A high-safety high-voltage switchgear and its use method

Abstract

The present invention relates to the technical field of switch cabinets, and more specifically, to a high-security high-voltage switch cabinet and a method for using the same. A power-off unit comprises a smart lock rotatably mounted on an opening and closing door, a protrusion being provided on the end of the smart lock placed inside the cabinet, a power strip being provided on the side of the closing plate facing the inside of the cabinet, and an assembly frame being provided next to the power strip. A power plug-in connected to the power strip is slidably provided inside the assembly frame, a contact frame for contacting and cooperating with the protrusion is also provided on the power strip, and a vertical plate located between the power strip and the power plug-in is also provided on the closing plate. The present invention utilizes the remote control of the rotation of the smart lock to control the connection or disconnection between the power strip and the power strip, thereby realizing remote power-off operation, ensuring that the switch cabinet is powered off before maintenance, preventing personal electric shock accidents caused by misoperation such as closing a live earthing switch, and ensuring the personal safety of the staff.

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 method for using the same. Background Art

[0002] High-voltage switchgear is a crucial piece of equipment used in power systems to receive and distribute electrical energy, primarily in power plants and substations. It not only connects and disconnects circuits, enabling control of the power system, but also provides protection by rapidly cutting off power in the event of a system failure, preventing further damage.

[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 lever 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, thereby achieving 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. This brings about a large safety hazard in the maintenance and inspection of the switch cabinet, and it is impossible to ensure the safety of operation. It is even more difficult to operate an electric grounding switch. In view of this, a high-safety high-voltage switch cabinet and its use method are proposed, which can forcibly lock the line in a live state before maintenance, so as to prevent the accident of 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 switchgear 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 to provide a high-safety high-voltage switchgear, including:

[0006] The cabinet is equipped with a cable compartment, a trolley compartment, and a busbar compartment. The cable compartment is located at the bottom of the cabinet, while the trolley compartment and the busbar compartment are both located above the cable compartment, and the trolley compartment is located in front of the busbar compartment. The cable compartment includes a grounding switch installed on the rear wall of the cabinet. The grounding switch is equipped with a sensor for detecting live conditions.

[0007] A closing plate is fixedly provided on one side of the cabinet body, and an opening and closing door that fits in contact with the closing plate and a sliding door located above the opening and closing door are rotatably provided on the other side of the cabinet body. An intelligent charge display device is provided on the closing plate, and a sensor on the grounding switch is electrically connected to the intelligent charge display device.

[0008] The power-off part is arranged between the closing plate and the opening and closing door for remote power-off operation. The power-off part 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 forced locking operation under power. A protrusion is provided on the end of the smart lock placed in the cabinet body. A power socket is provided on the side of the closing plate facing the cabinet body, and an assembly frame is located next to the power socket. A power plug connected to the power socket is slidably provided inside the assembly frame. The power plug is also provided with a contact frame that contacts and cooperates with the protrusion. A vertical plate located between the power socket and the power plug is also provided on the closing plate. An insulating plate for isolating the power socket and the power plug is slidably penetrated on the vertical plate, and a hinged plate is hingedly provided between the insulating plate and the power plug.

[0009] Preferably, a detection part is provided on the top of the cabinet for detecting residual electricity. The detection part includes a top frame arranged on the top of the cabinet, and red and green warning lights are symmetrically provided on the top frame. A horizontal plate located inside the cabinet is symmetrically provided on the top frame front and back. A detection connector electrically connected to the warning light is slidably provided between the two side ends of the horizontal plate, and the detection connector is in contact with the side wall of the cabinet. An elastic part 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 protruding 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. 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 isolation plug is arranged at the rear end of the partition plate, the busbar side contacts of the isolation plug are connected to the internal electrical components of the busbar chamber, the main contacts on the front side of the isolation 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 provided at the upper and lower intervals of the isolation plug, and valves are slidably provided between the slide rails of the same group, and the valves on both sides can slide closed.

[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 that slides symmetrically through the partition plate, and the rear end of the push-pull frame extends into the cable room. Two elastic members are provided between the two push-pull frames and the partition plate, and inclined plates are provided on the top of the two push-pull frames. The inclined plates are in contact with the circuit breaker trolley, and racks facing the rotary plug are provided on the rear end of the push-pull frames. 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 flat surface, which are used to cooperate with the contact frame to make contact and 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 maintenance operations on the switchgear are required, the power is first turned off. The smart lock is rotated by remote control, and the arc-shaped contact surface of the protrusion follows the rotation and contacts the contact frame, pushing the contact frame toward the inside of the assembly frame. This drives the power plug-in to slide away from the power strip within the assembly frame, causing the power plug-in to detach from the power strip. The hinged plate is then affected by the movement of the power plug-in, pushing the insulating plate to slide forward under the guidance of the vertical plate, thereby spacing it between the power plug-in and the power strip.

