Intelligent environmental protection gas insulated ring main unit

Abstract

The application discloses an intelligent environment-friendly gas insulated ring main unit, and relates to the technical field of electrical equipment.The intelligent environment-friendly gas insulated ring main unit comprises a cable chamber, a switch chamber is fixed to the upper end of the cable chamber, a low-voltage chamber is fixed to the upper end of the switch chamber, a protective door is installed on the side of the cable chamber, heat dissipation holes are formed in the protective door, a controller is fixed to the side of the low-voltage chamber, a dehumidification structure for dehumidifying the air in the cable chamber is arranged in the cable chamber, a humidity sensor for monitoring the humidity of the air in the cable chamber is fixed to the inside of the cable chamber, the humidity sensor is electrically connected with the controller, and a plugging structure for plugging the heat dissipation holes is arranged on the inner side of the protective door.Through the whole-process automatic mechanism of "real-time monitoring, intelligent judgment, automatic start and stop and precise humidity control", dynamic and precise regulation and control of the humidity in the cable chamber are realized, so that the hidden dangers of cable insulation aging and dew short circuit caused by excessively high humidity in the cable chamber can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical equipment, in particular to an intelligent environment-friendly gas insulated ring main unit. BACKGROUND

[0002] With the rapid development of social economy, the demand for electricity continues to rise, and the construction of electricity is moving towards intelligent, green and compact. The environment-friendly gas insulated ring main unit has become an important choice for modern power distribution equipment due to its excellent insulation performance, environmental protection, small footprint and other outstanding advantages.

[0003] The environment-friendly gas insulated ring main unit is a compact power distribution equipment that uses environment-friendly insulation gas as the insulation medium. Its internal core structure mainly includes three functional cavities: cable chamber, switch chamber and low-voltage chamber. The cable chamber is located at the bottom and is responsible for connecting the incoming and outgoing line cables, and needs to maintain a dry environment to prevent condensation. The switch chamber is in the middle and contains a vacuum circuit breaker or load switch, which realizes high-voltage isolation through environment-friendly gas. The low-voltage chamber is placed at the top and integrates the control unit and secondary equipment, which is completely isolated from the high-voltage part.

[0004] In the actual use of the existing environment-friendly gas insulated ring main unit, in order to ensure that the heat generated by the equipment inside the cable chamber during operation can be dissipated in time, and to avoid the influence of high temperature on the performance and service life of the equipment, a number of heat dissipation holes are usually opened on the protective door of the cable chamber to achieve natural heat dissipation through air circulation. However, this heat dissipation method is prone to infiltration of external humid air into the interior of the cable chamber through the heat dissipation holes in the case of relatively humid external environment (such as rainy southern regions, underground distribution rooms, etc.), resulting in an increase in the humidity of the air in the cavity. High humidity not only may reduce the insulation performance of the insulation gas, but also may cause corrosion of metal parts such as cable terminals and grounding switches, thereby affecting the operation safety and service life of the ring main unit and bringing potential risks to the stable operation of the power distribution network. SUMMARY

[0005] The present application aims to solve the problem of the existing ring main unit being easily affected by moisture in a humid environment, which affects the normal use of the ring main unit. The present application provides an intelligent environment-friendly gas insulated ring main unit.

[0006] In order to achieve the above-mentioned purpose, the present application specifically adopts the following technical solution:

[0007] The utility model relates to an intelligent environmental protection gas insulation ring network cabinet, including cable chamber, the upper end of cable chamber is fixed with switch chamber, the upper end of switch chamber is fixed with low pressure chamber, the side of cable chamber is installed with the guard door, is equipped with the heat dissipation hole in the guard door, the side of low pressure chamber is fixed with the controller, the inside of cable chamber is provided with the dehumidification structure for dehumidification to the air in cable chamber, the inside of cable chamber is fixed with humidity sensor for monitoring the air humidity in cable chamber, humidity sensor and controller electric connection, the inboard of guard door is provided with the plugging structure for the plugging of heat dissipation hole.

[0008] Through adopting the above technical scheme, when the cable chamber is put into use, the precise installation and fixation of the internal core equipment need to be completed first, and then the environmental protection insulation gas of specified pressure is filled in after confirming no leakage, and then the ring network cabinet is connected to the power grid for operation, and in the operation process, the dehumidification structure dehumidifies the air in the cable chamber, thereby being beneficial to the long-term use of the ring network cabinet.

[0009] Further, the dehumidification structure includes a dehumidification box fixed to the inner wall of the cable chamber, a cover plate fixed to the side of the dehumidification box, an air inlet pipe fixed to the lower end of the dehumidification box, a flow guide pipe fixed to the upper end of the dehumidification box, a corrugated hose fixed to the end of the flow guide pipe away from the dehumidification box, and an air outlet pipe fixed to the end of the corrugated hose away from the flow guide pipe. An air dehumidification assembly is arranged in the dehumidification box, and an adjusting assembly is arranged between the air outlet pipe and the cable chamber.

