A switching device

Abstract

The utility model relates to a power distribution equipment technical field discloses a kind of switchgears. Switchgear includes cabinet and voltage transformer handcart, high voltage compartment and operating compartment are equipped in cabinet, residual charge release device is equipped in operating compartment, voltage transformer handcart includes car body and voltage transformer, car body has working position and test position, in the process that car body moves from working position to test position, voltage transformer carries residual charge, residual charge release device will contact with the telescopic end of voltage transformer, residual charge release device releases residual charge carried by voltage transformer, even if voltage transformer is not electrified, will not hurt operator, improve the security of operator when working. Voltage transformer handcart also includes alarm device, alarm device is triggered by fuse blowing, so that operator can timely find and replace the fuse of fuse blowing.

Description

Technical Field

[0001] This utility model relates to the field of power distribution equipment technology, and in particular to a switchgear. Background Technology

[0002] Voltage transformer trolleys are key primary components in the primary circuit of switchgear, playing a crucial role in the operation of the equipment. Their main functions are to supply power to measuring instruments and relay protection devices to measure line voltage, power, and energy, or to protect valuable equipment, motors, and transformers in the event of a line fault. Mounting the voltage transformer on the trolley facilitates maintenance and replacement of the transformer, as well as fuse replacement.

[0003] However, in the existing technology, when the voltage transformer trolley is pushed from the working position to the test position, the voltage transformer trolley carries residual charge, which can easily injure the operator and pose a certain safety hazard. Utility Model Content

[0004] The purpose of this invention is to provide a switching device that can eliminate residual charge on the voltage transformer trolley when it is pushed from the working position to the test position, thereby improving the safety of operators.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A switching device, comprising:

[0007] The cabinet contains a high-voltage compartment and an operating compartment, and the operating compartment contains a residual charge release device.

[0008] A voltage transformer trolley includes a trolley body and a voltage transformer. The voltage transformer is mounted on the trolley body, which is movably connected to an operating compartment. The trolley body has a working position in which the telescopic end of the voltage transformer passes through the side wall of the operating compartment and is placed inside the high-voltage compartment, and a test position in which the voltage transformer is placed outside the operating compartment. During the process of the trolley body switching from the working position to the test position, a residual charge release device contacts the telescopic end of the voltage transformer. The residual charge release device is used to release the residual charge carried by the voltage transformer.

[0009] As an optional technical solution for the aforementioned switching equipment, the residual charge release device includes a mounting base and a copper foil sheet. The mounting base is fixed to the side wall of the operating compartment and is grounded. One end of the copper foil sheet is connected to the mounting base, and the other end of the copper foil sheet is used to contact the telescopic terminal of the voltage transformer.

[0010] As an optional technical solution for the aforementioned switching equipment, the copper foil is bent, and the end of the copper foil that contacts the telescopic end of the voltage transformer has an arc-shaped structure.

[0011] As an optional technical solution for the aforementioned switching equipment, each extension terminal of the voltage transformer is respectively provided with the residual charge release device.

[0012] As an optional technical solution for the aforementioned switching equipment, the voltage transformer trolley further includes an alarm device. The alarm device includes a rotating shaft, a first triggering part, a second triggering part, and a detection element. The rotating shaft is rotatably connected to the trolley body. The first triggering part and the second triggering part are both disposed on the rotating shaft. The first triggering part is disposed corresponding to the fuse of the voltage transformer, and the second triggering part is disposed corresponding to the detection element. The first triggering part is configured to be triggered when the fuse blows, causing the rotating shaft to rotate around a first direction. The rotation of the rotating shaft causes the second triggering part to trigger the detection element.

[0013] As an optional technical solution for the aforementioned switching device, an elastic reset member is connected between the second trigger part and the vehicle body. The elastic reset member is configured to cause the rotating shaft to rotate around a second direction after the blown fuse has been replaced. The second direction is opposite to the first direction.

[0014] As an optional technical solution for the aforementioned switching device, one end of the rotating shaft is provided with a first connecting seat, and the middle of the rotating shaft is provided with a second connecting seat. The rotating shaft is rotatably connected to the first connecting seat and the second connecting seat. The first connecting seat and the second connecting seat are respectively fixedly connected to the vehicle body. One end of the rotating shaft is provided with a first limiting member and a second limiting member spaced apart. The first connecting seat is disposed between the first limiting member and the second limiting member. The first triggering part is disposed between the first connecting seat and the second connecting seat. The second triggering part is disposed at the other end of the rotating shaft.

