CN112530671A

CN112530671A - Oil-immersed transformer

Info

Publication number: CN112530671A
Application number: CN202011303711.8A
Authority: CN
Inventors: 吴江丽
Original assignee: Zhejiang Longcheng Power Equipment Co ltd
Current assignee: Zhejiang Longcheng Power Equipment Co ltd
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-03-19

Abstract

The invention provides an oil-immersed transformer, which comprises a box body, a water tank, an oil conservator, a heat dissipation device, a cleaning device, a damping device and an explosion-proof device, the box body and the heat dissipation device are made of high-quality cold-rolled steel plates, the inner wall of the box body is of a hollow structure, a wiring port is arranged on the inner wall of the top of the box body in a penetrating way, a plurality of rainwater one-way collecting doors are arranged on the inner wall of the top of the box body, an oil conservator is connected on the left side of the top of the box body in a penetrating way, and the two sides of the box body are connected with a heat dissipation device in a penetrating way, the bottom in the box body is provided with a water tank, the top of the water tank is provided with a damping device in a penetrating way, the invention provides an oil-immersed transformer, and aims to solve the problems that insect birds nest in gaps of a radiator to influence the heat dissipation effect when the oil-immersed transformer is erected in the field, prevent the explosion of the inside of the oil-immersed transformer when the temperature is over-high and prevent the temperature reduction effect of the oil-immersed transformer by independently utilizing radiating fins from being unsatisfactory.

Description

Oil-immersed transformer

Technical Field

The invention relates to the technical field of transformers, in particular to an oil-immersed transformer.

Background

The transformer is a device for changing alternating voltage by utilizing the principle of electromagnetic induction, and has the main functions of: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformer), and the like. According to the application, the method can be divided into: distribution transformers, fully enclosed transformers, combined transformers, dry transformers, oil immersed transformers, single phase transformers, etc.; the oil-immersed transformer has the characteristics of low loss, large capacity and low price, and the common power transformer at present is the oil-immersed transformer; the safe operation and the life of the transformer depend on the safety and the reliability of the insulation of the transformer winding to a great extent, but the oil temperature of the oil-immersed transformer can be increased under the long-time working condition, the winding temperature can exceed the insulation tolerance temperature to cause insulation damage when the oil-immersed transformer is in a high-temperature state for a long time, the aging speed of internal components can be accelerated, the transformer cannot work normally, and therefore the heat dissipation of the transformer is very important.

Disclosure of Invention

In order to solve the technical problem, the invention provides an oil-immersed transformer, which aims to solve the problems that insect birds nest at a radiator part of an oil-immersed transformer erected in the field to influence the radiating effect and the like.

The invention relates to an oil-immersed transformer, which is achieved by the following specific technical means: the utility model provides an oil-immersed transformer, includes box, water tank, conservator, heat abstractor, cleaning device, damping device, explosion-proof equipment, box and heat abstractor are made by high-quality cold-rolled steel sheet, the box inner wall is hollow structure, and runs through on the inner wall at box top and be equipped with the wiring mouth, and seted up the one-way collection door of a plurality of rainwater on the inner wall at box top, box top left side through connection has the conservator, and box both sides through connection have heat abstractor, the bottom is equipped with the water tank in the box, the water tank top is run through and is equipped with damping device, and is equipped with explosion-proof equipment among the damping device.

Further, the box inner wall is hollow structure, and the hollow position in the inner wall forms to the cooling water course, the whole box of cooling water course parcel, and at cooling water course left side end and water tank top through connection, cooling water course right side end runs through in the inside middle and lower segment that is located the water tank right side of water tank.

Further, water inlet check valve has been seted up to water tank top left end, and water inlet check valve and cooling water course through connection, the cooling water course end in the hypomere in the water tank right side is equipped with out water check valve, and goes out water check valve and cooling water course through connection, the top is equipped with a plurality of pressure water columns in the water tank, and the inside swing joint of pressure water column has damping device, water tank bottom both ends are run through and are equipped with end pressure release fore-set.

Further, damping device locates in the box at water tank top, bottom swing joint has the shock attenuation board in the box, and is equipped with damping spring between shock attenuation board and the water tank top, be equipped with explosion-proof pressure release pole in the damping spring at left and right sides both ends, and be equipped with the shock strut in the middle damping spring, explosion-proof pressure release pole and shock strut run through the water tank top, and explosion-proof pressure release pole and shock strut end are equipped with the water pressure board, the water pressure board is located the pressure water post, and leaves the air between pressure water post and water pressure board.

