Oil-immersed transformer facilitating maintenance of oil

Abstract

The application provides an oil-immersed transformer convenient for oil maintenance, which comprises a transformer and an oil circulation mechanism, wherein the oil circulation mechanism is installed on the transformer; the oil circulation mechanism comprises an oil storage tank, an oil filter assembly, an oil supply component, a sedimentation mechanism and an oil outlet pipe; the oil storage tank is connected with the transformer through a connecting support; the oil supply component is arranged between the transformer and the oil storage tank; the oil filter assembly comprises a flow guide component and a filter component; the flow guide component is arranged in the interior of the oil storage tank and is arranged away from the oil supply component; the filter component is movably connected in the interior of the oil storage tank and is located on one side of the flow guide component; one end of the oil storage tank is provided with a plug cover assembly which is connected with the filter component. The oil-immersed transformer convenient for oil maintenance can realize purification treatment in the process of transformer oil circulation, avoids long-term storage of impurities in the transformer, is convenient to maintain and has high purification efficiency.

Description

Technical Field

[0001] This application relates to the field of oil-immersed transformer technology, and more particularly to an oil-immersed transformer that is easy to maintain. Background Technology

[0002] Transformer oil is the "blood" of a transformer, performing core functions of insulation and cooling. During use, the oil deteriorates due to the intrusion of moisture, oxygen, and impurities, leading to decreased insulation strength, reduced heat dissipation, and potential corrosion of internal components. Maintenance procedures can promptly remove these hazards, restore oil quality, thereby ensuring the safe operation of the transformer, preventing internal faults, and significantly extending its service life.

[0003] Current transformer oil purification technologies based on periodic maintenance typically employ high-pressure pumps to force the oil into filtration equipment. This approach has significant drawbacks: First, impurities and sludge accumulate inside the transformer over a long period, tending to settle at the bottom and proving difficult to remove; second, during centralized treatment, the filtration system faces high-pressure challenges, resulting in high energy consumption and a significant risk of filter element clogging, thus affecting purification efficiency. Summary of the Invention

[0004] This application aims to at least partially solve one of the technical problems in the aforementioned technologies.

[0005] Therefore, one objective of this application is to provide an oil-immersed transformer that is easy to maintain, capable of purification during transformer oil circulation, preventing impurities from accumulating in the transformer for a long time, and is easy to maintain with high purification efficiency.

[0006] To achieve the above objectives, a first aspect of this application provides an oil-immersed transformer that facilitates oil maintenance, comprising: a transformer and an oil circulation mechanism, wherein the oil circulation mechanism is mounted on the transformer; the oil circulation mechanism includes an oil storage tank, an oil filter assembly, an oil supply component, a sedimentation mechanism, and an oil outlet pipe, wherein the oil storage tank is connected to the transformer via a connecting bracket; the oil supply component is disposed between the transformer and the oil storage tank; the oil filter assembly includes a flow guiding component and a filtering component, wherein the flow guiding component is disposed inside the oil storage tank and arranged away from the oil supply component; the filtering component is movably connected inside the oil storage tank and is located on one side of the flow guiding component; a plug assembly is provided at one end of the oil storage tank, and the plug assembly is connected to the filtering component; the sedimentation mechanism is in communication with the oil storage tank; the oil outlet pipe is disposed between the oil storage tank and the transformer, and one end of the oil outlet pipe is located between the plug assembly and the filtering component.

[0007] In addition, the oil-immersed transformer for easy maintenance of the oil according to the above embodiments of this application may also have the following additional technical features: Furthermore, the flow guiding component includes a fixed ring, a bearing, and a flow guiding plate, wherein the fixed ring is fixedly connected to the oil storage tank, and the flow guiding plate is rotatably connected to the fixed ring through the bearing; the flow guiding plate has multiple channels, and the channels are arranged in a curved and inclined manner.

[0008] Furthermore, the filter component includes a ring body, a filter screen, and multiple sealing rings, wherein the multiple sealing rings are sleeved on the outside of the ring body and the sealing rings abut against the inner wall of the oil storage tank; the filter screen is disposed inside the ring body; and one side of the ring body abuts against the fixing ring.

[0009] Furthermore, the sedimentation mechanism includes a sedimentation tank, a sedimentation pipe, and a guide pipe. A through groove is formed on the outer wall of the oil storage tank, located on one side of the guide component, and the sedimentation tank communicates with the through groove. One end of the sedimentation pipe is connected to the oil storage tank, and the other end of the sedimentation pipe is located on the other side of the guide component. A through hole is formed on the filter component, and the through hole is directly opposite one end of the sedimentation pipe. An oil drain bolt is provided at the other end of the sedimentation pipe. A guide pipe is provided between the sedimentation tank and the sedimentation pipe, and a valve is installed on the guide pipe.