[0015] As an optional technical solution for the aforementioned switchgear, a terminal block is provided in the high-voltage compartment, and each telescopic end of the voltage transformer placed in the high-voltage compartment is in contact with the corresponding terminal block, and the terminal block is connected to a shield.

[0016] As an optional technical solution for the aforementioned switchgear, the operating compartment is arranged adjacent to the high-voltage compartment, and the side wall shared by the operating compartment and the high-voltage compartment is provided with through holes. The number of through holes corresponds to the telescopic end of the voltage transformer, and the telescopic end of the voltage transformer passes through the through holes and is placed in the high-voltage compartment.

[0017] The operating compartment is equipped with a valve mechanism, which includes a fixed base and a valve assembly. One end of the valve assembly is connected to the fixed base. The vehicle body is equipped with a movable push plate. When the vehicle body switches from the test position to the working position, the movable push plate drives the valve assembly to move, so that the other end of the valve assembly avoids the through hole. When the vehicle body switches from the working position to the test position, the movable push plate separates from the valve assembly, and the direction of movement of the other end of the valve assembly is opposite to the direction of movement of the other end of the valve assembly when the vehicle body is in the working position.

[0018] As an optional technical solution for the aforementioned switchgear, the side wall adjacent to the operating compartment and the high-voltage compartment is provided with an insulating plate;

[0019] And / or, the outer side of the cabinet is detachably connected to a ramp, one end of which is flush with the bottom surface of the operating compartment, and the other end of which is provided with a downwardly sloping surface;

[0020] And / or, the vehicle body is provided with a handle on the side away from the high-voltage compartment, the handle is slidably connected to the vehicle body, a locking tongue is provided on one side of the vehicle body, one end of the locking tongue is connected to the handle, and moving the handle can cause the locking tongue to extend or retract into the vehicle body, and a fixing groove is provided in the operating compartment, the part of the locking tongue extending out of the vehicle body is inserted into the fixing groove.

[0021] As a preferred option,

[0022] Beneficial effects:

[0023] The switching device provided by this utility model has a working position and a test position. During the process of the vehicle body moving from the working position to the test position, the voltage transformer carries residual charge. The residual charge release device will contact the extension end of the voltage transformer and release the residual charge carried by the voltage transformer. Even if the voltage transformer is not energized, it will not harm the operator and improve the safety of the operator during work.

[0024] Furthermore, the voltage transformer handcart of the switchgear provided by this utility model includes an alarm device. When the fuse blows, the first triggering part of the alarm device is triggered, causing the rotating shaft to rotate. The rotation of the rotating shaft drives the second triggering part to trigger the detection element. The detection element is triggered and sends an alarm signal that the fuse has blown, so that the operator can promptly detect and replace the blown fuse. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the switching device provided in this embodiment of the present invention when the voltage transformer trolley is in the test position;

[0026] Figure 2 This is a schematic diagram of the switching device provided in this embodiment of the present invention when the voltage transformer trolley is in the working position;

[0027] Figure 3 This is a schematic diagram of the residual charge release device and the telescopic end of the voltage transformer provided in this embodiment of the present invention.

[0028] Figure 4 This is a schematic diagram of the structure of the voltage transformer trolley provided in this embodiment of the utility model;

[0029] Figure 5 This is a schematic diagram of the alarm device provided in this embodiment of the present invention in its normal state;

[0030] Figure 6 This is a schematic diagram of the structure of the voltage transformer and alarm device provided in this embodiment of the utility model;

[0031] Figure 7 This is a schematic diagram of the alarm device provided in this embodiment of the present invention in an alarm state;

[0032] Figure 8 This is a schematic diagram of the gate mechanism provided in an embodiment of the present utility model;

[0033] Figure 9 This is a schematic diagram of the structure of the movable push plate provided in this embodiment of the utility model;

[0034] Figure 10 This is a schematic diagram of the internal structure of the cabinet provided in this embodiment of the utility model.