[0016] S2. The sensor on the grounding switch then detects the internal live state. When there is still live power in the three-phase wiring after the power is cut off, the sensor transmits the signal to the intelligent live display device, which displays the corresponding red light and forcibly locks the smart lock. On the contrary, when there is no power inside, the intelligent live display device displays a green light, which controls the smart lock to unlock and the door opens accordingly.

[0017] S3. Then observe the warning light. The sliding door is still in the 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. The detection connectors on both sides are pushed by the push rods, causing the detection connectors to slide to the end positions of the horizontal plate. The elastic member is in a deformed state, and then the detection connector 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 has no residual power and the next operation can be carried out.

[0018] S4. Then, the circuit breaker trolley is pulled out from the partition plate, and the circuit breaker trolley is disengaged from the isolating plug. Then, the valves on both sides are closed, and the circuits in the busbar compartment and the cable compartment are disconnected. As the circuit breaker trolley is pulled out, the inclined plate is no longer squeezed by the circuit breaker trolley. Then, the elastic member 2 is reset, and the push-pull frame moves upward. During the upward movement, the rack engages with the gear, which drives the rotating plug to flip upward. The rotating plug is connected to the grounding switch, which connects the grounding switch to the line lightning arrester, putting the cabinet in a grounded and de-energized state. From then on, the switch cabinet can be inspected and repaired.

[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, and then drives the rotary plug to flip downward to disconnect the grounding switch. Then the opening and closing door is closed, and the smart lock is operated to rotate in the opposite direction, and the flat contact surface contacts the contact frame to pull the power plug and the insulation board back to their original positions, thereby completing the overall operation process.

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

[0021] 1. The present invention realizes remote power-off operation by setting a power-off part and utilizing the remote control rotation of the smart lock to control the connection or disconnection between the power plug and the power strip, thereby ensuring that the switch cabinet is powered off before maintenance, preventing personal electric shock accidents 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 emergency locked when it is energized, thereby further ensuring the safety of the maintenance personnel's work and ensuring overall safety.

[0022] 2. The setting of the detection part 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, further ensuring the safety of operation.

[0023] 3. The present invention provides a blocking mechanism. When the circuit breaker trolley is pulled out, the rotary plug is automatically connected to the grounding switch, ensuring that the entire circuit is grounded during maintenance and improving electrical safety. 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 diagram of components such as the cabinet, trolley compartment, cable compartment and busbar compartment of the present invention.

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

[0027] Figure 4 This is a schematic diagram of the three-dimensional structure of the assembly frame, power plug and contact frame and other components of the present invention.

[0028] Figure 5 It is a schematic diagram of the three-dimensional structure of the power plug-in, contact frame, riser, insulating plate and hinged plate of the present invention.

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

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

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

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

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

[0034] The markings in the drawings provided by the present invention are: 1. Cabinet, 101. Cable room, 1011. Earthing switch, 1012. Rotary plug, 1013. Line arrester, 102. Cart room, 1021. Partition board, 1022. Isolation plug, 1023. Slide rail, 1024. Valve, 1025. Circuit breaker cart, 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 socket, 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 connector, 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., indicating directions or positional relationships, are 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 limiting the present invention.

[0036] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The technical solutions 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 may be combined with one another as long as they do not conflict with one another.

[0037] Embodiment: A high-safety high-voltage switchgear, such as Figure 1-Figure 5 Shown, including:

[0038] Cabinet 1 is equipped with a cable compartment 101, a trolley compartment 102, and a busbar compartment 103. The cable compartment 101 is located at the bottom of the cabinet 1, and the trolley compartment 102 and busbar compartment 103 are both located above the cable compartment 101. The trolley compartment 102 is located in front of the busbar compartment 103. The cable compartment 101 includes a grounding switch 1011 installed on the rear wall of the cabinet 1. The grounding switch 1011 is equipped 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] A closing plate 2 is fixedly mounted on the left front portion of the cabinet 1, and an opening and closing door 3 is rotatably mounted on the right front portion of the cabinet 1, engaging with the closing plate 2, and a sliding door 4 is positioned above the opening and closing door 3 to spatially separate the electrical units within the cabinet 1. An intelligent charge display device 8 is mounted on the closing plate 2, and a sensor on the grounding switch 1011 is electrically connected to the intelligent charge 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 all 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 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 has electricity.