Furthermore, the explosion-proof device is divided into an upper part and a lower part, the upper part is arranged at two ends of a damping plate, the lower part is arranged at the bottom of the water tank, two ends of the damping plate are connected with explosion-proof pressure relief rods in a penetrating manner, pressure relief doors are embedded in the explosion-proof pressure relief rods, the pressure relief doors are Contraband-shaped, springs are arranged on the inner sides of the vertical surfaces of Contraband, strong spring one-way shafts are arranged at the bottoms of the explosion-proof pressure relief rods, arc trigger doors are fixedly connected to the bottoms of the strong spring one-way shafts, bottom pressure relief top pillars are arranged at two ends of the bottom of the water tank, strong spring one-way shafts are arranged at two ends of the tops of the bottom pressure relief top pillars, the bottom pressure relief doors are fixedly connected to the insides of the strong spring one-way.

Furthermore, the upper end and the lower end of the inner side of the heat dissipation device penetrate through the box body, the top of the heat dissipation device is provided with an oil inlet pipe, an oil return pipe is arranged at the bottom of the heat dissipation device, an oil return one-way valve is arranged at the inner side of the oil return pipe, a plurality of heat dissipation fins are connected between the oil inlet pipe and the oil return pipe in a penetrating way, the interior of each radiating fin is of a hollow structure, radiating fin spacing grooves are reserved among the radiating fins, a central bearing in the oil inlet pipe is connected with an oil plug threaded rod, an oil plug is in threaded connection with the oil plug threaded rod, an oil plug return inhaul cable is fixedly connected between the front end of the oil plug and the front end of the oil inlet pipe, an inner driving thread is arranged at the axis of the oil plug, and one side of the oil plug is provided with a threaded rod opening, the bearing in the heat radiating fin spacing groove is connected with a vertical threaded rod, and the vertical threaded rod penetrates through the oil inlet pipe and is meshed with the oil plug threaded rod, and the vertical threaded rod in the radiating fin spacing groove is meshed with a cleaning device.

Furthermore, the center of the cleaning device is provided with a rotating thread, the rotating thread is meshed with a vertical threaded rod, air cavities are arranged in the left end, the right end and the upper end of the cleaning device, the outer side of each air cavity is provided with an air outlet, bearings at the two ends of the cleaning device are connected with rotating wheels, rotating wheel shaft threaded ports are fixedly connected at the axle centers of the rotating wheels, rotating wheel shaft threaded ports are formed in the rotating wheel shafts and meshed with transmission shafts, the transmission shafts extend into the air cavities, air cavity wheels are connected to the bearings at the inner sides of the air cavities, air cavity wheel threaded shafts are arranged at the centers of the air cavity wheels and meshed with the transmission shafts extending into the air inlet cavities, movable shafts are fixedly connected to the air cavity wheels, push-pull rods are connected to bearings at the tops of the movable shafts, one ends of the push-pull rods are.

Has the advantages that:

(1) through being equipped with the oil plug, will drive the oil plug threaded rod and rotate when the oil plug is promoted by the cooling oil, the oil plug threaded rod drives cleaning device up-and-down motion simultaneously, plays the effect of debris clearance such as dust between the fin.

(2) Through being equipped with explosion-proof equipment, when transformer internal pressure reached certain peak value, explosion-proof pressure release pole will with the contact of end pressure release fore-set and switch on internal piping and release the transformer with inside high-pressure oil circuit, realize preventing that internal pressure is too high to produce the effect of explosion.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic view of the overall cross-sectional structure of the present invention.

FIG. 3 is an enlarged view of the structure at A in FIG. 2 according to the present invention.

Fig. 4 is a schematic structural diagram of a heat dissipation device of the present invention.

Fig. 5 is a schematic view of the oil plug structure of the present invention.

FIG. 6 is a schematic view of the cleaning device of the present invention.

