High-safety high-voltage switch cabinet and use method thereof

Abstract

The invention relates to the technical field of switch cabinets, in particular to a high-safety high-voltage switch cabinet and a using method thereof. The power-off part comprises an intelligent lock rotationally arranged on the opening and closing door, a protruding block is arranged at the end, arranged in the cabinet body, of the intelligent lock, a power plug board and an assembly frame located beside the power plug board are arranged on the side face, facing the interior of the cabinet body, of the closing plate, and a power plug-in connected with the power plug board is slidably arranged in the assembly frame. The power plug-in unit is further provided with a contact frame in contact fit with the protruding block, and the closing plate is further provided with a vertical plate located between the power plug board and the power plug-in unit. Through the arrangement of the power-off part, the connection or disconnection between the power supply plug-in and the power supply plugboard is controlled by remotely controlling the rotation of the intelligent lock, so that remote power-off operation is realized, the switch cabinet is ensured to be subjected to power-off treatment before maintenance, and the occurrence of personal electric shock accidents caused by misoperation such as electrified closing of a grounding knife switch is prevented; and the personal safety of workers is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of switch cabinets, and in particular to a high-safety high-voltage switch cabinet and a use method thereof. Background Art

[0002] High-voltage switchgear is one of the important equipment for receiving and distributing electric energy in the power system, and is mainly used in power plants, substations and other places. It can not only connect and disconnect circuits to achieve control of the power system, but also has a protection function, which can quickly cut off the power supply when a system failure occurs to prevent the accident from expanding.

[0003] At present, most existing switch cabinet structures are provided with a grounding switch operating hole into which a grounding switch can be inserted. The grounding switch operating hole is provided to cooperate with an operating rod to realize the operation of the grounding switch structure in the switch cabinet. The operation is mainly based on the position of the circuit breaker trolley to determine whether the switch cabinet busbar is energized to achieve the desired effect. However, the existing grounding switch operating hole is an open structure, which can be operated regardless of whether the switch cabinet is energized, resulting in a large safety hazard in the maintenance and repair of the switch cabinet, and the safety of operation cannot be ensured, which is even more difficult for the operation of an electric grounding switch. In view of this, a high-safety high-voltage switch cabinet and a method of use thereof are proposed, which can forcibly lock the line in a energized state before maintenance, so as to prevent accidents caused by mistakenly closing the grounding switch and ensure the personal safety of the staff. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a high-safety high-voltage switch cabinet and a method of using the same, which can forcibly lock the energized lines before maintenance, thereby preventing accidents caused by mistakenly closing the grounding switch and ensuring the personal safety of the staff.

[0005] The technical solution is: providing such a high-safety high-voltage switchgear, including:

[0006] The cabinet is equipped with a cable room, a trolley room and a busbar room. The cable room is located at the lower side of the cabinet, and the trolley room and the busbar room are both located above the cable room. The trolley room is located in front of the busbar room. The cable room includes a grounding switch installed on the rear wall of the cabinet. The grounding switch is provided with a sensor for detecting the live state.

[0007] A closing plate is fixedly arranged on one side of the cabinet, and an opening and closing door that fits the closing plate and a sliding door located above the opening and closing door are rotatably arranged on the other side of the cabinet, and an intelligent live display device is arranged on the closing plate, and a sensor on the grounding switch is electrically connected to the intelligent live display device;

[0008] A power-off unit is arranged between the closing plate and the opening and closing door for remote power-off operation. The power-off unit includes a smart lock rotatably arranged on the opening and closing door. The smart lock is electrically connected to the smart power-on display device so as to perform a forced locking operation under power. A protrusion is arranged on the end of the smart lock placed in the cabinet. A power plug-in board and an assembly frame are arranged on the side of the closing plate facing the cabinet. A power plug-in connected to the power plug-in board is slidably arranged inside the assembly frame. A contact frame for contacting and cooperating with the protrusion is also arranged on the power plug-in. A vertical plate located between the power plug-in board and the power plug-in is also arranged on the closing plate. An insulating plate for isolating the power plug-in board and the power plug-in is slidably penetrated on the vertical plate. A hinged plate is hingedly arranged between the insulating plate and the power plug-in.

