A dual power supply isolating switch with leakage protection in underground mines

Abstract

The present invention belongs to the technical field of electrical switches, and in particular, relates to an underground dual-power isolating switch with leakage protection, comprising a mounting seat, a controller is mounted on the front side of the mounting seat, a knob for switching power is rotatably plugged into the front side of the controller, switch bodies are symmetrically arranged on both sides of the controller, a plurality of wiring holes are provided on the top and bottom of the switch body, and wiring posts are fixedly installed in the wiring holes. The present invention is provided with a connection component, and in the whole process of switching power levels, the knob on the controller can not only realize the switching operation of the power supply, but also when one power supply is used, the incoming and outgoing lines on the other power supply can be cut off from the connection operation with the corresponding switch body as the connecting ring in the corresponding switch body rotates, thereby avoiding leakage caused by a humid environment, and greatly increasing the safety of the use of electricity by the electric explosion-proof rubber-wheeled vehicle underground after switching the power supply.

Description

Technical Field

[0001] The invention belongs to the technical field of electrical switches, and in particular relates to an underground dual-power isolating switch with leakage protection. Background Art

[0002] Explosion-proof rubber-tyred trackless vehicles in coal mines have the advantages of flexible operation and high transportation efficiency, and are widely used in major domestic mining areas. With the development of electric vehicle technology and the increasing requirements for energy conservation and emission reduction in coal mines, various new pure electric explosion-proof rubber-tyred trackless vehicles with explosion-proof batteries as power sources have emerged. With their low noise and zero pollution characteristics, they have gradually begun to replace traditional diesel engine explosion-proof rubber-tyred trackless vehicles. However, due to the requirements of mine safety regulations and the development of chemical battery technology, electric explosion-proof rubber-tyred trackless vehicles use electrical components such as motors and batteries that need to be explosion-proofed. The weight of the components after explosion-proof treatment is greatly increased, which makes the specific energy of the explosion-proof battery low, resulting in a serious lack of vehicle range. Therefore, the vehicle needs to be frequently lifted to the well for charging, which seriously restricts the working efficiency of the electric explosion-proof rubber-tyred vehicle and cannot fully meet the needs of continuous operation underground.

[0003] In order to solve this problem, the existing electric explosion-proof rubber-wheeled vehicles are generally equipped with a dual power supply structure, which uses ground clean energy to generate electricity to replace electricity, and researches and develops key technologies for intelligent charging and replacement of ground photovoltaic and underground power supply dual power supplies to meet the energy replenishment needs of underground electric vehicles, solve the problem of insufficient cruising range of electric explosion-proof rubber-wheeled vehicles, and improve vehicle utilization. When using dual power supplies for power supply, a dual power supply isolation switch is generally used to control and switch the dual power supplies. However, due to the relatively humid underground environment, it is difficult to ensure that when switching power supplies, the other power supply will not leak due to the humid environment, and thus the safety of the electric explosion-proof rubber-wheeled vehicle cannot be guaranteed.

[0004] Therefore, it is necessary to invent a dual-power isolating switch with leakage protection underground to solve the above problems. Summary of the invention

[0005] In view of the above problems, the present invention provides an underground dual-power isolating switch with leakage protection to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A dual-power isolating switch with leakage protection in underground mines comprises a mounting seat, a controller is mounted on the front side of the mounting seat, a knob for switching power is rotatably plugged on the front side of the controller, switch bodies are symmetrically arranged on both sides of the controller, a plurality of wiring holes are provided on the top and bottom of the switch body, a terminal is fixedly installed in the wiring hole, two connecting grooves are horizontally arranged on the front side of the switch body, the two connecting grooves are respectively opposite to the areas where the plurality of wiring holes are located on the top and bottom of the switch body, a connecting hole is penetrated and opened at the position opposite to the wiring hole of the connecting groove, and the connecting hole is communicated with the corresponding wiring hole, a connecting component is arranged at the position opposite to the connecting hole in the connecting groove, a driving component for driving the connecting component to move is arranged inside the controller, metal connecting blocks are arranged on the top and bottom of the connecting component, one of the metal connecting blocks is inserted into the corresponding connecting hole and fixedly connected to the corresponding terminal, the other metal connecting block is fixedly connected to the wall of the connecting groove on the corresponding side and electrically connected to the circuit element inside the switch body, a protective cover is installed on the front side of the switch body, and the two connecting grooves are both located on the inner side of the protective cover.

