A main transformer oil pillow desiccant sealing switching device and control method

Abstract

The present application relates to the technical field of power transformer operation and maintenance equipment, and particularly relates to a main transformer oil pillow desiccant sealing switching device and a control method, which comprises a mounting shell, a rotary switching assembly, a dust and condensation prevention assembly, a solar energy supply assembly, a controller, a position detection device and a visual observation window; the rotary switching assembly realizes switching of one desiccant in use and one desiccant in standby; the dust and condensation prevention assembly constructs a positive air circuit circulation, and is matched with an oil filter core, an activated carbon filter core and a filter screen for multi-stage filtration to complete dehumidification, oil removal and dust removal; the control method comprises equipment initialization calibration, normal sealing ventilation dehumidification, working condition real-time monitoring, desiccant switching, switching alignment verification and offline replacement and maintenance, can independently supply power and adaptively adjust the ventilation rate according to the humidity; the present application solves the problems of traditional desiccant manual replacement, poor sealing, low dehumidification efficiency and easy blockage, realizes switching, positive circulation dehumidification and sealing protection, and improves the operation safety and service life of the main transformer.

Description

Technical Field

[0001] This invention relates to the field of power transformer operation and maintenance equipment technology, and in particular to a main transformer oil tank desiccant sealing switching device and control method. Background Technology

[0002] The main transformer is the core hub equipment of the power transmission and distribution system. Its safe and stable operation is directly related to the reliability of the power grid. As a key supporting component of the main transformer, the oil conservator is used to compensate for the volume expansion and contraction of the transformer oil due to temperature changes, while preventing the intrusion of external moisture and impurities to protect the insulation performance of the transformer oil. The silica gel desiccant supporting the oil conservator is a core consumable material for maintaining a dry environment inside the oil conservator and ensuring the insulation safety of the transformer. Its moisture absorption efficiency, ease of replacement and operation sealing directly determine the service life and safety level of the main transformer.

[0003] Existing desiccant maintenance devices for main transformer oil conservators have many technical defects. Traditional desiccants require manual disassembly and replacement of the chamber periodically, which easily leads to moisture entering the transformer oil conservator and affecting the insulation performance of the transformer oil. The simple mechanical structure can only achieve manual rotation switching, which is cumbersome, time-consuming and labor-intensive, and difficult to adapt to the development trend of unattended and intensive operation and maintenance of substations. The device only relies on the desiccant to passively absorb moisture, without an active air circulation and ventilation mechanism. The humid gas inside the oil conservator cannot be quickly circulated and dehumidified. Under high humidity and high temperature outdoor conditions, the moisture absorption rate lags far behind the rate of moisture intrusion, resulting in poor dehumidification effect and rapid desiccant failure. The lack of oil filter elements and activated carbon filter components allows oil mist and dust impurities to easily adhere to and clog the surface of the desiccant, significantly reducing moisture absorption performance and shortening service life.

[0004] Therefore, developing a desiccant sealing switching device that requires no opening, allows for rapid switching, is sealed and moisture-proof, and provides visual monitoring is a technical problem that urgently needs to be solved in the field of power transformer operation and maintenance. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a main transformer oil conservator desiccant sealing switching device and control method. This solves the problems of cumbersome manual operation, poor sealing performance, low dehumidification efficiency, easy clogging, and inability to adapt to unattended operation and maintenance of traditional desiccants. The invention achieves automated desiccant switching, active circulation dehumidification, multi-stage filtration protection, visual monitoring, and autonomous power supply operation, thereby improving the intelligent level of transformer operation and maintenance and the safety of equipment operation.

[0006] This invention provides a main transformer oil conservator desiccant sealing switching device, comprising a mounting shell, a rotary switching assembly, and a dustproof and anti-condensation assembly;

[0007] The mounting shell is an openable structure, with two symmetrically arranged circular through holes on its bottom wall, each of which can be detachably fitted with a filter screen.

[0008] The rotary switching assembly includes a servo motor, a rotary roller, and a storage bin;

[0009] The servo motor is fixedly mounted on the top of the mounting housing, and its output shaft passes through the top of the mounting housing and extends into the interior of the mounting housing; the rotating roller is fixedly connected to the output shaft of the servo motor; the storage bins are evenly arranged along the circumference of the rotating roller and are detachably connected to the outer wall of the rotating roller, and the arrangement position of each group of storage bins is adapted to the circular through hole, and the bottom size of the storage bin matches the circular through hole.