[0035] In the picture:

[0036] 1. Cabinet; 2. Voltage transformer trolley; 3. Residual charge release device; 4. Terminal block; 5. Shielding; 6. Door mechanism; 7. Sloping plate;

[0037] 11. High-voltage compartment; 12. Operating compartment; 13. Insulating board; 14. Fixing groove;

[0038] 21. Vehicle body; 211. Chassis vehicle; 212. Frame; 213. Roller; 22. Voltage transformer; 221. Telescopic end; 222. Fuse; 223. Strike pin; 23. Alarm device; 231. Shaft; 232. First trigger part; 233. Second trigger part; 234. Detector; 235. Elastic reset part; 236. First connecting seat; 237. Second connecting seat; 238. Second limiting part; 24. Movable push plate; 241. Arc-shaped surface; 242. First inclined surface; 243. Straight surface; 244. Second inclined surface; 245. First bending plate; 246. Second bending plate; 25. Handle; 26. Locking tongue; 27. Handle; 28. Grounding part;

[0039] 31. Mounting base; 32. Copper foil sheet;

[0040] 61. Fixed base; 62. Valve assembly. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0042] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0045] like Figures 1 to 3 As shown, this embodiment provides a switchgear, which includes a cabinet 1 and a voltage transformer cart 2. The cabinet 1 contains a high-voltage compartment 11 and an operating compartment 12. The operating compartment 12 contains a residual charge release device 3. The voltage transformer cart 2 includes a cart body 21 and a voltage transformer 22. The voltage transformer 22 is mounted on the cart body 21, which is movably connected to the operating compartment 12. The cart body 21 has a working position where the telescopic end 221 of the voltage transformer 22 passes through the side wall of the operating compartment 12 and is placed inside the high-voltage compartment 11, and a test position where the voltage transformer 22 is placed outside the operating compartment 12. During the process of switching the cart body 21 from the working position to the test position, the residual charge release device 3 contacts the telescopic end 221 of the voltage transformer 22, and the residual charge release device 3 is used to release the residual charge carried by the voltage transformer 22.

[0046] The vehicle body 21 has a working position and a test position. During the process of the vehicle body 21 moving from the working position to the test position, the voltage transformer 22 carries residual charge. The residual charge release device 3 will contact the telescopic end 221 of the voltage transformer 22 and release the residual charge carried by the voltage transformer 22. Even if the voltage transformer 22 is not energized, it will not harm the operator and improve the safety of the operator during work.

[0047] In some embodiments, such as Figure 3As shown, the residual charge release device 3 includes a mounting base 31 and a copper foil 32. The mounting base 31 is fixed to the side wall of the operating compartment 12 and is grounded. One end of the copper foil 32 is connected to the mounting base 31, and the other end of the copper foil 32 is used to contact the telescopic end 221 of the voltage transformer 22. The copper foil 32 has a certain elasticity. During the process of the vehicle body 21 moving from the test position to the working position, the voltage transformer 22 can apply force to the copper foil 32, causing the copper foil 32 to deform without affecting the movement of the voltage transformer 22. During the process of the vehicle body 21 moving from the work position to the test position, the voltage transformer 22 can apply force to the copper foil 32, causing the copper foil 32 to deform. After the voltage transformer 22 moves to a certain position, the voltage transformer 22 no longer applies force to the copper foil 32, the copper foil 32 resets and contacts the telescopic end 221 of the voltage transformer 22. The residual charge carried by the voltage transformer 22 is released through the copper foil 32. The residual charge release device 3 has a simple structure and is easy to implement.

[0048] Optionally, the copper foil 32 is bent, with the end of the copper foil 32 that contacts the telescopic end 221 of the voltage transformer 22 having an arc-shaped structure. This minimizes the resistance of the copper foil 32 to the movement of the voltage transformer 22 while ensuring sufficient contact between the copper foil 32 and the voltage transformer 22. The bending of the copper foil 32 increases its elasticity, resulting in better elastic strength. The width and thickness of the copper foil 32 can be set according to actual needs and are not specifically limited here.