[0008] Furthermore, the connecting assembly includes a connecting ring, which is divided into two completely identical metal segments and two insulating segments, and the outer side of the connecting ring is kept in contact with the corresponding two metal connecting blocks, the two metal segments and the two insulating segments are distributed alternately, and a metal rod is fixedly connected between the opposite sides of the two metal segments, and an insulating rotating shaft is vertically inserted between the front and rear sides of the middle of the metal rod, the rear end of the rotating shaft is vertically rotatably connected to the rear side groove wall of the connecting groove, the front end of the rotating shaft is rotatably connected to a fixed block, the fixed block is fixedly connected to the groove wall of the connecting groove close to the connecting hole, and a transmission gear is fixedly sleeved on the position of the rotating shaft close to the front end.

[0009] Furthermore, the driving assembly includes a rack, and the teeth on the rack are meshed with multiple transmission gears, a U-shaped plate is fixedly connected between the front sides of the racks in the two connecting grooves, a limiting slide groove is provided on the front side of the switch body, and the U-shaped plate is fixedly connected to a limiting slider at a position relative to the limiting slide groove, and the limiting slider is slidably installed in the limiting slide groove, a pull rod is fixedly connected to the side of the U-shaped plate close to the controller, and the pull rods on the two U-shaped plates are rotationally symmetrical about the knob, a notch is provided through the side of the protective cover close to the controller at a position relative to the pull rod, and the pull rod is inserted into the notch, and a part of the knob located in the controller is fixedly sleeved with a missing gear, a circular gear groove is provided inside the controller at a position relative to the missing gear, and the missing gear is located in the gear groove, slots are provided at the positions of the gear groove relative to the free ends of the two pull rods, and the two pull rods are respectively slidably inserted in the two slots, a section of teeth is evenly distributed on the side of the pull rod opposite to the missing gear, and the teeth can mesh with the missing gear.

[0010] Furthermore, the knob controls two power gears and a neutral gear, the neutral gear is symmetrically distributed between the two power gears, and the two power gears are respectively opposite to the two switch bodies. In the initial state, the knob is opposite to the neutral gear, and at this time, the two insulating sections on the connecting rings in the two switch bodies are respectively opposite to the corresponding metal connecting blocks. When the knob is opposite to one of the power gears, the metal section of the connecting ring in the switch body corresponding to the power gear is electrically connected to the corresponding two metal connecting blocks, while the insulating section on the connecting ring in the other switch body is opposite to the corresponding two metal connecting blocks.

[0011] Furthermore, the side of the metal connecting block opposite to the connecting ring is designed with an arc surface, and the arc surface can perfectly fit together with the surface of the connecting ring. A groove is provided on the side of the metal connecting block opposite to the connecting block, and a metal movable block is slidably inserted in the groove, and the end of the movable block close to the connecting ring is also designed with an arc surface, and the center of the arc surface of the movable block coincides with the center of the arc surface of the metal connecting block. A metal telescopic rod is fixedly connected to the side of the movable block away from the connecting ring, and one end of the telescopic rod away from the movable block is fixedly connected to the groove wall corresponding to the side of the groove, and a compression spring is sleeved on the telescopic rod, and the two ends of the compression spring are respectively fixedly connected to the movable block and the inner wall of the groove.

[0012] Furthermore, the switch body and the controller can be detachably mounted on the mounting base, and the two are electrically connected together.

[0013] Furthermore, the toothed portion on the missing gear is distributed in half with the toothed portion, and when the toothed portion of the missing gear is engaged with the teeth on one of the pull rods, the toothed portion of the missing gear can be opposite to the teeth on the other pull rod.

[0014] Furthermore, balls are evenly installed on the rear side of the limiting sliding block, and the balls can fit with the inner wall of the limiting sliding groove.

[0015] Furthermore, a support bar is fixedly connected to a side of the rack away from the transmission gear, a strip groove is provided on a groove wall on a side of the connecting groove opposite to the support bar, and the support bar is slidably installed in the strip groove.

[0016] Furthermore, a plurality of receiving grooves are evenly arranged on the outer side of the insulating section of the connecting ring, and friction strips are fixedly connected in the receiving grooves, and the friction strips are flush with the outer side of the insulating section of the connecting ring.

