A gas insulated switchgear with IP67 protection level full sealing structure

Abstract

The present application relates to the technical field of gas insulated switchgear, in particular to a gas insulated switchgear with IP67 protection level and full sealing structure. It comprises a cabinet body, a flow guide mechanism is arranged in the cabinet body, and the flow guide mechanism comprises a flow guide top plate fixed to the top of the cabinet body. The organic cooperation of the flow guide top plate, vertical flow guide plate, horizontal flow guide plate and exhaust fan constructs a closed internal circulation system integrating anti-condensation, dehumidification and heat dissipation functions, and realizes efficient linkage of multiple physical processes. When water vapor appears in the cabinet body due to temperature difference change or water release of insulation material, the hollow V-shaped flow guide top plate at the top first plays an intercepting role. The V-shaped structure not only effectively reduces the vertical dripping of condensation to the lower high-voltage charged components, avoids causing short circuit or flashover accidents, but also naturally collects the condensed water along the inclined plane and directs it out through the two side discharge holes, realizing initial guidance and path control of condensation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas insulated switchgear, in particular to a gas insulated switchgear with IP67 protection level full sealing structure. BACKGROUND

[0002] The gas insulated switchgear with IP67 protection level full sealing structure is an electrical equipment with full sealing design, which can achieve IP67 protection standard (completely reduce dust invasion, and not affected in 1 meter deep water for 30 minutes).

[0003] The gas insulated switchgear with IP67 protection level full sealing structure is often used in harsh environments such as deserts, plateaus and temperate zones in spring and autumn, because it has high-level protection function. The temperature difference between day and night in these areas can reach 20°C or even higher. When the ambient temperature drops sharply at night, the metal cabinet body cools down quickly, and its surface temperature will quickly drop to close to or even below the ambient temperature at night, and then condensation is formed.

[0004] Even in the state of full sealing and filled with dry gas, the gas insulated switchgear can still form condensation. The main reasons are as follows: on the one hand, the epoxy resin, silicone rubber and other insulating materials will adsorb water during production and storage. After filling with dry gas, these materials will slowly release the adsorbed water (i.e. desorption), and the desorption phenomenon will intensify when the temperature rises, which will increase the water vapor content in the cabinet. On the other hand, in harsh environments such as high humidity, high salt fog and corrosive medium, combined with the vibration and aging generated by long-term operation of the equipment, the sealing performance of the cabinet body may decrease significantly within 3-5 years, which will lead to the infiltration of external humid air and further promote the formation of condensation. In addition, due to the full sealing structure of the cabinet body, it is difficult to dry the internal condensation by external circulation, and it is also difficult to discharge the humid gas, which makes it easy for water vapor to accumulate in the cabinet and creates conditions for the formation of condensation.

[0005] When condensation adheres to the surface of epoxy resin, silicone rubber and other insulating materials, it will reduce the insulation resistance of the materials, and even may cause surface discharge phenomenon, which not only will destroy the stability of the insulation structure, but also may cause inter-phase short circuit or ground short circuit, directly threatening the electrical safety operation of the equipment. In view of this, we propose a gas insulated switchgear with IP67 protection level full sealing structure. SUMMARY

[0006] The purpose of the present application is to provide a gas insulated switchgear with IP67 protection level full sealing structure, to solve the problem that it is difficult to form an absolute sealed environment in the insulation cabinet, which leads to the formation of condensation in the cabinet, thereby affecting the stability of the insulation structure in the insulation cabinet and causing short circuit.

[0007] In order to achieve the above-mentioned purpose, the application provides a gas insulation cabinet with IP protection level full sealing structure, which comprises a cabinet body, a flow guide mechanism arranged in the cabinet body, and the flow guide mechanism comprises:

[0008] A flow guide top plate is fixed to the top of the cabinet body, adopts a hollow V-shaped structure, and is used for reducing condensation dripping into the cabinet body and realizing directional flow guide.