[0009] Preferably, a detection unit is provided on the top of the cabinet for detecting residual power, the detection unit includes a top frame arranged on the top of the cabinet, red and green warning lights are symmetrically arranged on the top frame, and a horizontal plate located inside the cabinet is symmetrically arranged front and back on the top frame, a detection connector electrically connected to the warning light is slidably inserted between the two side ends of the horizontal plate, and the detection connector is in contact with the side wall of the cabinet, and an elastic member is provided between both sides of the detection connector and the horizontal plate; push rods are rotatably provided on the front sides of the two detection connectors, and a convex rod that abuts and cooperates with the sliding door is rotatably provided between the ends of the two push rods.

[0010] Preferably, the cable chamber also includes a rotating plug rotatably arranged between the mounting plates of the grounding switch, the number of plugs of the rotating plug is consistent with the number and layout of the sockets of the grounding switch and the two are plugged together, and a line lightning arrester is arranged between the rotating plug and the bottom of the cabinet.

[0011] Preferably, the trolley chamber includes a partition plate arranged between the two side walls of the cabinet, an isolating plug is arranged at the rear end of the partition plate, the busbar side contacts of the isolating plug are connected to the internal electrical components of the busbar chamber, the main contacts on the front side of the isolating plug are plugged with the circuit breaker trolley, and the circuit breaker trolley and the partition plate are slidably matched, and a group of slide rails are respectively arranged at the upper and lower intervals of the isolating plug, and valves are slidably arranged between the slide rails of the same group, and the valves on both sides can slide and close.

[0012] Preferably, a blocking mechanism for connecting the rotary plug and the earthing switch is provided on the partition plate, and the blocking mechanism includes a push-pull frame symmetrically slidably penetrated through the partition plate, and the rear end of the push-pull frame extends into the cable chamber, and two elastic members are provided between the two push-pull frames and the partition plate, and inclined plates are provided on the top ends of the two push-pull frames, and the inclined plates are in contact with the circuit breaker trolley. Racks facing the rotary plug are provided on the rear ends of the push-pull frames, and gears meshing with the racks on the same side are provided at the ends of the rotary plug to drive the rotary plug to flip and connect with the earthing switch.

[0013] Preferably, the left and right sides of the protrusion are respectively an arc surface and a plane surface, which are used to cooperate with the contact frame to make contact so as to push the power plug-in to move in both directions.

[0014] The method of using high-safety high-voltage switchgear includes the following steps:

[0015] S1. When the switch cabinet needs to be repaired, the power is first turned off, and the intelligent lock is rotated by remote control, so that the arc-shaped contact surface of the protrusion follows the rotation and contacts the contact frame, and pushes the contact frame to move toward the inside of the assembly frame, thereby driving the power plug-in to slide away from the power plug board in the assembly frame, so that the power plug-in is separated from the power plug board, and then the hinged plate is affected by the movement of the power plug-in, and pushes the insulating plate to slide forward under the guidance of the vertical plate, so as to be spaced between the power plug-in and the power plug board;

[0016] S2. Then the sensor on the grounding switch detects the internal live state. When there is still live state in the three-phase wiring after power failure, the sensor transmits the signal to the intelligent live display device, which displays the corresponding red light and forces the smart lock to be locked. On the contrary, when there is no power inside, the intelligent live display device displays a green light, thereby controlling the smart lock to be unlocked, and the door opens accordingly.

[0017] S3, then observe the warning light, the sliding door is still in a closed state, so that the protruding rod is pressed by the closed sliding door, forcing the push rods on both sides to be in a straight state, and the detection joints on both sides are pushed by the push rods, causing the detection joints to slide to the end position of the horizontal plate, and the elastic member is in a deformed state, and then the detection joint is attached to the wall of the cabinet to detect the residual power of the cabinet. If there is residual power around the cabinet, the warning light will show red. When the warning light shows green, it means that the cabinet is free of residual power and the next operation can be carried out;

[0018] S4, then pull the circuit breaker trolley out from the partition plate, the circuit breaker trolley is out of contact with the isolation plug, and then the valves on both sides are closed, and at the same time the circuits in the busbar room and the cable room are disconnected. As the circuit breaker trolley is pulled out, the inclined plate is not squeezed by the circuit breaker trolley, and then the elastic member 2 is reset, and the push-pull frame moves upward, and the rack meshes with the gear during the upward movement, thereby driving the rotating plug to flip upward, and the rotating plug is connected to the grounding switch, so that the grounding switch is connected to the line lightning arrester, so that the cabinet is in a grounded power-off state, and the switch cabinet can be inspected and repaired from then on;

