Oil-immersed transformer

Abstract

The invention provides an oil-immersed transformer, and relates to the technical field of transformers, the oil-immersed transformer comprises a variable-pressure oil tank and a scrap removing and cooling structure, the scrap removing and cooling structure is mounted at the top of the variable-pressure oil tank and comprises a distribution pipe fitting, an oil storage barrel, a separation component and an adsorption component, the distribution pipe fitting is communicated with the oil storage barrel and the variable-pressure oil tank, and the oil storage barrel sucks oil in the variable-pressure oil tank; a fixed spacer ring is embedded in the oil storage cylinder, a lower oil pipe communicated with the distribution pipe fitting is arranged in the center of the bottom of the oil storage cylinder, and the separation component is vertically installed on the inner surface of the fixed spacer ring, located above the lower oil pipe and used for separating and filtering oil entering the oil storage cylinder; the adsorption components are distributed on the outer side of the fixed spacer ring, make contact with the outer circumferential face of the fixed spacer ring and are used for adsorbing the separated scrap iron. And when the separation component is impacted by oil entering the lower oil pipe, the separation component rotates to centrifugally act the oil on the inner wall of the fixed spacer ring. According to the invention, the mutual influence degree of scrap iron and circularly flowing oil can be reduced.

Description

Technical Field

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

[0002] An oil-immersed transformer is a type of electrical equipment with insulating oil as its core medium. It achieves voltage conversion through electromagnetic induction and is widely used in power transmission, industrial and mining enterprises, rail transit and other fields. Its core features include efficient heat dissipation, excellent insulation performance and low-noise operation.

[0003] For example, patent document CN118969453B discloses an oil-immersed transformer, which includes an oil tank and a foot connected to the bottom of the oil tank. A winding is arranged in the oil tank. The outside of the oil tank is connected to an oil pillow through an oil inlet pipe, and the outer wall of the oil tank is provided with equidistant arrays of heat dissipating fins. The bottom of the oil tank is connected to an oil drain pipe. It also includes a cleaning component for removing dust from the surface of the heat dissipating fins and a dredging component for preventing blockage of the oil inlet pipe and the oil drain pipe. The dredging component and the cleaning component operate synchronously.

[0004] However, after the oil pipe is cleared in the above patent document, the cleared iron filings impurities will remain in the oil tank, and may form irregular vortex flow in the iron filings area as the oil flows. The irregular vortex flow of the oil will cause it to spin in the iron filings area, affecting the oil's outward flow of heat, causing serious local aging of the oil, affecting the cooling effect inside the transformer, and directly removing the iron filings from the oil by filtering. As the oil circulates and cools, it is easy to carry the iron filings back into the oil tank, affecting the oil's heat dissipation effect on the entire transformer. Summary of the Invention

[0005] Based on this, the object of the present invention is to provide an oil-immersed transformer, aiming to ensure good heat dissipation efficiency while reducing the degree of interaction between iron filings and circulating oil.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: an oil-immersed transformer, comprising a transformer oil tank and a chip removal cooling structure, wherein multiple groups of windings are arranged inside the transformer oil tank, and the chip removal cooling structure is installed on the top of the transformer oil tank, and the chip removal cooling structure is used to cool the internal oil of the transformer oil tank and remove iron chips, and the chip removal cooling structure includes a distribution pipe, an oil storage cylinder, a separation component, and an adsorption component, wherein the distribution pipe is used to connect the oil storage cylinder with the transformer oil tank, and the oil storage cylinder is used to suck the internal oil of the transformer oil tank, and the storage cylinder is used to suck the internal oil of the transformer oil tank. A fixed spacer ring is embedded in the oil cylinder, and a lower oil pipe connected to the distribution pipe is provided at the bottom center of the oil storage cylinder. The separation component is vertically installed on the inner surface of the fixed spacer ring and is located above the lower oil pipe, and is used to separate and filter the internal oil entering the oil storage cylinder. The adsorption component is distributed on the outside of the fixed spacer ring and is in contact with the outer circumferential surface of the fixed spacer ring, and is used to adsorb the separated iron filings; wherein, when the separation component is impacted by the incoming oil from the lower oil pipe, the separation component rotates and centrifuges the oil to the inner wall of the fixed spacer 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 mounted 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 mounted on the lower end of the electric telescopic rod. The turbine blades are provided in multiple groups, and the multiple groups of turbine blades are arranged in an array along the circumference of the mounting block. The annular scraper is fixedly sleeved on the outer ends of 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, a telescopic inner rod is provided inside the electric telescopic rod, and a sealed telescopic tube is sleeved on the outer side 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, and 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. There are multiple electromagnetic tubes, and they are all embedded in the interior of the stabilizing ring. The electromagnetic tubes are circumferentially distributed on the outside of the fixed spacer ring, and the inner ends of the electromagnetic tubes contact the outer circumferential surface of the fixed spacer ring.