[0049] In other embodiments, the residual charge release device includes two conductive clamps spaced apart on both sides of the voltage transformer 22. The conductive clamps are elastically connected to the operating compartment 12, and each conductive clamp is grounded. The diameter of the telescopic end 221 of the voltage transformer 22 is smaller than the rest, allowing the voltage transformer 22 to pass between the two conductive clamps, increasing the distance between them. When the telescopic end 221 of the voltage transformer 22 is positioned between the two conductive clamps, the two conductive clamps reset and come into contact with the telescopic end 221 of the voltage transformer 22, releasing the residual charge carried by the voltage transformer 22 through the conductive clamps. The conductive clamps are made of copper.

[0050] In some embodiments, each extension end 221 of the voltage transformer 22 is provided with a residual charge release device 3 to ensure the effectiveness of the release of residual charge carried by the voltage transformer 22.

[0051] In some embodiments, such as Figures 4 to 7As shown, the voltage transformer trolley 2 also includes an alarm device 23. The alarm device 23 includes a rotating shaft 231, a first trigger part 232, a second trigger part 233, and a detection element 234. The rotating shaft 231 is rotatably connected to the vehicle body 21. The first trigger part 232 and the second trigger part 233 are both disposed on the rotating shaft 231. The first trigger part 232 is disposed corresponding to the fuse 222 of the voltage transformer 22, and the second trigger part 233 is disposed corresponding to the detection element 234. The first trigger part 232 is configured to be triggered when the fuse 222 blows, causing the rotating shaft 231 to rotate around a first direction. The rotation of the rotating shaft 231 causes the second trigger part 233 to trigger the detection element 234. When any fuse 222 blows, the second trigger part 233 will trigger the detection element 234. The detection element 234 is triggered to issue an alarm signal that the fuse 222 has blown, so that the operator can promptly detect and replace the blown fuse 222. When fuse 222 blows, it triggers the striker 223 inside the voltage transformer 22, which in turn pushes the first trigger 232. The structure of the striker 223 is prior art and will not be described in detail here. Optionally, the detection element 234 is a micro switch. When fuse 222 is not blown, the second trigger 233 is in contact with the drive rod of the micro switch. When either fuse 222 blows, the second trigger 233 separates from the drive rod of the micro switch, and the micro switch sends a signal indicating that fuse 222 has blown. Alternatively, the detection element 234 is a micro switch. When fuse 222 is not blown, the second trigger 233 is not in contact with the drive rod of the micro switch. When either fuse 222 blows, the second trigger 233 triggers the drive rod of the micro switch, and the micro switch sends a signal indicating that fuse 222 has blown.

[0052] Optionally, a resilient reset member 235 is connected between the second trigger 233 and the vehicle body 21. The resilient reset member 235 is configured to cause the rotating shaft 231 to rotate in a second direction, opposite to the first direction, after the blown fuse 222 has been replaced. When the first trigger 232 is triggered, the second trigger 233 rotates with the rotating shaft 231, and the resilient reset member 235 stores energy. When the first trigger 232 is not triggered, the resilient reset member 235 releases energy, causing the rotating shaft 231 to rotate and reset in the second direction. The resilient reset member 235 can be a spring.

[0053] A first connecting seat 236 is provided at one end of the rotating shaft 231, and a second connecting seat 237 is provided in the middle of the rotating shaft 231. The rotating shaft 231 is rotatably connected to the first connecting seat 236 and the second connecting seat 237. The first connecting seat 236 and the second connecting seat 237 are respectively fixedly connected to the vehicle body 21. A first limiting member and a second limiting member 238 are provided at one end of the rotating shaft 231 at a distance. The first connecting seat 236 is disposed between the first limiting member and the second limiting member 238. A first trigger part 232 is disposed between the first connecting seat 236 and the second connecting seat 237. A second trigger part 233 is disposed at the other end of the rotating shaft 231. The first connecting seat 236 and the second connecting seat 237 realize the rotatable connection between the rotating shaft 231 and the vehicle body 21, and the connection structure is simple. The first limiting member and the second limiting member 238 limit the rotating shaft 231 axially, preventing the rotating shaft 231 from disengaging from the first connecting seat 236 and the second connecting seat 237.

[0054] The first limiting member includes a boss disposed at the end of the rotating shaft, the second limiting member 238 includes a retaining ring sleeved on the rotating shaft 231, the first connecting seat 236 is disposed between the boss and the retaining ring, and one of the first trigger parts 232 is disposed close to the retaining ring so that the retaining ring abuts against the first connecting seat 236.

