An oil-immersed transformer

Abstract

The application provides an oil-immersed transformer, and relates to the technical field of transformers, which comprises a transformer oil tank and a scrap-removing cooling structure, wherein the scrap-removing cooling structure is installed on the top of the transformer oil tank and comprises a distribution pipe, an oil storage cylinder, a separation component and an adsorption component; the distribution pipe is connected with the oil storage cylinder and the transformer oil tank; the oil storage cylinder is used for sucking the oil in the transformer oil tank; a fixed partition ring is embedded in the oil storage cylinder; a lower oil pipe is arranged at the bottom center of the oil storage cylinder and is connected with the distribution pipe; the separation component is vertically installed on the inner surface of the fixed partition ring and is located above the lower oil pipe, and is used for separating and filtering the oil entering the oil storage cylinder; the adsorption component is distributed on the outer side of the fixed partition ring and is in contact with the outer circumferential surface of the fixed partition ring, and is used for adsorbing the separated scrap iron; when the separation component is impacted by the entering oil of the lower oil pipe, the separation component rotates to centrifugally separate the oil to the inner wall of the fixed partition ring. The application can reduce the mutual influence degree of the scrap iron and the circulating oil.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, and in particular to an oil-immersed transformer. Background Technology

[0002] Oil-immersed transformers are electrical devices that use insulating oil as the core medium and achieve voltage transformation through electromagnetic induction. They are widely used in power transmission, industrial and mining enterprises, rail transportation and other fields. Their core features include efficient heat dissipation, excellent insulation performance and low noise operation.

[0003] For example, patent document CN118969453B discloses an oil-immersed transformer, including an oil tank and a foot connected to the bottom of the oil tank. The oil tank is equipped with windings, and an oil conservator is connected to the outside of the oil tank through an oil inlet pipe. The outer wall of the oil tank is provided with equidistant arrays of heat dissipation fins. An oil drain pipe is connected to the bottom of the oil tank. The transformer also includes a cleaning component for removing dust from the surface of the heat dissipation fins and a dredging component for preventing blockage of the oil inlet and drain pipes. The dredging component and the cleaning component operate synchronously.

[0004] However, after the oil pipes are cleared in the aforementioned patent documents, the iron filings and impurities will remain in the oil tank. As the oil flows, they may form irregular vortices in the iron filings area. These irregular vortices will cause the oil to spin in the iron filings area, affecting the outward flow of heat carried by the oil, resulting in severe local aging of the oil and affecting the cooling effect inside the transformer. Furthermore, directly removing iron filings from the oil through filtration can easily carry the iron filings back into the oil tank as the oil circulates and cools, affecting the oil's heat dissipation effect on the entire transformer. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide an oil-immersed transformer that aims to ensure good heat dissipation efficiency while reducing the degree of interaction between iron filings and circulating oil.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an oil-immersed transformer, comprising a transformer tank and a chip removal and cooling structure. The transformer tank contains multiple windings. The chip removal and cooling structure is installed on the top of the transformer tank and is used to cool the oil inside the transformer tank and remove iron filings. The chip removal and cooling structure includes a distribution pipe, an oil reservoir, a separation component, and an adsorption component. The distribution pipe connects the oil reservoir to the transformer tank. The oil reservoir is used to draw oil from the inside of the transformer tank. A fixed partition ring is embedded inside the oil tank. A lower oil pipe communicating with the distribution pipe is located at the center of the bottom of the oil tank. The separation component is vertically installed on the inner surface of the fixed partition ring and located above the lower oil pipe. It is used to separate and filter the internal oil entering the oil tank. The adsorption component is distributed on the outside of the fixed partition ring and contacts the outer circumferential surface of the fixed partition ring. It is used to adsorb the separated iron filings. When the separation component is impacted by the oil entering through the lower oil pipe, the separation component rotates and centrifugally pushes the oil to the inner wall of the fixed partition ring.

[0007] In addition, the oil-immersed transformer according to the present invention may also have the following additional technical features:

[0008] Furthermore, the separation component includes a separation filter plate, a mounting block, turbine blades, and an annular scraper. The separation filter plate is horizontally installed on the inner wall of the fixed spacer ring. A rotatable electric telescopic rod is vertically arranged at the center of the separation filter plate. The mounting block is installed at the lower end of the electric telescopic rod. The turbine blades are arranged in multiple sets, and the multiple sets of turbine blades are arranged in an array along the circumference of the mounting block. The annular scraper is fixedly sleeved on the outer end of the multiple turbine blades, and the outer surface of the annular scraper is in contact with the inner wall of the fixed spacer ring.

