20kV all-insulation intelligent ring main unit anti-condensation dehumidification device and control method thereof

Abstract

The invention relates to the related technical field of intelligent ring main units, in particular to a 20 kV all-insulation intelligent ring main unit anti-condensation and dehumidification device and a control method thereof.The 20 kV all-insulation intelligent ring main unit anti-condensation and dehumidification device is arranged in a cabinet body, and an exhaust port and an air inlet are formed in the side portion and the top of the cabinet body respectively; a switching mechanism and a filter are respectively arranged in the exhaust port and the air inlet; an electric push rod is installed in the cabinet body, a vertical rod is fixed to the movable end of the electric push rod, and the electric push rod and a moisture removal mechanism connected with the switching mechanism communicate with a humidity sensor arranged in the cabinet body; when the humidity in the cabinet body exceeds a preset threshold value, the electric push rod works to enable the exhaust port to be communicated, the filter to be opened and the filter to be arranged, it is guaranteed that fresh air introduced into the cabinet body meets the cleaning requirement, the trigger mechanism is arranged, and before the filter is opened, the trigger mechanism can blow out air in the cylinder to the outside of the cabinet body through the filter, so that the fresh air is purified. And impurities and foreign matters possibly existing in the filter can be blown away.

Description

Technical Field

[0001] The present invention relates to the technical field related to intelligent ring main unit (RMU), and in particular to a 20kV fully insulated intelligent ring main unit (RMU) anti-condensation and dehumidification device and a control method thereof. Background Art

[0002] Ring main units (RMUs) are electrical equipment used in medium-voltage power distribution networks, primarily for power distribution and control. Their modular design ensures reliable power distribution and fault protection, making them widely used in urban power distribution networks, industrial areas, residential areas, and other locations. RMUs are typically installed outdoors, particularly in high-humidity areas or outdoors. Moisture vapor can easily enter the RMU through poorly sealed gaps, increasing internal humidity and potentially causing condensation. This accumulated moisture can degrade the insulation performance of components within the RMU, increasing the risk of short circuits and failures.

[0003] To this end, some ring network cabinets are equipped with dehumidification devices to discharge the humid air in the cabinet and introduce fresh air. In order to prevent the impurities and dust in the introduced fresh air from adversely affecting the components in the cabinet, a filter is installed at the fresh air inlet. However, since the ring network cabinet is usually installed in an outdoor open-air environment, over time, on the one hand, impurities filtered out during dehumidification will remain in the filter, and on the other hand, impurities and even foreign matter in the outside air may enter the filter. As a result, during dehumidification, the filter is prone to clogging, making the introduction of fresh air difficult. Although the filter element itself in the filter will hinder air flow, if the filter element is severely clogged, the suction effect of the dehumidification fan may cause negative pressure to form in the cabinet, and air may enter the cabinet through other unfiltered paths (such as through gaps in the cabinet or unsealed areas), thereby carrying dust. Dust and impurities; therefore, some dehumidification devices will be equipped with corresponding mechanisms, which will blow away impurities and foreign objects that may exist in the filter and cause problems in the subsequent dehumidification process before the introduction of fresh air. Specifically, an air pump is equipped to blow away dust and foreign objects in the filter before dehumidification. However, if the gas source of the air pump is external gas, the filter will be contaminated, achieving the opposite purification effect, or it may be the gas in the ring network cabinet. However, when the humidity of the gas in the ring network cabinet is high, it is easy to cause the components in the filter to be wetted, which will not only make it difficult to discharge impurities and dust, but also increase the adhesion of impurities and dust. If a special gas storage tank is equipped, it will occupy the internal space of the ring network cabinet, and in order to avoid the exhaustion of gas in the storage tank, regular inspection is required, which increases the workload of maintenance work.

[0004] To this end, some dehumidifiers are equipped with a cylindrical structure, which uses a piston pump to blow the previously introduced fresh air in the opposite direction of the fresh air introduction path. To ensure the blowing effect, the piston needs to have a faster movement speed. However, due to the limited movement stroke of the piston, its movement time is short, and then it enters the dehumidification process, that is, the fresh air introduction path is connected. At this time, the dust diffused above the filter 2 has not yet completely dispersed. Therefore, a considerable part of the dust will be carried back into the filter by the fresh air, resulting in poor blowing effect and adverse effects on the dehumidification process. Summary of the Invention