[0010] During the rotation process, the rotating roller switches one set of storage bins to the position where the circular through hole is aligned and connected, and switches the other set of storage bins to the standby position;

[0011] The dustproof and anti-condensation component includes a connecting shell, a filter component, and a vortex air pump.

[0012] The connecting shell is fixedly installed on the outer bottom wall of the mounting shell. The connecting shell has a ventilation channel inside, and the vortex air pump is fixedly installed in the ventilation channel. One end of the ventilation channel is connected to the main transformer oil tank, and a sealing valve is provided at the connection between the ventilation channel and the main transformer oil tank. The filter assembly is disposed between the circular through hole and the ventilation channel.

[0013] Furthermore, the filtration assembly includes an activated carbon filter element and an oil filter element, with the activated carbon filter element located below the filter screen and the oil filter element located below the activated carbon filter element.

[0014] Furthermore, a sealing ring is provided at the bottom of the storage bin where it is aligned with the circular through hole; the storage bin is made of transparent material and the bottom of the storage bin has a breathable structure.

[0015] Furthermore, a power supply assembly is also provided on the top of the mounting housing. The power supply assembly includes a sleeve, a solar panel, an inverter, and a battery. The sleeve is fitted around the top outer periphery of the mounting housing. The solar panel is fixedly installed on the top of the sleeve. The inverter and the battery are fixedly installed on the top of the mounting housing. The solar panel, inverter, battery, vortex air pump, sealing valve, and servo motor are electrically connected.

[0016] Furthermore, the outer wall of the mounting shell is provided with a replacement port, and a hinged opening plate is hinged to the replacement port for the installation of the storage bin and the replacement of the desiccant; and the hinged opening plate and the replacement port are tightly fitted when closed. A humidity color-changing observation window is provided on the outer wall of the opening plate, and the humidity color-changing observation window is positioned opposite to the storage bin in the standby position.

[0017] Furthermore, a controller is also provided on the top of the mounting housing. The controller is electrically connected to the servo motor, the vortex air pump, the sealing valve, and the power supply components, and is used to collect detection signals and output control commands.

[0018] Furthermore, the mounting housing is equipped with a positioning detection device, which is connected to the controller signal to detect the alignment status of the storage bin and the circular through hole in real time, and uploads the alignment signal to the controller in real time to ensure the switching and docking accuracy.

[0019] Furthermore, a method for controlling the sealing switch of the desiccant in a main transformer oil conservator includes the following steps:

[0020] Equipment initialization calibration: The device is powered on and started. The controller completes the self-test initialization of the servo motor, vortex air pump, sealing valve and position detection device. The position detection device is used to calibrate the initial position of the two sets of storage bins to confirm that the storage bins in the working position are precisely aligned with the circular through hole and sealed in place.

[0021] Normal sealing ventilation and dehumidification: The controller controls the opening of the sealing valve and the start of the vortex air pump. The humid gas inside the main transformer oil conservator is dehumidified, degreased, and dust filtered through the ventilation channel, filter components, and working position storage silo, completing the gas circulation and ventilation inside the oil conservator. In the standby state of the equipment, the controller controls the sealing valve to close, maintaining the oil conservator and the inside of the device in a sealed state, isolating the outside humid air.

[0022] Real-time monitoring of operating conditions: Staff can observe the moisture absorption and color change of the desiccant inside the working storage silo in real time through the humidity color change observation window on the opening and closing plate. At the same time, the positioning detection device collects the positioning signal of the storage silo in real time and uploads it to the controller, monitoring the sealing and operating status of the device throughout the process.

[0023] Automatic desiccant switching: When the staff observes that the desiccant in the storage silo at the working position has changed color and failed to absorb moisture, and its dehumidification capacity has decreased, the controller immediately controls the vortex air pump to stop and the sealing valve to close. Then, the servo motor drives the rotating roller to rotate precisely, switching the storage silo in the standby state to the working connection position and switching the storage silo of the failed desiccant to the standby position.