[0009] Furthermore, the electric telescopic rod is provided with a telescopic inner rod inside, and a sealed telescopic tube is sleeved on the outside of the inner rod. The upper and lower ends of the sealed telescopic tube are respectively fixed to the upper surface of the mounting block and the lower surface of the electric telescopic rod.

[0010] Furthermore, a cavity is formed between the outer surface of the fixed spacer ring and the inner wall of the oil storage cylinder. The adsorption component is installed in the cavity. The adsorption component includes a stabilizing ring and an electromagnetic tube. The stabilizing ring is installed in the cavity. Multiple electromagnetic tubes are provided and are all embedded inside the stabilizing ring. The electromagnetic tubes are circumferentially distributed on the outer side of the fixed spacer ring, and the inner end of the electromagnetic tube contacts the outer circumferential surface of the fixed spacer ring.

[0011] Furthermore, multiple cooling plates are fitted onto the outer circumferential surface of the fixed spacer ring, and a power supply box is provided on the lower outer surface of the cooling plates.

[0012] Furthermore, an oil inlet component is provided inside the lower oil pipe. The oil inlet component includes an embedded block, a lower limiting ring, a rotating circular plate, and an arc-shaped load-bearing block. The embedded block is located on the inner wall of the lower oil pipe, the lower limiting ring is located on the inner wall of the lower oil pipe and below the embedded block, the rotating circular plate is horizontally located above the lower limiting ring, one end of the rotating circular plate is rotatably connected to the embedded block, and the arc-shaped load-bearing block is embedded in the other end of the rotating circular plate.

[0013] Furthermore, the distribution pipe fitting includes a tapered oil pipe, a distribution horizontal pipe, a vertical oil pipe, a telescopic corrugated pipe, and a bottom oil pipe. The tapered oil pipe is fixedly sleeved on the outside of the lower oil pipe. The distribution horizontal pipe is located at the lower end of the tapered oil pipe. Multiple vertical oil pipes are provided, all of which are connected to the distribution horizontal pipe. The telescopic corrugated pipe is located at the lower end of the vertical oil pipe. The bottom oil pipe is installed at the lower end of the telescopic corrugated pipe. The lower end of the bottom oil pipe extends to the bottom of the transformer oil tank. Multiple oil suction notches are formed on the circumference of the lower end of the bottom oil pipe.

[0014] Furthermore, the lower end of the tapered oil pipe penetrates the top of the transformer tank, and a sealing detection component is provided between the tapered oil pipe and the upper surface of the transformer tank. The sealing detection component includes a fixing ring, a flange, a transparent layer, an annular strip, and a visual identifier. The fixing ring is sleeved on the tapered oil pipe, the flange is sleeved on the outside of the tapered oil pipe and fixed to the upper surface of the transformer tank, the transparent layer is fixed between the fixing ring and the flange, the annular strip is located inside the transparent layer, and the visual identifier is embedded in the upper surface of the flange.

[0015] Furthermore, an oil extraction pipe is provided at the top of the oil storage tank, which is used to connect to an external oil pump.

[0016] The beneficial effects of the present invention include at least the following:

[0017] 1. This invention can separate oil and iron filings inside the transformer tank during the oil circulation cooling process by using a chip removal cooling structure. The iron filings are adsorbed onto the inner wall of the fixed spacer ring, and during the adsorption process, the iron filings are further cooled by the cooled fixed spacer ring. Finally, the oil transported out through the oil extraction pipe returns to the transformer tank. During this circulation process, since there is no interference from iron filings, it will not affect the heat dissipation of the internal windings. Moreover, the oil that has been cooled by the fixed spacer ring and the cooling plate will be transported to the external cooling system, which will shorten the time to reach the set cooling temperature of the oil and improve the cooling effect inside the transformer.

[0018] 2. By setting up an oil inlet component, this invention prevents oil from flowing back into the transformer oil tank without affecting the operation of drawing oil into the oil storage tank, thus facilitating the separation of oil and iron filings. At the same time, by using distributed pipe fittings, oil can be drawn from multiple locations in the transformer oil tank simultaneously, and the length of the pipe can be extended to adapt to the depth of the transformer oil tank, thereby expanding the range of oil and iron filings drawn from inside the transformer oil tank.