[0055] The first triggering unit 232 includes a trigger plate and a trigger rod. The trigger plate is connected to the rotating shaft 231, one end of the trigger rod is connected to the trigger plate, and the other end of the trigger rod is used to be triggered by the voltage transformer 22. The trigger plate facilitates the connection with the rotating shaft 231.

[0056] All components of the aforementioned alarm device 23 are made of insulating materials to prevent the voltage transformer 22 from transmitting charge to the alarm device 23 and to ensure the insulation of the vehicle body 21.

[0057] In some embodiments, continue to refer to Figure 2 and Figure 3 As shown, a terminal block 4 is provided inside the high-voltage compartment 11. Each extension end 221 of the voltage transformer 22 placed inside the high-voltage compartment 11 contacts the corresponding terminal block 4. The terminal block 4 is connected to a shielding component 5. The terminal block 4 is used to connect to the high-voltage power supply, and the shielding component 5 is used to improve the electric field, making it easier to pass lightning impulse tests and partial discharge tests. When there are small radius edges or protrusions on the conductor surface, especially at the ends, it will cause uneven voltage distribution, which will lead to a local increase in the electric field at the ends, causing excessive partial discharge. The shielding component 5 uses the principle of equipotential shielding to place the uneven area in an equipotential shielded area. The shielding component 5 can be a uniform ring. The uniform ring can disperse the electric field area by its own smooth contour, which can effectively solve the partial discharge problem.

[0058] In some embodiments, continue to refer to Figure 1 , Figure 2 and Figure 8As shown, the operating compartment 12 and the high-voltage compartment 11 are arranged adjacent to each other. The side wall shared by the operating compartment 12 and the high-voltage compartment 11 is provided with through holes. The number of through holes corresponds to the telescopic end 221 of the voltage transformer 22. The telescopic end 221 of the voltage transformer 22 passes through the through holes and is placed inside the high-voltage compartment 11. The operating compartment 12 is provided with a valve mechanism 6, which includes a fixed base 61 and a valve assembly 62. One end of the valve assembly 62 is connected to the fixed base 61. When the vehicle body 21 is switched from the test position to the working position, the movable push plate 24 drives the valve assembly 62 to move, so that the other end of the valve assembly 62 avoids the through holes, allowing the voltage transformer 22 to pass through. When the vehicle body 21 is switched from the working position to the test position, the movable push plate 24 separates from the valve assembly 62, and the direction of movement of the other end of the valve assembly 62 is opposite to the direction of movement of the other end of the valve assembly 62 when the vehicle body 21 is in the working position. When the vehicle body 21 switches from the working position to the test position, the movable push plate 24 separates from the valve assembly 62. The other end of the valve assembly 62 is placed between the through hole and the telescopic end of the voltage transformer 22 to isolate the voltage transformer 22 and the high-voltage compartment 11, thereby improving the safety of the switchgear. The structure of the valve assembly 62 and the structure of the valve assembly 62 and the movable push plate 24 are existing technologies and will not be described in detail here.

[0059] Optionally, such as Figure 4 and Figure 9 As shown, one end of the movable push plate 24 is connected to the vehicle body 21, and the other end of the movable push plate 24 is bent to form a first bent plate 245. The end of the first bent plate 245 facing the operating compartment 12 is bent to form a second bent plate 246. The second bent plate 246 is used to drive the valve assembly 62. The side of the first bent plate 245 includes an arc-shaped surface 241, a first inclined surface 242, a straight surface 243, and a second inclined surface 244 connected in sequence. The movable push plate 24 with the straight surface 243 has the largest width. The first inclined surface 242 and the second inclined surface 244 can avoid the structure of the column inside the cabinet 1, making it easier for the vehicle body 21 to enter the working position or exit to the test position.

[0060] In some embodiments, such as Figure 10 As shown, the side wall adjacent to the operating compartment 12 and the high-voltage compartment 11 is provided with an insulating plate 13 to ensure the insulation of the voltage transformer trolley 2. The width and length of the insulating plate 13 are set according to the voltage level and the actual space inside the cabinet 1.

