Vacuum oil injection system for transformer or capacitor

Abstract

The invention relates to a vacuum oil injection system for a transformer or a capacitor. The vacuum oil injection system comprises a towing vehicle and a vacuum oil injection device. The vacuum oil injection device comprises an oil-level controller, an oil storage tank, a buffering tank and a vacuum tank; the oil storage tank supplements oil into the buffering tank, and relying on the liquid level difference, the buffering tank automatically injects oil into the transformer or the capacitor; the oil-level controller controls the oil storage tank to stop to supplement oil when the oil level in the buffering tank is located on the upper set liquid level, and controls the oil storage tank to start to supplement oil when the oil level in the buffering tank is located on the lower set liquid level, an oil injection soaking pipe communicated with the vacuum tank is installed on an oil injection opening of the transformer or the capacitor, and the maximum liquid level permitted in the oil injection soaking pipe is slightly higher than the upper set liquid level; the towing vehicle comprises a vehicle head and a vehicle body detachably connected with the vehicle head, and the vehicle head is engaged with chain rails installed outside the vacuum tank through transmission chain wheels for achieving reciprocating motion of the towing vehicle. By means of the vacuum oil injection system for the transformer or the capacitor, automatic oil supplementing and automatic oil injection of the transformer or the capacitor are achieved, and the towing vehicle is high in transmission efficiency and long in service life.

Description

technical field [0001] The invention relates to a transformer or capacitor vacuum oiling system. Background technique [0002] Vacuum oil filling is an effective measure to improve the insulation strength of transformers or capacitors. In order to maximize the penetration of insulating oil into the gaps in the internal components of transformers or capacitors and ensure that the amount of insulating oil inside the product is sufficient, the transformer or capacitor after oiling The height of the inner oil level must be accurate. The traditional oil filling method is: "immersion oil filling", that is, place a large storage tank in the vacuum tank, put the transformer or capacitor in the storage tank, put the insulating medium oil into the storage tank during oil filling, and let the transformer or capacitor Capacitors are filled with oil and impregnated in a storage tank filled with insulating medium oil. The other is "oil tank type oil injection". The upper layer uses an o...

AI Technical Summary

Problems solved by technology

The other is "oil tank type oil injection". The upper layer uses an oil injection tank and the lower layer uses an oil collection tank, which will cause a great waste of transformer or capacitor oil, and will also pollute the insulating oil injected into the capacitor.

The problem brought by the traditional oil filling method is that each oil injection requires a lot of insulating medium oil, which greatly increases the workload of oil treatment, and the insulating medium oil is prone to spilling when the tank is assembled, causing serious environmental pollution, especially Dirt on the outer surface of the capacitor and the inner wall of the load-bearing equipment is easy to enter the transformer or capacitor when the insulating medium is filled with oil, which will reduce the withstand voltage value of the transformer or capacitor film at high voltage, and seriously affect the internal quality and service life of the transformer or capacitor.

The problem existing in the use of the tractor: the transformer or capacitor and the transmission parts (chain) of the tractor are all in the vacuum tank during the oil filling process. Although the chain can ensure a more accurate transmission ratio, it does not take into account the vacuum tank. Due to the high temperature conditions and the influence of the environment on the insulating oil, due to the process requirements, the vacuum container needs to be heated to 160-170°C before being used, then vacuumized, and kerosene is sprayed. The kerosene is heated and evaporated in a vacuum state to become High-temperature kerosene vapor, chain lubricating oil is polluted by organic solvent kerosene vapor at high temperature, the viscosity decreases, and the lubricating effect drops sharply

Due to temperature and medium corrosion, the worn chain pitch will increase, the speed of chain transmission will decrease, and the service life of chain materials will also be greatly reduced.

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