High-voltage switch cabinet for smart power grid

Abstract

The invention discloses a high-voltage switch cabinet for a smart power grid, and particularly relates to the technical field of switch cabinets, the high-voltage switch cabinet comprises a cabinet body and a dehumidification device, one side, close to the dehumidification device, of the cabinet body is provided with a water pan, the cabinet body is internally provided with a dry-wet exchange assembly, and the dry-wet exchange assembly is used for cooperating with the dehumidification device to strengthen dehumidification and ventilation in the cabinet body; the dry-wet exchange assembly comprises a shunt box fixedly connected to the interior of the cabinet body; water in the water receiving disc is guided into the flow dividing box through the water receiving disc, liquid water is prevented from being dispersed and accumulated in the cabinet body, then condensate water in the flow dividing box is sucked out through the tail ends of the four water absorbing cotton swabs, the liquid water is locked on the periphery of the water absorbing cotton swabs through the capillary adsorption effect of the water absorbing cotton swabs, and a conversion path of solid adsorption and gaseous evaporation is formed; and forced convection is performed on the axial flow fan to strengthen heat exchange, so that the stability and the high efficiency of the moisture removal and ventilation process in the cabinet body are improved, and stable operation of elements in the cabinet body is ensured.

Description

Technical Field

[0001] This invention relates to the field of switchgear technology, and more specifically to a high-voltage switchgear for smart grids. Background Technology

[0002] A smart grid is a fully closed-loop intelligent energy network that integrates traditional power systems with modern information technology, communication technology, automation control technology, energy storage technology, and power electronics technology. It is built upon this physical foundation and deeply integrates modern information technology, communication technology, automation control technology, energy storage technology, and power electronics technology. Through the deployment of smart sensors, smart meters, fault recording devices, online monitoring equipment, and other terminals, it monitors the operational status (voltage, current, power, temperature, humidity, etc.) of each link in the power grid (generation side, transmission side, distribution side, and consumption side). Therefore, switchgear is indispensable. Switchgear integrates these components to maintain the power supply to the grid. In the context of switchgear, dehumidifiers are used to provide real-time feedback on the cabinet's operational status. During dehumidification within the switchgear, the internal temperature decreases while the external temperature remains high, creating a significant temperature difference between the inside and outside of the cabinet. At the dew point temperature, water vapor in the air condenses into liquid water. Furthermore, the surface temperature of the evaporator inside the dehumidifier is often lower than this dew point temperature, making it easy for water vapor to condense on the evaporator surface. Especially in hot and humid summer environments, the temperature difference between the inside and outside of the cabinet further increases, significantly raising the probability of water vapor condensation. This results in a large amount of condensate adhering to the surface of the internal unit and surrounding components. While existing technologies use dehumidifiers to cool and dehumidify the cabinet, the large amount of condensate easily adheres to the surfaces of various components inside the dehumidifier. During the cooling and dehumidification process, the airflow generated blows this condensate into the air, causing the humidity inside the air conditioner to rise. This increased humidity diffuses into the cabinet, leading to excessive overall humidity levels, failing to meet the specific temperature and humidity requirements of the switchgear equipment and affecting the power supply stability of the switchgear. Summary of the Invention

[0003] The purpose of this invention is to provide a high-voltage switchgear for smart grids to address the aforementioned shortcomings in the technology.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a high-voltage switchgear for smart grids, comprising a cabinet and a dehumidification device, wherein a water receiving tray is provided on the side of the cabinet near the dehumidification device, and a dry-wet exchange component is provided inside the cabinet, and the dry-wet exchange component is used to work in conjunction with the dehumidification device to enhance dehumidification and ventilation inside the cabinet. The dry and wet exchange assembly includes a distribution box fixedly connected inside the cabinet. The distribution box and the water receiving tray are connected by a distribution pipe. Several absorbent cotton rods are installed on the top of the distribution box. The absorbent cotton rods are flat-topped cones with a continuous spiral coiled shape on their outer periphery. An axial flow fan is installed on the heat dissipation end of the cabinet near the dehumidification device. The axial flow fan is used to collect hot air and blow it to the outer periphery of the absorbent cotton rods. A servo motor for driving the axial flow fan to rotate is fixedly connected inside the cabinet. The cabinet is equipped with an air guide assembly on its exterior, which is used to guide the airflow outside the absorbent cotton swab to be discharged in the same direction. The outside of the diversion box is equipped with a cutting component, which is used to allow the absorbent cotton swab to smoothly absorb and discharge the water inside the diversion box. Each of the absorbent cotton swabs is provided with a quick-release assembly for connection between it and the diversion box.

