Explosion-proof transformer dehumidifying device

Abstract

The present application relates to transformer dehumidification technical field, especially, it is a kind of explosion-proof transformer dehumidification device, including placement room, the four sides of placement room are equipped with protective door, the lower part of protective door is equipped with first ventilation window, the upper part of protective door is equipped with exhaust fan, dehumidification equipment is equipped in placement room, and dehumidification equipment is connected in the transformer in placement room and carries out dehumidification.The present application can effectively maintain the stable air pressure in the room by setting the closed placement room and matching the ventilation window and the exhaust fan, isolate external open fire, dust, meet the explosion-proof use requirement of transformer substation, avoid the security risk such as insulation decline, short circuit caused by moisture of transformer from the root.

Description

Technical Field

[0001] This invention relates to the field of transformer dehumidification technology, and in particular to an explosion-proof transformer dehumidification device. Background Technology

[0002] A transformer is a device that uses the principle of electromagnetic induction to change current and voltage. Transformers are commonly used for voltage step-up and step-down, matching resistors, and safety isolation. The main components include the primary coil, secondary coil, and iron core, all housed in the transformer tank. Transformers have certain requirements regarding the humidity of the environment. The higher the internal humidity, the worse the insulation of the transformer. If the humidity is too high, the moisture in the air will cause the insulation layer of the primary and secondary coils to age and break down. This is especially true at night when the air humidity is even higher. When the external humidity is high, the insulation inside the transformer will be even lower, which can easily lead to accidents. Therefore, dehumidification devices are needed to dehumidify the transformer.

[0003] In particular, explosion-proof transformers are commonly used in mines. Ordinary dehumidifying breathers contain oil, which can easily lead to explosions. In addition, dehumidifying breathers need to be replaced every 3-4 months to ensure dehumidification. Without filtration equipment, impurities can easily be drawn into the transformer, causing internal problems. Summary of the Invention

[0004] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and other accompanying drawings.

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide an explosion-proof transformer dehumidification device to solve the existing problems.

[0006] To achieve the above objectives, the technical solution of the present invention is: an explosion-proof transformer dehumidification device, comprising: The placement room has protective doors on all four sides. The lower part of each protective door has a first ventilation window, and the upper part of each protective door has an exhaust fan. The placement room is equipped with dehumidification equipment, which is connected to a transformer in the placement room for dehumidification. The dehumidification device includes a filter cabinet with an air inlet at one end. A filter assembly is installed in the air inlet. The filter cabinet has a first placement layer, a second placement layer, and a third placement layer arranged sequentially from top to bottom. The first, second, and third placement layers are interconnected. The first, second, and third placement layers are respectively provided with a first placement slot, a second placement slot, and a third placement slot. The top and bottom of the second placement slot are each provided with a first mounting slot. A support plate is connected to the first mounting slot. A rotating assembly is installed in the first mounting slot and is connected to the support plate. A filter plate is placed in the first placement slot. The internal cavities of the second placement slot are interconnected. The second placement layer is connected to the air inlet. The other end of the second placement layer is connected to a first connecting pipe, which is connected to a dehumidification cabinet. The dehumidification cabinet is connected to a transformer via a third connecting pipe.

[0007] In some embodiments, the filtration assembly includes a condensing device installed in a filter cabinet. A condensing rack is installed in the air inlet and is connected to the condensing device. The condensing rack matches the air inlet and has a filter screen installed in it. The filter screen is vertically arranged and wavy, forming a downward channel. A drain groove is provided at the bottom of the air inlet, and a drain outlet is provided at the bottom of the drain groove. A one-way valve is provided on the drain outlet.

[0008] In some embodiments, a first pull-out opening is provided on one side of the first placement slot, a matching first pull-out box is provided inside the first placement layer, a first handle is provided on one side of the first pull-out box, and the first placement slot is disposed in the first placement layer.

[0009] In some embodiments, a second pull-out opening is provided on one side of the third placement slot, a matching second pull-out box is provided inside the third placement layer, a second handle is provided on one side of the second pull-out box, the third placement slot is disposed in the third placement layer, and a sealing component is provided on the top of the third placement slot.

[0010] In some embodiments, the rotating assembly includes a fixed rod, which is installed in a through groove on one side of the first mounting groove. The fixed rod has a rotating groove, and a rotating rod is provided in the rotating groove. One end of the rotating rod passes through the rotating groove and is connected to a support plate. The other end of the rotating rod is fitted with a limiting sleeve. The end face of the limiting sleeve has an X-shaped cross groove. A sliding member is provided in the X-shaped cross groove. The sliding member is connected to a pressing rod. A first spring is provided at the bottom of the pressing rod. The first spring is connected to the rotating rod. One end of the pressing rod extends out of the filter cabinet.

[0011] In some embodiments, the slider includes a sliding rod, which is fixedly connected to the pressing rod. One end of the sliding rod is provided with a groove, and a second spring is provided in the groove. The second spring is connected to a sliding block, and the sliding block is slidably connected to an X-shaped cross groove.