[0019] S5. After the maintenance operation is completed, the sliding door is closed to reset the initial positions of the detection connectors on both sides, and then the circuit breaker trolley is pushed back into the cabinet. Due to the contact between the circuit breaker trolley and the inclined plate, the push-pull frame is pressed down, and the elastic member 2 is deformed accordingly. The downward-moving rack meshes with the gear, thereby driving the rotating plug to flip downward to disconnect the grounding switch, and then close the opening and closing door, and then operate the smart lock to rotate in the opposite direction, and contact the contact frame through the flat contact surface to pull the power plug and the insulating plate back to their original positions, thereby completing the overall operation process.

[0020] The present invention overcomes the shortcomings of the prior art and can achieve the following beneficial effects:

[0021] 1. The present invention realizes remote power-off operation by setting a power-off part and utilizing the rotation of the remotely controlled smart lock to control the connection or disconnection between the power plug-in and the power strip, thereby ensuring that the switch cabinet is powered off before maintenance, preventing accidents of electric shock caused by misoperation such as closing the grounding switch under power, and ensuring the personal safety of the staff. Furthermore, by utilizing the setting of the smart live display device, the smart lock can be locked in an emergency when it is powered on, thereby further ensuring the operating safety of the maintenance personnel and ensuring the overall safety.

[0022] 2. The setting of the detection unit of the present invention can effectively detect whether there is residual current inside the cabinet, and intuitively inform the operator of the current status through the color change of the warning light. Only when it is confirmed that there is no residual power can the next step of operation be carried out, which further ensures the safety of the operation.

[0023] 3. The present invention provides a blocking mechanism. When the circuit breaker trolley is pulled out, the rotating plug will automatically connect to the grounding switch, ensuring that the entire circuit is in a grounded state during the maintenance process, thereby improving the electrical safety level. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0025] Figure 2 It is a three-dimensional structural schematic diagram of components such as the cabinet, trolley room, cable room and busbar room of the present invention.

[0026] Figure 3 It is a three-dimensional structural schematic diagram of some components of the power-off unit of the present invention.

[0027] Figure 4 It is a three-dimensional structural schematic diagram of components such as an assembly frame, a power plug-in, and a contact frame of the present invention.

[0028] Figure 5 The figure is a three-dimensional structural diagram of the power plug-in, contact frame, vertical plate, insulating plate and hinged plate of the present invention.

[0029] Figure 6 It is a three-dimensional structural schematic diagram of some components of the detection unit of the present invention.

[0030] Figure 7 It is a three-dimensional structural schematic diagram of various components of the detection part of the present invention.

[0031] Figure 8 It is a three-dimensional structural schematic diagram of various components of the trolley chamber and the cable chamber of the present invention.

[0032] Fig. 9 It is a schematic diagram of the planar structure of the blocking mechanism of the present invention from the left side perspective.

[0033] Fig.10 It is a three-dimensional structural schematic diagram of various components of the blocking mechanism of the present invention.

[0034] The marks in the drawings provided by the present invention are: 1. cabinet, 101. cable room, 1011. grounding switch, 1012. rotating plug, 1013. line arrester, 102. trolley room, 1021. partition board, 1022. isolation plug, 1023. slide rail, 1024. valve, 1025. circuit breaker trolley, 103. busbar room, 2. closing plate, 3. opening and closing door, 4. sliding door, 5. power off unit, 51. smart lock, 511. Bump, 52, power plug board, 53, assembly frame, 54, power plug, 55, contact frame, 56, vertical plate, 57, insulating plate, 58, hinged plate, 6, detection part, 61, top frame, 62, warning light, 63, horizontal plate, 64, detection joint, 65, elastic part 1, 66, push rod, 67, protruding rod, 7, blocking mechanism, 71, push-pull frame, 72, inclined plate, 73, elastic part 2, 74, rack, 75, gear, 8, intelligent charged display device. DETAILED DESCRIPTION

[0035] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0036] In addition, the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. It should be noted that the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] Embodiment: A high-safety high-voltage switch cabinet, such as Figure 1-Figure 5 As shown, including:

[0038] The cabinet 1 is provided with a cable room 101, a trolley room 102 and a bus room 103. The cable room 101 is located at the lower side of the cabinet 1. The trolley room 102 and the bus room 103 are both located above the cable room 101. The trolley room 102 is located in front of the bus room 103. The cable room 101 includes a grounding switch 1011 installed on the rear side wall of the cabinet 1. The grounding switch 1011 is provided with a sensor for detecting the live state.