[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 under power. When one of the three phases is energized, the smart live display device 8 forcibly locks the smart lock 51 and simultaneously 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 inside the cabinet 1. A protrusion 511 is fixedly provided on the end portion, a power board 52 is fixedly provided 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 board 52. A power plug 54 connected to the power board 52 is slidably provided inside the assembly frame 53. When the power 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 is also provided at the right end of the power plug 54 to contact and cooperate with the protrusion 511. 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 flat 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 socket 52 to achieve the power-off operation; conversely, when the power plug 54 is about to approach the power socket 52, since the bottom surface of the right end of the contact frame 55 is flat, when the protrusion 511 rotates clockwise, its flat surface will abut against the contact frame 55, thereby pulling the contact frame 55 and the power plug 54 to move right. Close to the power socket 52, the contact frame 55 is used to push the power plug 54 to move in both directions to realize the connection operation between the two. A vertical plate 56 is also provided on the closing plate 2 between the power socket 52 and the power plug 54. An insulating plate 57 for isolating the power socket 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, ensuring thorough processing when the power is off, avoiding the risk of live operation, and ensuring the safety of the staff.

[0043] like Figure 1 、 Figure 2 、 Figure 6 and Figure 7As shown, a detection part 6 is provided on the top of the cabinet 1 for detecting residual electricity. The detection part 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 front and back of 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 light up. On the contrary, after the residual electricity inside the cabinet 1 is drained, the green light will be displayed to serve as a warning and let the personnel work In order to prevent the risk of accidental touch, the detection and processing of residual electricity after power failure can be ensured. Elastic parts 65 are provided on the front and rear sides of the detection connector 64 and between the two horizontal plates 63. In this embodiment, the elastic part 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 body 1, and ensuring the accuracy of residual electricity detection.

[0044] like Figure 2 、 Figures 8-10 As shown, the cable chamber 101 includes a rotary plug 1012 rotatably arranged between the mounting plates of the earthing switch 1011. The number of plugs of the rotary 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 provided between the rotary 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 、 Figures 8-10As 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 provided on the partition plate 1021. An isolation plug 1022 is provided 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 realize the on-off control of the power, and a group of slide rails 1023 are provided at the upper and lower intervals of the isolation plug 1022. A valve 1024 made of insulating material is slidably provided 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 、 Figure 9 and Figure 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. The blocking mechanism 7 includes a push-pull frame 71 that is symmetrically slidably provided on the partition plate 1021. 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. 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 is provided. 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 rotary 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 rotary plug 1012 to drive the rotary 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 grounded 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. The smart lock 51 is rotated by remote control, and the arc-shaped contact surface of the protrusion 511 follows the rotation and contacts the contact frame 55, pushing the contact frame 55 toward the inside of the assembly frame 53. This drives the power plug-in 54 to slide away from the power board 52 within the assembly frame 53, so that the power plug-in 54 is separated from the power board 52. Then, the hinged plate 58 is affected by the movement of the power plug-in 54, pushing the insulating plate 57 to slide forward under the guidance of the vertical plate 56, so that it is spaced between the power plug-in 54 and the power board 52.

[0049] S2. The sensor on the grounding switch 1011 then detects the internal power supply. When the three-phase wiring is still charged after the power is cut off, the sensor transmits a signal to the intelligent power supply display device 8, which displays a corresponding red light and forcibly locks the smart 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 smart lock 51 to unlock, and the door 3 is opened.

[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 a straight state. 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. The elastic member 1 65 is in a deformed state. 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 show red. When the warning light 62 shows green, it means that the cabinet 1 has no residual power and the next operation can be carried out.

