Oil-immersed power transformer

Abstract

The invention discloses an oil-immersed power transformer, and relates to the technical field of transformers, the oil-immersed power transformer comprises a cleaning mechanism and a transformer box body mounted in the cleaning mechanism, heat dissipation mechanisms are arranged on the two sides of the cleaning mechanism, a collecting water tank is arranged at the top of each heat dissipation mechanism, and the cleaning mechanism comprises a first support; a rotating gear is rotatably connected to one side of the top of the first support, a cleaning roller is fixedly connected to one side of the rotating gear, a second support is rotatably connected to one side of the cleaning roller, a fixing bolt is in threaded connection with the inner side of the bottom of the first support, and a positioning block is fixedly installed on the inner side of the bottom of the second support. Stubborn impurities can be cleaned through the cleaning scrapers on the two sides of the collecting box, meanwhile, the cleaning rake makes contact with the surface of the cleaning roller through the elastic force effect of the spring connected to the top of the cleaning support, impurities and attached dust on the surface of the cleaning roller are cleaned, and the cleaning effect of the cleaning roller is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, in particular to an oil-immersed power transformer. Background Art

[0002] A transformer is a static electrical device used to convert AC voltage and current to transmit AC power. Power transformers are essential equipment for power transmission and distribution, and power distribution to power users. Oil-immersed power transformers are designed to enhance insulation and cooling conditions. The transformer core and windings are immersed in a tank filled with transformer oil.

[0003] Publication No. CN114242389A discloses an oil-immersed power transformer, which comprises a transformer body, a sheave, a fixed block, a first cleaning plate, and a second cleaning plate. After the transformer body is installed, the sheave is rotated by wind power, and the sheave drives a sliding plate to slide back and forth along the fixed block. The sliding plate drives the first cleaning plate and the second cleaning plate into the cavity of the corrugated radiator and cleans the surface thereof, thereby preventing dust and other impurities from adhering to the surface of the corrugated radiator. This effectively avoids the problem of reduced heat dissipation effect of the corrugated radiator, prolongs the service life of the transformer body, and reduces the maintenance burden of the device on the staff. However, the following problems still exist in actual use of this patent: Although the oil-immersed power transformer can clean the cavity of the corrugated radiator through the first cleaning plate and the second cleaning plate, since the groove wheel needs to drive the sliding plate to move, the power source of the groove wheel comes from the fan blades, and it is impossible to ensure that the wind force is large enough for the fan blades to drive the groove wheel to rotate. At the same time, when the first cleaning plate and the second cleaning plate clean the cavity of the corrugated radiator, the up and down reciprocating cleaning method cannot completely clean the impurities and dust inside the cavity, and the impurities and dust will accumulate in the cavity or the first cleaning plate and the second cleaning plate, affecting the heat dissipation effect of the corrugated radiator.

[0004] Therefore, an oil-immersed power transformer is proposed to solve the above-mentioned problems. Summary of the Invention

[0005] The object of the present invention is to provide an oil-immersed power transformer to solve the problem raised in the above-mentioned background technology that since the groove wheel needs to drive the sliding plate to move, the power source of the groove wheel comes from the fan blades, and it is impossible to ensure that the wind force is large enough for the fan blades to drive the groove wheel to rotate. At the same time, when the first cleaning plate and the second cleaning plate clean the cavity of the corrugated radiator, the up and down reciprocating cleaning method cannot clean up the impurities and dust inside the cavity, and the impurities and dust will accumulate in the cavity or the first cleaning plate and the second cleaning plate, affecting the heat dissipation effect of the corrugated radiator.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: an oil-immersed power transformer, comprising a cleaning mechanism and a transformer housing; corrugated heat sinks are fixedly mounted on the front and back of the transformer housing; the cleaning mechanism comprises a plurality of cleaning units, each of which is arranged to be liftable between two adjacent fins of the corrugated heat sink; the cleaning unit comprises a first bracket, a second bracket, and a cleaning roller rotatably connected between the first bracket and the second bracket; The inner side of the bottom of the first bracket is threadedly connected with a fixing bolt, and the inner side of the bottom of the second bracket is fixedly installed with a positioning block; the outer side of the positioning block is snap-connected with a collection box, and the side of the collection box away from the positioning block is threadedly connected to the fixing bolt, and cleaning scrapers are symmetrically installed on both sides of the top of the collection box.

[0007] Preferably, a cleaning bracket is fixedly installed at the top center position of the collection box, a plurality of connecting springs are fixedly installed on the top of the cleaning bracket, a cleaning rake is fixedly connected to the top of the connecting spring, and the cleaning rake is arranged in close contact with the cleaning roller.