[0009] Two vertical flow guide plates are installed on both sides below the flow guide top plate, the flow guide grooves are arranged on the vertical flow guide plates facing the side of the cabinet body, and the backflow openings are arranged at the top of the vertical flow guide plates to promote air circulation.

[0010] A horizontal flow guide plate is arranged below the vertical flow guide plate, the desiccant is arranged in the horizontal flow guide plate, the air flow is guided, and an exhaust fan is arranged at the top of the horizontal flow guide plate; the flow guide top plate, the vertical flow guide plate, the horizontal flow guide plate and the exhaust fan form an isolated chamber together with the inner wall of the cabinet body, and the air drying internal circulation is realized under the driving of the exhaust fan.

[0011] The application has the following beneficial effects:

[0012] 1. In the application, the hollow V-shaped structure of the flow guide top plate intercepts condensation and guides the condensation to the flow guide groove of the vertical flow guide plate, realizes directional drainage of the condensation, avoids the condensation from falling on the charged components, the backflow opening at the top of the vertical flow guide plate cooperates with the exhaust fan to form internal circulation air flow in the isolated chamber, the air flow flows through the desiccant in the horizontal flow guide plate, continuously adsorbs moisture to reduce humidity, inhibits the formation of condensation, and the three linkages complete the closed-loop control from condensation interception, drainage to moisture removal, which not only reduces the direct harm of condensation to elements, but also reduces water vapor accumulation from the source.

[0013] 2. In the application, when the exhaust fan drives the internal circulation of the air flow, not only the moisture is removed by the desiccant, but also the air flow in the cabinet body is accelerated, the heat on the surface of the electrical element is forced to be carried away by the air flow, and the heat is removed through convection heat exchange; at the same time, the backflow opening of the vertical flow guide plate makes the hot air rise and then enter the flow guide system, the hot air is processed and then backflows downward, the thermal stratification is broken, the air flow is circulated in the isolated chamber covering the concentrated area of the heating element, the heat is carried to the low-temperature area, the heat dissipation is homogenized, the dryness and the heat dissipation are considered in the case of not increasing additional structures, and the operation stability of the equipment is improved.

[0014] As a further improvement of the technical solution, the front and back of the flow guide top plate are fixedly connected with V-shaped baffles, a plurality of discharge holes for discharging condensation are equidistantly arranged on the slopes formed on both sides of the flow guide top plate, the material of the flow guide top plate is an anodized aluminum alloy for rapid heat dissipation, the flow guide grooves on the two vertical flow guide plates correspond to the discharge holes on the flow guide top plate one by one, the material of the two vertical flow guide plates is stainless steel, a nano-hydrophilic coating is arranged on the flow guide groove for inducing the rapid formation of a water film, air inlets corresponding to the flow guide grooves are arranged on both sides of the horizontal flow guide plate, and a fixing box is mounted on the inner bottom wall of the horizontal flow guide plate, the fixing box is used for placing a desiccant (such as a silica gel desiccant), two guide plates are mounted on both sides of the exhaust fan, the two guide plates are connected with the inner side walls of the exhaust fan, and the side of the two guide plates close to the exhaust fan is inclined, the fixing box is located below the exhaust fan, and grooves are arranged on both sides of the fixing box for gas flow.

[0015] The beneficial effects of the above further scheme are that the V-shaped structure of the flow guide top plate, the baffle and the discharge hole work together to realize the first-time interception and orderly export of condensation, avoiding direct impact of water droplets on electrical components; the flow guide grooves on the vertical flow guide plate are accurately aligned with the discharge holes on the flow guide top plate, ensuring that there is no leakage of condensation, and the nano-hydrophilic coating further accelerates the formation and flow of the water film, improving the drainage efficiency; the air inlet of the horizontal flow guide plate connects the output path of the flow guide groove, realizing seamless connection of the liquid and air flow treatment system; the exhaust fan drives the air flow to pass through the desiccant in the fixing box to remove moisture, and the inclined design of the guide plate optimizes the air duct, improving the uniformity and efficiency of drying.