[0011] Furthermore, a plurality of cooling plates are fitted on the outer circumferential surface of the fixed spacer ring, and an energy supply box is provided on the outer surface of the lower end of the cooling plate.

[0012] Furthermore, an oil inlet component is provided inside the lower oil pipe, and the oil inlet component includes an embedded block, a lower limit ring, a rotating circular plate, and an arc-shaped load-bearing block. The embedded block is provided on the inner wall of the lower oil pipe, and the lower limit ring is provided on the inner wall of the lower oil pipe and is located below the embedded block. The rotating circular plate is horizontally located above the lower limit 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 fittings include a conical oil pipe, a distribution cross pipe, a vertical oil pipe, a retractable telescopic bellows, and a bottom oil pipe. The conical oil pipe is fixedly sleeved on the outside of the lower oil pipe, the distribution cross pipe is arranged at the lower end of the conical oil pipe, and there are multiple vertical oil pipes, which are all connected to the distribution cross pipe. The telescopic bellows is arranged at the lower end of the vertical oil pipe, and the bottom oil pipe is installed at the lower end of the telescopic bellows. The lower end of the bottom oil pipe extends to the bottom of the transformer oil tank, and a plurality of oil suction notches are opened on the circumference of the lower end of the bottom oil pipe.

[0014] Furthermore, the lower end of the conical oil pipe passes through the top of the transformer oil tank, and a sealing detection component is provided between the conical 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 visual identifier. The fixing ring is sleeved on the conical oil pipe, the flange is sleeved on the outside of the conical 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 provided on the inner side of the transparent layer, and the visual identifier is embedded in the upper surface of the flange.

[0015] Furthermore, an oil extraction pipe is provided on the top of the oil storage cylinder, and the oil extraction pipe is used to be connected to an external oil pump.

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

[0017] 1. The present invention can separate the oil and iron chips inside the transformer oil tank through the chip removal cooling structure during the oil circulation cooling process inside the transformer oil tank, so that the iron chips are adsorbed on the inner wall of the fixed spacer ring. During the adsorption process, the iron chips are further cooled by the cooled fixed spacer ring, and finally the oil transported outward through the oil extraction pipe returns to the transformer oil tank again. In this circulation process, since there is no interference from the iron chips, the heat dissipation of the internal winding is not affected. Moreover, the oil, which has been auxiliary cooled by the fixed spacer ring and the refrigeration plate, is transported to the external cooling system, which shortens the time it takes for the oil to reach the set cooling temperature, thereby improving the cooling effect inside the transformer.

[0018] 2. The present invention provides an oil inlet member, which does not affect the operation of pumping oil into the oil storage cylinder and prevents oil from flowing back into the transformer oil tank, thereby facilitating the separation of oil and iron chips. At the same time, the distribution pipes can be used to simultaneously pump oil at multiple locations in the transformer oil tank. The length of the pipe body can be extended to adapt to the depth of the transformer oil tank, thereby expanding the range of oil and iron chips suction inside the transformer oil tank.