[0017] Technical effects and advantages of the present invention:

[0018] 1. The present invention is provided with a connection assembly. During the whole process of switching the power levels, the knob on the controller not only realizes the switching operation of the power source, but also, when one power source is used, the incoming and outgoing lines on the other power source can be cut off from the connection operation with the corresponding switch body as the connecting ring in the corresponding switch body rotates, thereby avoiding leakage caused by a humid environment and greatly increasing the safety of electricity use of the electric explosion-proof rubber-wheeled vehicle in the mine after switching the power source;

[0019] 2. The present invention is provided with a movable block. When the connecting ring is fitted with two opposite metal connecting blocks, the two movable blocks can be fitted with the metal section of the connecting ring under the action of the corresponding compression springs, thereby ensuring a stable electrical connection between the metal connecting block and the connecting ring. In addition, the movable block can generate pressure on the connecting ring under the pushing action of the compression spring. Therefore, when the teeth of the pull rod are not meshed with the teeth on the missing gear, the pressure generated by the movable block on the connecting ring can also ensure the stability of the static state of the connecting ring.

[0020] 3. The present invention is provided with a support bar. When the rack drives the transmission gear to rotate, the support bar can slide along the bar groove and provide support force for the rack from the side of the rack away from the transmission gear, thereby ensuring that the rack and the transmission gear can be stably meshed together;

[0021] 4. By providing a friction strip, during the rotation of the connecting ring, the friction strip can grind the metal connecting block and the side of the movable block opposite to the connecting ring, thereby preventing the metal connecting block and the movable block from being oxidized due to long-term friction, and ensuring that the metal segment of the connecting ring maintains a stable electrical connection with the metal connecting block and the movable block. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a three-dimensional schematic diagram of all structures except the protective cover in the present invention;

[0024] Figure 3 is a three-dimensional cross-sectional view of the controller in the present invention;

[0025] Figure 4 It is a three-dimensional schematic diagram of the switch body, the terminal and the connection assembly in the present invention;

[0026] Figure 5 It is a three-dimensional schematic diagram of some driving components, balls and support bars in the present invention;

[0027] Figure 6 It is a three-dimensional schematic diagram of the connecting assembly, the rack and the support bar in the present invention;

[0028] Figure 7 is a three-dimensional cross-sectional view of the terminal and the metal connecting block in the present invention;

[0029] Figure 8 It is a three-dimensional schematic diagram of the knob and the missing gear in the present invention.

[0030] In the figure: 1. mounting base; 2. controller; 3. knob; 4. switch body; 5. terminal; 6. connecting groove; 7. connecting hole; 8. connecting assembly; 81. connecting ring; 811. metal section; 812. insulating section; 82. metal rod; 83. rotating shaft; 84. fixing block; 85. transmission gear; 9. driving assembly; 91. rack; 92. U-shaped plate; 93. limiting slide groove; 94. limiting slider; 95. pull rod; 96. missing gear; 97. gear groove; 98. slot; 10. metal connecting block; 11. protective cover; 12. power gear; 13. neutral gear; 14. movable block; 15. telescopic rod; 16. compression spring; 17. ball; 18. support bar; 19. strip groove; 20. friction strip. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0032] The present invention provides Figures 1 to 8 The dual-power isolating switch with leakage protection for underground mines shown in the figure comprises a mounting base 1, a controller 2 is mounted on the front side of the mounting base 1, a knob 3 for switching power is rotatably plugged into the front side of the controller 2, switch bodies 4 are symmetrically arranged on both sides of the controller 2, a plurality of wiring holes are provided on the top and bottom of the switch body 4, a wiring post 5 is fixedly installed in the wiring hole, two connecting grooves 6 are horizontally provided on the front side of the switch body 4, the two connecting grooves 6 are respectively opposite to the areas where the plurality of wiring holes are located at the top and bottom of the switch body 4, a connecting hole 7 is provided through the position of the connecting groove 6 opposite to the wiring hole, and the connecting hole 7 is connected to the corresponding wiring hole, and the connecting groove 6 has a plurality of wiring holes. A connection component 8 is provided at a position opposite to the connection hole 7, a driving component 9 for driving the connection component 8 to move is provided inside the controller 2, metal connection blocks 10 are provided at the top and bottom of the connection component 8, one of the metal connection blocks 10 is inserted into the corresponding connection hole 7 and fixedly connected to the corresponding terminal 5, and the other metal connection block 10 is fixedly connected to the groove wall of the connection groove 6 on the corresponding side and is electrically connected to the circuit elements inside the switch body 4, a protective cover 11 is installed on the front side of the switch body 4, and the two connection grooves 6 are both located on the inner side of the protective cover 11, the switch body 4 and the controller 2 can be detachably installed on the mounting base 1, and the two are electrically connected together;