[0010] Furthermore, the plug assembly includes a cover body, multiple fixing bolts, and multiple push rods, wherein the cover body is disposed at one end of the oil storage tank by the multiple fixing bolts; one end of the multiple push rods is connected to the cover body, and the other end of the multiple push rods is connected to the ring body.

[0011] Furthermore, the oil supply component includes a pump body and an oil inlet pipe, wherein the pump body is installed on the transformer, the oil inlet passage of the pump body is connected to the interior of the transformer, and the oil outlet passage of the pump body is connected to one end of the oil inlet pipe.

[0012] Furthermore, an indicator tube is provided on one side of the plug assembly, and a connecting tube is provided at both ends of the indicator tube. One end of the connecting tube passes through the plug assembly and is connected to the oil storage tank.

[0013] Compared with existing technologies, the technical solution provided in this application has the following beneficial effects: The oil-immersed transformer of this application, which facilitates oil maintenance, allows some impurities entering the tank to settle and collect in the sedimentation mechanism under gravity by setting a sufficient sedimentation area within the oil storage tank. When the oil flows through the guide component, it gains momentum to form a swirling flow, continuously sweeping across the surface of the filter component, allowing blocked impurities to settle into the sedimentation mechanism. For short-term maintenance, only the sedimentation mechanism needs to be disassembled to remove impurities; for long-term maintenance, a thorough cleaning can be achieved by disassembling the plug assembly and the filter component. This solution completes purification during the transformer oil circulation process, effectively preventing the long-term accumulation of impurities inside the transformer, thus not only facilitating maintenance but also significantly improving purification efficiency.

[0014] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram of an oil-immersed transformer structure for easy maintenance of the oil according to an embodiment of this application; Figure 2 This is a schematic diagram of an oil circulation mechanism for an oil-immersed transformer that facilitates oil maintenance, according to an embodiment of this application. Figure 3 This is a cross-sectional schematic diagram of an oil circulation mechanism for an oil-immersed transformer that facilitates oil maintenance, according to an embodiment of this application. Figure 4 This is a schematic diagram of an oil-immersed transformer oil filter assembly structure for easy maintenance according to an embodiment of this application. Figure 1 ; Figure 5 This is a cross-sectional view of the guide plate structure of an oil-immersed transformer for easy maintenance of the oil according to an embodiment of this application; Figure 6 This is a three-dimensional structural diagram of a flow guide plate for an oil-immersed transformer that facilitates oil maintenance, according to an embodiment of this application. Figure 7 This is a schematic diagram of an oil-immersed transformer oil filter assembly structure for easy maintenance according to an embodiment of this application. Figure 2 .

[0016] Reference numerals: 1. Transformer; 2. Oil circulation mechanism; 20. Connecting bracket; 21. Oil storage tank; 211. Plug assembly; 2111. Cover body; 2112. Fixing bolt; 2113. Top rod; 22. Oil filter assembly; 221. Flow guide component; 2211. Fixing ring; 2212. Bearing; 2213. Flow guide plate; 2214. Channel; 222. Filter component; 2221. Ring body; 2222. Filter screen; 2223. Sealing ring; 23. Oil supply component; 231. Pump body; 232. Oil inlet pipe; 24. Sedimentation mechanism; 241. Through groove; 242. Sedimentation tank; 243. Sedimentation pipe; 244. Flow guide pipe; 245. Oil drain bolt; 246. Valve; 25. Oil outlet pipe; 31. Indicator pipe; 32. Connecting pipe. Detailed Implementation

[0017] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0018] The following describes an oil-immersed transformer, an embodiment of the present application, which facilitates the maintenance of the oil, with reference to the accompanying drawings.

[0019] like Figures 1-7 As shown, the oil-immersed transformer for easy maintenance of oil in this application embodiment may include: a transformer 1 and an oil circulation mechanism 2.

[0020] The oil circulation mechanism 2 is installed on the transformer 1.

[0021] The oil circulation mechanism 2 includes an oil storage tank 21, an oil filter assembly 22, an oil supply component 23, a sedimentation mechanism 24, and an oil outlet pipe 25.

[0022] The oil storage tank 21 is connected to the transformer 1 via the connecting bracket 20.