In fig. 1 to 6, the correspondence between the component names and the reference numbers is:

1-box body, 101-wiring port, 102-rainwater one-way collecting door, 103-cooling water channel, 2-water tank, 201-water inlet one-way valve, 202-water outlet one-way valve, 203-water pressing column, 3-conservator, 4-heat radiating device, 401-heat radiating fin, 402-oil plug, 403-oil plug threaded rod, 404-oil plug return cable, 405-heat radiating fin spacing groove, 406-vertical threaded rod, 407-oil return one-way valve, 408-threaded rod opening, 409-internal driving thread, 410-oil inlet pipe, 411-oil return pipe, 5-cleaning device, 501-rotating thread, 502-rotating wheel, 503-rotating wheel shaft, 504-rotating wheel shaft threaded port, 505-air cavity, 506-air cavity wheel, 507-air cavity wheel threaded shaft, 507-air cavity wheel, 508-movable shaft, 509-push-pull rod, 510-air plug, 511-air outlet, 6-damping device, 601-damping plate, 602-damping spring, 603-damping strut, 604-water pressure plate, 7-explosion-proof device, 701-explosion-proof pressure relief rod, 702-pressure relief door, 703-spring, 704-strong spring one-way shaft, 705-arc trigger door, 706-bottom pressure relief door and 707-bottom pressure relief top column.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

Example (b):

as shown in figures 1 to 6: the utility model provides an oil-immersed transformer, the power distribution box comprises a box body (1, the water tank 2, the conservator 3, heat abstractor 4, cleaning device 5, damping device 6, explosion-proof device 7, wherein, box 1 and heat abstractor 4 are made by high-quality cold-rolled steel sheet, 1 inner wall of box is hollow structure, and run through on the inner wall at 1 top of box and be equipped with wiring mouth 101, and seted up the one-way collection door 102 of a plurality of rainwater on the inner wall at 1 top of box, 1 top left side through connection of box has the

conservator

3, and 1 both sides through connection of box has heat abstractor 4, the bottom is equipped with water tank 2 in the

box

1, 2 tops of water tank run through and are equipped with damping device 6, and be equipped.

2 wherein, 1 inner wall of box is hollow structure, and the hollow position in the inner wall forms into cooling water course 103, and cooling water course 103 wraps up whole box 1, and at cooling water course 103 left side end and 2 top through connections of water tank, the terminal middle and lower sections that are located 2 right sides of water tank that run through in 2 inside water tanks of cooling water course 103 right sides. When raining, rainwater enters the cooling water channel 103 through the rainwater one-way collecting door 102 and is collected in the water tank 2.

Wherein, water inlet check valve 201 has been seted up to 2 top left ends of water tank, and water inlet check valve 201 and cooling water course 103 through connection, cooling water course 103 end in the hypomere in 2 right sides of water tank is equipped with out water check valve 203, and goes out water check valve 203 and cooling water course 103 through connection, the top is equipped with a plurality of pressure water columns 203 in the water tank 2, and the inside swing joint of pressure water column 203 has damping device 6, water tank 2 bottom both ends are run through and are equipped with end pressure release fore-set 707. The left side is provided with a water inlet one-way valve 201, the right side is provided with a water outlet one-way valve 203 to enable the cooling water channel 103 to form a circulating pipeline, and the pressurized water column 203 wraps the air reserved in the pressurized water column.

Wherein, damping device 6 locates in the box 1 at water tank 2 top, bottom swing joint has shock attenuation board 601 in the box 1, and be equipped with damping spring 602 between shock attenuation board 601 and the water tank 2 top, be equipped with explosion-proof pressure release pole 701 in the damping spring 602 at left and right sides both ends, and be equipped with shock attenuation pillar 603 in the middle damping spring 602, explosion-proof pressure release pole 701 and shock attenuation pillar 603 run through the water tank 2 top, and explosion-proof pressure release pole 701 and shock attenuation pillar 603 end are equipped with water pressure board 604, water pressure board 604 is located pressure post 203, and leave the air between pressure post 203 and water pressure board 604. When the transformer is electrified to work and vibrate, the damping plate 601 is pressed downwards, so that the explosion pressure relief rod 701 and the damping strut 603 at the bottom of the damping plate 601 move downwards, and meanwhile, the explosion pressure relief rod 701 and the water pressure plate 604 at the bottom of the damping strut 603 move downwards to compress the internal space of the water tank 2, so that water is squeezed into the cooling water channel 103 from the water outlet one-way valve 202, and the water circulation cooling in the tank body 1 is realized.