[0033] The knob 3 controls two power levels 12 and a neutral level 13, and the neutral level 13 is symmetrically distributed between the two power levels 12, and the two power levels 12 are respectively opposite to the two switch bodies 4. In the initial state, the knob 3 is opposite to the neutral level 13, and at this time, the two insulating segments 812 on the connecting ring 81 in the two switch bodies 4 are respectively opposite to the corresponding metal connecting blocks 10. When the knob 3 is opposite to one of the power levels 12, the metal segment 811 of the connecting ring 81 in the switch body 4 corresponding to the power level 12 is electrically connected to the corresponding two metal connecting blocks 10, and the insulating segment 812 on the connecting ring 81 in the other switch body 4 is opposite to the corresponding two metal connecting blocks 10;

[0034] When in use, the input and output lines of the two power sources are connected to the corresponding connection posts on the two switch bodies 4, and when the knob 3 is in the neutral position 13, the connection components 8 in the two switch bodies 4 can disconnect the electrical connection between the two opposite metal connection blocks 10, thereby avoiding leakage when not in use;

[0035] When switching the power level 12 by means of the knob 3, the knob 3 is twisted in the direction of the power level 12 of the corresponding power source, and as the knob 3 is twisted, the connecting component 8 in the corresponding switch body 4 can be rotated under the drive of the driving component 9, so that the two opposite metal connecting blocks 10 can gradually be electrically connected through the connecting component 8, and in this process, the connecting component 8 in the other switch body 4 can remain stationary, so that the incoming and outgoing lines of the power source that is not switched can be disconnected from the switch body 4, thereby avoiding leakage caused by a humid environment, and greatly increasing the safety of electricity use of the electric explosion-proof rubber-wheeled vehicle underground after switching the power source.

[0036] like Figures 2 to 8 As shown, the connecting assembly 8 includes a connecting ring 81, which is divided into two completely identical metal segments 811 and two insulating segments 812, and the outer side of the connecting ring 81 is kept in contact with the corresponding two metal connecting blocks 10, the two metal segments 811 and the two insulating segments 812 are alternately distributed, and a metal rod 82 is fixedly connected between the two opposite sides of the two metal segments 811, and an insulating rotating shaft 83 is vertically inserted and inserted between the front and rear sides of the middle of the metal rod 82, and the rear end of the rotating shaft 83 is vertically rotatably connected to the rear side groove wall of the connecting groove 6, and the front end of the rotating shaft 83 is rotatably connected to a fixed block 84, and the fixed block 84 is fixedly connected to the groove wall of the connecting groove 6 near the connecting hole 7, and a transmission gear 85 is fixedly sleeved at a position near the front end of the rotating shaft 83;

[0037] The driving assembly 9 includes a rack 91, and the teeth on the rack 91 are meshed with multiple transmission gears 85. A U-shaped plate 92 is fixedly connected between the front sides of the racks 91 in the two connecting grooves 6. A limiting slide groove 93 is provided on the front side of the switch body 4. A limiting slider 94 is fixedly connected to the position of the U-shaped plate 92 relative to the limiting slide groove 93. The limiting slider 94 is slidably installed in the limiting slide groove 93. A pull rod 95 is fixedly connected to the side of the U-shaped plate 92 close to the controller 2, and the pull rods 95 on the two U-shaped plates 92 are rotationally symmetrical about the knob 3. A notch is penetrated at the position of the protective cover 11 close to the controller 2 and opposite to the pull rod 95, and the pull rod 95 is inserted in the notch. A missing gear 96 is fixedly sleeved in the part inside the controller 2, a circular gear groove 97 is provided in the position opposite to the missing gear 96 inside the controller 2, and the missing gear 96 is located in the gear groove 97, and slots 98 are provided in the positions opposite to the free ends of the two pull rods 95, and the two pull rods 95 are respectively slidably inserted in the two slots 98, a section of teeth is evenly distributed on the side of the pull rod 95 opposite to the missing gear 96, and the teeth can mesh with the missing gear 96, the teeth part on the missing gear 96 and the missing teeth part are distributed in half, and when the teeth part of the missing gear 96 meshes with the teeth on one of the pull rods 95, the missing teeth part of the missing gear 96 can be opposite to the teeth on the other pull rod 95;