[0016] As a further improvement of the technical solution, the front of the cabinet body is provided with a sealing door for sealing, which reduces the entry of dust, moisture and pollutants in the external environment into the interior of the cabinet body.

[0017] The beneficial effects of the above further scheme are that the sealing door ensures the sealing of the cabinet body while facilitating regular maintenance of the cabinet body.

[0018] The difference between the present application and the prior art is:

[0019] 1. The gas insulated cabinet with IP67 protection level full sealing structure, through the organic cooperation of the flow guide top plate, the vertical flow guide plate, the horizontal flow guide plate and the exhaust fan, a closed internal circulation system integrating dew condensation prevention, dehumidification and heat dissipation functions is constructed, efficient linkage of multiple physical processes is realized, when water vapor appears in the cabinet body due to temperature difference change or water release of insulation materials, the hollow V-shaped flow guide top plate at the top first plays an intercepting role, the V-shaped structure not only effectively reduces the vertical dripping of dew condensation to the lower high-voltage charged components, avoids causing short circuit or flashover accidents, but also naturally collects the condensed water along the inclined surface and directs the condensed water out through the two side discharge holes, realizing initial guidance and path control of the dew condensation.

[0020] 2. The gas insulated cabinet with IP67 protection level full sealing structure, the exhaust fan is installed at the inner top of the horizontal flow guide plate, after starting, negative pressure is formed in the isolated chamber surrounded by the flow guide top plate, the vertical flow guide plate, the horizontal flow guide plate and the inner wall of the cabinet body, air is driven to flow from top to bottom and then upwards, the humid air is sucked into the upper part of the chamber through the vertical flow guide plate area, then enters the inside of the horizontal flow guide plate after being pressurized by the exhaust fan, the inside of the horizontal flow guide plate is provided with a desiccant fixing box, moisture is efficiently adsorbed when the airflow passes through, realizing regenerative drying of the air, the dried air continues to participate in the circulation, continuously reducing the overall humidity in the cabinet and inhibiting the generation of new dew condensation.

[0021] This internal circulation process not only completes the dehumidification function, but also simultaneously realizes heat dissipation management, the forced airflow driven by the exhaust fan flows through the concentrated area of heat generating elements such as the bus and the switch connection point in the circulation process, absorbs heat and transports it upwards, the hot air rises to the top and reenters the circulation system through the backflow port of the vertical flow guide plate, avoiding the accumulation of heat in the upper part of the cabinet body to form a “heat island”, the hollow V-shaped flow guide top plate is made of anodized aluminum alloy material, has excellent thermal conductivity, can quickly conduct the heat in the top area and take it away with the help of the circulating airflow, further strengthening the heat dissipation effect, the entire airflow path breaks the common heat stratification phenomenon in the traditional closed cabinet, makes the temperature distribution more uniform, not only improves the heat dissipation efficiency, but also reduces the dew condensation risk due to the reduction of local low temperature area.

[0022] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the present application;

[0024] Figure 2 is an assembly drawing of the flow guide mechanism of the present application;

[0025] Figure 3 is a schematic diagram of the internal circulation system of the present application Figure 2Schematic diagram at middle A;

[0026] Figure 4 Schematic diagram of gas circulation of the present application;

[0027] Figure 5 Schematic diagram of the cooperation of each part of the flow guide mechanism of the present application;

[0028] Figure 6 Assembly drawing of the vertical flow guide plate of the present application;

[0029] Figure 7 Schematic diagram of the horizontal flow guide plate of the present application;

[0030] Figure 8 Schematic diagram of the position relationship of the fixing box of the present application.