[0024] Switching alignment verification and restarting operation: During the switching of the storage silo, the positioning detection device provides real-time feedback on the alignment data. When it is detected that the storage silo and the circular through hole are completely aligned and sealed, the controller controls the servo motor to stop, and reopens the sealing valve and the vortex air pump to restore the normal dehumidification and ventilation operation of the main transformer oil tank.

[0025] Offline replacement and maintenance: Staff can observe the status of the spare storage bin through the humidity color-changing observation window. After the desiccant inside the spare storage bin changes color and fails to absorb moisture, the controller will stop the vortex air pump and close the sealing valve. The opening and closing plate will be opened to disassemble the storage bin of the failed desiccant, replace the desiccant, and then reset and install it.

[0026] Furthermore, the device is powered autonomously by a top-mounted power supply component. Solar panels collect light energy, which is then converted into electrical energy by an inverter and stored in a battery to continuously power the servo motor, vortex air pump, sealing valve, controller, and detection equipment, enabling the device to operate autonomously without human intervention.

[0027] Furthermore, the air exchange rate of the vortex air pump can be adjusted according to the humidity value inside the main transformer oil tank; the higher the humidity value, the faster the air exchange rate.

[0028] The present invention has the following beneficial effects:

[0029] 1. This invention features a dual-set interchangeable storage bin and an electrically rotating switching structure, enabling automated switching of the desiccant. The switching process does not require opening the cover or disassembling the equipment, avoiding the moisture intrusion problem caused by traditional manual replacement methods. It ensures a sealed environment inside the oil tank throughout the process, effectively protecting the insulation performance of the transformer oil, while significantly reducing the intensity of manual maintenance and adapting to the unattended operation and maintenance needs of substations.

[0030] 2. This invention adds a vortex air pump active air circulation structure, breaking the traditional passive moisture absorption mode. It can drive the humid gas inside the oil tank to circulate rapidly and adjust the air exchange rate according to the ambient humidity. This greatly improves the dehumidification efficiency under complex working conditions of high humidity and high temperature, avoids the problem of desiccant moisture absorption lag and rapid failure, and extends the effective working time of desiccant.

[0031] 3. This invention is equipped with a multi-stage filtration structure consisting of an oil filter element, an activated carbon filter element, and a filter screen. This structure can filter oil mist, dust, and impurities layer by layer, effectively preventing clogging of the desiccant surface, continuously ensuring the moisture absorption performance of the desiccant, and further improving the operational stability and service life of the equipment.

[0032] 4. This invention is equipped with a solar-powered self-powered component, which enables the device to operate independently offline without relying on an external power source. It is suitable for outdoor substations without external power supply and enables all-weather unattended intelligent operation.

[0033] 5. This invention is equipped with a positioning detection device and a visual humidity color-changing observation window, which enables precise and controllable equipment switching and positioning, and intuitive visualization of the desiccant status. It combines operational stability with convenient monitoring. Maintenance personnel can replace the desiccant offline as needed without affecting the normal operation of the equipment.

[0034] 6. The overall sealing structure of this invention is well designed, and it can effectively seal in both switching and standby states, preventing external moisture and impurities from entering, and comprehensively ensuring a dry and clean environment inside the main transformer oil tank, thereby improving the overall operational safety level and service life of the main transformer. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the internal overall structure of a main transformer oil conservator desiccant sealing switching device provided in an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the overall structure of a main transformer oil conservator desiccant sealing switching device provided in an embodiment of the present invention;

[0038] Figure 3 A schematic diagram of the vortex air pump installation structure of a main transformer oil conservator desiccant sealing switching device provided in an embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of the installation structure of the rotary switching assembly of a main transformer oil conservator desiccant sealing switching device provided in an embodiment of the present invention;

[0040] Figure 5 This is a schematic diagram of the power supply component installation structure of a main transformer oil conservator desiccant sealing switching device provided in an embodiment of the present invention;

[0041] Figure 6 A schematic diagram of the filter assembly installation structure of a main transformer oil conservator desiccant sealing switching device provided in an embodiment of the present invention;

