Automatic sampling device

Abstract

The invention discloses an automatic sampling device for sampling dirt on the surfaces of insulators of a transformer substation. The automatic sampling device comprises an automatic sampling mechanism (1) and an adjustable telescopic rod (2) connected with the automatic sampling mechanism (1), wherein the adjustable telescopic rod (2) comprises a mechanism body (10), two sample-preserving protecting covers (13), two sampling brushes (12), an electromagnetic assisting device (14) and two sampling brush spinning motors (15), the electromagnetic assisting device (14) is used for controlling an angle swinging connecting rod (11), and two ends of the angle swinging connecting rod (11) are respectively connected to the two sampling brushes (12). According to the embodiment of the invention, the automatic sampling device has the advantages of convenience in carrying and operation, high safety, good sampling effect and the like.

Description

technical field [0001] The invention relates to the technical field of dirt detection on the surface of substation insulators, in particular to an automatic sampling device for sampling dirt on the surface of substation insulators. Background technique [0002] With the development of industry, the phenomenon of artificial particle pollution has gradually become apparent; affected by it, the pollution flashover accidents that may be caused by the pollution of insulators pose a serious threat to the safe and stable operation of the power grid, so it is particularly important to effectively carry out anti-pollution work. In order to analyze the chemical composition of the dirt accumulated on the surface of the insulator, the high-voltage test personnel must sample the dirt from the surface of the experimental insulator in the substation. [0003] At present, the existing sampling method generally relies on manpower to ascend to work, and uses a dust brush to sample the dirt of...

AI Technical Summary

Problems solved by technology

However, there are obvious deficiencies in the existing sampling methods: First, there is a large hidden danger of climbing operations: according to the electrical safety work regulations, when the distance between the operating height and the ground exceeds 1.5m, a safety belt should be used, and the safety belt should be taken high hang low way

The installation position of the substation test insulator is generally 6-7m above the ground, and the sampling work requires climbing operations, but usually there is no higher part of the upper part of the test insulator to hang the safety belt, so in order to minimize the operation risk, usually Failure to sweep the upper insulator will result in insufficient and comprehensive sampling, which will eventually greatly affect the accuracy of the detection work

Second, the sampling efficiency is low: because the detection of the chemical composition of the dirt often requires the detection of the solid component first, and then the detection of the ionic component of the aqueous solution, the dirt sample taken initially must be in the form of a solid

However, the current sampling tool is usually an ordinary dust brush, which does not fit tightly with the insulator disc, and does not have good sample retention performance, resulting in low sampling efficiency

[0004] To sum up, the traditional dirt sampling technology on the surface of insulators has the defects of high operational risk and low sampling efficiency, and fails to play an effective supporting role in the subsequent chemical composition detection and further analysis.

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