Gas insulation cabinet with IP67 protection grade full-sealed structure

Abstract

The invention relates to the technical field of gas insulation cabinets, in particular to a gas insulation cabinet with an IP67 protection grade full-sealed structure. The cabinet comprises a cabinet body, a diversion mechanism is arranged in the cabinet body, the diversion mechanism comprises a diversion top plate, and the diversion top plate is fixed at the top in the cabinet body. Through organic cooperation of the flow guide top plate, the vertical flow guide plate, the transverse flow guide plate and the exhaust fan, a closed internal circulation system integrating condensation prevention, dehumidification and heat dissipation functions is constructed, efficient linkage of multiple physical processes is achieved, and when water vapor appears in the cabinet body due to temperature difference change or water absorption and release of an insulating material, the heat dissipation effect is good. The hollow V-shaped flow guide top plate at the top firstly plays a role in interception, the V-shaped structure of the hollow V-shaped flow guide top plate not only effectively reduces condensation vertically dripping to a high-voltage live part below and avoids short circuit or flashover accidents, but also naturally gathers condensate water along an inclined plane and directionally guides the condensate water out through discharge holes in two sides, so that initial guide and path control of the condensation water are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of gas-insulated cabinets, in particular to a gas-insulated cabinet with an IP67 protection grade fully sealed structure. Background Art

[0002] The gas-insulated cabinet with a fully sealed structure with IP67 protection level is an electrical equipment that adopts a fully sealed design and can meet the IP67 protection standard (completely reducing dust intrusion and being unaffected by immersion in water at a depth of 1 meter for 30 minutes).

[0003] Fully sealed gas-insulated cabinets with an IP67 protection rating are often used in harsh environments such as deserts, plateaus, and temperate zones in spring and autumn due to their high level of protection. In these areas, the temperature difference between day and night can reach 20°C or even higher. When the ambient temperature drops sharply at night, the metal cabinet dissipates heat quickly, and its surface temperature quickly drops to near or even below the nighttime ambient temperature, causing condensation. Even when fully sealed and filled with dry gas, condensation may still form in a gas-insulated cabinet. The main reasons are as follows: First, insulating materials such as epoxy resin and silicone rubber absorb moisture during production and storage. After being filled with dry gas, these materials slowly release the absorbed moisture (i.e., desorption). This desorption phenomenon is exacerbated as the temperature rises, causing the water vapor content in the cabinet to increase. Second, in harsh environments such as high humidity, high salt spray, and corrosive media, coupled with vibration and aging caused by long-term operation of the equipment, the cabinet's sealing performance may decrease significantly within 3-5 years, allowing external humid air to infiltrate, further promoting condensation formation. In addition, the cabinet's fully sealed structure makes it difficult to dry internal condensation through external circulation, and it is impossible to expel the humid gas. This makes it easy for water vapor to accumulate in the cabinet, creating conditions for the formation of condensation.

[0004] When condensation adheres to the surface of insulating materials such as epoxy resin and silicone rubber, it reduces the insulation resistance of the material and may even cause surface discharge. This not only undermines the stability of the insulation structure but can also cause phase-to-phase short circuits or short circuits to ground, directly threatening the safe electrical operation of the equipment. In view of this, we propose a gas-insulated cabinet with a fully sealed structure with an IP67 protection level. Summary of the Invention

[0005] The object of the present invention is to provide a gas-insulated cabinet with a fully sealed structure with an IP67 protection grade, so as to solve the problem proposed in the above background technology that it is difficult to form an absolutely sealed environment inside the insulation cabinet, resulting in condensation forming inside the cabinet, thereby affecting the stability of the insulation structure inside the insulation cabinet and causing short circuit.

[0006] To achieve the above object, the present invention provides a gas-insulated cabinet with an IP protection grade fully sealed structure, comprising a cabinet body, wherein a flow guide mechanism is provided in the cabinet body, and the flow guide mechanism comprises: The guide top plate is fixed to the top of the cabinet and adopts a hollow V-shaped structure to reduce condensation dripping into the cabinet and achieve directional guidance; Two vertical guide plates, which are installed in pairs on both sides below the guide top plate. The two vertical guide plates are provided with guide grooves facing the cabinet side to drain condensation, and a return port is provided on the top to promote air circulation; The horizontal guide plate is arranged below the vertical guide plate, has a built-in desiccant and guides the airflow, and an exhaust fan is installed on the top of the cabinet; the guide top plate, the vertical guide plate, the horizontal guide plate and the exhaust fan are enclosed with the inner wall of the cabinet to form an isolated chamber, and the gas drying internal circulation is realized under the drive of the exhaust fan.

