needs to be smoothed to reduce friction with other components. First fixing holes 415 and second fixing holes 425 are respectively formed on the outer walls of the first moving contact rod 41 and the second moving contact rod 42. The number of adjusting pins 52 is two, and the two adjusting pins 52 are respectively inserted into the first fixing hole 415 and the second fixing hole 425 in a fitting manner. A clearance fit is adopted between the adjusting pin 52 and the first fixing hole 415 or between the adjusting pin 52 and the second fixing hole 425. In this way, it not only ensures that the adjusting pin 52 can be smoothly inserted, but also plays a role in positioning and guiding during adjustment. When it is necessary to adjust the position of the first moving contact rod 41 or the second moving contact rod 42, it can be achieved by pushing the adjusting pin 52 to slide.

[0043] The adjusting component 5 further includes a return spring 53 arranged between the adjusting pin 52 and the adjusting seat 51. The return spring 53 generally adopts a spiral spring. When the adjusting pin 52 is pushed, the return spring 53 can make it automatically return to the initial position, ensuring that the isolating switch can work normally during the next operation. The elastic coefficient of the return spring 53 needs to be selected according to the actual operating force and adjustment requirements to ensure the smooth and reliable adjustment process.

[0044] The adjusting assembly 5 further includes an adjusting rod 54. One end of the adjusting rod 54 is fixed to the ends of the two adjusting pins 52, and the other end of the adjusting rod 54 passes through the adjusting seat 51. When it is necessary to adjust and push the adjusting pins 52 to insert into or pull out of the first fixing hole 415, only the upper end of the adjusting rod 54 needs to be pulled to synchronously drive the adjusting pins 52 to slide within the adjusting seat 51, thereby facilitating the operator to adjust the positions of the first moving contact rod 41 or the second moving contact rod 42.

[0045] As shown in the Figure 6 accompanying drawings, a placing seat 6 is provided on one side of the switch assembly 4. The placing seat 6 is aligned with the switch assembly 4 respectively. The shape of the placing seat 6 is plate-shaped. When the first moving contact rod 41 or the second moving contact rod 42 is ablated and damaged, the adjusting rod 54 can be pulled to synchronously drive the adjusting pins 52 to be pulled out of the first fixing hole 415 and the second fixing hole 425, and then the damaged moving contact part can be placed on the placing seat 6, which is convenient for subsequent operators to repair it, improving the repair efficiency of the operator. And when a damaged moving contact part is placed on the placing seat 6, in the single moving contact rod mode, the damaged moving contact rod will not affect the normal use of the other moving contact rod.

[0046] The implementation principle of the first embodiment is as follows: The first moving contact rod 41 and the second moving contact rod 42 are driven by the isolation drive shaft 11 to switch between different working positions, realizing the on-off and grounding functions of the circuit. The double moving contact rod structure is adopted, and the double moving contact structure is adopted on the moving contact part, avoiding the wear and ablation problems caused by the frequent switching of a single moving contact rod or a single moving contact, prolonging the service life of the contact. The setting of the adjusting assembly 5 can realize the switching of the disconnecting switch between the single moving contact rod and the double moving contact rod working modes, thereby increasing the applicability of the disconnecting switch. Compared with the traditional disconnecting switch, there is a significant improvement in performance and reliability, and it can better meet the requirements of the intelligent distribution network for long life and high reliability.

[0047] Embodiment Two As shown in the Figure 6 accompanying drawings, an environmental protection cabinet provided in the second embodiment of the present application. The inside of the environmental protection cabinet is provided with the disconnecting switch in the first embodiment above. The cabinet body 9 of the environmental protection cabinet is generally made of metal material, such as steel plate, with good strength and protection performance.

[0048] An installation bracket 91 is arranged inside the cabinet body 9 for fixing the disconnecting switch. The installation bracket 91 is fixed inside the cabinet body 9 by bolts or welding, and its shape and size are designed according to the outer shape of the disconnecting switch to ensure that the disconnecting switch can be stably installed inside the environmental protection cabinet.

[0049] Inside the cabinet body 9, there are also an incoming line bushing 92 and an outgoing line bushing 93. The number of incoming line bushings 92 is three, and the three incoming line bushings 92 are respectively located above the three groups of switch components 4. The incoming line bushing 92 is electrically connected to the isolating static contact 3 through the internal connecting wire thereof; the outgoing line bushing 93 is located at the bottom of the environmental protection cabinet. The number of outgoing line bushings 93 is three, and the three outgoing line bushings 93 are electrically connected to the isolating drive shaft 11 through the connecting wire.