[0031] The meanings of the various reference numbers in the drawings are as follows:

[0032] 100, cabinet body; 101, sealing door;

[0033] 200, flow guide mechanism; 201, flow guide top plate; 2011, baffle; 202, vertical flow guide plate; 2021, flow guide groove; 203, horizontal flow guide plate; 204, exhaust fan; 205, fixing box; 206, guide plate. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0035] The present application provides the following preferred embodiments

[0036] Please refer to Figure 1 - Figure 8 The present embodiment provides a gas insulated cabinet with IP67 protection level full sealing structure, which comprises a cabinet body 100, a flow guide mechanism 200 is arranged in the cabinet body 100, and the flow guide mechanism 200 comprises:

[0037] A flow guide top plate 201 is fixed to the top of the cabinet body 100 and adopts a hollow V-shaped structure, which is used for reducing the condensation dripping into the cabinet body 100 and realizing directional flow guide;

[0038] Two vertical flow guide plates 202 are installed on both sides below the flow guide top plate 201, the flow guide grooves 2021 are arranged on the sides of the two vertical flow guide plates 202 facing the cabinet body 100 to guide the condensation, and the top of each vertical flow guide plate 202 is provided with a backflow port to promote air circulation;

[0039] The transverse flow guide plate 203 is arranged in the hollow structure below the vertical flow guide plate 202, the hollow structure is internally provided with a desiccant, and the inner cavity of the transverse flow guide plate 203 is provided with an exhaust fan 204 for penetrating the hollow structure and the middle part of the cabinet body 100;

[0040] The flow guide top plate 201, the vertical flow guide plate 202, the transverse flow guide plate 203 and the exhaust fan 204 are surrounded by the inner wall of the cabinet body 100 to form an isolated chamber, so as to divide the inner cavity of the cabinet body 100 into the isolated chamber and the middle part region, the exhaust fan 204 communicates the isolated chamber and the middle part region, and under the driving of the exhaust fan 204, the internal circulation of the gas drying is realized.

[0041] Therefore, based on the above characteristics, the improvement points of the present application are described in detail:

[0042] Although the gas insulated cabinet has a sealing structure with IP67 protection level, it is difficult to achieve absolute sealing. Even in the case of full sealing and internal filling of dry gas, condensation phenomenon may still occur. The reasons include: the insulating materials such as silicone rubber can absorb and release water in the subsequent process; the vibration and aging caused by long-term operation of the equipment in harsh environments such as high humidity, salt spray and corrosive medium can significantly reduce the sealing performance in 3-5 years, allowing external humid air to penetrate; due to the full sealing design, it is difficult to remove moisture by external circulation or dry the inside, so it is easy to accumulate water vapor in the cabinet, promote the formation of condensation, and the accumulation of water vapor and condensation can cause the insulation performance to decrease (especially the vertical condensation dripping from the top of the inner cavity to the middle part of the gas insulated cabinet), increase the risk of electric leakage, and even cause short circuit failure, reduce the safety and reliability of the equipment operation;

[0043] Although some gas insulated cabinets with IP67 protection level full sealing structure are provided with a desiccant inside, the desiccant is mostly arranged at the bottom of the gas insulated cabinet, the drying range is limited, the drying effect at the top is worse, and the probability of condensation at the top is greater;

[0044] Therefore, when water vapor appears in the cabinet body 100 due to temperature difference or material desorption, and condensation may be formed on the inner wall or the surface of the structure, the hollow V-shaped flow guide top plate 201 at the top first intercepts the condensation, reduces its vertical dripping to the charged components, at the same time, the condensate is guided along the V-shaped slope to both sides and flows into the flow guide groove 2021 on the vertical flow guide plate 202 below, realizing the directional collection and drainage of the condensation; at the same time, the circulating backflow port at the top of the vertical flow guide plate 202 forms an air flow channel with the exhaust fan 204, and after the exhaust fan 204 is started, a negative pressure is generated in the isolated chamber, so as to promote the flow of the gas inside the cavity, form an internal circulation air flow, and the air flow contacts the desiccant after passing through the inside of the transverse flow guide plate 203, the moisture is absorbed, the gas is dried, and the dried air flow continues to circulate under the driving of the exhaust fan 204, achieving the following effects:

