Oil-immersed power transformer with anti-short circuit function

Abstract

The present application relates to oil-immersed power transformer technical field, especially to a kind of oil-immersed power transformer with anti short-circuit function, including the equipment main body of oil-immersed power transformer, the equipment main body includes shell and the regular hexagonal prism framework being set in shell interior, still include the coil being wound on regular hexagonal prism framework, regular hexagonal prism framework is provided with heat dissipation part, the top of shell is provided with the oil storage part of filling insulating oil, the outside of oil storage part is equipped with the conveying part of connecting shell inner cavity transmission insulating oil, the surface of regular hexagonal prism framework is provided with several through holes, wherein heat dissipation part includes regular hexagonal prism retaining groove being opened in the top of regular hexagonal prism framework;The present application has can pass through the flowability of enhancing the insulating oil in shell interior, realizes the effect of cooling inside shell, to reach the function of anti short-circuit.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil-immersed power transformers, and particularly relates to an oil-immersed power transformer with short-circuit resistance. BACKGROUND

[0002] The oil-immersed power transformer is a core device for realizing power transmission and voltage conversion in a power grid, is widely applied to power generation, power transmission and power distribution, and is composed of a core, a winding and insulating oil. The core forms a magnetic circuit, the winding carries current, and the insulating oil (transformer oil) is a key component, which has two functions of insulation and heat dissipation. The insulating oil can effectively insulate high-voltage components and carry away heat generated by the winding and the core through circulating flow, so as to ensure stable operation of the transformer. Due to excellent cooling performance of the insulating oil, the oil-immersed transformer has significant advantages of large capacity, strong overload capacity, high cost-effectiveness and long service life compared with the dry-type transformer, and therefore, is particularly suitable for high-voltage, super-high-voltage and large-capacity power occasions, and is an indispensable basic device in modern power systems.

[0003] The oil-immersed power transformer with high-efficiency heat dissipation disclosed in the publication No. CN117877863B comprises a box body and an oil pillow. The winding is arranged in the box body. The box body is provided with a partition plate. The partition plate divides the box body into an upper cavity and a lower cavity. The oil pillow is in communication with the upper cavity. The outer periphery of the box body is provided with a plurality of heat dissipation mechanisms. The heat dissipation mechanism comprises fixed fins and movable fins. The movable fins are arranged in the fixed fins in an extendable and retractable manner. An oil storage cavity is formed between the fixed fins and the movable fins. The oil storage cavity is in communication with the lower cavity. The heat dissipation mechanism further comprises a driving assembly for driving the movable fins to extend and retract in the fixed fins. The present application forms a set of heat dissipation systems between the upper cavity and the oil pillow, and forms another set of heat dissipation systems between the lower cavity and the heat dissipation mechanism. The two sets of heat dissipation systems alternately circulate to cool and dissipate heat of the winding, so that the heat dissipation performance of the power transformer can be greatly improved.

[0004] The existing oil-immersed power transformer lacks effective flowability of the insulating oil, so that the heat dissipation capacity of the insulating oil itself cannot be effectively enhanced. When the temperature in the oil-immersed power transformer is too high, the oil-immersed power transformer is prone to short circuit due to high temperature.

[0005] Therefore, the oil-immersed power transformer with short-circuit resistance is designed to solve the above problems. SUMMARY

[0006] The present application relates to the technical field of oil-immersed power transformers, and particularly relates to an oil-immersed power transformer with short-circuit resistance.

[0007] To achieve the above object, the technical scheme adopted by the present application is as follows: An oil-immersed power transformer with anti-short circuit function, comprising an equipment main body of the oil-immersed power transformer, the equipment main body comprising a shell and a regular hexagonal prism framework arranged inside the shell, further comprising a coil wound on the regular hexagonal prism framework, the regular hexagonal prism framework being provided with a heat dissipation part, the top of the shell being provided with an oil storage part filled with insulating oil, and the outside of the oil storage part being provided with a conveying part connected with the inner cavity of the shell to transmit the insulating oil.

[0008] The regular hexagonal prism framework is provided with a plurality of through holes on the surface.