[0007] The beneficial effects of the present invention are: 1. In the present invention, the hollow V-shaped structure of the guide top plate intercepts condensation and guides it to the guide groove of the vertical guide plate, achieving directional drainage of condensation and preventing it from dripping onto live components. The return port on the top of the vertical guide plate cooperates with the exhaust fan to form an internal circulating airflow in the isolation chamber, prompting the airflow to flow through the desiccant in the horizontal guide plate, continuously absorbing moisture to reduce humidity and inhibit condensation formation. The three work together to complete a closed-loop control from condensation interception and drainage to moisture removal, which not only reduces the direct harm of condensation to components, but also reduces water vapor accumulation at the source. 2. In the present invention, when the exhaust fan drives the air flow to circulate internally, it not only carries moisture for dehydration through the desiccant, but also accelerates the air flow inside the cabinet, forcing the air flow to take away the heat on the surface of the electrical components and cool them down through convection heat exchange; at the same time, the return port of the vertical guide plate allows the hot air to rise and enter the guide system, and then flow back downward after being treated, breaking the thermal stratification, so that the air flow circulates in the isolated chamber covering the concentrated area of ​​the heating elements, bringing the heat to the low-temperature area, realizing uniform heat dissipation, and taking into account both drying and heat dissipation without adding additional structure, thereby improving the operational stability of the equipment.

[0008] As a further improvement of the present technical solution, the front and back sides of the guide top plate are fixedly connected with V-shaped baffles, and a plurality of exhaust holes for removing condensation are equidistantly provided at the slopes formed on both sides of the guide top plate. The material of the guide top plate is anodized aluminum alloy for rapid heat dissipation, and the guide grooves on the two vertical guide plates correspond one-to-one to the exhaust holes on the guide top plate. The two vertical guide plates are made of stainless steel, and a nano-hydrophilic coating is provided on the guide grooves for inducing rapid formation of water films. Air inlets corresponding to the guide grooves are provided on both sides of the horizontal guide plates, and a fixed box is installed on the inner bottom wall of the horizontal guide plate, and the fixed box is used to place a desiccant (such as a silica gel desiccant, etc.). Two guide plates are installed on both sides of the exhaust fan, and the two guide plates are connected to the inner side wall of the exhaust fan, and the two guide plates are inclined on the side close to the exhaust fan. The fixed box is located below the exhaust fan, and grooves are provided on both sides of the fixed box for gas flow.

[0009] The beneficial effect of adopting the above-mentioned further scheme is that the V-shaped structure of the guide top plate works together with the baffle and the discharge hole to achieve the first-time interception and orderly discharge of condensation, preventing water droplets from directly impacting electrical components; the guide grooves on the vertical guide plate are precisely aligned with the discharge holes of the guide top plate to ensure leakage-free transfer of condensation, and the nano-hydrophilic coating further accelerates the formation and flow of water film, thereby improving drainage efficiency; the air inlet of the horizontal guide plate inherits the output path of the guide groove, realizing seamless connection between the liquid and airflow processing systems; the exhaust fan drives the airflow through the desiccant in the fixed box to complete moisture removal, and the inclined design of the guide plate optimizes the air duct, thereby improving drying uniformity and efficiency.

[0010] As a further improvement of the present technical solution, a sealing door is installed on the front of the cabinet to reduce the entry of dust, moisture and pollutants in the external environment into the cabinet.

[0011] The beneficial effect of adopting the above further solution is that the sealed door ensures the sealing of the cabinet body and facilitates regular maintenance of the cabinet body.

[0012] The difference between the present invention and the prior art is: 1. This gas-insulated cabinet, with an IP67 protection grade and fully sealed structure, constructs a closed internal circulation system that integrates anti-condensation, dehumidification, and heat dissipation functions through the organic coordination of the guide top plate, vertical guide plates, horizontal guide plates, and exhaust fans. This realizes the efficient linkage of multiple physical processes. When water vapor appears inside the cabinet due to temperature changes or desorption and release of moisture from the insulating material, the hollow V-shaped guide top plate at the top first plays an interception role. Its V-shaped structure not only effectively reduces the vertical dripping of condensation onto the high-voltage live components below, avoiding short circuits or flashover accidents, but also naturally collects the condensed water along the slope and directs it out through the discharge holes on both sides, realizing the initial guidance and path control of the condensation.