[0005] Preferably, the air guiding assembly includes a hot air outlet opened on one side of the cabinet and communicating with its interior, and a filter screen installed inside the hot air outlet. The cabinet is rotatably connected to a limiting ring frame, and the limiting ring frame is used to drive the filter screen to rotate around the inside of the hot air outlet. The cabinet is provided with a through hole assembly on the side near the limiting ring frame, and the through hole assembly is used to drive the limiting ring frame to rotate while performing a coarse cleaning of the dust on the surface of the filter screen.

[0006] Preferably, the through-hole assembly includes a positioning frame fixedly connected inside the cabinet, and the positioning frame and the limiting ring frame maintain a corresponding state. A cleaning brush is installed inside the positioning frame, and the brush bristles of the cleaning brush are in contact with the surface of the filter screen. The cleaning brush and the positioning frame are connected by an adjusting bolt, which is used to allow the cleaning brush to be quickly installed and removed from the positioning frame. A drive motor is fixedly connected to the side of the cabinet near the limiting ring frame. A gear is fixedly connected to the output end of the drive motor. A toothed ring that meshes with the gear is fixedly sleeved on the outside of the limiting ring frame.

[0007] Preferably, the dividing assembly includes a dividing frame fixedly connected inside the diversion box, and the dividing frame is designed as an L-shaped structure. The internal space of the diversion box is divided into cavities by the dividing frame. The dividing box is installed on the side of the cabinet close to the diversion box, and the dividing box and the diversion box are connected by a guide pipe. A liquid level sensor is fixedly connected inside the dividing box, and two symmetrical drying fins are fixedly connected inside the dividing box.

[0008] Preferably, a heat dissipation box is connected to both the dividing box and the cabinet. Heat dissipation fins are fixedly connected to the bottom ends of the two drying fins, and one end of the heat dissipation fins passes through the dividing box and extends into the interior of the heat dissipation box. A heat dissipation mesh plate communicating with the interior is fixedly connected to the exterior of the heat dissipation box. A fan is fixedly connected inside the heat dissipation box, and the fan, in coordination with the heat dissipation mesh plate, directs the external heat dissipation fins to discharge heat in a directional manner.

[0009] Preferably, the quick-release assembly includes a traction cylinder fixedly sleeved at the bottom of the absorbent cotton swab and a centering ring frame fixedly connected to the top of the diversion box, and the interior of the centering ring frame is connected to the interior of the diversion box. The outside of the centering ring frame is movably connected to a sliding sleeve, and one end of the traction cylinder passes through the sliding sleeve and the centering ring frame in sequence and is located inside the diversion box. An assembly assembly for connecting the sliding sleeve and the traction cylinder is provided.

[0010] Preferably, the assembly includes a ring climbing frame fixedly sleeved on the outside of the traction cylinder and a support ring frame installed on the top of the centering ring frame. The support ring frame has several floating holes on its outside, and each floating hole is movably connected to a compression ball. A locking groove is formed between the ring climbing frame and the traction cylinder for the compression ball to be inserted. The traction cylinder is positioned for the first time along the centering ring frame through the locking groove and the compression ball working together.

[0011] Preferably, a pushing ring is fixedly connected inside the sliding sleeve, and the pushing ring moves along the outside of the support ring frame and the centering ring frame through the sliding sleeve. A return spring is connected between the pushing ring and the centering ring frame, and the support ring frame and the extrusion ball maintain a slope fit.