[0012] In some embodiments, the desiccant is provided with second mounting slots on both sides and multiple desiccant slots in the middle. Multiple second connecting pipes are installed in each of the second mounting slots. The second connecting pipes are respectively connected to the two ends of the corresponding desiccant slots. Switching components are installed between the second connecting pipe on one side and the first connecting pipe, and between the second connecting pipe on the other side and the third connecting pipe. Humidity sensors are installed in each of the desiccant slots.

[0013] In some embodiments, the switching assembly includes a connecting box, which is cylindrical. One end of the connecting box has connecting pipe openings with equal spacing, which are connected to corresponding second connecting pipes. The connecting box contains a rotating plate with toothed grooves on its outer wall. The toothed grooves mesh with gears driven by a motor. The rotating plate has openings that match the connecting pipe openings. One end of the rotating plate has an extension pipe, which is rotatably connected to the second connecting pipe and the third connecting pipe, respectively.

[0014] In some embodiments, a pressing element is provided outside the pressing rod, and the pressing element includes an electric telescopic rod corresponding to the pressing rod. The electric telescopic rod is installed on the outer wall of the filter cabinet through a support frame.

[0015] In some embodiments, a sealing plate is provided at the top of the third placement groove, a limiting groove is provided on one side of the third placement groove, and a third mounting groove is provided on the other side of the third placement groove. The third mounting groove is connected to the sealing plate by a torsion spring. The distance between the sealing plate and the bottom support plate of the second placement groove is less than the length of the support plate. When the support plate is flipped, the sealing plate can be pressed down.

[0016] By adopting the above technical solution, the beneficial effects of the present invention are: By setting up a sealed storage room with ventilation windows and exhaust fans, the air pressure inside the room can be kept stable, and external open flames and dust can be isolated, meeting the explosion-proof requirements of substations and avoiding safety hazards such as insulation degradation and short circuits caused by moisture in transformers from the root.

[0017] The filter cabinet adopts a three-layer layered placement structure, with interchangeable filter plates, so that the four filter plates only need to be replaced once a year, which greatly reduces the frequency of filter consumable replacement and maintenance workload. Moreover, the replacement process follows the order of first placing the new plate and then storing the old plate, without interrupting the filtration process and ensuring the continuity of dehumidification operation.

[0018] The wavy condenser filter at the air inlet works in conjunction with the condensation equipment to efficiently intercept dust and impurities, remove a large amount of liquid water vapor from the air in advance through condensation and dehydration, and clean the filter screen by the flow of condensed water droplets, thereby extending the filter screen's service life and reducing the load on the downstream dehumidification cabinet.

[0019] The rotating assembly adopts an X-shaped cross-slide self-locking structure, coupled with an external electric telescopic rod, which enables automated remote control of the support plate. It is convenient to operate and has high self-locking reliability. At the same time, the support plate and the sealing plate of the third placement slot are linked to open and close, simplifying the filter plate replacement steps and improving maintenance efficiency. Then, the dehumidification cabinet adopts a multi-dehumidification tank independently arranged structure. With the help of a motor-driven switching component and humidity sensor, the dehumidification tank can automatically rotate, eliminating the need for frequent shutdowns to replace the dehumidification material and ensuring uninterrupted dehumidification of the transformer.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0021] Undoubtedly, such and other objects of the present invention will become more apparent after the following detailed description of the preferred embodiments, which are illustrated in various accompanying drawings and figures.

[0022] To make the above and other objects, features and advantages of the present invention more apparent and understandable, one or more preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0024] In the accompanying drawings, the same parts use the same reference numerals, and the drawings are schematic and not necessarily drawn to actual scale.

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, 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 one or more embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on such drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the placement room according to some embodiments of the present invention; Figure 2 This is a schematic diagram of the structure of a dehumidification device according to some embodiments of the present invention; Figure 3 This is a schematic diagram of the internal structure of a dehumidification device according to some embodiments of the present invention; Figure 4 This is a schematic diagram of the internal structure of the dehumidifying cabinet according to some embodiments of the present invention; Figure 5 This is a schematic diagram of the structure of the filter screen according to some embodiments of the present invention; Figure 6 This is a schematic diagram of the structure of the rotating assembly according to some embodiments of the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the structure of the rotating assembly according to some embodiments of the present invention. Figure 2 ; Figure 8 This is a schematic diagram of the structure of a torsion spring according to some embodiments of the present invention; Figure 9 This is a schematic diagram of the structure of the switching component in some embodiments of the present invention. Figure 1 ; Figure 10 This is a schematic diagram of the structure of the switching component in some embodiments of the present invention. Figure 2 ; Figure 11 This is a schematic diagram of the pressing component according to some embodiments of the present invention.