[0019] 3. The present invention can perform a sealing detection function on the connection between the tapered oil pipe and the transformer oil tank by providing a sealing detection component. If oil leakage occurs, an alarm can be issued through a visual identifier, and the leakage 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 according to the identified oil color, which is convenient for timely detection and warning. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0023] Figure 4 For the present invention Figure 3 A longitudinal sectional view of the intermediate oil storage cylinder;

[0024] Figure 5 For the present invention Figure 4 A schematic diagram of the structure of the separated components from above;

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

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

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

[0028] Figure 9 For the present invention Figure 4 a cross-sectional view of the middle seal detection component;

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

[0030] Description of main component symbols:

[0031] 100, transformer oil tank; 101, fins; 102, windings; 200, chip removal and cooling structure; 201, oil reservoir; 2011, fixed spacer ring; 2012, curved bottom plate; 202, oil extraction pipe; 203, lower oil pipe; 204, distribution pipe fittings; 2041, tapered oil pipe; 2042, telescopic bellows; 2043, bottom oil pipe; 2044, load-bearing ring; 2045, oil suction notch; 2046, vertical oil pipe; 205, mounting plate; 206, heat dissipation hole; 207, adsorption member; 2071, stabilizing ring; 2072, electromagnetic tube; 2073, energy 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, visual identifier; 305, annular strip;

[0032] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0033] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The drawings illustrate several embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present 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] See also Figures 1 to 7 The present application provides an oil-immersed transformer, comprising a transformer oil tank 100 and a chip removal cooling structure 200. The transformer oil tank 100 is internally provided with multiple windings 102, and its outer surface is provided with fins 101, which further dissipate heat from the transformer oil tank 100. The chip removal cooling structure 200 is mounted on top of the transformer oil tank 100 and is used to cool the oil inside the transformer oil tank 100 and remove iron chips.

[0038] Specifically, the chip removal cooling structure 200 includes a distribution pipe 204, an oil storage cylinder 201, a separation member 208, and an adsorption member 207. A mounting plate 205 is provided between the oil storage cylinder 201 and the transformer oil tank 100 to ensure sufficient space between the two. The distribution pipe 204 is used to connect the oil storage cylinder 201 and the transformer oil tank 100. The oil storage cylinder 201 is used to suck the oil inside the transformer oil tank 100 through the distribution pipe 204. A fixed spacer ring 2011 is embedded in the oil storage cylinder 201. Preferably, the fixed spacer ring 2011 is an iron ring, which can both conduct temperature and facilitate the adsorption of iron chips. Adsorption member 207 is located outside of fixed spacer ring 2011 and contacts its outer circumference, creating an oil storage space between the interior of fixed spacer ring 2011 and the upper and lower surfaces of oil reservoir 201. A lower oil pipe 203, connected to distribution pipe 204, is located at the bottom center of oil reservoir 201. Separation member 208 is vertically mounted on the inner surface of fixed spacer ring 2011, above lower oil pipe 203, located at the bottom center of oil reservoir 201. Oil entering from lower oil pipe 203 causes separation member 208 to rotate, centrifuging the oil onto the inner wall of fixed spacer ring 2011. During the oil centrifugation process, iron filings are adsorbed on the inner wall of fixed spacer ring 2011, and the centrifuged oil contacts fixed spacer ring 2011 in a more dispersed manner, making it easier to cool the oil. Furthermore, the rotating separation member 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 chips are separated by the chip removal cooling structure 200 , so that the iron chips are adsorbed on the inner wall of the fixed spacer ring 2011 .

[0040] In this embodiment, preferably, the separation member 208 for rotationally separating the oil sucked into the oil storage cylinder 201 includes a separation filter plate 2081 , a mounting block 2084 , turbine blades 2085 , and an annular scraper 2086 .

[0041] Specifically, separation filter plate 2081 is mounted horizontally on the inner wall of fixed spacer ring 2011. Small holes are distributed across the surface of separation filter plate 2081. These holes allow oil to pass through separation filter plate 2081 and be drawn into oil extraction pipe 202, while also preventing iron filings from passing through. It should be noted that the oil extraction pipe 202 in the accompanying drawings is a truncated view, and does not necessarily represent the exact length of the drawing.