[0009] The heat dissipation part comprises a regular hexagonal prism retaining groove arranged on the top of the regular hexagonal prism framework, a plurality of regular hexagonal prism reinforcing plates are fixedly arranged in the inner cavity of the regular hexagonal prism retaining groove, a driving motor is inlaidly arranged at the bottom of the inner cavity of the regular hexagonal prism retaining groove, a lead screw is drivingly connected to the output end of the driving motor, the lead screw penetrates through all the regular hexagonal prism reinforcing plates inside the regular hexagonal prism retaining groove, and a plurality of groups of regular hexagonal prism extrusion plates are arranged on the surface of the lead screw, wherein the outer wall surface of the regular hexagonal prism extrusion plate is attached to the inner wall surface of the regular hexagonal prism retaining groove.

[0010] Preferably, a plurality of support plates are arranged at the corners of the regular hexagonal prism framework, a plurality of groups of insulating oil injection holes are arranged on the surface of the support plates, the inner cavity of the support plate is in communication with the inner cavity of the regular hexagonal prism framework, a stirring part is arranged at one end of the support plate, a positioning hole is arranged on the surface of the support plate, a reinforcing rod is insertedly arranged on the support plate through the positioning hole, and an adjusting part is arranged on the outer part of the reinforcing rod.

[0011] Preferably, the stirring part comprises a movable groove arranged at one end of the support plate, a transmission rod is movably arranged in the inner cavity of the movable groove, a fan wheel is arranged at one end of the transmission rod, and a driving plate is fixedly arranged on the surface of the fan wheel.

[0012] Preferably, the adjusting part comprises a guide plate fixedly arranged at the bottom of the inner cavity of the shell, a first sliding groove is arranged on the surface of the guide plate, a second sliding groove is arranged on the surface of the support plate and penetrates through the positioning hole, a plurality of groups of directional grooves are arranged on the outer wall of the reinforcing rod, a scale line is arranged on the surface of the second sliding groove, and a locking piece is arranged at the connection part of the reinforcing rod and the support plate.

[0013] Preferably, the locking piece comprises a threaded retaining hole arranged at one end of the reinforcing rod, a tension bolt is threadedly connected to one end of the threaded retaining hole, a clamping frame is movably arranged at one end of the tension bolt, a protective layer is fixedly arranged on the inner wall of the clamping frame, and the inner wall of the clamping frame is attached to the surface of the support plate through the protective layer.

[0014] Preferably, the bottom of the shell is provided with a circulating part of insulating oil, and the circulating part is provided with a spraying part of insulating oil.

[0015] Preferably, the circulating part comprises a hydraulic pipe fixed to the bottom of the shell, one end of the hydraulic pipe is provided with a plurality of groups of circulating pipes, one end of the circulating pipes is in communication with the inner cavity of the shell, the bottom of the regular hexagonal framework is provided with a hydraulic hole, and the inner cavity of the hydraulic hole is fixedly installed with a pressure discharge pipe connected with the hydraulic pipe, and the one end of the circulating pipe connected with the shell is installed outside the spraying part.

[0016] Preferably, the spraying part comprises an output pipe of insulating oil installed at one end of the circulating pipe, the outside of the output pipe is threadedly connected with a sealing ring, one end of the output pipe is fixedly installed with a spray head, one end of the output pipe is movably installed with a buoyancy plate, the inside of the buoyancy plate is hollow, the surface of the buoyancy plate is provided with a plurality of groups of flow guide grooves, the spray head is provided with a sound monitoring module, and the outside of the sound monitoring module is provided with an isolation layer.

[0017] Compared with the prior art, the present application has the following beneficial effects:

[0018] By the provision of the regular hexagonal framework, six planes can provide uniform distribution and strong radial support surface for the inside of the coil, when a huge radial short-circuit electric force (inward compression or outward expansion) is generated, the force will be uniformly transmitted to the six corners and six edges of the regular hexagonal framework through the six planes, and the edges and corner columns of the regular hexagonal framework can efficiently share the force, so that the instability and plastic deformation that may occur in a single direction of the circular structure are avoided.

[0019] The present application can realize the effective flow of the insulating oil inside the shell through the heat dissipation part, enhance the heat dissipation effect of the insulating oil on the coil, and the sprayed insulating oil can be directly sprayed on the inner wall of the coil, so that the insulating oil can better contact the surface of the coil, the heat dissipation capacity of the outside of the coil is enhanced, and the oil-immersed power transformer short-circuit can be effectively avoided due to the temperature being too high.