[0027] Explanation of reference numerals in the attached figures: 1. Storage room; 11. Protective door; 12. First ventilation window; 13. Exhaust fan; 2. Dehumidification equipment; 21. Filter cabinet; 22. Air inlet; 23. Filter assembly; 231. Condensation equipment; 232. Condensation rack; 233. Filter screen; 234. Drainage trough; 235. Drain outlet; 236. One-way valve; 24. First placement layer; 25. Second placement layer; 26. Third placement layer; 27. First connecting pipe; 3. First placement slot; 31. Second placement slot; 32. Third placement slot; 321. Second pull-out opening; 322. Second pull-out box; 323. Second handle; 324. Sealing assembly; 325. Sealing plate; 326. Limiting groove; 327. Third mounting groove; 328. Torsion spring; 33. First mounting groove; 34. Support plate; 35. Rotating assembly; 351. Fixed rod; 352. Through groove; 353. Rotating groove; 354. Rotating rod; 355. Limiting sleeve; 356. X-shaped cross slide; 357. Sliding element; 3571. Sliding rod; 3572. Groove; 3573. Sliding block; 3574. Second spring; 358. Pressing rod; 3581. First spring; 36. First pull-out opening; 37. First pull-out box; 38. Filter plate; 39. First handle; 4. Dehumidifier cabinet; 41. Second mounting slot; 42. Dehumidifier slot; 43. Second connecting pipe; 44. Switching assembly; 441. Connecting box; 442. Connecting pipe port; 443. Rotating plate; 444. Gear; 445. Gear; 446. Motor; 447. Opening; 448. Extension pipe; 5. Third connecting pipe; 6. Pressing component; 61. Electric telescopic rod; 62. Support frame. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0029] Furthermore, in the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies are not connected through a transitional structure, but rather formed as a whole through a connecting structure. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0033] Reference Figure 1-3 This invention provides an explosion-proof transformer dehumidification device, including a placement room 1. The placement room 1 has protective doors 11 on all four sides. A first ventilation window 12 is provided at the bottom of each protective door 11, and an exhaust fan 13 is provided at the top of each protective door 11. A dehumidification device 2 is installed inside the placement room 1, and the dehumidification device 2 is connected to the transformer in the placement room 1 for dehumidification. The dehumidification device 2 includes a filter cabinet 21, with an air inlet 22 at one end. A filter assembly 23 is installed in the air inlet 22. The filter cabinet 21 has a first placement layer 24, a second placement layer 25, and a third placement layer 26 arranged sequentially from top to bottom. The first placement layer 24, the second placement layer 25, and the third placement layer 26 are interconnected. The first placement layer 24, the second placement layer 25, and the third placement layer 26 are respectively provided with a first placement slot 3, a second placement slot 31, and a third placement slot 32. The second placement slot 31 is provided with a first mounting slot 33 at both the top and bottom. The first mounting slot 33 is connected to a support plate 34. A rotating component 35 is provided in the first mounting slot 33. The rotating component 35 is connected to the support plate 34. A filter plate 38 is placed in the first placement slot 3. The internal cavities of the second placement slot 31 are interconnected. The second placement layer 25 is connected to the air inlet 22. The other end is connected to a first connecting pipe 27. The first connecting pipe 27 is connected to the dehumidification cabinet 4. The dehumidification cabinet 4 is connected to the transformer through a third connecting pipe 5.

[0034] Specifically, the transformer is housed inside a sealed storage room 1. The first ventilation window 12 at the bottom of the protective doors 11 around the storage room 1 allows for basic air circulation between the inside and outside. The exhaust fan 13 at the top promptly removes high-humidity and high-temperature air from the storage room 1, maintaining stable internal air pressure and meeting explosion-proof ventilation requirements. Then, humid outdoor air is introduced through the air inlet 22 of the filter cabinet 21. After passing through the filter assembly 23, most of the dust and other substances are blocked before entering the second storage layer 25. Therefore, during use, the filter plate 38, composed of activated carbon and other materials, needs to be placed in the first storage slot 3 of the first storage layer 24. Then, the filter plate 38 in the first storage slot 3 is opened using the rotating assembly 35 via the support plate 34 at the top of the second storage slot 31, allowing the filter plate 38 to fall into the second storage slot 31 for filtration. A baffle plate is fixed to the bottom of the filter plate 38 to cover the bottom of the first placement slot 3, preventing other air from entering the area where other filter plates 38 are placed. After a period of use, it is best to set up four placement slots and replace the filter plates every three months. This way, the replacement cycle can be reduced to one year, avoiding frequent replacement of filter plates 38 within a year. After the usage period is over, the used filter plate 38 is placed in the third placement slot 32 by rotating the bottom support plate 34. When the filter plate 38 reaches the end of its service life and needs to be replaced, the rotating component 35 is operated to open the bottom support plate 34 of the second placement slot 31, and the used filter plate 38 falls and is stored in the third placement slot 32. The replacement operation follows the order of first placing the new filter plate 38 and then placing the old filter plate 38. Throughout the process, a filter plate 38 is always in the working position of the second placement slot 31 to avoid interrupting the filtration process during replacement. After multi-stage filtration and dehumidification, the air is sent to the dehumidification cabinet 4 for deep dehumidification through the first connecting pipe 27. The dry air is sent into the transformer through the third connecting pipe 5 to continuously eliminate moisture inside the equipment and prevent condensation insulation failure.