[0012] The technical effects and advantages provided by the present invention in the above technical solution are as follows: 1. This invention guides the water inside the water collection tray to the inside of the distribution box, preventing liquid water from dispersing and accumulating inside the cabinet. Then, the ends of four absorbent cotton swabs absorb the condensate inside the distribution box and lock the liquid water on their outer periphery through their own capillary adsorption, forming a conversion path between solid adsorption and gas evaporation. The axial flow fan forces convection to enhance heat exchange, promoting the rapid and uniform evaporation of the adsorbed water. The negative pressure effect of the airflow can immediately strip away the evaporated humid water vapor, preventing water vapor from accumulating around the absorbent cotton swabs and forming a high humidity barrier. Then, the humid and hot air is directly discharged to the outside through the hot air outlet, ensuring that the inside of the cabinet remains in a continuously dry and ventilated state, improving the stability and efficiency of the dehumidification and ventilation process inside the cabinet, and ensuring the stable operation of the internal components of the cabinet. 2. This invention utilizes the synergistic cooperation between an axial flow fan and absorbent cotton swabs. The axial flow fan uses the heat generated by the evaporator and compressor inside the dehumidifying device to power evaporation. This not only quickly converts the water adsorbed on the outer periphery of the absorbent cotton swabs into humid air and allows the humid air to be quickly discharged, but also prevents the formation of a high-humidity microenvironment in the cabinet. Furthermore, it removes excess heat from inside the dehumidifying device, preventing the dehumidifying device from experiencing reduced operating efficiency due to heat buildup. This ensures uniform and stable humidity inside the cabinet and significantly improves the safety and reliability of the switchgear operation. 3. This invention increases the contact area with the airflow through the structure of the absorbent cotton stick itself and extends the airflow movement path, so that the heat exchange between the waste heat and the water absorbed by the absorbent cotton stick is more complete, accelerating the conversion rate of liquid water to gas. At the same time, the flat-top conical structure makes the airflow gradually increase from bottom to top, forming a cascade dehumidification effect of stable flow adsorption at the bottom, accelerated evaporation in the middle and rapid peeling at the top, further improving the dehumidification efficiency inside the cabinet. 4. This invention sets the rotation direction of the filter screen at a tangential angle with the airflow discharge path of the axial flow fan, allowing the airflow to smoothly pass through the mesh of the filter screen along a preset path and be discharged, ensuring unobstructed discharge of humid and hot air. At the same time, when the filter screen rotates, its surface mesh and the airflow form a dynamic relative motion, and the airflow creates a continuous scouring effect on the surface of the filter screen. After the cleaning brush removes the dust from the surface of the filter screen, the centrifugal force generated by the rotation of the filter screen can simultaneously remove the dust attached to the edge of the mesh, effectively ensuring the stability of the exhaust airflow, thereby keeping the inside of the switch cabinet in a dry and clean operating state at all times. 5. This invention uses the airflow pressure generated by the axial flow fan to create a slightly positive pressure environment at the filter and hot air outlet, effectively preventing external humid air from flowing back into the cabinet through the hot air outlet. This forms a two-way protection between internal heat and moisture discharge and external moisture barrier, ensuring not only the directional and efficient discharge of humid air, but also avoiding disturbance to the surrounding environment of electrical components inside the cabinet during the dehumidification process. This ensures uniform and stable humidity inside the cabinet and guarantees the stable operation of the switchgear. 6. This invention uses a segmentation box to act as a temporary buffer, avoiding untimely adsorption caused by excessive liquid water. This allows the adsorption capacity of the absorbent cotton swabs to be dynamically adjusted according to the amount of liquid water. Even under conditions with large fluctuations in dehumidification load, the liquid water will not overflow or accumulate through adsorption followed by gradual evaporation, thus maintaining the continuity of the dehumidification process. This buffering and adjustment capability allows the dehumidification operation in the switchgear to cope with sudden high humidity environments and adapt to long-term low humidity operation requirements, greatly improving the adaptability of the switchgear to complex and variable operating conditions. 7. This invention uses the coordinated operation of the diversion box and the interception box to ensure that the bottom of the absorbent cotton swab is always in stable contact with the liquid water at a constant water level. Combined with its flat-top conical spiral structure, it enables the liquid water to climb evenly along its surface, further improving the stability and uniformity of the dehumidification effect in the switch cabinet. 8. This invention simplifies and expedits the replacement of absorbent swabs through quick-release components, allowing for timely replacement of saturated or aged swabs. This ensures that the swabs maintain strong adsorption performance, preventing insufficient condensate adsorption and reduced evaporation efficiency due to swab performance degradation. Furthermore, timely replacement prevents aging swab fibers from shedding and contaminating the distribution box or blocking airflow channels, ensuring long-term efficient dehumidification operation from the source. This avoids secondary dehumidification risks caused by swab failure and ensures stable operation of the switchgear. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 This is a schematic diagram of the overall structure of the cabinet of the present invention; Figure 2 This is a schematic diagram of the dehumidification device of the present invention; Figure 3 This is a schematic diagram of the structure of the absorbent cotton stick of the present invention; Figure 4 This is a schematic diagram of the structure of the divider frame of the present invention; Figure 5 This is a schematic diagram of the limiting ring frame of the present invention; Figure 6 This is a schematic diagram of the structure of the drying fins of the present invention; Figure 7 This is a schematic diagram of the structure of the sliding sleeve of the present invention; Figure 8 This is a schematic diagram of the structure of the climbing frame of the present invention.