[0019] 3. By setting a sealing detection component, this invention can play a sealing detection role at the connection between the conical oil pipe and the transformer oil tank. If oil leakage occurs, a warning can be issued through a visual identifier, and the leak point can be sealed at the same time to prevent oil from overflowing and causing waste. At the same time, the aging degree of the oil inside the transformer oil tank can be analyzed based on the detected oil color, which facilitates timely detection and warning. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the oil-immersed transformer of the present invention;

[0021] Figure 2 This is a longitudinal sectional view of the oil-immersed transformer of the present invention;

[0022] Figure 3 For the present invention Figure 2 Schematic diagram of the chip removal and cooling structure;

[0023] Figure 4 For the present invention Figure 3 Longitudinal sectional view of the central oil storage tank;

[0024] Figure 5 For the present invention Figure 4 A bottom view of the structure of the split component;

[0025] Figure 6 For the present invention Figure 4 Enlarged view of region B in the middle;

[0026] Figure 7 For the present invention Figure 3 A cross-sectional view of the central oil storage tank;

[0027] Figure 8 For the present invention Figure 4 Schematic diagram of the structure of the central oil inlet component;

[0028] Figure 9 For the present invention Figure 4 Cross-sectional view of the sealing test component;

[0029] Figure 10 For the present invention Figure 3 Enlarged view of region A in the middle;

[0030] Explanation of key component symbols:

[0031] 100. Transformer oil tank; 101. Fins; 102. Winding; 200. Chip removal and cooling structure; 201. Oil reservoir; 2011. Fixing spacer ring; 2012. Arc-shaped base plate; 202. Oil suction pipe; 203. Lower oil pipe; 204. Distribution pipe fittings; 2041. Conical oil pipe; 2042. Telescopic corrugated pipe; 2043. Bottom oil pipe; 2044. Load-bearing ring; 2045. Oil suction notch; 2046. Vertical oil pipe; 205. Support plate; 206. Heat dissipation hole; 207. Adsorption component; 2071. Stabilizing ring; 2072. Electromagnetic tube; 2073. Power supply box; 2074. Refrigeration plate; 208. Separation component; 2081. Separation filter plate; 2082. Electric telescopic rod; 2083. Rotating bearing; 2084. Mounting block; 2085. Turbine blade; 2086. Annular scraper; 2087. Inner rod; 2088. Sealing telescopic tube; 209. Oil inlet component; 2091. Lower limit ring; 2092. Embedded block; 2093. Rotating circular plate; 2094. Arc-shaped load-bearing block; 300. Sealing detection component; 301. Flange; 302. Fixing ring; 303. Transparent layer; 304. Vision recognition device; 305. Annular strip;

[0032] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0033] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0034] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] Example 1:

[0037] Please see Figures 1 to 7 This application provides an oil-immersed transformer, comprising a transformer tank 100 and a chip removal and cooling structure 200. The transformer tank 100 has multiple windings 102 inside, and fins 101 are provided on its outer surface for further heat dissipation. The chip removal and cooling structure 200 is installed on top of the transformer tank 100 and is used to cool the internal oil of the transformer tank 100 and remove iron filings.

[0038] Specifically, the chip removal and cooling structure 200 includes a distribution pipe 204, an oil reservoir 201, a separation component 208, and an adsorption component 207. A support plate 205 is provided between the oil reservoir 201 and the transformer oil tank 100 to provide sufficient space between them. The distribution pipe 204 connects the oil reservoir 201 and the transformer oil tank 100. The oil reservoir 201 is used to draw oil from the inside of the transformer oil tank 100 through the distribution pipe 204. A fixing spacer 2011 is embedded inside the oil reservoir 201. Preferably, the fixing spacer 2011 is an iron ring, which can both conduct temperature and facilitate the adsorption of iron filings. The adsorption component 207 is distributed on the outside of the fixed septum 2011 and contacts the outer circumferential surface of the fixed septum 2011, forming an oil storage space between the inside of the fixed septum 2011 and the upper and lower surfaces of the oil storage tank 201. A lower oil pipe 203, connected to the distribution pipe 204, is located at the bottom center of the oil storage tank 201. The separation component 208 is vertically installed on the inner surface of the fixed septum 2011 and above the lower oil pipe 203 located at the bottom center of the oil storage tank 201. The separation component 208 rotates due to the impact of the oil entering through the lower oil pipe 203. The rotating separation component 208 centrifuges the oil against the inner wall of the fixed septum 2011. During the centrifugation process, iron filings are adsorbed onto the inner wall of the fixed septum 2011, and the centrifuged oil contacts the fixed septum 2011 in a more dispersed manner, making it easier to cool the oil. Furthermore, the rotating separation component 208 further mixes the oil.

[0039] In this embodiment, during the oil circulation cooling process inside the transformer oil tank 100, the oil and iron filings are separated by the chip removal cooling structure 200, causing the iron filings to be adsorbed onto the inner wall of the fixed spacer ring 2011.

[0040] In this embodiment, preferably, the separation component 208 for rotating and separating the oil drawn into the oil storage tank 201 includes a separation filter plate 2081, a mounting block 2084, a turbine blade 2085, and an annular scraper 2086.

