Intelligent safety protection device for switch cabinet

Abstract

The invention relates to the technical field of safety protection of power system equipment, in particular to an intelligent safety protection device for a switch cabinet, which comprises a cabinet body, the cabinet body is divided into a four-chamber structure, the upper part of the cabinet body is a bus chamber and is internally provided with a wire row template, the middle part of the cabinet body is a circuit breaker chamber and is connected with the bus chamber through a bus joint end plate, and the lower part of the cabinet body comprises two chambers. The independent sealing structure of the four chambers of the cabinet body is combined with condensation and drying circulation processing of the circulation collection assembly on moisture, moisture permeation among the chambers is effectively avoided, and the risk of insulation degradation is reduced. A humidity sensor monitors humidity distribution of each chamber in real time, triggers a generator to drive fan blades to accelerate airflow circulation and prevent local condensation, and triggers a sound-light alarm when the water level of a collecting pipe exceeds the limit to avoid short circuit caused by overflow of condensate water; the environment sealing assembly is in linkage with the traction rod through the limiting guide frame, an opening of the heat dissipation cover can be rapidly closed when external dust or humidity is too high, an internal circulation mode is switched, external pollution is isolated, and the operation safety of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power system equipment safety protection, and in particular to an intelligent safety protection device for a switch cabinet. Background Art

[0002] A switchgear is a complete set of power distribution equipment with a circuit breaker as its core, in which high and low voltage electrical components are assembled in a metal cabinet according to the main electrical wiring scheme. It is responsible for the opening and closing, control and protection tasks during the power generation, transmission, distribution and energy conversion processes of the power system.

[0003] In power systems, high-voltage switchgear, as core equipment for power distribution, has a direct impact on grid security through its operational reliability. According to the State Grid Corporation of China's 2023 Annual Report on High-Voltage Equipment Failure Statistics, approximately 68% of switchgear failures are caused by moisture infiltration, arc short circuits, and fire spread, while secondary disasters due to inadequate protection account for as much as 45%.

[0004] Currently, some switchgear cabinets rely on natural ventilation or a single dehumidifier for passive humidity control. In actual operation, humidity levels vary significantly across the cabinet. The pressure difference between the busbar compartment and the cable compartment due to heat dissipation requirements allows moisture to penetrate through gaps, leading to condensation in key areas such as busbar joints and circuit breaker contacts.

[0005] Therefore, a switch cabinet intelligent safety protection device is specially designed to solve the above technical problems. Summary of the Invention

[0006] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides an intelligent safety protection device for a switch cabinet.

[0007] The technical solution is: an intelligent safety protection device for a switch cabinet, including a cabinet body, which is divided into a four-chamber structure, the upper part of which is a busbar chamber with a built-in wire row template, the middle part is a circuit breaker chamber and is connected to the busbar chamber through a busbar joint end plate, and the lower part contains two chambers. The relay chamber is below the circuit breaker chamber, and the cable chamber is below the busbar chamber and is provided with an independent sealed door on the outside. A frame is provided inside the cabinet body to support each chamber, and the front of the cabinet body is equipped with three cabinet doors. The upper cabinet door contains an observation window. Guide rails are installed on both sides of the lower frame of the busbar joint end plate area, and a guide seat with a contact block is slidingly provided on the guide rail. A guide protrusion is provided on the outer side of the guide rail, and a guide rod is provided on both sides of the busbar joint end plate. The outside of the guide protrusion is slidably connected with an inclined pull rod, and the pull rod is connected to the guide protrusion. A spring is provided between the rods, and the hinged structure at the lower part of the pull rod is in sliding contact with the contact block of the guide seat. Gears are rotatably installed on both sides of the middle of the front end plate of the busbar joint, and staggered racks are slidingly set on both sides of the gear, and the racks are engaged with corresponding gears. Baffles are slidingly set between the guide rods on both sides to vertically cover the busbar joint, and the two ends of the upper baffle are connected to the upper rack, and the two ends of the lower baffle are connected to the lower rack. The upper end of the pull rod is hinged to the upper end of the upper rack, and the middle of the upper part of the cabinet is connected to a heat dissipation cover, and multiple humidity sensors are symmetrically installed on the side of the frame. A smoke detector is installed on the upper part of the circuit breaker room. A circulating collection component for collecting and treating moisture is laid in a ring on the outside of the cabinet, and an environmental sealing component with a closed heat dissipation path is provided on the outside of the heat dissipation cover.