[0015] Explanation of reference numerals in the attached figures: 1. Cabinet; 11. Dehumidifier; 12. Drain tray; 2. Wet and dry exchange assembly; 21. Distribution box; 22. Distribution pipe; 23. Absorbent swabs; 24. Axial flow fan; 25. Servo motor; 3. Air guide assembly; 31. Hot air outlet; 32. Filter screen; 33. Limiting ring bracket; 34. Positioning bracket; 35. Cleaning brush; 36. Drive motor; 37. Gear; 38. Adjusting bolt; 39. Gear ring; 4. Segmentation assembly; 41. Segmentation frame; 42. Segmentation box; 43. Guide pipe; 44. Drying fins; 45. Liquid level sensor; 46. Heat sink; 47. Heat dissipation fins; 48. Fan; 49. Heat dissipation mesh; 5. Quick-release assembly; 51. Traction cylinder; 52. Sliding sleeve; 53. Centering ring frame; 54. Push ring; 55. Return spring; 56. Support ring frame; 57. Ring climbing frame; 58. Snap-fit ​​groove; 59. Floating hole; 501. Extrusion ball. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0017] This invention provides, for example Figure 1 , Figure 2 , Figure 3 and Figure 4 The high-voltage switchgear for smart grids shown includes a cabinet 1 and a dehumidifying device 11. A water receiving tray 12 is provided on the side of the cabinet 1 near the dehumidifying device 11. A dry-wet exchange component 2 is provided inside the cabinet 1, and the dry-wet exchange component 2 is used to work with the dehumidifying device 11 to enhance the dehumidification and ventilation inside the cabinet 1. The wet and dry exchange assembly 2 includes a distribution box 21 fixedly connected inside the cabinet 1. A distribution pipe 22 connects the distribution box 21 and the water receiving tray 12. Several absorbent cotton rods 23 are installed at the top of the distribution box 21. Each absorbent cotton rod 23 is flat-topped and conical with a continuously spiraled outer circumference. An axial flow fan 24 is installed near the heat dissipation end of the cabinet 1 close to the dehumidifier 11. The axial flow fan 24 collects hot air and blows it towards the outer circumference of the absorbent cotton rods 23. A servo motor 25 is fixedly connected inside the cabinet 1 to drive the axial flow fan 24. The specific structure and principle of the cabinet 1 and the dehumidifier 11 are existing technologies, therefore, in this application… Without going into too much detail; currently in the switch cabinet, the dehumidifier 11 is partially divided into an evaporator chamber and a condenser chamber inside the cabinet 1. The dehumidifier 11 also includes a condenser and a thermostat, a compressor and an evaporator, etc., so that the compressor, condenser, thermostat and evaporator can achieve a refrigeration cycle inside the cabinet 1. Moreover, the servo motor 25 is located in the evaporator chamber inside the cabinet 1. At the same time, the controller is used to control the overall power supply to ensure that the dehumidifier 11 and other components can operate normally. In addition, the specific number of absorbent cotton swabs 23 is set to four sets, and the number of quick-release components 5 is the same as that of absorbent cotton swabs 23. Furthermore, a maintenance window is provided on one side of the cabinet 1.

[0018] refer to Figure 2 and Figure 5 As shown, the exterior of the cabinet 1 is provided with an air guide assembly 3, which is used to guide the airflow outside the absorbent cotton swab 23 to be discharged in the same direction. The air guide assembly 3 includes a hot air outlet 31 opened on one side of the cabinet 1 and communicating with its interior, and a filter screen 32 installed inside the hot air outlet 31. The interior of the cabinet 1 is rotatably connected to a limiting ring frame 33, which is used to drive the filter screen 32 to rotate around the inside of the hot air outlet 31. The cabinet 1 is provided with a through hole assembly on the side near the limiting ring frame 33, and the through hole assembly is used to drive the limiting ring frame 33 to rotate while coarsely cleaning the dust on the surface of the filter screen 32. The through-hole assembly includes a positioning frame 34 fixedly connected inside the cabinet 1, and the positioning frame 34 and the limiting ring frame 33 maintain a corresponding state. A cleaning brush 35 is installed inside the positioning frame 34, and the brush end of the cleaning brush 35 is in contact with the surface of the filter screen 32. An adjusting bolt 38 is connected between the cleaning brush 35 and the positioning frame 34, and the adjusting bolt 38 is used to allow the cleaning brush 35 to be quickly installed and removed from the positioning frame 34. A drive motor 36 is fixedly connected to the side of the cabinet 1 near the limit ring frame 33. A gear 37 is fixedly connected to the output end of the drive motor 36. A toothed ring 39 that meshes with the gear 37 is fixedly sleeved on the outside of the limit ring frame 33.