[0035] Reference Figure 3 and Figure 5 According to some embodiments of the present invention, optionally, the filter assembly 23 includes a condenser 231, which is installed in the filter cabinet 21. A condenser rack 232 is installed in the air inlet 22. The condenser rack 232 is connected to the condenser 231 and matches the air inlet 22. A filter screen 233 is provided in the condenser rack 232. The filter screen 233 is vertically arranged and wavy, forming a downward channel. A drain groove 234 is provided at the bottom of the air inlet 22. A drain outlet 235 is provided at the bottom of the drain groove 234. A one-way valve 236 is provided on the drain outlet 235.

[0036] Specifically, after humid air enters the air inlet 22, it first passes through the corrugated vertical filter screen 233. The corrugated structure increases the air contact area, effectively intercepting dust and lint in the air. The condensing device 231 continuously cools the condenser rack 232. Water vapor in the air liquefies upon cooling, forming water droplets. The water droplets drip down the downward guide channel between the corrugated filters to the bottom drain trough 234 for collection. The accumulated water is discharged outward through the drain outlet 235. The one-way valve 236 only allows the accumulated water to flow out in one direction, preventing outside air and water vapor from flowing back into the filter cabinet 21. This removes a large amount of liquid water vapor from the air in advance, reducing the adsorption load on the downstream desiccant cabinet 4. The water droplets can also be used to clean the dust on the filter screen 233 as they flow downward.

[0037] Reference Figure 3 According to some embodiments of the present invention, optionally, a first pull-out opening 36 is provided on one side of the first placement slot 3, a matching first pull-out box 37 is provided inside the first placement layer 24, a first handle 39 is provided on one side of the first pull-out box 37, and the first placement slot 3 is disposed in the first placement layer 24.

[0038] Specifically, all spare filter plates 38 are placed inside the first pull-out box 37. During normal storage, the pull-out box is completely stored inside the first placement layer 24. When it is necessary to replenish or replace the filter plates 38, hold the first handle 39 and pull the pull-out box outward from the first pull-out port 36 to fill multiple filter plates 38 at once. After filling, push the box back to restore the sealed storage. There is no need to disassemble the filter cabinet 21 as a whole, making maintenance and operation simple and efficient.

[0039] Reference Figure 3 According to some embodiments of the present invention, optionally, a second pull-out opening 321 is provided on one side of the third placement slot 32, a matching second pull-out box 322 is provided inside the third placement layer 26, a second handle 323 is provided on one side of the second pull-out box 322, the third placement slot 32 is disposed in the third placement layer 26, and a sealing component 324 is provided on the top of the third placement slot 32.

[0040] Specifically, the old filter plates 38 that have reached the end of their service life fall into the third placement slot 32 and are then stored in the second pull-out box 322. When the replacement cycle arrives, the second pull-out box 322 is pulled out from the second pull-out port 321 through the second handle 323, and the discarded filter plates 38 are taken out. The top sealing component 324 normally seals the upper gap of the third placement slot 32 to prevent undried air from escaping from the gap, and forces all airflow to pass completely through the filter structure in the second placement layer 25 to ensure the overall dehumidification and drying effect.

[0041] Reference Figure 6-7According to some embodiments of the present invention, optionally, the rotating assembly 35 includes a fixed rod 351, which is installed in a through groove 352 on one side of the first mounting groove 33. The fixed rod 351 is provided with a rotating groove 353, and a rotating rod 354 is provided in the rotating groove 353. One end of the rotating rod 354 passes through the rotating groove 353 and is connected to the support plate 34. The other end of the rotating rod 354 is fitted with a limiting sleeve 355. The end face of the limiting sleeve 355 is provided with an X-shaped cross slide groove 356. A sliding member 357 is provided in the X-shaped cross slide groove 356. The sliding member 357 is connected to a pressing rod 358. A first spring 3581 is provided at the bottom of the pressing rod 358. The first spring 3581 is connected to the rotating rod 354. One end of the pressing rod 358 extends out of the filter cabinet 21.

[0042] Specifically, under normal conditions, the first spring 3581 pushes the pressing rod 358 outward, and the sliding member 357 engages with the X-shaped cross groove 356 of the limiting sleeve 355 to lock, restricting the rotation of the rotating rod 354. The support plate 34 remains horizontally closed, blocking the corresponding channel. Pressing the pressing rod 358 inward can compress the first spring 3581, causing the sliding member 357 to slide along the X-shaped cross groove 356 to release the lock. At this time, the pressing rod 358 can be rotated to drive the rotating rod 354 to rotate synchronously, driving the support plate 34 to flip open, allowing the filter plate 38 to fall. After releasing the pressing rod 358, the first spring 3581 rebounds, and the sliding member 357 slides along the X-shaped cross groove 356 again and locks the rotating rod 354. The support plate 34 is fixed at the current opening and closing angle, thereby independently controlling the opening and closing of each support plate 34 to complete the rotation and placement of filter plates 38 and the collection of old plates.