[0008] Preferably, the circulation collection assembly includes a delivery pipe, a dehumidifier, a collecting pipe, a water level monitor, a sealing plug, a dryer and a discharge pipe. The delivery pipe is laid in a circular rectangular shape on the outer periphery of the front of the cabinet. A cylindrical sealing structure is provided on the upper part of the delivery pipe. The lower part of the delivery pipe is connected to the relay room. Dehumidifiers are installed on both side walls of the relay room and the cabinet. The dehumidifier is connected to the delivery pipe. Collection pipes are provided on both sides of the lower part of the cabinet. The collection pipe is connected to the delivery pipe. A water level monitor is installed on the upper part of the collection pipe. Sealing plugs are clamped at the water outlet on the lower side of the collection pipe. A dryer is installed on the side of the dehumidifier. The lower part of the cylindrical part of the delivery pipe is connected to the discharge pipe, and the discharge pipe extends into the upper part of the busbar room.

[0009] Preferably, the circulation collection assembly further includes a motor and fan blades. A motor with an output shaft facing downward is installed on the upper part of the cylindrical portion of the conveying pipe, and fan blades are installed on the motor output shaft, and the fan blades are located inside the cylindrical portion.

[0010] Preferably, the environmental sealing assembly includes a shielding plate, a cylinder 1, a push frame, a limit guide frame and a pulling rod. The upper part of the heat dissipation area on both sides of the heat dissipation cover is hinged with a shielding plate. A cylinder 1 with the driving end facing downward is installed on one side of the upper part of the heat dissipation cover. A push frame is installed on the driving end of the cylinder 1. The two ends of the push frame extend downward, and an inclined limit guide frame is provided on the extended part. The two ends of the hinge shaft on the upper part of the shielding plate are fixed with outward-extending pull rods, and the lower part of the same side of the two pull rods is rotatably and slidably connected to the corresponding limit guide frame.

[0011] As a preference, an emergency fire-fighting assembly is also included. The emergency fire-fighting assembly is provided on the upper part and inside the cabinet. The emergency fire-fighting assembly includes a fire extinguishing tank, a piston plate, a second spring, a fire extinguishing agent conduit, a two-way pump pipe, a blocking valve, a linkage, a lifting rod, a spray pipe and a diffusion nozzle. A fire extinguishing tank for storing fire extinguishing agent is installed on one side of the upper part of the cabinet. A piston plate is slidingly provided inside the fire extinguishing tank. A second spring is provided between the piston plate and the fire extinguishing tank. One end of the fire extinguishing tank is connected to a fire extinguishing agent conduit, and the fire extinguishing agent conduit extends to the side of the cabinet. Extension, two close two-way pump pipes are installed on the extension, and a blocking valve is rotatably provided inside the two-way pump pipe. A flow hole is opened in the blocking valve, and the sealing end of the blocking valve protrudes outward, and a linkage is provided on the protruding part. A lifting rod is rotatably provided on the upper part of the linkage, and the two lifting rods are respectively rotated and slidably connected to the lower parts of the two pulling rods corresponding to the other side. A symmetrical spray pipe is installed on one side of the middle part of the cabinet body, and the spray pipe is connected to the two-way pump pipe. A plurality of diffusion nozzles are symmetrically connected along the axial direction on the spray pipe.

[0012] Preferably, the outlet end of the diffusion nozzle is designed to be conical.

[0013] Preferably, a smoke recovery component is also included. A smoke recovery component is provided below the upper exhaust pipe in the cabinet body. The smoke recovery component includes a recovery tank, a loop pipe, a second cylinder, a closing joint and an output pump pipe. A recovery tank is installed below the upper exhaust pipe in the cabinet body. The lower part of the recovery tank is connected to the loop pipe. The loop pipe inlet and the exhaust pipe outlet are arranged opposite to each other, and the loop pipe inlet and the exhaust pipe outlet are both provided with closing joints on the outside. When the two closing joints are closed, a closed conveying pipeline is formed, wherein the closing joint at the loop pipe inlet is slidably connected to it, and a second cylinder with a driving end facing upward is installed on the side of the recovery tank. The driving end of the second cylinder is connected to the side of the closing joint of the loop pipe. The other side of the recovery tank is connected to the output pump pipe, and the tubular portion of the output pump pipe extends out of the cabinet body.

[0014] Preferably, a short-circuit protection component is further included. The short-circuit protection component is provided on the upper part of the busbar joint end plate. The short-circuit protection component includes a lifting piece, a rotating frame, an arc extinguishing cover and a torsion spring. Lifting pieces are provided at both ends of the upper baffle. A contact inclined surface is provided on the upper end of the lifting piece. The upper part of the busbar joint end plate is hingedly connected to the rotating frame. The lifting piece is in sliding contact with the rotating frame to lift the rotating frame to rotate it. The arc extinguishing cover is installed inside the rotating frame. The outside of the hinged shaft between the lifting frame and the two ends of the baffle is provided with a torsion spring.