[0010] By adopting the above technical scheme, during the use of the ring network cabinet, the dehumidification structure can intelligently dehumidify the air in the cable chamber, thereby avoiding the problems of cable insulation aging and dew short circuit caused by excessive humidity, and being beneficial to the long-term use of the ring network cabinet.

[0011] Further, the dehumidification assembly includes a dehumidification box fixed to the inside of the dehumidification box, a through hole for air circulation is formed in the bottom of the dehumidification box, a side plate is fixed to the side of the dehumidification box, a drive motor is fixed to the side of the dehumidification box, the drive motor is electrically connected with the controller, the output end of the drive motor extends into the dehumidification box and is rotatably connected with the dehumidification box, a drive shaft is fixed to the output end of the drive motor, the end of the drive shaft away from the drive motor extends out of the dehumidification box and is rotatably connected with the dehumidification box, an impeller is fixed to the drive shaft, and the impeller is located below the dehumidification box.

[0012] By adopting the above technical scheme, the dehumidification assembly is used to suck the humid air in the cable chamber into the collection box and dehumidify the humid air, thereby being beneficial to the use of the ring network cabinet.

[0013] Further, the first stirring shaft and the second stirring shaft are rotatably connected inside the dehumidification box, and the first stirring shaft and the second stirring shaft both penetrate the dehumidification box and the dehumidification tank, and stirring blades are fixed on the first stirring shaft and the second stirring shaft.

[0014] By adopting the above technical scheme, the active aluminum oxide inside the dehumidification box can be stirred by the first stirring shaft and the second stirring shaft driving the stirring blades to rotate, so that the problem that the surface layer of active aluminum oxide particles is quickly saturated by absorbing moisture due to first contacting the humid air, and the air can only contact the saturated particles on the surface layer, resulting in a sharp decrease in the moisture absorption capacity in a short time, can be effectively avoided.

[0015] Further, the first driving shaft is fixed with a first belt pulley at one end extending out of the dehumidification tank, the first stirring shaft is fixed with a second belt pulley at one end extending out of the dehumidification tank, and the first belt pulley and the second belt pulley are drivingly connected by a first transmission belt.

[0016] By adopting the above technical scheme, the first belt pulley is driven to rotate when the driving shaft rotates, and the second belt pulley is driven to rotate under the action of the first transmission belt, so that the first stirring shaft is driven to rotate, thereby playing a transmission role.

[0017] Further, the first stirring shaft is fixed with a driving gear at one end extending out of the dehumidification tank, the second stirring shaft is fixed with a driven gear meshing with the driving gear at one end extending out of the dehumidification tank, and the number of teeth of the driving gear is greater than the number of teeth of the driven gear.

[0018] By adopting the above technical scheme, the driving gear is driven to rotate when the first stirring shaft rotates, and the driven gear is driven to rotate by the rotation of the driving gear, so that the second stirring shaft is driven to rotate, thereby playing a transmission role.

[0019] Further, the adjusting assembly comprises a bidirectional screw rod rotatably connected inside the cable chamber, a connecting rod is fixed on the air outlet pipe, a nut seat matched with the bidirectional screw rod is fixed inside the connecting rod, the nut seat is sleeved on the bidirectional screw rod, a guide rod is fixed inside the cable chamber, and the nut seat is slidingly sleeved on the guide rod.

[0020] By adopting the above technical scheme, the adjusting assembly is used to drive the air outlet pipe to reciprocate inside the cable chamber, so as to accelerate the flow of humid air to the air inlet of the dehumidification tank, and make the humid air more efficiently contact the active aluminum oxide particles in the dehumidification tank, thereby improving the dehumidification effect.

[0021] Further, the second stirring shaft is fixed with a third belt pulley at one end extending out of the dehumidification tank, and the bidirectional screw rod is fixed with a third belt pulley at one end close to the dehumidification tank, and the two third belt pulleys are drivingly connected by a second transmission belt.

[0022] Through the above technical scheme, when the second stirring shaft rotates, the bidirectional screw rod rotates under the action of the third belt pulley and the second transmission belt, thereby achieving the transmission effect.

[0023] Further, the cable chamber is internally fixed with a mounting shaft, and a tension pulley is fixed on the mounting shaft and is in contact with the second transmission belt.

[0024] Through the above technical scheme, the tension pulley plays a role in tensioning the second transmission belt, which can effectively reduce the problem of falling in the transmission process caused by the too large span of the second transmission belt.

[0025] Further, the sealing structure comprises a sealing plate slidingly arranged on the inner side of the protective door, an electric telescopic rod is fixed on the inner side of the protective door, the electric telescopic rod is electrically connected with the controller, the telescopic end of the electric telescopic rod is fixedly connected with the sealing plate, a supporting block is fixed on the inner side of the protective door, a supporting column is fixed on the end of the sealing plate away from the electric telescopic rod, and the supporting column slidingly penetrates through the supporting block.