[0042] The free end of the oil extraction pipe 202 is connected to an external oil pump, thereby facilitating the circulation and suction of the oil within the transformer oil tank 100. A rotatable electric telescopic rod 2082 is vertically mounted at the center of the separation filter plate 2081. A rotating bearing 2083 is embedded between the electric telescopic rod 2082 and the separation filter plate 2081 to prevent interference with the rotation of the turbine blades 2085. A mounting block 2084 is mounted at the lower end of the electric telescopic rod 2082. Multiple groups of turbine blades 2085 are arranged in an array along the circumference of mounting block 2084. Oil entering oil reservoir 201 impacts turbine blades 2085, causing them to rotate, driving the multiple turbine blades 2085 to rotate. The rotating turbine blades 2085 exert a centrifugal force on the oil, causing it to centrifugally swirl outward and contact the inner wall of fixed spacer ring 2011. This not only facilitates the absorption and separation of iron filings from the oil, but also provides a thinner edge for the oil to contact the inner wall of fixed spacer ring 2011, further cooling it. Annular scrapers 2086 are fixedly mounted on the outer ends of the multiple turbine blades 2085, with their outer surfaces contacting the inner wall of fixed spacer ring 2011. The scrapers 2086 do not affect the rotation of the multiple turbine blades 2085, but can also be extended and retracted downward in conjunction with the electrically operated telescopic rod 2082, thereby scraping and pushing down any iron filings remaining on the inner wall of fixed spacer ring 2011 that cannot fall directly.

[0043] In this embodiment, preferably, a retractable inner rod 2087 is provided inside the electric telescopic rod 2082, and a sealed telescopic tube 2088 is provided on the outside of the inner rod 2087. The sealed telescopic tube 2088 neither affects the telescopic movement of the inner rod 2087 nor prevents oil from entering the interior of the electric telescopic rod 2082. The upper and lower ends of the sealed 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. The inner rod 2087 is in a retracted state in the initial position. At this time, the upper end of the turbine blade 2085 is in contact with the lower surface of the separation filter plate 2081.

[0044] In this embodiment, a cavity is preferably formed between the outer surface of the stationary spacer 2011 and the inner wall of the oil reservoir 201. The cavity prevents the oil from entering the stationary spacer 2011, and the adsorption member 207 is mounted in the cavity. Specifically, the adsorption member 207 includes a stabilizing ring 2071 and an electromagnetic tube 2072. The stabilizing ring 2071 is mounted in the cavity, and multiple electromagnetic tubes 2072 are provided, each embedded within the stabilizing ring 2071. The stabilizing ring 2071 facilitates simultaneous mounting and securing of multiple electromagnetic tubes 2072. The electromagnetic tubes 2072 are circumferentially distributed around the outer surface of the stationary spacer 2011, with their inner ends contacting the outer circumference of the stationary spacer 2011. The magnetic attraction generated by the electromagnetic tubes 2072 is transmitted to the surface of the stationary spacer 2011, thereby adsorbing iron filings mixed with the oil acting on the inner wall of the stationary spacer 2011. It is understandable that the magnetic attraction of the electromagnetic tube 2072 on the iron chips is greater than the centrifugal force of oil separation, so the iron chips will not be separated from the fixed spacer ring 2011 again.

