CN212303352U

CN212303352U - Explosion-proof oil-immersed transformer

Info

Publication number: CN212303352U
Application number: CN202021519046.1U
Authority: CN
Inventors: 张智程; 陈宝峰; 胡寅; 罗诗颖; 施宇铮; 李秋平
Original assignee: Kunming University of Science and Technology
Current assignee: Kunming University of Science and Technology
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-01-05
Anticipated expiration: 2030-07-28

Abstract

The utility model discloses an explosion-proof oil-immersed transformer, which comprises a transformer main body and a controller, wherein a partial discharge monitor and a temperature sensor are fixedly arranged at the top end of the transformer main body, the detection end of the temperature sensor extends into the insulating oil in the transformer main body, a plurality of radiating fins which are uniformly distributed are arranged on the front end surface and the rear end surface of the transformer main body, and radiating fans are arranged at the two ends of the radiating fins; the bottom of the transformer main body is fixedly provided with an explosion-proof oil tank, one side of the transformer main body is communicated with the explosion-proof oil tank through an oil discharge pipe, and the other side of the transformer main body is communicated with the explosion-proof oil tank through an oil return pipe; the utility model discloses be provided with partial discharge monitor and temperature sensor, can carry out temperature and discharge monitoring in to the transformer, be provided with heat dissipation mechanism and oil extraction explosion-proof mechanism simultaneously, when monitoring the transformer in the high temperature or have the partial discharge phenomenon, can in time be the transformer heat dissipation or the oil extraction explosion-proof, prevent that transformer insulating oil from receiving high temperature or electric arc effect to explode.

Description

Explosion-proof oil-immersed transformer

Technical Field

The utility model relates to a transformer especially relates to an explosion-proof type oil-immersed transformer.

Background

The transformer is an electric power device which converts alternating current energy into parameters of different voltages, currents and the like by utilizing the principle of electromagnetic induction. The oil immersed transformer immerses the iron core and the winding into an oil tank filled with insulating oil together to strengthen insulation and improve cooling and heat dissipation conditions. When faults such as serious overload, short circuit, insulation damage and the like occur in the transformer, the insulating oil is subjected to high temperature or electric arc action and is heated and decomposed to generate a large amount of hydrocarbon mixed gas, so that the pressure in the transformer is increased rapidly, the structure of a transformer oil tank is damaged, and the primary transformer explodes.

After the primary transformer explodes, the insulating oil, the mixed gas and the oil mist are violently released outwards through a rupture port of a transformer oil tank. The insulating oil leaks from the transformer, forms a liquid pool on the ground, and is ignited to generate pool fire. And when the leaked pyrolysis product mixed gas and oil mist are mixed with air and then ignited, secondary explosion can occur. When these conditions occur in confined or congested areas, they can cause very intense explosions and pose a threat to personnel and equipment, with serious socioeconomic losses.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of prior art, the utility model provides an explosion-proof type oil-immersed transformer can carry out temperature and discharge monitoring to the transformer, prevents that transformer insulating oil from receiving high temperature or electric arc effect to explode.

In order to solve the technical problem, the utility model provides a following technical scheme:

an explosion-proof oil-immersed transformer comprises a transformer main body and a controller, wherein a partial discharge monitor and a temperature sensor are fixedly mounted at the top end of the transformer main body, detection end heads of the temperature sensor extend into insulating oil in the transformer main body, a plurality of uniformly distributed heat dissipation fins are arranged on the front end surface and the rear end surface of the transformer main body, and heat dissipation fans are mounted at the two ends of each heat dissipation fin; the transformer comprises a transformer main body, an explosion-proof oil tank, an oil return pipe, an electromagnetic valve, a hydraulic pump, a first electromagnetic valve, a second hydraulic pump and a third hydraulic pump, wherein the explosion-proof oil tank is fixedly installed at the bottom of the transformer main body, one side of the transformer main body is communicated with the explosion-proof oil tank through the oil discharge pipe, the other side of the transformer main body is communicated with the explosion-proof oil tank through the oil return; the partial discharge monitoring instrument and the temperature sensor are in signal connection with the controller, and the controller is in electric control connection with the cooling fan, the first electromagnetic valve, the first hydraulic pump, the second electromagnetic valve and the second hydraulic pump respectively.

