Oil-immersed power transformer

Abstract

The invention discloses an oil-immersed power transformer, and relates to the technical field of transformers, the oil-immersed power transformer comprises a support, the top end of the support is fixedly connected with a bottom box, the top end of the bottom box is fixedly connected with a transformation end shell, the front side and the rear side of the transformation end shell are both provided with fin structures, and the transformation end shell is internally provided with a circulation mechanism; a liquid circulation mechanism is arranged below the circulation mechanism, a liquid leakage detection mechanism is arranged above the circulation mechanism, an oil pump is arranged in the bottom box, and a liquid pumping pipe is connected to the side face of the oil pump. The circulating mechanism comprises two outer frame pipes, the two outer frame pipes are fixedly connected to the two sides of the support respectively, and the interior of the transformation end shell is fixedly connected with two communicating transverse frames. According to the invention, the temperature of the side bow frame can be quickly dissipated, the heat dissipation effect of the side bow frame is promoted, and the service life of the side bow frame is prolonged. And the heat dissipation efficiency of insulating oil around the side bow rack is improved.

Description

Technical Field

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

[0002] Oil-immersed power transformer is a common type of transformer, which is widely used in power systems for increasing or decreasing voltage. Its main feature is that it provides insulation and cooling functions through insulating oil, which is generally used to provide insulation and cooling functions.

[0003] The patent with announcement number CN117877863 transformer discloses an oil-immersed power transformer with high efficiency in heat dissipation, including a box and an oil pillow; a winding is arranged in the box; a partition plate is arranged in the box; the partition plate divides the box into an upper cavity and a lower cavity; the oil pillow is connected to the upper cavity; a plurality of heat dissipation mechanisms are arranged on the periphery of the box; the heat dissipation mechanism includes fixed fins and movable fins; the movable fins are movable and retractable and arranged on the fixed fins; an oil storage cavity is formed between the fixed fins and the movable fins; the oil storage cavity is connected to the lower cavity; the heat dissipation mechanism also includes a driving component for driving the movable fins to retract and retract the fixed fins. The patent forms a heat dissipation system between the upper cavity and the oil pillow, and another heat dissipation system is formed between the lower cavity and the heat dissipation mechanism. The two heat dissipation systems alternately circulate to cool and dissipate the winding, which can greatly improve the heat dissipation performance of the power transformer. However, the patent has the problem that heat dissipation requires the help of a driving component, and the driving component will also generate heat when working, affecting the actual heat dissipation effect. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present application provides an oil-immersed power transformer, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present application is implemented through the following technical solutions: an oil-immersed power transformer, comprising a bracket, the top of the bracket is fixedly connected to a bottom box, the top of the bottom box is fixedly connected to a transformer end shell, the front and rear sides of the transformer end shell are both provided with fin structures, a circulation mechanism is provided inside the transformer end shell, a liquid circulation mechanism is provided below the circulation mechanism, a liquid leakage detection mechanism is provided above the circulation mechanism, an oil pump is provided inside the bottom box, and a liquid extraction pipe is connected to the side of the oil pump; According to the above technical scheme, the circulation mechanism includes an outer frame tube, two of which are provided, and the two outer frame tubes are fixedly connected to the two sides of the bracket respectively, and the inside of the transformer end shell is fixedly connected with two connecting cross frames, and the outer side of the connecting cross frame is fixedly connected with a positioning plate, and the lower part of the positioning plate is fixedly connected with a coil, and the front and rear sides of the connecting cross frame are fixedly connected with four side bow frames, and the side of the side bow frame away from the connecting cross frame is fixedly connected with six thin horizontal square tubes, and both ends of each thin horizontal square tube are fixedly connected with connecting tube fins, and the middle part of the outer side of the outer frame tube is fixedly connected with the air filling end shell; According to the above technical solution, the air filling end shell includes a guide block, the guide block is fixedly connected to the middle of the inner wall of the outer frame tube, the side of the guide block is provided with a blast blade, the inner wall of the air filling end shell is fixedly connected with a closed wind arc plate, the inner side of the closed wind arc plate is provided with an air filling impeller, and the interior of the air filling end shell is provided with an air filling channel; According to the above technical scheme, a connecting square hole is provided on the outer wall of the transformer end shell, and the connecting square hole is connected with the outer frame tube, the connecting square hole is connected with the connecting cross frame, the side arch frame is connected with the connecting cross frame, the thin cross square tube is connected with the connecting tube fin, the blast blade is rotatably connected with the outer frame tube, the air impeller is fixedly connected with the blast blade axis, when the outside air flows through the connecting tube fins, the air will enter the air filling end shell, the flowing air will pass through the air filling impeller, and flow into the air filling channel from the outer wall of the air filling impeller, so that the air in the air filling channel is discharged, in this process, the air flow through the air filling impeller will make it rotate, and the rotation of the air filling impeller will drive the connected blast blade fitting guide block to rotate, and the rotation of the blast blade will transport the compressed gas in the outer frame tube downward, so that the air in the outer frame tube flows To the connecting cross frame, and then through the connecting cross frame to make the air flow to another outer frame tube, the air flows upward through the outer frame tube and enters the connecting cross frame located above to realize circulation flow. When the air passes through the connecting tube fins, the connecting tube fins will cool the air in the outer frame tube. At the same time, the air in the connecting cross frame enters the side bow frame, so that the side bow frame can cool the surrounding liquid and improve the cooling effect of the insulating oil inside the transformer end shell. At the same time, the connecting cross frame is used to take away the heat generated by the coil on the positioning piece after power is turned on through the internal flowing air. In addition, the connecting tube fins will absorb the heat of the connected thin horizontal square tubes through the flow of external air, and use the thin horizontal square tubes to contact the side bow frame to absorb the heat of the side bow frame, so that the temperature of the side bow frame can be quickly dissipated, which promotes the heat dissipation effect of the side bow frame and improves the heat dissipation efficiency of the insulating oil around the side bow frame.