[0042] The reference numerals in the figures are as follows: 1. Mounting housing; 2. Rotary switching assembly; 21. Servo motor; 22. Rotary roller; 23. Storage hopper; 3. Dustproof and anti-condensation assembly; 31. Connecting housing; 32. Filter assembly; 321. Activated carbon filter element; 322. Oil filter element; 33. Vortex air pump; 4. Power supply assembly; 41. Sleeve; 42. Solar panel; 43. Inverter; 44. Battery; 5. Circular through hole; 6. Filter screen; 7. Ventilation channel; 8. Sealing valve; 9. Replacement port; 10. Opening and closing plate; 11. Humidity color change observation window; 12. Controller; 13. Detection device. Detailed Implementation

[0043] The present invention will be further described in detail below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0044] Please see the appendix Figures 1-6 The present invention provides an embodiment 1: a main transformer oil conservator desiccant sealing switching device includes a mounting shell 1, a rotary switching component 2, and a dustproof and anti-condensation component 3;

[0045] The mounting shell 1 is an openable structure, and its bottom wall has two symmetrically arranged circular through holes 5, and a filter screen 6 can be detachably installed in each of the circular through holes 5.

[0046] The rotary switching assembly 2 includes a servo motor 21, a rotary roller 22, and two sets of storage bins 23;

[0047] A servo motor 21 is fixedly mounted on the top of the mounting housing 1, and its output shaft passes through the top of the mounting housing 1 and extends into the interior of the mounting housing 1; a rotating roller 22 is fixedly connected to the output shaft of the servo motor 21; storage bins 23 are evenly arranged along the circumference of the rotating roller 22 and are detachably connected to the outer wall of the rotating roller 22, and the arrangement position of each set of storage bins 23 is adapted to the circular through hole 5, and the bottom size of the storage bin 23 matches the circular through hole 5; during the rotation of the rotating roller 22, one set of storage bins 23 is switched to the position aligned and connected with the circular through hole 5, and the other set of storage bins 23 is switched to the standby position;

[0048] With this configuration, the closable mounting shell 1 serves as the overall supporting shell, allowing for the disassembly and assembly of the storage hopper 23, desiccant replacement, and equipment maintenance through opening and closing. The two symmetrical circular through holes 5 at the bottom of the shell serve as air passages, corresponding to the working air passage position and the standby position, respectively, achieving a one-for-one standby air passage layout. The removable filter screen 6 inside the through holes blocks dust and large particles from entering the storage hopper 23, preventing blockage of the desiccant's permeable structure. The removable design of the filter screen 6 facilitates later cleaning and replacement, ensuring long-term unobstructed air passage.

[0049] Meanwhile, the servo motor 21 provides rotational power, and its output shaft drives the rotating roller 22 to rotate synchronously. Relying on the precise angle control of the servo motor 21, the angle of the rotating roller 22 is controllable and the start and stop are stable. The two sets of storage bins 23 are fixed on the outer wall of the rotating roller 22 and can be disassembled independently. Their positions and bottom dimensions are precisely matched with the bottom circular through holes 5. During normal operation, one set of storage bins 23 is aligned and connected with the corresponding circular through holes 5. The humid gas in the oil conservator enters the storage bin 23 through the through holes and comes into contact with the desiccant to complete the dehumidification operation. The other set of storage bins 23 is in standby mode. When the desiccant in the working position fails to absorb moisture, the servo motor 21 drives the rotating roller 22 to rotate, switching the standby storage bin 23 to the working position aligned with the through hole. The original failed storage bin 23 is switched to the standby position, completing the desiccant rotation. The bottom of the storage bin 23 is adapted to the through hole size to ensure that the air path is tightly connected after switching, without any air or moisture leakage.

[0050] The dustproof and anti-condensation component 3 includes a connecting shell 31, a filter component 32, and a vortex air pump 33;

[0051] The connecting shell 31 is fixedly installed on the outer bottom wall of the mounting shell 1. A ventilation channel 7 is provided inside the connecting shell 31. The vortex air pump 33 is fixedly installed inside the ventilation channel 7. One end of the ventilation channel 7 is connected to the main transformer oil tank, and a sealing valve 8 is provided at the connection between the ventilation channel 7 and the main transformer oil tank. The filter assembly 32 is set between the circular through hole 5 and the ventilation channel 7.