[0061] In some embodiments, combined with Figure 4 and Figure 10As shown, a handle 25 is provided on the side of the vehicle body 21 facing away from the high-voltage compartment 11. The handle 25 is slidably connected to the vehicle body 21. A locking tongue 26 is provided on one side of the vehicle body 21, and one end of the locking tongue 26 is connected to the handle 25. Moving the handle 25 can extend or retract the locking tongue 26 into the vehicle body 21. A fixing groove 14 is provided in the operating compartment 12, and the part of the locking tongue 26 extending out of the vehicle body 21 is inserted into the fixing groove 14. The locking tongue 26 and the fixing groove 14 cooperate to fix the vehicle body 21 in the working position. Optionally, two handles 25 are provided on the side of the vehicle body 21 facing away from the high-voltage compartment 11. The two handles 25 are spaced apart at both ends of the vehicle body 21, and each handle 25 is respectively provided with a locking tongue 26.

[0062] An elastic element connects the latch 26 to the vehicle body 21. When the handle 25 is turned to disengage the latch 26 from the fixing groove 14, the elastic element is compressed. When no external force is applied to the handle 25, the elastic element releases energy to drive the latch 26 into an extended state.

[0063] The vehicle body 21 includes a chassis 211 and a frame 212. The frame 212 is mounted on the chassis 211, and the voltage transformer 22 and alarm device 23 are mounted on the frame 212. The movable push plate 24, the locking tongue 26, and the handle 25 are all mounted on the chassis 211. The bottom of the chassis 211 is provided with rollers 213. Optionally, at least two rollers 213 are installed on the left and right sides of the bottom of the chassis 211. The bottom of the operating compartment 12 is provided with guide rails on both sides, and the rollers 213 are slidably mounted on the guide rails to facilitate sliding out or in into the vehicle body 21.

[0064] A handle 27 is provided on the side of the frame 212 away from the high-voltage compartment 11, which makes it convenient for operators to push the vehicle body 21.

[0065] The vehicle body 21 is also equipped with a grounding component 28, which is used to ground the voltage transformer handcart 2 and ensure the insulation of the voltage transformer handcart 2.

[0066] like Figures 1 to 3 As shown, in some embodiments, a ramp 7 is detachably connected to the outside of the cabinet 1. One end of the ramp 7 is flush with the bottom surface of the operating compartment 12, and the other end of the ramp 7 is provided with a downward inclined surface, which facilitates the voltage transformer trolley 2 to enter the working position or exit to the test position under manual operation.

[0067] The switching equipment provided in this embodiment includes a residual charge release device 3. This device 3 contacts the telescopic end 221 of the voltage transformer 22, releasing any residual charge carried by the voltage transformer 22. Even if the voltage transformer 22 is not energized, it will not injure the operator, thus improving operator safety. The voltage transformer trolley 2 also includes an alarm device 23, which enables the operator to promptly detect and replace blown fuses 222.

[0068] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A switching device, characterized in that, include: Cabinet (1), the cabinet (1) is provided with a high voltage compartment (11) and an operating compartment (12), the operating compartment (12) is provided with a residual charge release device (3); The voltage transformer trolley (2) includes a trolley body (21) and a voltage transformer (22). The voltage transformer (22) is mounted on the trolley body (21). The trolley body (21) is movably connected to the operating compartment (12). The trolley body (21) has a working position in which the telescopic end (221) of the voltage transformer (22) passes through the side wall of the operating compartment (12) and is placed inside the high-voltage compartment (11). It also has a test position in which the voltage transformer (22) is placed outside the operating compartment (12). During the process of the trolley body (21) switching from the working position to the test position, the residual charge release device (3) contacts the telescopic end (221) of the voltage transformer (22). The residual charge release device (3) is used to release the residual charge carried by the voltage transformer (22).

2. The switching device according to claim 1, characterized in that, The residual charge release device (3) includes a mounting base (31) and a copper foil (32). The mounting base (31) is fixed to the side wall of the operating compartment (12) and grounded. One end of the copper foil (32) is connected to the mounting base (31), and the other end of the copper foil (32) is used to contact the telescopic end (221) of the voltage transformer (22).

3. The switching device according to claim 2, characterized in that, The copper foil (32) is bent, and the end of the copper foil (32) that contacts the telescopic end (221) of the voltage transformer (22) has an arc-shaped structure.