[0045] 1、In this design, the flow guide top plate 201, vertical flow guide plate 202, horizontal flow guide plate 203 and exhaust fan 204 work together to form an efficient internal environment management system, producing significant linkage benefits. First, the flow guide top plate 201 is installed in the hollow V-shaped structure on the top of the cabinet 100, which not only effectively reduces the direct dripping of condensation into the cabinet 100, but also guides the condensation to the designated path, avoiding potential harm to electrical components. Two vertical flow guide plates 202 are installed on both sides below the flow guide top plate 201, with a flow guide groove 2021 to drain the condensation, and a backflow port at the top to promote air circulation. This not only helps to effectively drain the condensation, but also improves air flow in the cabinet 100, reducing the likelihood of moisture accumulation.

[0046] The horizontal flow guide plate 203 is located below the vertical flow guide plate 202, with a built-in desiccant and air guide, further absorbing any remaining moisture. The exhaust fan 204 installed on the inner top of the horizontal flow guide plate 203 plays a key role in driving the air in the insulated chamber to circulate and dry. In this process, the exhaust fan 204 not only promotes air circulation in the cabinet 100, but also continuously reduces air humidity using the desiccant, effectively inhibiting 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 the equipment operation, reducing the risk of failures caused by moisture. At the same time, since the system relies on internal circulation rather than external ventilation, it ensures that the cabinet 100 remains dry even in harsh environments, improving overall protection performance.

[0047] 2、The exhaust fan 204 is installed on the inner top of the horizontal flow guide plate 203, which not only drives the air in the insulated chamber to form an internal circulation to carry moisture through the desiccant for dehydration, but also accelerates the air flow in the cabinet 100. This forced air flow can effectively carry away the heat on the surface of electrical components, reducing the equipment operating temperature by forming convective heat transfer, thereby achieving heat dissipation.

[0048] The insulated chamber is formed by the flow guide top plate 201, vertical flow guide plate 202, horizontal flow 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 heat-generating components such as busbars, connection points and switch components are concentrated. When the exhaust fan 204 starts, the air circulates in the chamber, absorbs heat when passing through these heat-generating components, and carries it to the relatively lower temperature wall of the cabinet 100 or the heat dissipation area, achieving heat dispersion and transfer. In this way, without adding additional ventilation structures, the purpose of drying the internal environment is achieved, and the equipment operating temperature is effectively reduced, improving overall performance and safety.

[0049] The circulation holes of the backflow port arranged at the top of the vertical flow guide plate 202 enable the air flow to form a passage in the vertical direction. Under the suction of the exhaust fan 204, the hot air rises to the top and then enters the flow guide system through the circulation holes, and then is dried and guided to flow back downward. The "thermal stratification" phenomenon of the hot air gathering in the upper part of the cabinet is effectively broken, the uniformity of the overall temperature field is realized, and the uniformity and efficiency of heat dissipation are improved.

[0050] On the basis of the above, the specific structure is disclosed in detail.

[0051] To achieve the isolation and flow guide of the condensation on the top wall of the cabinet body 100, the flow guide mechanism 200 is disclosed in detail, and specifically as shown in Figure 2 Figure 6 The front and back surfaces of the flow guide top plate 201 are fixedly connected with V-shaped baffles 2011. A plurality of discharge holes for discharging condensation are arranged at equal intervals on the slopes formed on both sides of the flow guide top plate 201. The material of the flow guide top plate 201 is an anodized aluminum alloy. During the anodization process of the anodized aluminum alloy, an aluminum oxide layer is formed. The porous structure of the oxidation layer can increase the surface roughness and expand the effective heat dissipation area, thereby improving the heat convection efficiency and rapidly dissipating heat.