[0026] Through the above technical scheme, in the dehumidification process, the sealing structure can seal the heat dissipation hole, thereby reducing the penetration of external humid air into the cable chamber through the heat dissipation hole, and improving the dehumidification efficiency.

[0027] In summary, the present application has at least one of the following beneficial effects:

[0028] 1、The application, in the use process of the ring netowrk cabinet, when the humidity sensor real-time monitors that the air humidity in the cable chamber is higher than the threshold of 65%, immediately transmits the humidity exceeding standard signal to the main controller, the controller rapidly issues the start instruction to the driving motor after data processing, the driving motor starts immediately and drives the driving shaft to rotate, so that the impeller rotates and the air flow rate in the dehumidification box is accelerated, at this time the damp air in the cable chamber is actively sucked into the dehumidification box through the air inlet pipe, and enters the inside of the dehumidification box through the through hole opened at the bottom of the dehumidification box, and fully contacts with the active alumina particles filled in the dehumidification box, and the active alumina particles have strong moisture absorption performance and can efficiently absorb the moisture in the air, the air after drying treatment flows out from the air outlet pipe, the whole dehumidification process continues to run until the humidity sensor monitors that the humidity in the cable chamber decreases to the lower threshold of 40%, the sensor sends the signal to the controller again, the controller immediately issues the stop instruction, the driving motor stops working, and the system enters the standby monitoring state. The whole dehumidification process of the dehumidification structure does not need manual intervention, through the whole process automatic mechanism of "real-time monitoring, intelligent judgment, automatic start and stop, accurate humidity control", the dynamic and accurate regulation and control of the humidity in the cable chamber is realized, not only the humidity is ensured to be always stable in the safety interval of 40% to 65%, but also the intelligent response avoids the cable insulation aging, dew short circuit and other hidden troubles caused by high humidity, and provides reliable protection for the long-term safe and stable operation of the ring netowrk cabinet from the environmental control level.

[0029] 2、In the process of driving the impeller to rotate, the first stirring shaft is driven to rotate under the action of the first belt pulley, the first transmission belt and the second belt pulley, and under the action of the driving gear and the driven gear, the active alumina particles in the dehumidification box are stirred and rotated by the first stirring shaft and the second stirring shaft, so that the active alumina particles in the dehumidification box are stirred and rotated by the first stirring shaft and the second stirring shaft. By stirring the active alumina particles, the unsaturated particles in the dehumidification box can be turned to the surface layer, so that the humid air can continuously contact the "effective moisture absorption area", so that the overall moisture absorption rate of the active alumina particles can be kept stable, and the problem that the surface layer of the active alumina particles is quickly saturated by contacting the humid air first, so that the air can only contact the saturated particles on the surface layer, resulting in a large decrease in the moisture absorption capacity in a short time.

[0030] 3、In the process of continuous moisture absorption of the active alumina particles, the surface layer may appear sticky due to slight deliquescence, and may be easily adhered to each other to form clumps when placed statically. The inside of the clumped particles is sealed, and after the moisture-saturated active alumina particles are taken out for regeneration, the clumping phenomenon will cause a large decrease in the moisture absorption capacity. By driving the stirring blades to stir the active alumina particles through the first stirring shaft and the second stirring shaft, the adhered particles can be dispersed in real time by mechanical force, the clumping is avoided, the dehumidifier is kept in a dispersed particle state, the original moisture absorption capacity can be restored after regeneration, the attenuation of the moisture absorption effect after regeneration is greatly reduced, and the subsequent reuse is more favorable.

[0031] 4、In the process of rotating the second stirring shaft, the bidirectional screw rod is rotated under the action of the third pulley and the second transmission belt. When the bidirectional screw rod rotates, the connecting rod drives the air outlet pipe to move reciprocatingly in the cable chamber under the action of the connecting rod, the nut seat, and the guide rod, so that the air outlet range of the air outlet pipe in the cable chamber can be improved. The reciprocating air outlet pipe can drive the air in the cable chamber to form a vortex circulation by generating a dynamic airflow. This active airflow disturbance mechanism can accelerate the flow of humid air to the air inlet of the dehumidification box. Compared with the fixed air outlet mode, the dynamic vortex can break the static distribution state of the air, effectively avoid the local deposition of humid air in the corners of the cable chamber, the gaps between equipment, and other areas, and make the humid air more efficiently enter the dehumidification box and contact the active alumina particles, thereby significantly improving the overall dehumidification efficiency.

[0032] 5、The reciprocating movement design of the air outlet pipe can realize uniform air supply to different parts of the cable chamber, and the dry air after dehumidification is delivered to each area. This feature can effectively avoid the air outlet dead angle problem caused by the shielding of equipment in the cable chamber, prevent the uneven phenomenon of local air being too dry or too humid, and ensure more uniform dehumidification. The uniform distribution of the indoor humidity field also provides a more representative monitoring environment for the humidity sensor, further improves the monitoring accuracy of the sensor, and lays a foundation for the accurate control of the intelligent dehumidification system.