[0039] Specifically, there are three sensors, which are respectively for the three-phase charged bodies of "A, B, and C" and are in direct contact with the high-voltage charged bodies. They receive the electric field signals of the high-voltage charged bodies and transmit them to the intelligent charged display device 8 for comparison and judgment.

[0040] The closing plate 2 is fixedly arranged on the left front part of the cabinet 1, and the right front part of the cabinet 1 is rotatably provided with an opening and closing door 3 that fits the closing plate 2, and a sliding door 4 located above the opening and closing door 3, so as to spatially separate the various electrical units inside the cabinet 1, and an intelligent live display device 8 is arranged on the closing plate 2, and the sensor on the grounding switch 1011 is electrically connected to the intelligent live display device 8;

[0041] Specifically, when the switch cabinet under test is not energized as a whole, the energized indicator lights of the intelligent energized display device 8 are off, the "operation" indicator light is on (green light), and the locking signal is released at the same time, and the equipment can be operated. The device adopts phase control. When any phase is energized, the circuit sends out an electrical signal to display the corresponding red indicator light and output a forced locking signal. The high-voltage end of the sensor is in direct contact with the high-voltage live body, so that the alternating voltage signal on the live body is accurately and reliably transmitted to the intelligent energized display device 8 through the cable, so that the device can accurately determine whether the live body is energized.

[0042] The power-off unit 5 is arranged between the closing plate 2 and the opening and closing door 3 for remote power-off operation. The power-off unit 5 includes a smart lock 51 rotatably arranged on the opening and closing door 3. The smart lock 51 is electrically connected to the smart live display device 8 so as to perform a forced locking operation with power on. When one of the three phases is energized, the smart live display device 8 forces the smart lock 51 to be locked and transmits a signal to the remote control center to disconnect related equipment to ensure the safety of operators and equipment. When the smart live display device 8 loses control power, the smart live display device 8 outputs a forced locking signal to maintain the locked state. The smart lock 51 is placed in the cabinet 1. A protrusion 511 is fixedly arranged on the end, a power plug board 52 is fixedly arranged on the side of the closing plate 2 facing the inside of the cabinet 1, and an assembly frame 53 is located next to the power plug board 52. A power plug 54 connected to the power plug board 52 is slidably arranged inside the assembly frame 53. When the power plug board 52 is connected to the power plug 54, the cabinet 1 as a whole will be in a live state as the main power switch of the switch cabinet equipment. On the contrary, when the two are disconnected, the power supply of the switch cabinet as a whole will be disconnected. A contact frame 55 that contacts and cooperates with the protrusion 511 is also arranged at the right end of the power plug 54. The right end of the contact frame 55 extends to the side of the protrusion 511, and the protrusion The left and right sides of the block 511 are respectively an arc surface and a plane surface. The side of the right end of the contact frame 55 close to the protrusion 511 is a concave surface adapted to its arc surface. Taking the front view as the main viewing angle, when the protrusion 511 rotates counterclockwise, its arc-shaped contact surface will fit with the concave surface of the contact frame 55, so as to push the power plug 54 to the left, so that the power plug 54 is away from the power plug board 52 to achieve the power-off operation; conversely, when the power plug 54 is about to approach the power plug board 52, since the bottom surface of the right end of the contact frame 55 is a plane, when the protrusion 511 rotates clockwise, its plane will abut against the contact frame 55, thereby pulling the contact frame 55 and the power plug 54 to move rightward. Close to the power plug board 52, the contact frame 55 is used to present the effect of pushing the power plug 54 to move in both directions, so as to realize the connection operation between the two. A vertical plate 56 is also provided on the closing plate 2, which is located between the power plug board 52 and the power plug 54. An insulating plate 57 for isolating the power plug board 52 and the power plug 54 is slidably penetrated on the vertical plate 56. The insulating plate 57 slides back and forth, and a hinged plate 58 is hingedly provided between the insulating plate 57 and the power plug 54. The movement of the power plug 54 can drive the insulating plate 57 to move up and down, so as to ensure thorough processing when the power is off, avoid the risk of live operation, and ensure the safety of the staff.