[0006] According to the above technical solution, the fin structure includes a connecting end, a side of the connecting end away from the transformer end shell is fixedly connected with a plurality of square ring fins, and the inner sides of the plurality of square ring fins are fixedly connected with a connecting air duct; According to the above technical scheme, the liquid circulation mechanism includes a U-arc cavity plate, the front and rear sides of the inner wall of the U-arc cavity plate are fixedly connected with a drum liquid wheel plate, the side of each drum liquid wheel plate is rotatably connected with two drum liquid blades, the bottom surface of the drum liquid wheel plate is fixedly connected with a liquid inlet port, the top surface of the drum liquid wheel plate is provided with a liquid outlet port, the top surface of the U-arc cavity plate is provided with a liquid discharge port, each drum liquid blade is fixedly connected with a rotating handle at the rotating shaft, the outer side of the drum liquid blade is rotatably connected with two pressure wheels, the outer side of the pressure wheel is provided with a liquid outlet connecting pipe, one end of the liquid outlet connecting pipe is fixedly connected with a liquid inlet connecting pipe, and the other end of the liquid outlet connecting pipe is fixedly connected to one of the side arch frames, and the end of the liquid inlet connecting pipe away from the liquid outlet connecting pipe is fixedly connected to the other side arch frame; According to the above technical solution, the bottom surface of the connecting horizontal frame located at the bottom is fixedly connected with an alloy wire, the bottom end of the alloy wire is fixedly connected with a lifting end shell, both sides of the bottom surface of the lifting end shell are fixedly connected with metal contacts, the side of the oil pump is electrically connected with a power-carrying wire, the right inner wall of the bottom box is fixedly connected with a wiring wire, the top of the wiring wire and the power-carrying wire are fixedly connected with a power-carrying contact, the liquid outlet connecting pipe is connected with the liquid inlet connecting pipe, and the liquid inlet connecting pipe is connected with the side bow frame. When the temperature of the insulating oil inside the transformer end shell rises, it is connected with the insulating The alloy wire in contact with the oil is made of nickel-titanium alloy. It will shrink after absorbing the heat of the insulating oil. The shrunk alloy wire will pull the lifting end shell upward, causing the metal contact connected to the lifting end shell to move upward, so that the metal contact moves upward and contacts the energized contact. At this time, the energized wiring wire contacts the metal contact through the energized contact connected to the top, causing the metal contact to energize the energized contact connected to the energized wire through the lifting end shell. The energized energized contact guides the current to the oil pump, allowing the oil pump to be in working condition after being energized. When the oil pump starts working, the oil pump passes through the liquid extraction pipe. The insulating oil in the transformer end shell is pumped into the U-arc cavity plate, so that the insulating oil in the U-arc cavity plate flows upward, and the insulating oil in the U-arc cavity plate enters the drum liquid wheel plate through the liquid inlet port. The flowing insulating oil enters the drum liquid wheel plate to drive the drum liquid blade to rotate, and then the insulating oil in the drum liquid wheel plate is discharged to the top of the transformer end shell through the liquid outlet port and the drain port. In this process, the insulating oil on the side of the U-arc cavity plate enters the connecting end through the side of the U-arc cavity plate, and enters the square ring fins connected to the connecting end. When air passes through the connecting air duct, the connecting air duct will take away the square ring fins. The heat of the insulating oil in the fins, at the same time, allows the insulating oil inside the transformer end shell to flow from bottom to top, preventing the insulating oil from standing still and causing heat accumulation, affecting the efficiency of the coil in transmitting electrical energy. In addition, the rotation of the liquid-drum blade drives the connected rotating handle to rotate, so that the rotating handle drives the pressure wheel to squeeze the connection between the liquid outlet pipe and the liquid inlet pipe, so that the liquid outlet pipe and the liquid inlet pipe are pressurized to promote the flow of liquid in the liquid outlet pipe, and the air flow of the two side bow frames connected to the liquid inlet pipe and the liquid outlet pipe is drawn in, and the air flow in the above two side bow frames is improved, thereby promoting the flow frequency in the thin horizontal square tube connected to the side bow frames.