The explosion-proof device 7 is divided into an upper part and a lower part, the upper part is arranged at two ends of a damping plate 601, the lower part is arranged at the bottom of the water tank 2, two ends of the damping plate 601 are connected with an explosion-proof pressure relief rod 701 in a penetrating manner, a pressure relief door 702 is embedded in the explosion-proof pressure relief rod 701, the pressure relief door 702 is Contraband-shaped, a spring 703 is arranged on the inner side of a vertical plane Contraband, a strong spring one-way shaft 704 is arranged at the bottom of the explosion-proof pressure relief rod 705, an arc-shaped trigger door 705 is fixedly connected to the bottom of the strong spring one-way shaft 704, bottom pressure relief top pillars 707 are arranged at two ends of the bottom of the water tank 2, strong spring one-way shafts 704 are arranged at two ends of the top of the bottom pressure relief top pillars 707, a bottom pressure relief door 706 is. When the internal pressure is increased to enable the damping plate 601 to press downwards to enable the explosion-proof pressure relief rod 701 to be in contact with the bottom pressure relief top pillar 707, the arc-shaped trigger door 705 is turned inwards under the action of the strong spring one-way shaft 704, the arc-shaped trigger door 705 is in contact with the pressure relief door 702, the pressure relief door 702 is retracted into the inner wall of the explosion-proof pressure relief rod 701 to enable the middle of the explosion-proof pressure relief rod to be provided with a gap to enable the high pressure inside the explosion-proof pressure relief rod to be released, and the high-pressure transformer oil pushes the bottom pressure relief door 706 to.

Wherein, the upper and lower ends of the inner side of the heat dissipating device 4 penetrate through the box body 1, the top of the heat dissipating device 4 is provided with an oil inlet pipe 410, the bottom of the heat dissipating device 4 is provided with an oil return pipe 411, the inner side of the oil return pipe 411 is provided with an oil return one-way valve 407, a plurality of radiating fins 401 penetrate between the oil inlet pipe 410 and the oil return pipe 411, the inner part of the radiating fins 401 is of a hollow structure, a radiating fin spacing groove 405 is reserved between the radiating fins 401, the central bearing of the inner part of the oil inlet pipe 410 is connected with an oil plug threaded rod 403, the oil plug threaded rod 403 is in threaded connection with an oil plug 402, an oil plug return cable 404 is fixedly connected between the front end of the oil plug 402 and the front end of the oil inlet pipe 410, the axle center of the oil plug 402 is provided with an internal driving thread 409, one side of the oil plug 402, the cleaning device 5 is engaged with the vertical threaded rod 406 in the fin space groove 405. When the transformer oil expands along with the temperature rise, the oil plug 402 is pushed to move towards the outer side of the oil inlet pipe 410, when the oil plug 402 moves, the inner driving thread 409 is utilized to drive the oil plug threaded rod 403 to rotate, and meanwhile, the vertical threaded rod 406 is driven to rotate, so that the cleaning device 5 works.

Wherein, the center of the cleaning device 5 is provided with a rotary screw 501, the rotary screw 501 is engaged with the vertical screw rod 406, air chambers 505 are arranged in the left, right, upper and lower ends of the cleaning device 5, an air outlet 511 is arranged at the outer side of the air cavity 505, two ends of the cleaning device 5 are connected with rotating wheels 502 through bearings, the axle center of the rotating wheel 502 is fixedly connected with a rotating wheel axle 503, a rotating wheel axle threaded opening 504 is arranged on the rotating wheel axle 503, a transmission shaft is engaged and connected with the threaded port 504 of the rotating wheel shaft, the transmission shaft extends into the air cavity 505, the bearing at the inner side of the air cavity 505 is connected with an air cavity wheel 506, an air cavity wheel threaded shaft 507 is arranged at the center of the air cavity wheel 506, the air cavity wheel threaded shaft 507 is meshed and connected with a transmission shaft extending into the air cavity 505, a movable shaft 508 is fixedly connected on the air cavity wheel 506, and the top bearing of the movable shaft 508 is connected with a push-pull rod 509, one end of the push-pull rod 509 is connected with the top bearing of the movable shaft 508, and the other end is fixedly connected with an air plug 510. When the vertical threaded rod 406 rotates, the cleaning device 5 rotates and lifts under the action of the rotating thread 501, when the cleaning device contacts the outer wall of the radiating fin 401, the rotating wheel 502 rotates and drives the air cavity wheel 506 inside the air cavity 505 to rotate through the transmission shaft, so that the push-pull rod 509 on the air cavity wheel 506 moves back and forth under the action of the movable shaft, and the air plug 510 at the top end of the push-pull rod 509 moves back and forth inside the air cavity 505 to generate air pressure to clean and cool the outer wall of the radiating fin 401.

The working principle is as follows:

when meeting the rainy day, the rainwater enters the cooling water channel 103 through the rainwater one-way collecting door 102 and is collected in the water tank 2.