[0043] like Figure 1 , Figure 2 , Figure 6 and Figure 7As shown, a detection unit 6 is provided on the top of the cabinet 1 for detecting residual electricity. The detection unit 6 includes a top frame 61 provided on the top of the cabinet 1. Red and green warning lights 62 are symmetrically provided on the front side of the top frame 61. A horizontal plate 63 located inside the cabinet 1 is fixedly provided symmetrically on the top frame 61. A detection connector 64 electrically connected to the warning light 62 is slidably penetrated between the left and right ends of the two horizontal plates 63. The detection connectors 64 on both sides are respectively in contact with the adjacent side walls of the cabinet 1. When there is residual electricity inside the cabinet 1, the current will be conducted to the detection connector 64 to make the red light of the warning light 62 turn on. On the contrary, after the residual electricity inside the cabinet 1 is emptied, the green light will be displayed to serve as a warning so as to let the personnel work. In order to prevent the risk of accidental touch and ensure the detection of residual electricity after power failure, an elastic member 65 is provided between the front and rear sides of the detection connector 64 and the two cross plates 63. In the present embodiment, the elastic member 65 is a spring, which provides elastic support for the reset operation of the detection connector 64. Push rods 66 are rotatably provided on the front sides of the two detection connectors 64, and a convex rod 67 that abuts against the sliding door 4 is rotatably provided between the ends of the two push rods 66. When the convex rod 67 abuts against the sliding door 4, the push rods 66 on both sides are changed from a forward bent and arched state to a straight state, thereby pushing the detection connectors 64 on both sides, ensuring that the two can be close to the cabinet 1, thereby ensuring the accuracy of residual electricity detection.

[0044] like Figure 2 , Figure 8-Figure 10 As shown, the cable chamber 101 includes a rotating plug 1012 rotatably arranged between the mounting plates of the earthing switch 1011. The number of plugs of the rotating plug 1012 is consistent with the number and layout of the sockets of the earthing switch 1011 and the two are plugged together. A line lightning arrester 1013 is arranged between the rotating plug 1012 and the bottom of the cabinet 1, which is mainly used for cable access and protection. As a major component of the switch cabinet, it can effectively ensure the stability and safety of the cables in the cabinet 1.

[0045] like Figure 2 , Figure 8-Figure 10As shown, the trolley chamber 102 includes a partition plate 1021 arranged between the left and right side walls of the cabinet 1, and a high-strength track is arranged on the partition plate 1021. An isolation plug 1022 is arranged at the rear end of the partition plate 1021. The busbar side contacts of the isolation plug 1022 are connected to the internal electrical components of the busbar chamber 103. The main contacts on the front side of the isolation plug 1022 are plugged with a circuit breaker trolley 1025, and the circuit breaker trolley 1025 slides with the high-strength track on the partition plate 1021 to achieve power on-off control, and a group of slide rails 1023 are respectively arranged at the upper and lower intervals of the isolation plug 1022, and valves 1024 made of insulating material are slidably arranged between the slide rails 1023 of the same group. When the circuit breaker trolley 1025 is pulled out, the valves 1024 on both sides will automatically close to prevent electric shock accidents.

[0046] like Figure 2 , Fig. 9 and Fig.10 As shown, a blocking mechanism 7 for connecting the rotary plug 1012 and the grounding switch 1011 is provided on the partition plate 1021, and the blocking mechanism 7 includes a push-pull frame 71 that is symmetrically slidably arranged on the partition plate 1021, and the push-pull frame 71 can slide up and down on the partition plate 1021. The rear end of the push-pull frame 71 extends into the cable chamber 101, and an elastic member 73 is provided between the two push-pull frames 71 and the partition plate 1021. In this embodiment, the elastic member 73 is a spring, and an inclined plate 72 is provided on the top of the two push-pull frames 71. The front side of the inclined plate 72 The end is in a forward tilted state, and the inclined plate 72 contacts and cooperates with the circuit breaker trolley 1025 to adapt to and fit the moving operation of the circuit breaker trolley 1025. A rack 74 facing the rotating plug 1012 is provided on the rear end of the push-pull frame 71, and a gear 75 meshing with the rack 74 on the same side is provided at the end of the rotating plug 1012 to drive the rotating plug 1012 to flip and connect with the grounding switch 1011, ensuring that when the circuit breaker trolley 1025 is pulled out, the cabinet 1 as a whole can be immediately in a grounded state by mechanical forced flipping, avoiding the risk of live operation.

