CN117238615A - Oil immersed transformer with heat radiation structure - Google Patents

Abstract

The invention discloses an oil-immersed transformer with a heat dissipation structure, which includes: a base plate, a receiving plate on the base plate used to limit the load, a transformer body fitted on the receiving plate, and a shield fixedly connected to the upper surface of the front end of the base plate. plate; it also includes: the bottom plate is symmetrically provided with mounting holes, and the outside of the mounting holes is provided with a limiting groove inside the bottom plate; the left and right sides of the receiving plate are fitted with worm gears; the transformer A plurality of inner heat dissipation fins are fixedly connected to the inner side of the outer end of the body at equal intervals. The oil-immersed transformer with a heat dissipation structure is convenient for installation, fixation and shock absorption of the transformer body. After sensing that the temperature of the transformer body does not rise, it is convenient to suck and refrigerate the oil in the transformer body and then pass it through. This cycle makes it have good heat dissipation effect, facilitates the replacement and maintenance of the refrigeration pipe and the liquid pump, and facilitates the shielding of the liquid pump, so that it has a long service life.

Description

An oil-immersed transformer with a heat dissipation structure

Technical field

The present invention relates to the technical field of oil-immersed transformers, specifically an oil-immersed transformer with a heat dissipation structure.

Background technique

Transformers are important components in the power system. According to the insulation method, they can be divided into dry-type transformers, oil-immersed transformers and gas-filled transformers. Among them, oil-immersed transformers are common and can increase and decrease the voltage for users to use electric energy. Transformers, with the rapid development of economy, more and more transformers are needed.

For example, the Chinese new invention patent with the authorization announcement number CN116487149A discloses an oil-immersed transformer, including: a box, an oil outlet, an oil inlet, a first cooling device, a cooling liquid pipe group, a diverter box, a combiner box, and a third An oil inlet pipe, a first oil outlet pipe, a cooling liquid pipe, a second cooling device, a cooling fin, a splitter plate, a manifold, a second oil inlet pipe, a second oil outlet pipe, a heat sink plate, and an oil pump , oil transfer pipe; the box has a rectangular box-like structure with an overall appearance. The oil outlets are welded and installed on the outer walls of the upper parts of both ends of the box. The oil inlets are welded and installed on the lower parts of both sides of the box. On the outer wall, the first cooling device is fixedly installed on the oil outlet through bolts. By improving the oil-immersed transformer, the present invention has reasonable structural design, high heat dissipation efficiency and good heat dissipation effect, and promotes the flow of transformer oil in the box. , which makes the temperature of the transformer oil more uniform, has the advantages of good thermal conductivity and strong practicability, thereby effectively solving the problems and deficiencies raised by the present invention.

For example, the Chinese utility model patent with the authorization announcement number CN214797002U discloses an oil-immersed transformer, which relates to the field of transformer equipment technology. It includes a body and several heat dissipation blades arranged on the outer side wall of the body. The outer side wall of the body is detachably provided with The protective cover and the cooling blades are all inside the protective cover. This application has the effect of reducing damage to the cooling blades caused by impact during transportation of the transformer.

Existing oil-immersed transformers still have some problems during use, such as;

1. During use, it is generally difficult to install, fix and dampen the transformer body, which can easily affect its service life;

2. During use, heat is generally only dissipated through cooling fins, and the heat dissipation effect is limited; 3. During use, it is inconvenient to replace and repair electrical components, making it difficult to have a long service life.

Therefore, we propose an oil-immersed transformer with a heat dissipation structure to solve the above problems.

Contents of the invention

The purpose of the present invention is to provide an oil-immersed transformer with a heat dissipation structure to solve the problem of existing oil-immersed transformers proposed in the above background technology. During use, it is generally difficult to install, fix and dampen the transformer body. It is easy to affect its service life. Generally, heat is dissipated only through cooling fins, and the heat dissipation effect is limited. It is also inconvenient to replace and repair electrical components, making it difficult to extend its service life.