[0013] 2. This gas-insulated cabinet with an IP67 protection grade fully sealed structure has an exhaust fan installed on the top of the transverse guide plate. When started, negative pressure is formed in the isolated chamber enclosed by the guide top plate, vertical guide plate, transverse guide plate and the inner wall of the cabinet, driving the air to circulate from top to bottom and then upward. Wet air is sucked in through the vertical guide plate area, enters the upper part of the chamber through the return port, and then enters the transverse guide plate after being pressurized by the exhaust fan. The transverse guide plate is equipped with a desiccant fixing box. When the air flows through, moisture is efficiently adsorbed, achieving regeneration and drying of the air. The dried air continues to participate in the circulation, continuously reducing the overall humidity in the cabinet and inhibiting the formation of new condensation. This internal circulation process not only completes the dehumidification function, but also realizes heat management simultaneously. The forced airflow driven by the exhaust fan flows through the concentrated areas of heating components such as busbars and switch connection points during the circulation process, absorbs heat and transports it upward. After the hot air rises to the top, it re-enters the circulation system through the return port of the vertical guide plate, avoiding heat accumulation in the upper part of the cabinet to form a "heat island". The hollow V-shaped guide top plate is made of anodized aluminum alloy with excellent thermal conductivity. It can quickly conduct heat from the top area and take it away with the help of circulating airflow, further enhancing the heat dissipation effect. The entire airflow path breaks the common thermal stratification phenomenon in traditional closed cabinets, making the temperature distribution more uniform, which not only improves the heat dissipation efficiency, but also reduces the risk of condensation by reducing local low-temperature areas.

[0014] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure assembly of the present invention; Figure 2 This is an assembly diagram of the flow guide mechanism of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram at point A in the middle; Figure 4 Schematic diagram of the gas circulation of the present invention; Figure 5 Schematic diagram of the coordination relationship of the various components of the flow guide mechanism of the present invention; Figure 6 This is an assembly diagram of the vertical guide plate of the present invention; Figure 7 Schematic diagram of the transverse guide plate of the present invention; Figure 8 It is a schematic diagram of the position relationship of the fixing box of the present invention.

[0016] The meaning of each number in the figure is: 100. Cabinet; 101. Sealed door; 200, guide mechanism; 201, guide top plate; 2011, baffle; 202, vertical guide plate; 2021, guide trough; 203, horizontal guide plate; 204, exhaust fan; 205, fixing box; 206, guide plate. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0018] The present invention provides the following preferred embodiments See also Figure 1 - Figure 8 As shown, this embodiment provides a gas-insulated cabinet with an IP67 protection grade fully sealed structure, including a cabinet body 100, a flow guide mechanism 200 is provided in the cabinet body 100, and the flow guide mechanism 200 includes: The guide top plate 201 is fixed to the top of the cabinet 100 and adopts a hollow V-shaped structure to reduce condensation dripping into the cabinet 100 and achieve directional guidance; Two vertical guide plates 202 are installed in pairs on both sides below the guide top plate 201. The two vertical guide plates 202 have guide grooves 221 facing the cabinet 100 to drain condensation, and a return port is provided on the top to promote air circulation. A horizontal guide plate 203 is provided in a hollow structure below the vertical guide plate 202. The hollow structure has a built-in desiccant, and an exhaust fan 204 is provided at the top of the inner cavity of the horizontal guide plate 203 to pass through the hollow structure and the middle of the cabinet 100. The guide top plate 201, the vertical guide plate 202, the horizontal guide plate 203 and the exhaust fan 204 are enclosed with the inner wall of the cabinet 100 to form an isolation chamber, which divides the inner cavity of the cabinet 100 into an isolation chamber and a middle area. The exhaust fan 204 connects the isolation chamber and the middle area, and the exhaust fan 204 drives the gas drying internal circulation.