[0052] The V-shaped baffles 2011 fixed on the front and back surfaces of the flow guide top plate 201 form a closed space with the top wall and the side wall of the cabinet body 100, which can block the spread of condensation to the area where the internal elements of the cabinet body 100 are located, thereby enhancing the interception effect of the condensation. The plurality of discharge holes arranged at equal intervals on the slopes of both sides can timely discharge the condensation guided to this place, thereby avoiding the overflow or infiltration of the condensation accumulated on the slopes into the cabinet body 100, strengthening the blocking of the condensation, improving the timeliness and completeness of the condensation discharge, and ensuring the stability of the internal environment of the cabinet body 100.

[0053] Specifically, as shown in Figure 6 The flow guide grooves 2021 on the two vertical flow guide plates 202 correspond to the discharge holes on the flow guide top plate 201 one by one. The material of the two vertical flow guide plates 202 is stainless steel, and the flow guide grooves 2021 are provided with a nano hydrophilic coating for inducing the rapid formation of a water film.

[0054] ​The guide grooves 2021 on the two vertical guide plates 202 correspond to the exhaust holes of the guide top plate 201 one by one, can accurately receive the condensation water discharged from the exhaust holes, and ensure that the condensation water flows smoothly into the guide grooves 2021; the vertical guide plate 202 is made of stainless steel material, which can effectively resist the corrosion of the condensation water and ensure the long-term stability of the guide structure; and the nano hydrophilic coating on the guide groove 2021 can induce the rapid formation of water film, so that the condensation water flows more smoothly in the guide groove 2021, avoiding stagnation or residue in the groove. These designs cooperate with each other to further improve the accuracy, smoothness and durability of the condensation water drainage, reduce the loss of condensation water in the drainage process and the potential impact on the components of the cabinet 100, and continuously ensure the stability of the internal environment of the cabinet 100.

[0055] Specifically, as shown in Figure 7 The two sides of the horizontal guide plate 203 are provided with air inlets corresponding to the guide grooves 2021, and the fixed box 205 is installed on the inner bottom wall of the horizontal guide plate 203, which is used to place the desiccant such as silica gel desiccant, and the two guide plates 206 are installed on the two sides of the exhaust fan 204, which are connected with the inner side wall of the exhaust fan 204, and the side of the two guide plates 206 close to the exhaust fan 204 is inclined;

[0056] The air inlets on the two sides of the horizontal guide plate 203 correspond to the guide grooves 2021 on the vertical guide plate 202, which can ensure that the humidity generated in each part of the cabinet 100 can be effectively collected and guided to the area of the horizontal guide plate 203. When the exhaust fan 204 is started, negative pressure will be formed in the isolation chamber, which will make air flow into the air inlet and move along the predetermined path. This design not only helps to evenly distribute the airflow, but also ensures that the humidity will not be stagnant in any dead angle;

[0057] The fixed box 205 is installed on the inner bottom wall of the horizontal guide plate 203, which is used to place the desiccant such as silica gel desiccant. When the humidity flows through the fixed box 205 with the airflow, the moisture in it will be absorbed by the desiccant, thereby realizing the drying of the air. This step is crucial for reducing the humidity in the entire cabinet 100 and reducing the problem of condensation caused by high humidity;

[0058] The guide plates 206 installed on the two sides of the exhaust fan 204 are inclined, which can optimize the direction and speed of the airflow. The inclined design makes the airflow more concentrated and orderly through the desiccant area, 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.