[0038] In the initial state, the knob 3 is opposite to the neutral position 13. At this time, the two insulating sections 812 on the connecting rings 81 in the two switch bodies 4 are respectively opposite to the corresponding metal connecting blocks 10. When switching gears, as the knob 3 is twisted, the teeth on one of the pull rods 95 just mesh with the teeth on the missing gear 96, and the teeth on the other pull rod 95 are opposite to the missing teeth on the missing gear 96. Therefore, as the knob 3 continues to be twisted, the pull rod 95 meshing with the missing gear 96 can pull the two racks 91 connected to it to move synchronously through the corresponding U-shaped plate 92. As the rack 91 moves, the multiple transmission gears 85 meshing with the rack 91 can start to rotate under the drive of the rack 91, so that the two metal sections 811 on the connecting ring 81 can gradually rotate toward the direction of the corresponding metal connecting block 10. When the connecting When the two metal segments 811 on the ring 81 are connected to the two metal connecting blocks 10, the wire connected to the terminal 5 can realize the electrical connection operation between the two metal connecting blocks 10 through the two metal segments 811 and the metal rod 82 on the connecting ring 81. In this process, the teeth on the other pull rod 95 are never engaged with the teeth of the missing gear 96, so that it can remain stationary. When it is necessary to switch to another power level 12, firstly, the knob 3 is reversed to return it to the neutral position 13, so that the originally rotating connecting ring 81 can be reset and the two connected metal connecting blocks 10 are disconnected. Then, the knob 3 is twisted to deflect toward another power level 12. At this time, the connecting ring 81 and the pull rod 95 in the other switch body 4 can repeat the above operation, so as to complete the switching operation of another power level 12.

[0039] And due to the existence of the connecting component 8, during the entire process of switching the power level 12, the knob 3 on the controller 2 not only realizes the switching operation of the power supply, but also, when one power supply is used, the incoming and outgoing lines on the other power supply can be cut off from the corresponding switch body 4 as the connecting ring 81 in the corresponding switch body 4 rotates, thereby avoiding leakage caused by a humid environment and greatly increasing the safety of electricity use of the electric explosion-proof rubber-wheeled vehicle underground after switching the power supply.

[0040] like Figure 7As shown, the side of the metal connecting block 10 opposite to the connecting ring 81 is designed as an arc surface, and the arc surface can perfectly fit together with the surface of the connecting ring 81, and the side of the metal connecting block 10 opposite to the connecting block is provided with a groove, and a metal movable block 14 is slidably inserted in the groove, and the end of the movable block 14 close to the connecting ring 81 is also designed as an arc surface, and the center of the arc surface of the movable block 14 coincides with the center of the arc surface of the metal connecting block 10, and the side of the movable block 14 away from the connecting ring 81 is fixedly connected with a metal telescopic rod 15, and the end of the telescopic rod 15 away from the movable block 14 is fixedly connected to the groove wall on the corresponding side of the groove, and a compression spring 16 is sleeved on the telescopic rod 15, and the two ends of the compression spring 16 are respectively fixedly connected to the movable block 14 and the inner wall of the groove;

[0041] By providing the movable block 14, when the connecting ring 81 is fitted with two opposite metal connecting blocks 10, the movable block 14 can be tightly attached to the outer side of the connecting ring 81 under the action of the compression spring 16, so that when the two metal segments 811 of the connecting ring 81 are respectively opposite to the two metal connecting blocks 10 during the rotation of the connecting ring 81, the two movable blocks 14 can be tightly attached to the metal segments 811 of the connecting ring 81 under the action of the corresponding compression springs 16, thereby ensuring a stable electrical connection between the metal connecting block 10 and the connecting ring 81;

[0042] In addition, the movable block 14 can generate pressure on the connecting ring 81 under the pushing action of the clamping spring 16, so that when the teeth of the pull rod 95 are not engaged with the teeth on the missing gear 96, the pressure generated by the movable block 14 on the connecting ring 81 can also ensure the stability of the connecting ring 81 in the static state.