[0019] Therefore, based on the above features, the improvements of the present invention are described in detail: Although the gas-insulated cabinet has a sealed structure with an IP67 protection level, it is difficult to achieve absolute sealing. Even when it is fully sealed and filled with dry gas, condensation may still occur. The reasons include: insulating materials such as silicone rubber will absorb and release moisture later; harsh environments such as high humidity, salt spray, corrosive media, plus vibration and aging caused by long-term operation of the equipment, may significantly reduce the sealing performance within 3-5 years, allowing external humid air to penetrate; due to the fully sealed design, it is difficult to remove moisture or dry the interior through external circulation, so it is easy for water vapor to accumulate in the cabinet, promoting the formation of condensation. Water vapor accumulation and condensation will lead to a decrease in insulation performance (especially the condensation at the top of the inner cavity dripping vertically to the middle of the gas-insulated cabinet), increase the risk of leakage, and may even cause short circuit failures, reducing the safety and reliability of equipment operation; Although some gas-insulated cabinets with IP67 protection and fully sealed structures are equipped with desiccants, they are mostly placed at the bottom of the cabinet, which limits the drying range. The drying effect at the top is even worse, and the probability of condensation forming at the top is greater. Therefore, when water vapor appears in the cabinet 100 due to temperature difference or material desorption and condensation may form on the inner wall or structural surface, the hollow V-shaped guide top plate 201 at the top first intercepts the condensation to reduce its vertical dripping to the live parts, and at the same time guides the condensed water to both sides along the V-shaped slope and flows into the guide groove 2021 on the vertical guide plate 202 below, so as to realize the directional collection and drainage of the condensation; at the same time, the circulation hole return port at the top of the vertical guide plate 202 and the exhaust fan 204 form an air flow channel. After the exhaust fan 204 is started, a negative pressure is generated in the isolated chamber, which promotes the flow of gas inside the cavity to form an internal circulating airflow. When the airflow passes through the inside of the horizontal guide plate 203, it comes into contact with the built-in desiccant, moisture is adsorbed, and the gas is dried. The dried airflow continues to circulate under the drive of the exhaust fan 204, achieving the following effects: 1. In this design, the guide top plate 201, the vertical guide plate 202, the horizontal guide plate 203 and the exhaust fan 204 work together to form an efficient internal environment management system, producing significant linkage benefits. First, the guide top plate 201 adopts a hollow V-shaped structure and is installed on the top of the cabinet 100. It can not only effectively reduce the condensation from directly dripping into the cabinet 100, but also guide the condensation to a set path to avoid potential damage to electrical components caused by water droplets. Two vertical guide plates 202 are installed on both sides below the guide top plate 201. The condensation is drained by opening a guide groove 2021, and a return port is set on the top to promote air circulation. This not only helps the effective discharge of condensation, but also improves the air flow in the cabinet 100 and reduces the possibility of moisture accumulation. The horizontal guide plate 203 is located below the vertical guide plate 202. It contains a desiccant and guides the airflow, further absorbing any remaining moisture. The exhaust fan 204 installed on the top plays a key role, driving the gas in the isolated chamber to dry and circulate internally. During this process, the exhaust fan 204 not only promotes the circulation of air within the cabinet 100, but also uses the effect of the desiccant to continuously reduce the air humidity, effectively suppressing the formation and accumulation of condensation. This achieves comprehensive management from condensation prevention to moisture removal, not only improving the stability of the internal environment of the cabinet 100 and extending the service life of the equipment, but also enhancing the safety and reliability of equipment operation and reducing the risk of failure caused by moisture. At the same time, because the system relies on internal circulation rather than external ventilation, it ensures that the interior of the cabinet 100 can be kept dry even in harsh environments, improving overall protection performance.

[0020] 2. Exhaust fan 204 is installed at the top of transverse guide plate 203. Its operation not only drives the air in the isolated chamber to form an internal circulation, carrying moisture through the desiccant for dehydration, but also accelerates the flow of air within cabinet 100. This forced airflow can effectively remove heat from the surface of electrical components, creating convection heat transfer to reduce the operating temperature of the equipment, thereby achieving heat dissipation; The isolation chamber is enclosed by the guide top plate 201, the vertical guide plate 202, the horizontal guide plate 203 and the inner wall of the cabinet 100, covering the space from the upper part to the middle and lower part of the cabinet 100. This is usually the area where heating elements such as busbars, connection points and switch components are concentrated. When the exhaust fan 204 is started, the air flow circulates in the chamber, absorbs heat when passing near these heating components, and brings it to the relatively low temperature cabinet 100 wall or heat dissipation area, thereby achieving heat dispersion and transfer. In this way, without adding additional ventilation structure, the purpose of drying the internal environment is achieved, and the operating temperature of the equipment is effectively reduced, thereby improving the overall performance and safety.