4. The switching device according to claim 1, characterized in that, Each extension end (221) of the voltage transformer (22) is respectively provided with the residual charge release device (3).

5. The switching device according to claim 1, characterized in that, The voltage transformer truck (2) also includes an alarm device (23), which includes a rotating shaft (231), a first trigger (232), a second trigger (233), and a detection element (234). The rotating shaft (231) is rotatably connected to the truck body (21). The first trigger (232) and the second trigger (233) are both disposed on the rotating shaft (231). The first trigger (232) is disposed corresponding to the fuse (222) of the voltage transformer (22), and the second trigger (233) is disposed corresponding to the detection element (234). The first trigger (232) is configured to be triggered when the fuse (222) blows, causing the rotating shaft (231) to rotate around a first direction. The rotation of the rotating shaft (231) causes the second trigger (233) to trigger the detection element (234).

6. The switching device according to claim 5, characterized in that, The second trigger part (233) is connected to the vehicle body (21) by an elastic reset member (235), which is configured to rotate the shaft (231) about a second direction after the fuse (222) has been replaced, the second direction being opposite to the first direction.

7. The switching device according to claim 5, characterized in that, One end of the rotating shaft (231) is provided with a first connecting seat (236), and the middle part of the rotating shaft (231) is provided with a second connecting seat (237). The rotating shaft (231) is rotatably connected to the first connecting seat (236) and the second connecting seat (237). The first connecting seat (236) and the second connecting seat (237) are respectively fixedly connected to the vehicle body (21). One end of the rotating shaft (231) is provided with a first limiting member and a second limiting member (238) spaced apart. The first connecting seat (236) is disposed between the first limiting member and the second limiting member (238). The first trigger part (232) is disposed between the first connecting seat (236) and the second connecting seat (237). The second trigger part (233) is disposed at the other end of the rotating shaft (231).

8. The switching device according to any one of claims 1-7, characterized in that, The high-voltage compartment (11) is provided with a terminal block (4). Each telescopic end (221) of the voltage transformer (22) placed in the high-voltage compartment (11) is in contact with the corresponding terminal block (4). The terminal block (4) is connected to a shield (5).

9. The switching device according to any one of claims 1-7, characterized in that, The operating compartment (12) is located adjacent to the high-voltage compartment (11). The side wall shared by the operating compartment (12) and the high-voltage compartment (11) is provided with through holes. The number of through holes corresponds to the telescopic end (221) of the voltage transformer (22). The telescopic end (221) of the voltage transformer (22) passes through the through holes and is placed inside the high-voltage compartment (11). The operating compartment (12) is provided with a valve mechanism (6), which includes a fixed base (61) and a valve assembly (62). One end of the valve assembly (62) is connected to the fixed base (61). The vehicle body (21) is provided with a movable push plate (24). When the vehicle body (21) is switched from the test position to the working position, the movable push plate (24) drives the valve assembly (62) to move, so that the other end of the valve assembly (62) avoids the through hole. When the vehicle body (21) is switched from the working position to the test position, the movable push plate (24) separates from the valve assembly (62). The direction of movement of the other end of the valve assembly (62) is opposite to the direction of movement of the other end of the valve assembly (62) when the vehicle body (21) is placed in the working position.

10. The switching device according to any one of claims 1-7, characterized in that, The side wall of the operating compartment (12) adjacent to the high-voltage compartment (11) is provided with an insulating plate (13). And / or, the outer side of the cabinet (1) is detachably connected to a ramp (7), one end of the ramp (7) is flush with the bottom surface of the operating compartment (12), and the other end of the ramp (7) is provided with a downward inclined surface; And / or, the vehicle body (21) is provided with a handle (25) on the side away from the high-pressure compartment (11), the handle (25) is slidably connected to the vehicle body (21), a locking tongue (26) is provided on one side of the vehicle body (21), one end of the locking tongue (26) is connected to the handle (25), and moving the handle (25) can cause the locking tongue (26) to extend or retract from the vehicle body (21), and a fixing groove (14) is provided in the operating compartment (12), and the part of the locking tongue (26) extending out of the vehicle body (21) is inserted into the fixing groove (14).

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