[0020] The present application can improve the spraying effect of the insulating oil through the provision of the adjusting part, further improve the flowability of the insulating oil inside the shell, and again enhance the heat dissipation effect of the inside of the coil, and the oil-immersed power transformer short-circuit resistance is also enhanced.

[0021] The present application can enhance the flow range of the insulating oil inside the shell through the provision of the stirring part, so that the heat dissipation of the insulating oil can be more effectively realized, the flow state of the insulating oil can again enhance the cooling effect of the coil, and the oil-immersed power transformer short-circuit resistance is again enhanced.

[0022] The present application is through the setting of locking piece, rotating the tight bolt connecting thread fixed hole, thereby synchronously driving the clamping frame to extrude and fix on the supporting plate with the protective layer, and then realizing the position fixation of the reinforcing rod, and the clamping frame can also move according to the position of the scale line, and then the thickness of the coil winding is accurately controlled, and the uniformity of the coil winding thickness on the regular hexagonal prism framework is ensured.

[0023] The present application is through the setting of circulating part, using the underground low temperature to cool the insulating oil in the circulating pipe, at this time, the heat dissipation capacity of the insulating oil is improved, so that when the cooled insulating oil enters the shell again, the temperature of the insulating oil in the shell is reduced, and the heat dissipation capacity of the insulating oil in the shell is enhanced again.

[0024] The present application is through the setting of the spraying part, the circulating pipe can conduct the insulating oil to the output pipe, then the output pipe conducts the insulating oil to the spray head, and finally the spray head sprays the cooled insulating oil in the shell, the sprayed insulating oil contacts with the air in the shell, and then the air is cooled, the temperature in the shell is reduced, and the short-circuit resistance of the oil-immersed power transformer is enhanced again. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the overall structure schematic diagram of the oil-immersed power transformer with short-circuit resistance function of the present application;

[0026] Figure 2 It is the front cross-sectional structure schematic diagram of the oil-immersed power transformer with short-circuit resistance function of the present application;

[0027] Figure 3 It is the back cross-sectional structure schematic diagram of the oil-immersed power transformer with short-circuit resistance function of the present application;

[0028] Figure 4 It is the reinforcing rod assembly structure schematic diagram of the oil-immersed power transformer with short-circuit resistance function of the present application;

[0029] Figure 5 It is the supporting plate cross-sectional structure schematic diagram of the oil-immersed power transformer with short-circuit resistance function of the present application;

[0030] Figure 6 It is the reinforcing rod structure schematic diagram of the oil-immersed power transformer with short-circuit resistance function of the present application;

[0031] Figure 7 It is the regular hexagonal prism framework cross-sectional structure schematic diagram of the oil-immersed power transformer with short-circuit resistance function of the present application.

[0032] In the figure: 1, the device main body; 101, the shell; 102, the regular hexagonal framework; 103, the coil; 104, the oil storage part; 105, the conveying part; 2, the through hole; 3, the regular hexagonal retaining groove; 4, the regular hexagonal reinforcing plate; 5, the driving motor; 6, the screw rod; 7, the regular hexagonal extrusion plate; 8, the support plate; 9, the injection hole; 10, the positioning hole; 11, the reinforcing rod; 12, the movable slot; 13, the transmission rod; 14, the fan wheel; 15, the guide plate; 16, the first sliding groove; 17, the second sliding groove; 18, the directional slot; 19, the scale line; 20, the threaded retaining hole; 21, the elastic bolt; 22, the clamping frame; 23, the protective layer; 24, the driving plate; 25, the hydraulic pipe; 26, the circulating pipe; 27, the hydraulic hole; 28, the pressure discharge pipe; 29, the output pipe; 30, the spray head; 31, the buoyancy plate; 32, the flow guide groove; 33, the sound monitoring module; 34, the sealing ring; 35, the isolation layer. DETAILED DESCRIPTION

[0033] The following description is provided to enable those skilled in the art to carry out the invention. The preferred embodiments in the following description are only examples and other obvious modifications can be made by those skilled in the art.