[0052] With this configuration, the connecting shell 31 is fixed to the outer bottom wall of the mounting shell 1. Its internal ventilation channel 7 forms a sealed ventilation passage for the main transformer oil conservator, the vortex air pump 33, the filter assembly 32, and the storage bin 23, achieving directional gas circulation. The vortex air pump 33 in the ventilation channel 7 serves as the power source for gas circulation, actively extracting humid gas from inside the oil conservator and pushing the gas through the ventilation channel 7, the filter assembly 32, and the circular through-hole 5 into the storage bin 23 to complete dehumidification before returning to the oil conservator, breaking the traditional passive moisture absorption mode. The sealing valve 8 at the connection between the ventilation channel 7 and the main transformer oil conservator can control the opening and closing of the gas path. It is opened during dehumidification to ensure normal gas circulation and closed during standby, desiccant switching, or maintenance to isolate external moisture and air. The filter assembly 32, arranged between the circular through-hole 5 and the ventilation channel 7, can remove oil mist, dust, and impurities from the gas, preventing desiccant blockage and transformer oil contamination. At the same time, it blocks external condensation moisture from intruding, achieving dustproof and anti-condensation protection.

[0053] Furthermore, in another embodiment of the present invention, the filter assembly 32 includes an activated carbon filter element 321 and an oil filter element 322, wherein the activated carbon filter element 321 is located below the filter screen 6 and the oil filter element 322 is located below the activated carbon filter element 321.

[0054] With this configuration, gas enters the circular through-hole 5 from bottom to top through the ventilation channel 7 from the main transformer oil conservator, flows sequentially through the oil filter element 322 and the activated carbon filter element 321, and finally enters the storage bin 23 through the filter screen 6. The oil filter element 322 first filters out the transformer oil mist and oil gas particles carried in the gas in the oil conservator, the activated carbon filter element 321 further adsorbs fine dust, organic impurities and some water vapor, and the filter screen 6 blocks the reverse intrusion of external dust, thus realizing multi-stage progressive filtration.

[0055] Furthermore, a sealing ring is provided at the bottom of the storage bin 23 where it is aligned with the circular through hole 5; the storage bin 23 is made of transparent material and the bottom of the storage bin 23 has a breathable structure;

[0056] With this design, the bottom ventilated structure of the storage silo 23 allows the gas from the oil pillow side to enter the silo smoothly and come into full contact with the desiccant to achieve dehumidification; when the storage silo 23 is connected to the circular through hole 5, the sealing ring at the connection point is compressed to form a sealing surface, sealing the connection gap and preventing gas leakage and the intrusion of external moisture and impurities; the storage silo 23 is made of transparent material, so the moisture absorption and color change of the desiccant inside the silo can be directly observed from the outside, and its failure status can be judged in real time;

[0057] Furthermore, in another embodiment of the present invention, a power supply component 4 is also provided on the top of the mounting shell 1. The power supply component 4 includes a sleeve 41, a solar panel 42, an inverter 43, and a battery 44. The sleeve 41 is fitted around the top outer periphery of the mounting shell 1. The solar panel 42 is fixedly installed on the top of the sleeve 41. The inverter 43 and the battery 44 are fixedly installed on the top of the mounting shell 1. The solar panel 42, the inverter 43, the battery 44, the vortex air pump 33, the sealing valve 8, and the servo motor 21 are electrically connected.

[0058] With this configuration, the sleeve 41 is fitted around the top of the mounting shell 1 to provide stable support for the solar panel 42. The solar panel 42 receives outdoor sunlight, which is converted into electrical energy for the device by the inverter 43 and stored in the battery 44. The battery 44 continuously supplies power to all electrical components such as the servo motor 21, the vortex air pump 33, and the sealing valve 8, enabling the entire device to operate independently.

[0059] Furthermore, in another embodiment of the present invention, the outer wall of the mounting shell 1 is provided with a replacement port 9, and a hinged opening plate 10 is hinged to the replacement port 9 for the installation of the storage bin 23 and the replacement of the desiccant; and the hinged opening plate 10 and the replacement port 9 are tightly fitted in the closed state, and a humidity color-changing observation window 11 is provided on the outer wall of the opening plate 10, and the humidity color-changing observation window 11 is arranged opposite to the storage bin 23 in the standby position;

[0060] The replacement port 9 on the outer wall of the mounting shell 1 is opened and closed by a hinged opening and closing plate 10. Opening the opening and closing plate 10 allows for the disassembly and assembly of the storage bin 23 in the standby position and the replacement of the desiccant. During the operation, the storage bin 23 in the working position remains sealed and dehumidified. The humidity color change observation window 11 on the opening and closing plate 10 corresponds to the position of the standby storage bin 23. Maintenance personnel can visually observe the moisture absorption and color change of the desiccant in the standby bin through the observation window to determine whether the desiccant has failed.