[0047] Based on the above-mentioned high-safety high-voltage switchgear, a method for using the high-safety high-voltage switchgear includes the following steps:

[0048] S1. When the switch cabinet needs to be repaired, the power is first turned off, and the intelligent lock 51 is rotated by remote control, so that the arc-shaped contact surface of the protrusion 511 follows the rotation and contacts the contact frame 55, and pushes the contact frame 55 to move toward the inside of the assembly frame 53, thereby driving the power plug-in 54 to slide away from the power plug-in board 52 in the assembly frame 53, so that the power plug-in 54 is separated from the power plug-in board 52, and then the hinged plate 58 is affected by the movement of the power plug-in 54, and pushes the insulating plate 57 to slide forward under the guidance of the vertical plate 56, so as to be spaced between the power plug-in 54 and the power plug-in board 52;

[0049] S2, the sensor on the grounding switch 1011 then detects the internal live state. When the three-phase wiring is still live after the power is cut off, the sensor transmits the signal to the intelligent live display device 8, and the intelligent live display device 8 displays the corresponding red light and forces the smart lock 51 to be locked. On the contrary, when the internal is in a power-free state, the intelligent live display device 8 displays a green light, thereby controlling the smart lock 51 to be unlocked, and the opening and closing door 3 is opened accordingly;

[0050] S3, then observe the warning light 62, the sliding door 4 is still in the closed state, so that the protruding rod 67 is pressed by the closed sliding door 4, forcing the push rods 66 on both sides to be in the straight state, and the detection joints 64 on both sides are pushed by the push rods 66, causing the detection joints 64 to slide to the end position of the horizontal plate 63, and the elastic member 1 65 is in a deformed state, and then the detection joint 64 is attached to the wall surface of the cabinet 1 to detect the residual power of the cabinet 1. If there is residual power around the cabinet 1, the warning light 62 will show a red light. When the warning light 62 shows a green light, it means that the cabinet 1 is free of residual power and the next operation can be carried out;

[0051] S4, then pull the circuit breaker trolley 1025 out of the partition plate 1021, the circuit breaker trolley 1025 is out of contact with the isolation plug 1022, and then the valves 1024 on both sides are closed, and at the same time, the circuits of the busbar chamber 103 and the cable chamber 101 are disconnected. Since the circuit breaker trolley 1025 is pulled out, the inclined plate 72 is not squeezed by the circuit breaker trolley 1025, and then the elastic member 73 is reset, and the push-pull frame 71 moves upward, and the rack 74 meshes with the gear 75 during the upward movement, thereby driving the rotating plug 1012 to flip upward, and the rotating plug 1012 is connected to the grounding switch 1011, so that the grounding switch 1011 is connected to the line lightning arrester 1013, so that the cabinet 1 is in a grounded power-off state, and the switch cabinet can be repaired from then on;