[0034] As Figures 1-7 shown in the figure, an oil-immersed power transformer with anti-short circuit function includes a device main body 1 of the oil-immersed power transformer, the device main body 1 includes a shell 101 and a regular hexagonal framework 102 arranged inside the shell 101, and further includes a coil 103 wound on the regular hexagonal framework 102. Compared with the traditional cylindrical framework, the six planes of the regular hexagonal framework 102 provide uniform and strong radial support surfaces for the inside of the coil 103. When a huge radial short-circuit electric force (inward compression or outward expansion) is generated, the force is uniformly transmitted to the six corners and six edges of the regular hexagonal framework 102 through the six planes of the regular hexagonal framework 102, which is efficiently shared by the edge lines and corner columns of the regular hexagonal framework 102, thereby avoiding the instability and plastic deformation that may occur in a single direction of the circular structure. A heat dissipation part is arranged on the regular hexagonal framework 102, which is used to improve the heat dissipation capacity of the regular hexagonal framework 102. The top of the shell 101 is provided with an oil storage part 104 for filling insulating oil, which is used for subsequent supplementing work. The outside of the oil storage part 104 is provided with a conveying part 105 connected to the inner cavity of the shell 101 for transmitting insulating oil, and the conveying part 105 is used to input the insulating oil in the oil storage part 104 into the inside of the shell 101;

[0035] A plurality of through holes 2 are formed on the surface of the regular hexagonal framework 102. The through holes 2 can effectively improve the heat dissipation effect inside the regular hexagonal framework 102 and realize the movement of the insulating oil inside and outside the regular hexagonal framework 102. The insulating oil can enter the inner cavity of the regular hexagonal framework 102 through the through holes 2.

[0036] The heat dissipation part comprises a regular hexagonal retaining groove 3 opened on the top of the regular hexagonal framework 102. The regular hexagonal retaining groove 3 allows the insulating oil inside the shell 101 to be immersed therein, so that the insulating oil can effectively dissipate heat inside the regular hexagonal framework 102. A plurality of regular hexagonal reinforcing plates 4 are fixedly installed in the inner cavity of the regular hexagonal retaining groove 3. The regular hexagonal reinforcing plates 4 improve the strength of the interior of the regular hexagonal framework 102, avoiding deformation of the regular hexagonal framework 102 after being subjected to extrusion force. A driving motor 5 is inlaidly installed at the bottom of the inner cavity of the regular hexagonal retaining groove 3. The driving motor 5 is an asynchronous motor and can be driven in forward and reverse directions. A lead screw 6 is drivingly connected to the output end of the driving motor 5, and the lead screw 6 penetrates through all the regular hexagonal reinforcing plates 4 inside the regular hexagonal retaining groove 3. A plurality of groups of regular hexagonal extrusion plates 7 are installed on the surface of the lead screw 6, wherein the outer wall surface of the regular hexagonal extrusion plate 7 is in close contact with the inner wall surface of the regular hexagonal retaining groove 3.

[0037] In order to effectively avoid short circuit of the oil-immersed power transformer, after the shell 101 is filled with insulating oil covering the coil 103 on the regular hexagonal framework 102, the driving motor 5 can be started. At this time, the driving motor 5 drives the lead screw 6 to rotate clockwise. The rotating lead screw 6 drives the regular hexagonal extrusion plate 7 to move downward in cooperation with the regular hexagonal retaining groove 3. At this time, the regular hexagonal extrusion plate 7 moves toward the corresponding regular hexagonal reinforcing plate 4. Since there is insulating oil inside the regular hexagonal retaining groove 3 on the regular hexagonal framework 102, the regular hexagonal extrusion plate 7 extrudes the insulating oil inside the regular hexagonal retaining groove 3. At this time, the insulating oil is sprayed outside the regular hexagonal framework 102 through a plurality of through holes 2, thereby driving the flowability of the insulating oil inside the shell 101. The heat dissipation property of the insulating oil itself is enhanced, thereby enhancing the heat dissipation effect of the insulating oil on the coil 103. The sprayed insulating oil is also directly sprayed on the inner wall of the coil 103, so that the insulating oil can better contact the surface of the coil 103. At this time, the heat dissipation capacity of the outside of the coil 103 is enhanced, so that the oil-immersed power transformer can be effectively prevented from short circuit due to excessively high temperature of the coil 103.