[0041] Specifically, the separator filter plate 2081 is horizontally installed on the inner wall of the fixed spacer ring 2011. The surface of the separator filter plate 2081 has small holes that allow oil to pass through and be drawn into the oil extraction pipe 202, while also preventing iron filings from passing through. It should be noted that the oil extraction pipe 202 in the attached diagram is a sectional view and does not represent the exact length shown in the diagram.

[0042] The free end of the oil suction pipe 202 is used to connect to an external oil pump, thereby facilitating the circulation and suction operation of the oil inside the transformer tank 100. A rotatable electric telescopic rod 2082 is vertically installed at the center of the separator filter plate 2081. A rotating bearing 2083 is embedded between the electric telescopic rod 2082 and the separator filter plate 2081, so as not to affect the rotation of the turbine blades 2085. The mounting block 2084 is installed at the lower end of the electric telescopic rod 2082. Multiple sets of turbine blades 2085 are arranged in an array along the circumference of the mounting block 2084. When impacted by the oil entering the oil reservoir 201, the turbine blades 2085 rotate, causing the multiple turbine blades 2085 to rotate. The rotating turbine blades 2085 generate centrifugal force on the oil, causing it to centrifuge outwards and contact the inner wall of the fixed spacer ring 2011. This facilitates the adsorption and separation of iron filings in the oil, and the thinner edge of the centrifuged oil allows for further cooling by contacting the inner wall of the fixed spacer ring 2011. An annular scraper 2086 is fixedly sleeved on the outer end of the multiple turbine blades 2085, with its outer surface adhering to the inner wall of the fixed spacer ring 2011. The annular scraper 2086 does not affect the rotation of the multiple turbine blades 2085 and can move downwards in conjunction with the electric telescopic rod 2082, thereby scraping and pushing downwards any iron filings remaining on the inner wall of the fixed spacer ring 2011 that cannot fall directly.

[0043] In this embodiment, preferably, the electric telescopic rod 2082 is provided with a telescopic inner rod 2087 inside, and a sealing telescopic tube 2088 is sleeved on the outside of the inner rod 2087. The sealing telescopic tube 2088 does not affect the telescopic movement of the inner rod 2087, and can also prevent oil from entering the interior of the electric telescopic rod 2082. The upper and lower ends of the sealing telescopic tube 2088 are respectively fixed to the upper surface of the mounting block 2084 and the lower surface of the electric telescopic rod 2082. When the inner rod 2087 is in the retracted state in the initial position, the upper end of the turbine blade 2085 is attached to the lower surface of the separation filter plate 2081.

[0044] In this embodiment, preferably, a cavity is formed between the outer surface of the fixing ring 2011 and the inner wall of the oil reservoir 201. Oil from inside the fixing ring 2011 will not enter the cavity, and the adsorption component 207 is installed in the cavity. Specifically, the adsorption component 207 includes a stabilizing ring 2071 and an electromagnetic tube 2072. The stabilizing ring 2071 is installed in the cavity, and multiple electromagnetic tubes 2072 are provided. Each electromagnetic tube 2072 is embedded inside the stabilizing ring 2071, allowing for convenient simultaneous installation and fixation of multiple electromagnetic tubes 2072. The electromagnetic tubes 2072 are circumferentially distributed on the outer side of the fixing ring 2011, with their inner ends contacting the outer circumferential surface of the fixing ring 2011. The magnetic attraction force generated by the electromagnetic tubes 2072 is conducted to the surface of the fixing ring 2011, adsorbing iron filings mixed in with the oil acting on the inner wall of the fixing ring 2011. Understandably, the magnetic attraction of the solenoid tube 2072 to the iron filings is greater than the centrifugal force of the oil separation, thus preventing the iron filings from detaching from the fixed spacer ring 2011 again.

[0045] In this embodiment, preferably, a plurality of cooling plates 2074 are fitted onto the outer circumferential surface of the fixing spacer 2011. Each cooling plate 2074 is a semiconductor plate, and a power supply box 2073 is provided on the lower outer surface of the cooling plate 2074. The cooling plate 2074 is electrically connected to the power supply box 2073. A heat dissipation hole 206 is provided on the surface of the oil reservoir 201 at the location of the cooling plate 2074 to facilitate heat dissipation from the cooling plate 2074. When the cooling plate 2074 is working, the side of the cooling plate 2074 that is fitted onto the fixing spacer 2011 absorbs heat and conducts the temperature to the surface of the fixing spacer 2011, while the opposite side of the cooling plate 2074 releases heat and, in conjunction with the corresponding heat dissipation hole 206, conducts the temperature to the outside. It should be noted that the detailed working principle of the cooling plate 2074 is prior art and will not be described in detail in this application.