[0008] Preferably, a cleaning frame is fixedly installed on the outer side of the corrugated radiator, cleaning grooves are opened on both sides of the cleaning frame, and cleaning threaded rods are symmetrically provided on both sides of the cleaning frame; a sprocket limit cover is fixedly installed on the top of the cleaning frame, and a cleaning motor is fixedly installed on the inner side of the sprocket limit cover, and the cleaning motor is connected to the two cleaning threaded rods through a sprocket transmission assembly, and the outer sides of the two cleaning threaded rods are threadedly connected with cleaning threaded sleeves, and the outer sides of the two cleaning threaded sleeves are fixedly installed with connecting brackets, and the connecting bracket is fixedly connected to the first bracket.

[0009] Preferably, a rotating gear is rotatably connected to one side of the top of the first bracket, one side of the rotating gear is fixedly connected to the cleaning roller, and the side of the cleaning roller away from the first bracket is rotatably connected to the second bracket; a plurality of meshing racks extending in the vertical direction are fixedly installed inside the cleaning frame; the meshing racks are meshingly connected to the rotating gear.

[0010] Preferably, heat dissipation mechanisms are provided on both sides of the cleaning mechanism; the heat dissipation mechanism includes a heat dissipation box installed on one side of the transformer box, oil inlet holes are provided on both sides of the top of the transformer box, oil drain holes are provided on both sides of the bottom of the transformer box, an oil drain valve is fixedly installed at the center position of the bottom of the transformer box, an oil inlet pipe is fixedly installed on one side of the bottom of the heat dissipation box, and the oil inlet pipe is fixedly connected to the transformer box through the oil drain hole.

[0011] Preferably, a spiral heat dissipation tube is provided in the heat dissipation box; one end of the spiral heat dissipation tube is fixedly connected to the end of the oil inlet pipe, and a first elbow is fixedly installed on the other end of the spiral heat dissipation tube, and a switching sealing bracket is installed on the heat dissipation box; a plurality of filter elements are distributed circumferentially on the switching sealing bracket; the top of the first elbow abuts against one of the filter elements; a second elbow is provided above the switching sealing bracket at a position corresponding to the first elbow; the bottom of the second elbow abuts against the filter element, and an oil pump is fixedly installed on the top of the second elbow, and the oil pump is fixedly installed on the outside of the oil inlet hole.

[0012] Preferably, the bottom center position of the switching sealing bracket is rotatably connected to a switching rotating shaft, the bottom of the switching rotating shaft is fixedly installed with a switching bracket, the switching bracket is fixedly installed on the heat dissipation box, and a part of the switching sealing bracket extends out of the heat dissipation box.

[0013] Preferably, several pairs of rotating brackets are symmetrically installed on the inner side of the top of the heat dissipation box, and a first connecting shaft is rotatably connected between two of the rotating brackets in a pair, and a second connecting shaft is also connected to the side of one of the rotating brackets away from the first connecting shaft. Several rotating motors are fixedly installed on the front of the heat dissipation box, the output end of the rotating motor is fixedly connected to the second connecting shaft, the end of the second connecting shaft away from the rotating motor is fixedly connected to a rotating worm, and the end of the first connecting shaft away from the second connecting shaft is fixedly connected to a rotating worm; one side of the rotating worm is meshed with a rotating worm wheel, a water spray sleeve is fixedly installed inside the rotating worm wheel, a plurality of inclined nozzles are fixedly installed on the outside of the water spray sleeve, and rotating fan blades are fixedly installed on the outside of the water spray sleeve.

[0014] Preferably, a collecting water tank is provided on the top of the heat dissipation mechanism, a through hole is provided on the inner side of the bottom of the heat dissipation box, a cooling box is fixedly installed on the bottom of the heat dissipation box, a circulating water pipe is fixedly installed on one side of the cooling box, a circulating water pump is fixedly installed on the end of the circulating water pipe, the collecting water tank is fixedly installed on the top of the heat dissipation box, a water tank plug is threadedly connected to one side of the top of the collecting water tank, the collecting water tank is rotatably connected to the water spray sleeve, and a plurality of heat dissipation holes are provided on the top front of the heat dissipation box.