[0038] A plurality of support plates 8 are arranged at the corners of the regular hexagonal framework 102. The support plates 8 can provide support force for the coil 103 wound on the regular hexagonal framework 102, further improving the stability of the coil 103 wound on the regular hexagonal framework 102. A plurality of groups of insulating oil injection holes 9 are opened on the surface of the support plate 8, and the inner cavity of the support plate 8 is in communication with the inner cavity of the regular hexagonal framework 102. One end of the support plate 8 is provided with a stirring part. A plurality of positioning holes 10 are opened on the surface of the support plate 8. A reinforcing rod 11 is insertedly installed through the positioning holes 10 on the support plate 8. An adjusting part is arranged outside the reinforcing rod 11.

[0039] Several support plates 8 are fixed at the corners of the regular hexagonal frame 102 to provide support for the coils 103 wound on the regular hexagonal frame 102, the support strength of the coils 103 is improved, when the regular hexagonal extrusion plate 7 extrudes the insulating oil inside the regular hexagonal retaining groove 3, the insulating oil will also be conducted to the inside of the support plate 8, and the insulating oil is sprayed through the spray hole 9 on the support plate 8, at this time the sprayed insulating oil flows to both sides of the support plate 8, further improving the flowability of the insulating oil inside the shell 101, and the heat dissipation effect inside the coil 103 is enhanced again, and the short-circuit resistance of the oil-immersed power transformer is also enhanced.

[0040] The stirring part includes a movable groove 12 opened at one end of the support plate 8, a transmission rod 13 movably installed in the inner cavity of the movable groove 12, a fan wheel 14 installed at one end of the transmission rod 13, and a driving plate 24 fixedly installed on the surface of the fan wheel 14, wherein several spray holes 9 are opposite to the inclined surface of the driving plate 24;

[0041] When the spray hole 9 sprays the insulating oil outward, several spray holes 9 will spray the insulating oil on the driving plate 24, so that the driving plate 24 subjected to extrusion will drive the fan wheel 14 at one end of the transmission rod 13 inside the movable groove 12 of the support plate 8 to rotate, so that the rotating fan wheel 14 will stir the insulating oil again, at this time the flow range of the insulating oil inside the shell 101 is enhanced, so that the heat dissipation of the insulating oil can be more effectively realized, and the flow state of the insulating oil can enhance the cooling effect of the coil 103 again, and the short-circuit resistance of the oil-immersed power transformer is enhanced again.

[0042] The adjusting part includes a guide plate 15 fixedly installed at the bottom of the inner cavity of the shell 101, a first sliding groove 16 opened on the surface of the guide plate 15, a second sliding groove 17 opened on the surface of the support plate 8 and penetrating the positioning hole 10, a plurality of directional grooves 18 opened on the outer wall of the reinforcing rod 11, the reinforcing rod 11 can move in the second sliding groove 17 through the directional grooves 18, a scale line 19 opened on the surface of the second sliding groove 17, and a locking piece arranged at the connection between the reinforcing rod 11 and the support plate 8;

[0043] The locking piece includes a threaded positioning hole 20 opened at one end of the reinforcing rod 11, a tension bolt 21 threadedly connected at one end of the threaded positioning hole 20, a clamping frame 22 movably installed at one end of the tension bolt 21, a protective layer 23 fixedly installed on the inner wall of the clamping frame 22, the protective layer 23 is made of high-temperature-resistant and insulating rubber material, and the inner wall of the clamping frame 22 is attached to the surface of the support plate 8 through the protective layer 23;

[0044] According to the thickness of the coil 103 wound on the regular hexagonal prism framework 102, the movable reinforcing rod 11 can be moved by the position limitation of the first sliding groove 16 on the guide plate 15 and the second sliding groove 17 on the support plate 8, at this time the reinforcing rod 11 can be attached to the outside of the coil 103, thereby limiting the position of the coil 103, and after the position movement of the reinforcing rod 11 is completed, the position of the reinforcing rod 11 can be fixed by rotating the tension bolt 21 connected to the threaded fixing hole 20, thereby synchronously driving the clamping frame 22 to cooperate with the protective layer 23 to be extruded and fixed on the support plate 8, thereby realizing the position fixation of the reinforcing rod 11, and the clamping frame 22 can also move according to the position of the scale line 19, thereby accurately controlling the thickness of the coil 103 wound, and ensuring the uniformity of the thickness of the coil 103 wound on the regular hexagonal prism framework 102.