[0046] In this embodiment, during the oil circulation cooling process inside the transformer oil tank 100, the oil and iron filings are separated by the chip removal cooling structure 200, causing the iron filings to adhere to the inner wall of the fixed spacer ring 2011. During this adsorption process, the iron filings are further cooled by the fixed spacer ring 2011, which is cooled by the cooling plate 2074. Finally, the oil transported out through the oil extraction pipe 202 returns to the transformer oil tank 100. During this circulation process, the absence of iron filings prevents interference with the heat dissipation of the internal winding 102. Furthermore, the oil, after being assisted in cooling by the fixed spacer ring 2011 and the cooling plate 2074, is transported to the external cooling system, which shortens the time required to reach the set cooling temperature. This is achieved by utilizing the cooling plate... The 2074 centrifugal cooling plate assists in cooling the oil. After centrifugal cooling, the oil is further pumped into the external cooling system for further cooling. For example, if the oil needs to be cooled to 10°C, and the overall temperature of the oil circulating in the transformer is 30°C, then the cooling plate 2074, in conjunction with the fixed spacer ring 2011, will assist in cooling the oil to 25°C. The time required for the oil at 25°C to cool to 10°C in the cooling system is shorter than the time required to directly cool from 30°C to 10°C, allowing the oil to reach the required cooling temperature more quickly, thereby improving cooling efficiency. This allows the oil to re-enter the transformer for cooling more quickly, improving the overall cooling efficiency of the transformer. It should be noted that the oil cooling temperature in this application is illustrative; the specific oil temperature needs to be set according to actual production requirements and does not represent a unique, fixed value.

[0047] In summary, the turbine blade 2085 is initially located on the lower surface of the separator filter plate 2081, and the oil pump connected to the oil extraction pipe 202 operates, drawing oil from the transformer oil tank 100 into the oil storage tank 201 through the distribution pipe 204. Upon impact with the oil, the oil inlet component 209 opens, allowing the oil in the oil storage tank 201 to act on the turbine blade 2085. The turbine blade 2085 rotates under force, generating centrifugal force on the oil, which disperses outwards and acts on the inner wall of the fixed spacer ring 2011. At this time, the solenoid tube 2072 and the cooling plate 2074 operate. The surface of the cooling plate 2074 that adheres to the fixed spacer ring 2011 serves as a cooling surface, conducting low temperature to the fixed spacer ring 2011, thus cooling the oil in contact with the fixed spacer ring 2011. As the turbine blades 2085 rotate, the oil continues to cool down. The rotation also mixes the cooled oil with the continuously entering, uncooled oil. Meanwhile, iron filings in the oil that come into contact with the fixed septum 2011 are conducted to the magnetic attraction and fixation on the fixed septum 2011, so that the oil will not carry iron filings again after leaving the fixed septum 2011. As the oil moves upward with the suction, some of the iron filings that are not completely removed are filtered by the separation filter plate 2081, so that the upward flowing oil is not mixed with iron filings. During the rotation of the turbine blades 2085, the iron filings attached to the lower surface of the separation filter plate 2081 are scraped off, and the centrifugal force of the rotation throws the iron filings toward the inner wall of the fixed septum 2011, where they are then attracted and adsorbed. Because the turbine blades 2085 continuously scrape the surface of the separator filter plate 2081, the separator filter plate 2081 will not be clogged, thus achieving continuous oil flow. After the oil suction is completed and no further suction is needed, the oil inlet component 209 closes, stopping the oil from entering. At this time, the turbine blades 2085 stop rotating, the solenoid tube 2072 also stops working, and the magnetic attraction force of the fixed spacer ring 2011 on the iron filings disappears. The iron filings on the fixed spacer ring 2011 fall downwards due to gravity, while the iron filings remaining on the inner wall of the fixed spacer ring 2011 can be removed by the electromagnetic induction device. When the telescopic rod 2082 is in operation, specifically, the inner rod 2087 inside the electric telescopic rod 2082 extends, the sealed telescopic tube 2088 unfolds, driving the turbine blades 2085 and the annular scraper 2086 to move downwards, pushing the iron filings attached to the inner wall of the fixed spacer ring 2011 downwards onto the arc-shaped base plate 2012. The arc-shaped base plate 2012 can then be disassembled. Since there are sealing measures, such as sealing rubber strips, between the arc-shaped base plate 2012 and the oil reservoir 201, there will be no leakage. This also facilitates the disassembly of the arc-shaped base plate 2012, allowing the iron filings to be removed and cleaned.

[0048] Example 2

[0049] Reference Figure 3 , Figure 4 , Figure 8 and Figure 10 This is the second embodiment of the present invention.