When the temperature of the transformer oil inside the transformer rises and expands, the oil plug 402 inside the heat dissipation device 4 is pushed outwards, so that the transformer oil enters the oil inlet pipe 410, is dissipated through the inside of the heat dissipation fin 401, and finally flows to the oil return pipe 411 and enters the box body 1 through the oil return one-way valve 407.

When the oil plug 402 moves outwards, the internal driving screw thread 409 drives the oil plug screw rod 403 to rotate and drives the vertical screw rod 406 to rotate, when the vertical screw rod 406 rotates, the cleaning device 5 is driven to rotate up and down on the vertical screw rod 406, when the cleaning device 5 contacts the outer wall of the radiating fin 401, the rotating wheel 502 rotates and drives the rotating wheel shaft 503 and the transmission shaft to rotate so as to drive the air cavity wheel 506 inside the air cavity 505 to rotate, the push-pull rod 509 on the air cavity wheel 506 moves back and forth under the action of the movable shaft, the air plug 510 at the top end of the push-pull rod 509 moves back and forth inside the air cavity 505 to generate air pressure to clean and cool the outer wall of the radiating fin 401, when the temperature drops, the oil plug 402 returns to the original position under the driving of the oil plug return cable 404, and other devices reversely operate to the original position.

When the transformer works, certain vibration is generated, the vibration is reduced by the damping plate 601 through the spring 602 at the bottom of the damping plate, the explosion pressure relief rod 701 and the damping strut 603 at the bottom of the damping plate 601 move up and down, when the explosion pressure relief rod 701 and the damping strut 603 move downwards, the water pressure plate 604 is driven to extrude water inside the water tank 2, when the water tank 2 is extruded, water enters the cooling water channel 103 from the water outlet one-way valve 202 due to the reduction of the inner space, so that the water cools the tank body 1, more and more water enters along with the extrusion, the water moves to the water inlet one-way valve 201 along the cooling water channel 103, enters the water tank 2 and the cooled water and is cooled.

When the oil conservator 3 is filled with excessive pressure inside the box body 1, the damping plate 601 is pressed downwards, the arc-shaped trigger door 705 is turned inwards under the action of the strong spring one-way shaft 704 when the explosion-proof pressure relief rod 701 is in contact with the bottom pressure relief top pillar 707, the arc-shaped trigger door 705 is in contact with the pressure relief door 702, the pressure relief door 702 is retracted into the inner wall of the explosion-proof pressure relief rod 701, a gap is formed in the middle of the explosion-proof pressure relief rod 701, high pressure inside the explosion-proof pressure relief rod is released, high-pressure transformer oil pushes the bottom pressure relief door 706 to release pressure out of the transformer, and explosion caused by excessive pressure inside the transformer is prevented.

Claims

1. The utility model provides an oil-immersed transformer, includes box (1), water tank (2), conservator (3), heat abstractor (4), cleaning device (5), damping device (6), explosion-proof equipment (7), its characterized in that: the utility model discloses a solar energy water heater, including box (1), box (1) and heat abstractor (4), box (1) inner wall is hollow structure, and runs through on the inner wall at box (1) top and be equipped with wiring mouth (101), and seted up a plurality of one-way collection doors of rainwater (102) on the inner wall at box (1) top, box (1) top left side through connection has conservator (3), and box (1) both sides through connection has heat abstractor (4), the bottom is equipped with water tank (2) in box (1), water tank (2) top is run through and is equipped with damping device (6), and is equipped with explosion-proof equipment (7) in damping device (6).

2. Oil filled transformer according to claim 1, characterized in that: the inner wall of the box body (1) is of a hollow structure, a hollow position in the inner wall is formed into a cooling water channel (103), the cooling water channel (103) wraps the whole box body (1), the left end of the cooling water channel (103) is connected with the top of the water tank (2) in a penetrating mode, and the right end of the cooling water channel (103) penetrates through the middle lower section of the inside of the water tank (2) on the right side of the water tank (2).

3. Oil filled transformer according to claim 2, characterized in that: water inlet check valve (201) have been seted up to water tank (2) top left end, and water inlet check valve (201) and cooling water course (103) through connection, cooling water course (103) end in the hypomere of water tank (2) right side is equipped with out water check valve (203), and goes out water check valve (203) and cooling water course (103) through connection, the top is equipped with a plurality of pressure water columns (203) in water tank (2), and presses water column (203) inside swing joint to have damping device (6), water tank (2) bottom both ends are run through and are equipped with end pressure release fore-set (707).