[0015] Preferably, a sealing cover plate is fixedly mounted on the top of the transformer box, an oil pillow is fixedly mounted on one side of the top of the sealing cover plate, and a plurality of bushings are fixedly mounted on the top of the sealing cover plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the oil-immersed power transformer can clean stubborn impurities by means of cleaning scrapers on both sides of the collection box, and at the same time, the elastic force of the spring connected to the top of the cleaning bracket is utilized to make the cleaning rake contact with the surface of the cleaning roller, thereby cleaning impurities and adhered dust on the surface of the cleaning roller, thereby improving the cleaning effect of the cleaning roller, and the sealing layer on the surface of the switching sealing bracket is utilized to seal the first elbow and the second elbow to avoid oil leakage, and the filter element can be replaced without stopping the machine by switching, thereby improving the service life of the transformer. The specific contents are as follows: 1. By setting a cleaning mechanism, not only can the cleaning motor drive the sprocket transmission assembly and the cleaning threaded rod to rotate, so that the cleaning threaded sleeve drives the connecting bracket and the first bracket to move up and down, but also the rotating gear is engaged with the meshing rack, so that the rotating gear drives the cleaning roller to rotate, and the cleaning roller can clean the gap of the corrugated radiator; when the connecting bracket is lowered, the cleaning roller rotates clockwise, and the dust and impurities on the right side of the cleaning roller can be cleaned into the collection box at the bottom; when the connecting bracket is raised, the cleaning roller rotates counterclockwise, and the dust and impurities on the left side of the cleaning roller can be cleaned into the collection box at the bottom; the cleaning scrapers on both sides of the collection box can clean stubborn impurities; at the same time, the elastic force of the spring connected to the top of the cleaning bracket is used to make the cleaning rake contact with the surface of the cleaning roller, clean the impurities and adhered dust on the surface of the cleaning roller, and improve the cleaning effect of the cleaning roller; when it is necessary to clean the impurities and dust inside the collection box, the collection box is moved to the bottom of the corrugated radiator, the fixing bolt is loosened, and the collection box is taken out from the outside of the positioning block, so as to clean the dust and impurities inside the collection box; 2. By setting up the heat dissipation mechanism, not only can the transformer oil inside the transformer box be drawn into the spiral heat dissipation pipe from the oil inlet pipe by using the oil pump, but the circulating water pump can also be started to pump the cooling water inside the cooling box into the collection water tank through the circulating water pipe, and sprayed out from the inclined nozzle through the water spray sleeve. The structural characteristics of the inclined nozzle can be used to spray and dissipate heat on the bottom of the spiral heat dissipation pipe. Under the action of gravity, the water flow falls from top to bottom to the top of the bottom spiral heat dissipation pipe, thereby achieving comprehensive cooling of the spiral heat dissipation pipe. The rotating motor is started to drive the second connecting shaft and the rotating worm to rotate, and the first connecting shaft is used to drive the rotating worm on the other side to rotate. The meshing connection between the rotating worm and the rotating worm wheel can be used to realize the rotation of the water spray sleeve, so that the water spray sleeve drives the inclined nozzle and the rotating The fan blades rotate, and the tilted nozzles are used to achieve all-round water sprinkling and cooling. At the same time, the fan blades rotate to generate a certain amount of wind force, which cools the cooling water and the spiral heat dissipation pipes through the wind force, thereby improving the heat dissipation effect of the spiral heat dissipation pipes. The accumulated cooling water can be stirred by the tilted nozzles to improve the mixing efficiency of the cooling water, thereby improving the cooling effect of the transformer oil. The filter element can be used to filter impurities inside the transformer oil. When the filter element is blocked, the filter element can be switched by rotating the switching sealing bracket. The sealing layer on the surface of the switching sealing bracket is used to seal the first elbow and the second elbow to avoid oil leakage. The filter element can be replaced without stopping the machine by switching, thereby increasing the service life of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 Schematic diagram of the three-dimensional structure of the cleaning mechanism of the present invention; Figure 3 Schematic diagram of the three-dimensional structure of the corrugated radiator in the present invention; Figure 4 Schematic diagram of the three-dimensional structure of the meshing rack in the present invention; Figure 5 This is a schematic diagram of the three-dimensional cross-sectional structure of the collection box in the present invention; Figure 6 Schematic diagram of the three-dimensional structure of the heat dissipation mechanism in the present invention; Figure 7 This is a schematic diagram of the three-dimensional cross-sectional structure of the heat dissipation box in the present invention; Figure 8 Schematic diagram of the three-dimensional structure of the spiral heat dissipation pipe in the present invention; Figure 9 A schematic diagram of the three-dimensional structure of the switchable sealing bracket in the present invention; Figure 10 Schematic diagram of the three-dimensional structure of the tilting nozzle and rotating fan blades in the present invention; Figure 11It is a schematic diagram of the three-dimensional structure of the rotating worm gear in the present invention.