[0007] According to the above technical solution, the leakage detection mechanism includes a bending plate, and the bending plates are provided with four pieces, and the four bending plates are fixedly connected to the bottom surface of the top plate, and a buoyancy plate is provided between the bending plates at four places, and the top surface of the buoyancy plate is fixedly connected with a metal connecting piece, and the top surface of the metal connecting piece is fixedly connected with a card holder, and the top of the card holder is fixedly connected with a power connection piece, and metal cards are provided on both sides of the top of the card holder, and the top of the metal card is fixedly connected with an alarm, and an inlay groove is provided inside the top plate, and a cavity tube is fixedly connected to the edge side of the buoyancy plate; According to the above technical solution, a spring is provided at the bottom end of the bending plate, and the two ends of the spring are fixedly connected to the bending plate and the top plate respectively, the alarm is located inside the inlay groove, and the metal card penetrates from the bottom surface of the top plate to the inside of the inlay groove. When the insulating oil level inside the transformer end shell is normal, the buoyancy of the insulating oil liquid surface pushes the buoyancy plate and the cavity tube to apply force upward, so that the spring on the bending plate below the buoyancy plate is in a stretched state. At this time, the metal connecting piece on the buoyancy plate is in a clamping state with the metal card through the card seat. At this time, the buoyancy plate is stationary. When the transformer end shell leaks and decreases, the buoyancy plate and the bottom of the cavity tube are no longer supported by the buoyancy of the insulating oil, and the spring in a stretched state on the bending plate begins to shrink. The buoyancy plate is pulled downward by the contraction of the spring, so that the card seat is separated from the metal card, and the power connection piece connected to the card seat is moved between the metal cards, so that the metal card is in contact with the power connection piece. At this time, the alarm is in a passage state through the metal card and the power connection piece, so that an alarm is issued through the alarm to prevent the rubber ring from aging and leaking, resulting in equipment failure and environmental pollution.