[0023] Understandably, placing the oil storage tank 21 externally allows for real-time replenishment of the oil in the oil-immersed transformer, thereby ensuring its stable operation.

[0024] The oil supply component 23 is located between the transformer 1 and the oil storage tank 21. The oil supply component 23 is used to draw oil from the transformer into the oil storage tank 21, increase the pressure inside the oil storage tank 21, and force the oil to pass through the oil filter assembly 22.

[0025] The oil filter assembly 22 includes a flow guiding component 221 and a filter component 222.

[0026] The flow guiding component 221 is located inside the oil storage tank 21 and is positioned away from the oil supply component 23. The flow guiding component 221 can rotate under the counterforce of the oil after it passes through, and the oil passing through continuously sweeps over or impacts the surface of the filter component 222. It should be noted that the flow guiding component 221's positioning away from the oil supply component 23 allows the oil to obtain sufficient settling time and space after entering the oil storage tank 21, enabling some impurities to enter the settling mechanism 24 on their own, thus reducing the filtration pressure of the subsequent filter component 222.

[0027] The filter element 222 is movably connected inside the oil storage tank 21, and the filter element 222 is located on one side of the flow guide element 221.

[0028] Understandably, the filter element 222 is movably connected inside the oil storage tank 21, which facilitates subsequent disassembly and maintenance of the filter element 222. The filter element 222 is located on one side of the flow guide element 221 and can withstand the impact of the oil generated after the flow guide element 221 rotates on its surface.

[0029] One end of the oil storage tank 21 is equipped with a plug assembly 211, which is connected to the filter component 222. It should be noted that the plug assembly 211 and the oil storage tank 21 are detachably connected, which facilitates subsequent maintenance.

[0030] The sedimentation mechanism 24 is connected to the oil storage tank 21, and the sedimentation mechanism 24 is used to store impurities and sludge in the oil.

[0031] The oil outlet pipe 25 is located between the oil storage tank 21 and the transformer 1, with one end of the oil outlet pipe 25 located between the plug assembly 211 and the filter component 222.

[0032] Specifically, the oil in an oil-immersed transformer gradually ages over long-term operation and at high temperatures. By testing indicators such as the oil's acid value and dielectric loss, the degree of aging can be determined. For critical transformers, online oil chromatography monitoring devices are installed to monitor changes in dissolved gases in the oil in real time. Any abnormal increase in dissolved gases will trigger an immediate alarm, enabling condition-based maintenance.

[0033] In the embodiments of this application, an external control device (not shown in the figure) is also provided for the oil-immersed transformer. The oil chromatography monitoring device and the oil supply component 23 are respectively connected to the control device, and the control device is connected to the external central control room wirelessly.

[0034] When the oil supply component 23 is in operation, the oil in the oil-immersed transformer can be drawn into the oil storage tank 21. Since the guide component 221 is arranged far away from the oil supply component 23, the oil can obtain sufficient sedimentation time and space after entering the oil storage tank 21, allowing some impurities to enter the sedimentation mechanism 24 on their own.

[0035] As oil continuously enters the interior of the oil storage tank 21, the pressure of the oil inside the oil storage tank 21 increases. When the oil passes through the guide component 221, the guide component 221 rotates under the action of the oil's counter-thrust.

[0036] The filter element 222 filters impurities in the oil. Some impurities adhere to the filter element 222. The guide element 221 rotates, causing the oil with a certain impact force to sweep across the surface of the filter element 222, thereby removing the impurities attached to the surface of the filter element 222. The impurities accumulate between the filter element 222 and the guide element 221, and then enter the interior of the sedimentation mechanism 24 under the action of gravity, preventing impurities from accumulating in the transformer for a long time. Finally, the filtered oil can return to the interior of the transformer 1 through the oil outlet pipe 25.

[0037] After a certain period of time, relevant technicians can remove the sludge from the sedimentation unit 24. After an even longer period of time, relevant technicians can also disassemble the plugging assembly 211 and the filter component 222 to inspect and repair them, as well as the flow guiding component 221. The above process is convenient for maintenance and has a high purification efficiency.

[0038] In the embodiments of this application, the pressure of the oil in the oil storage tank 21 is slightly higher, and the oil passes through the filter component 222 based on the principle of pressure filtration.

[0039] In one embodiment of this application, such as Figures 4-6 As shown, the flow guiding component 221 includes a retaining ring 2211, a bearing 2212, and a flow guiding plate 2213.