[0061] Furthermore, in another embodiment of the present invention, a controller 12 is also provided on the top of the mounting shell 1. The controller 12 is electrically connected to the servo motor 21, the vortex air pump 33, the sealing valve 8 and the power supply component 4 respectively, and is used to collect detection signals and output control commands.

[0062] With this configuration, the controller 12, as the core control unit of the entire device, is located on the outer wall of the mounting shell 1. It is connected to the servo motor 21, the vortex air pump 33, the sealing valve 8, and the power supply component 4 via electrical signals. It receives the operating status and power supply signals of each component in real time, collects working condition information according to the preset operating logic, and outputs control commands accordingly to regulate the desiccant switching action, the start and stop of the air pump, the opening and closing of the sealing valve 8, and the power supply management of the power supply component 4, thereby realizing the overall automated control of the device.

[0063] Furthermore, in another embodiment of the present invention, the mounting shell 1 is provided with a positioning detection device 13, which is signal-connected to the controller 12 and is used to detect the alignment status of the storage bin 23 and the circular through hole 5 in real time, and upload the alignment signal to the controller 12 in real time to ensure the switching docking accuracy.

[0064] With this configuration, the positioning detection device 13 is built into the mounting housing 1 and establishes a real-time signal connection with the controller 12. During the entire process of the servo motor 21 driving the storage bin 23 to rotate and switch, the device continuously collects the alignment position and contact status signals of the storage bin 23 and the circular through hole 5 in real time, and uploads the detection data to the controller 12 in real time. Based on the feedback of the accurate alignment signal, the controller 12 intelligently judges whether the docking is in place, and then accurately controls the start and stop of the servo motor 21 to correct the rotation position, ensuring that after each switch, the storage bin 23 can be accurately aligned and seamlessly docked with the circular through hole 5, realizing closed-loop precise control of the switching alignment.

[0065] An embodiment 2 of the present invention provides a method for controlling the sealing switching of the desiccant in a main transformer oil conservator, comprising the following steps:

[0066] Equipment initialization calibration: When the device is powered on, the controller 12 completes the self-test initialization of the servo motor 21, vortex air pump 33, sealing valve 8, and position detection device 13. The position detection device 13 calibrates the initial position of the two sets of storage bins 23 to confirm that the working position storage bin 23 is precisely aligned with the circular through hole 5 and sealed in place.

[0067] Normal sealing ventilation and dehumidification: Controller 12 controls the opening of sealing valve 8 and starts vortex air pump 33. The humid gas inside the main transformer oil conservator is dehumidified, degreased, and dust filtered through ventilation channel 7, filter component 32, and working position storage bin 23, completing the gas circulation and ventilation inside the oil conservator. In the standby state of the equipment, controller 12 controls the closing of sealing valve 8 to maintain the sealing state of the oil conservator and the device, and isolate the outside humid air.

[0068] Real-time monitoring of working conditions: Staff can observe the moisture absorption and color change status of the desiccant inside the working storage bin 23 in real time through the humidity color change observation window 11 on the opening and closing plate 10. At the same time, the positioning detection device 13 collects the positioning signal of the storage bin 23 in real time and uploads it to the controller 12, and monitors the device's connection sealing and operating status throughout the process.

[0069] Automatic desiccant switching: When the staff observes that the desiccant in the storage bin 23 at the working position has changed color and failed to absorb moisture, and its dehumidification capacity has decreased, the controller 12 immediately controls the vortex air pump 33 to stop and the sealing valve 8 to close. Then, the servo motor 21 drives the rotating roller 22 to rotate precisely, switching the storage bin 23 in the standby state to the working connection position and switching the storage bin 23 of the failed desiccant to the standby position.

[0070] Switching alignment verification and restarting operation: During the switching process of storage silo 23, the positioning detection device 13 provides real-time feedback on alignment data. When it is detected that the storage silo 23 and the circular through hole 5 are completely aligned and sealed, the controller 12 controls the servo motor 21 to stop, and reopens the sealing valve 8 and the vortex air pump 33 to restore the normal dehumidification and ventilation operation of the main transformer oil tank.