[0008] The present application provides an oil-immersed power transformer. It has the following beneficial effects: The present application provides an outer frame tube, a connecting cross frame, a positioning piece, a coil, a side bow frame, a thin horizontal square tube, an air filling end shell, a guide block, a blast blade, an air closing arc plate, an air filling impeller, and an air filling channel, so that the side bow frame cools down the surrounding liquid, improves the cooling effect of the insulating oil inside the transformer end shell, and at the same time uses the connecting cross frame to take away the heat generated by the coil on the positioning piece after being energized through the internal flowing air. In addition, the connecting tube fins are cooled by the flow of external air, absorbing the heat of the connected thin horizontal square tubes, and the thin horizontal square tubes are used to contact the side bow frame to absorb the heat of the side bow frame, so that the temperature of the side bow frame can be quickly dissipated, the heat dissipation effect of the side bow frame is promoted, and the heat dissipation efficiency of the insulating oil around the side bow frame is improved; In the present application, a U-arc cavity plate, a liquid drum wheel plate, a liquid drum blade, a liquid inlet port, a liquid outlet port, a liquid discharge port, a rotating handle, a pressure wheel, a liquid outlet connecting pipe, a liquid inlet connecting pipe, a lifting end shell, an alloy wire, a metal contact sheet, and a wiring conductor are provided. The air duct will take away the heat of the insulating oil in the square ring fin. At the same time, the rotating handle drives the pressure wheel to squeeze the connecting part of the liquid outlet connecting pipe and the liquid inlet connecting pipe, so that the liquid outlet connecting pipe and the liquid inlet connecting pipe are pressed to promote the flow of liquid in the liquid outlet connecting pipe, and the air flow of the two side bow frames connected to the liquid inlet connecting pipe and the liquid outlet connecting pipe is sucked in. The air flow in the above-mentioned two side bow frames is improved, thereby promoting the flow frequency in the thin horizontal square tube connected to the side bow frames; The present application is provided with a bending plate, a buoyancy plate, a metal connecting piece, a socket, a power connection piece, a metal card, an alarm, an inlay groove, and a cavity tube. The buoyancy plate is pulled downward by the contraction of a spring, so that the socket is separated from the metal card, and the power connection piece connected to the socket is moved between the metal cards, so that the metal card is in contact with the power connection piece. At this time, the alarm is in a passage state through the metal card and the power connection piece, so that an alarm is sounded through the alarm to prevent the rubber ring from aging and leaking, which may cause equipment failure and environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the overall front three-dimensional structure of this application; Figure 2 This is a schematic diagram of the internal structure of the overall transformer of this application; Figure 3 This is a schematic diagram of the structure of the overall circulation mechanism of this application; Figure 4 This is a schematic diagram of the structure inside the overall air filling end shell of this application; Figure 5 This is a schematic diagram of the overall fin structure of this application; Figure 6 This is a schematic diagram of the structure of the overall liquid circulation mechanism of this application; Figure 7 For this application as a whole Figure 6 A is a schematic diagram of the enlarged structure of the middle part; Figure 8 This is a schematic diagram of the structure of the overall liquid leakage detection mechanism of this application; Fig. 9 For this application as a whole Figure 8 Schematic diagram of the enlarged structure of the transformer.

[0010] In the figure: 1, bracket; 2, bottom box; 3, transformer end shell; 4, circulation mechanism; 41, outer frame tube; 42, connecting cross frame; 43, positioning piece; 44, coil; 45, side bow frame; 46, thin horizontal square tube; 47, air filling end shell; 471, guide block; 472, blast blade; 473, air closing arc plate; 474, air filling impeller; 475, air filling channel; 48, connecting tube fin; 5, fin structure; 51, connecting end; 52, connecting air duct; 53, square ring fin; 6, top plate; 7, liquid circulation mechanism; 71, U arc cavity plate; 72, drum liquid wheel plate; 73, drum liquid Blade; 74, liquid inlet port; 75, liquid outlet port; 76, liquid discharge port; 77, rotating handle; 78, pressure wheel; 79, liquid outlet connecting pipe; 710, liquid inlet connecting pipe; 711, lifting end shell; 712, alloy wire; 713, metal contact piece; 714, wiring conductor; 715, power conductor; 716, power contact piece; 8, liquid leakage detection mechanism; 81, bending plate; 82, buoyancy plate; 83, metal connecting piece; 84, card seat; 85, power connection piece; 86, metal card; 87, alarm; 88, inlay groove; 89, cavity tube; 9, oil pump; 10, liquid extraction tube. DETAILED DESCRIPTION

