Device for replacing interface flange sealing ring of main transformer with oil

Abstract

The invention relates to a device for replacing an interface flange sealing ring of a main transformer with oil. The device comprises a main transformer body, an oil conservator, a vacuumizing three-way valve, a dynamic vacuum system, transformer oil arranged in the main transformer body, a main connecting pipe arranged on the lower portion of the main transformer body and an oil drain valve, wherein the oil conservator is connected to the top of the main transformer body through a communication valve and a gas relay; and the vacuumizing three-way valve is arranged at the top of the main transformer body and is connected with the dynamic vacuum system. The device further comprises an oil level sensor, wherein the oil level sensor comprises an extension rod with electric contacts at two ends, and the electric contacts at the two ends of the extension rod are respectively an initial end electric contact and a tail end electric contact. According to the invention, when a main transformerconnecting pipe and a valve are damaged, leak and need to be treated or a sealing element needs to be replaced, oil flow at an opened pipe orifice or a connector can retract and cannot flow out in a short time, thereby ensuring the work of workers to be smoothly completed, and also being capable of avoiding the risk that external air is sucked into the main transformer due to excessive vacuum pumping.

Description

technical field [0001] The invention relates to a main transformer oil replacement interface flange sealing ring device. Background technique [0002] During the operation of the main transformer, its outer casing, valves, etc. may be damaged, and its internal rubber sealing ring will also be aged, cracked or damaged during long-term use, resulting in oil leakage from the damaged part of the main transformer. The traditional treatment method for damage is to tighten the fastening bolts, but when there is no compression, there will still be leakage, and when the valve is damaged, the only way is to discharge the transformer oil in the main transformer to the height where the seal ring or damaged valve needs to be treated In the following positions, open the nozzle blanking plate, or remove the flanges and valves, replace the sealing rings and valves, and return the transformer oil to the main transformer after the replacement. At the bottom, a large amount of oil needs to be...

AI Technical Summary

Problems solved by technology

[0002] During the operation of the main transformer, its outer casing, valves, etc. may be damaged, and its internal rubber sealing ring will also be aged, cracked or damaged during long-term use, resulting in oil leakage from the damaged part of the main transformer. The traditional treatment method for damage is to tighten the fastening bolts, but when there is no compression, there will still be leakage, and when the valve is damaged, the only way is to discharge the transformer oil in the main transformer to the height where the seal ring or damaged valve needs to be treated In the following positions, open the nozzle blanking plate, or remove the flanges and valves, replace the sealing rings and valves, and return the transformer oil to the main transformer after the replacement. At the bottom, a large amount of oil needs to be discharged to process, which will cause a long power outage of the main transformer, and it is necessary to prepare to transfer the oil tanks and cranes containing the discharged oil. The workload is huge, and a large amount of transformer oil is discharged and transferred. hidden dangers, as well as waste and environmental pollution caused by running, emitting, dripping and leaking, there is an urgent need for a method that can carry out oil maintenance of the main transformer without putting a large amount of oil on the pipe interface flange, valve and replacement of the sealing ring.

Images