[0052] S5. After the maintenance operation is completed, the sliding door 4 is closed to reset the initial positions of the detection connectors 64 on both sides, and then the circuit breaker trolley 1025 is pushed back into the cabinet 1. Due to the contact between the circuit breaker trolley 1025 and the inclined plate 72, the push-pull frame 71 is pressed down, and the elastic member 73 is deformed accordingly. The downwardly moved rack 74 meshes with the gear 75, thereby driving the rotating plug 1012 to flip downward to disconnect the connection with the grounding switch 1011, and then the opening and closing door 3 is closed, and then the smart lock 51 is operated to rotate in the opposite direction, and contacts with the contact frame 55 through the flat contact surface to pull the power plug 54 and the insulating plate 57 back to their original positions, thereby completing the overall operation process.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A high-safety high-voltage switchgear, comprising: A cabinet (1), wherein the cabinet (1) is provided with a cable chamber (101), a trolley chamber (102) and a bus chamber (103), wherein the cable chamber (101) is located at the lower side of the cabinet (1), the trolley chamber (102) and the bus chamber (103) are both located above the cable chamber (101), and the trolley chamber (102) is located in front of the bus chamber (103), wherein the cable chamber (101) includes a grounding switch (1011) installed on the rear side wall of the cabinet (1), and the grounding switch (1011) is provided with a sensor for detecting a live state; A closing plate (2) is fixedly arranged on one side of the cabinet (1), and an opening and closing door (3) that fits the closing plate (2) and a sliding door (4) located above the opening and closing door (3) are rotatably arranged on the other side of the cabinet (1), and an intelligent charge display device (8) is arranged on the closing plate (2), and a sensor on the grounding switch (1011) is electrically connected to the intelligent charge display device (8); It is characterized by further comprising: A power-off unit (5) is arranged between the closing plate (2) and the opening and closing door (3) for remote power-off operation. The power-off unit (5) comprises an intelligent lock (51) rotatably arranged on the opening and closing door (3). The intelligent lock (51) is electrically connected to the intelligent power-on display device (8) so as to perform a forced locking operation under power. A protrusion (511) is arranged on the end of the intelligent lock (51) placed in the cabinet (1). A power plug board (52) is arranged on the side of the closing plate (2) facing the inside of the cabinet (1), and an assembly frame (53) is located next to the power plug board (52). A power plug-in (54) connected to the power plug-in board (52) is slidably arranged inside the assembly frame (53), and a contact frame (55) contacting and cooperating with the protrusion (511) is also arranged on the power plug-in board (54). A vertical plate (56) located between the power plug-in board (52) and the power plug-in board (54) is also arranged on the closing plate (2), and an insulating plate (57) for isolating the power plug-in board (52) from the power plug-in board (54) is slidably penetrated on the vertical plate (56), and a hinge plate (58) is hingedly arranged between the insulating plate (57) and the power plug-in board (54).

2. A high-safety high-voltage switch cabinet according to claim 1, characterized in that: A detection unit (6) is provided on the top of the cabinet (1) for detecting residual power. The detection unit (6) comprises a top frame (61) provided on the top of the cabinet (1). Red and green warning lights (62) are symmetrically provided on the top frame (61). A horizontal plate (63) located inside the cabinet (1) is symmetrically provided on the top frame (61) front and back. A detection connector (64) electrically connected to the warning light (62) is slidably provided between the two side ends of the horizontal plate (63). The detection connector (64) is in contact with the side wall of the cabinet (1). An elastic member (65) is provided between the two sides of the detection connector (64) and the horizontal plate (63). Push rods (66) are rotatably provided on the front sides of the two detection connectors (64). A convex rod (67) that abuts against the sliding door (4) is rotatably provided between the ends of the two push rods (66).

3. A high-safety high-voltage switch cabinet according to claim 2, characterized in that: The cable chamber (101) further comprises a rotating plug (1012) rotatably arranged between the mounting plates of the grounding switch (1011); the number of plugs of the rotating plug (1012) is consistent with the number and layout of the sockets of the grounding switch (1011), and the two are plugged in and matched; a line lightning arrester (1013) is arranged between the rotating plug (1012) and the bottom of the cabinet (1).

4. A high-safety high-voltage switch cabinet according to claim 3, characterized in that: The trolley chamber (102) comprises a partition plate (1021) arranged between two side walls of the cabinet (1), an isolating plug (1022) is arranged at the rear end of the partition plate (1021), the busbar side contacts of the isolating plug (1022) are connected to the internal electrical components of the busbar chamber (103), the main contacts on the front side of the isolating plug (1022) are plugged with a circuit breaker trolley (1025), and the circuit breaker trolley (1025) is slidably matched with the partition plate (1021), and a group of slide rails (1023) are respectively arranged at intervals above and below the isolating plug (1022), and valves (1024) are slidably arranged between the slide rails (1023) of the same group, and the valves (1024) on both sides can slide and close.