[0018] In the figure: 1. Cleaning mechanism; 101. First bracket; 102. Rotating gear; 103. Cleaning roller; 104. Second bracket; 105. Fixing bolt; 106. Positioning block; 107. Collecting box; 108. Cleaning scraper; 109. Cleaning bracket; 110. Connecting spring; 111. Cleaning rake; 112. Transformer box; 113. Oil inlet hole; 114. Oil drain hole; 115. Oil drain valve; 116. Mounting base; 117. Corrugated radiator; 118. Cleaning frame; 119. Cleaning chute; 120. Engaging rack; 121. Sprocket limit cover; 122. Cleaning motor; 123. Sprocket transmission assembly; 124. Cleaning threaded rod; 125. Cleaning threaded sleeve; 126. Connecting bracket; 127. Sealing cover ;128. Oil pillow;129. Sleeve;2. Heat dissipation mechanism;201. Heat dissipation box;202. Oil inlet pipe;203. Spiral heat dissipation pipe;204. First bend pipe;205. Filter element;206. Switching sealing bracket;207. Switching rotating shaft;208. Switching bracket;209. Second bend pipe;210. Oil pump;211. Rotating bracket;212. First connecting shaft;213. Rotating motor;214. Second connecting shaft;215. Rotating worm;216. Rotating worm gear;217. Water spray sleeve;218. Tilted nozzle;219. Rotating fan blade;220. Through hole;221. Cooling box;222. Circulating water pipe;223. Circulating water pump;224. Collecting water tank;225. Water tank plug;226. Heat dissipation hole. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 5The present invention provides a technical solution: an oil-immersed power transformer, comprising a cleaning mechanism 1, and a transformer box 112 installed inside the cleaning mechanism 1, heat dissipation mechanisms 2 are provided on both sides of the cleaning mechanism 1, and a water collection tank 224 is provided on the top of the heat dissipation mechanism 2, the cleaning mechanism 1 comprises a first bracket 101, a top side of the first bracket 101 is rotatably connected to a rotating gear 102, a side of the rotating gear 102 is fixedly connected to a cleaning roller 103, and a side of the cleaning roller 103 is rotatably connected to a second bracket 104, wherein a fixing bolt 105 is threadedly connected to the inner side of the bottom of the first bracket 101, and a positioning block 106 is fixedly installed on the inner side of the bottom of the second bracket 104, wherein the outer side of the positioning block 106 is engaged with a collection box 107 (specifically, a positioning groove is provided at the corresponding position of the collection box 107, and the positioning block 106 is inserted into the positioning groove by inserting the positioning block 106 into the positioning groove). The groove realizes the snap connection between the two), the fixing bolt 105 is threadedly connected to the collection box 107, so that the collection box 107 is fixedly installed between the first bracket 101 and the second bracket 104, and the second bracket 104 is slidably connected to the corrugated radiator 117 on the side away from the cleaning roller 103. The cleaning motor 122 is used to drive the sprocket transmission assembly 123 and the cleaning threaded rod 124 to rotate, so that the cleaning threaded sleeve 125 drives the connecting bracket 126 and the first bracket 101 to move up and down. The rotating gear 102 is engaged with the meshing rack 120, so that the rotating gear 102 drives the cleaning roller 103 to rotate, and the cleaning roller 103 can clean the gap in the corrugated radiator 117. When the connecting bracket 126 descends, the cleaning roller 103 rotates clockwise, and the dust and impurities on the right side of the cleaning roller 103 can be cleaned into the collection box 107 at the bottom.

[0021] See also Figure 3-Figure 4 The collection box 107 is threadedly connected to the fixing bolt 105, and cleaning scrapers 108 are symmetrically installed on both sides of the top of the collection box 107. A cleaning bracket 109 is fixedly installed at the center position of the top of the collection box 107. Several connecting springs 110 are fixedly installed on the top of the cleaning bracket 109, and a cleaning rake 111 is fixedly connected to the top of the connecting spring 110. The cleaning rake 111 is fitted with the cleaning roller 103. When the connecting bracket 126 rises, the cleaning roller 103 rotates counterclockwise, which can clean the dust and impurities on the left side of the cleaning roller 103 into the collection box 107 at the bottom. The cleaning scrapers 108 on both sides of the collection box 107 can clean stubborn impurities. At the same time, the elastic force of the connecting spring 110 on the top of the cleaning bracket 109 is used to make the cleaning rake 111 contact with the surface of the cleaning roller 103, cleaning the impurities and adhered dust on the surface of the cleaning roller 103, thereby improving the cleaning effect of the cleaning roller 103.

[0022] See also Figure 2-Figure 5The transformer box 112 has oil inlet holes 113 on both sides of the top, and oil drain holes 114 on both sides of the bottom. An oil drain valve 115 is fixedly installed at the center of the bottom of the transformer box 112. A mounting base 116 is fixedly installed at the bottom of the transformer box 112. A corrugated radiator 117 is fixedly installed on the front and back of the transformer box 112. A cleaning frame 118 is fixedly installed on the outside of the corrugated radiator 117. Cleaning chutes 119 are opened on both sides of the cleaning frame 118. 18 is fixedly installed with a plurality of meshing racks 120 extending in the vertical direction, a sprocket limiting cover 121 is fixedly installed on the top of the cleaning frame 118, a cleaning motor 122 is fixedly installed on one side of the inner side of the sprocket limiting cover 121, the output end of the cleaning motor 122 is fixedly connected to a sprocket transmission assembly 123 (including two sprockets and a chain connected to the two sprockets, and the output end of the cleaning motor 122 is connected to one of the sprockets), and a cleaning threaded rod 124 extending in the vertical direction is symmetrically installed at the bottom of the sprocket transmission assembly 123. The cleaning threaded rod 124 is connected to the two sprockets respectively. The outer sides of the two cleaning threaded rods 124 are threadedly connected with cleaning threaded sleeves 125. The cleaning threaded sleeves 125 are slidably connected to the cleaning chute 119 to limit the cleaning threaded sleeves 125. The outer sides of the two cleaning threaded sleeves 125 are fixedly installed with a connecting bracket 126 extending in the horizontal direction. The connecting bracket 126 is fixedly connected to the outer side of the first bracket 101. The meshing rack 120 is meshed with the rotating gear 102. The top of the transformer box 112 is fixedly installed with a sealing cover plate 127. An oil pillow 128 is fixedly installed on one side of the top of the sealing cover 127, and several sleeves 129 are fixedly installed on the top of the sealing cover 127. When it is necessary to clean the impurities and dust inside the collection box 107, the collection box 107 is moved to the bottom of the corrugated radiator 117, the fixing bolts 105 are loosened, and the collection box 107 is removed from the outside of the positioning block 106, and then taken out from the slot reserved between the heat dissipation plate of the corrugated radiator 117 and the cleaning frame 118, so as to clean the dust and impurities inside the collection box 107.