[0005] The object of the present invention is to provide a 20kV fully insulated intelligent ring main unit anti-condensation dehumidification device and a control method thereof, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a 20kV fully insulated intelligent ring network cabinet anti-condensation and dehumidification device is arranged in a cabinet body, and the side and top of the cabinet body are respectively provided with an exhaust port and an air inlet; wherein, the exhaust port and the air inlet are respectively provided with a switching mechanism and a filter; an electric push rod is installed in the cabinet body, and a vertical pole is fixed to the movable end of the electric push rod, and the electric push rod and the dehumidification mechanism connected to the switching mechanism communicate with a humidity sensor arranged in the cabinet body; when the humidity in the cabinet body exceeds a preset threshold value, the electric push rod works, prompting the switching mechanism to connect the exhaust port, and the filter is opened to form a gas flow path in the cabinet body, and a cylinder is also fixed in the cabinet body. Before the filter is opened, the trigger mechanism arranged in the cabinet body can blow the gas in the cylinder to the outside of the cabinet body through the filter.

[0007] As a further solution of the present invention: the switching mechanism includes a first disk body fixed in the exhaust port and a second disk body rotatably connected to the first disk body through an axle pin, the first disk body and the second disk body are sealed and slidably fitted, and both are provided with multiple openings equidistant along the circumference, and the electric push rod can drive the second disk body to rotate relative to the first disk body through a sliding fitting structure so that the openings on the first disk body and the second disk body overlap or stagger.

[0008] As a further solution of the present invention: the sliding fitting structure includes a fixed column fixed to the movable end of the electric push rod and a support arm fixed to the edge of the second disk body, and the support arm is provided with a strip-shaped through groove adapted to the fixed column, and the fixed column passes through the strip-shaped through groove and is slidably connected to the support arm.

[0009] As a further solution of the present invention: the dehumidification mechanism includes a pipe fixedly installed in the cabinet and an exhaust fan fixedly connected to the pipe, a cover is fixed on one end of the exhaust fan away from the pipe, and the cover is sealed and rotatably connected to the second disk.

[0010] As a further solution of the present invention: the cylinder is located below the filter, and a telescopic structure is provided between the two. The telescopic structure cooperates with the vertical rod, and in the latter part of the vertical rod's rising stroke, the telescopic structure can be prompted to perform a shortening action.

[0011] As a further solution of the present invention: the telescopic structure includes a bellows connected to the filter and a cover body fixed to the end of the bellows away from the filter, the cover body is fixedly connected to a follower column, and the vertical rod can push the cover body to separate from the cylinder through the follower column and cause the bellows to contract.

[0012] As a further solution of the present invention: a rotating shaft is rotatably installed on the inner wall of the cabinet, and the trigger mechanism includes a piston sealed and slidably arranged in the cylinder and a follower arm fixed at the head end of the rotating shaft, and a transmission arm is provided between the follower arm and the piston; wherein, the two ends of the transmission arm are respectively hinged to the piston and the follower arm, and the follower arm is also connected to an elastic structure that cooperates with the vertical rod.

[0013] As a further solution of the present invention: the elastic structure includes a guide cylinder fixed to the tail end of the rotating shaft and a telescopic rod slidingly fitted with the guide cylinder, and a spring is also provided inside the guide cylinder, and one end of the spring is connected to the inner wall of the guide cylinder; wherein, the other end of the spring is connected to the head end of the telescopic rod, and the tail end of the telescopic rod is also provided with a pulley, and an "L"-shaped track is fixedly provided in the cabinet body, and the pulley abuts against the track.

[0014] As a further solution of the present invention: a second convex column and a first convex column distributed vertically are fixed on the vertical pole, and the guide cylinder is located between the first convex column and the second convex column.