[0050] In this embodiment, preferably, the lower oil pipe 203 at the bottom of the oil reservoir 201 is provided with an oil inlet component 209. The oil inlet component 209 neither affects the oil being drawn into the oil reservoir 201 nor allows the oil to flow back into the transformer tank 100. Specifically, the oil inlet component 209 includes an embedded block 2092, a lower limiting ring 2091, a rotating circular plate 2093, and an arc-shaped load-bearing block 2094. An embedded block 2092 is disposed on the inner wall of the lower oil pipe 203. A lower limiting ring 2091 is disposed on the inner wall of the lower oil pipe 203 and located below the embedded block 2092. A rotating circular plate 2093 is horizontally positioned above the lower limiting ring 2091. One end of the rotating circular plate 2093 is rotatably connected to the embedded block 2092, and an arc-shaped load-bearing block 2094 is embedded in the lower surface of the other end of the rotating circular plate 2093. The diameter of the rotating circular plate 2093 is smaller than the diameter of the lower oil pipe 203. A notch is provided on the upper surface of the lower limiting ring 2091 to allow the rotating circular plate 2093 to rotate around the embedded block 2092, thereby facilitating the rotation of the rotating circular plate 2093 within the lower oil pipe 203 at a certain acute angle. The inner diameter of the lower limiting ring 2091 is smaller than the diameter of the rotating circular plate 2093, thus not affecting the entry of oil into the oil reservoir 201. Meanwhile, the lower limit ring 2091 can limit the rotation of the circular plate 2093, preventing the circular plate 2093 from rotating downwards.

[0051] In this embodiment, when it is no longer necessary to pump oil, under the gravity of the oil in the arc-shaped load-bearing block 2094 and the oil reservoir 201, the rotating circular plate 2093 rotates downward to reset. Since the inner diameter of the lower limit ring 2091 is smaller than the diameter of the rotating circular plate 2093, the rotating circular plate 2093 covers the hollow area in the middle of the lower limit ring 2091, and the oil in the oil reservoir 201 cannot flow downward into the lower oil pipe 203.

[0052] In this embodiment, preferably, the lower oil pipe 203 is connected to the distribution pipe 204 extending into the transformer tank 100. Specifically, the distribution pipe 204 includes a tapered oil pipe 2041, a distribution horizontal pipe, a vertical oil pipe 2046, a retractable telescopic corrugated pipe 2042, and a bottom oil pipe 2043.

[0053] The tapered oil pipe 2041 is fixedly sleeved on the outside of the lower oil pipe 203. A distribution horizontal pipe is installed at the lower end of the tapered oil pipe 2041, forming a T-shape to facilitate the installation and distribution of the vertical oil pipes 2046. Multiple vertical oil pipes 2046 are provided, all connected to the distribution horizontal pipes. A telescopic corrugated pipe 2042 is located at the lower end of the vertical oil pipes 2046. The length of the telescopic corrugated pipe 2042 is extendable and does not affect oil suction. The bottom oil pipe 2043 is installed on the telescopic corrugated pipe 2042. At the lower end, the bottom oil pipe 2043 extends to the bottom of the transformer oil tank 100. A load-bearing ring 2044 is fixedly sleeved on the bottom oil pipe 2043. Under the gravity of the load-bearing ring 2044, the bottom oil pipe 2043 can be driven to move downward, and the telescopic corrugated pipe 2042 gradually unfolds until the bottom oil pipe 2043 contacts the bottom of the transformer oil tank 100. Multiple oil suction notches 2045 are opened on the lower circumference of the bottom oil pipe 2043 to facilitate the suction of oil from the bottom of the transformer oil tank 100.

[0054] In this embodiment, the distribution pipe 204 can be used to draw oil at multiple locations within the transformer oil tank 100, and the length of the pipe can be extended to adapt to the depth of the transformer oil tank 100.

[0055] In summary, during operation, when pumping oil from the transformer oil tank 100, the bottom oil pipe 2043 contacts the bottom of the transformer oil tank 100. Oil enters the distribution pipe 204 through the oil suction notch 2045 and flows upward, impacting the rotating circular plate 2093. This causes the rotating circular plate 2093 to rotate upward around the embedded block 2092 until a gap is opened between the rotating circular plate 2093 and the lower oil pipe 203, allowing oil to continuously enter the oil reservoir 201. When oil pumping is no longer needed, the arc-shaped support block 2094, under the action of gravity, causes the rotating circular plate 2093 to rotate downward around the embedded block 2092 until it contacts the lower limit ring 2091. At this point, the lower limit ring 2091 limits the position of the rotating circular plate 2093, preventing it from rotating further downward. It can be understood that the weight of the arc-shaped support block 2094 is less than the upward impact force of the oil on the rotating circular plate 2093.