[0023] It should be noted that the cleaning mechanism 1 includes a plurality of cleaning units ( Figure 5 As shown in the figure, a cleaning unit is set between two adjacent heat sinks of the corrugated heat sink 117. The multiple cleaning units are driven by the same driving member (cleaning motor 122), that is, the lifting and lowering of all cleaning units on one side of the transformer box 112 and the rotation of all cleaning rollers 103 are driven by one power source.

[0024] See also Figure 1-Figure 2 、 Figure 6The heat dissipation mechanism 2 includes a heat dissipation box 201, which is symmetrically mounted on both sides of the transformer box 112. An oil inlet pipe 202 is fixedly mounted on one side of the bottom of the heat dissipation box 201. The oil inlet pipe 202 is fixedly connected to the transformer box 112 through the oil drain hole 114. The end of the oil inlet pipe 202 is fixedly connected to a spiral heat dissipation pipe 203. The spiral heat dissipation pipe 203 is located inside the heat dissipation box 201. A first elbow 204 is fixedly mounted on the top of the spiral heat dissipation pipe 203. The top of the first elbow 204 is tightly abutted against the bottom of one of the filter elements 205. The outer side of the filter element 205 is snap-connected with a switching sealing bracket 206. The switching sealing bracket 206 is disc-shaped, and a plurality of filter elements 205 are evenly mounted on it along the circumference. The filter element 205 is detachably connected to the switching sealing bracket 206. The filter element 205 is a prior art, and a spring sealing structure is arranged inside it. A spring is arranged at the bottom of the sealing ring, and the elastic force compensation of the spring is used to achieve the sealing effect. The single spring mechanical sealing structure has a low cost and is suitable for small diameter and low speed scenes. It can realize the sealing connection between the sealing mechanism and the first elbow 204 and the second elbow 209 without affecting the switching of the filter element 205. The bottom center position of the switching sealing bracket 206 is rotatably connected to the switching rotating shaft 207, and the bottom of the switching rotating shaft 207 is fixedly installed with a switching bracket 208. The switching bracket 208 is fixedly installed on the heat dissipation box 201, and a part of the switching sealing bracket 206 is located at the heat dissipation box 201, a part of it extends to the outside of the heat sink 201, and relative rotation with the heat sink 201 is achieved by switching the rotating shaft 207. A second elbow 209 is provided above the switching sealing bracket 206 and at a position relative to the first elbow 204. The bottom of the second elbow 209 is tightly abutted against the top of the filter element 205, that is, the first elbow 204 and the second elbow 209 are simultaneously abutted against both sides of the same filter element 205 to achieve communication between the two through the same filter element 205. The filter element 205 can filter impurities inside the transformer oil. When the filter element 205 is blocked or at a set time interval, the sealing bracket 206 is rotated to switch the part extending to the outside of the heat sink 201, and is switched at the time of the switch. Under the action of the rotating shaft 207 and the switching bracket 208, the switching sealing bracket 206 is rotated inside the heat sink 201, so that the filter element 205 can be switched, that is, the filter element to be replaced is rotated to the outside of the heat sink 201 for replacement. At this time, the first elbow 204 and the second elbow 209 are simultaneously in contact with another new filter element 205. A sealing layer is provided on the upper and lower surfaces of the switching sealing bracket 206. The sealing layer is made of elastic material, for example. During the switching process, the first elbow 204 and the second elbow 209 squeeze the corresponding sealing layer to increase the sealing performance. The sealing layer on the surface of the switching sealing bracket 206 is used to seal the first elbow 204 and the second elbow 209 to avoid oil leakage. In addition,Alternatively, a connecting groove may be provided between the mounting positions of two adjacent filter cartridges 205, and a sealing ring may be provided in the connecting groove to form a sliding seal. During the switching process, the first elbow 204 and the second elbow 209 slide through the corresponding connecting groove to the other filter cartridge 205. By switching, the filter cartridge 205 can be quickly replaced without stopping the machine or during a short shutdown, thereby increasing the service life of the transformer. The filter cartridge 205 is a prior art, and a spring sealing structure is provided inside it. A spring is provided at the bottom of the sealing ring, and the elastic force compensation of the spring is used to achieve a sealing effect. The single-spring mechanical seal structure has a low cost and is suitable for small diameter and low speed scenarios. It can achieve a sealed connection between the sealing mechanism and the first elbow 204 and the second elbow 209 without affecting the switching of the filter cartridge 205.