[0015] A control method for the 20kV fully insulated intelligent ring main unit anti-condensation and dehumidification device comprises the following steps: Step 1: The humidity sensor monitors the air humidity in the cabinet; Step 2: When the humidity is detected to be above the preset threshold, the electric push rod starts working; Step 3: The trigger mechanism moves, blowing the gas in the cylinder out of the cabinet through the filter; Step 4: The exhaust port and the filter are opened, the dehumidification mechanism works, the humid air in the cabinet is drawn out of the cabinet through the exhaust port, and fresh air is introduced into the cabinet through the filter.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the present application sets a humidity sensor in the cabinet to monitor the humidity conditions in the cabinet in real time. When the humidity in the cabinet exceeds a preset threshold, the exhaust port and the filter can be automatically opened through the movement of the electric push rod, thereby realizing intelligent control; the filter is set to ensure that the fresh air introduced into the cabinet meets the cleanliness requirements, and wherein a trigger mechanism is set. Before the filter is opened, the trigger mechanism can blow the gas in the cylinder through the filter to the outside of the cabinet, which can blow out impurities and foreign matter that may exist in the filter, and avoid clogging of the filter by foreign matter during subsequent dehumidification, making it difficult for fresh air to be introduced into the cabinet through the filter, thereby causing negative pressure to be formed in the cabinet, forcing air to enter the cabinet through other unfiltered paths, thereby carrying dust and impurities, affecting the working performance of the ring network cabinet; in addition, during the downward movement of the vertical pole, the separation process of the vertical pole and the follower column occurs before the second convex column contacts the guide cylinder. Therefore, before the piston resets, the bellows will complete the elastic extension, that is, the cover body and the top of the cylinder are separated. The end returns to the sealed docking state, and when the subsequent piston moves downward to reset, part of the fresh air can be extracted into the cylinder, realizing automatic storage of gas and ensuring that the gas source used for blowing out impurities and foreign matter meets the requirements. The gas reserve is automatically carried out after the dehumidification is completed, and there is no need to set up an additional storage tank to store the gas source that meets the requirements, thereby effectively reducing the workload of maintenance work; the present application sets the trigger mechanism, and during the rising process of the vertical pole, the guide cylinder and the telescopic rod begin to deflect upward until the two are perpendicular to the track. The piston slides slowly in the cylinder. After the guide cylinder and the telescopic rod pass the position perpendicular to the track, the piston can move up quickly in the guide cylinder due to the rapid instantaneous rebound of the spring, thereby realizing the "slow first and fast later" feature of the blowing process; the present invention adopts the idea of ​​blowing slowly first and fast later, which provides a longer diffusion time for the dispersion of dust with less adhesion, allowing the dust to be fully dispersed above the filter as much as possible, weakening the influence of the fresh air flow on it during the dehumidification process, and preventing more dust from re-entering the filter 2, resulting in poor blowing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of an embodiment of a 20kV fully insulated intelligent ring main unit anti-condensation and dehumidification device; Figure 2 This is a structural schematic diagram of another angle of an embodiment of a 20kV fully insulated intelligent ring main unit anti-condensation and dehumidification device; Figure 3 This is a schematic diagram of the internal structure of a cabinet in one embodiment of a 20kV fully insulated intelligent ring main unit anti-condensation and dehumidification device; Figure 4 This is a structural schematic diagram of another angle inside the cabinet of one embodiment of a 20kV fully insulated intelligent ring main unit anti-condensation and dehumidification device; Figure 5 This is a structural diagram of another angle inside the cabinet of one embodiment of a 20kV fully insulated intelligent ring main unit anti-condensation and dehumidification device; Figure 6 for Figure 4 A magnified view of the structure at point A; Figure 7 for Figure 4 A magnified view of the structure at B in the middle; Figure 8 This is an exploded diagram of the structure of the switching mechanism in one embodiment of a 20kV fully insulated intelligent ring main unit anti-condensation and dehumidification device; Figure 9 for Figure 8 Schematic diagram of the structure from another angle; Figure 10 This is an exploded diagram of the structure of the trigger mechanism in one embodiment of a 20kV fully insulated intelligent ring main unit anti-condensation and dehumidification device.

[0018] In the figure: 1. cabinet; 2. filter; 3. axle pin; 4. first disk; 5. second disk; 501. support arm; 6. track; 7. cover; 8. exhaust fan; 9. duct; 10. bellows; 11. cover; 1101. follower column; 12. cylinder; 13. piston; 14. transmission arm; 15. follower arm; 16. guide cylinder; 17. telescopic rod; 18. spring; 19. electric push rod; 1901. fixed column; 20. vertical pole; 2001. first protruding column; 2002. second protruding column; 21. rotating shaft. DETAILED DESCRIPTION

[0019] 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 creative efforts are within the scope of protection of the present invention.

[0020] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0021] See also Figures 1-10In an embodiment of the present invention, a 20kV fully insulated intelligent ring network cabinet anti-condensation and dehumidification device is arranged in a cabinet 1, and an exhaust port and an air inlet are respectively provided on the side and the top of the cabinet 1; wherein, a switching mechanism and a filter 2 are respectively provided in the exhaust port and the air inlet; an electric push rod 19 is installed in the cabinet 1, and a vertical pole 20 is fixed to the movable end of the electric push rod 19, and the electric push rod 19 and the dehumidification mechanism connected to the switching mechanism communicate with the humidity sensor arranged in the cabinet 1; when the humidity in the cabinet 1 exceeds a preset threshold value, the electric push rod 19 is operated to prompt the switching mechanism to connect the exhaust port, and the filter 2 is opened to form a gas flow path in the cabinet 1, and a cylinder 12 is also fixed in the cabinet 1. Before the filter 2 is opened, the trigger mechanism arranged in the cabinet 1 can blow the gas in the cylinder 12 to the outside of the cabinet 1 through the filter 2.