[0043] like Figure 5 As shown, the rear side of the limiting slider 94 is evenly installed with balls 17, and the balls 17 can fit with the inner wall of the limiting slide groove 93;

[0044] By providing the ball bearing 17 , when the limit slider 94 slides along the limit slot 93 , the ball bearing 17 can reduce the friction between the limit slider 94 and the limit slot 93 , so that the rack 91 can more easily drive the transmission gear 85 to rotate under the drive of the U-shaped plate 92 .

[0045] like Figures 4 to 6 As shown, the side of the rack 91 away from the transmission gear 85 is fixedly connected to a support bar 18, and a strip groove 19 is opened on the groove wall of the connecting groove 6 on the side opposite to the support bar 18, and the support bar 18 is slidably installed in the strip groove 19;

[0046] By providing the support bar 18, when the rack 91 drives the transmission gear 85 to rotate, the support bar 18 can slide along the bar groove 19 and provide support force for the rack 91 from the side of the rack 91 away from the transmission gear 85, thereby ensuring that the rack 91 and the transmission gear 85 can be stably meshed together.

[0047] like Figure 6 As shown, a plurality of receiving grooves are evenly formed on the outer side of the insulating section 812 of the connecting ring 81, and a friction strip 20 is fixedly connected in the receiving groove, and the friction strip 20 is flush with the outer side of the insulating section 812 of the connecting ring 81;