[0045] In this embodiment, preferably, a plurality of cooling plates 2074 are attached to the outer circumference of the fixed spacer ring 2011. The cooling plates 2074 are semiconductor plates. An energy supply box 2073 is provided on the outer surface of the lower end of the cooling plate 2074. The cooling plates 2074 are electrically connected to the energy supply box 2073. Heat dissipation holes 206 are provided on the surface of the oil reservoir 201 at the cooling plates 2074 to facilitate heat dissipation from the cooling plates 2074. When the cooling plates 2074 are in operation, the side of the cooling plates 2074 attached to the fixed spacer ring 2011 cools and absorbs heat, and transfers the heat to the surface of the fixed spacer ring 2011. The other side of the cooling plates 2074, which is opposite to the cooling plates 2074, releases heat and transfers the heat to the outside world in conjunction with the corresponding heat dissipation holes 206. It should be noted that the detailed operating principle of the cooling plates 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 chips are separated by the chip removal cooling structure 200, so that the iron chips are adsorbed on the inner wall of the fixed spacer ring 2011, and the iron chips are further cooled by the fixed spacer ring 2011 cooled by the refrigeration plate 2074 during the adsorption process, and finally the oil transported outward through the oil extraction pipe 202 is returned to the transformer oil tank 100 again. In this circulation process, since there is no interference from the iron chips, the heat dissipation of the internal winding 102 will not be affected, and the oil transported to the external cooling system after auxiliary cooling by the fixed spacer ring 2011 and the refrigeration plate 2074 will shorten the time to reach the set cooling temperature of the oil, that is, the refrigeration plate is used to cool the oil. 2074 assists in cooling the centrifugal oil. After the centrifugal oil is assisted in cooling, it will continue to be pumped and transported to the external cooling system to continue cooling. For example, if the oil needs to be cooled to 10°C, and the oil that carries heat for circulating cooling of the transformer has an overall temperature of 30°C, then the oil will be assisted in cooling to 25°C through the cooperation of the refrigeration plate 2074 and the fixed spacer ring 2011. The time required for the 25°C oil to be cooled to 10°C in the cooling system is shorter than the time required to directly cool it from 30°C to 10°C, so that the oil reaches the required cooling temperature faster, thereby improving the cooling efficiency, so that it can enter the transformer again for cooling faster, thereby improving the cooling efficiency of the entire transformer. It should be noted that the cooling temperature of the oil in this application is for illustration only. The specific temperature of the oil needs to be set according to the actual production needs and does not represent a unique and fixed value.

[0047] In summary, the turbine blades 2085 are initially located on the lower surface of the separation filter plate 2081, and the oil pump connected to the oil extraction pipe 202 is working to suck the oil in the transformer oil tank 100 into the oil storage cylinder 201 through the distribution pipe 204. After being impacted by the oil, the oil inlet component 209 opens, and the oil in the oil storage cylinder 201 acts on the turbine blades 2085. The turbine blades 2085 are forced to rotate, generating centrifugal force on the oil, and the oil is dispersed outward to act on the inner wall of the fixed spacer ring 2011. At this time, the electromagnetic tube 2072 and the refrigeration plate 2074 are working. The surface of the refrigeration plate 2074 that is in contact with the fixed spacer ring 2011 is the refrigeration surface, which conducts the low temperature to the fixed spacer ring 2011, thereby cooling the oil in contact with the fixed spacer ring 2011. As the turbine blades 2085 rotate, the oil continues to cool down, and the rotation allows the cooled oil to mix with the uncooled oil that continues to enter. At the same time, the iron chips in the oil that contacts the fixed spacer ring 2011 are transferred to the magnetic adsorption on the fixed spacer ring 2011 and fixed, so that the oil will not carry iron chips again after it leaves the fixed spacer ring 2011. When the oil moves upward with suction, some iron chips that have not been completely removed are filtered by the separation filter plate 2081, so that the upward flowing oil will not be mixed with iron chips. During the rotation of the turbine blades 2085, the iron chips attached to the lower surface of the separation filter plate 2081 will be scraped, and the iron chips will be thrown to the inner wall of the fixed spacer ring 2011 by the centrifugal rotation, and then adsorbed on the inner wall of the fixed spacer ring 2011. Since the turbine blades 2085 continuously scrape the surface of the separation filter plate 2081, the separation filter plate 2081 will not be blocked, thereby achieving continuous flow of oil. After the oil suction is completed and no further suction is needed, the oil inlet component 209 is closed to stop the entry of oil. At this time, the turbine blades 2085 stop rotating, the electromagnetic tube 2072 also stops working, and the adsorption force of the fixed spacer ring 2011 on the iron chips by the electromagnetic adsorption is removed. The iron chips on the fixed spacer ring 2011 fall downward due to gravity, and the iron chips still remaining on the inner wall of the fixed spacer ring 2011 can be removed by the electromagnetic adsorption. The telescopic rod 2082 works, specifically, the inner rod 2087 inside the electric telescopic rod 2082 extends, and the sealed telescopic tube 2088 unfolds, driving the turbine blades 2085 and the annular scraper 2086 to move downward, pushing the iron filings attached to the inner wall of the fixed spacer ring 2011 downward and onto the curved bottom plate 2012. The curved bottom plate 2012 can be disassembled later, and sealing measures such as sealing rubber strips are provided between the curved bottom plate 2012 and the oil storage cylinder 201, so that no leakage will occur. At the same time, it is also convenient to disassemble the curved bottom plate 2012, so that the iron filings can be taken out and cleaned.

