CN111029100A

CN111029100A - Oil-immersed transformer

Info

Publication number: CN111029100A
Application number: CN202010001796.8A
Authority: CN
Inventors: 葛灿灿; 葛童童; 葛立
Original assignee: Ji Neng Electric Co Ltd
Current assignee: Ji Neng Electric Co Ltd
Priority date: 2020-01-02
Filing date: 2020-01-02
Publication date: 2020-04-17

Abstract

The invention discloses an oil-immersed transformer which comprises a shell, an oil tank, a temperature sensor and a controller, wherein a cylinder body is fixedly connected inside the shell, a hollow pipe is arranged inside the cylinder body, and helical blades are welded on the outer surface wall of the hollow pipe. In the invention, the output shaft of the first motor is provided with the driving gear, the upper end of the shell is provided with the oil tank and the circulating pump, the cooling pipe is arranged between the driving gear and the oil tank, and the cooling pipe is provided with the radiating fins, so that the design has the advantages that: when the transformer works, the first motor drives the driving gear to rotate, so that the driven gear is rotated, the driven gear can further drive the hollow tube and the spiral blade to rotate, the spiral blade can promote transformer oil to flow, the transformer oil is circulated and flows by matching with the circulating pump, so that the heat exchange efficiency of the transformer oil is improved, and meanwhile, when the transformer oil flows through the cooling tube, heat can be transferred through the heat dissipation fins, so that the heat dissipation performance is improved.

Description

Oil-immersed transformer

Technical Field

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

Background

The oil immersed transformer is a novel high-performance transformer with more reasonable structure and better performance, and the three-dimensional wound iron core has no air gap in a magnetic circuit because three core columns are arranged in a three-dimensional manner in an equilateral triangle, so that the winding is tighter, the three magnetic circuits are consistent in length and shortest, and the cross sectional area of the core columns of the iron core is closer to a circle, so that the performance is further improved, the loss is reduced, the noise is reduced, the three-phase balance is realized, the third harmonic component is reduced, and the product is more suitable for urban and rural power, the transformation of power grids of industrial and mining enterprises, and is more suitable for combined transformers and transformers for pre-installed.

The existing oil-immersed transformer still has defects in use, transformer oil in the existing oil-immersed transformer is insufficient in fluidity, and the transformer oil cannot be rapidly circulated in time when being cooled, so that the transformer oil cannot be rapidly cooled, and the transformer still has the problem of overheating after being operated for a long time.

Disclosure of Invention

The invention aims to solve the problem that the existing oil-immersed transformer is insufficient in cooling performance, and provides an oil-immersed transformer.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an oil-immersed transformer, includes casing, oil tank, temperature sensor and controller, the inside fixedly connected with barrel of casing, the inside of barrel is equipped with the hollow tube, the exterior wall welding of hollow tube has helical blade to driven gear has been cup jointed to the one end of hollow tube, the outside terminal surface bolted connection who is close to driven gear of barrel has first motor, the output shaft of first motor rotates and is connected with drive gear, driven gear and drive gear meshing are connected, the top bolted connection of casing has the circulating pump, the circulating pump all communicates with barrel and oil tank, barrel and oil tank intercommunication.

As a further description of the above technical solution:

one end of the hollow pipe, which is far away from the driven gear, is rotatably connected with a bearing sleeve, and the hollow pipe is fixedly connected with the bearing sleeve.

As a further description of the above technical solution:

the end face of one side, provided with the oil tank, of the shell is communicated with a ventilation pipe, a second motor is fixedly connected inside the ventilation pipe, and an output shaft of the second motor is rotatably connected with fan blades.

As a further description of the above technical solution:

the water pump is characterized in that an annular water pipe is fixedly connected to one side, provided with a ventilation pipe, of the shell, the outer wall of the water pipe is communicated with a plurality of nozzles which are arranged circumferentially, a water tank is fixedly connected to the top of the ventilation pipe, a water pump is arranged at the bottom of the water tank, and the water pump is communicated with the water tank and the water pipe.

As a further description of the above technical solution:

the first motor, the circulating pump, the second motor, the temperature sensor and the water pump are all electrically connected with the controller.

As a further description of the above technical solution:

the oil tank is communicated with the circulating pump through a cooling pipe, and radiating fins are embedded in the outer surface walls of the barrel body and the cooling pipe.

As a further description of the above technical solution:

and filter screens are embedded in the end faces, far away from each other, of the shell and the ventilation pipe.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. according to the invention, the barrel is arranged in the shell, the hollow tube is arranged in the barrel, the helical blades are arranged on the outer side of the hollow tube, the driven gear is arranged at one end of the hollow tube, the first motor is arranged at one end of the barrel, the driving gear is arranged on the output shaft of the first motor, the oil tank and the circulating pump are arranged at the upper end of the shell, the cooling tube is arranged between the oil tank and the circulating pump, the cooling tube is provided with the radiating fins, and the design is adopted, so that the heat-radiating fin cooling device has: when the transformer works, the first motor drives the driving gear to rotate, so that the driven gear is rotated, the driven gear can further drive the hollow tube and the spiral blade to rotate, the spiral blade can promote transformer oil to flow, the transformer oil is circulated and flows by matching with the circulating pump, so that the heat exchange efficiency of the transformer oil is improved, and meanwhile, when the transformer oil flows through the cooling tube, heat can be transferred through the heat dissipation fins, so that the heat dissipation performance is improved.