[0033] 6、When the humidity sensor real-time monitors that the air humidity in the cable chamber is higher than the threshold of 65%, the controller sends a control instruction to the electric telescopic rod at the same time of transmitting the signal to the controller and triggering the driving motor to start, so that the telescopic end of the electric telescopic rod is elongated to drive the blocking plate to move downward and tightly block the heat dissipation hole. This linkage design can reduce the infiltration of external humid air into the cable chamber through the heat dissipation hole when the dehumidification system is running, avoid the humid air from entering while being dehumidified, thereby significantly accelerate the humidity reduction speed in the cable chamber and improve the dehumidification efficiency. When the humidity sensor monitors that the humidity in the cable chamber decreases to the lower threshold of 40%, the controller sends a signal to the electric telescopic rod at the same time of sending a driving motor shutdown instruction, so that the telescopic end of the electric telescopic rod is retracted and drives the blocking plate to move upward, thereby restoring the ventilation function of the heat dissipation hole. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a schematic diagram of the ring main unit in the application;

[0035] Figure 2 is a schematic diagram of the dehumidification structure and the cable chamber in the application;

[0036] Figure 3 is a first internal structure schematic diagram of the dehumidification structure in the application;

[0037] Figure 4is the second internal structure schematic diagram of the dehumidification structure in the application;

[0038] Figure 5 is the internal structure schematic diagram of the dehumidification box in the application;

[0039] Figure 6 is the transmission schematic diagram of the driving shaft and the first stirring shaft in the application;

[0040] Figure 7 is the schematic diagram of the plugging structure in the application.

[0041] Legend:

[0042] 1, cable chamber; 11, switch chamber; 12, low-voltage chamber; 13, protective door; 14, heat dissipation hole; 15, controller; 2, dehumidification box; 21, cover plate; 22, air inlet pipe; 23, flow guide pipe; 24, corrugated hose; 25, air outlet pipe; 26, dehumidification box; 261, side plate; 262, driving motor; 263, driving shaft; 264, impeller; 27, first stirring shaft; 271, second stirring shaft; 272, stirring blade; 273, first pulley; 274, second pulley; 275, first transmission belt; 276, driving gear; 277, driven gear; 28, bidirectional screw rod; 281, connecting rod; 282, guide rod; 283, third pulley; 284, second transmission belt; 285, mounting shaft; 286, tension pulley; 3, humidity sensor; 4, plugging plate; 41, electric telescopic rod; 42, support block; 43, support column. DETAILED DESCRIPTION

[0043] The following will be described in detail in combination with the accompanying Figures 1-7 The application is further described in detail.

[0044] The embodiment of the application discloses an intelligent environment-friendly gas insulated ring network cabinet.

[0045] Reference Figure 1 and Figure 2 An intelligent environment-friendly gas insulated ring network cabinet, comprising a cable chamber 1, the upper end of the cable chamber 1 is fixedly connected with a switch chamber 11, the upper end of the switch chamber 11 is fixedly connected with a low-voltage chamber 12, the side of the cable chamber 1 is provided with a protective door 13, the protective door 13 is provided with a heat dissipation hole 14, the side of the low-voltage chamber 12 is fixedly connected with a controller 15, the inside of the cable chamber 1 is provided with a dehumidification structure for dehumidifying the air in the cable chamber 1, the inside of the cable chamber 1 is fixedly connected with a humidity sensor 3 for monitoring the humidity of the air in the cable chamber 1, the humidity sensor 3 is electrically connected with the controller 15, and the inside of the protective door 13 is provided with a plugging structure for plugging the heat dissipation hole 14.

[0046] When the cable chamber 1 is put into use, the precise installation and fixation of the core equipment such as internal circuit breaker, lightning arrester and cable head need to be completed first, so as to ensure that the wiring terminals of each component are fastened according to the specified torque, and then the sealing performance of the interior of the cabinet body is detected, and after confirming that there is no leakage, the environmentally friendly insulating gas with specified pressure is filled, and the gas density relay is used to verify that the gas pressure meets the standard. After the above preparation work is completed, the ring main unit can be connected to the power grid and put into operation. In the daily operation process, the humidity sensor 3 can monitor the air humidity in the cable chamber 1 in real time, and when the humidity is too high, the dehumidification structure is used to dehumidify the air in the cable chamber 1, thereby being beneficial to the long-term use of the ring main unit. And the plugging structure can plug the heat dissipation hole 14, thereby reducing the entry of external humid air into the interior of the cable chamber 1 during the dehumidification process.