[0011] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0012] See also Figure 1-Figure 7 The embodiment of the present application is: an oil-immersed power transformer, comprising a bracket 1, a bottom box 2 is fixedly connected to the top of the bracket 1, a transformer end shell 3 is fixedly connected to the top of the bottom box 2, a fin structure 5 is arranged on both the front and rear sides of the transformer end shell 3, a circulation mechanism 4 is arranged inside the transformer end shell 3, a liquid circulation mechanism 7 is arranged below the circulation mechanism 4, a liquid leakage detection mechanism 8 is arranged above the circulation mechanism 4, an oil pump 9 is arranged inside the bottom box 2, and a liquid extraction pipe 10 is connected to the side of the oil pump 9; The circulation mechanism 4 includes an outer frame tube 41, two outer frame tubes 41 are provided, and the two outer frame tubes 41 are respectively fixedly connected to the two sides of the bracket 1, and two connecting cross frames 42 are fixedly connected inside the transformer end shell 3, and the outer side of the connecting cross frame 42 is fixedly connected with a positioning piece 43, and the lower part of the positioning piece 43 is fixedly connected with a coil 44, and the front and rear sides of the connecting cross frame 42 are fixedly connected with four side bow frames 45, and the side of the side bow frame 45 away from the connecting cross frame 42 is fixedly connected with six thin horizontal square tubes 46, and both ends of each thin horizontal square tube 46 are fixedly connected with a connecting tube fin 48, and the middle part of the outer side of the outer frame tube 41 is fixedly connected with an air injection end shell 47; The air filling end shell 47 includes a guide block 471, which is fixedly connected to the middle of the inner wall of the outer frame tube 41, and a blast blade 472 is arranged on the side of the guide block 471. A wind arc closing plate 473 is fixedly connected to the inner wall of the air filling end shell 47, and an air filling impeller 474 is arranged on the inner side of the wind arc closing plate 473. An air filling channel 475 is opened inside the air filling end shell 47. A connecting square hole is provided on the outer wall of the transformer end shell 3, and the connecting square hole is connected to the outer frame tube 41, the connecting square hole is connected to the connecting cross frame 42, the side frame 45 is connected to the connecting cross frame 42, the thin cross square tube 46 is connected to the connecting tube fin 48, the blast blade 472 is rotatably connected to the outer frame tube 41, and the air injection impeller 474 is fixedly connected to the axial center of the blast blade 472, so that the side frame 45 cools the surrounding liquid and improves the cooling effect of the insulating oil inside the transformer end shell 3. At the same time, the connecting cross frame 42 is used to take away the heat generated by the coil 44 on the positioning piece 43 after power is turned on by the internal flowing air. In addition, the connecting tube fin 48 absorbs the heat of the connected thin cross square tube 46 through the flow of external air, and uses the thin cross square tube 46 to contact the side frame 45 to absorb the heat of the side frame 45, so that the temperature of the side frame 45 can be quickly dissipated, the heat dissipation effect of the side frame 45 is promoted, and the heat dissipation efficiency of the insulating oil around the side frame 45 is improved.

[0013] The fin structure 5 includes a connecting end 51, a side of the connecting end 51 away from the transformer end shell 3 is fixedly connected with a plurality of square ring fins 53, and a connecting air duct 52 is fixedly connected inside the plurality of square ring fins 53; The liquid circulation mechanism 7 comprises a U-arc cavity plate 71, the front and rear sides of the inner wall of the U-arc cavity plate 71 are fixedly connected with a drum liquid wheel plate 72, the side of each drum liquid wheel plate 72 is rotatably connected with two drum liquid blades 73, the bottom surface of the drum liquid wheel plate 72 is fixedly connected with a liquid inlet port 74, the top surface of the drum liquid wheel plate 72 is provided with a liquid outlet port 75, the top surface of the U-arc cavity plate 71 is provided with a liquid discharge port 76, the rotating shaft of each drum liquid blade 73 is fixedly connected with a rotating handle 77, the outer side of the drum liquid blade 73 is rotatably connected with two pressure wheels 78, the outer side of the pressure wheel 78 is provided with a liquid outlet connecting pipe 79, one end of the liquid outlet connecting pipe 79 is fixedly connected with a liquid inlet connecting pipe 710, and the other end of the liquid outlet connecting pipe 79 is fixedly connected to one of the side arch frames 45, and the end of the liquid inlet connecting pipe 710 away from the liquid outlet connecting pipe 79 is fixedly connected to the other side arch frame 45; The bottom surface of the connecting cross frame 42 below is fixedly connected with an alloy wire 712, the bottom end of the alloy wire 712 is fixedly connected with a lifting end shell 711, both sides of the bottom surface of the lifting end shell 711 are fixedly connected with metal contacts 713, the side of the oil pump 9 is electrically connected with a power-carrying wire 715, the right inner wall of the bottom box 2 is fixedly connected with a wiring wire 714, the tops of the wiring wire 714 and the power-carrying wire 715 are fixedly connected with power-carrying contacts 716, the liquid outlet connecting pipe 79 is connected with the liquid inlet connecting pipe 710, the liquid inlet connecting pipe 710 is connected with the side bow frame 45, and the connecting air duct 52 will take away the heat of the insulating oil in the square ring fin 53, and at the same time , allowing the insulating oil inside the transformer end shell 3 to flow from bottom to top, preventing the insulating oil from being left stationary to cause heat accumulation and affect the efficiency of the coil 44 in transmitting electrical energy. In addition, the liquid drum blade 73 rotates to drive the connected handle 77 to rotate, so that the handle 77 drives the pressure wheel 78 to squeeze the connection between the liquid outlet pipe 79 and the liquid inlet pipe 710, so that the liquid outlet pipe 79 and the liquid inlet pipe 710 are pressed to promote the flow of liquid in the liquid outlet pipe 79, and draw air into the two side frames 45 connected to the liquid inlet pipe 710 and the liquid outlet pipe 79. The air flow in the side frames 45 is improved through the above-mentioned two places, thereby promoting the flow frequency in the thin horizontal square tube 46 connected to the side frames 45.