In order to achieve the above object, the present invention provides the following technical solution: an oil-immersed transformer with a heat dissipation structure, including: a base plate, a receiving plate on the base plate for load-bearing limiting function, a transformer body mounted on the receiving plate and A baffle plate fixedly connected to the upper surface of the front end of the base plate;

Also includes:

The bottom plate is symmetrically provided with mounting holes inside, and the outside of the mounting holes is provided with a limiting groove opened inside the bottom plate;

The left and right sides of the receiving plate are fitted with worm gears, and the lower side of the worm gear is provided with a worm meshingly connected with it;

A plurality of inner heat dissipation fins are fixedly connected to the inner side of the outer end of the transformer body at equal intervals, and the outer sides of the inner heat dissipation fins are fitted with outer heat dissipation fins fixedly connected to the transformer body;

A mounting plate is fixedly connected to the lower side of the upper middle part of the baffle plate, and a controller and a display are embedded in the mounting plate;

A transfer box is located inside the lower end of the baffle, and a refrigeration pipe is nested inside the lower end of the transfer box.

As a preferred technical solution of the present invention, the outer side of the worm gear is provided with a limiting plate that is non-detachably connected to the worm gear, and the limiting plate and the receiving plate are symmetrically fixedly connected, and the inner sides of the left and right ends of the receiving plate are both engaged. An adjusting rod fixed to the worm gear is connected.

By adopting the above technical solution, the outer side of the worm gear is provided with a limiting plate that is non-detachably connected to the worm, and the limiting plate and the receiving plate are symmetrically fixed, and the inner sides of the left and right ends of the receiving plate are connected with each other. The worm gear is fixed on the adjusting rod, so by rotating the worm under the limiting plate, it is convenient for the worm gear to drive the adjusting rod to rotate.

As a preferred technical solution of the present invention, the outer side of the adjustment rod is threadedly connected with a clamping plate that engages with the receiving plate, and the upper end of the clamping plate is higher than the upper surface of the receiving plate, and the clamping plate alone is attached to The outside of the lower end of the transformer body.

By adopting the above technical solution, the outer side of the adjusting rod is threadedly connected with the clamping plate that engages with the receiving plate, and the upper end of the clamping plate is higher than the upper surface of the receiving plate, and the clamping plate alone is attached to the transformer body. The lower end is outside, so it is convenient to rotate the adjusting rod to make the clamping plate fit outside the transformer body and fix the transformer body.

As a preferred technical solution of the present invention, a fixing rod is symmetrically fixed on the lower side of the outer end of the receiving plate, and the lower end of the fixing rod is engaged and non-detachably connected to the inside of the limiting groove, and the receiving plate and the fixing rod respectively have a hollow structure. and "convex" font structure.

By adopting the above technical solution, the fixing rod is symmetrically fixed on the lower side of the outer end of the receiving plate, and the lower end of the fixing rod is engaged and non-detachably connected to the inside of the limiting groove, and the receiving plate and the fixing rod respectively have a hollow structure and a "convex shape". ” font structure, so it is easy to connect the receiving plate and the bottom plate with the internal limit groove through the fixed rod in a non-detachable connection.

As a preferred technical solution of the present invention, a shock-absorbing spring is nested on the outer side of the upper end of the fixed rod, and the upper and lower sides of the shock-absorbing spring are closely connected to the receiving plate and the bottom plate respectively, and the right front end of the receiving plate is inlaid inside. A temperature sensor is installed.

By adopting the above technical solution, a shock-absorbing spring is nested on the outer side of the upper end of the fixed rod, and the upper and lower sides of the shock-absorbing spring are closely connected with the receiving plate and the bottom plate respectively, and the right front end of the receiving plate is inlaid with a temperature sensor. sensor, so it is convenient to make the receiving plate and the bottom plate telescopically connected through the shock-absorbing spring.

As a preferred technical solution of the present invention, the transfer box is nested and fitted on the inside of the front end of the bottom plate, and the outer cross-section of the shielding plate is larger than the outer cross-section of the transfer box, and the transfer box is fitted with a screw fixed thereto. Box lid.

By adopting the above technical solution, since the transfer box is nested and fitted on the inside of the front end of the bottom plate, and the outer cross-section of the shielding plate is larger than the outer cross-section of the transfer box, and the transfer box is fitted with a lid fixed with screws, Therefore, it is convenient to use the shielding plate to shield the limited transfer box nested in the base plate.