[0022] Furthermore, during the daily operation of the ring network cabinet, the humidity sensor inside it will monitor the internal humidity in real time. The staff will set a humidity threshold according to the performance of the ring network cabinet itself. When the humidity in the cabinet body 1 exceeds the threshold, it indicates that condensation is likely to occur in the cabinet body 1, which is not conducive to the normal operation of the internal electrical components. Therefore, the wet air needs to be removed in time. In this regard, the humidity sensor will send a control signal to make the electric push rod 19 and the dehumidification mechanism work in sequence. The electric push rod 19 will drive the vertical rod 20 to rise. During this process, the vertical rod 20 will first prompt the trigger mechanism to move, and the trigger mechanism Air will be ventilated into the filter 2 and the gas will be discharged to the outside of the cabinet 1, avoiding the presence of foreign matter in the filter 2, which may cause the filter 2 to be blocked during subsequent exhaust. Therefore, before each moisture removal, the trigger mechanism can first prevent the filter 2 from being blocked, avoiding serious blockage of the filter 2, and preventing the air from entering the cabinet through other unfiltered paths, such as through the gaps in the cabinet 1, which will have an adverse effect on the ring network cabinet. In addition, when the filter 2 is seriously blocked, the dehumidification mechanism may cause negative pressure to form in the cabinet 1, and this negative pressure will force the air to enter the cabinet through other unfiltered paths, thereby carrying dust and impurities.

[0023] After the trigger mechanism finishes working, the switching mechanism switches the blocking state of the exhaust port to the conducting state, and the vertical rod 20 opens the filter 2. Then, the dehumidification mechanism works, so that the humid air in the cabinet 1 is discharged through the exhaust port, and the fresh air is introduced into the cabinet 1 through the filter 2, thereby realizing automatic adjustment of the humidity conditions in the cabinet 1 and providing guarantee for the normal operation of the ring network cabinet; it should be noted that, in actual applications, the cabinet 1 should also be equipped with a temperature sensor for real-time monitoring of the temperature conditions in the cabinet 1. Similarly, a temperature threshold is set to timely discharge the hot air in the cabinet 1 and introduce fresh air to achieve a heat dissipation effect, so as to avoid the internal temperature of the ring network cabinet being too high and causing adverse effects on the working performance.

[0024] It's important to note that to avoid high humidity in the ring main unit's environment, fresh air must be dried before being introduced into cabinet 1 to ensure that the humidity of the fresh air entering cabinet 1 meets the required level. To this end, a desiccant is installed within filter 2. As the fresh air passes through filter 2, it first passes through the internal filter screen, which effectively removes dust and impurities carried by the fresh air, preventing these particles from entering cabinet 1 and potentially damaging electrical components or affecting the normal operation of equipment.

[0025] After filtration, the fresh air continues to flow through the desiccant. The main function of the desiccant is to absorb moisture from the fresh air, separating it from the air through physical or chemical adsorption. Desiccant typically has a porous structure, which significantly increases its adsorption area, thereby efficiently removing moisture from the air. This process not only reduces the humidity of the fresh air but also ensures that the fresh air entering cabinet 1 is dry and clean, providing a stable operating environment for the electrical components within cabinet 1.

[0026] Furthermore, to prevent the incoming fresh air from being too hot and adversely affecting the operation of equipment within cabinet 1, a cooling mechanism can be installed within cabinet 1. The cooling mechanism regulates the temperature of the fresh air entering cabinet 1, keeping it within a suitable temperature range. This mechanism typically utilizes a heat exchange mechanism, lowering the fresh air temperature by exchanging heat with a cooling medium. This design not only prevents damage to equipment caused by high temperatures but also further optimizes the temperature and humidity environment within cabinet 1, ensuring optimal equipment operation.

[0027] Through the filtration and drying process of filter 2, as well as the temperature regulation of the cooling mechanism, the ring main unit can effectively cope with high humidity and high temperature environments, ensuring the quality of fresh air and the stable operation of the equipment inside the unit. These designs not only improve the reliability of the equipment but also extend its service life, ensuring the long-term use of the ring main unit in complex environments.

[0028] Please refer again Figure 2 、 Figure 5 as well as Figure 9 The switching mechanism includes a first disk body 4 fixed in the exhaust port and a second disk body 5 rotatably connected to the first disk body 4 through an axle pin 3. The first disk body 4 and the second disk body 5 are sealed and slidably fitted, and both are provided with multiple openings equidistant along the circumference. The electric push rod 19 can drive the second disk body 5 to rotate relative to the first disk body 4 through a sliding fit structure, so that the openings on the first disk body 4 and the second disk body 5 coincide or stagger.