[0015] 1. The cabinet's four independently sealed chambers, combined with the condensation and drying cycles of the circulating collection component, effectively prevent moisture penetration between chambers and reduce the risk of insulation degradation. A humidity sensor monitors the humidity distribution in each chamber in real time, triggering the motor to drive the fan blades to accelerate air circulation and prevent local condensation. At the same time, an audible and visual alarm is triggered when the water level in the collection pipe exceeds the limit, preventing condensation from overflowing and causing a short circuit. The environmental sealing component is linked to the pull rod through a limit guide frame, which can quickly close the heat dissipation cover opening when external dust or humidity is too high, switching to internal circulation mode to isolate external contamination and improve the safety of the device operation.

[0016] 2. When the trolley is pushed in, the guide seat, pull rod and gear rack system force the baffle to expand, completely exposing the busbar connector; if the trolley is not in place, the baffle closes to block live operation and achieve physical locking.

[0017] 3. The emergency fire-fighting component triggers the closing valve to open through the linkage and the poppet rod. The second spring pushes the piston plate to release the fire extinguishing agent, and the conical diffusion nozzle covers it, which can effectively extinguish the initial fire source and prevent the fire from spreading.

[0018] 4. The smoke recovery component closes the loop pipe in the event of a fire. The combustion gas enters the recovery tank through the loop pipe for adsorption treatment and is safely discharged to prevent the spread of toxic gases and threaten personnel safety.

[0019] 5. The short-circuit protection component uses the baffle to move and trigger the rotating frame to cover the arc point, so that the arc extinguishing process responds quickly and can prevent the high temperature of the arc from igniting the materials in the cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the assembly structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the frame, heat dissipation cover, shielding plate and other components of the present invention.

[0022] Figure 3 It is a plan view of the busbar chamber, circuit breaker chamber and relay chamber structures of the present invention.

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the frame, busbar joint end plates, guide rails and other components of the present invention.

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the busbar joint end plate, lifting rod, torsion spring and other components of the present invention.

[0025] Figure 6 It is a three-dimensional structural diagram of the cabinet, recovery tank, discharge pipe and other components of the present invention.

[0026] Figure 7It is a schematic diagram of the three-dimensional structure of the components such as the delivery pipe, dehumidifier and dryer of the present invention.

[0027] Figure 8 It is a schematic cross-sectional view of the cabinet, delivery pipe, motor and other components of the present invention.

[0028] Figure 9 It is a schematic diagram of the three-dimensional structure of the components such as the delivery pipe, water level monitor and collection pipe of the present invention.

[0029] Figure 10 It is a schematic cross-sectional view of the cabinet, heat dissipation cover, recovery tank and other components of the present invention.

[0030] Figure 11 This is a schematic cross-sectional view of the delivery pipe, closing joint and cylinder components of the present invention.

[0031] Figure 12 It is a schematic diagram of the three-dimensional structure of the heat dissipation cover, electric cylinder 1 and push frame of the present invention.

[0032] Figure 13 It is a schematic cross-sectional view of the cabinet, spray pipe, fire extinguisher and other components of the present invention.

[0033] Figure 14 It is a schematic diagram of the three-dimensional structure of the spray pipe and diffusion nozzle of the present invention.

[0034] Figure 15 It is a schematic cross-sectional view of the cabinet, heat dissipation cover, fire extinguisher and other components of the present invention.

[0035] Figure 16 It is a schematic cross-sectional view of the components of the present invention, such as the two-way pump pipe, the blocking valve and the linkage.