As a preferred technical solution of the present invention, a liquid suction pump is fixedly mounted on the upper surface of the tank cover with screws, and the rear end of the liquid suction pump is threadedly connected to a liquid suction pipe connected to the lower end of the transformer body, and the lower side of the tank cover is fixed There is a filter that is nested and fitted into the transfer box.

By adopting the above technical solution, the liquid pump is fixedly installed with screws on the upper surface of the tank cover, and the rear end of the liquid pump is threadedly connected with the liquid suction pipe connected with the lower end of the transformer body, and the lower side of the tank cover is fixedly connected with the The transfer box is nested with a fitted filter, so it is easy to install and disassemble the liquid suction pump, and it is also convenient to suck the oil in the transformer body through the liquid suction pipe, and to filter the oil through the filter.

As a preferred technical solution of the present invention, the left end of the liquid pump is connected with a drain pipe threadedly connected to the box cover, and the liquid pump is connected to the transfer box through the liquid pump and the drain pipe, and the transfer box The inner side of the lower left end is threadedly connected to a liquid pipe connected to the upper end of the transformer body.

By adopting the above technical solution, since the left end of the liquid pump is connected to a drain pipe that is threadedly connected to the tank cover, and the liquid pipe is connected to the transfer box through the liquid pump and the drain pipe, and the inner side of the lower left end of the transfer box The threaded connection is connected to a liquid pipe connected to the upper end of the transformer body, so that the oil sucked by the liquid suction pipe can be passed through the drain pipe to the transfer box for cooling through the refrigeration pipe.

Compared with the existing technology, the beneficial effects of the present invention are: the oil-immersed transformer with a heat dissipation structure facilitates the installation, fixation and shock absorption of the transformer body, and facilitates repair of the transformer after sensing that the temperature of the transformer body does not rise. The oil in the body is sucked and refrigerated and then passed through to circulate, so that the heat dissipation effect is good, and it is easy to replace and repair the refrigeration pipe and the liquid pump, and it is easy to cover the liquid pump to make it have a long service life. ;

1. There is a base plate, mounting holes, a receiving plate and a transformer body. Since the lower end of the base plate is symmetrically provided with mounting holes, the upper surface of the receiving plate above the base plate is fitted with the transformer body, and the left and right ends of the receiving plate are engaged on the inside. The adjusting rod is connected with an outer end of the fixed worm gear, and the lower side of the worm gear is meshed with a worm that is engaged and limited by a limiting plate. The outer side of the adjusting rod is threadedly connected with a clamping plate that engages with the receiving plate. The clamping plate is a single body. The upper end is attached to the outside of the lower end of the transformer body, so it is easy to install and fix the transformer body;

2. A limit slot, a receiving plate, a fixed rod and a shock-absorbing spring are provided. Since the fixed rod is symmetrically fixed on the lower side of the outer end of the receiving plate, the lower end of the fixed rod is engaged and non-detachably connected to the limit slot opened inside the bottom plate. A shock-absorbing spring is nested outside the upper end of the fixed rod. The upper and lower ends of the shock-absorbing spring are closely connected to the receiving plate and the bottom plate respectively, so it is convenient to absorb the shock of the transformer body;

3. There is a transformer body, inner heat dissipation fins, outer heat dissipation fins and a temperature sensor. Since the outer end of the transformer body is fixedly connected with the inner heat dissipation fin and the outer heat dissipation fin arranged to fit outside the inner heat dissipation fin, the receiving plate A temperature sensor is installed on the inner side of the lower right front end of the shield, and a controller and a display are installed on the inner side of the fixed installation plate under the shielding plate. A transfer box is installed on the inner side of the lower end of the shielding plate and is nested with the bottom plate. The transfer box is connected to the bottom plate through a liquid pump and The liquid suction pipe is connected to the lower end of the transformer body through Unicom, and the transfer box is connected to the upper end of the transformer body through the liquid pipe. Therefore, it is convenient to pump out the oil in the transformer body after sensing that the temperature of the transformer body cannot rise. Suction and cooling are then introduced, and this cycle is used to make the heat dissipation effect good;

3. There is a transfer box, a refrigeration pipe, a box cover and a liquid pump. Since the refrigeration pipe and the transfer box are nested, the transfer box and the liquid pump are connected to the tank cover with screws, and there is a liquid pump outside. The shielding plate is fixedly connected to the bottom plate, so it is easy to replace and repair the refrigeration pipe and the liquid pump, and it is also convenient to shield the liquid pump, so that it has a long service life.