[0048] By providing the friction strip 20, during the rotation of the connecting ring 81, the friction strip 20 can grind the side of the metal connecting block 10 and the movable block 14 opposite to the connecting ring 81, thereby preventing the metal connecting block 10 and the movable block 14 from being oxidized due to long-term friction, and ensuring that the metal segment 811 of the connecting ring 81 maintains a stable electrical connection with the metal connecting block 10 and the movable block 14.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. An underground dual-power isolating switch with leakage protection, comprising a mounting base (1), characterized in that: A controller (2) is mounted on the front side of the mounting seat (1), a knob (3) for switching power is rotatably plugged into the front side of the controller (2), switch bodies (4) are symmetrically arranged on both sides of the controller (2), a plurality of wiring holes are provided on the top and bottom of the switch body (4), a wiring post (5) is fixedly installed in the wiring hole, two connecting grooves (6) are horizontally provided on the front side of the switch body (4), the two connecting grooves (6) are respectively opposite to the regions where the plurality of wiring holes are located on the top and bottom of the switch body (4), a connecting hole (7) is provided through the connecting groove (6) at a position opposite to the wiring hole, and the connecting hole (7) is connected to the corresponding wiring hole, the connecting groove (6) 6) is provided with a connection component (8) at a position opposite to the connection hole (7), the controller (2) is provided with a driving component (9) for driving the connection component (8) to move, the connection component (8) is provided with metal connection blocks (10) at the top and bottom, one of the metal connection blocks (10) is inserted into the corresponding connection hole (7) and fixedly connected to the corresponding terminal (5), the other metal connection block (10) is fixedly connected to the wall of the connection groove (6) on the corresponding side and is electrically connected to the circuit elements inside the switch body (4), the front side of the switch body (4) is installed with a protective cover (11), and the two connection grooves (6) are both located on the inner side of the protective cover (11); The connecting assembly (8) comprises a connecting ring (81), the connecting ring (81) is divided into two completely identical metal segments (811) and two insulating segments (812), and the outer side of the connecting ring (81) is kept in contact with the corresponding two metal connecting blocks (10), the two metal segments (811) and the two insulating segments (812) are arranged alternately, and a metal rod (82) is fixedly connected between the two opposite sides of the two metal segments (811), an insulating rotating shaft (83) is vertically inserted and inserted between the front and rear sides of the middle of the metal rod (82), the rear end of the rotating shaft (83) is vertically rotatably connected to the rear side groove wall of the connecting groove (6), the front end of the rotating shaft (83) is rotatably connected to a fixed block (84), the fixed block (84) is fixedly connected to the groove wall of the connecting groove (6) on the side close to the connecting hole (7), and a transmission gear (85) is fixedly sleeved at a position close to the front end of the rotating shaft (83); The driving assembly (9) comprises a rack (91), and the teeth on the rack (91) are meshed with the plurality of transmission gears (85); a U-shaped plate (92) is fixedly connected between the front sides of the racks (91) in the two connecting grooves (6); a limit slide groove (93) is provided on the front side of the switch body (4); a limit slider (94) is fixedly connected to a position of the U-shaped plate (92) relative to the limit slide groove (93); the limit slider (94) is slidably installed in the limit slide groove (93); a pull rod (95) is fixedly connected to a side of the U-shaped plate (92) close to the controller (2); and the pull rods (95) on the two U-shaped plates (92) are rotationally symmetrical about the knob (3); the protective cover (11) is close to the controller (2). A notch is provided through one side of the controller (2) at a position opposite to the pull rod (95), and the pull rod (95) is inserted into the notch; a portion of the knob (3) located inside the controller (2) is fixedly sleeved with a missing gear (96); a circular gear groove (97) is provided inside the controller (2) at a position opposite to the missing gear (96), and the missing gear (96) is located in the gear groove (97); slots (98) are provided at positions of the gear groove (97) and opposite to the free ends of the two pull rods (95), and the two pull rods (95) are respectively slidably inserted into the two slots (98); a section of teeth is evenly distributed on one side of the pull rod (95) opposite to the missing gear (96), and the teeth can mesh with the missing gear (96); The knob (3) controls two power levels (12) and a neutral level (13), the neutral level (13) being symmetrically distributed between the two power levels (12), and the two power levels (12) being respectively opposite to the two switch bodies (4). In an initial state, the knob (3) is opposite to the neutral level (13), and at this time, the two insulating sections (812) on the connecting ring (81) in the two switch bodies (4) are respectively opposite to the corresponding metal connecting blocks (10). When the knob (3) is opposite to one of the power levels (12), the metal section (811) of the connecting ring (81) in the switch body (4) corresponding to the power level (12) is electrically connected to the corresponding two metal connecting blocks (10), while the insulating section (812) on the connecting ring (81) in the other switch body (4) is opposite to the corresponding two metal connecting blocks (10); The side of the metal connection block (10) opposite to the connection ring (81) is designed as an arc surface, and the arc surface can perfectly fit together with the surface of the connection ring (81). The side of the metal connection block (10) opposite to the connection block is provided with a groove, and a metal movable block (14) is slidably inserted in the groove, and the end of the movable block (14) close to the connection ring (81) is also designed as an arc surface, and the center of the arc surface of the movable block (14) coincides with the center of the arc surface of the metal connection block (10). The side of the movable block (14) away from the connection ring (81) is fixedly connected to a metal telescopic rod (15), and one end of the telescopic rod (15) away from the movable block (14) is fixedly connected to the groove wall corresponding to one side of the groove, and a compression spring (16) is sleeved on the telescopic rod (15), and the two ends of the compression spring (16) are respectively fixedly connected to the movable block (14) and the inner wall of the groove.

2. The underground dual power supply isolating switch with leakage protection according to claim 1, characterized in that: The switch body (4) and the controller (2) are both detachably mounted on the mounting base (1), and the two are electrically connected together.

3. The underground dual-power isolating switch with leakage protection according to claim 1 is characterized in that: The toothed portion on the missing gear (96) is distributed in half with the toothed portion, and when the toothed portion of the missing gear (96) is meshed with the teeth on one of the pull rods (95), the toothed portion of the missing gear (96) can be opposite to the teeth on the other pull rod (95).

4. The underground dual power supply isolating switch with leakage protection according to claim 1, characterized in that: The rear side of the limiting sliding block (94) is evenly mounted with balls (17), and the balls (17) are able to fit with the inner wall of the limiting sliding groove (93).

5. The underground dual power supply isolating switch with leakage protection according to claim 1, characterized in that: A support bar (18) is fixedly connected to the side of the rack (91) away from the transmission gear (85), a strip groove (19) is provided on the groove wall of the connecting groove (6) on the side opposite to the support bar (18), and the support bar (18) is slidably mounted in the strip groove (19).

6. The underground dual-power isolating switch with leakage protection according to claim 1, characterized in that: A plurality of receiving grooves are evenly arranged on the outside of the insulating section (812) of the connecting ring (81), and a friction strip (20) is fixedly connected in the receiving groove, and the friction strip (20) is flush with the outside of the insulating section (812) of the connecting ring (81).

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