[0040] Among them, the fixed ring 2211 is fixedly connected to the oil storage tank 21, and the guide plate 2213 is rotatably connected to the fixed ring 2211 through the bearing 2212. Multiple channels 2214 are opened on the guide plate 2213, and the channels 2214 are arranged in a curved and inclined manner.

[0041] It should be noted that the channel 2214 described in this embodiment is arranged in a curved and inclined manner, following the principle of impeller rotation, and is rotated by the reverse thrust provided by the oil guide plate 2213.

[0042] In one embodiment of this application, such as Figure 5 As shown, the filter component 222 includes a ring body 2221, a filter screen 2222, and a plurality of sealing rings 2223.

[0043] Multiple sealing rings 2223 are fitted on the outside of the ring body 2221, the sealing rings 2223 abut against the inner wall of the oil storage tank 21, the filter screen 2222 is set inside the ring body 2221, and one side of the ring body 2221 abuts against the fixing ring 2211.

[0044] It is understandable that the sealing ring 2223 is a metal ring, which can play a good sealing role between the oil storage tank 21 and the ring body 2221.

[0045] Specifically, when the oil passes through the guide component 221, the oil flows through the inclined channel 2214, and the oil guide plate 2213 provides a counter-force to make it rotate. The oil with a certain impact force sweeps across the surface of the filter screen 2222, thereby cleaning the impurities attached to the surface of the filter screen 2222 to avoid clogging of the filter screen 2222.

[0046] In one embodiment of this application, such as Figure 3 As shown, the sedimentation mechanism 24 includes a sedimentation tank 242, a sedimentation tube 243, and a guide tube 244.

[0047] The oil storage tank 21 has a through groove 241 on its outer wall. The through groove 241 is located on one side of the flow guide component 221, and the sedimentation tank 242 is connected to the through groove 241.

[0048] One end of the sedimentation pipe 243 is connected to the oil storage tank 21, and the other end of the sedimentation pipe 243 is located on the other side of the flow guiding component 221. The filter component 222 has a through hole, which is arranged opposite to one end of the sedimentation pipe 243.

[0049] The other end of the sedimentation pipe 243 is provided with an oil drain bolt 245, and a guide pipe 244 is provided between the sedimentation tank 242 and the sedimentation pipe 243. A valve 246 is installed on the guide pipe 244.

[0050] Specifically, impurities in the oil accumulate in the sedimentation tank 242 and sedimentation pipe 243. After a certain period of time, relevant technicians can discharge the sludge into the external collection device by turning the valve 246 and the drain bolt 245. If a large amount of oil is discharged, the relevant technicians can replenish the oil.

[0051] In one embodiment of this application, such as Figure 7 As shown, the plug assembly 211 includes a cover body 2111, multiple fixing bolts 2112 and multiple push rods 2113.

[0052] The cover 2111 is installed at one end of the oil storage tank 21 by multiple fixing bolts 2112, one end of multiple push rods 2113 is connected to the cover 2111, and the other end of the multiple push rods 2113 is connected to the ring 2221.

[0053] Specifically, when relevant technicians need to maintain the filter component 222, firstly, with the transformer 1 stopped running, the relevant technicians use external tools to rotate the fixing bolt 2112, thereby separating the cover 2111 from the oil storage tank 21. At this time, the oil in the oil storage tank 21 can be collected into the interior of the external collection device.

[0054] Pull the cover 2111, and the plugging assembly 211 will gradually detach the filter component 222 from the inside of the oil storage tank 21. After the relevant technicians have finished maintaining the filter component 222, the plugging assembly 211 and the filter component 222 will be placed back into the oil storage tank 21. At this time, the ring 2221 in the filter component 222 will abut against the fixing ring 2211 in the flow guide component 221. The relevant technicians will then use tools to tighten the fixing bolts 2112 to connect the plugging assembly 211 to the oil storage tank 21.

[0055] Then, the missing transformer oil is added into the oil storage tank 21, which facilitates maintenance and has a high purification efficiency.

[0056] In one embodiment of this application, such as Figure 2 As shown, the oil supply component 23 includes a pump body 231 and an oil inlet pipe 232, wherein, Pump body 231 is installed on transformer 1. The oil inlet passage of pump body 231 is connected to the interior of transformer 1, and the oil outlet passage of pump body 231 is connected to one end of oil inlet pipe 232.

[0057] In one embodiment of this application, such as Figure 3 As shown, an indicator tube 31 is provided on one side of the plug assembly 211, and a connecting tube 32 is provided at both ends of the indicator tube 31. One end of the connecting tube 32 passes through the plug assembly 211 and is connected to the oil storage tank 21.