[0056] Example 3

[0057] Reference Figure 4 , Figure 7 , Figure 9 This is the third embodiment of the present invention.

[0058] In this embodiment, preferably, the lower end of the tapered oil pipe 2041 penetrates the top of the transformer oil tank 100, and a sealing detection component 300 is provided between the tapered oil pipe 2041 and the upper surface of the transformer oil tank 100. Specifically, the sealing detection component 300 includes a fixing ring 302, a flange 301, a transparent layer 303, an annular strip 305, and a visual recognition device 304.

[0059] The retaining ring 302 is fixedly sleeved on the tapered oil pipe 2041, and the flange 301 is sleeved on the outside of the tapered oil pipe 2041 and fixed to the upper surface of the transformer oil tank 100. The flange 301 is fixed to the surface of the transformer oil tank 100 with bolts for easy disassembly and assembly. A sealing rubber strip is embedded between the flange 301 and the transformer oil tank 100 to prevent leakage. A transparent layer 303 is fixed between the retaining ring 302 and the flange 301. The transparent layer 303 allows easy viewing of the internal annular strip 305 and acts as a sealing film to prevent oil leakage. Optionally, the transparent layer 303 can be a transparent polyethylene film. The annular strip 305 is located on the inner side of the transparent layer 303. The annular strip 305 is a white cotton strip with good absorption capacity and easy display of oil color. A visual identifier 304 is embedded in the upper surface of the flange 301. The visual identifier 304 allows easy viewing of the transparent layer 303 and the color of the annular strip 305.

[0060] In this embodiment, by setting a sealing detection component 300, the connection between the tapered oil pipe 2041 and the transformer oil tank 100 can be sealed and detected. If oil leakage occurs, a warning can be issued through the visual recognition device 304, and the leak point can be sealed to prevent oil from overflowing and causing waste. At the same time, the aging degree of the oil inside the transformer oil tank 100 can be analyzed based on the detected oil color, which facilitates timely detection and warning.

[0061] In this embodiment, preferably, an oil extraction pipe 202 is provided at the top of the oil storage tank 201. The oil extraction pipe 202 is connected to an external oil pump to facilitate the extraction and separation of iron filings from the oil in the transformer oil tank 100.

[0062] In this embodiment, preferably, two arc-shaped bottom plates 2012 are symmetrically arranged at the bottom of the oil storage cylinder 201. The outer end of the arc-shaped bottom plate 2012 is located at the inner wall of the fixing spacer 2011, so that the iron filings attached to the inner wall of the fixing spacer 2011 can fall directly onto the arc-shaped bottom plate 2012.

[0063] In summary, during use, the sealing detection component 300 is installed between the conical oil pipe 2041 and the transformer oil tank 100. If an oil leak occurs between the two, the leaked oil will be absorbed by the annular strip 305, causing the absorbent strip to change color. This discolored strip will be detected by the vision recognition device 304. The vision recognition device 304 can be an industrial camera or other video equipment, equipped with an existing vision recognition system to identify the detected color change of the annular strip 305, transmit the detection data externally, and issue a warning. The cooperation between the vision recognition system and the vision recognition device 304 in detecting oil leaks or color changes is existing technology and will not be described in detail in this application. Furthermore, if an oil leak is detected at the connection, the color of the detected oil can be used to determine whether the oil in the transformer oil tank 100 has aged, improving the sealing detection effect of the oil in the transformer oil tank 100. This sealing detection component 300 can also be installed at similar structural connections, such as between a pipe and a tank, increasing the detection range of oil leaks.

[0064] Example 4

[0065] This embodiment is obtained by combining Embodiment 1, Embodiment 2 and Embodiment 3.

[0066] During use, the oil in the transformer oil tank 100 is drawn into the oil storage tank 201 by an external oil pump. The oil and iron filings are separated by centrifugation using the separation component 208. The separated iron filings are adsorbed by the adsorption component 207, and the separated oil is further cooled by the cooling plate 2074, shortening the time for the oil to enter the external cooling system. Without the influence of iron filings, it is less likely to form vortex flow inside the transformer oil tank 100, improving the oil's fluidity and the heat dissipation and cooling effect inside the transformer oil tank 100. Furthermore, the connection between the transformer oil tank 100 and the pipeline can be detected and warned by the sealing detection component 300, which can reduce the risk of leakage.

[0067] 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.

