Evaporated liquor flooded type phase-change heat transfer device for oil-immersed transformer

Abstract

The invention discloses an evaporated liquor flooded type phase-change heat transfer device for an oil-immersed transformer and belongs to the technical field of electric power supply and distribution facilities. The device comprises a main oil inlet pipe, a main oil return pipe and at least one evaporator, wherein each evaporator comprises a tank body, an evaporating pipe, an upper partition board and a lower partition board. The device is characterized by further comprising a cooling liquid storage tank used for storing cooling liquid, the cooling liquid storage tank is matched with the evaporators, a cooling liquid inlet port communicated with a cavity of the cooling liquid storage tank is formed in the top or the upper lateral portion of the cooling liquid storage tank, a cooling liquid outlet port also communicated with the cavity of the cooling liquid storage tank is formed in the lower lateral portion of the cooling liquid storage tank, the cooling liquid inlet port is connected with a liquid outlet of a radiator of the transformer when in use, and the cooling liquid outlet port is connected with a tank body and communicated with a liquid cavity. According to the device, it can be guaranteed that the cavity of the evaporating pipe is in a flooded state, effective heat exchange can be conducted by the evaporating pipe on high-temperature oil introduced by the transformer, working temperature rise of the transformer is reduced, and the service life of the transformer is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of electric power supply and distribution facilities, and in particular relates to an evaporative liquid-flooded phase-change heat device for an oil-immersed transformer. Background technique [0002] The phase change mentioned above refers to the transition between the vapor phase and the liquid phase, more precisely, the coolant transitions between the vapor state and the liquid state. In order to ensure the normal operation of the oil-immersed transformer, it is necessary to equip the transformer with a cooler to reduce the working temperature rise of the transformer. For details, please refer to the Chinese Invention Patent Application Publication No. CN102360760A (Oil-evaporating liquid replacement for oil-immersed transformer Heat device), paragraphs 0002 to 0004 of the specification, this patent application scheme overcomes the deficiency of the invention patent application publication number CN10138...

AI Technical Summary

Problems solved by technology

In order to ensure the normal operation of the oil-immersed transformer, it is necessary to equip the transformer with a cooler to reduce the working temperature rise of the transformer. For details, please refer to the Chinese Invention Patent Application Publication No. CN102360760A (Oil-evaporating liquid replacement for oil-immersed transformer Heat device), paragraphs 0002 to 0004 of the specification, this patent application scheme overcomes the deficiency of the invention patent application publication number CN101388275A (a transformer heat exchanger using evaporative cooling technology), and objectively embodies the technical effect column of the specification However, this CN102360760A still has the following defects: First, due to the unreasonable structure of the evaporation tube (also known as the heat exchange tube) of the evaporator, the heat exchange effect cannot meet the expectations of people, and the evaporation If the evaporator meets the requirements of good heat exchange, it can only be compensated by increasing the number of evaporating tubes. However, increasing the number of evaporating tubes will lead to an increase in the volume of the evaporator and not only increase the difficulty and cost of manufacturing, but also increase the consumption of raw materials. ; Second, because it is impossible to detect the condition of the heat exchange medium, it is blind in the actual use process. For example, when the heat exchange medium is reduced or even seriously consumed due to factors such as leakage, the convective flow through the tank cavity will flow through the heat exchange chamber. The heat transfer effect of the transformer oil in the transformer oil will be severely reduced. However, because the reduction of the heat transfer medium cannot be detected, the temperature rise of the oil-immersed transformer will not be reduced as it should be, and there is a risk of burning the transformer.

[0003] The utility model patent authorization announcement number CN203325648U provides the "oil-evaporating liquid tube type phase-change heat device for oil-immersed transformers" that can make up for the lack of the aforementioned CN102360760A, but this CN203325648U still has the following shortcomings: due to the evaporating liquid in the evaporator It will gradually decrease with the passage of time, so when the evaporating liquid level in the lumen of the evaporating tube decreases, it will affect the heat exchange effect with the oil outside the tube, that is, the effective heat exchange area becomes smaller, so the oil immersion The high-temperature oil drawn from the type transformer cannot get the proper cooling, so the temperature of the oil returned to the transformer is high, which is not conducive to reducing the working temperature (working temperature rise) of the transformer, and even affects the reasonable service life of the transformer

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