Oil sampling device for on-load switch of transformer

Abstract

The invention relates to a transformer on-load switch oil sampling device which comprises a transformer on-load switch and an oil drain valve, a connecting flange is arranged on the upper side of the oil drain valve, a connecting cylinder is arranged on the upper side of the connecting flange, an oil sampling pipe fixing frame is arranged in the connecting flange, an oil sampling pipe is arranged in the middle of the oil sampling pipe fixing frame, and an oil inlet is formed in the bottom of the oil sampling pipe. A connecting pipe is arranged on the upper side of the oil taking pipe, a control valve is arranged on the outer side of the bottom of the connecting pipe, the other end of the connecting pipe is connected with an oil outlet pipe, and an oil outlet is formed in the tail end of the oil outlet pipe; a one-way valve is arranged in the middle of the oil outlet pipe, a fixing frame is arranged on the outer side of the oil outlet, a sampling bottle fixing block is arranged on the inner side of the fixing frame, and a sampling empty bottle is arranged in the sampling bottle fixing block; the oil extraction device has the advantages of simple structure, convenience in operation, rapidness in oil extraction and time saving.

Description

technical field [0001] The invention belongs to the technical field of oil sampling, in particular to an oil sampling device for a transformer on-load switch. Background technique [0002] The on-load switch is one of the important components of the transformer. It can adjust the voltage with load within the rated capacity range, and the adjustment range is large, which can reduce or avoid large voltage fluctuations. The main working principle is that the winding of the transformer is small and leads to several points. Connect the tap, through the on-load tap changer, under the condition that the load current is not cut off, switch from one tap to another to achieve the purpose of changing the effective number of turns of the winding, that is, changing the transformation ratio of the transformer. The on-load switch is filled with insulating oil, which is an important part of maintaining the operation of the on-load switch. During long-term use, impurities will appear inside ...

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Problems solved by technology

[0002] The on-load switch is one of the important components of the transformer. It can adjust the voltage with load within the rated capacity range, and the adjustment range is large, which can reduce or avoid large voltage fluctuations. The main working principle is that the winding of the transformer is small and leads to several points. Connect the tap, through the on-load tap changer, under the condition that the load current is not cut off, switch from one tap to another to achieve the purpose of changing the effective number of turns of the winding, that is, changing the transformation ratio of the transformer. The on-load switch is filled with insulating oil, which is an important part of maintaining the operation of the on-load switch. During long-term use, impurities will appear inside the insulating oil, which will seriously affect the operation of the on-load switch. The insulating oil is regularly inspected to detect abnormal conditions of the on-load switch in time and to avoid accidents during use. The current traditional sampling method is: first align the device for storing samples with the oil discharge valve cover on the oil discharge pipe, and then Use wrench and other tools to remove all the bolts on the oil drain valve cover, open the oil drain valve cover for sampling, and install the oil drain valve cover after the sampling is completed. The process is time-consuming and labor-intensive, and generally requires the cooperation of multiple people It is difficult to be completed by only one person alone, and it is easy to cause leakage and waste of insulating oil when disassembling the oil drain valve cover, resulting in a decrease in the oil level in the on-load switch and affecting the operation safety of the transformer on-load switch; therefore, providing a A transformer on-load switch oil sampling device with simple structure, convenient operation, quick oil extraction and time-saving is very necessary

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