[0019] refer to Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, the outside of the diversion box 21 is provided with a dividing component 4, and the dividing component 4 is used to make the absorbent cotton swab 23 smoothly absorb and discharge the water inside the diversion box 21. The dividing component 4 includes a dividing frame 41 fixedly connected inside the diversion box 21, and the dividing frame 41 is designed with an L-shaped structure. The internal space of the diversion box 21 is divided into cavities by the dividing frame 41. A dividing box 42 is installed on the side of the cabinet 1 close to the diversion box 21, and the dividing box 42 and the diversion box 21 are connected by a guide pipe 43. A liquid level sensor 45 is fixedly connected inside the dividing box 42, and two symmetrical drying fins 44 are fixedly connected inside the dividing box 42. The sectional box 42 and the cabinet 1 are connected together by a heat dissipation box 46. The bottom ends of the two drying fins 44 are fixedly connected to heat dissipation fins 47, and one end of the heat dissipation fins 47 passes through the sectional box 42 and extends into the interior of the heat dissipation box 46. The exterior of the heat dissipation box 46 is fixedly connected to a heat dissipation mesh plate 49 that communicates with its interior. A fan 48 is fixedly connected inside the heat sink 46, and the fan 48, in cooperation with the heat dissipation mesh plate 49, directs the external heat dissipation fins 47 to discharge heat in a directional manner. refer to Figure 3 , Figure 4 and Figure 6 As shown, when the ambient humidity around the dehumidifier 11 is high or the temperature difference between the inside and outside of the cabinet 1 is large, resulting in a large amount of liquid water being generated by the dehumidifier 11 during operation, the shunting component 4 can achieve multi-level linkage between the dehumidifier 11 and the distribution box 21. Firstly, after the liquid water inside the distribution box 21 enters the separation box 42 through the guide pipe 43, the controller, liquid level sensor 45, drying fins 44 and fan 48 cooperate to make the liquid level sensor 45 send a signal to the controller. At this time, the drying fins 44 start working to heat the liquid water inside the separation box 42 to evaporate the liquid water. At the same time, the fan 48 starts to generate airflow outside the heat exhaust fins 47 to accelerate the airflow around the heat exhaust fins 47, so that the drying fins 44 can continuously heat the surrounding liquid water through the heat exhaust fins 47. Secondly, when the water inside the dividing tank 42 is higher than 1 / 2 of the water tank depth, the liquid level sensor 45 sends the liquid level signal to the controller. At this time, the temperature controller adjusts the compressor start temperature. During this process, the drying fins 44 continue to work and, together with the water-absorbing cotton swabs 23, quickly evaporate the water inside the dividing tank 21 and the dividing tank 42. Thirdly, when the absorbent cotton swab 23 loses its absorbency after prolonged use, the water level inside the dividing tank 42 will continue to rise. When the liquid water level reaches 4 / 3 of the tank depth, the controller will stop the compressor. At this time, the drying fins 44 continue to work, accelerating the processing of the liquid water inside the dividing tank 42. When the liquid level in the dividing tank 42 drops to 1 / 3 of the tank depth, the liquid level sensor 45 sends the liquid level information to the controller. At this time, the controller will resume the compressor and activate the temperature reversal in the thermostat. Then, the controller will control the drying fins 44 to stop working.

[0020] refer to Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, each absorbent cotton swab 23 is provided with a quick-release assembly 5 for connection between it and the diversion box 21. The quick-release assembly 5 includes a traction cylinder 51 fixedly sleeved at the bottom end of the absorbent cotton swab 23 and a centering ring frame 53 fixedly connected to the top end of the diversion box 21. The interior of the centering ring frame 53 is connected to the interior of the diversion box 21. A sliding sleeve 52 is movably connected to the exterior of the centering ring frame 53. One end of the traction cylinder 51 passes through the sliding sleeve 52 and the centering ring frame 53 in sequence and is located inside the diversion box 21. The number of floating holes 59 and extrusion balls 501 is six. An assembly assembly for connection is provided between the sliding sleeve 52 and the traction cylinder 51; the assembly assembly includes a ring climbing frame 57 fixedly sleeved on the outside of the traction cylinder 51 and a support ring frame 56 installed on the top of the centering ring frame 53. The support ring frame 56 has several floating holes 59 on its outside. Each floating hole 59 is movably connected to a compression ball 501. A locking groove 58 for the compression ball 501 to be inserted is formed between the ring climbing frame 57 and the traction cylinder 51. The traction cylinder 51 is positioned for the first time along the centering ring frame 53 through the locking groove 58 and the compression ball 501 working together. A push ring 54 is fixedly connected inside the sliding sleeve 52, and the push ring 54 moves along the outside of the support ring frame 56 and the centering ring frame 53 through the sliding sleeve 52. A return spring 55 is connected between the push ring 54 and the centering ring frame 53. The support ring frame 56 and the extrusion ball 501 maintain a slope fit.