[0021] Among them: the return circulation hole set on the top of the vertical guide plate 202 allows the air flow to form a path in the vertical direction. Under the suction action of the exhaust fan 204, the hot air rises to the top and can enter the guide system through the circulation hole, and then flows back downward after being dried and guided, effectively breaking the "thermal stratification" phenomenon in which the hot air in the cabinet gathers at the upper part, achieving uniformity of the overall temperature field, and improving the uniformity and efficiency of heat dissipation.

[0022] On the basis of the above, the specific structure is disclosed in detail: To achieve the isolation and diversion of condensation on the top wall of the cabinet 100, the diversion mechanism 200 is disclosed in detail. Figure 2 - Figure 6As shown, a V-shaped baffle 2011 is fixedly connected to the front and back of the guide top plate 201. A plurality of discharge holes for removing condensation are equidistantly provided on the slopes formed on both sides of the guide top plate 201. The guide top plate 201 is made of anodized aluminum alloy. The porous structure of the aluminum oxide layer formed during the anodizing process of the anodized aluminum alloy can increase the surface roughness and expand the effective heat dissipation area, thereby improving the heat convection efficiency and rapidly dissipating heat. The V-shaped baffles 2011 fixed on the front and back of the guide top plate 201 form an enclosed space with the top wall and side walls of the cabinet 100, which can prevent condensation from spreading to the area where the internal components of the cabinet 100 are located, thereby enhancing the interception effect of condensation; and the multiple discharge holes equidistantly opened on the slopes on both sides can discharge the condensation diverted here in time, avoiding the condensation from accumulating on the slopes and overflowing or seeping into the interior of the cabinet 100, which not only strengthens the barrier to condensation, but also improves the timeliness and thoroughness of condensation discharge, thereby ensuring the stability of the internal environment of the cabinet 100.

[0023] Specifically, such as Figure 6 As shown, the guide grooves 2021 on the two vertical guide plates 202 correspond one-to-one to the discharge holes on the guide top plate 201. The two vertical guide plates 202 are made of stainless steel, and the guide grooves 2021 are provided with a nano-hydrophilic coating for inducing rapid formation of a water film. The guide grooves 2021 on the two vertical guide plates 202 correspond one-to-one with the discharge holes of the guide top plate 201, accurately receiving the condensation discharged from the discharge holes and ensuring that the condensation flows smoothly into the guide grooves 2021. The vertical guide plates 202 are made of stainless steel, which can effectively resist condensation corrosion and ensure the long-term stability of the guide structure. The nano-hydrophilic coating on the guide grooves 2021 can induce the rapid formation of a water film, allowing condensation to flow more smoothly within the guide grooves 2021, avoiding stagnation or residue in the grooves. These designs work together to further improve the accuracy, smoothness, and structural durability of condensation drainage, reduce condensation loss during the diversion process and its potential impact on cabinet 100 components, and continuously ensure the stability of the internal environment of cabinet 100.

[0024] Specifically, such as Figure 7 As shown, air inlets corresponding to the guide grooves 2021 are provided on both sides of the transverse guide plate 203, and a fixing box 205 is installed on the inner bottom wall of the transverse guide plate 203. The fixing box 205 is used to place a desiccant such as a silica gel desiccant. Two guide plates 206 are installed on both sides of the exhaust fan 204. The two guide plates 206 are connected to the inner side walls of the exhaust fan 204, and the sides of the two guide plates 206 close to the exhaust fan 204 are inclined. The air inlets on both sides of the transverse guide plate 203 correspond to the guide grooves 2021 on the vertical guide plate 202. This design ensures that moisture generated from various locations inside the cabinet 100 can be effectively collected and guided to the transverse guide plate 203 area. When the exhaust fan 204 is started, a negative pressure is formed in the isolation chamber, prompting air to flow in from the air inlet and move along a predetermined path. This design not only helps to evenly distribute the airflow, but also ensures that moisture does not stagnate in any dead corners. The fixing box 205 is mounted on the inner bottom wall of the transverse guide plate 203 and is used to store a desiccant, such as silica gel desiccant. When moisture passes through the fixing box 205 with the airflow, the moisture in the desiccant is absorbed by the desiccant, thereby drying the air. This step is crucial for reducing the humidity in the entire cabinet 100 and reducing the condensation problem caused by excessive humidity. The guide plates 206 installed on both sides of the exhaust fan 204 are inclined. This structural design can optimize the direction and speed of the airflow. The inclined design allows the airflow to pass through the desiccant area more concentratedly and orderly, thereby enhancing the drying effect. At the same time, this design also helps to improve the air circulation efficiency, ensuring that every corner of the cabinet 100 can be effectively ventilated and dehumidified.