2. According to the invention, the ventilation pipe is arranged on one side of the shell, the second motor is arranged in the ventilation pipe, the fan blades are arranged on the output shaft of the second motor, the water pipe is arranged in the shell, the nozzle is arranged on the water pipe, the water tank is arranged on the ventilation pipe, and the heat radiating fins are arranged on the cylinder body, so that the design has the advantages that: the second motor drives the fan blades to rotate, so that air flow inside the shell can be improved, meanwhile, the water in the water tank is fed into the water inlet pipe by the water pump, water mist sprayed out of the nozzles is blown onto the whole body and the radiating fins on the surface of the whole body through the air flow, and then the cylinder body is radiated through evaporation of the water.

3. In the invention, the temperature sensor is arranged in the shell, the controller is arranged on the ventilation pipe, and the design has the advantages that: the controllable motor of controller and pump start-up, but and then make equipment automatic operation to through the real-time detection of cooperation temperature sensor, carry out rapid cooling when the transformer temperature is too high.

Drawings

FIG. 1 is a schematic view of the internal structure of the housing according to the present invention;

FIG. 2 is a schematic view of the inner end face structure of the cylinder body in the present invention;

FIG. 3 is a schematic view of the connection structure of the water pipe and the nozzle in the present invention;

FIG. 4 is a schematic view of a connection structure of a driving gear and a driven gear in the present invention;

fig. 5 is a schematic end view of a cooling pipe according to the present invention.

Illustration of the drawings:

1. a housing; 2. a barrel; 3. an oil tank; 4. a hollow tube; 5. a helical blade; 6. a driven gear; 7. a first motor; 8. a drive gear; 9. a circulation pump; 10. a bearing housing; 11. a heat dissipating fin; 12. a vent pipe; 13. a second motor; 14. a fan blade; 15. a water tank; 16. a water pipe; 17. a nozzle; 18. a filter screen; 19. a temperature sensor; 20. a controller; 21. a cooling tube; 22. and (4) a water pump.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

referring to fig. 1, 2, 4 and 5, an oil-immersed transformer includes a housing 1, an oil tank 3, a temperature sensor 19 and a controller 20, wherein a cylinder 2 is fixedly connected to the inside of the housing 1, a hollow tube 4 is arranged inside the cylinder 2, a helical blade 5 is welded to the outer surface wall of the hollow tube 4, a driven gear 6 is sleeved at one end of the hollow tube 4, a first motor 7 is bolted to the end surface of the outside of the cylinder 2 close to the driven gear 6, an output shaft of the first motor 7 is rotatably connected with a driving gear 8, the driven gear 6 is meshed with the driving gear 8, a circulating pump 9 is bolted to the top of the housing 1, the circulating pump 9 is communicated with both the cylinder 2 and the oil tank 3, the cylinder 2 is communicated with the oil tank 3, a bearing sleeve 10 is rotatably connected to one end of the hollow tube 4 far from the driven gear 6, the hollow tube 4 is fixedly, Circulating pump 9, temperature sensor 19 all are connected with controller 20 electricity, and oil tank 3 communicates through cooling tube 21 with circulating pump 9, and barrel 2 and cooling tube 21's outer table wall all inlays and is equipped with radiating fin 11, and first motor 7 starts to drive gear 8 rotatory, and then makes hollow tube 4 and helical blade 5 rotatory through driven gear 6 to it flows to drive transformer oil through helical blade 5.

Example two:

referring to fig. 1-5, an oil-immersed transformer includes a housing 1, an oil tank 3, a temperature sensor 19 and a controller 20, wherein a cylinder 2 is fixedly connected to the inside of the housing 1, a hollow tube 4 is disposed inside the cylinder 2, a helical blade 5 is welded to an outer surface wall of the hollow tube 4, a driven gear 6 is sleeved at one end of the hollow tube 4, a first motor 7 is bolted to an end surface of the outside of the cylinder 2 close to the driven gear 6, a driving gear 8 is rotatably connected to an output shaft of the first motor 7, the driven gear 6 is meshed with the driving gear 8, a circulating pump 9 is bolted to the top of the housing 1, the circulating pump 9 is communicated with the cylinder 2 and the oil tank 3, the cylinder 2 is communicated with the oil tank 3, a bearing housing 10 is rotatably connected to one end of the hollow tube 4 far from the driven gear 6, the hollow tube 4 is fixedly connected, The second motor 13 and the water pump 22 of the temperature sensor 19 are electrically connected with the controller 20, the oil tank 3 is communicated with the circulating pump 9 through a cooling pipe 21, the outer surface walls of the cylinder 2 and the cooling pipe 21 are respectively embedded with a radiating fin 11, the end surface of the shell 1 at the side provided with the oil tank 3 is communicated with a ventilating pipe 12, the interior of the ventilating pipe 12 is fixedly connected with the second motor 13, an output shaft of the second motor 13 is rotatably connected with a fan blade 14, one side of the shell 1 at the side provided with the ventilating pipe 12 is fixedly connected with an annular water pipe 16, the outer surface wall of the water pipe 16 is communicated with a plurality of nozzles 17 arranged circumferentially, the top of the ventilating pipe 12 is fixedly connected with a water tank 15, the bottom of the water tank 15 is provided with the water pump 22, the water pump 22 is communicated with the water tank 15 and the water pipe 16, the end surfaces of the shell 1 and the ventilating pipe 12 which are far away from each other, thereby promoting heat dissipation from the cylinder 2.