[0025] See also Figures 8-10 , an oil pump 210 is fixedly installed on the top of the second elbow 209, and the oil pump 210 is fixedly installed on the outside of the oil inlet hole 113. Several pairs of rotating brackets 211 are installed on the inner side of the top of the heat sink 201, and a first connecting shaft 212 is rotatably connected between two rotating brackets 211 that are a pair of each other. A plurality of rotating motors 213 are fixedly installed on the front of the heat sink 201. The number of rotating motors 213 is equal to the number of pairs of rotating brackets 211, and each rotating motor 213 corresponds to a pair of rotating brackets 211. The output end of the rotating motor 213 is fixedly connected to a second connecting shaft 214, and the second connecting shaft 214 and the first connecting shaft 212 are located on the same straight line. The end of the second connecting shaft 214 away from the rotating motor 213 is fixedly connected to a rotating worm 215, and the rotating worm 215 is installed on one of the rotating brackets 211, and the end of the first connecting shaft 212 away from the second connecting shaft 214 is fixedly connected to the rotating worm 215. The rotating worm 215 is installed on another rotating bracket 211, and one side of each rotating worm 215 is meshed with a rotating worm gear 216. The rotating worm gear 216 is rotatably installed on the inner side of the top of the heat dissipation box 201. A water spray sleeve 217 is fixedly installed inside the rotating worm gear 216, and a plurality of inclined nozzles 218 are fixedly installed on the outer side of the water spray sleeve 217. The oil pump 210 is used to pump the transformer oil inside the transformer box 112 from the oil inlet pipe 202 into the spiral heat dissipation pipe 203, and the circulating water pump 223 is started to pump the cooling water inside the cooling box 221 into the collection water tank 224 through the circulating water pipe 222, and spray it out from the inclined nozzle 218 through the water spray sleeve 217. The structural characteristics of the inclined nozzle 218 can be used to spray and dissipate heat to the bottom of the spiral heat dissipation pipe 203. Under the action of gravity, the water flows from top to bottom and falls to the top of the bottom spiral heat dissipation pipe 203, thereby achieving comprehensive cooling of the spiral heat dissipation pipe 203.

[0026] See also Figures 8-11, a rotating fan blade 219 is also fixedly installed on the outside of the water spray sleeve 217, a through hole 220 is opened on the inner side of the bottom of the heat dissipation box 201, a cooling box 221 is fixedly installed on the bottom of the heat dissipation box 201, a circulating water pipe 222 is fixedly installed on one side of the cooling box 221, and a circulating water pump 223 is fixedly installed on the end of the circulating water pipe 222. The circulating water pump 223 is installed on one side of the collecting water tank 224 and is connected with its interior. The collecting water tank 224 is fixedly installed on the top of the heat dissipation box 201, and a water tank plug 225 is threadedly connected to the top side of the collecting water tank 224. The collecting water tank 224 is rotatably connected to the water spray sleeve 217, and the direction of the rotating axis is vertical. A plurality of heat dissipation holes 226 are opened on the top front of the heat dissipation box 201. The rotating motor 213 is started to drive the second connecting shaft 214 and the rotating The worm 215 rotates, and the first connecting shaft 212 is used to drive the rotating worm 215 on the other side to rotate. The meshing connection between the rotating worm 215 and the rotating worm wheel 216 is used to realize the rotation of the water spray sleeve 217, so that the water spray sleeve 217 drives the inclined nozzle 218 and the rotating fan blade 219 to rotate, and the inclined nozzle 218 is used to achieve all-round water sprinkling and cooling. The water sprayed by the inclined nozzle 218 finally flows into the cooling box 221 through the through hole 220. At the same time, the rotating fan blade 219 rotates to generate a certain wind force, which is used to cool the cooling water and the spiral heat dissipation pipe 203, thereby improving the heat dissipation effect of the spiral heat dissipation pipe 203. The accumulated cooling water can be stirred by the inclined nozzle 218 to improve the mixing efficiency of the cooling water, thereby improving the cooling effect of the transformer oil.

[0027] Working principle: Before using this oil-immersed power transformer, you need to check the overall condition of the device to make sure it can work normally. Figure 1 - Figure 11 As shown, first, the cleaning motor 122 is used to drive the sprocket transmission assembly 123 and the cleaning threaded rod 124 to rotate, so that the cleaning threaded sleeve 125 drives the connecting bracket 126 and the first bracket 101 to move up and down, and the rotating gear 102 is engaged with the meshing rack 120 to drive the cleaning roller 103 to rotate, and the gap of the corrugated radiator 117 can be cleaned by the cleaning roller 103. When the connecting bracket 126 descends, the cleaning roller 103 rotates clockwise, and the dust and impurities on the right side of the cleaning roller 103 can be cleaned into the collection box 107 at the bottom. When the connecting bracket 126 rises, the cleaning roller 103 rotates counterclockwise, and the dust and impurities on the left side of the cleaning roller 103 can be cleaned into the collection box 107 at the bottom.