[0025] like Figure 8 As shown, fixed box 205 is located below exhaust fan 204, and grooves are provided on both sides of fixed box 205 for gas flow. Fixed box 205 is located below exhaust fan 204, and the grooves on its two sides provide a channel for gas flow, allowing air entering the interior of transverse guide plate 203 to flow smoothly through the desiccant in fixed box 205. This ensures more complete contact between the airflow and the desiccant, allowing the desiccant to more efficiently absorb moisture from the airflow, improving the gas drying effect. At the same time, the dried gas can flow smoothly to exhaust fan 204 through the grooves, which, in conjunction with the function of guide plate 206, enhance the smoothness of air circulation, further ensuring the stable reduction of gas humidity in the isolation chamber and reducing condensation.

[0026] Furthermore, to achieve sealing of the cabinet 100 , as shown in the figure below, a sealing door 101 is installed on the front of the cabinet 100 for sealing, so as to reduce dust, moisture and pollutants in the external environment from entering the interior of the cabinet 100 .

[0027] It is worth noting that during the day, the cabinet 100 is affected by the external environment and the temperature rises. Driven by the exhaust fan 204, the circulating air enters through the air inlet of the transverse guide plate 203, flows through the desiccant in the fixing box 205 to complete drying, and then flows smoothly through the guide plate 206 and circulates in the isolation chamber. This can promptly remove the water vapor desorbed from the insulating material due to the temperature rise inside the cabinet 100, preventing water vapor accumulation. At the same time, the anodized aluminum alloy material of the guide top plate 201 quickly dissipates heat, reduces local temperature differences, and reduces the possibility of condensation formation. At night, the ambient temperature drops, and the surface temperature of cabinet 100 also drops. The circulating airflow continues to operate, delivering dried air to various parts of cabinet 100, balancing the internal temperature and reducing localized low-temperature areas caused by sudden temperature drops. Simultaneously, the desiccant continuously absorbs water vapor, maintaining a low-humidity environment within the chamber. Combined with the interception and drainage of condensation by the guide top plate 201 and the vertical guide plates 202, this further reduces condensation formation and its impact on internal components, ensuring stable operation of cabinet 100 despite the diurnal temperature difference. (Placing the desiccant in a non-woven fabric and then placing it in the fixing box 205. Wrapping the desiccant in a non-woven bag can reduce its scattering or leakage and prevent the granular desiccant from directly contacting electrical components, thereby reducing the potential risk of short circuits or other electrical failures.) In summary, the overall working steps of the present invention are: When the gas-insulated cabinet is in operation, due to temperature changes or the slow release of absorbed moisture by the insulation material, the air in the cabinet body 100 gradually becomes saturated, and tiny water droplets begin to form on the inner wall or structure surface; At this time, the hollow V-shaped guide top plate 201 located at the top of the cabinet 100 comes into play first. The V-shaped baffles 2011 provided on the front and back of the guide top plate 201 cooperate to guide the condensation to converge along the slope surface, preventing the water droplets from falling vertically onto the high-voltage components below. At the same time, the discharge holes evenly distributed on the slopes on both sides of the guide top plate 201 discharge the collected condensation in an orderly manner to the area below. After the condensation drips or flows down the discharge hole, it falls precisely into the guide grooves 2021 on the two corresponding vertical guide plates 202. The inner surface of the guide grooves 2021 is coated with a nano-hydrophilic coating, which significantly reduces the surface tension of water, prompting the condensation to spread quickly to form a continuous water film, speeding up the water flow and reducing the splashing or retention of water droplets. The vertical guide plates 202 are made of stainless steel, which has excellent corrosion resistance and structural strength, and can maintain stable performance in humid environments for a long time. The guide grooves 2021 guide the condensation to the vicinity of the air inlets on both sides of the transverse guide plate 203. At the same time, the exhaust fan 204 is started, creating a negative pressure in the isolation chamber to drive the air circulation. The humid air enters the interior of the transverse guide plate 203 through the air inlet, passes through the fixing box 205 located below and having grooves on both sides. The silica gel desiccant placed in the box efficiently absorbs moisture in the air to achieve dehydration. The guide plates 206 provided on both sides of the exhaust fan 204 are inclined on the side close to the fan, which can effectively rectify the airflow, so that the airflow passes through the desiccant area more evenly and concentratedly, thereby improving the drying efficiency. The dried air flows upward under the action of the exhaust fan 204 and returns to the guide top plate 201 area through the circulation path, forming a continuous internal circulation. This circulation not only continuously reduces the overall humidity in the cabinet and inhibits the formation of new condensation, but also the flowing dry air promotes the evaporation of residual moisture in the guide groove 2021. The evaporated water vapor is again sucked into the drying system for processing, realizing the closed-loop control of "condensation drainage-airflow drying-circulation regeneration".