[0021] Working principle: When using: refer to Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, when it is necessary to replace the absorbent cotton swab 23 with poor absorbency, first open the inspection window on one side of the cabinet 1 to expose the absorbent cotton swab 23 to the operator's field of vision. Then push the sliding sleeve 52 to move downward along the outside of the centering ring frame 53. The movement of the sliding sleeve 52 will drive the pushing ring 54 to move along the outside of the support ring frame 56 towards the centering ring frame 53. During the displacement, the pushing ring 54 will exert a squeezing effect on the return spring 55. At the same time, when the pushing ring 54 continues to move along the outside of the support ring frame 56, it will slide along the outside of the squeezing ball 501 and release the contact between the two, so that the squeezing ball 501 remains movable through the floating gap formed between the pushing ring 54 and the sliding sleeve 52. refer to Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, the traction cylinder 51 is then pulled upward along the inner side of the centering ring frame 53. During the movement of the traction cylinder 51, the locking groove 58 and the ring climbing frame 57 are simultaneously displaced in the same direction. As the locking groove 58 is displaced, its groove wall comes into contact with the outer side of the squeezing ball 501 and pushes the squeezing ball 501 to slide upward along the inner side of the floating hole 59. The bottom of the squeezing ball 501 slides along the groove of the locking groove 58 to the top of the ring climbing frame 57, and then slides along the top of the ring climbing frame 57 to the outer side of the traction cylinder 51, so that the locking effect of the squeezing ball 501 on the locking groove 58 is completely released. Finally, the traction cylinder 51 is taken out along the inner side of the centering ring frame 53, and the water-absorbing cotton swab 23 can be replaced. refer to Figure 2 , Figure 3 and Figure 4 As shown, when the dehumidifier 11 treats the moisture inside the cabinet 1 and enhances the ventilation inside the cabinet 1, firstly, the water tray 12 collects the condensate generated on the surface of the dehumidifier 11 in advance, and then guides the internal condensate into the distribution box 21 through the preset flow guiding structure, so as to prevent liquid water from dispersing and accumulating inside the cabinet 1 from the source; then, the ends of the four absorbent cotton swabs 23 penetrate into the distribution box 21 to absorb the condensate in the box, and use their own capillary adsorption characteristics to firmly lock the liquid water on their own periphery; At the same time, the condenser and dehumidifier 11 inside the cabinet work together to raise the temperature in the vicinity of the cabinet. As the servo motor 25 drives the axial fan 24 to rotate synchronously, the axial fan 24 blows the hot air generated around it towards the outer periphery of the four absorbent cotton rods 23 during rotation. The heat exchange efficiency is enhanced by forced convection, which accelerates the conversion of liquid water to gas. Subsequently, the negative pressure effect formed by the airflow can quickly peel off the humid water vapor that has evaporated on the surface of the absorbent cotton rods 23, preventing water vapor from accumulating around the cotton rods and forming a high humidity barrier. This ensures that the absorbent cotton rods 23 always maintain an unsaturated adsorption state, thereby continuously and efficiently adsorbing the liquid water in the diversion box 21. refer to Figure 2 , Figure 3 and Figure 5 As shown, during this process, the humid and hot air formed by the evaporation of the absorbent cotton swab 23 gradually flows towards the hot air outlet 31, and is finally discharged to the outside through the combined action of the hot air outlet 31 and the filter screen 32, realizing the outdoor discharge of the humid and hot air inside the cabinet 1. Therefore, the dehumidification device 11 can ensure that the inside of the cabinet 1 always maintains a continuously dry ventilation environment under long-term stable working conditions, significantly improving the stability and efficiency of the dehumidification and ventilation process inside the cabinet 1. refer to Figure 3 , Figure 4 and Figure 6 As shown, when the ambient humidity is high or the temperature difference between the inside and outside of the cabinet 1 is large, resulting in a large amount of liquid water inside the water receiving tray 12, the absorbent cotton swab 23 cannot evaporate the liquid water in time. At this time, liquid water will accumulate in the distribution box 21. First, the partition frame 41 divides the internal space of the distribution box 21 into levels, so that the liquid water in the distribution box 21 is blocked by the partition frame 41 and temporarily stored in the first chamber formed by the partition frame 41 and the distribution box 21, providing a stable water source for the normal adsorption of the absorbent cotton swab 23. As the water in the first chamber continues to accumulate, the liquid water overflows from the top of the partition frame 41 and flows into the second chamber formed by the partition frame 41 and the distribution box 21, and then flows into the distribution box 42 through the guide pipe 43. During the rise of the liquid water level in the distribution box 42, the liquid level sensor 45 monitors the liquid level in real time and transmits the monitoring signal to the controller. After receiving the signal, the controller triggers the drying fins 44 to start running. The drying fins 44 heat the liquid water in the distribution box 42 to accelerate the evaporation of the liquid water. At the same time, the heat generated by the drying fins 44 is conducted to the heat dissipation fins 47. The controller synchronously controls the fan 48 to rotate. When the fan 48 rotates, it forms an airflow inside the heat dissipation box 46. This airflow drives the airflow around the heat dissipation fins 47, thereby carrying away the heat on the surface of the heat dissipation fins 47 and keeping the drying fins 44 at a stable operating temperature. Through the above synergistic effect, the distribution box 21 always maintains the optimal liquid level for the absorbent cotton swabs 23 to absorb, ensuring that the switch cabinet can maintain a stable dehumidification effect under high humidity conditions. refer to Figure 2 and Figure 5 As shown, when continuous airflow is required around the absorbent cotton swab 23, its dehumidification and filter 32 self-cleaning work in synergy as follows: First, the hot air outlet 31 and the axial flow fan 24 precisely construct a directional dehumidification channel. The synergistic effect of the two is reflected in the seamless connection of water vapor generation and rapid discharge, ensuring that the hot and humid air is efficiently discharged along the preset path. At the same time, the filter 32 embedded in the hot air outlet 31 can effectively block external dust, preventing dust from entering the dehumidification channel and ensuring the stable operation of the dehumidification work. Next, the drive motor 36 starts and drives the gear 37 to rotate synchronously. As the gear 37 and the gear ring 39 mesh, the transmission is completed. The movement of the limit ring 33 causes it to rotate smoothly along a preset trajectory inside the cabinet 1. Since the limit ring 33 and the filter screen 32 are fixedly connected, the rotation of the limit ring 33 simultaneously causes the filter screen 32 to rotate coaxially along the inside of the hot air outlet 31. During the rotation of the filter screen 32, its outer surface forms continuous contact friction with the brush end of the cleaning brush 35. Through this contact, the dust adsorbed on the surface of the filter screen 32 is initially cleaned, effectively preventing the mesh of the filter screen 32 from being blocked due to dust accumulation, ensuring the smooth dehumidification of the hot air outlet 31, and thus improving the dehumidification efficiency of the hot and humid air inside the cabinet 1.