[0028] Secondly, the cleaning scrapers 108 on both sides of the collection box 107 can clean up stubborn impurities, and at the same time, the elastic force of the spring 110 connected to the top of the cleaning bracket 109 is used to make the cleaning rake 111 contact the surface of the cleaning roller 103, and clean up the impurities and adhered dust on the surface of the cleaning roller 103, thereby improving the cleaning effect of the cleaning roller 103. When it is necessary to clean the impurities and dust inside the collection box 107, the collection box 107 is moved to the bottom of the corrugated radiator 117, the fixing bolts 105 are loosened, and the collection box 107 is taken out from the outside of the positioning block 106, thereby cleaning the collection box 107. 7, the dust and impurities inside are cleaned, and the transformer oil inside the transformer box 112 is pumped from the oil inlet pipe 202 into the spiral heat dissipation pipe 203 by using the oil pump 210. The circulating water pump 223 is started to pump the cooling water inside the cooling box 221 into the collection water tank 224 through the circulating water pipe 222, and the cooling water is sprayed from the inclined nozzle 218 through the water spray sleeve 217. The structural characteristics of the inclined nozzle 218 can be used to spray and dissipate heat on the bottom of the spiral heat dissipation pipe 203. Under the action of gravity, the water flows from top to bottom and falls to the top of the bottom spiral heat dissipation pipe 203, thereby achieving comprehensive cooling of the spiral heat dissipation pipe 203.

[0029] Finally, the rotating motor 213 is started to drive the second connecting shaft 214 and the rotating worm 215 to rotate, and the first connecting shaft 212 is used to drive the rotating worm 215 on the other side to rotate. The characteristics of the meshing connection between the rotating worm 215 and the rotating worm wheel 216 can be used to realize the rotation of the water spray sleeve 217, so that the water spray sleeve 217 drives the inclined nozzle 218 and the rotating fan blade 219 to rotate. The inclined nozzle 218 is used to achieve all-round water spraying and cooling. At the same time, the rotating fan blade 219 rotates to generate a certain amount of wind force, which is used to cool the cooling water and the spiral heat pipe 203, thereby improving the heat dissipation efficiency of the spiral heat pipe 203. As a result, the accumulated cooling water can be stirred by tilting the nozzle 218, the mixing efficiency of the cooling water can be improved, thereby improving the cooling effect of the transformer oil, and the impurities inside the transformer oil can be filtered by using the filter element 205. When the filter element 205 is blocked, the filter element 205 can be switched by rotating the switching sealing bracket 206, and the first bend 204 and the second bend 209 are sealed by the sealing layer on the surface of the switching sealing bracket 206 to avoid oil leakage. The filter element 205 can be replaced without stopping the machine by switching, thereby improving the service life of the transformer.

[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An oil-immersed power transformer, characterized in that: The invention comprises a cleaning mechanism (1) and a transformer box (112); a corrugated radiator (117) is fixedly mounted on the front and back of the transformer box (112); the cleaning mechanism (1) comprises a plurality of cleaning units, and a lifting cleaning unit is provided between two adjacent radiating fins of the corrugated radiator (117); the cleaning unit comprises a first bracket (101), a second bracket (104), and a cleaning roller (103) rotatably connected between the first bracket (101) and the second bracket (104); The inner side of the bottom of the first bracket (101) is threadedly connected to a fixing bolt (105), and the inner side of the bottom of the second bracket (104) is fixedly installed with a positioning block (106); the outer side of the positioning block (106) is snap-connected with a collection box (107), and the side of the collection box (107) away from the positioning block (106) is threadedly connected to the fixing bolt (105), and cleaning scrapers (108) are symmetrically installed on both sides of the top of the collection box (107).

2. The oil-immersed power transformer according to claim 1, characterized in that: A cleaning bracket (109) is fixedly mounted at the center of the top of the collection box (107), a plurality of connecting springs (110) are fixedly mounted on the top of the cleaning bracket (109), a cleaning rake (111) is fixedly connected to the top of the connecting spring (110), and the cleaning rake (111) is arranged in close contact with the cleaning roller (103).

3. The oil-immersed power transformer according to claim 2, characterized in that: A cleaning frame (118) is fixedly mounted on the outer side of the corrugated heat sink (117), and cleaning chutes (119) are provided on both sides of the cleaning frame (118). Cleaning threaded rods (124) are symmetrically provided on both sides of the cleaning frame (118); a sprocket limiting cover (121) is fixedly mounted on the top of the cleaning frame (118), and a cleaning motor (122) is fixedly mounted on one side of the inner side of the sprocket limiting cover (121). The cleaning motor (122) is connected to the two cleaning threaded rods (124) through a sprocket transmission assembly (123). The outer sides of the two cleaning threaded rods (124) are both threadedly connected to cleaning threaded sleeves (125). A connecting bracket (126) is fixedly mounted on the outer sides of the two cleaning threaded sleeves (125), and the connecting bracket (126) is fixedly connected to the first bracket (101).

