A field sampling device dedicated to transformer insulating oil

Abstract

The invention relates to a field sampling device special for transformer insulating oil. The device comprises a core piston, a circular cover body, the central hole thereof is sleeved on the core piston, and a circular cylinder body which is matched with the circular cover body. A cylindrical core piston handle is screwed at the left end of the core piston. A core piston head matching with the inner diameter of the circular cylinder body is fixed at the right end of the core piston. A plurality of evenly-spaced capacity calibration loops are fixed at the surface of the middle part of the core piston. An air-exchange hole running through the circular cover body is arranged in the top surface of the circular cover body. Groove skirt edges with direction to the right are arranged at the periphery of the circular cover body. A pipeline communicated with the interior of the circular cylinder body is arranged at the right end of the upper sidewall of the circular cylinder body. An exhaust and oil discharge valve is arranged on the pipeline. A pipeline communicated with the interior of the circular cylinder body is arranged at the bottom surface of the right side of the circular cylinder body. An oil pumping valve is arranged on the pipeline. The sampling device avoids the contact of oil and air, can fix the volume in a container after quantitative sampling, avoids overpressure or cavatition in the container, and reduces sampling errors.

Description

technical field [0001] The invention belongs to the technical field of insulating medium analysis instruments, in particular to an on-site sampling device specially used for transformer insulating oil. Background technique [0002] At present, glass syringes of various specifications are generally used for sampling in chromatographic tests of transformer insulating oil, but in the field sampling process, the sealing and sampling process of glass syringes is relatively complicated. After sampling with a rubber head to seal, due to the quality of the rubber head or the aging of the rubber, it may fall off or the syringe is not tightly sealed. During the shaking extraction process, the glass syringe may fall out of the card slot and be damaged, resulting in sample preparation failure. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a field sampling device specially used for transformer insul...

AI Technical Summary

Problems solved by technology

[0002] At present, glass syringes of various specifications are generally used for sampling in chromatographic tests of transformer insulating oil, but in the field sampling process, the sealing sampling process of glass syringes is more complicated

After using the rubber head to seal after sampling, due to the quality problem of the rubber head or the aging of the rubber, it may cause falling off or the syringe is not tightly sealed

During the shaking extraction process, the glass syringe may fall out of the card slot and be damaged, resulting in sample preparation failure

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