[0014] The leakage detection mechanism 8 includes a bending plate 81, four bending plates 81 are provided, and the four bending plates 81 are fixedly connected to the bottom surface of the top plate 6, a buoyancy plate 82 is provided between the four bending plates 81, the top surface of the buoyancy plate 82 is fixedly connected to a metal connecting piece 83, the top surface of the metal connecting piece 83 is fixedly connected to a holder 84, the top of the holder 84 is fixedly connected to a power connection piece 85, metal cards 86 are provided on both sides of the top of the holder 84, and an alarm 87 is fixedly connected to the top of the metal card 86, an inlay groove 88 is provided inside the top plate 6, and a cavity tube 89 is fixedly connected to the edge side of the buoyancy plate 82; A spring is provided at the bottom end of the bending plate 81, and the two ends of the spring are fixedly connected to the bending plate 81 and the top plate 6 respectively. The alarm 87 is located inside the inlay groove 88, and the metal card 86 penetrates from the bottom surface of the top plate 6 to the inside of the inlay groove 88. The spring contracts to pull the buoyancy plate 82 downward, so that the card holder 84 is separated from the metal card 86, and the power connection piece 85 connected to the card holder 84 is moved between the metal cards 86, so that the metal card 86 is in contact with the power connection piece 85. At this time, the alarm 87 is in a passage state through the metal card 86 and the power connection piece 85, so that an alarm is sounded through the alarm 87 to prevent the rubber ring from aging and leaking, causing equipment failure and environmental pollution.