As an optimal technical scheme of the utility model, level sensor with controller signal connection is installed at the top of transformer main part, level sensor's detection end all extends to in the inside insulating oil of transformer main part.

As an optimized technical scheme of the utility model, the controller is stm32 single chip microcomputer controller, the partial discharge monitor is YTC9000 infrared partial discharge detector, temperature sensor is TD-6112-sand 7000 temperature sensor, level sensor is SZ-UQS magnetostrictive level meter.

As an optimized technical scheme of the utility model, the controller still with install the automatically controlled connection of circuit breaker in transformer circuit.

As an optimized technical scheme of the utility model, the lug is all installed to the both sides at transformer main part top.

Compared with the prior art, the utility model discloses the beneficial effect that can reach is:

the utility model discloses be provided with partial discharge monitor and temperature sensor, can carry out temperature and discharge monitoring in to the transformer, be provided with heat dissipation mechanism and oil extraction explosion-proof mechanism simultaneously, when monitoring the transformer in the high temperature or have the partial discharge phenomenon, can in time be the transformer heat dissipation or the oil extraction explosion-proof, prevent that transformer insulating oil from receiving high temperature or electric arc effect to explode.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a block schematic diagram of the present invention;

wherein: 1. a transformer body; 2. a partial discharge monitor; 3. a temperature sensor; 4. a liquid level sensor; 5. heat dissipation fins; 6. a heat radiation fan; 7. an explosion-proof oil tank; 8. an oil discharge pipe; 9. a first electromagnetic valve; 10. a first hydraulic pump; 11. an oil return pipe; 12. a second electromagnetic valve; 13. a second hydraulic pump; 14. a controller; 15. a circuit breaker.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Referring to fig. 1-2, an explosion-proof oil-immersed transformer includes a transformer main body 1 and a controller 14, a partial discharge monitor 2 and a temperature sensor 3 are fixedly installed at the top end of the transformer main body 1, detection ends of the temperature sensor 3 extend into insulating oil inside the transformer main body 1, a plurality of uniformly distributed heat dissipation fins 5 are arranged on front and rear end surfaces of the transformer main body 1, and heat dissipation fans 6 are installed at two ends of the heat dissipation fins 5; the bottom of the transformer main body 1 is fixedly provided with an explosion-proof oil tank 7, one side of the transformer main body 1 is communicated with the explosion-proof oil tank 7 through an oil discharge pipe 8, the other side of the transformer main body 1 is communicated with the explosion-proof oil tank 7 through an oil return pipe 11, a first electromagnetic valve 9 and a first hydraulic pump 10 are arranged on the oil discharge pipe 8, and a second electromagnetic valve 12 and a second hydraulic pump 13 are arranged on the oil return pipe 11; the partial discharge monitor 2 and the temperature sensor 3 are in signal connection with a controller 14, and the controller 14 is in electric control connection with the cooling fan 6, the first electromagnetic valve 9, the first hydraulic pump 10, the second electromagnetic valve 12 and the second hydraulic pump 13 respectively.

Level sensor 4 with 14 signal connection of controller is installed at the top of transformer main part 1, and level sensor 4's detection end all extends to in the insulating oil of transformer main part 1 inside, and level sensor 4 detectable transformer main part 1 inside insulating oil's liquid level makes things convenient for oil extraction and oil return.

The controller 14 is an stm32 single-chip microcomputer controller, the partial discharge monitor 2 is a YTC9000 infrared partial discharge detector, the temperature sensor 3 is a TD-6112-7000 temperature sensor, and the liquid level sensor 4 is an SZ-UQS magnetostrictive liquid level meter.

The controller 14 is also electrically connected with a circuit breaker 15 installed in a transformer circuit, and when the temperature in the transformer is too high and cannot be timely reduced or partial discharge is generated by electric arcs, the controller 14 controls the circuit breaker 15 to be disconnected, so that the transformer is powered off and shut down, and the transformer is prevented from explosion.

The lugs are arranged on two sides of the top of the transformer body 1, and the transformer is convenient to hoist.