Description of drawings

Figure 1 is a schematic front view of the structure of the present invention;

Figure 2 is a side sectional structural schematic diagram of the present invention;

Figure 3 is a schematic cross-sectional structural diagram of the present invention;

Figure 4 is a schematic side cross-sectional structural diagram of the connection between the worm gear and the worm according to the present invention;

Figure 5 is a schematic structural diagram of the connection between the clamping plate and the receiving plate according to the present invention;

Figure 6 is a schematic side cross-sectional structural diagram of the connection between the fixed rod and the bottom plate of the present invention;

Figure 7 is a schematic structural diagram of the rear view of the connection between the shielding plate and the bottom plate of the present invention;

Figure 8 is a schematic diagram of the control structure of the present invention.

In the picture: 1. Base plate; 2. Mounting hole; 3. Limiting slot; 4. Accepting plate; 5. Transformer body; 6. Inner cooling fins; 7. External cooling fins; 8. Worm gear; 9. Worm; 10. Limiting plate; 11. Adjusting rod; 12. Clamping plate; 13. Fixed rod; 14. Damping spring; 15. Temperature sensor; 16. Shielding plate; 17. Installation plate; 18. Controller; 19. Monitor ; 20. Transfer box; 21. Refrigeration pipe; 22. Box cover; 23. Liquid pump; 24. Liquid pipe; 25. Drainage pipe; 26. Liquid pipe; 27. Filter.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Please refer to Figures 1-8. The present invention provides a technical solution: an oil-immersed transformer with a heat dissipation structure, including a base plate 1, a mounting hole 2, a limiting slot 3, a receiving plate 4, a transformer body 5, and inner heat dissipation fins. Fin 6, external cooling fin 7, worm gear 8, worm 9, limiting plate 10, adjusting rod 11, clamping plate 12, fixed rod 13, shock absorbing spring 14, temperature sensor 15, shielding plate 16, mounting plate 17, control 18, display 19, transfer box 20, refrigeration pipe 21, box cover 22, liquid suction pump 23, liquid suction pipe 24, liquid discharge pipe 25, liquid pipe 26 and filter 27, the inside of the base plate 1 is symmetrically provided with installation hole 2, and the outside of the mounting hole 2 is provided with a limiting groove 3 opened inside the bottom plate 1, the left and right sides of the receiving plate 4 are provided with worm gears 8, and the lower side of the worm gear 8 is provided with a meshing connection with it Worm 9, a plurality of inner heat dissipation fins 6 are fixedly connected to the inner side of the outer end of the transformer body 5 at equal intervals, and the outer sides of the inner heat dissipation fins 6 are fitted with outer heat dissipation fins 7 fixedly connected to the transformer body 5, and the shielding plate A mounting plate 17 is fixedly connected to the lower side of the upper middle part of 16, and a controller 18 and a display 19 are embedded in the mounting plate 17. The transfer box 20 is located inside the lower end of the shielding plate 16, and the transfer box 20 is nested with a lower end inside. Refrigeration pipe 21;

Working principle: When using this oil-immersed transformer with a heat dissipation structure, as shown in Figure 1, Figure 3, Figure 4 and Figure 5, first place the base plate 1 on the transformer body 5 to be used, and then insert the screws through the base plate. 1 inside the symmetrically opened mounting holes 2 in order to install and fix the bottom plate 1, then the liquid pipe 26 connected to the lower left end of the transfer box 20 can be threadedly connected to the lower end of the transformer body 5, and then the transformer body 5 can be placed The upper surface of the middle part of the receiving plate 4 is above the bottom plate 1, and the left and right sides of the receiving plate 4 can be rotated and fixedly connected to the worm 9 engaged in the limiting plate 10, so that the worm 9 rotates under the engaging limit of the limiting plate 10. A worm gear 8 is engaged and connected to the worm 9. Both sides of the worm gear 8 are respectively connected with the receiving plate 4 and the limiting plate 10, and the middle part of the worm gear 8 is fixedly connected with an adjusting rod 11 that engages with the receiving plate 4 and penetrates through it. Therefore, through the worm 9, it is convenient for the worm gear 8 to drive the adjusting rod 11 to rotate under the engagement limit of the receiving plate 4. Since the outer end of the adjusting rod 11 is threadedly connected with a clamping plate 12 that engages with the accepting plate 4, the clamping plate The upper end of 12 is higher than the upper surface of the receiving plate 4, so the rotation of the adjusting rod 11 facilitates the movement of the clamping plate 12 under the engagement limit of the receiving plate 4, so that the upper end of the clamping plate 12 fits the transformer The outside of the body 5, so as to facilitate the installation and fixation of the transformer body 5;