[0015] Working principle: When the outside air flows through the connecting tube fins 48, the air will enter the air filling end shell 47, the flowing air passes through the air filling impeller 474, and flows into the air filling channel 475 from the outer wall of the air filling impeller 474, so that the air in the air filling channel 475 is discharged. In this process, the air flows through the air filling impeller 474 to make it rotate, and the rotation of the air filling impeller 474 drives the connected blast blades 472 to rotate in contact with the guide block 471. The rotation of the blast blades 472 transports the compressed gas in the outer frame tube 41 downward, so that the air in the outer frame tube 41 flows into the connecting cross frame 42, and then the air flows into another outer frame tube 41 through the connecting cross frame 42. The air flows upward through the outer frame tube 41 and enters the connecting cross frame located above. The air in the frame 42 is circulated, and when the air passes through the tube-connected fins 48, the tube-connected fins 48 will cool the air in the outer frame tube 41, and at the same time, the air in the connected cross frame 42 enters the side arch frame 45, so that the side arch frame 45 cools the surrounding liquid, thereby improving the cooling effect of the insulating oil in the transformer end shell 3, and at the same time, the connected cross frame 42 is used to take away the heat generated by the coil 44 on the positioning piece 43 after the power is turned on by the internal flowing air. In addition, the tube-connected fins 48 will absorb the heat of the connected thin horizontal square tubes 46 through the flow of external air, and use the thin horizontal square tubes 46 to contact the side arch frame 45 to absorb the heat of the side arch frame 45, so that the temperature of the side arch frame 45 can be quickly dissipated, thereby promoting the heat dissipation effect of the side arch frame 45 and improving the heat dissipation efficiency of the insulating oil around the side arch frame 45; When the temperature of the insulating oil inside the transformer end shell 3 rises, the alloy wire 712 in contact with the insulating oil is made of nickel-titanium alloy and will shrink after absorbing the heat of the insulating oil. The shrunk alloy wire 712 will pull the lifting end shell 711 upward, so that the metal contact piece 713 connected to the lifting end shell 711 moves upward, so that the metal contact piece 713 moves upward and contacts the power contact piece 716. At this time, the energized wiring conductor 714 contacts the metal contact piece 713 through the power contact piece 716 connected to the top, so that the metal contact piece 713 moves upward through the lifting end shell 711. The end shell 711 energizes the energized contact piece 716 connected to the energized wire 715, and the energized energized contact piece 716 guides the current to the oil pump 9, so that the oil pump 9 is in a working state after being energized. When the oil pump 9 starts to work, the oil pump 9 draws the insulating oil of the transformer end shell 3 into the U-arc cavity plate 71 through the liquid suction pipe 10, so that the insulating oil in the U-arc cavity plate 71 flows upward, and the insulating oil in the U-arc cavity plate 71 enters the drum liquid wheel plate 72 through the liquid inlet port 74, and the flowing insulating oil enters the drum liquid wheel plate 72 to drive the drum liquid blade 73 The insulating oil in the drum liquid wheel plate 72 is then discharged to the top of the transformer end shell 3 through the liquid outlet port 75 and the liquid discharge port 76. During this process, the insulating oil on the side of the U-arc cavity plate 71 enters the connecting end 51 through the side of the U-arc cavity plate 71, and enters the square ring fin 53 connected to the connecting end 51. When air passes through the connecting air duct 52, the connecting air duct 52 will take away the heat of the insulating oil in the square ring fin 53. At the same time, the insulating oil inside the transformer end shell 3 flows from bottom to top to prevent the insulating oil from being left standing and causing heat accumulation. The ringing coil 44 transmits electric energy efficiently. In addition, the rotation of the drum liquid blade 73 drives the connected rotating handle 77 to rotate, so that the rotating handle 77 drives the pressing wheel 78 to squeeze the connecting part of the liquid outlet connecting pipe 79 and the liquid inlet connecting pipe 710, so that the liquid outlet connecting pipe 79 and the liquid inlet connecting pipe 710 are pressed to promote the flow of liquid in the liquid outlet connecting pipe 79, and draw air from the two side bow frames 45 connected to the liquid inlet connecting pipe 710 and the liquid outlet connecting pipe 79. The air flow in the above two side bow frames 45 is improved, thereby promoting the flow frequency in the thin horizontal square tube 46 connected to the side bow frames 45; When the insulating oil level inside the transformer end shell 3 is normal, the buoyancy of the insulating oil surface pushes the buoyancy plate 82 and the cavity tube 89 upward to apply force, so that the spring on the bending plate 81 below the buoyancy plate 82 is in a stretched state. At this time, the metal connecting piece 83 on the buoyancy plate 82 is in a clamping state with the metal card 86 through the clamping seat 84. At this time, the buoyancy plate 82 is stationary. When the transformer end shell 3 leaks and decreases, the buoyancy plate 82 and the bottom of the cavity tube 89 are no longer supported by the buoyancy of the insulating oil. The spring in the stretched state on the bending plate 81 begins to shrink. The buoyancy plate 82 is pulled downward by the spring contraction, so that the clamping seat 84 is separated from the metal card 86, and the power connection piece 85 connected to the clamping seat 84 is moved between the metal cards 86, so that the metal card 86 is in contact with the power connection piece 85. At this time, the alarm 87 is in a passage state through the metal card 86 and the power connection piece 85, so that an alarm is sounded through the alarm 87 to prevent the rubber ring from aging and leaking, resulting in equipment failure and environmental pollution.

[0016] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solution and inventive concept of the present application, which should be covered by the protection scope of the present application.

Claims

1. An oil-immersed power transformer, comprising a bracket (1), characterized in that: The top of the bracket (1) is fixedly connected to a bottom box (2), the top of the bottom box (2) is fixedly connected to a transformer end shell (3), the front and rear sides of the transformer end shell (3) are both provided with fin structures (5), a circulation mechanism (4) is provided inside the transformer end shell (3), a liquid circulation mechanism (7) is provided below the circulation mechanism (4), a liquid leakage detection mechanism (8) is provided above the circulation mechanism (4), an oil pump (9) is provided inside the bottom box (2), and a liquid extraction pipe (10) is connected to the side of the oil pump (9).

2. The oil-immersed power transformer according to claim 1, characterized in that: The circulation mechanism (4) comprises an outer frame tube (41), two outer frame tubes (41) are provided, and the two outer frame tubes (41) are respectively fixedly connected to the two sides of the bracket (1); two connecting cross frames (42) are fixedly connected inside the transformer end shell (3); the outer side of the connecting cross frame (42) is fixedly connected to a positioning plate (43); the lower side of the positioning plate (43) is fixedly connected to a coil (44); the front and rear sides of the connecting cross frame (42) are both fixedly connected to four side arch frames (45); the side of the side arch frame (45) away from the connecting cross frame (42) is fixedly connected to six thin horizontal square tubes (46); both ends of each thin horizontal square tube (46) are fixedly connected to a connecting tube fin (48); and the middle part of the outer side of the outer frame tube (41) is fixedly connected to an air injection end shell (47).