[0059] As shown in Figure 8As shown, the fixed box 205 is located below the exhaust fan 204, and recesses are formed on both sides of the fixed box 205 for gas flow; the fixed box 205 is located below the exhaust fan 204, and the recesses formed on both sides thereof provide channels for gas flow, so that the air flow entering the inside of the horizontal guide plate 203 can smoothly flow through the desiccant in the fixed box 205, so that the air flow and the desiccant are more fully contacted, the desiccant can more efficiently adsorb the water vapor in the air flow, and the air drying effect is improved. At the same time, the dried gas can smoothly flow to the exhaust fan 204 through the recesses, and the flow smoothness of the air circulation is enhanced by the action of the guide plate 206, further ensuring the stable reduction of the humidity of the gas in the isolation chamber, and reducing the formation of condensation.

[0060] Further, to realize the sealing of the cabinet 100, as shown in the following figure, a sealing door 101 for sealing is installed on the front of the cabinet 100, which is used to reduce the dust, humidity and pollutants in the external environment from entering the inside of the cabinet 100.

[0061] It is worth noting that: during the day, the temperature of the cabinet 100 is increased due to the influence of the external environment, the circulating air flow enters through the air inlet of the horizontal guide plate 203 under the driving of the exhaust fan 204, flows through the desiccant in the fixed box 205 to complete drying, and then smoothly flows through the guide plate 206 and circulates in the isolation chamber, which can timely take away the water vapor desorbed from the insulation material due to the temperature rise inside the cabinet 100, avoid the accumulation of water vapor, and the anodized aluminum alloy material of the guide top plate 201 quickly dissipates heat, reduces the local temperature difference, and reduces the possibility of condensation formation;

[0062] At night, the ambient temperature decreases, and the surface temperature of the cabinet 100 decreases accordingly. The circulating air flow continues to operate, and the dried gas can be transported to each part of the cabinet 100 to balance the internal temperature and reduce the local low-temperature area caused by the sudden temperature drop. At the same time, the desiccant continuously adsorbs water vapor to maintain a low-humidity environment in the chamber, and cooperates with the interception and drainage of the condensation by the guide top plate 201 and the vertical guide plate 202 to further reduce the formation of condensation and the influence on the internal elements, thereby ensuring the stable operation of the cabinet 100 under the change of day and night temperature difference. (The desiccant is placed in the non-woven fabric and then placed in the fixed box 205. Wrapping the desiccant with a non-woven fabric bag can reduce its scattering or leakage, avoid direct contact between the granular desiccant and the electrical elements, and thus reduce the potential short circuit risk or other electrical faults)

[0063] In summary, the overall working steps of the present application are as follows:

[0064] When the gas insulated cabinet is in operation, due to the temperature difference change or the slow release of the adsorbed water by the insulation material, the air in the cabinet 100 gradually tends to be saturated, and begins to form tiny water droplets on the inner wall or structure surface;

[0065] At this time, the hollow V-shaped flow guide top plate 201 located at the top of the cabinet body 100 first plays a role, and the V-shaped baffle 2011 arranged on the front and back surfaces cooperates to guide the condensation to converge along the slope surface, avoiding the water droplets from falling vertically to the high-voltage element below, and at the same time, the discharge holes equidistantly distributed on the two sides of the flow guide top plate 201 orderly discharge the condensed water collected to the area below;

[0066] After the condensed water drops or flows down along the discharge holes, it accurately falls into the flow guide grooves 2021 on the two vertical flow guide plates 202 corresponding thereto, the inner surface of the flow guide grooves 2021 is coated with a nano hydrophilic coating, which significantly reduces the surface tension of water, promotes the rapid spreading of the condensed water to form a continuous water film, accelerates the water flow speed, reduces water droplet splashing or retention, and the vertical flow guide plate 202 is made of stainless steel, which has excellent corrosion resistance and structural strength, and can still maintain stable performance in a humid environment for a long time;