[0047] Referring to Figures 3-6 , the dehumidification structure comprises a dehumidification box 2 fixed to the inner wall of the cable chamber 1, a cover plate 21 fixed to the side of the dehumidification box 2, an air inlet pipe 22 fixed to the lower end of the dehumidification box 2, and a flow guide pipe 23 fixed to the upper end of the dehumidification box 2. A detachable filter screen is arranged at the connection position of the flow guide pipe 23 and the dehumidification box 2, which can effectively prevent fine particles of the dehumidifier from entering the interior of the flow guide pipe 23. A corrugated hose 24 is fixed to the end of the flow guide pipe 23 away from the dehumidification box 2, and an air outlet pipe 25 is fixed to the end of the corrugated hose 24 away from the flow guide pipe 23. A dehumidification assembly is arranged in the dehumidification box 2, and an adjusting assembly is arranged between the air outlet pipe 25 and the cable chamber 1.

[0048] The dehumidification assembly comprises a dehumidification box 26 fixed to the interior of the dehumidification box 2, and a through hole for air circulation is formed in the bottom of the dehumidification box 26. The dehumidification box 26 is used for placing a dehumidifier, and the dehumidifier is an active alumina particle. A side plate 261 is fixed to the side of the dehumidification box 26. The side plate 261 and the dehumidification box 26 are connected through screws, so that when it is necessary to replace the dehumidifier, the screws are detached, the cover plate 21 is removed, and the dehumidifier is replaced. A drive motor 262 is fixed to the side of the dehumidification box 2, the drive motor 262 is electrically connected with the controller 15, the output end of the drive motor 262 extends into the interior of the dehumidification box 2 and is rotationally connected with the dehumidification box 2, a drive shaft 263 is fixed to the output end of the drive motor 262, the end of the drive shaft 263 away from the drive motor 262 extends out of the dehumidification box 2 and is rotationally connected with the dehumidification box 2, an impeller 264 is fixed to the drive shaft 263, and the impeller 264 is located below the dehumidification box 26.

[0049] In the use process of the ring net cabinet, when the humidity sensor 3 monitors that the air humidity in the cable chamber 1 is higher than the threshold of 65% in real time, the humidity exceeding signal is transmitted to the main controller 15 immediately, the controller 15 sends the starting instruction to the driving motor 262 after data processing, the driving motor 262 is started immediately and drives the driving shaft 263 to rotate, the driving shaft 263 drives the impeller 264 to rotate and accelerates the air flow speed in the inside of the dehumidification box 2, at this time, the damp air in the cable chamber 1 is actively sucked into the dehumidification box 2 through the air inlet pipe 22 and enters the inside of the dehumidification box 26 through the through hole at the bottom of the dehumidification box 26, and fully contacts with the active alumina particles filled in the dehumidification box 26, the active alumina particles have strong moisture absorption performance and can efficiently absorb the moisture in the air, the air dried by the active alumina particles flows along the flow guide pipe 23, then passes through the corrugated hose 24 and finally flows out from the air outlet pipe 25, the whole dehumidification work continuously runs until the humidity sensor 3 monitors that the humidity in the cable chamber 1 is reduced to the lower threshold of 40%, then the sensor sends the signal to the controller 15 again, the controller 15 sends the stop instruction immediately, the driving motor 262 stops working, and the system enters the standby monitoring state. The whole dehumidification process of the dehumidification structure does not need manual intervention, through the whole process automatic mechanism of "real-time monitoring, intelligent judgment, automatic start and stop and accurate humidity control", the dynamic and accurate regulation and control of the humidity in the cable chamber 1 are realized, not only the humidity is ensured to be always stable in the safety interval of 40% to 65%, but also the intelligent response avoids the hidden troubles of cable insulation aging and dew short circuit caused by high humidity, and provides reliable guarantee for the long-term safe and stable operation of the ring net cabinet from the environmental control level.

[0050] With reference to Figure 5 and Figure 6 , the first stirring shaft 27 and the second stirring shaft 271 are rotationally connected in the inside of the dehumidification box 26, the first stirring shaft 27 and the second stirring shaft 271 both penetrate the dehumidification box 26 and the dehumidification box 2, and the stirring blades 272 are fixed on the first stirring shaft 27 and the second stirring shaft 271.

[0051] The one end of the driving shaft 263 fixedly connected with the first belt pulley 273, the one end of the first stirring shaft 27 fixedly connected with the second belt pulley 274, and the first belt pulley 273 and the second belt pulley 274 are transmissionally connected through the first transmission belt 275.

[0052] In addition, the one end of the first stirring shaft 27 fixedly connected with the driving gear 276, the one end of the second stirring shaft 271 fixedly connected with the driven gear 277 meshing with the driving gear 276, and the number of the teeth of the driving gear 276 is greater than the number of the teeth of the driven gear 277, so the rotating speed of the first stirring shaft 27 is less than the rotating speed of the second stirring shaft 271, and the differential stirring can make the active alumina particles more evenly stirred.