[0029] Please refer again Figure 6 and Figure 9 The sliding fitting structure includes a fixed column 1901 fixed to the movable end of the electric push rod 19 and a support arm 501 fixed to the edge of the second disk body 5. The support arm 501 is provided with a strip-shaped through groove adapted to the fixed column 1901. The fixed column 1901 passes through the strip-shaped through groove and is slidably connected to the support arm 501 when the movable end of the electric push rod 19 moves.

[0030] Specifically, when the humidity sensor in the cabinet 1 detects that the humidity in the cabinet 1 exceeds a preset threshold, the temperature sensor will send a control signal to the electric push rod 19, and the electric push rod 19 will perform an extension action, and then the fixed column 1901 will rise vertically. During this process, the fixed column 1901 slides with the support arm 501 through the bar-shaped through groove on the support arm 501, causing the support arm 501 to deflect. Correspondingly, the second disk 5 will rotate relative to the first disk 4. After the movement of the electric push rod 19 is completed, the openings on the second disk 5 and the first disk 4 are converted from an offset state to an overlapping state. Therefore, when the exhaust port is connected and the dehumidification mechanism is working, the humid air in the cabinet 1 can be pumped to the outside of the cabinet 1 through the opening, thereby realizing the intelligent dehumidification function and avoiding condensation caused by excessive humidity in the cabinet 1 and affecting the normal operation of the ring network cabinet.

[0031] Please refer again Figure 5 、 Figure 8 as well as Figure 9 The dehumidification mechanism includes a pipe 9 fixedly installed in the cabinet 1 and an exhaust fan 8 fixedly connected to the pipe 9. A cover 7 is fixed to one end of the exhaust fan 8 away from the pipe 9, and the cover 7 is sealed and rotatably connected to the second disk 5.

[0032] Specifically, the exhaust fan 8 includes a mounting frame, fan blades rotatably mounted in the mounting frame, and a driving motor fixed in the mounting frame with an output end connected to the fan blade rotating shaft. The pipe 9 and the cover body 7 are fixed to the mounting frame.

[0033] When the exhaust port and the air inlet are both connected, the exhaust fan 8 begins to operate. The exhaust fan 8 draws the moist air from the cabinet 1 through the duct 9. The moist air is first directed into the duct 9 and flows along the path of the duct 9. The moist air is then discharged outside the cabinet 1 through the cover 7 and the openings in the second and first trays 5 and 4, thus achieving a dehumidification function.

[0034] During this process, it's important to note that to prevent moist air from entering the exhaust fan 8's drive motor through duct 9 during the dehumidification process, potentially impacting its operation, appropriate protective measures have been implemented. Specifically, a protective housing (not numbered in the figure) is installed on the exhaust fan 8's mounting frame. This housing effectively blocks moist air from entering the drive motor's interior, ensuring stable operation during the dehumidification process and preventing short circuits, corrosion, and other potential mechanical failures caused by moisture intrusion. This design not only improves equipment reliability but also extends the service life of the exhaust fan 8, ensuring the ring main unit can continue to effectively dehumidify over the long term.

[0035] Please refer again Figure 7 The cylinder 12 is located below the filter 2, with a telescopic structure disposed therebetween. The telescopic structure cooperates with the upright 20, causing the telescopic structure to contract during the latter portion of the upright 20's upward movement. The telescopic structure comprises a bellows 10 connected to the filter 2 and a cover 11 secured to the end of the bellows 10 away from the filter 2. A follower post 1101 is fixedly attached to the cover 11. The upright 20 can use the follower post 1101 to push the cover 11 away from the cylinder 12, causing the bellows 10 to contract.

[0036] Further, with the Figure 7Taking the state shown as an example, at this time, the vertical rod 20 and the follower column 1101 are in a separated state. Under the action of the gravity of each component and the elastic force of the bellows 10 (similar to a spring), the cover body 11 is sealed and abutted against the upper end of the cylinder 12, and the openings on the first disk body 4 and the second disk body 5 are in a staggered state; in the process of the electric push rod 19 driving the vertical rod 20 to rise, before the vertical rod 20 contacts the follower column 1101, the vertical rod 20 prompts the trigger mechanism to move, and the trigger mechanism can lift the gas in the cylinder 12 upward, so that the gas in the cylinder 12 is discharged to the outside of the cabinet 1 through the filter 2, which can blow away any foreign matter that may be present in the filter 2, thereby avoiding subsequent discharge When it is wet, foreign matter will clog the filter 2, making it difficult for fresh air to be introduced into the cabinet 1 through the filter 2, thereby causing negative pressure to form in the cabinet 1. This negative pressure forces the air to enter the cabinet through other unfiltered paths, thereby carrying dust and impurities, affecting the working performance of the ring network cabinet; after the vertical rod 20 contacts the follower column 1101, the vertical rod 20 will apply a pushing force to the follower column 1101 and the cover body 11, so that the cover body 11 is separated from the cylinder 12, the bellows 10 contracts, and fresh air can be smoothly introduced into the cabinet 1. After the vertical rod 20 stops rising, the openings on the first disk 4 and the second disk 5 are in an overlapping state, and an effective gas flow path is formed in the cabinet 1, so that fresh air can be introduced while dehumidifying.

