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75 MVA transformer capable of realizing pressure relief and explosion prevention

A technology for transformers and pressure sensors, applied in transformer/inductor casings, transformer/inductor cooling, instruments, etc., can solve problems such as fuel injection or fuel tank bursts, prevent secondary accidents, simplify design, and improve explosion-proof performance Effect

Inactive Publication Date: 2015-12-23
夏烬楚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, as the internal pressure continues to increase, when the pressure exceeds the mechanical strength of the fuel tank, fuel injection or fuel tank burst will occur

Method used

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  • 75 MVA transformer capable of realizing pressure relief and explosion prevention

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Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0049] A pressure relief and explosion-proof 75MVA transformer of the present invention includes a fire extinguishing mechanism 3 connected to the transformer 1, a pressure release mechanism 4, a leak detection mechanism and a control mechanism;

[0050] Transformer 1, including shell, oil conservator 2, iron core, winding; oil conservator 2 is arranged on the upper end of the shell, and is connected with the shell through a pipeline, and the pipeline is provided with a gas relay and a shut-off valve; three-phase winding It is installed in the housing, and the winding is wrapped with an iron core. A temperature sensor is installed at the upper, middle and lower positions of the three-phase winding; a pressure sensor is respectively installed at the upper, middle and lower parts of the housing;

[0051] The fire extinguishing mechanism 3 includes a fire extinguishing box, a fire extinguishing tank, and a gas booster pump; the fire extinguishing tank is arranged in the fire extin...

specific Embodiment 2

[0064] Transformer 1 unit, including shell, oil conservator 2, iron core, winding; oil conservator 2 is fixed on the top of the shell and connected to the shell through the gas relay and shut-off valve; the three-phase winding is set in the shell, each winding Wrapped with an iron core, a temperature sensor is installed at the upper, middle and lower positions of each winding; a pressure sensor is respectively installed at the upper, middle and lower parts of the casing to detect the oil temperature or gas temperature in the casing; the transformer There is a basement under 1;

[0065] The pressure release unit includes an oil discharge tank, an oil discharge pool, an oil discharge pump, an igniter, and a pressure release valve; the oil discharge tank is located in the basement below the transformer 1, and there is a solenoid valve on the middle and lower outside of the transformer 1 housing, The two solenoid valves are connected in parallel to the oil discharge tank; there is...

specific Embodiment 3

[0075] (3) When the pressure inside the transformer 1 is greater than 61kpa, the controller controls the solenoid valve connected to the oil discharge tank in the middle of the transformer 1 to open to transfer the transformer 1 oil to the oil discharge tank;

[0076] (4) When the pressure inside the transformer 1 is greater than 70kpa, the controller controls the solenoid valve connected to the oil discharge tank at the lower part of the transformer 1 to open;

[0077] (5) When the pressure in the oil discharge tank is greater than 55kpa, the safety valve at the lower end of the oil discharge tank is opened;

[0078] (6) When the pressure inside the transformer 1 drops to 55kpa, the control unit controls the solenoid valve of the pipeline connected to the oil discharge tank on the transformer 1 to close;

[0079] (7) The airflow is detected at the exhaust port, and the control unit controls the igniter to ignite.

[0080] Due to the above method, the pressure can be effectiv...

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Abstract

The invention discloses a 75 MVA transformer capable of realizing pressure relief and explosion prevention. The transformer comprises a fire extinguishing mechanism connected onto the transformer, a pressure relief mechanism, a leakage detection mechanism and a control mechanism; a system of the transformer comprises a control unit as well as a purification unit, a leakage detection unit, a fire extinguishing unit, a pressure relief unit and a transformer unit which are controlled by the control unit in a unified manner. The transformer has the benefits as follows: explosions of the transformer can be effectively prevented, personal and property safety can be guaranteed, all positions of a winding can be monitored by the aid of the structure, and timely early-warning and explosion prevention actions can be realized in case of short-circuits. A short-circuited part can be cooled in a targeted manner, meanwhile, fire-extinguishing gas is evenly sprayed to the top of the transformer, the explosion prevention means is enhanced, pressure of the transformer can be relived timely, and waste of transformer oil can be avoided. All sensors of the transformer are made of special materials, have higher sensitivity, and can effectively prevent misoperation or false alarms of the transformer.

Description

technical field [0001] The invention relates to a pressure discharge and explosion-proof 75MVA transformer. Background technique [0002] With the development of science and technology, the voltage level of transformers is getting higher and higher, and the capacity is getting bigger and bigger. A little carelessness can easily lead to major accidents. The safety and reliability of power supply is even more important. Known as active explosion-proof, fire-proof and fire-extinguishing equipment, it is the loyal guard of oil-immersed transformers. It will be more widely used in substations and power stations, and will make greater contributions to the safe production of power plants and substations across the country. The 75MVA oil-immersed transformer is one of the main application power equipment in power plants and substations. The long-term overload operation of the transformer and the cracking and corrosion of the insulating oil will cause the aging and deterioration of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/40H01F27/02A62C3/16G05F1/14H01F27/14B03C1/30
Inventor 夏烬楚
Owner 夏烬楚
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