[0043] Reference Figure 6-7 According to some embodiments of the present invention, optionally, the sliding member 357 includes a sliding rod 3571, the sliding rod 3571 is fixedly connected to the pressing rod 358, one end of the sliding rod 3571 is provided with a groove 3572, a second spring 3574 is provided in the groove 3572, the second spring 3574 is connected to a sliding block 3573, and the sliding block 3573 is slidably connected to an X-shaped cross groove 356.

[0044] Specifically, when the pressing rod 358 is pressed inward, the sliding rod 3571 advances simultaneously, and the sliding block 3573 squeezes the second spring 3574 to retract and disengage from its original position, allowing it to slide freely along the X-shaped cross slide groove 356. This releases the rotation limit of the rotating rod 354. Then, after releasing the pressing rod 358, the second spring 3574 rebounds and pushes out the sliding block 3573, which then engages in any slide of the X-shaped cross slide groove 356 to complete self-locking. This stably locks the opening and closing angle of the support plate 34 without the need for additional manual locking, resulting in high reliability of the self-locking structure.

[0045] Reference Figure 4 According to some embodiments of the present invention, optionally, the dehumidifying cabinet 4 is provided with second mounting slots 41 on both sides, and a plurality of dehumidifying slots 42 are provided in the middle of the dehumidifying cabinet 4. A plurality of second connecting pipes 43 are installed in each of the second mounting slots 41. The second connecting pipes 43 are respectively connected to the two ends of the corresponding dehumidifying slots 42. A switching component 44 is installed between the second connecting pipe 43 on one side and the first connecting pipe 27, and between the second connecting pipe 43 on the other side and the third connecting pipe 5. A humidity sensor is installed in each of the dehumidifying slots 42.

[0046] Specifically, the dry air pretreated by the filter cabinet 21 is sent into the dehumidification cabinet 4 through the first connecting pipe 27. The switching component 44 can switch different dehumidification tanks 42 to connect to the airflow circuit. Each independent dehumidification tank 42 is filled with dehumidifying material. The humidity sensor collects the air humidity of the single tank in real time. When a certain dehumidification tank 42 is saturated and the humidity exceeds the standard, the switching component 44 automatically switches the airflow channel and introduces the air into the other dry dehumidification tanks 42 for continuous deep dehumidification. There is no need to stop the whole machine to replace the dehumidifying material, ensuring uninterrupted explosion-proof dehumidification of the transformer. The second connecting pipes 43 on both sides are responsible for the air intake and air outlet distribution functions, realizing the alternating and cyclical operation of multiple dehumidification tanks 42.

[0047] Reference Figure 9-10 According to some embodiments of the present invention, optionally, the switching assembly 44 includes a connecting box 441, the connecting box 441 being cylindrical, one end of the connecting box 441 being provided with connecting pipe ports 442 with equal spacing, the connecting pipe ports 442 being connected to corresponding second connecting pipes 43, the connecting box 441 being provided with a rotating plate 443, the outer wall of the rotating plate 443 being provided with toothed grooves 444, the toothed grooves 444 being meshed with gears 445, the gears 445 being driven by a motor 446, the rotating plate 443 being provided with openings 447 matching the connecting pipe ports 442, one end of the rotating plate 443 being provided with an extension pipe 448, the extension pipe 448 being rotatably connected to the second connecting pipe 43 and the third connecting pipe 5 respectively.

[0048] Specifically, the motor 446 drives the gear 445 to mesh with the outer tooth groove 444 of the rotating plate 443, which in turn drives the rotating plate 443 inside the cylindrical connecting box 441 to rotate. The opening 447 on the rotating plate 443 selectively aligns with different connecting pipe openings 442, switching the corresponding second connecting pipe 43 to achieve automatic switching of airflow between each moisture absorption tank 42. The extension pipe 448 adapts to the rotation of the rotating plate 443, keeping the pipeline sealed and leak-free throughout the process. Dry air can be stably delivered to the inside of the transformer. The entire switching process operates automatically without the need for manual adjustment of the pipeline.

[0049] Reference Figure 11According to some embodiments of the present invention, optionally, a pressing member 6 is provided on the outside of the pressing rod 358, the pressing member 6 including an electric telescopic rod 61 corresponding to the pressing rod 358, the electric telescopic rod 61 being mounted on the outer wall of the filter cabinet 21 via a support frame 62.

[0050] Specifically, under automated operation and maintenance conditions, there is no need for manual on-site pressing of the pressing rod 358. The electric telescopic rod 61 on the support frame 62 can automatically extend to press the pressing rod 358, compress the internal first spring 3581 to release the locking limit of the rotating rod 354, and remotely and automatically control the support plate 34 to flip and open, realizing the automatic rotation and placement of filter plates 38 and the automatic collection of old plates. It can be connected to the substation automation control system, reducing on-site manual operation and improving the level of automated operation and maintenance of explosion-proof equipment.