[0028] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas-insulated cabinet with a fully sealed structure having an IP67 protection grade, comprising a cabinet body (100), characterized in that: A flow guiding mechanism (200) is provided in the cabinet (100), and the flow guiding mechanism (200) comprises: A flow guide top plate (201), wherein the flow guide top plate (201) is fixed to the top of the cabinet (100), and the bottom of the flow guide top plate (201) is a hollow V-shaped structure for directional condensation diversion; Two vertical guide plates (202), the two vertical guide plates (202) being symmetrically mounted on both sides below the guide top plate (201), and the two vertical guide plates (202) being provided with guide grooves (221) for draining condensation on the sides facing the cabinet (100); A transverse guide plate (203) is provided in a hollow structure below the vertical guide plate (202), the hollow structure having a built-in desiccant, and an exhaust fan (204) is provided at the top of the inner cavity of the transverse guide plate (203) for penetrating the hollow structure and the middle of the cabinet (100); wherein: The guide top plate (201), the vertical guide plate (202), the horizontal guide plate (203) and the exhaust fan (204) are enclosed with the inner wall of the cabinet (100) to form an isolated chamber.

2. The gas-insulated cabinet with an IP67 protection grade fully sealed structure according to claim 1, characterized in that: The front and back sides of the guide top plate (201) are both fixedly connected with V-shaped baffles (2011), and a plurality of discharge holes for removing condensation are equidistantly provided at the slopes formed on both sides of the guide top plate (201).

3. The gas-insulated cabinet with an IP67 protection grade fully sealed structure according to claim 1, characterized in that: The guide top plate (201) is made of anodized aluminum alloy for rapid heat dissipation.

4. The gas-insulated cabinet with an IP67 protection grade fully sealed structure according to claim 1, characterized in that: The guide grooves (2021) on the two vertical guide plates (202) correspond one to one with the discharge holes on the guide top plate (201), and the two vertical guide plates (202) are made of stainless steel.

5. The gas-insulated cabinet with an IP67 protection grade fully sealed structure according to claim 1, characterized in that: The guide groove (221) is provided with a nano-hydrophilic coating for inducing rapid forming of a water film.

6. The gas-insulated cabinet with an IP67 protection grade fully sealed structure according to claim 1, characterized in that: Air inlets corresponding to the guide grooves (2021) are provided on both sides of the transverse guide plate (203), and a fixing box (205) is installed on the inner bottom wall of the transverse guide plate (203).

7. The gas-insulated cabinet with an IP67 protection grade fully sealed structure according to claim 6, characterized in that: The fixing box (205) is used to place a desiccant, and two guide plates (206) are installed on both sides of the exhaust fan (204).

8. The gas-insulated cabinet with an IP67 protection grade fully sealed structure according to claim 7, characterized in that: The two guide plates (206) are connected to the inner side wall of the exhaust fan (204), and the sides of the two guide plates (206) close to the exhaust fan (204) are in an inclined shape.

9. The gas-insulated cabinet with an IP67 protection grade fully sealed structure according to claim 6, characterized in that: The fixing box (205) is located below the exhaust fan (204), and grooves for gas flow are provided on both sides of the fixing box (205).

10. The gas-insulated cabinet with a fully sealed structure with IP67 protection grade according to claim 1, characterized in that: A sealing door (101) is installed on the front of the cabinet (100) for sealing, so as to reduce dust, moisture and pollutants in the external environment from entering the interior of the cabinet (100).

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