[0068] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. An oil-immersed transformer, characterized in that, The oil-immersed transformer includes: A transformer oil tank, wherein multiple sets of windings are provided inside the transformer oil tank; A chip removal and cooling structure is installed on the top of the transformer oil tank to cool the internal oil of the transformer oil tank and remove iron filings. The chip removal and cooling structure includes distribution pipes, an oil storage tank, a separation component, and an adsorption component. The distribution pipe is used to connect the oil storage tank and the transformer oil tank; The oil reservoir is used to draw oil from the inside of the transformer tank. A fixed spacer ring is embedded inside the oil reservoir, and a lower oil pipe communicating with the distribution pipe is provided at the center of the bottom of the oil reservoir. The separation component is vertically installed on the inner surface of the fixed spacer ring and located above the lower oil pipe, and is used to separate and filter the internal oil entering the oil storage tank; The adsorption components are distributed on the outside of the fixed spacer and in contact with the outer circumferential surface of the fixed spacer, and are used to adsorb the separated iron filings; When the separating component is impacted by the oil entering the lower oil pipe, the separating component rotates and centrifugally pushes the oil to the inner wall of the fixed spacer ring. The separating component includes: A separation filter plate is horizontally installed on the inner wall of the fixed spacer ring, and a rotatable electric telescopic rod is vertically installed at the center of the separation filter plate; Mounting block, installed at the lower end of the electric telescopic rod; The turbine blades are provided in multiple sets, and the multiple sets of turbine blades are arranged in an array along the circumferential surface of the mounting block; An annular scraper is fixedly sleeved on the outer end of multiple turbine blades, and the outer surface of the annular scraper is in contact with the inner wall of the fixed spacer ring. A cavity is formed between the outer surface of the fixed spacer ring and the inner wall of the oil storage cylinder, and the adsorption component is installed in the cavity. The adsorption component includes: A stabilizing ring is installed in the cavity; Multiple electromagnetic tubes are provided and are all embedded inside the stabilizing ring. The electromagnetic tubes are circumferentially distributed on the outside of the fixed spacer ring, and the inner end of the electromagnetic tube contacts the outer circumferential surface of the fixed spacer ring.

2. The oil-immersed transformer according to claim 1, characterized in that, The electric telescopic rod has a telescopic inner rod inside, and a sealed telescopic tube is sleeved on the outside of the inner rod. The upper and lower ends of the sealed telescopic tube are respectively fixed to the upper surface of the mounting block and the lower surface of the electric telescopic rod.

3. The oil-immersed transformer according to claim 1, characterized in that, Multiple cooling plates are fitted onto the outer circumferential surface of the fixed spacer ring, and a power supply box is provided on the lower outer surface of the cooling plates.

4. The oil-immersed transformer according to claim 1, characterized in that, The lower oil pipe is equipped with an oil inlet component, which includes: An embedded block is disposed on the inner wall of the lower oil pipe; A lower limiting ring is provided on the inner wall of the lower oil pipe and located below the embedded block; Rotate the circular plate so that it is horizontally positioned above the lower limiting ring, with one end of the rotating circular plate rotatably connected to the embedded block; An arc-shaped load-bearing block is embedded at the other end of the rotating circular plate.

5. The oil-immersed transformer according to claim 1, characterized in that, The distribution pipe fitting includes: A tapered oil pipe is fixedly sleeved on the outside of the lower oil pipe. A distribution horizontal pipe is provided at the lower end of the tapered oil pipe; There are multiple vertical oil pipes, all of which are connected to the distributed horizontal pipes; A retractable bellows is provided at the lower end of the vertical oil pipe; A bottom oil pipe is installed at the lower end of the telescopic corrugated pipe. The lower end of the bottom oil pipe extends to the bottom of the transformer oil tank. Multiple oil suction notches are provided around the lower end of the bottom oil pipe.

6. The oil-immersed transformer according to claim 5, characterized in that, The lower end of the tapered oil pipe penetrates the top of the transformer oil tank, and a sealing detection component is provided between the tapered oil pipe and the upper surface of the transformer oil tank. The sealing detection component includes a fixing ring, a flange, a transparent layer, an annular strip, and a vision detector. The fixing ring is sleeved on the tapered oil pipe, the flange is sleeved on the outside of the tapered oil pipe and fixed to the upper surface of the transformer oil tank, the transparent layer is fixed between the fixing ring and the flange, the annular strip is located inside the transparent layer, and the vision detector is embedded in the upper surface of the flange.

7. The oil-immersed transformer according to claim 1, characterized in that, The top of the oil storage tank is equipped with an oil extraction pipe, which is used to connect to an external oil pump.

8. The oil-immersed transformer according to claim 1, characterized in that, The bottom of the oil storage tank is symmetrically provided with two arc-shaped bottom plates, the outer ends of which are located at the inner wall of the fixed spacer ring.

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