Specifically, when the transformer works, the local discharge monitor 2 and the temperature sensor 3 monitor the temperature and discharge in the transformer and transmit monitoring information to the controller 14, the transformer is subjected to auxiliary heat dissipation by the heat dissipation fins 5 at ordinary times, when the temperature in the transformer is monitored to be high and the heat dissipation efficiency of the heat dissipation fins 5 alone is insufficient, the controller 14 controls the heat dissipation fan 6 to be turned on, the heat dissipation fins 5 are matched for heat dissipation and temperature reduction of the transformer, high-temperature explosion is prevented, if the temperature in the transformer is too high and the heat dissipation and temperature reduction cannot be carried out in time, the controller 14 controls the breaker 15 to be turned off, the transformer is powered off and shut down, and the transformer is; when the partial discharge monitor 2 monitors that electric arcs are generated in the transformer to generate partial discharge, the controller 14 controls the breaker 15 to be switched off to prevent the voltage transformer from continuously working and the electric arcs from continuously generating to cause explosion of the transformer, and meanwhile, the first electromagnetic valve 9 and the first hydraulic pump 10 are switched on to transfer insulating oil in the transformer to the interior of the explosion-proof oil tank 7 through the oil discharge pipe 8, so that most of the insulating oil can be transferred to prevent leakage of the insulating oil and secondary explosion even if the transformer is subjected to primary explosion; if the worker rechecks after the insulating oil is transferred and does not explode, the second electromagnetic valve 12 and the second hydraulic pump 13 can be opened, the hydraulic oil is led back to the transformer again through the oil return pipe 11, and the transformer can be conveniently restarted to work.

The embodiments of the present invention are not limited to the above embodiments, and according to the contents of the above embodiments of the present invention, the above preferred embodiments can also make modifications, replacements or combinations of other forms by using conventional technical knowledge and conventional means in the field without departing from the basic technical idea of the present invention, and the obtained other embodiments all fall within the scope of the present invention.

Claims

1. An explosion-proof oil-immersed transformer comprises a transformer main body (1) and a controller (14), and is characterized in that a partial discharge monitor (2) and a temperature sensor (3) are fixedly mounted at the top end of the transformer main body (1), detection ends of the temperature sensor (3) extend into insulating oil in the transformer main body (1), a plurality of uniformly distributed heat dissipation fins (5) are arranged on the front end surface and the rear end surface of the transformer main body (1), and heat dissipation fans (6) are mounted at the two ends of each heat dissipation fin (5); an explosion-proof oil tank (7) is fixedly mounted at the bottom of the transformer main body (1), one side of the transformer main body (1) is communicated with the explosion-proof oil tank (7) through an oil discharge pipe (8), the other side of the transformer main body is communicated with the explosion-proof oil tank (7) through an oil return pipe (11), a first electromagnetic valve (9) and a first hydraulic pump (10) are mounted on the oil discharge pipe (8), and a second electromagnetic valve (12) and a second hydraulic pump (13) are mounted on the oil return pipe (11); partial discharge monitor (2) and temperature sensor (3) all with controller (14) signal connection, controller (14) are connected with radiator fan (6), solenoid valve (9), hydraulic pump (10), No. two solenoid valves (12) and No. two hydraulic pump (13) automatically controlled respectively.

2. An explosion-proof oil-filled transformer according to claim 1, characterized in that a liquid level sensor (4) connected with a controller (14) through signals is installed on the top of the transformer body (1), and detection ends of the liquid level sensor (4) extend into insulating oil inside the transformer body (1).

3. The explosion-proof oil-immersed transformer according to claim 2, wherein the controller (14) is stm32 single-chip microcomputer controller, the partial discharge monitor (2) is YTC9000 infrared partial discharge detector, the temperature sensor (3) is TD-6112-7000 temperature sensor, and the liquid level sensor (4) is SZ-UQS magnetostrictive liquid level meter.

4. An explosion proof oil filled transformer according to claim 1, characterized in that the controller (14) is also electrically connected to a breaker (15) installed in the transformer circuit.

5. An explosion-proof oil-filled transformer according to claim 1, characterized in that lifting lugs are installed on both sides of the top of the transformer body (1).