[0071] Offline replacement and maintenance: Staff can observe the status of the spare storage bin 23 through the humidity color change observation window 11. After the desiccant inside the spare storage bin 23 changes color and fails to absorb moisture, the controller 12 controls the vortex air pump 33 to stop and the sealing valve 8 to close. The opening and closing plate 10 is then opened to disassemble the storage bin 23 containing the failed desiccant, replace the desiccant, and then reset and install it.

[0072] Furthermore, in another embodiment of the present invention, the device is powered autonomously by the top power supply component 4. The solar panel 42 collects light energy, which is converted into electrical energy by the inverter 43 and stored in the battery 44 to continuously power the servo motor 21, the vortex air pump 33, the sealing valve 8, the controller 12 and the detection equipment, so as to realize the unattended autonomous operation of the device.

[0073] Furthermore, in another embodiment of the present invention, the air exchange rate of the vortex air pump 33 can be adjusted according to the humidity value inside the main transformer oil conservator; the higher the humidity value, the faster the air exchange rate.

[0074] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A main transformer oil pillow desiccant seal switching device, characterized by, It includes a mounting housing (1), a rotary switching assembly (2), and a dustproof and anti-condensation assembly (3); The mounting shell (1) is an openable structure, and its bottom wall has two symmetrically arranged circular through holes (5), and a filter screen (6) can be detachably installed in each of the circular through holes (5). The rotary switching assembly (2) includes a servo motor (21), a rotary roller (22), and a storage bin (23). The servo motor (21) is fixedly installed on the top of the mounting shell (1), and its output shaft passes through the top of the mounting shell (1) and extends into the interior of the mounting shell (1); the rotating roller (22) is fixedly connected to the output shaft of the servo motor (21); the storage bins (23) are evenly arranged along the circumference of the rotating roller (22) and are detachably connected to the outer wall of the rotating roller (22), the arrangement position of each set of storage bins (23) is adapted to the circular through hole (5), and the bottom size of the storage bins (23) matches the circular through hole (5); During the rotation process, the rotating roller (22) switches one set of storage bins (23) to the position where the circular through hole (5) is aligned and connected, and switches the other set of storage bins (23) to the standby position; The dustproof and anti-condensation component (3) includes a connecting shell (31), a filter component (32), and a vortex air pump (33). The connecting shell (31) is fixedly installed on the outer bottom wall of the mounting shell (1). A ventilation channel (7) is provided inside the connecting shell (31). The vortex air pump (33) is fixedly installed inside the ventilation channel (7). One end of the ventilation channel (7) is connected to the main transformer oil tank, and a sealing valve (8) is provided at the connection between the ventilation channel (7) and the main transformer oil tank. The filter assembly (32) is disposed between the circular through hole (5) and the ventilation channel (7).

2. The main transformer oil pillow desiccant sealing switching device according to claim 1, characterized in that, The filter assembly (32) includes an activated carbon filter element (321) and an oil filter element (322), with the activated carbon filter element (321) located below the filter screen (6) and the oil filter element (322) located below the activated carbon filter element (321).

3. The main transformer oil pillow desiccant sealing switching device according to claim 1, characterized in that, The bottom of the storage bin (23) is aligned with the circular through hole (5) and a sealing ring is provided; the storage bin (23) is made of transparent material and the bottom of the storage bin (23) is a breathable structure.

4. The main transformer oil pillow desiccant sealing switching device according to claim 1, characterized in that, The top of the mounting housing (1) is also provided with a power supply component (4), which includes a sleeve (41), a solar panel (42), an inverter (43), and a battery (44). The sleeve (41) is fitted around the top of the mounting housing (1). The solar panel (42) is fixedly installed on the top of the sleeve (41). The inverter (43) and the battery (44) are fixedly installed on the top of the mounting housing (1). The solar panel (42), inverter (43), battery (44), vortex air pump (33), sealing valve (8), and servo motor (21) are electrically connected.