[0048] Example 2

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

[0050] In this embodiment, an oil inlet member 209 is preferably provided within the lower oil pipe 203 at the bottom of the oil reservoir 201. This member neither interferes with the pumping of oil into the oil reservoir 201 nor prevents oil from flowing back into the transformer oil tank 100. Specifically, the oil inlet member 209 includes an embedded block 2092, a lower stop ring 2091, a rotating circular plate 2093, and an arc-shaped bearing block 2094. An insert block 2092 is disposed on the inner wall of the lower oil pipe 203. A lower stop ring 2091 is disposed on the inner wall of the lower oil pipe 203 and is located below the insert block 2092. A rotating circular plate 2093 is horizontally positioned above the lower stop ring 2091. One end of the rotating circular plate 2093 is rotatably connected to the insert block 2092. 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 that of the lower oil pipe 203. A notch is provided on the upper surface of the lower stop ring 2091 for the rotating circular plate 2093 to rotate around the insert block 2092, thereby facilitating the rotating circular plate 2093 to rotate within the lower oil pipe 203 within an acute angle. The inner diameter of the lower stop ring 2091 is smaller than that of the rotating circular plate 2093, thereby preventing oil from entering the oil reservoir 201. At the same time, the lower limiting ring 2091 can limit the rotating circular plate 2093 so that the rotating circular plate 2093 will not rotate downward.

[0051] In this embodiment, when there is no need to pump oil again, the rotating circular plate 2093 is rotated downward and reset under the action of the gravity of the arc-shaped load-bearing block 2094 and the oil in the oil storage cylinder 201. 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 at this time, and the oil in the oil storage cylinder 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 to the inside of the transformer oil tank 100. Specifically, the distribution pipe 204 includes a conical oil pipe 2041, a distribution horizontal pipe, a vertical oil pipe 2046, a retractable bellows 2042, and a bottom oil pipe 2043.

[0053] Among them, the tapered oil pipe 2041 is fixedly sleeved on the outside of the lower oil pipe 203, and a distribution cross pipe is provided at the lower end of the tapered oil pipe 2041. The two form a T shape, which is convenient for the installation and distribution of the vertical oil pipe 2046. There are multiple vertical oil pipes 2046, and they are all connected to the distribution cross pipe. The telescopic bellows 2042 is provided at the lower end of the vertical oil pipe 2046. The length of the telescopic bellows 2042 is telescopic and does not affect the oil suction; the bottom oil pipe 2043 is installed at the telescopic bellows 2042. At the lower end, the lower end of the bottom oil pipe 2043 extends to the bottom of the transformer oil tank 100. A load-bearing ring 2044 is fixed on the bottom oil pipe 2043. Under the action of gravity of the load-bearing ring 2044, the bottom oil pipe 2043 can be driven to move downward, and the telescopic bellows 2042 gradually expands until the bottom oil pipe 2043 contacts the bottom of the transformer oil tank 100. A plurality of oil suction notches 2045 are opened on the circumference of the lower end of the bottom oil pipe 2043 to facilitate the suction of oil at the bottom of the transformer oil tank 100.

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

[0055] In summary, during use, when oil is pumped from the transformer oil tank 100, the bottom oil pipe 2043 contacts the bottom of the transformer oil tank 100, and oil enters the distribution pipe 204 through the oil suction notch 2045. The oil then flows upward and impacts the rotating circular plate 2093, causing 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 continue to enter the oil reservoir 201. When oil pumping is no longer required, the arc-shaped bearing 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 the rotating circular plate 2093 from continuing to rotate downward. It is understood that the gravity of the arc-shaped bearing 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 , which is the third embodiment of the present invention.