4. Oil filled transformer according to claim 1, characterized in that: damping device (6) are located in box (1) at water tank (2) top, bottom swing joint has shock attenuation board (601) in box (1), and is equipped with damping spring (602) between shock attenuation board (601) and water tank (2) top, be equipped with explosion-proof pressure release pole (701) in damping spring (602) at left and right sides both ends, and be equipped with shock attenuation pillar (603) in middle damping spring (602), explosion-proof pressure release pole (701) and shock attenuation pillar (603) run through water tank (2) top, and explosion-proof pressure release pole (701) and shock attenuation pillar (603) end are equipped with water pressure board (604), water pressure board (604) are located pressure water post (203), and leave the air between pressure water post (203) and water pressure board (604).

5. Oil filled transformer according to claim 1, characterized in that: the explosion-proof device (7) is divided into an upper part and a lower part, the upper part is arranged at two ends of the damping plate (601), the lower part is arranged at the bottom of the water tank (2), two ends of the damping plate (601) are connected with an explosion-proof pressure relief rod (701) in a penetrating way, and a pressure relief door (702) is embedded in the inner part of the explosion-proof pressure relief rod (701), the pressure relief door (702) is Contraband-shaped, a spring (703) is arranged on the inner side of the vertical surface of the pressure relief valve Contraband, a strong spring one-way shaft (704) is arranged at the bottom of the explosion-proof pressure relief rod (705), an arc-shaped trigger door (705) is fixedly connected with the bottom of the strong spring one-way shaft (704), bottom pressure relief top pillars (707) are arranged at two ends of the bottom of the water tank (2), and two ends of the top of the bottom pressure relief top pillar (707) are provided with a strong spring one-way shaft (704), and a bottom pressure relief door (706) is fixedly connected inside the strong spring one-way shaft (704), the pushing pressure required by the strong spring one-way shaft (704) is higher than that of the water outlet one-way valve (202).

6. Oil filled transformer according to claim 1, characterized in that: the upper end and the lower end of the inner side of the heat dissipation device (4) penetrate through the box body (1), an oil inlet pipe (410) is arranged at the top of the heat dissipation device (4), an oil return pipe (411) is arranged at the bottom of the heat dissipation device (4), an oil return one-way valve (407) is arranged on the inner side of the oil return pipe (411), a plurality of cooling fins (401) penetrate through the oil inlet pipe (410) and the oil return pipe (411), the interior of each cooling fin (401) is of a hollow structure, a cooling fin spacing groove (405) is reserved between the cooling fins (401), an oil plug threaded rod (403) is connected to a central bearing in the oil inlet pipe (410), an oil plug (402) is in threaded connection with the oil plug threaded rod (403), an oil plug return cable (404) is fixedly connected between the front end of the oil plug (402) and the front end of the oil inlet pipe (410), and an, and threaded rod opening (408) have been seted up to oil plug (402) one side, the bearing is connected with vertical threaded rod (406) in fin interval groove (405), and vertical threaded rod (406) run through in advance oil pipe (410) and be connected with the meshing of oil plug threaded rod (403), the meshing is connected with cleaning device (5) on the vertical threaded rod (406) in fin interval groove (405).

7. Oil filled transformer according to claim 6, characterized in that: the cleaning device is characterized in that a rotary thread (501) is arranged at the center of the cleaning device (5), the rotary thread (501) is meshed with a vertical threaded rod (406), air cavities (505) are arranged at the left end, the right end, the upper end and the lower end of the cleaning device (5), an air outlet (511) is arranged at the outer side of the air cavity (505), rotating wheels (502) are connected to bearings at the two ends of the cleaning device (5), a rotating wheel shaft (503) is fixedly connected to the axle center of the rotating wheel (502), a rotating wheel shaft threaded port (504) is arranged on the rotating wheel shaft (503), a transmission shaft is meshed with the rotating wheel shaft threaded port (504), the transmission shaft extends into the air cavity (505), an air cavity wheel (506) is connected to the inner side of the air cavity (505) through a bearing, an air cavity wheel threaded shaft (507) is arranged at the center of the air cavity wheel (506), and, the air cavity wheel (506) is fixedly connected with a movable shaft (508), a top bearing of the movable shaft (508) is connected with a push-pull rod (509), one end of the push-pull rod (509) is connected with the top bearing of the movable shaft (508), and the other end of the push-pull rod is fixedly connected with an air plug (510).