[0037] Please refer again Figure 7 and Figure 10 A rotating shaft 21 is rotatably mounted on the inner wall of the cabinet 1. The trigger mechanism includes a piston 13 sealingly and slidingly arranged in the cylinder 12 and a follower arm 15 fixed at the head end of the rotating shaft 21. A transmission arm 14 is provided between the follower arm 15 and the piston 13; wherein, the two ends of the transmission arm 14 are respectively hinged to the piston 13 and the follower arm 15, and the follower arm 15 is also connected to an elastic structure that cooperates with the vertical rod 20.

[0038] The elastic structure includes a guide cylinder 16 fixed to the rear end of the rotating shaft 21 and a telescopic rod 17 that slidably engages with the guide cylinder 16. A spring 18 is also provided within the guide cylinder 16, one end of which is connected to the inner wall of the guide cylinder 16. The other end of the spring 18 is connected to the front end of the telescopic rod 17. A pulley is also provided at the rear end of the telescopic rod 17. An L-shaped track 6 is fixedly provided within the cabinet 1, and the pulley abuts against the track 6. A second boss 2002 and a first boss 2001 are fixed to the vertical rod 20, with the guide cylinder 16 located between the first boss 2001 and the second boss 2002.

[0039] When the electric push rod 19 drives the vertical rod 20 to rise, the first boss 2001 and the second boss 2002 rise together with the vertical rod 20. First, the first boss 2001 will gradually approach the guide cylinder 16. After the first boss 2001 contacts the guide cylinder 16, it will push the guide cylinder 16 to deflect upward. In the process of the guide cylinder 16 deflecting to the horizontal position, under the limiting action of the track 6 (that is, the process of the guide cylinder 16 and the telescopic rod 17 gradually becoming perpendicular to the track 6), the telescopic rod 17 gradually slides toward the inside of the guide cylinder 16, and the compression amount of the spring 18 increases. After the guide cylinder 16 passes the horizontal position, the spring 18 rebounds, and the pulley rolls rapidly upward along the track 6. Accordingly, the guide cylinder 16 drives the follower arm 15 to deflect rapidly upward, and the follower arm 1 The piston 13 is driven to rise rapidly in the cylinder 12 via the transmission arm 14. It should be noted that during the above process, the vertical rod 20 and the follower column 1101 have not yet come into contact. Therefore, the cover 11 and the upper end of the cylinder 12 are in a sealed butt joint state. The instantaneous rebound of the spring 18 allows the rapidly rising piston 13 to promote a faster airflow, thereby removing dust and foreign matter from the filter 2 and avoiding the problem of poor dehumidification caused by clogging of the filter 2 during subsequent dehumidification. After the dehumidification process is completed, the electric push rod 19 drives the vertical rod 20 downward until all components are reset. During this process, the second protrusion 2002 pushes the guide cylinder 16 to deflect downward, causing the spring 18 to be compressed. After the guide cylinder 16 passes the horizontal position, the "L"-shaped track 6 limits the pulley.

[0040] Of course, some existing devices are also equipped with corresponding air pumps to remove dust and foreign matter in the filter 2 before dehumidification. However, if the gas source of the air pump is external gas, the filter 2 will be contaminated, achieving the opposite purification effect, or it may be the gas in the cabinet 1. However, the gas humidity in the cabinet 1 is relatively high, which can easily cause the components in the filter 2 to be moistened, making it not only difficult to discharge impurities and dust, but also increasing the adhesion of impurities and dust. In this regard, by setting a trigger mechanism, during the downward movement of the vertical rod 20, the separation process of the vertical rod 20 and the follower column 1101 occurs before the second protrusion 2002 contacts the guide cylinder 16. Therefore, before the piston 13 is reset, the bellows 10 will complete the elastic extension, that is, the cover body 11 and the top of the cylinder 12 will return to the sealed docking state. When the piston 13 moves downward and resets, part of the fresh air can be drawn into the cylinder 12, realizing automatic storage of gas and ensuring that the gas source meets the requirements.