[0053] In the process of driving shaft 263 driving impeller 264 to rotate, first pulley 273 at the end of driving shaft 263 rotates, and then drives second pulley 274 to rotate through first transmission belt 275, so as to drive first stirring shaft 27 to rotate. When first stirring shaft 27 rotates, driving gear 276 rotates, which drives driven gear 277 to drive second stirring shaft 271 to rotate. Through the rotation of first stirring shaft 27 and second stirring shaft 271, stirring blades 272 are driven to rotate, so that the active alumina particles in the inside of dehumidification box 26 can be stirred. By stirring the active alumina particles, the unsaturated particles in the inside of dehumidification box 26 can be stirred to the surface layer, so that the humid air can continuously contact the "effective moisture absorption area", so that the overall moisture absorption rate of the active alumina particles can be kept stable. The problem that the surface layer of the active alumina particles is quickly saturated by contacting the humid air first, and the air can only contact the saturated particles in the surface layer, resulting in a large decrease in the moisture absorption capacity in a short time, can be effectively avoided.

[0054] In the process of continuous moisture absorption of the active alumina particles, the surface layer may be slightly deliquescent and sticky, and when placed statically, the particles may be easily adhered to each other and form clumps. The inside of the clumped particles is sealed. After the moisture-saturated active alumina particles are taken out for regeneration, the clumping phenomenon can cause a large decrease in the moisture absorption capacity. The stirring can disperse the adhered particles in real time by mechanical force, avoid the formation of clumps, keep the dehumidifier in a dispersed particle state, ensure that the moisture absorption capacity after regeneration can be restored, greatly reduce the attenuation of the moisture absorption effect after regeneration, and be more conducive to subsequent reuse.

[0055] Referring to Figure 3 and Figure 4 , the adjusting assembly includes a bidirectional screw rod 28 rotatably connected in the cable chamber 1. The air outlet pipe 25 is fixed with a connecting rod 281, and the connecting rod 281 is fixed with a nut seat matched with the bidirectional screw rod 28. The nut seat is sleeved on the bidirectional screw rod 28. The cable chamber 1 is fixed with a guide rod 282, and the nut seat is sleeved on the guide rod 282.

[0056] The second stirring shaft 271 and the bidirectional screw rod 28 near the dehumidification box 2 are both fixed with a third pulley 283, and the two third pulleys 283 are connected by a second transmission belt 284.

[0057] In addition, the cable chamber 1 is fixed with a mounting shaft 285, and the mounting shaft 285 is fixed with a tension pulley 286, which is in contact with the second transmission belt 284.

[0058] When the second stirring shaft 271 rotates, the third pulley 283 at the end of the second stirring shaft 271 will follow the rotation, and then under the action of the second transmission belt 284, the pulley at the end of the bidirectional lead screw 28 will follow the rotation, thereby causing the bidirectional lead screw 28 to rotate. When the bidirectional lead screw 28 rotates, the connecting rod 281 is stressed, and the nut seat inside the connecting rod 281 is stressed and limited by the guide rod 282, so that the connecting rod 281 drives the air outlet pipe 25 to reciprocate inside the cable chamber 1, thereby improving the air outlet range of the air outlet pipe 25 inside the cable chamber 1. The reciprocating air outlet pipe 25 can drive the air in the cable chamber 1 to form a vortex circulation by generating a dynamic air flow, and this active air flow disturbance mechanism can accelerate the flow of humid air to the air inlet of the dehumidification box 2. Compared with the fixed air outlet mode, the dynamic vortex can break the static distribution state of the air, effectively avoid the local deposition of humid air in the corners of the cable chamber 1, the gaps between equipment, and other areas, and make the humid air more efficiently enter the dehumidification box 2 and contact with the active alumina particles, thereby significantly improving the overall moisture absorption efficiency.

[0059] The reciprocating movement design of the air outlet pipe 25 can realize uniform air supply to different parts inside the cable chamber 1 and deliver dry air after dehumidification to each area. This feature can effectively avoid the air outlet dead angle problem caused by the shielding of equipment inside the cable chamber 1, prevent the uneven phenomenon of local air being too dry or too humid, and ensure more uniform dehumidification. The uniform distribution of the indoor humidity field also provides a more representative monitoring environment for the humidity sensor 3, further improves the monitoring accuracy of the sensor, and lays a foundation for accurate control of the intelligent dehumidification system.

[0060] With reference to Figure 7 The blocking structure includes a blocking plate 4 slidingly arranged inside the protective door 13. An electric telescopic rod 41 is fixed to the inside of the protective door 13 and is electrically connected to the controller 15. The telescopic end of the electric telescopic rod 41 is fixedly connected to the blocking plate 4. A support block 42 is fixed to the inside of the protective door 13. A support column 43 is fixed to one end of the blocking plate 4 away from the electric telescopic rod 41 and slidingly penetrates the support block 42.