[0045] The bottom of the shell 101 is provided with a circulating part of insulating oil, and the circulating part is provided with a spraying part of insulating oil;

[0046] The circulating part includes a hydraulic pipe 25 fixed at the bottom of the shell 101, one end of the hydraulic pipe 25 is provided with a plurality of groups of circulating pipes 26, the circulating pipes 26 are inserted into the ground, and the low temperature of the ground can be used to realize the cooling work of the circulating pipes 26, and the insertion of the circulating pipes 26 into the ground can also enhance the installation stability of the oil-immersed power transformer, and one end of the circulating pipe 26 is in communication with the inner cavity of the shell 101, the bottom of the regular hexagonal prism framework 102 is provided with a hydraulic hole 27, and the inner cavity of the hydraulic hole 27 is fixedly installed with a pressure discharge pipe 28 connected with the hydraulic pipe 25, and one end of the circulating pipe 26 connected with the shell 101 is installed outside the spraying part;

[0047] When the regular hexagonal prism extrusion plate 7 extrudes the insulating oil, the insulating oil in the regular hexagonal prism retaining groove 3 of the regular hexagonal prism framework 102 can be conducted to the pressure discharge pipe 28 through the hydraulic hole 27, the pressure discharge pipe 28 can conduct the lubricating oil to the hydraulic pipe 25, and the hydraulic pipe 25 can conduct the insulating oil to the inside of the circulating pipe 26 inserted into the ground, so that the low temperature of the ground can be used to cool the insulating oil in the circulating pipe 26, thereby improving the heat dissipation capacity of the insulating oil, and when the cooled insulating oil enters the inside of the shell 101 again, the temperature of the insulating oil in the inside of the shell 101 can be lowered, thereby enhancing the heat dissipation capacity of the insulating oil in the inside of the shell 101.

[0048] The spraying part includes an output pipe 29 of insulating oil installed at one end of the circulating pipe 26, the outside of the output pipe 29 is threadedly connected with a sealing ring 34, one end of the output pipe 29 is fixedly installed with a spray head 30, one end of the output pipe 29 is movably installed with a buoyancy plate 31, the inside of the buoyancy plate 31 is hollow, a plurality of groups of flow guide grooves 32 are formed in the surface of the buoyancy plate 31, a sound monitoring module 33 is arranged on the spray head 30, the outside of the sound monitoring module 33 is provided with an isolation layer 35, the isolation layer 35 is made of transparent material resistant to high temperature, and is mainly used for protecting the sound monitoring module 33.

[0049] When the circulating pipe 26 conducts the cooled insulation oil, the circulating pipe 26 can conduct the insulation oil to the output pipe 29, then the output pipe 29 conducts the insulation oil to the spray head 30, finally the spray head 30 sprays the cooled insulation oil in the shell 101, the sprayed insulation oil contacts with the air in the shell 101, thereby absorbing heat of the air to reduce the temperature in the shell 101, the short circuit resistance of the oil-immersed power transformer is enhanced again, and when the spray head 30 sprays the insulation oil, the insulation oil drops on the buoy plate 31, the buoy plate 31 generates the sound when the lubricating oil is guided through the guide groove 32, at this time, the sound monitoring module 33 monitors the impact sound, thereby determining the position of the buoy plate 31 according to the size of the impact sound, so that the position of the buoy plate 31 can be determined according to the sound size, at this time, the position of the insulation oil in the shell 101 can be obtained, so that the insulation oil can be supplemented according to the actual needs, and the influence of the oil-immersed power transformer caused by the insufficient insulation oil can be avoided.