[0036] Markings in the accompanying drawings: 1-cabinet, 100-busbar chamber, 101-circuit breaker chamber, 102-relay chamber, 103-line template, 104-cable chamber, 11-frame, 12-cabinet door, 13-sealed door, 14-busbar joint end plate, 2-guide rail, 20-guide seat, 21-guide rod, 22-pull rod, 23-spring 1, 24-gear, 25-rack, 26-baffle, 3-heat dissipation cover, 4-humidity sensor, 40-smoke detector, 41-delivery pipe, 42-dehumidifier, 421-collection pipe, 422-water level monitor, 423-sealing plug, 4 3-dryer, 44-motor, 441-fan blade, 45-discharge pipe, 5-shielding plate, 51-cylinder one, 52-push frame, 521-limit guide frame, 53-pull rod, 6-fire extinguishing tank, 60-piston plate, 601-spring two, 61-fire extinguishing agent conduit, 62-two-way pump pipe, 63-blocking valve, 64-linkage, 65-lifting rod, 66-spraying pipe, 67-diffusion nozzle, 7-recovery tank, 71-loop pipe, 72-cylinder two, 73-closing joint, 74-output pump pipe, 8-lifting piece, 81-rotating frame, 82-arc extinguishing cover, 83-torsion spring. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] Embodiment: A switch cabinet intelligent safety protection device, such as Figures 1-13 and Figure 15As shown, the cabinet 1 includes a four-chamber structure, the upper part of which is a busbar chamber 100 with a built-in wire row template 103, the middle part is a circuit breaker chamber 101 and is connected to the busbar chamber 100 through a busbar joint end plate 14, and the lower part contains two chambers. Below the circuit breaker chamber 101 is a relay chamber 102, and below the busbar chamber 100 is a cable chamber 104 with an independent sealed door 13. The cabinet 1 is the core bearing structure and is divided into four chambers (busbar chamber 100, circuit breaker chamber 101, relay chamber 102, and cable chamber 104). The frame 11 fixes the partitions of each chamber by bolts. To achieve functional zoning and physical isolation and prevent cross-chamber contamination from spreading, a frame 11 is provided inside the cabinet 1 to support each chamber. The front of the cabinet 1 is equipped with three cabinet doors 12. The upper cabinet door 12 contains an observation window. Guide rails 2 are installed on both sides of the lower frame 11 in the busbar joint end plate 14 area. A guide seat 20 with a contact block is slidingly provided on the guide rail 2. The guide rail 2 and the guide seat 20 guide the linear movement of the trolley when it is pushed in. A guide protrusion is provided on the outer side of the guide rail 2. Guide rods 21 are provided on both sides of the busbar joint end plate 14. The outside of the guide protrusion is slidably connected with an inclined pull rod 22. The pull rod 22 is connected to the guide A spring 23 is provided between the protruding rods, and the hinged structure at the bottom of the pull rod 22 is in sliding contact with the contact block of the guide seat 20. Gears 24 are rotatably installed on both sides of the middle of the front of the busbar joint end plate 14. Staggered racks 25 are slidably provided on both sides of the gear 24, and the racks 25 are engaged with the corresponding gears 24. Baffles 26 are slidably provided between the guide rods 21 on both sides to vertically cover the busbar joint to prevent foreign matter from intruding or arc diffusion. The two ends of the upper baffle 26 are connected to the upper rack 25, and the two ends of the lower baffle 26 are connected to the lower rack 25. The upper end of the pull rod 22 is hinged to the upper end of the upper rack 25 The pull rod 22 and the spring 1 23 convert the linear motion of the guide seat 20 into the lifting motion of the rack 25. The spring 1 23 provides the reset force. The gear 24 and the rack 25 are engaged to realize the bidirectional linkage expansion of the baffle 26 to ensure that the busbar joint is completely exposed or closed. The middle of the upper part of the cabinet 1 is connected to the heat dissipation cover 3. A plurality of humidity sensors 4 are symmetrically installed on the side of the frame 11. A smoke detector 40 is installed on the upper part of the circuit breaker chamber 101. The outside of the cabinet 1 is annularly laid with a circulating collection component for collecting and processing moisture. The outside of the heat dissipation cover 3 is provided with an environmental sealing component with a closed heat dissipation path.

[0040] like Figure 1 、 Figure 2 and Figures 6-11As shown, the circulation collection assembly includes a delivery pipe 41, a dehumidifier 42, a collection pipe 421, a water level monitor 422, a sealing plug 423, a dryer 43 and a discharge pipe 45. The front periphery of the cabinet 1 is laid with a delivery pipe 41 in a circular rectangular shape. The upper part of the delivery pipe 41 is provided with a cylindrical sealing structure. The lower part of the delivery pipe 41 is connected to the relay chamber 102. The relay chamber 102 and the two side walls of the cabinet 1 are both installed with dehumidifiers 42. The dehumidifier 42 dehumidifies by semiconductor condensation. The dehumidifier 42 is connected to the delivery pipe 41. The collection pipe 42 is welded on both sides of the lower part of the cabinet 1. 1. The collecting pipe 421 is connected to the delivery pipe 41. The delivery pipe 41 forms a moisture delivery channel and cooperates with the dehumidifier 42 to realize the directional collection of condensed water. A water level monitor 422 is installed on the upper part of the collecting pipe 421. The collecting pipe 421 and the water level monitor 422 are used to collect condensed water and monitor the water level in real time, triggering an alarm to prevent overflow. The water outlet on the lower side of the collecting pipe 421 is clamped with a sealing plug 423. A dryer 43 is installed on the side of the dehumidifier 42. The lower part of the cylindrical portion of the delivery pipe 41 is connected to a discharge pipe 45, which extends into the upper part of the busbar chamber 100.