[0061] When the humidity sensor 3 monitors that the air humidity inside the cable chamber 1 is higher than the threshold of 65% in real time, the controller 15 sends a control instruction to the electric telescopic rod 41 to make its telescopic end extend to drive the sealing plate 4 to move downward to tightly seal the heat dissipation hole 14 through the sealing plate 4. This linkage design can reduce the penetration of external humid air into the cable chamber 1 through the heat dissipation hole 14 when the dehumidification system is running, avoid the humid air from entering while being dehumidified, and thus significantly accelerate the humidity reduction speed inside the cable chamber 1 and improve the dehumidification efficiency. When the humidity sensor 3 monitors that the humidity inside the cable chamber 1 drops to the lower threshold of 40%, the controller 15 sends a signal to the electric telescopic rod 41 to make its telescopic end retract and drive the sealing plate 4 to move upward to restore the ventilation function of the heat dissipation hole 14. Moreover, the electric telescopic rod 41 supports an independent control mode, and when the external environment air humidity is high, the heat dissipation hole 14 can be manually controlled to be closed by the sealing plate 4 to actively isolate the external humid air, and further create a stable and dry internal environment for the cable chamber 1.

[0062] Working principle: When the cable chamber 1 is put into use, the precise installation and fixation of core devices such as internal breakers, arresters, and cable heads need to be completed to ensure that the wiring terminals of each component are fastened according to the specified torque. Then, the sealing performance of the cabinet interior is detected, and after confirming that there is no leakage, the specified pressure of environmentally friendly insulating gas is filled, and the gas density relay is used to verify that the gas pressure meets the standard. After completing the above preparation work, the ring main unit can be connected to the power grid for operation.

[0063] During the use of the ring main unit, when the humidity sensor 3 monitors that the air humidity inside the cable chamber 1 is higher than the threshold of 65% in real time, the humidity exceeding signal is immediately transmitted to the main controller 15. After data processing, the controller 15 quickly sends a start instruction to the drive motor 262 and the electric telescopic rod 41. The drive motor 262 is started and drives the drive shaft 263 to rotate, which drives the impeller 264 to rotate and accelerates the air flow speed inside the dehumidification box 2. At this time, the humid air inside the cable chamber 1 is actively sucked into the dehumidification box 2 through the air inlet pipe 22 and enters the dehumidification box 26 through the through hole at the bottom of the dehumidification box 26, fully contacts with the active alumina particles filled in the dehumidification box 26, and uses the strong moisture absorption performance of the active alumina particles to efficiently absorb the moisture in the air. The air dried by the active alumina particles flows along the flow guide pipe 23, then through the corrugated hose 24, and finally flows out from the air outlet pipe 25.

[0064] After receiving the signal, the controller 15 makes its telescopic end extend to drive the sealing plate 4 to move downward to tightly seal the heat dissipation hole 14, which can reduce the penetration of external humid air into the cable chamber 1 during the dehumidification process and further improve the dehumidification efficiency.

[0065] In the process of driving shaft 263 driving impeller 264 rotating, the first pulley 273 at the end of the rotating, and then in the first drive belt 275 under the action of the second pulley 274 rotating, so that the first stirring shaft 27 rotating, the first stirring shaft 27 rotating, driving gear 276 rotating, driving gear 276 rotating makes the driven gear 277 driven second stirring shaft 271 rotating, through the first stirring and second stirring shaft 271 rotating and driving stirring blade 272 rotating, so as to be able to move the active alumina particles in the inside of the dehumidification box 26. By moving the active alumina particles can be dehumidification box 26 inside the unsaturated particles to the surface layer, let the humid air continues to contact with "effective moisture absorption area", the active alumina particles overall moisture absorption rate remains stable, can effectively avoid the surface layer of active alumina particles first contact with the humid air and quickly saturated, air can only with the surface layer of saturated particles contact, resulting in the problem of moisture absorption capacity will be in a short time in a large decline.

[0066] The whole dehumidification work continues to run, until the humidity sensor 3 monitors the cable room 1 humidity to 40% lower threshold, the sensor sends a signal to the controller 15 again, the controller 15 immediately sends stop command, driving motor 262 stop working, the system enters standby monitoring state. And the controller 15 will send control signal to the electric telescopic rod 41, make its telescopic end contraction and drive the blocking plate 4 to move up, restore the ventilation function of the heat dissipation hole 14. The whole dehumidification process of the dehumidification structure does not need artificial intervention, through the whole process automation mechanism of "real-time monitoring, intelligent judgment, automatic start and stop, accurate humidity control", realize the dynamic accurate regulation and control of the cable room 1 humidity, not only ensure the humidity always stable in the safety interval of 40% ~ 65%, but also avoid the cable insulation aging, dew short circuit and other hidden troubles caused by high humidity with intelligent response, from the environmental control level to provide reliable guarantee for the long-term safe and stable operation of the ring network cabinet.