[0067] The flow guide grooves 2021 guide the condensed water to the air inlet near the two sides of the horizontal flow guide plate 203, at the same time, the exhaust fan 204 is started to form a negative pressure to drive air circulation in the isolated chamber, the humid air enters the inside of the horizontal flow guide plate 203 through the air inlet, passes through the fixed box 205 located below and having grooves opened on both sides, and the silica gel desiccant placed in the box efficiently adsorbs the moisture in the air to realize dehydration treatment, and the guide plates 206 arranged on both sides of the exhaust fan 204 are inclined near the side of the fan, which can effectively straighten the airflow, so that the airflow is more uniform and concentrated through the desiccant area, improving the drying efficiency;

[0068] After drying, the air flows upward under the action of the exhaust fan 204, returns to the flow guide top plate 201 area through the circulation path, and forms a continuous internal circulation, which not only continuously reduces the overall humidity in the cabinet and inhibits the generation of new condensed water, but also promotes the evaporation of residual moisture in the flow guide grooves 2021, and the evaporated water vapor is again sucked into the drying system for treatment, realizing the closed-loop control of "condensed water drainage-airflow drying-circulation regeneration".

[0069] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A gas insulated switchgear having an IP67 protection class fully sealed structure, comprising a cabinet (100), characterized in that: The cabinet body (100) is internally provided with a flow guide mechanism (200), and the flow guide mechanism (200) comprises: A flow guide top plate (201) is fixed to the inner top of the cabinet body (100), and the bottom of the flow guide top plate (201) is a hollow V-shaped structure for directional flow guide condensation; Two vertical flow guide plates (202) are symmetrically installed on the two sides below the flow guide top plate (201), and the two vertical flow guide plates (202) are provided with flow guide grooves (2021) for guiding condensation on the sides facing the cabinet body (100); A horizontal flow guide plate (203) is a hollow structure arranged below the vertical flow guide plate (202), and the hollow structure is internally provided with a drying agent, and the horizontal flow guide plate (203) is provided with an exhaust fan (204) penetrating through the hollow structure and the middle part of the cabinet body (100) at the top of the inner cavity; wherein: The flow guide top plate (201), the vertical flow guide plate (202), the horizontal flow guide plate (203) and the exhaust fan (204) and the inner wall of the cabinet body (100) form an isolated chamber; Both sides of the horizontal flow guide plate (203) are provided with air inlets corresponding to the flow guide grooves (2021), and the inner bottom wall of the horizontal flow guide plate (203) is provided with a fixing box (205); The fixing box (205) is used for placing the drying agent, and both sides of the exhaust fan (204) are provided with two guide plates (206); The two guide plates (206) are connected with the inner side wall of the exhaust fan (204), and the side close to the exhaust fan (204) of the two guide plates (206) is inclined. The fixing box (205) is located below the exhaust fan (204), and both sides of the fixing box (205) are provided with grooves for gas flow.

2. The gas insulated switchgear having an IP67 protection class full-sealed structure according to claim 1, characterized in that: The front and back of the flow guide top plate (201) are fixedly connected with V-shaped baffles (2011), and a plurality of discharge holes for discharging condensation are equidistantly arranged on the inclined slopes formed on the two sides of the flow guide top plate (201).

3. The gas insulated switchgear having an IP67 protection class full-sealed structure according to claim 1, characterized in that: The material of the flow guide top plate (201) is an anodized aluminum alloy for rapid heat dissipation.

4. The gas insulated switchgear having an IP67 protection class full-sealed structure according to claim 1, characterized in that: The flow guide grooves (2021) on the two vertical flow guide plates (202) correspond to the discharge holes on the flow guide top plate (201) one by one, and the material of the two vertical flow guide plates (202) is stainless steel.

5. The gas insulated switchgear having an IP67 protection class full-sealed structure according to claim 1, characterized in that: The flow guide grooves (2021) are provided with a nano hydrophilic coating for inducing water film rapid formation.

6. The gas insulated switchgear with IP67 protection class full sealing structure according to claim 1, characterized in that: The front of the cabinet body (100) is provided with a sealing door (101) for sealing, so as to reduce the dust, moisture and pollutants in the external environment from entering the inside of the cabinet body (100).

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