[0058] It is understandable that the indicator tube 31 can be a transparent plastic tube, so that relevant technicians can easily observe the oil level in the oil storage tank 21 from the outside and replenish the oil in a timely manner. The specific method of replenishing the oil has been disclosed in the prior art, so it will not be described in detail here.

[0059] In summary, the oil-immersed transformer of this application, which facilitates oil maintenance, allows some impurities entering the tank to settle and collect in the sedimentation mechanism under gravity by providing a sufficient sedimentation area within the oil storage tank. When the oil flows through the guide component, it gains momentum to form a swirling flow, continuously sweeping over the surface of the filter component, allowing blocked impurities to settle into the sedimentation mechanism. For short-term maintenance, only the sedimentation mechanism needs to be disassembled to remove impurities; for long-term maintenance, a thorough cleaning can be achieved by disassembling the plug assembly and the filter component. This solution completes purification during the transformer oil circulation process, effectively preventing the long-term accumulation of impurities inside the transformer, making maintenance convenient and significantly improving purification efficiency.

[0060] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An oil-immersed transformer that facilitates oil maintenance, characterized in that, Includes: transformer and oil circulation mechanism, wherein, The oil circulation mechanism is installed on the transformer; The oil circulation mechanism includes an oil storage tank, an oil filter assembly, an oil supply component, a sedimentation mechanism, and an oil outlet pipe, wherein... The oil storage tank is connected to the transformer via a connecting bracket; The oil supply component is located between the transformer and the oil storage tank; The oil filter assembly includes a flow guiding component and a filtering component, wherein... The flow guiding component is disposed inside the oil storage tank and is located away from the oil supply component; The filter element is movably connected inside the oil storage tank, and the filter element is located on one side of the flow guiding component; One end of the oil storage tank is provided with a plugging assembly, which is connected to the filter component; The sedimentation mechanism is connected to the oil storage tank; The oil outlet pipe is located between the oil storage tank and the transformer, with one end of the oil outlet pipe located between the plug assembly and the filter component; The sedimentation mechanism includes a sedimentation tank, a sedimentation pipe, and a guide pipe, wherein, A through groove is provided on the outer wall of the oil storage tank, the through groove is located on one side of the flow guiding component, and the sedimentation tank is connected to the through groove; One end of the sedimentation tube is connected to the oil storage tank, and the other end of the sedimentation tube is located on the other side of the flow guiding component. The filter component has a through hole, and the through hole is arranged opposite to one end of the sedimentation tube. The other end of the sedimentation tube is equipped with an oil drain bolt; A guide pipe is provided between the sedimentation tank and the sedimentation tube, and a valve is installed on the guide pipe.

2. The oil-immersed transformer for easy maintenance of the oil according to claim 1, characterized in that, The flow guiding component includes a retaining ring, a bearing, and a flow guiding plate, wherein, The fixed ring is fixedly connected to the oil storage tank, and the guide plate is rotatably connected to the fixed ring through the bearing; The guide plate has multiple channels, which are arranged in a curved, inclined manner.

3. The oil-immersed transformer for easy maintenance of the oil according to claim 2, characterized in that, The filter component includes a ring body, a filter screen, and multiple sealing rings, wherein... Multiple sealing rings are sleeved on the outside of the ring body, and the sealing rings abut against the inner wall of the oil storage tank; The filter screen is disposed inside the ring body; One side of the ring body abuts against the fixed ring.

4. The oil-immersed transformer for easy maintenance of the oil according to claim 3, characterized in that, The plug assembly includes a cover body, multiple fixing bolts, and multiple push rods, wherein, The cover is mounted at one end of the oil storage tank by a plurality of fixing bolts; One end of each of the multiple push rods is connected to the cover, and the other end of each of the multiple push rods is connected to the ring.

5. The oil-immersed transformer for easy maintenance of the oil according to claim 1, characterized in that, The oil supply component includes a pump body and an oil inlet pipe, wherein... The pump body is installed on the transformer, the oil inlet passage of the pump body is connected to the interior of the transformer, and the oil outlet passage of the pump body is connected to one end of the oil inlet pipe.

6. The oil-immersed transformer for easy maintenance of the oil according to claim 1, characterized in that, The plugging assembly has an indicator tube on one side, and connecting tubes are provided at both ends of the indicator tube. One end of the connecting tube passes through the plugging assembly and is connected to the oil storage tank.

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