Claims

1. An intelligent and environmentally friendly gas-insulated ring main unit, comprising a cable compartment (1), characterized in that: A switch chamber (11) is fixed to the upper end of the cable chamber (1), and a low-pressure chamber (12) is fixed to the upper end of the switch chamber (11). A protective door (13) is installed on the side of the cable chamber (1), and a heat dissipation hole (14) is provided on the protective door (13). A controller (15) is fixed to the side of the low-pressure chamber (12). A dehumidification structure for dehumidifying the air inside the cable chamber (1) is provided inside the cable chamber (1), and a humidity sensor for monitoring the humidity of the air inside the cable chamber (1) is fixed inside the cable chamber (1). (3) The humidity sensor (3) is electrically connected to the controller (15). The inner side of the protective door (13) is provided with a sealing structure for sealing the heat dissipation hole (14). The dehumidification structure includes a dehumidification box (2) fixed to the inner wall of the cable chamber (1). A cover plate (21) is fixed to the side of the dehumidification box (2). An air inlet pipe (22) is fixed to the lower end of the dehumidification box (2). A guide pipe (23) is fixed to the upper end of the dehumidification box (2). A corrugated hose is fixed to the end of the guide pipe (23) away from the dehumidification box (2). 24), the corrugated hose (24) is fixed with an air outlet pipe (25) at the end away from the guide pipe (23), the dehumidification box (2) is provided with a dehumidification component, the air outlet pipe (25) is provided with an adjustment component between the cable chamber (1), the dehumidification component includes a dehumidification box (26) fixed inside the dehumidification box (2), the bottom of the dehumidification box (26) is provided with a through hole for air circulation, the side plate (261) is fixed on the side of the dehumidification box (26), and the drive motor (262) is fixed on the side of the dehumidification box (2). The drive motor (262) is electrically connected to the controller (15). The output end of the drive motor (262) extends into the dehumidification box (2) and is rotatably connected to the dehumidification box (2). The output end of the drive motor (262) is fixed with a drive shaft (263). The end of the drive shaft (263) away from the drive motor (262) extends out of the dehumidification box (2) and is rotatably connected to the dehumidification box (2). An impeller (264) is fixed on the drive shaft (263). The impeller (264) is located below the dehumidification box (26).

2. The intelligent and environmentally friendly gas-insulated ring main unit according to claim 1, characterized in that: The dehumidification box (26) is rotatably connected to a first stirring shaft (27) and a second stirring shaft (271). The first stirring shaft (27) and the second stirring shaft (271) both pass through the dehumidification box (26) and the dehumidification chamber (2). Stirring blades (272) are fixed on the first stirring shaft (27) and the second stirring shaft (271).

3. The intelligent and environmentally friendly gas-insulated ring main unit according to claim 2, characterized in that: The drive shaft (263) is fixed with a first pulley (273) at one end extending out of the dehumidification box (2), and the first agitator shaft (27) is fixed with a second pulley (274) at one end extending out of the dehumidification box (2). The first pulley (273) and the second pulley (274) are connected by a first transmission belt (275).

4. The intelligent and environmentally friendly gas-insulated ring main unit according to claim 3, characterized in that: The first agitator shaft (27) has a drive gear (276) fixed at one end extending out of the dehumidifier box (2), and the second agitator shaft (271) has a driven gear (277) fixed at one end extending out of the dehumidifier box (2) that meshes with the drive gear (276). The number of teeth of the drive gear (276) is greater than the number of teeth of the driven gear (277).

5. The intelligent and environmentally friendly gas-insulated ring main unit according to claim 2, characterized in that: The adjustment assembly includes a bidirectional lead screw (28) rotatably connected inside the cable chamber (1), a connecting rod (281) fixed on the air outlet pipe (25), a nut seat adapted to the bidirectional lead screw (28) fixed inside the connecting rod (281), the nut seat being sleeved on the bidirectional lead screw (28), a guide rod (282) fixed inside the cable chamber (1), and the nut seat being slidably sleeved on the guide rod (282).

6. The intelligent and environmentally friendly gas-insulated ring main unit according to claim 5, characterized in that: The second stirring shaft (271) is fixed with a third pulley (283) at one end extending out of the dehumidification box (2) and the double-acting screw (28) is fixed with a third pulley (283) at one end near the dehumidification box (2). The two third pulleys (283) are connected by a second transmission belt (284).

7. The intelligent and environmentally friendly gas-insulated ring main unit according to claim 6, characterized in that: The cable chamber (1) is fixed with an installation shaft (285), and a tension wheel (286) is fixed on the installation shaft (285). The tension wheel (286) is in contact with the second transmission belt (284).

8. The intelligent and environmentally friendly gas-insulated ring main unit according to claim 1, characterized in that: The sealing structure includes a sealing plate (4) slidably disposed inside the protective door (13), an electric telescopic rod (41) fixed inside the protective door (13), the electric telescopic rod (41) being electrically connected to a controller (15), the telescopic end of the electric telescopic rod (41) being fixedly connected to the sealing plate (4), a support block (42) being fixed inside the protective door (13), and a support column (43) being fixed at one end of the sealing plate (4) away from the electric telescopic rod (41), the support column (43) slidingly penetrating the support block (42).

Images