[0041] like Figure 1 and Figure 6-Figure 8 As shown, the circulation collection component also includes a motor 44 and fan blades 441. The motor 44 with the output shaft facing downward is installed on the upper part of the cylindrical part of the delivery pipe 41 by bolts. The fan blades 441 are connected to the output shaft of the motor 44 through a keyway. The fan blades 441 are located inside the cylindrical part. When the motor 44 and the fan blades 441 are in operation, they can drive the air circulation and accelerate the extraction of wet gas and the return of dry gas.

[0042] like Figure 1 、 Figure 2 、 Figure 12 、 Figure 13 and Figure 15 As shown, the environmental sealing assembly includes a shielding plate 5, a cylinder 51, a push frame 52, a limit guide frame 521 and a pull rod 53 to prevent dust or moisture from invading. The upper parts of the heat dissipation areas on both sides of the heat dissipation cover 3 are hinged with shielding plates 5 through hinges, and the surface of the shielding plates 5 can be covered with fluororubber sealing strips. The shielding plates 5 close the heat dissipation ports of the heat dissipation cover 3. A cylinder 51 with a driving end facing downward is installed on one side of the upper part of the heat dissipation cover 3 to provide a linear driving force. A push frame 52 is installed on the driving end of the cylinder 51, and both ends of the push frame 52 extend downward. An inclined limit guide frame 521 is provided on the extended part. Both ends of the hinge shaft on the upper part of the shielding plate 5 are fixed with outwardly extending pull rods 53. The lower parts of the same side of the two pull rods 53 are respectively rotatably and slidably connected with the corresponding limit guide frames 521. The limit guide frame 521 and the pull rod 53 convert the linear motion of the cylinder 51 into the rotational motion of the shielding plate 5.

[0043] like Figure 1 、 Figure 2 and Figure 13-16As shown, an emergency fire-fighting assembly is also included. An emergency fire-fighting assembly is provided on the upper part and inside of the cabinet 1. The emergency fire-fighting assembly includes a fire extinguishing tank 6, a piston plate 60, a second spring 601, a fire-extinguishing agent conduit 61, a two-way pump pipe 62, a blocking valve 63, a linkage 64, a poppet rod 65, a spray pipe 66 and a diffusion nozzle 67. A fire-extinguishing tank 6 for storing fire-extinguishing agent is installed on one side of the upper part of the cabinet 1. A piston plate 60 is slidingly provided inside the fire-extinguishing tank 6. The piston plate 60 slides and seals with the inner wall of the fire-extinguishing tank 6. A second spring 601 is provided between the piston plate 60 and the fire-extinguishing tank 6. The second spring 601 provides injection power. One end of the fire-extinguishing tank 6 is connected to a fire-extinguishing agent conduit 61. The fire-extinguishing agent conduit 61 extends to the side of the cabinet 1. Two close two-way pump pipes 62 are installed on the extension. The two-way pump pipe 62 is internally rotated. A shut-off valve 63 is provided, and a flow hole is opened in the shut-off valve 63. The sealing end of the shut-off valve 63 protrudes outward, and a linkage part 64 is provided on the protruding part. A lifting rod 65 is rotatably provided on the upper part of the linkage part 64. The two lifting rods 65 are respectively rotated and slidably connected with the lower parts of the two pull rods 53 corresponding to the other side. The dual-channel design of the two-way pump pipe 62 and the shut-off valve 63 ensures redundant injection of the fire extinguishing agent. The shut-off valve 63 is mechanically linked with the lifting rod 65 through the linkage part 64 to realize rapid opening of the valve. A symmetrical spray pipe 66 is installed on one side of the middle part of the cabinet 1. The spray pipe 66 is connected to the two-way pump pipe 62. A plurality of diffusion nozzles 67 are symmetrically connected along the axial direction on the spray pipe 66. The outlet end of the diffusion nozzle 67 is conical in design. The conical outlet design can expand the coverage radius of the fire extinguishing agent and penetrate hidden fire sources.

[0044] like Figure 6 and Figure 10 As shown, it also includes a smoke recovery component. A smoke recovery component is provided below the upper portion of the cabinet 1 corresponding to the exhaust pipe 45. The smoke recovery component includes a recovery tank 7, a loop pipe 71, a cylinder 2 72, a closing joint 73 and an output pump pipe 74. The upper portion of the cabinet 1 corresponding to the exhaust pipe 45 is installed with a recovery tank 7 by bolts below. The recovery tank 7 is an existing device with a filtering and purification structure. The lower portion of the recovery tank 7 is connected to a loop pipe 71. The inlet of the loop pipe 71 is arranged opposite to the discharge port of the exhaust pipe 45, and the inlet of the loop pipe 71 is arranged opposite to the discharge port of the exhaust pipe 45. 5. A closing joint 73 is provided on the outside of each discharge port. When the two closing joints 73 are closed, a closed conveying pipe 41 is formed. The closing joint 73 at the entrance of the loop pipe 71 is slidably connected to it. A second cylinder 72 with its driving end facing upward is installed on the side of the recovery tank 7. The driving end of the second cylinder 72 is connected to the side of the closing joint 73 of the loop pipe 71. The other side of the recovery tank 7 is connected to an output pump pipe 74. The tubular portion of the output pump pipe 74 extends out of the cabinet 1. The closing joint 73 is driven by the second cylinder 72 to connect to form a closed smoke exhaust channel.