[0051] Reference Figure 3 and Figure 8 According to some embodiments of the present invention, optionally, the top of the third placement groove 32 is provided with a sealing plate 325, one side of the third placement groove 32 has a limiting groove 326, and the other side of the third placement groove 32 is provided with a third mounting groove 327. The third mounting groove 327 is connected to the sealing plate 325 by a torsion spring 328. The distance between the sealing plate 325 and the bottom support plate 34 of the second placement groove 31 is less than the length of the support plate 34. When the support plate 34 is flipped, it can press down the sealing plate 325.

[0052] Specifically, under normal conditions, the torsion spring 328 pushes the sealing plate 325 upward, and the sealing plate 325 seals the upper end of the third placement groove 32 to form a sealed structure. When the rotating component 35 drives the bottom support plate 34 of the second placement groove 31 to flip downward and open, the end of the support plate 34 presses down against the sealing plate 325, overcoming the elastic force of the torsion spring 328 and pressing the sealing plate 325 down and opening synchronously. The channels of the second placement layer 25 and the third placement layer 26 are completely connected, and the failed filter plate 38 can fall smoothly into the third placement groove 32. After the support plate 34 returns to its horizontal position and closes, the torsion spring 328 rebounds and drives the sealing plate 325 to close automatically, isolating the space above the third placement groove 32. The support plate 34 and the sealing plate 325 open and close in linkage, without the need to operate the sealing plate 325 separately, simplifying the filter plate 38 replacement operation.

[0053] Working principle: Normal dehumidification conditions (normal humidity inside room 1, equipment running continuously).

[0054] Humid outdoor air enters the room through the first ventilation window 12 at the bottom of the protective door 11 of the placement room 1, and then flows into the air inlet 22 of the filter cabinet 21. The air first passes through the corrugated filter screen 233 to intercept dust and impurities. The condenser rack 232, together with the condensation equipment 231, condenses and liquefies the water vapor in the air. The water droplets flow along the filter screen guide channel into the bottom drain trough 234 and are discharged through the drain outlet 235 with a one-way valve 236. The pre-treated air removes liquid water vapor in advance and enters the second placement layer 25. At this time, the top support plate 34 of the second placement trough 31 remains horizontal and closed, and the bottom support plate 34 is closed. An activated carbon filter plate 38 remains in the second placement trough 31 for continuous filtration. The bottom baffle of the filter plate 38 blocks the upper channel. All airflow passes through the effective filter plate 38 to complete coarse filtration and drying. The filtered air is sent into the dehumidification cabinet 4 through the first connecting pipe 27. The humidity sensor detects the air humidity in each dehumidification tank 42 in real time. The motor 446 drives the switching component 44 to rotate the plate 443 to switch the pipeline. The dehumidification tank 42 with sufficient adsorption capacity is automatically opened to deeply dehumidify the air. The dried air is introduced into the transformer through the third connecting pipe 5 to remove the water vapor accumulated in the winding and iron core. The exhaust fan 13 on the top of the placement room 1 continuously discharges the high temperature and high humidity exhaust gas in the room to maintain the explosion-proof ventilation environment. The exhaust fan 13 on the top of the placement room 1 is automatically started to quickly discharge the high temperature and high humidity mixed air in the room. Together with the first ventilation window 12 at the bottom, it forms convection ventilation, balances the air pressure inside the placement room 1, avoids the accumulation of hot and humid air and the resulting safety hazards, and meets the ventilation and heat dissipation requirements of the explosion-proof equipment.

[0055] Filter plate 38 rotation deployment condition (the current working filter plate 38 has been used for three months and needs to be replaced by a new filter plate 38).

[0056] The system detects that the current filter plate 38 has reached its service life, activates the electric telescopic rod 61 to press the pressing rod 358, compresses the first spring 3581, and drives the sliding part 357 to disengage from the X-shaped cross slide groove 356 to unlock the rotating rod 354; the rotating rod 354 is operated to flip the top support plate 34 of the second placement slot 31, and the spare filter plate 38 in the first placement slot 3 falls into the second placement slot 31 by its own weight and is put into operation. The bottom cover plate of the filter plate 38 automatically blocks the upper channel to prevent airflow from entering the storage area of ​​the idle filter plate 38. After releasing the pressing rod 358, the first spring 3581 rebounds, the sliding block 3573 is locked into the slide groove, and the support plate 34 is reset and closed. Throughout the process, the filter plate 38 is always in the filtration position and the dehumidification airflow channel is not interrupted.

[0057] Old filter plate 38 storage condition (after the new filter plate 38 is installed, the old filter plate 38 that has failed needs to be stored).