4. The oil-immersed power transformer according to claim 3, characterized in that: A rotating gear (102) is rotatably connected to one side of the top of the first bracket (101), one side of the rotating gear (102) is fixedly connected to the cleaning roller (103), and a side of the cleaning roller (103) away from the first bracket (101) is rotatably connected to the second bracket (104); a plurality of meshing racks (120) extending in a vertical direction are fixedly installed inside the cleaning frame (118); the meshing racks (120) are meshedly connected to the rotating gear (102).

5. The oil-immersed power transformer according to claim 4, characterized in that: Both sides of the cleaning mechanism (1) are provided with heat dissipation mechanisms (2); the heat dissipation mechanism (2) comprises a heat dissipation box (201) mounted on one side of the transformer box (112); both sides of the top of the transformer box (112) are provided with oil inlet holes (113); both sides of the bottom of the transformer box (112) are provided with oil drain holes (114); an oil drain valve (115) is fixedly mounted at the center of the bottom of the transformer box (112); an oil inlet pipe (202) is fixedly mounted on one side of the bottom of the heat dissipation box (201); and the oil inlet pipe (202) is fixedly connected to the transformer box (112) through the oil drain holes (114).

6. The oil-immersed power transformer according to claim 5, characterized in that: A spiral heat dissipation pipe (203) is provided in the heat dissipation box (201); one end of the spiral heat dissipation pipe (203) is fixedly connected to the end of the oil inlet pipe (202); a first elbow (204) is fixedly installed on the other end of the spiral heat dissipation pipe (203); a switching sealing bracket (206) is installed on the heat dissipation box (201); a plurality of filter elements (205) are distributed along the circumference of the switching sealing bracket (206); the top of the first elbow (204) abuts against one of the filter elements (205); a second elbow (209) is provided above the switching sealing bracket (206) at a position corresponding to the first elbow (204); the bottom of the second elbow (209) abuts against the filter element (205); an oil pump (210) is fixedly installed on the top of the second elbow (209); the oil pump (210) is fixedly installed on the outside of the oil inlet hole (113).

7. The oil-immersed power transformer according to claim 6, characterized in that: The switching sealing bracket (206) is rotatably connected to a switching rotating shaft (207) at the bottom center thereof, a switching bracket (208) is fixedly mounted on the bottom of the switching rotating shaft (207), the switching bracket (208) is fixedly mounted on the heat dissipation box (201), and a portion of the switching sealing bracket (206) extends outside the heat dissipation box (201).

8. The oil-immersed power transformer according to claim 7, characterized in that: Several pairs of rotating brackets (211) are symmetrically mounted on the inner side of the top of the heat dissipation box (201), and a first connecting shaft (212) is rotatably connected between two of the rotating brackets (211) in a pair, and a second connecting shaft (214) is further connected to the side of one of the rotating brackets (211) away from the first connecting shaft (212). Several rotating motors (213) are fixedly mounted on the front side of the heat dissipation box (201), and the output end of the rotating motor (213) is fixedly connected to the second connecting shaft (214), and the second connecting shaft (214) is further away from the first connecting shaft (212). A rotating worm (215) is fixedly connected to the end away from the rotating motor (213), and an end of the first connecting shaft (212) away from the second connecting shaft (214) is fixedly connected to the rotating worm (215); one side of the rotating worm (215) is meshedly connected to a rotating worm wheel (216), a water spray sleeve (217) is fixedly installed inside the rotating worm wheel (216), a plurality of inclined spray heads (218) are fixedly installed on the outside of the water spray sleeve (217), and a rotating fan blade (219) is fixedly installed on the outside of the water spray sleeve (217).

9. The oil-immersed power transformer according to claim 8, characterized in that: A collecting water tank (224) is provided on the top of the heat dissipation mechanism (2), a through hole (220) is provided on the inner side of the bottom of the heat dissipation box (201), a cooling box (221) is fixedly installed on the bottom of the heat dissipation box (201), a circulating water pipe (222) is fixedly installed on one side of the cooling box (221), a circulating water pump (223) is fixedly installed on the end of the circulating water pipe (222), the collecting water tank (224) is fixedly installed on the top of the heat dissipation box (201), a water tank plug (225) is threadedly connected to one side of the top of the collecting water tank (224), the collecting water tank (224) is rotatably connected to the water spray sleeve (217), and a plurality of heat dissipation holes (226) are provided on the front side of the top of the heat dissipation box (201).

10. The oil-immersed power transformer according to claim 1, characterized in that: A sealing cover plate (127) is fixedly mounted on the top of the transformer box (112), an oil pillow (128) is fixedly mounted on one side of the top of the sealing cover plate (127), and a plurality of bushings (129) are fixedly mounted on the top of the sealing cover plate (127).

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