5. A high-safety high-voltage switch cabinet according to claim 4, characterized in that: The partition plate (1021) is provided with a blocking mechanism (7) for connecting the rotary plug (1012) and the grounding switch (1011), the blocking mechanism (7) comprising a push-pull frame (71) symmetrically slidably penetrated through the partition plate (1021), the rear end of the push-pull frame (71) extending into the cable chamber (101), and two elastic members (73) are provided between the two push-pull frames (71) and the partition plate (1021), and the two push-pull frames (71) are provided with a plurality of elastic members (73). The top of the frame (71) is provided with an inclined plate (72), the inclined plate (72) is in contact with the circuit breaker trolley (1025), the rear end of the push-pull frame (71) is provided with a rack (74) facing the rotating plug (1012), and the end of the rotating plug (1012) is provided with a gear (75) meshing with the rack (74) on the same side, so as to drive the rotating plug (1012) to flip and connect with the grounding switch (1011).

6. A high-safety high-voltage switch cabinet according to claim 5, characterized in that: The left and right sides of the protrusion (511) are respectively an arc surface and a plane surface, and are used to cooperate with the contact frame (55) to push the power plug-in (54) to move in both directions.

7. The method for using a high-safety high-voltage switch cabinet according to claim 6, characterized in that: The steps include: S1. When the switch cabinet needs to be inspected and repaired, the power is first turned off, and the intelligent lock (51) is rotated by remote control, so that the arc-shaped contact surface of the protrusion (511) follows the rotation and contacts the contact frame (55), and pushes the contact frame (55) to move toward the inside of the assembly frame (53), thereby driving the power plug (54) to slide away from the power plug board (52) in the assembly frame (53), so that the power plug (54) is separated from the power plug board (52), and then the hinged plate (58) is affected by the movement of the power plug (54), and pushes the insulating plate (57) to slide forward under the guidance of the vertical plate (56), so as to be spaced between the power plug (54) and the power plug board (52); S2, the sensor on the grounding switch (1011) then detects the internal power supply. When the three-phase wiring is still powered after the power is turned off, the sensor transmits a signal to the intelligent power supply display device (8), and the intelligent power supply display device (8) displays a corresponding red light and forcibly locks the intelligent lock (51). On the contrary, when the internal power supply is off, the intelligent power supply display device (8) displays a green light, thereby controlling the intelligent lock (51) to unlock, and the opening and closing door (3) opens accordingly; S3, then observe the warning light (62), the sliding door (4) is still in a closed state, so that the protruding rod (67) is pressed against by the closed sliding door (4), forcing the push rods (66) on both sides to be in a straight state, and the detection connectors (64) on both sides are pushed by the push rods (66), causing the detection connectors (64) to slide to the end position of the horizontal plate (63), and the elastic member (65) is in a deformed state, and then the detection connector (64) is attached to the wall surface of the cabinet (1) to detect the residual power of the cabinet (1). If there is residual power around the cabinet (1), the warning light (62) will display a red light. When the warning light (62) displays a green light, it means that the cabinet (1) is free of residual power and the next operation can be carried out; S4. Then, the circuit breaker trolley (1025) is pulled out from the partition plate (1021), and the circuit breaker trolley (1025) is disconnected from the isolation plug (1022). Then, the valves (1024) on both sides are closed, and at the same time, the circuits of the busbar chamber (103) and the cable chamber (101) are disconnected. As the circuit breaker trolley (1025) is pulled out, the inclined plate (72) is not squeezed by the circuit breaker trolley (1025), and then the elastic Component 2 (73) is reset, and the push-pull frame (71) moves upward accordingly. The rack (74) meshes with the gear (75) during the upward movement, thereby driving the rotary plug (1012) to flip upward, and the rotary plug (1012) is connected to the grounding switch (1011), so that the grounding switch (1011) is connected to the line lightning arrester (1013), so that the cabinet (1) is in a grounded and power-off state, and the switch cabinet can be inspected and maintained from then on; S5. After the inspection operation is completed, the sliding door (4) is closed to reset the initial positions of the detection connectors (64) on both sides, and then the circuit breaker trolley (1025) is pushed back into the cabinet (1). Due to the contact between the circuit breaker trolley (1025) and the inclined plate (72), the push-pull frame (71) is pressed downward, and the elastic member (73) is deformed accordingly. The downwardly moved rack (74) meshes with the gear (75), thereby driving the rotating plug (1012) to flip downward to disconnect the connection with the grounding switch (1011). The opening and closing door (3) is then closed, and then the intelligent lock (51) is operated to rotate in the opposite direction, and the flat contact surface contacts the contact frame (55) to pull the power plug (54) and the insulating plate (57) back to their original positions, thereby completing the overall operation process.

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