[0041] It should be emphasized that if the setting of the trigger mechanism is cancelled and the piston 13 is fixedly connected to the vertical rod 20, in order to ensure that the dust and foreign matter in the filter 2 are effectively blown away, the movement of the piston 13 inside the cylinder 12 needs to have a sufficient speed. Correspondingly, the movement speed of the vertical rod 20 is relatively large, which will cause the relative rotation speed between the first disk body 4 and the second disk body 5 to be faster, thereby increasing the wear between the first disk body 4 and the second disk body 5, affecting the sealing performance between the two, and causing subsequent external moisture to invade the cabinet; for this reason, the present application sets the trigger mechanism, and during the rising process of the vertical rod 20, the guide cylinder 16 and the telescopic rod 17 begin to swing upward until the two are perpendicular to the track 6, and the piston 13 slides slowly in the cylinder 12, and waits until the guide cylinder 16 and the telescopic rod 17 pass over After reaching a position perpendicular to the track 6, the piston 13 can move up quickly in the guide cylinder 16 through the rapid instantaneous rebound of the spring 18, thus realizing the characteristic of "slow first and fast later" in the blowing process; during the blowing process, since the size of the cylinder 12 is constant, if high-speed airflow blowing is adopted throughout the process, the movement time of the piston 13 in the cylinder 12 will be shorter, and then dehumidification will be carried out. When fresh air enters, the dust dispersed above the filter 2 has not yet completely dispersed, so a considerable part of the dust will be carried back to the filter 2 by the fresh air; the present invention adopts the idea of ​​blowing slowly first and then quickly, which provides a longer diffusion time for the dispersion of dust with less adhesion, allowing the dust to be fully dispersed above the filter 2 as much as possible, weakening the influence of the fresh air flow on it during the dehumidification process, and preventing more dust from re-entering the filter 2, resulting in poor blowing effect.

[0042] Specifically, when blowing off the filter 2, an ingenious blowing mode of "slow first, then fast" is adopted. This process covers two key stages: slow and fast. In the initial slow stage, the dust with relatively low adhesion in the filter 2 can be accurately blown up, giving it ample time to diffuse and dissipate outward. This design is intended to avoid the disadvantages of using high-speed airflow for blowing throughout the process, because if high-speed airflow is used all the time, the dust may spread over a larger area after being blown out. When fresh air is introduced next time, the dust still floating in the air can easily be brought into the filter 2 again, causing secondary clogging problems. When the blowing operation enters the fast stage, stubborn dust with strong adhesion can be effectively removed.

[0043] In addition, under the action of the slow airflow, the dust particles can be gradually loosened. This process is like a preliminary cleaning treatment for the filter 2, creating more favorable conditions for the subsequent deep cleaning work of the high-speed airflow, making the cleaning process smoother and more efficient; of course, if you want to achieve the sophisticated blowing method of "slow first and then fast", a feasible solution is to add a movable end electric push rod fixedly connected to the piston disc 13 in the cabinet, and use the electric push rod to control the driving speed, thereby achieving the ideal blowing effect of "slow first and then fast". However, this driving mode is highly dependent on a precise and strict logic control system; and, the original electric push rod 19 in the cabinet and the newly added electric push rod must establish a strict and orderly working timing relationship during the working process; in this application, the vertical rod 20 can move at a slow and stable speed to avoid wear of the first disk 4 and the second disk 5 due to excessive movement speed, thereby affecting the sealing performance and shortening the service life of the seal due to rapid movement. On this basis, the slow and steady movement of the vertical rod 20 can prompt the piston 13 to move slowly and then quickly in the cylinder 12, achieving the ideal blowing effect of "slow first and then fast".

[0044] As another embodiment of the present invention, a control method for the 20kV fully insulated intelligent ring main unit anti-condensation dehumidification device is also proposed, comprising the following steps: Step 1: The humidity sensor monitors the air humidity in the cabinet 1; Step 2: When the humidity is detected to be above a preset threshold, the electric push rod 19 starts working; Step 3: The trigger mechanism moves to blow the gas in the cylinder 12 out of the cabinet 1 through the filter 2; Step 4: The exhaust port and the filter 2 are opened, the dehumidification mechanism works, the humid air in the cabinet 1 is drawn out of the cabinet 1 through the exhaust port, and the fresh air is introduced into the cabinet 1 through the filter 2.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0046] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A 20kV fully insulated intelligent ring main unit anti-condensation and dehumidification device, which is installed in the cabinet, and the side and top of the cabinet are respectively provided with an exhaust port and an air inlet; characterized in that: A switching mechanism and a filter are respectively provided in the exhaust port and the air inlet; an electric push rod is installed in the cabinet, and a vertical pole is fixed to the movable end of the electric push rod; the electric push rod and the dehumidification mechanism connected to the switching mechanism communicate with the humidity sensor provided in the cabinet; when the humidity in the cabinet exceeds a preset threshold, the electric push rod works, prompting the switching mechanism to open the exhaust port, and the filter opens, so that a gas flow path is formed in the cabinet, and a cylinder is also fixed in the cabinet. Before the filter is opened, a trigger mechanism provided in the cabinet can blow the gas in the cylinder to the outside of the cabinet through the filter.