[0058] After the new filter plate 38 is in place and working stably, the rotating component 35 of the bottom support plate 34 is unlocked again by the electric telescopic rod 61, and the bottom support plate 34 of the second placement slot 31 is flipped downwards. During the flipping process, the end of the support plate 34 presses down on the sealing plate 325 at the top of the third placement slot 32, overcoming the elastic force of the torsion spring 328 to open the upper channel of the third placement slot 32. The old filter plate 38 that has reached the end of its service life falls down by its own weight and is stored in the second pull-out box 322 inside the third placement slot 32. After the support plate 34 is reset and closed, the torsion spring 328 rebounds and drives the sealing plate 325 to automatically seal the top of the third placement slot 32 to prevent air leakage. The four filter plates 38 are put in and stored in turn in turn. After all four are used up, they are cleaned in a unified manner. The whole system only needs to be replaced once a year.

[0059] Moisture Absorption Tank 42 Saturation Switching Condition (The humidity sensor in one of the moisture absorption tanks 42 detects that the humidity exceeds the standard, and the adsorption material is saturated.)

[0060] The humidity sensor collects the humidity data of the corresponding moisture absorption tank 42 in real time. When the value exceeds the standard and the adsorption is determined to be saturated, the controller starts the switching component 44 to drive the motor 446. The gear 445 meshes and drives the rotating plate 443 to rotate. The opening 447 on the rotating plate 443 switches to connect to the corresponding connection pipe 442 of the other unsaturated moisture absorption tanks 42. The airflow automatically switches to the dry moisture absorption tank 42 to continue deep dehumidification. The saturated moisture absorption tank 42 exits the working circuit. There is no need to stop the whole machine to replace the moisture absorption material, ensuring that the transformer dehumidifies continuously.

[0061] Replacement of all consumables for the whole machine (38 replacements of all filter plates and 4 replacements of the internal moisture-absorbing material of the desiccant cabinet in the annual process).

[0062] Before replacement, the control system starts the switching component 44 motor 446, which drives the rotating plate 443 inside the cylindrical connecting box 441 to rotate. The solid surface of the rotating plate 443 blocks the main air passage between the first connecting pipe 27 and the third connecting pipe 5, blocking the airflow between the filter cabinet 21, the dehumidifying cabinet 4, and the transformer, thus achieving segmented isolation and sealing. At this time, the consumable replacement operation can be carried out separately, and there will be no backflow of humid air into the transformer.

[0063] Replace filter plate 38: After the airflow channel is completely blocked and isolated by the rotating plate 443, pull out the handle of the first pull box 37 to remove the box, empty the old filter plate 38 in the box and fill it with a new filter plate 38, then pull out the second pull box 322 and remove all the accumulated failed filter plates 38 to complete the replacement of the entire batch of filter plates 38. After the replacement is completed, reset the two pull boxes.

[0064] Replace the moisture-absorbing material: After the airflow channel is closed, open the door of the moisture-absorbing cabinet 4 compartments separately, take out the saturated moisture-absorbing material in each moisture-absorbing tank 42 in turn, and fill it with brand new moisture-absorbing material. After all the replacements are completed, control the motor 446 to drive the rotating plate 443 to rotate and reset, and reopen the airflow channel. The equipment will then resume continuous dehumidification.

[0065] Equipment single overhaul and maintenance conditions (only a small number of spare filter plates are added, and local cleaning is performed).

[0066] After shutdown, open the protective door 11 of the placement room 1, pull the handle of the first pull box 37 outward, take out the box through the first pull port 36, fill it with a brand new activated carbon filter plate 38, and push it back to the first placement layer 24 to complete the replenishment of spare consumables; there is no need to block the main airflow, and the local operation does not affect the overall pipeline sealing.

[0067] It should be understood that the embodiments disclosed herein are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0068] The term "embodiment" in this specification refers to a specific feature or characteristic described in connection with an embodiment that is included in at least one embodiment of the invention. Therefore, phrases or "embodiments" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0069] Furthermore, the described features or characteristics can be incorporated into one or more embodiments in any other suitable manner. In the above description, specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented without the aforementioned specific details or using other methods, components, materials, etc.

Claims

1. A dehumidification device for explosion-proof transformers, characterized in that, include: The placement room (1) is equipped with protective doors (11) on all four sides. The lower part of the protective door (11) is equipped with a first ventilation window (12), and the upper part of the protective door (11) is equipped with an exhaust fan (13). The placement room (1) is equipped with a dehumidification device (2), which is connected to the transformer in the placement room (1) for dehumidification. The dehumidification device (2) includes a filter cabinet (21), one end of which is provided with an air inlet (22). A filter assembly (23) is provided in the air inlet (22). The filter cabinet (21) is provided with a first placement layer (24), a second placement layer (25), and a third placement layer (26) from top to bottom. The first placement layer (24), the second placement layer (25), and the third placement layer (26) are interconnected. The first placement layer (24), the second placement layer (25), and the third placement layer (26) are respectively provided with a first placement slot (3), a second placement slot (31), and a third placement slot (32). The two placement slots (31) are provided with a first mounting slot (33) at the top and bottom. The first mounting slot (33) is connected to a support plate (34). The first mounting slot (33) is provided with a rotating component. The rotating component is connected to the support plate (34). The first placement slot (3) is provided with a filter plate (38). The internal cavities of the second placement slot (31) are interconnected. The second placement layer (25) is connected to the air inlet (22). The other end is connected to a first connecting pipe (27). The first connecting pipe (27) is connected to the dehumidifying cabinet (4). The dehumidifying cabinet (4) is connected to the transformer through a third connecting pipe (5).