The working principle is as follows: when the transformer oil circulation cooling device is used, commercial power is supplied to electrical equipment on an oil-immersed transformer, firstly, when the transformer runs, the controller 20 starts the first motor 7 and the circulating pump 9, the first motor 7 drives the driving gear 8 to rotate, and then drives the driven gear 6 to rotate, as the plurality of three driven gears 6 are transmitted through the driving gear 8, the three driven gears 6 are enabled to rotate in the same direction, the driven gear 6 can drive the hollow pipe 4 to rotate, and further the helical blade 5 is enabled to rotate, so that transformer oil is driven to flow, and meanwhile, the transformer oil is pumped into the cooling pipe 21 through the circulating pump 9 and is sent into the oil tank 3 to be enabled to flow circularly, and when the transformer oil passes through the cooling pipe 21, the heat can be dissipated; secondly, the temperature sensor 19 can detect the temperature inside the casing 1 in real time and feed back the temperature to the controller 20 when the transformer operates, when the temperature exceeds a threshold value, the controller 20 starts the second motor 13 and the water pump 22, the second motor 13 drives the fan blades 14 to rotate, the fan blades 14 can draw air into the casing 1 from the outside, the water pump 22 can send water into the water pipe 16 and spray the water from the nozzle 17, the sprayed water mist falls on the barrel 2 and the radiating fins 11 on the outer wall of the barrel through air flow generated by the fan blades 14, the temperature on the surface of the barrel 2 is taken away through evaporation of the water, and then the heat dissipation of the barrel 2 is promoted, and through the steps, the heat dissipation performance of the transformer is improved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. An oil-immersed transformer comprises a shell (1), an oil tank (3), a temperature sensor (19) and a controller (20), and is characterized in that a barrel (2) is fixedly connected to the inside of the shell (1), a hollow tube (4) is arranged inside the barrel (2), a spiral blade (5) is welded on the outer surface wall of the hollow tube (4), a driven gear (6) is sleeved at one end of the hollow tube (4), a first motor (7) is connected to the outer portion of the barrel (2) close to the end face of the driven gear (6) through a bolt, a driving gear (8) is connected to the output shaft of the first motor (7) in a rotating mode, the driven gear (6) is connected with the driving gear (8) in a meshing mode, a circulating pump (9) is connected to the top of the shell (1) through a bolt, and the circulating pump (9) is communicated with the barrel (2) and, the cylinder (2) is communicated with the oil tank (3).

2. The oil-immersed transformer according to claim 1, characterized in that a bearing sleeve (10) is rotatably connected to one end of the hollow tube (4) far away from the driven gear (6), and the hollow tube (4) is fixedly connected with the bearing sleeve (10).

3. An oil-filled transformer according to claim 1, characterized in that the end surface of the housing (1) on the side provided with the oil tank (3) is communicated with a ventilation pipe (12), a second motor (13) is fixedly connected inside the ventilation pipe (12), and an output shaft of the second motor (13) is rotatably connected with fan blades (14).

4. An oil-filled transformer according to claim 3, characterized in that an annular water pipe (16) is fixedly connected to one side of the housing (1) provided with the ventilation pipe (12), the outer wall of the water pipe (16) is communicated with a plurality of nozzles (17) arranged circumferentially, a water tank (15) is fixedly connected to the top of the ventilation pipe (12), a water pump (22) is arranged at the bottom of the water tank (15), and the water pump (22) is communicated with both the water tank (15) and the water pipe (16).

5. Oil filled transformer according to claim 4, characterized in that the first motor (7), the circulation pump (9), the second motor (13), the temperature sensor (19) and the water pump (22) are all electrically connected to a controller (20).

6. Oil-filled transformer according to claim 1, characterized in that the oil tank (3) is in communication with the circulating pump (9) via a cooling pipe (21), and the outer surface walls of the cylinder (2) and the cooling pipe (21) are embedded with heat dissipating fins (11).

7. An oil-filled transformer according to claim 3, characterized in that the filter screen (18) is embedded in the end faces of the housing (1) and the ventilation pipe (12) that are far away from each other.