2. A 20kV fully insulated intelligent ring main unit anti-condensation and dehumidification device according to claim 1, characterized in that: The switching mechanism includes a first disk body fixed in the exhaust port and a second disk body rotatably connected to the first disk body by an axle pin. The first disk body and the second disk body are sealed and slidably fitted together, and both are provided with multiple openings equidistantly along the circumference. The electric push rod can drive the second disk body to rotate relative to the first disk body through a sliding fit structure so that the openings on the first disk body and the second disk body overlap or stagger.

3. A 20kV fully insulated intelligent ring main unit anti-condensation and dehumidification device according to claim 2, characterized in that: The sliding fitting structure includes a fixed column fixed to the movable end of the electric push rod and a support arm fixed to the edge of the second disk body. The support arm is provided with a strip-shaped through groove adapted to the fixed column. The fixed column passes through the strip-shaped through groove and is slidably connected to the support arm.

4. A 20kV fully insulated intelligent ring main unit anti-condensation and dehumidification device according to claim 2, characterized in that: The dehumidification mechanism includes a pipe fixedly installed in the cabinet and an exhaust fan fixedly connected to the pipe. A cover is fixed to one end of the exhaust fan away from the pipe, and the cover is sealed and rotatably connected to the second disk.

5. The 20kV fully insulated intelligent ring main unit anti-condensation and dehumidification device according to claim 1, characterized in that: The cylinder is located below the filter, and a telescopic structure is provided between the two. The telescopic structure cooperates with the vertical rod, and in the latter part of the vertical rod's rising stroke, the telescopic structure can be prompted to perform a shortening action.

6. A 20kV fully insulated intelligent ring main unit anti-condensation and dehumidification device according to claim 5, characterized in that: The telescopic structure includes a bellows connected to the filter and a cover fixed to one end of the bellows away from the filter. The cover is fixedly connected to a follower column. The vertical rod can push the cover to separate from the cylinder through the follower column and cause the bellows to contract.

7. The 20kV fully insulated intelligent ring main unit anti-condensation and dehumidification device according to claim 1, characterized in that: A rotating shaft is rotatably installed on the inner wall of the cabinet, and the trigger mechanism includes a piston sealed and slidably arranged in the cylinder and a follower arm fixed at the head end of the rotating shaft, and a transmission arm is provided between the follower arm and the piston; wherein, the two ends of the transmission arm are respectively hinged to the piston and the follower arm, and the follower arm is also connected to an elastic structure that cooperates with the vertical rod.

8. A 20kV fully insulated intelligent ring main unit anti-condensation and dehumidification device according to claim 7, characterized in that: The elastic structure includes a guide cylinder fixed to the tail end of the rotating shaft and a telescopic rod slidingly fitted with the guide cylinder. A spring is also provided inside the guide cylinder, and one end of the spring is connected to the inner wall of the guide cylinder; wherein, the other end of the spring is connected to the head end of the telescopic rod, and a pulley is also provided at the tail end of the telescopic rod, and a track in an "L" shape is fixedly provided in the cabinet body, and the pulley abuts against the track.

9. A 20kV fully insulated intelligent ring main unit anti-condensation and dehumidification device according to claim 8, characterized in that: A second convex column and a first convex column are fixed on the vertically distributed vertically, and the guide cylinder is located between the first convex column and the second convex column.

10. A control method for the 20kV fully insulated intelligent ring main unit anti-condensation and dehumidification device according to claim 1, characterized in that: The following steps are involved: Step 1: The humidity sensor monitors the air humidity in the cabinet; Step 2: When the humidity is detected to be above the preset threshold, the electric push rod starts working; Step 3: The trigger mechanism moves, blowing the gas in the cylinder out of the cabinet through the filter; Step 4: The exhaust port and the filter are opened, the dehumidification mechanism works, the humid air in the cabinet is drawn out of the cabinet through the exhaust port, and fresh air is introduced into the cabinet through the filter.

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