[0050] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above-mentioned embodiments, the above-mentioned embodiments and descriptions in the specification are only the principles of the present application, various changes and improvements can be made without departing from the spirit of the present application, and these changes and improvements fall within the scope of the present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. An oil-immersed power transformer with short-circuit protection function, characterized in that, The equipment body (1) includes an oil-immersed power transformer. The equipment body (1) includes a shell (101) and a regular hexagonal prism skeleton (102) disposed inside the shell (101). It also includes a coil (103) wound on the regular hexagonal prism skeleton (102). A heat dissipation part is provided on the regular hexagonal prism skeleton (102). An oil storage part (104) filled with insulating oil is provided on the top of the shell (101). A conveying part (105) connected to the inner cavity of the shell (101) and conveying insulating oil is installed outside the oil storage part (104). The surface of the regular hexagonal prism skeleton (102) has several through holes (2); The heat dissipation part includes a regular hexagonal prism retaining groove (3) opened on the top of the regular hexagonal prism skeleton (102). Several regular hexagonal prism reinforcing plates (4) are fixedly installed in the inner cavity of the regular hexagonal prism retaining groove (3). A drive motor (5) is embedded in the bottom of the inner cavity of the regular hexagonal prism retaining groove (3). The output end of the drive motor (5) is connected to a lead screw (6), and the lead screw (6) passes through all the regular hexagonal prism reinforcing plates (4) inside the regular hexagonal prism retaining groove (3). Several sets of regular hexagonal prism extrusion plates (7) are installed on the surface of the lead screw (6), wherein the outer wall surface of the regular hexagonal prism extrusion plate (7) is in contact with the inner wall surface of the regular hexagonal prism retaining groove (3). The hexagonal prism skeleton (102) has several support plates (8) at its corners. The surface of the support plates (8) is provided with several sets of insulating oil injection holes (9). The inner cavity of the support plates (8) is connected to the inner cavity of the hexagonal prism skeleton (102). One end of the support plate (8) is provided with a stirring part. The surface of the support plate (8) is also provided with a positioning hole (10). A reinforcing rod (11) is inserted and installed on the support plate (8) through the positioning hole (10). An adjustment part is provided on the outside of the reinforcing rod (11). The stirring part includes a movable groove (12) opened at one end of the support plate (8), a transmission rod (13) is movably installed in the inner cavity of the movable groove (12), a fan impeller (14) is installed at one end of the transmission rod (13), and a drive plate (24) is fixedly installed on the surface of the fan impeller (14). The adjustment unit includes a guide plate (15) fixed to the bottom of the inner cavity of the housing (101). The surface of the guide plate (15) is provided with a first groove (16). The surface of the support plate (8) is provided with a second groove (17) that passes through the positioning hole (10). Several sets of directional grooves (18) are provided on both sides of the outer wall of the reinforcing rod (11). The surface of the second groove (17) is provided with scale marks (19). A locking element is provided at the connection between the reinforcing rod (11) and the support plate (8).

2. The oil-immersed power transformer with short-circuit protection function according to claim 1, characterized in that: The locking component includes a threaded retaining hole (20) opened at one end of the reinforcing rod (11), a tensioning bolt (21) is threadedly connected to one end of the threaded retaining hole (20), a locking frame (22) is movably installed at one end of the tensioning bolt (21), a protective layer (23) is fixedly installed on the inner wall of the locking frame (22), and the inner wall of the locking frame (22) is in contact with the surface of the support plate (8) through the protective layer (23).

3. An oil-immersed power transformer with short-circuit protection function according to claim 1, characterized in that: The bottom of the housing (101) is provided with an insulating oil circulation section, and the circulation section is provided with an insulating oil spraying section.

4. An oil-immersed power transformer with short-circuit protection function according to claim 3, characterized in that: The circulation section includes a hydraulic pipe (25) fixed to the bottom of the housing (101). One end of the hydraulic pipe (25) is provided with several sets of circulation pipes (26), and one end of the circulation pipe (26) is connected to the inner cavity of the housing (101). The bottom of the regular hexagonal prism skeleton (102) is provided with a hydraulic hole (27). The inner cavity of the hydraulic hole (27) is fixedly installed with a pressure discharge pipe (28) connected to the hydraulic pipe (25). The end of the circulation pipe (26) connected to the housing (101) is installed to the outside of the injection section.

5. An oil-immersed power transformer with short-circuit protection function according to claim 4, characterized in that: The spraying unit includes an insulating oil output pipe (29) installed at one end of the circulation pipe (26). A sealing ring (34) is threaded onto the outside of the output pipe (29). A nozzle (30) is fixedly installed at one end of the output pipe (29). A buoyancy plate (31) is movably installed at one end of the output pipe (29). The interior of the buoyancy plate (31) is hollow. Several sets of guide grooves (32) are opened on the surface of the buoyancy plate (31). A sound monitoring module (33) is provided on the nozzle (30). An isolation layer (35) is provided on the outside of the sound monitoring module (33).

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