[0045] like Figure 4 and Figure 5As shown, a short-circuit protection component is also included. A short-circuit protection component is provided on the upper part of the busbar joint end plate 14. The short-circuit protection component includes a lifting piece 8, a rotating frame 81, an arc extinguishing cover 82 and a torsion spring 83. Lifting pieces 8 are welded at both ends of the upper baffle 26. A contact inclined surface is provided on the upper end of the lifting piece 8. The upper part of the busbar joint end plate 14 is hinged with a rotating frame 81. The lifting piece 8 is in sliding contact with the rotating frame 81 to lift the rotating frame 81 to rotate it. The arc extinguishing cover 82 is installed inside the rotating frame 81 by a snap. When the baffle 26 moves, the lifting piece 8 pushes the rotating frame 81 to rotate so that the arc extinguishing cover 82 covers the arc point. The outside of the hinged shaft at both ends of the lifting frame and the baffle 26 is provided with a torsion spring 83. The torsion spring 83 drives the rotating frame 81 to reset after the arc is extinguished to ensure that the arc extinguishing cover 82 is out of the energized area when the baffle 26 is closed.

[0046] When the switch cabinet is in operation, the humidity sensor 4 monitors the humidity distribution inside the cabinet 1 in real time. When the humidity is too high, the circulation collection component is activated, and the moisture is pumped to the semiconductor dehumidifier 42 through the annular conveying pipe 41, cooled to below the dew point to achieve condensation and dehumidification, and then dried by the dryer 43. The dry gas is introduced into the busbar chamber 100 through the discharge pipe 45 to assist in heat dissipation and maintain air pressure balance. The condensed water is collected in the collection pipe 421. When the water level monitor 422 detects that the water level exceeds the standard, an audible and visual alarm is triggered, and the sealing plug 423 needs to be manually opened to drain the water. At the same time, the motor 44 drives the fan blades 441 to accelerate the air circulation in the cabinet to prevent local condensation from causing insulation degradation.

[0047] During normal operation, the heat dissipation vents on both sides of the heat dissipation cover 3 remain open, and heat is discharged through natural convection. If the external environment is dusty or the humidity is too high, the environmental sealing component is activated, and the cylinder 1 51 pushes the push frame 52 downward, causing the limit guide frame 521 to drive the pull rod 53 to rotate, thereby driving the shielding plate 5 to close the heat dissipation vents, forming a closed environment. In the closed state, the temperature and humidity are maintained by the circulation collection component to prevent the intrusion of external pollution. When the cylinder 1 51 is reset, the limit guide frame 521 releases the constraint on the pull rod 53, and the shielding plate 5 automatically returns to the open state under the action of gravity.

[0048] When the trolley is pushed in, the guide seat 20 acts as a contact medium and slides along the guide rail 2. The guide seat 20 first contacts the hinged structure at the bottom of the pull rod 22, causing the pull rod 22 to slide along the guide protrusion and squeezing the spring 1 23, forcing the pull rod 22 to gradually rotate and stand upright from the tilted state. During the uprighting process of the pull rod 22, the rack 25 connected to its upper part slides up accordingly, and drives the opposite rack 25 on the other side to slide down through the engagement of the gear 24, forming a two-way linkage. When the racks 25 on both sides slide up and down at the same time, they will pull the baffle 26 to expand to both sides along the guide rod 21, completely exposing the busbar joint. When the trolley is not fully pushed into the working position, the hinged structure of the pull rod 22 is not fully upright, the rack 25 has insufficient travel, and the baffle 26 remains closed, forcibly blocking the live operation.

[0049] After the smoke detector 40 detects a fire signal, the linkage 64 pulls the poppet 65, opening the flow hole of the blocking valve 63 and releasing the fire extinguishing agent channel. Under the influence of pressure, the second spring 601 extends and pushes the piston plate 60, pumping the fire extinguishing agent through the fire extinguishing agent conduit 61 and the two-way pump pipe 62 into the spray pipe 66. The conical diffusion nozzle 67 evenly covers the fire source with high pressure. At the same time, the smoke recovery component is activated, and the second cylinder 72 drives the closing joint 73 to connect with the discharge pipe 45, forming a closed loop. The combustion gas enters the recovery tank 7 through the loop pipe 71, where it is adsorbed and purified, and is safely discharged through the output pump pipe 74. The environmental sealing component closes the heat dissipation port of the heat dissipation cover 3, and the circulation collection component switches to the forced exhaust mode, accelerating the discharge of toxic gases and preventing oxygen from supporting combustion.