3. An oil-immersed power transformer according to claim 2, characterized in that: The air filling end shell (47) comprises a guide block (471), the guide block (471) is fixedly connected to the middle part of the inner wall of the outer frame tube (41), a blast blade (472) is arranged on the side of the guide block (471), a wind arc closing plate (473) is fixedly connected to the inner wall of the air filling end shell (47), an air filling impeller (474) is arranged on the inner side of the wind arc closing plate (473), and an air filling channel (475) is opened inside the air filling end shell (47).

4. An oil-immersed power transformer according to claim 3, characterized in that: The outer wall of the transformer end shell (3) is provided with a connecting square hole, and the connecting square hole is connected to the outer frame tube (41), the connecting square hole is connected to the connecting cross frame (42), the side arch frame (45) is connected to the connecting cross frame (42), the thin cross square tube (46) is connected to the connecting tube fin (48), the blast blade (472) is rotatably connected to the outer frame tube (41), and the air impeller (474) is fixedly connected to the blast blade (472) by the axis.

5. The oil-immersed power transformer according to claim 4, characterized in that: The fin structure (5) comprises a connecting end (51), a side of the connecting end (51) away from the transformer end shell (3) being fixedly connected to a plurality of square ring fins (53), and a connecting air duct (52) being fixedly connected to the inner sides of the plurality of square ring fins (53).

6. The oil-immersed power transformer according to claim 5, characterized in that: The liquid circulation mechanism (7) comprises a U-arc cavity plate (71), the inner wall of which is fixedly connected to a liquid drum wheel plate (72) on both the front and rear sides, each of which is rotatably connected to two liquid drum blades (73) on the side surface, a liquid inlet port (74) fixedly connected to the bottom surface of the liquid drum wheel plate (72), a liquid outlet port (75) provided on the top surface of the liquid drum wheel plate (72), a liquid discharge port (76) provided on the top surface of the U-arc cavity plate (71), and each of which is rotatably connected to the side surface of the liquid drum wheel plate (72). A rotating handle (77) is fixedly connected to the rotating shaft of (73); the outer side of the liquid-drum blade (73) is rotatably connected to two pressure wheels (78); a liquid outlet connecting pipe (79) is arranged on the outer side of the pressure wheel (78); one end of the liquid outlet connecting pipe (79) is fixedly connected to a liquid inlet connecting pipe (710), and the other end of the liquid outlet connecting pipe (79) is fixedly connected to one of the side bow frames (45); and one end of the liquid inlet connecting pipe (710) away from the liquid outlet connecting pipe (79) is fixedly connected to the other side bow frame (45).

7. The oil-immersed power transformer according to claim 6, characterized in that: The bottom surface of the connecting cross frame (42) located below is fixedly connected to an alloy wire (712), the bottom end of the alloy wire (712) is fixedly connected to a lifting end shell (711), both sides of the bottom surface of the lifting end shell (711) are fixedly connected to metal contacts (713), the side of the oil pump (9) is electrically connected to a power-carrying wire (715), the right inner wall of the bottom box (2) is fixedly connected to a wiring wire (714), the top ends of the wiring wire (714) and the power-carrying wire (715) are fixedly connected to power-carrying contacts (716), the liquid outlet connecting pipe (79) is connected to the liquid inlet connecting pipe (710), and the liquid inlet connecting pipe (710) is connected to the side bow frame (45).

8. The oil-immersed power transformer according to claim 7, characterized in that: The liquid leakage detection mechanism (8) comprises a bending plate (81), wherein four bending plates (81) are provided, and the four bending plates (81) are fixedly connected to the bottom surface of the top plate (6), a buoyancy plate (82) is provided between the four bending plates (81), the top surface of the buoyancy plate (82) is fixedly connected to a metal connecting piece (83), the top surface of the metal connecting piece (83) is fixedly connected to a holder (84), the top end of the holder (84) is fixedly connected to a power connection piece (85), metal cards (86) are provided on both sides of the top end of the holder (84), the top end of the metal card (86) is fixedly connected to an alarm (87), an inlay groove (88) is provided inside the top plate (6), and a cavity tube (89) is fixedly connected to the edge side of the buoyancy plate (82).

9. The oil-immersed power transformer according to claim 8, characterized in that: A spring is provided at the bottom end of the bending plate (81), and both ends of the spring are fixedly connected to the bending plate (81) and the top plate (6) respectively. The alarm (87) is located inside the inlay groove (88), and the metal card (86) passes through the bottom surface of the top plate (6) to the inside of the inlay groove (88).

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