[0050] The implementation principle of the second embodiment is as follows: By arranging the disconnecting switch inside the environmental protection cabinet and utilizing the high reliability and long service life characteristics of the disconnecting switch, the power supply stability and safety of the environmental protection cabinet can be effectively improved. The precise position switching function of the disconnecting switch can realize line isolation, safety grounding for maintenance, and quick opening and closing, meeting the requirements of high-efficiency power supply and maintenance of the environmental protection cabinet in a compact space.

[0051] This specific embodiment is only an interpretation of the present application and does not limit the present application. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope protected by the present application, it is protected by the patent law.

Claims

1. An environmentally friendly under-cabinet disconnector, comprising a frame (1), characterized in that, It includes an isolation drive shaft (11) drivingly connected to a frame (1), and one end of the isolation drive shaft (11) is connected to an external drive source; it also includes a grounding busbar (2) connected to the ground, and an isolation static contact (3) connected to an external circuit; A switch assembly (4) is provided between the grounding busbar (2) and the isolation static contact (3). The switch assembly (4) includes a first moving contact rod (41) connected to the outer wall of the isolation drive shaft (11). A first moving contact piece (411) is fixed to the end of the first moving contact rod (41). The first moving contact piece (411) includes a first connection end (412) connected to the end of the first moving contact rod (41). A first extension end (413) is provided on the first moving contact piece (411) along the swinging direction of the first moving contact rod (41). First moving contacts (414) are provided on both the first extension end (413) and the first connection end (412).

2. The environmentally friendly cabinet disconnector according to claim 1, characterized in that, The switch assembly (4) further includes a second moving contact rod (42) connected to the outer wall of the isolation drive shaft (11). The second moving contact rod (42) is parallel to the first moving contact rod (41) in an opposite direction. A second moving contact piece (421) is fixed to the end of the second moving contact rod (42). The second moving contact piece (421) includes a second connection end (422) connected to the end of the second moving contact rod (42). A second extension end (423) is provided on the second moving contact piece (421) along the swinging direction of the second moving contact rod (42). Second moving contacts (424) are provided on both the second extension end (423) and the second connection end (422). The number of the isolation static contacts (3) is two, and three groups of grounding static contacts (21) are provided on the grounding busbar (2), and the number of the grounding static contacts (21) in the same group is two.

3. The environmentally friendly cabinet disconnector according to claim 2, characterized in that, The first extension end (413) is parallel to the second connection end (422) in an opposite direction, and the first connection end (412) is parallel to the second extension end (423) in an opposite direction.

4. An environmental protection cabinet lower disconnector according to claim 2, characterized in that, Both the first moving contact rod (41) and the second moving contact rod (42) are sleeved on the isolation drive shaft (11); it further includes an adjusting assembly (5). The adjusting assembly (5) includes an adjusting seat (51) fixed to the outer wall of the isolation drive shaft (11). An adjusting pin (52) is slidably provided on the adjusting seat (51) along the axial direction of the isolation drive shaft (11). First fixing holes (415) and second fixing holes (425) are respectively formed on the outer walls of the first moving contact rod (41) and the second moving contact rod (42), and the adjusting pin (52) is respectively fitted and inserted into the first fixing hole (415) and the second fixing hole (425).

5. An environmental protection cabinet lower disconnector according to claim 4, characterized in that, The adjusting assembly (5) further includes a return spring (53) provided between the adjusting pin (52) and the adjusting seat (51).

6. The environmentally friendly cabinet disconnect switch according to claim 4, characterized in that, A placing seat (6) is provided on the side of the isolation drive shaft (11) facing away from the grounding busbar (2).

7. An isolator under an environmental protection cabinet according to claim 4, characterized in that, A limiting ring (7) inserted into the first moving contact rod (41) and the second moving contact rod (42) is respectively fixed on the first connection end (412) and the second connection end (422). A ring groove (71) is formed on the outer wall of the limiting ring (7). A fixing member (8) is rotatably connected inside the first moving contact rod (41) and the second moving contact rod (42). The fixing member (8) includes a limiting end (82) and a handle end (81). A slot (72) for inserting the limiting end (82) is axially formed on the outer wall of the limiting ring (7). The slot (72) communicates with the ring groove (71), and the limiting end (82) is inserted into the slot (72) and fixed by rotating in the ring groove (71).

8. An environmental protection cabinet disconnector according to claim 7, characterized in that, Press the handle end (81) in the direction towards the isolation drive shaft (11), and the limiting end (82) presses and fixes the limiting ring (7) in the first moving contact rod (41) and the second moving contact rod (42) within the ring groove (71).

9. An environmentally friendly cabinet, characterized in that, It includes a cabinet body (9), and an environmental protection cabinet lower isolating switch according to any one of claims 1 to 8 is arranged inside the cabinet body (9).

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