5. The main transformer oil conservator desiccant sealing switching device according to claim 1, characterized in that, The outer wall of the mounting shell (1) is provided with a replacement port (9), and a hinged opening plate (10) is hinged to the replacement port (9) for the installation of the storage bin (23) and the replacement desiccant replacement. The hinged opening plate (10) and the replacement port (9) are tightly fitted in the closed state. A humidity color-changing observation window (11) is provided on the outer wall of the opening plate (10), and the humidity color-changing observation window (11) is set opposite to the storage bin (23) in the standby position.

6. A main transformer oil pillow desiccant sealing switching device according to claim 1, characterized in that, The top of the mounting housing (1) is also provided with a controller (12), which is electrically connected to the servo motor (21), the vortex air pump (33), the sealing valve (8) and the power supply component (4) respectively, and is used to collect detection signals and output control commands.

7. A main transformer oil pillow desiccant sealing switching device according to claim 1, characterized in that, The mounting housing (1) is equipped with a positioning detection device (13), which is connected to the controller (12) for real-time detection of the alignment status of the storage bin (23) and the circular through hole (5), and uploads the alignment signal to the controller (12) in real time to ensure the switching and docking accuracy.

8. A main transformer oil pillow desiccant seal switching control method, characterized by, The main transformer oil conservator desiccant sealing switching device according to any one of claims 1-7 includes the following steps: Equipment initialization calibration: The device is powered on and started. The controller (12) completes the self-test initialization of the servo motor (21), vortex air pump (33), sealing valve (8), and position detection device (13). The position detection device (13) calibrates the initial position of the two sets of storage bins (23) to confirm that the working position storage bin (23) and the circular through hole (5) are precisely aligned and sealed in place. Normal sealing ventilation and dehumidification: The controller (12) controls the sealing valve (8) to open and the vortex air pump (33) to start. The humid gas inside the main transformer oil conservator is dehumidified, degreased, and dust filtered through the ventilation channel (7), filter assembly (32), and working position storage bin (23), completing the gas circulation and ventilation inside the oil conservator. In the standby state of the equipment, the controller (12) controls the sealing valve (8) to close, maintaining the oil conservator and the device in a sealed state, isolating the outside humid air. Real-time monitoring of working conditions: Staff members observe the moisture absorption and color change status of the desiccant inside the working storage bin (23) in real time through the humidity color change observation window (11) on the opening and closing plate (10). At the same time, the positioning detection device (13) collects the positioning signal of the storage bin (23) in real time and uploads it to the controller (12). The device docking sealing and operating status are monitored throughout the process. Automatic desiccant switching: When the staff observes that the desiccant in the storage bin (23) at the working position changes color and fails to absorb moisture, and the dehumidification capacity decreases, the controller (12) immediately controls the vortex air pump (33) to stop and the sealing valve (8) to close. Then, the servo motor (21) drives the rotating roller (22) to rotate precisely, switching the storage bin (23) in the standby state to the working connection position and switching the storage bin (23) with the failed desiccant to the standby position. Switching alignment verification and restarting operation: During the switching process of the storage bin (23), the positioning detection device (13) provides real-time feedback on the alignment data. When it is detected that the storage bin (23) and the circular through hole (5) are completely aligned and sealed, the controller (12) controls the servo motor (21) to stop, and reopens the sealing valve (8) and the vortex air pump (33) to restore the normal dehumidification and ventilation operation of the main transformer oil tank. Offline replacement and maintenance: Staff can observe the status of the spare storage bin (23) through the humidity color observation window (11). After the desiccant inside the spare storage bin (23) changes color and fails to absorb moisture, the controller (12) controls the vortex air pump (33) to stop and the sealing valve (8) to close. The opening and closing plate (10) is opened to disassemble and replace the desiccant in the storage bin (23) with the failed desiccant. After completion, the bin is reset and installed.

9. The main transformer oil pillow desiccant seal switching control method of claim 8, wherein, The device is powered autonomously by the top power supply component (4). The solar panel (42) collects light energy, which is converted into electrical energy by the inverter (43) and stored in the battery (44). This provides continuous power to the servo motor (21), the vortex air pump (33), the sealing valve (8), the controller (12), and the detection equipment, enabling the device to operate autonomously without human intervention.

10. The main transformer oil pillow desiccant seal switching control method of claim 8, wherein, The air exchange rate of the vortex air pump (33) can be adjusted according to the humidity value inside the main transformer oil tank. The higher the humidity value, the faster the air exchange rate.

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