As shown in Figures 1, 2 and 6, during the operation of the transformer body 5, a fixing rod 13 is symmetrically fixed through the lower side of the outer end of the receiving plate 4, and the lower end of the fixing rod 13 is connected to the limiting slot 3 opened inside the base plate 1 In order to engage in a non-detachable connection, the upper end of the fixed rod 13 is nested with a shock absorbing spring 14 that is closely connected to the bottom plate 1 and the receiving plate 4. Therefore, it is convenient for the receiving plate 4 to be connected to the fixed rod 13 and the shock absorbing spring 14 through the fixed rod 13 and the shock absorbing spring 14. The base plate 1 is telescopically connected, thereby facilitating the shock-absorbing elasticity of the shock-absorbing spring 14 to facilitate the shock-absorbing of the transformer body 5 fixed on the receiving plate 4, reducing damage to the transformer body 5 due to vibration, and allowing the transformer body to be 5. The inner heat dissipation fins 6 fixed at equal intervals at the outer ends and the outer heat dissipation fins 7 arranged in close contact with each other on the outside. Under the heat dissipation performance of the inner heat dissipation fins 6 and the outer heat dissipation fins 7, the transformer body is 5 for heat dissipation;

As shown in Figure 2, Figure 3, Figure 7 and Figure 8, and the controller 18 installed in the mounting plate 17 can be used to control the temperature sensor 15 installed in the lower right front end of the receiving plate 4 and the display 19 installed in the mounting plate 17. Cooperate with the operation so that the temperature sensor 15 senses the temperature of the transformer body 5 and the display 19 displays the temperature data sensed by the temperature sensor 15. When the temperature sensor 15 senses that the temperature of the transformer body 5 cannot rise, , the controller 18 controls the refrigerating pipe 21 nested in the transfer box 20 and the liquid pump 23 fixed on the box cover 22 to operate. Since the box cover 22 and the refrigerating pipe 21 are connected with screws, the liquid pump 23 A liquid suction pipe 24 and a liquid discharge pipe 25 are threadedly connected, and the outer ends of the liquid suction pipe 24 and the liquid discharge pipe 25 are connected to the transformer body 5 and the transfer box 20 respectively. Therefore, it is convenient for the liquid suction pipe 24 to connect the transformer body 5 The oil inside is pumped into the transfer box 20 through the drain pipe 25, and is cooled by the refrigeration pipe 21, and then passed into the transformer body 5 through the liquid pipe 26, thereby facilitating the circulation of the oil in the transformer body 5. The suction refrigeration is then introduced, so that it has a good heat dissipation effect on the transformer body 5, and it is convenient to fix the filter 27 nested and connected to the transfer box 20 through the box cover 22 to filter the circulating oil. Prevent residues and other factors from affecting the use of the transformer body 5;

As shown in Figure 1, Figure 2 and Figure 3, after the transformer has been used for a long time, the transfer box 20 and the liquid pump 23 can be disconnected from the screws fixedly connected to the box cover 22, so that the liquid pump 23 can be replaced and repaired, and the liquid pump 23 can be easily removed. The refrigeration pipes 21 nested in the transfer box 20 can be replaced and repaired, and the filter impurities in the filter screen 27 can be easily cleaned, and a shielding plate 16 fixedly connected to the base plate 1 is provided on the outside of the liquid pump 23. The shielding plate 16 The outer cross-section is larger than the outer cross-section of the transfer box 20, so it is convenient to shield the liquid pump 23, so that it has a long service life. The above completes a series of operations of the oil-immersed transformer with a heat dissipation structure, and its electrical components The components are all existing technologies and will not be described in detail here.