[0058] In this embodiment, preferably, the lower end of the conical oil pipe 2041 passes through the top of the transformer oil tank 100, and a sealing detection component 300 is provided between the conical 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, a ring strip 305, and a visual identifier 304.

[0059] The retaining ring 302 is fixedly mounted on the tapered oil pipe 2041. The flange 301 is mounted 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 bolted to the surface of the transformer oil tank 100 for easy assembly and disassembly. 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 visibility of the internal ring strip 305 and acts as a sealing film to prevent oil leakage. Optionally, the transparent layer 303 can be a transparent polyethylene film. The ring strip 305 is located inside the transparent layer 303. The ring strip 305 is a white cotton strip with good adsorption capacity and can easily display the color of the oil. The visual identifier 304 is embedded in the upper surface of the flange 301, allowing easy identification of the colors of the transparent layer 303 and the ring strip 305.

[0060] In this embodiment, by providing a sealing detection component 300, a sealing detection function can be performed on the connection between the conical oil pipe 2041 and the transformer oil tank 100. If oil leakage occurs, a warning can be issued through the visual identifier 304, and the leakage 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 internal oil of the transformer oil tank 100 can be analyzed based on the identified oil color, which is convenient for timely detection and warning.

[0061] In this embodiment, preferably, an oil extraction pipe 202 is provided on the top of the oil storage cylinder 201 , and 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 provided at the bottom of the oil storage cylinder 201, and the outer ends of the arc-shaped bottom plates 2012 are located at the inner wall of the fixed spacer ring 2011, so that iron filings attached to the inner wall of the fixed spacer ring 2011 can fall directly onto the arc-shaped bottom plates 2012.

[0063] In summary, when in use, the sealing detection component 300 is installed between the tapered oil pipe 2041 and the transformer oil tank 100. If oil leakage occurs between the two, the leaked oil will be absorbed by the annular strip 305, and the cotton strip that absorbs the oil will change color. The discolored cotton strip will be detected by the visual identifier 304. The visual identifier 304 can be an industrial camera or other camera equipment, and equipped with an existing visual recognition system to identify the color change of the detected annular strip 305, and transmit the detected data to the outside and issue an alarm. The cooperation between the visual recognition system and the visual identifier 304 to detect oil leakage or color change is a prior art and will not be described in detail in this application. In addition, if an oil leak occurs at the connection, it can also be judged whether the oil in the transformer oil tank 100 is aged based on the color of the identified oil, thereby improving the sealing detection effect of the oil in the transformer oil tank 100, and this sealing detection component 300 can be installed at the connection of similar structures, such as between the pipe and the box, to improve the detection range of oil leakage.

[0064] Example 4

[0065] This embodiment is obtained by combining the first embodiment, the second embodiment and the third embodiment.

[0066] During use, the oil in the transformer oil tank 100 is sucked into the oil storage cylinder 201 through an external oil pump, and the oil and iron chips are centrifugally separated by the separation component 208. The separated iron chips are adsorbed by the adsorption component 207, and the separated oil is further cooled by the refrigeration plate 2074, shortening the time for the oil to enter the external refrigeration system for cooling. Without the influence of iron chips, it is not easy to form vortex flow inside the transformer oil tank 100, thereby improving the fluidity of the oil and the heat dissipation and cooling effect inside the transformer oil tank 100, and 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] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations 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 any one or more embodiments or examples.

[0068] The above-described embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of the present invention. Therefore, the scope of the present invention shall be determined by the appended claims.