[0050] To avoid abnormal discharge of the busbar joint, the upper rack 25 will drive the lifting part 8 to move when it slides up. The lifting part 8 will push the rotating frame 81 to drive the arc extinguishing cover 82 to cover the arc point and force the arc to be extinguished. After the arc is extinguished, the arc extinguishing cover 82 is reset by the torsion spring 83 and cooperates with the baffle 26 to close after the trolley withdraws to restore the isolation state.

[0051] While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all modifications and equivalent structures and functions.

Claims

1. An intelligent safety protection device for a switch cabinet, characterized in that: The cabinet (1) comprises a four-chamber structure, wherein the upper portion is a busbar chamber (100) and has a built-in wire row template (103), the middle portion is a circuit breaker chamber (101) and is connected to the busbar chamber (100) through a busbar joint end plate (14), and the lower portion comprises two chambers, a relay chamber (102) is located below the circuit breaker chamber (101), and a cable chamber (104) is located below the busbar chamber (100) and has an independent sealed door (13). A frame (11) is provided inside the cabinet (1) to support the relay chamber (102). Each chamber, the cabinet body (1) is equipped with three cabinet doors (12) at the front, the upper cabinet door (12) contains an observation window, the lower frame (11) of the busbar joint end plate (14) area is installed with guide rails (2) on both sides, the guide rails (2) are slidably provided with a guide seat (20) with a contact block, the outer side of the guide rail (2) is provided with a guide protrusion, the busbar joint end plate (14) is provided with a guide rod (21), the outer side of the guide protrusion is slidably connected with an inclined pull rod (22), and a pull rod (22) is provided between the guide protrusion. A spring (23) is provided, and the hinged structure at the bottom of the pull rod (22) is in sliding contact with the contact block of the guide seat (20). Gears (24) are rotatably installed on both sides of the middle of the front of the busbar joint end plate (14). Staggered racks (25) are slidably provided on both sides of the gear (24), and the racks (25) are meshed with the corresponding gears (24). Baffles (26) are slidably provided between the guide rods (21) on both sides to vertically cover the busbar joint. The two ends of the upper baffle (26) are connected to the upper rack (25). The two ends of the lower baffle (26) are connected to the lower rack (25), the upper end of the pull rod (22) is hinged to the upper end of the upper rack (25), the middle of the upper part of the cabinet (1) is connected to the heat dissipation cover (3), a plurality of humidity sensors (4) are symmetrically installed on the side of the frame (11), a smoke detector (40) is installed in the upper part of the circuit breaker chamber (101), a circulating collection component for collecting and processing moisture is laid in an annular shape on the outside of the cabinet (1), and an environmental sealing component for closing the heat dissipation path is provided on the outside of the heat dissipation cover (3).

2. The intelligent safety protection device for switch cabinet according to claim 1, characterized in that: The circulation collection assembly includes a delivery pipe (41), a dehumidifier (42), a collection pipe (421), a water level monitor (422), a sealing plug (423), a dryer (43) and a discharge pipe (45). The front periphery of the cabinet (1) is provided with a delivery pipe (41) in a circular rectangular shape. The upper part of the delivery pipe (41) is provided with a cylindrical sealing structure. The lower part of the delivery pipe (41) is connected to the relay room (102). The dehumidifier (42) is installed on both side walls of the relay room (102) and the cabinet (1). The dehumidifier (42) 2) is connected to the delivery pipe (41), collecting pipes (421) are provided on both sides of the lower part of the cabinet (1), the collecting pipes (421) are connected to the delivery pipe (41), a water level monitor (422) is installed on the upper part of the collecting pipe (421), a sealing plug (423) is clamped at the water outlet of the lower side of the collecting pipe (421), a dryer (43) is installed on the side of the dehumidifier (42), and a discharge pipe (45) is connected to the lower part of the cylindrical part of the delivery pipe (41), and the discharge pipe (45) extends into the upper part of the busbar chamber (100).

3. The intelligent safety protection device for switch cabinet according to claim 2, characterized in that: The circulation collection assembly further comprises a motor (44) and a fan blade (441). The upper portion of the cylindrical portion of the delivery pipe (41) is provided with a motor (44) with an output shaft facing downwards. The fan blade (441) is provided on the output shaft of the motor (44). The fan blade (441) is located inside the cylindrical portion.