[0051] S4. Then, the circuit breaker trolley 1025 is pulled out from the partition plate 1021. The circuit breaker trolley 1025 is disengaged from the isolation plug 1022, and the valves 1024 on both sides are closed. At the same time, the circuits in 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 no longer squeezed by the circuit breaker trolley 1025. Then, the elastic member 73 is reset, and the push-pull frame 71 moves upward. The rack 74 engages with the gear 75 during the upward movement, thereby driving the rotary plug 1012 to flip upward. 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 body 1 is in the grounded and power-off state. From then on, the switch cabinet maintenance operation can be carried out;

[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 downward-moving rack 74 engages with the gear 75, and then drives the rotary plug 1012 to flip downward to disconnect the grounding switch 1011, and then close the opening and closing door 3, and then operate the smart lock 51 to rotate in the opposite direction, and make contact 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 solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions 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 busbar chamber (103), wherein the cable chamber (101) is located at the lower side of the cabinet (1), the trolley chamber (102) and the busbar chamber (103) are both located above the cable chamber (101), and the trolley chamber (102) is located in front of the busbar 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 condition; A closing plate (2) is fixedly arranged on one side of the cabinet (1), and an opening and closing door (3) that is in contact with 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 provided 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 provided 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 provided on the opening and closing door (3). The smart lock (51) is electrically connected to the smart electrified display device (8) so as to perform a forced locking operation under electrification. A protrusion (511) is provided on the end of the smart lock (51) placed in the cabinet (1). A power plug board (52) is provided 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 provided inside the assembly frame (53), and a contact frame (55) contacting and cooperating with the protrusion (511) is further provided 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 further provided on the closing plate (2). 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 provided between the insulating plate (57) and the power plug-in board (54).

2. A high-safety high-voltage switchgear according to claim 1, characterized in that: The top of the cabinet (1) is provided with a detection part (6) for detecting residual electricity. The detection part (6) includes a top frame (61) provided on the top of the cabinet (1), and 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 front and back of the top frame (61). A detection connector (64) electrically connected to the warning light (62) is slidably provided between the two side ends of the horizontal plate (63), and the detection connector (64) is in contact with the side wall of the cabinet (1). An elastic member (65) is provided between both sides of the detection connector (64) and the horizontal plate (63); a push rod (66) is rotatably provided on the front side of the two detection connectors (64), and a protruding rod (67) that abuts and cooperates with the sliding door (4) is rotatably provided between the ends of the two push rods (66).

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

4. A high-safety high-voltage switchgear 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 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); the circuit breaker trolley (1025) and the partition plate (1021) are slidably matched; and a group of slide rails (1023) are respectively arranged at intervals above and below the isolation plug (1022); a valve (1024) is slidably arranged between the slide rails (1023) of the same group, and the valves (1024) on both sides can be slid and closed.

5. A high-safety high-voltage switchgear 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 penetrating 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 symmetrically slidably penetrating the cable chamber (101), the rear end of the push-pull frame (71) extending into the cable chamber (101), and the two push-pull frames (71) and the partition plate (102 ... The top of each frame (71) is provided with an inclined plate (72), and the inclined plate (72) contacts and cooperates with the circuit breaker trolley (1025). The rear end of each push-pull frame (71) is provided with a rack (74) facing the rotary plug (1012). The end of each rotary plug (1012) is provided with a gear (75) meshing with the rack (74) on the same side to drive the rotary plug (1012) to flip and connect with the grounding switch (1011).

6. A high-safety high-voltage switchgear 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 switchgear according to claim 6, characterized in that: The following steps are involved: S1. When the switch cabinet needs to be repaired, the power is first turned off. The intelligent lock (51) is rotated by remote control, and the arc-shaped contact surface of the protrusion (511) follows the rotation and contacts the contact frame (55), and pushes the contact frame (55) 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 that it is spaced between the power plug (54) and the power plug board (52); S2. Then, the sensor on the grounding switch (1011) 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). The intelligent live display device (8) displays a corresponding red light and forcibly locks the intelligent lock (51). On the contrary, when the internal is in a no-power state, the intelligent live display device (8) displays a green light, thereby controlling the intelligent lock (51) to unlock, and the opening and closing door (3) is opened accordingly. 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 against by the closed sliding door (4), forcing the push rods (66) on both sides to be in the 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 show a red light. When the warning light (62) shows a green light, it means that the cabinet (1) has released the 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). The circuit breaker trolley (1025) is disconnected from the isolation plug (1022). Then, the valves (1024) on both sides are closed. 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). Then, the inclined plate (72) is elastically closed. Component 2 (73) is reset, and the push-pull frame (71) moves upward accordingly. The rack (74) engages with the gear (75) during the upward movement, thereby driving the rotary plug (1012) to flip upward. 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 repaired 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 downward-moving rack (74) is meshed with the gear (75), thereby driving the rotary plug (1012) to flip downward to disconnect the connection with the grounding switch (1011). The opening and closing door (3) is then closed, and the smart 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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