[0022] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-voltage switchgear for smart grids, comprising a cabinet (1) and a dehumidifying device (11), wherein a water receiving tray (12) is provided on the side of the cabinet (1) near the dehumidifying device (11), characterized in that: The cabinet (1) is equipped with a dry and wet exchange component (2), and the dry and wet exchange component (2) is used in conjunction with the dehumidification device (11) to enhance the dehumidification and ventilation inside the cabinet (1); The dry and wet exchange assembly (2) includes a distribution box (21) fixedly connected inside the cabinet (1). The distribution box (21) and the water receiving tray (12) are connected by a distribution pipe (22). Several absorbent cotton rods (23) are installed at the top of the distribution box (21). The absorbent cotton rods (23) are flat-topped cones with a continuous spiral coiled shape on their outer periphery. An axial flow fan (24) is installed near the heat dissipation end of the dehumidification device (11) in the cabinet (1). The axial flow fan (24) is used to collect hot air and blow it to the outer periphery of the absorbent cotton rods (23). A servo motor (25) for driving the axial flow fan (24) to rotate is fixedly connected inside the cabinet (1). The cabinet (1) is provided with an air guide assembly (3) on its exterior, and the air guide assembly (3) is used to guide the airflow outside the absorbent cotton swab (23) to be discharged in the same direction. The outside of the diversion box (21) is provided with a cutting component (4), and the cutting component (4) is used to make the absorbent cotton swab (23) smoothly absorb and discharge the water inside the diversion box (21); Each of the absorbent cotton swabs (23) is provided with a quick-release assembly (5) for connection between it and the diversion box (21).