2. The explosion-proof transformer dehumidification device according to claim 1, characterized in that: The filter assembly (23) includes a condenser (231), which is installed in the filter cabinet (21). A condenser rack (232) is installed in the air inlet (22). The condenser rack (232) is connected to the condenser (231). The condenser rack (232) matches the air inlet (22). A filter screen (233) is provided in the condenser rack (232). The filter screen (233) is vertically arranged and wavy, forming a downward channel between them. A drain groove (234) is provided at the bottom of the air inlet (22). A drain outlet (235) is provided at the bottom of the drain groove (234). A one-way valve (236) is provided on the drain outlet (235).

3. The explosion-proof transformer dehumidification device according to claim 1, characterized in that: The first placement slot (3) has a first pull-out opening (36) on one side, and the first placement layer (24) has a matching first pull-out box (37) inside. The first pull-out box (37) has a first handle (39) on one side, and the first placement slot (3) is located inside the first placement layer (24).

4. The explosion-proof transformer dehumidification device according to claim 1, characterized in that: The third placement slot (32) has a second pull-out opening (321) on one side, and the third placement layer (26) has a matching second pull-out box (322) inside. The second pull-out box (322) has a second handle (323) on one side. The third placement slot (32) is located in the third placement layer (26), and the top of the third placement slot (32) has a sealing component (324).

5. The explosion-proof transformer dehumidification device according to claim 1, characterized in that: The rotating assembly includes a fixed rod (351), which is installed in a through groove (352) on one side of the first mounting groove (33). The fixed rod (351) has a rotating groove (353), and a rotating rod (354) is provided in the rotating groove (353). One end of the rotating rod (354) passes through the rotating groove (353) and is connected to the support plate (34). The other end of the rotating rod (354) is fitted with a limiting sleeve (355). The end face of the limiting sleeve (355) is provided with an X-shaped cross slide groove (356). A sliding member (357) is provided in the X-shaped cross slide groove (356). The sliding member (357) is connected to a pressing rod (358). A first spring (3581) is provided at the bottom of the pressing rod (358). The first spring (3581) is connected to the rotating rod (354). One end of the pressing rod (358) extends out of the filter cabinet (21).

6. The explosion-proof transformer dehumidification device according to claim 5, characterized in that: The sliding member (357) includes a sliding rod (3571), which is fixedly connected to the pressing rod (358). One end of the sliding rod (3571) is provided with a groove (3572), and a second spring (3574) is provided in the groove (3572). The second spring (3574) is connected to a sliding block (3573), and the sliding block (3573) is slidably connected to an X-shaped cross groove (356).

7. The explosion-proof transformer dehumidification device according to claim 1, characterized in that: The dehumidifying cabinet (4) has a second mounting slot (41) on both sides and a plurality of dehumidifying slots (42) in the middle. A plurality of second connecting pipes (43) are installed in each of the second mounting slots (41). The second connecting pipes (43) are connected to the two ends of the corresponding dehumidifying slots (42). A switching component (44) is installed between the second connecting pipe (43) on one side and the first connecting pipe (27) and the second connecting pipe (43) on the other side and the third connecting pipe (5). A humidity sensor is installed in each of the dehumidifying slots (42).

8. The explosion-proof transformer dehumidification device according to claim 7, characterized in that: The switching component (44) includes a connecting box (441), which is cylindrical. One end of the connecting box (441) is provided with connecting pipe ports (442) with the same spacing. The connecting pipe ports (442) are connected to the corresponding second connecting pipes (43). The connecting box (441) is provided with a rotating plate (443). The outer wall of the rotating plate (443) is provided with a toothed groove (444). The toothed groove (444) meshes with a gear (445). The gear (445) is driven by a motor (446). The rotating plate (443) is provided with an opening (447) that matches the connecting pipe port (442). One end of the rotating plate (443) is provided with an extension pipe (448). The extension pipe (448) is rotatably connected to the second connecting pipe (43) and the third connecting pipe (5) respectively.

9. The explosion-proof transformer dehumidification device according to claim 5, characterized in that: The pressing rod (358) is provided with a pressing component (6) on the outside. The pressing component (6) includes an electric telescopic rod (61) corresponding to the pressing rod (358). The electric telescopic rod (61) is installed on the outer wall of the filter cabinet (21) through a support frame (62).

10. The explosion-proof transformer dehumidification device according to claim 1, characterized in that: The third placement groove (32) is provided with a sealing plate (325) at the top. The third placement groove (32) has a limit groove (326) on one side and a third mounting groove (327) on the other side. The third mounting groove (327) is connected to the sealing plate (325) by a torsion spring (328). The distance between the sealing plate (325) and the bottom support plate (34) of the second placement groove (31) is less than the length of the support plate (34). When the support plate (34) is flipped, it can press down the sealing plate (325).

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