4. The intelligent safety protection device for a switch cabinet according to claim 3, characterized in that: The environmental sealing component includes a shielding plate (5), a cylinder (51), a push frame (52), a limit guide frame (521) and a pulling rod (53). The upper part of the heat dissipation area on both sides of the heat dissipation cover (3) is hinged with a shielding plate (5). A cylinder (51) with a driving end facing downward is installed on one side of the upper part of the heat dissipation cover (3). A push frame (52) is installed on the driving end of the cylinder (51). The two ends of the push frame (52) extend downward, and an inclined limit guide frame (521) is provided on the extended part. The two ends of the hinge shaft on the upper part of the shielding plate (5) are fixed with a pull rod (53) extending outward. The lower part of the same side of the two pull rods (53) is respectively connected to the corresponding limit guide frame (521) in a rotating and sliding manner.

5. The intelligent safety protection device for switch cabinet according to claim 4, characterized in that: The cabinet (1) further comprises an emergency firefighting assembly. The emergency firefighting assembly is provided on the upper part and inside of the cabinet (1). The emergency firefighting assembly comprises a fire extinguishing tank (6), a piston plate (60), a second spring (601), a fire extinguishing agent conduit (61), a two-way pump pipe (62), a blocking valve (63), a linkage (64), a lifting rod (65), a spray pipe (66) and a diffusion nozzle (67). A fire extinguishing tank (6) for storing fire extinguishing agent is installed on one side of the upper part of the cabinet (1). A piston plate (60) is provided inside the fire extinguishing tank (6) for sliding. A second spring (601) is provided between the piston plate (60) and the fire extinguishing tank (6). One end of the fire extinguishing tank (6) is connected to a fire extinguishing agent conduit (61). The fire extinguishing agent conduit (61) is connected to the cabinet. The side of the cabinet (1) is extended, and two adjacent two-way pump pipes (62) are installed on the extended part. A shut-off valve (63) is rotatably provided inside the two-way pump pipe (62), and a flow hole is opened in the shut-off valve (63). The sealing end of the shut-off valve (63) protrudes outward, and a linkage member (64) is provided on the protruding part. A lifting rod (65) is rotatably provided on the upper part of the linkage member (64). The two lifting rods (65) are respectively rotatably and slidably connected to the lower parts of the two corresponding pulling rods (53) on the other side. A symmetrical spray pipe (66) is installed on one side of the middle part of the cabinet (1). The spray pipe (66) is connected to the two-way pump pipe (62), and a plurality of diffusion nozzles (67) are symmetrically connected along the axial direction on the spray pipe (66).

6. The intelligent safety protection device for a switch cabinet according to claim 5, characterized in that: The outlet end of the diffusion nozzle (67) is designed to be conical.

7. The intelligent safety protection device for a switch cabinet according to claim 6, characterized in that: The cabinet (1) further comprises a smoke recovery assembly, wherein the upper portion of the cabinet (1) is provided with a smoke recovery assembly below the discharge pipe (45), and the smoke recovery assembly comprises a recovery tank (7), a loop pipe (71), a second cylinder (72), a closing joint (73) and an output pump pipe (74). The upper portion of the cabinet (1) is provided with a recovery tank (7) below the discharge pipe (45), and the lower portion of the recovery tank (7) is connected to the loop pipe (71). The inlet of the loop pipe (71) is arranged opposite to the discharge port of the discharge pipe (45), and the inlet of the loop pipe (71) is arranged opposite to the discharge port of the discharge pipe (45). (45) The outside of the discharge port is provided with a closed joint (73), and when the two closed joints (73) are closed, a closed delivery pipe (41) is formed, wherein the closed joint (73) at the inlet of the loop pipe (71) is slidably connected thereto, and a second cylinder (72) with a driving end facing upward is installed on the side of the recovery tank (7), and the driving end of the second cylinder (72) is connected to the side of the closed joint (73) of the loop pipe (71), and the other side of the recovery tank (7) is connected to an output pump pipe (74), and the tubular portion of the output pump pipe (74) extends outside the cabinet (1).

8. The intelligent safety protection device for a switch cabinet according to claim 7, characterized in that: The utility model also includes a short-circuit protection component. The short-circuit protection component is provided on the upper part of the busbar joint end plate (14). The short-circuit protection component includes a lifting member (8), a rotating frame (81), an arc extinguishing cover (82) and a torsion spring (83). The lifting members (8) are provided at both ends of the upper baffle (26). The upper end of the lifting member (8) is provided with a contact inclined surface. The upper part of the busbar joint end plate (14) is hinged with a rotating frame (81). The lifting member (8) is in sliding contact with the rotating frame (81) to lift the rotating frame (81) to rotate it. The arc extinguishing cover (82) is installed inside the rotating frame (81). The hinge shafts at both ends of the lifting member and the baffle (26) are provided with torsion springs (83) on the outside.

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