2. The high-voltage switchgear for smart grids according to claim 1, characterized in that: The air guide assembly (3) includes a hot air outlet (31) opened on one side of the cabinet (1) and communicating with its interior, and a filter screen (32) installed inside the hot air outlet (31). The cabinet (1) is rotatably connected to a limiting ring frame (33), and the limiting ring frame (33) is used to drive the filter screen (32) to rotate around the inside of the hot air outlet (31). The cabinet (1) has a through hole assembly on the side near the limiting ring frame (33), and the through hole assembly is used to drive the limiting ring frame (33) to rotate while coarsely cleaning the dust on the surface of the filter screen (32).

3. A high-voltage switchgear for smart grids according to claim 2, characterized in that: The through-hole assembly includes a positioning frame (34) fixedly connected inside the cabinet (1), and the positioning frame (34) and the limiting ring frame (33) maintain a corresponding state. A cleaning brush (35) is installed inside the positioning frame (34), and the brush end of the cleaning brush (35) is in contact with the surface of the filter screen (32). The cleaning brush (35) and the positioning frame (34) are connected by an adjusting bolt (38), and the adjusting bolt (38) is used to allow the cleaning brush (35) to be quickly installed and removed from the positioning frame (34). A drive motor (36) is fixedly connected to the side of the cabinet (1) near the limiting ring frame (33). A gear (37) is fixedly connected to the output end of the drive motor (36). A toothed ring (39) that meshes with the gear (37) is fixedly sleeved on the outside of the limiting ring frame (33).

4. A high-voltage switchgear for smart grids according to claim 1, characterized in that: The dividing assembly (4) includes a dividing frame (41) fixedly connected inside the diversion box (21), and the dividing frame (41) is designed as an L-shaped structure. The internal space of the diversion box (21) is divided into cavities by the dividing frame (41). A dividing box (42) is installed on the side of the cabinet (1) close to the diversion box (21), and a guide pipe (43) is connected between the dividing box (42) and the diversion box (21). A liquid level sensor (45) is fixedly connected inside the dividing box (42), and two symmetrical drying fins (44) are fixedly connected inside the dividing box (42).

5. A high-voltage switchgear for smart grids according to claim 4, characterized in that: The segmented box (42) and the cabinet (1) are connected together by a heat dissipation box (46). The bottom ends of the two drying fins (44) are fixedly connected to heat dissipation fins (47), and one end of the heat dissipation fins (47) passes through the segmented box (42) and extends into the interior of the heat dissipation box (46). The exterior of the heat dissipation box (46) is fixedly connected to a heat dissipation mesh plate (49) that communicates with its interior. A fan (48) is fixedly connected inside the heat dissipation box (46), and the fan (48) discharges heat from the outside of the heat dissipation fins (47) in a directional manner in cooperation with the heat dissipation mesh plate (49).

6. A high-voltage switchgear for smart grids according to claim 1, characterized in that: The quick-release assembly (5) includes a traction cylinder (51) fixedly sleeved at the bottom of the absorbent cotton rod (23) and a centering ring frame (53) fixedly connected to the top of the diversion box (21). The interior of the centering ring frame (53) is connected to the interior of the diversion box (21). The outside of the centering ring frame (53) is movably connected to a sliding sleeve (52). One end of the traction cylinder (51) passes through the sliding sleeve (52) and the centering ring frame (53) in sequence and is located inside the diversion box (21). An assembly assembly for connection is provided between the sliding sleeve (52) and the traction cylinder (51).

7. A high-voltage switchgear for smart grids according to claim 6, characterized in that: The assembly includes a ring climbing frame (57) fixedly sleeved on the outside of the traction cylinder (51) and a support ring frame (56) installed on the top of the centering ring frame (53). The support ring frame (56) has several floating holes (59) on its outside. Each floating hole (59) is movably connected to a compression ball (501). A locking groove (58) is formed between the ring climbing frame (57) and the traction cylinder (51) for the compression ball (501) to be inserted. The traction cylinder (51) is positioned for the first time along the centering ring frame (53) through the cooperation of the locking groove (58) and the compression ball (501).

8. A high-voltage switchgear for smart grids according to claim 7, characterized in that: The sliding sleeve (52) is internally fixedly connected to a push ring (54), and the push ring (54) moves along the outside of the support ring frame (56) and the centering ring frame (53) via the sliding sleeve (52). The push ring (54) and the centering ring frame (53) are connected together by a return spring (55), and the support ring frame (56) and the extrusion ball (501) maintain a slope fit.

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