Claims

1. An oil-immersed transformer, characterized in that: The oil-immersed transformer comprises: A transformer oil tank, wherein a plurality of windings are arranged inside the transformer oil tank; A chip removal and cooling structure is installed on the top of the transformer oil tank, and is used to cool the oil inside the transformer oil tank and remove iron chips. The chip removal and cooling structure includes a distribution pipe, an oil storage cylinder, a separation component, and an adsorption component; The distribution pipe is used to connect the oil storage cylinder and the transformer oil tank; The oil storage cylinder is used to suck the oil inside the transformer oil tank. A fixed spacer ring is embedded in the oil storage cylinder. A lower oil pipe connected to the distribution pipe is provided at the center of the bottom of the oil storage cylinder. The separation member is vertically mounted on the inner surface of the fixed spacer ring and is located above the lower oil pipe, and is used to separate and filter the internal oil entering the oil storage cylinder; The adsorption member is distributed outside the fixed spacer ring and contacts the outer circumferential surface of the fixed spacer ring, and is used to adsorb the separated iron chips; When the separation member is impacted by the oil entering from the lower oil pipe, the separation member rotates to centrifugally act on the oil to the inner wall of the fixed spacer ring.

2. The oil-immersed transformer according to claim 1, characterized in that: The separation member comprises: A separation filter plate is horizontally mounted on the inner wall of the fixed spacer ring, and a rotatable electric telescopic rod is vertically arranged at the center of the separation filter plate; A mounting block mounted on the lower end of the electric telescopic rod; Turbine blades are provided in a plurality of groups, and the plurality of groups of turbine blades are arranged in an array along the circumference of the mounting block; An annular scraper is fixedly sleeved on the outer ends of the plurality of turbine blades, and the outer surface of the annular scraper is in contact with the inner wall of the fixed spacer ring.

3. The oil-immersed transformer according to claim 2, characterized in that: A telescopic inner rod is provided inside the electric telescopic rod, and a sealed telescopic tube is sleeved outside 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.

4. The oil-immersed transformer according to claim 1, characterized in that: 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 member is installed in the cavity. The adsorption member includes: a stabilizing ring installed in the cavity; There are multiple electromagnetic tubes, which are all embedded and installed inside the stabilizing ring. The electromagnetic tubes are circumferentially distributed outside the fixed spacer ring, and the inner ends of the electromagnetic tubes contact the outer circumferential surface of the fixed spacer ring.

5. The oil-immersed transformer according to claim 4, characterized in that: A plurality of cooling plates are provided on the outer circumferential surface of the fixed spacer ring, and an energy supply box is provided on the outer surface of the lower end of the cooling plate.

6. The oil-immersed transformer according to claim 1, characterized in that: An oil inlet component is provided inside the lower oil pipe, and the oil inlet component includes: An embedded block is provided on the inner wall of the lower oil pipe; a lower limiting ring, provided on the inner wall of the lower oil pipe and located below the embedded block; A rotating circular plate is horizontally located above the lower limit ring, and one end of the rotating circular plate is rotatably connected to the embedded block; The arc-shaped load-bearing block is embedded in the other end of the rotating circular plate.

7. The oil-immersed transformer according to claim 1, characterized in that: The distribution pipe fittings include: The tapered oil pipe is fixedly sleeved on the outer side of the lower oil pipe. a distribution transverse pipe, arranged at the lower end of the tapered oil pipe; There are multiple vertical oil pipes, all of which are connected to the distribution horizontal pipe; a retractable bellows, disposed at the lower end of the vertical oil pipe; The bottom oil pipe is installed at the lower end of the telescopic bellows. The lower end of the bottom oil pipe extends to the bottom of the transformer oil tank. A plurality of oil suction notches are opened on the circumference of the lower end of the bottom oil pipe.

8. The oil-immersed transformer according to claim 7, characterized in that: The lower end of the conical oil pipe passes through the top of the transformer oil tank, and a sealing detection component is provided between the conical 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 visual identifier. The fixing ring is sleeved on the conical oil pipe, the flange is sleeved on the outside of the conical 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 provided on the inner side of the transparent layer, and the visual identifier is embedded in the upper surface of the flange.

9. The oil-immersed transformer according to claim 1, characterized in that: An oil extraction pipe is provided on the top of the oil storage cylinder, and the oil extraction pipe is used to be connected to an external oil pump.

10. The oil-immersed transformer according to claim 1, characterized in that: Two arc-shaped bottom plates are symmetrically arranged at the bottom of the oil storage cylinder, and the outer ends of the arc-shaped bottom plates are located at the inner wall of the fixed spacer ring.

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