The content not described in detail in this specification belongs to the prior art known to those skilled in the art. The standard parts used in the present invention can be purchased from the market, and the special-shaped parts can be customized according to the instructions and drawings. , the specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connections adopt conventional methods in the prior art. The connection method will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (8)

1. An oil-immersed transformer with a heat dissipation structure, comprising: the transformer comprises a bottom plate (1), a bearing plate (4) used for bearing and limiting, a transformer body (5) attached to the bearing plate (4) and a shielding plate (16) fixedly connected with the upper surface of the front end of the bottom plate (1);

characterized by further comprising:

the mounting holes (2) are symmetrically formed in the bottom plate (1), and limit grooves (3) formed in the bottom plate (1) are formed in the outer sides of the mounting holes (2);

the left side and the right side of the bearing plate (4) are respectively provided with a worm wheel (8) in an attaching mode, and the lower side of the worm wheel (8) is provided with a worm (9) in meshed connection with the worm wheel;

a plurality of inner radiating fins (6) are fixedly connected to the inner side of the outer end of the transformer body (5) at equal intervals, and outer radiating fins (7) fixedly connected with the transformer body (5) are attached to the outer sides of the inner radiating fins (6);

the lower side of the middle part of the upper end of the shielding plate (16) is fixedly connected with a mounting plate (17), and a controller (18) and a display (19) are embedded in the mounting plate (17);

the transfer box (20), transfer box (20) are located the lower extreme inboard of shielding plate (16), and the inboard nest of lower extreme of transfer box (20) is provided with refrigeration pipe (21).

2. An oil immersed transformer with heat dissipation structure as defined in claim 1, wherein: limiting plates (10) which are connected with the worm (9) in a clamping and non-detachable mode are attached to the outer sides of the worm wheels (8), the limiting plates (10) are symmetrically and fixedly connected with the bearing plates (4), and adjusting rods (11) which are fixed with the worm wheels (8) are connected to the inner sides of the left end and the right end of the bearing plates (4) in a clamping mode.

3. An oil immersed transformer with heat dissipation structure as defined in claim 2, wherein: the outside threaded connection who adjusts pole (11) has grip block (12) with accepting board (4) block, and the upper end of grip block (12) is higher than the upper surface of accepting board (4) to grip block (12) monomer laminating is in the lower extreme outside of transformer body (5).

4. An oil immersed transformer with heat dissipation structure as defined in claim 1, wherein: the fixing rod (13) is symmetrically fixed at the lower side of the outer end of the bearing plate (4), the lower end of the fixing rod (13) is clamped and detachably connected with the inner side of the limit groove (3), and the bearing plate (4) and the fixing rod (13) are respectively of a hollow structure and a convex structure.

5. The oil-immersed transformer with heat dissipation structure according to claim 4, wherein: the upper end outside of dead lever (13) nestification is provided with damping spring (14), and damping spring's (14) upper and lower both sides are respectively with accepting board (4) and bottom plate (1) for laminating and are connected to the inboard temperature sensor (15) of inlaying of the right front end of accepting board (4).

6. An oil immersed transformer with heat dissipation structure as defined in claim 1, wherein: the transfer box (20) is nested and attached to the inner side of the front end of the bottom plate (1), the outer cross section of the shielding plate (16) is larger than that of the transfer box (20), and a box cover (22) fixed with the transfer box (20) through screws is attached to the transfer box (20).

7. The oil-immersed transformer with heat dissipation structure according to claim 6, wherein: the upper surface screw fixed mounting of case lid (22) has drawing liquid pump (23), and the rear end screw thread of drawing liquid pump (23) is connected with drawing liquid pipe (24) with transformer body (5) lower extreme UNICOM to the downside of case lid (22) fixedly connected with and well rotor case (20) nested filter screen (27) of laminating.

8. The oil-immersed transformer with heat dissipation structure according to claim 7, wherein: the left end of the liquid drawing pump (23) is communicated with a liquid discharge pipe (25) which is in threaded connection with the tank cover (22), the liquid drawing pipe (24) is communicated with the transfer tank (20) through the liquid drawing pump (23) and the liquid discharge pipe (25), and the inner side of the left lower end of the transfer tank (20) is in threaded connection with a liquid through pipe (26) which is communicated with the upper end of the transformer body (5).