Sampling device for scale layer on metal surface

Abstract

The invention provides a sampling device for a scale layer on a metal surface, which comprises: a positioning plate made of a flexible material and suitable for being adsorbed on the surface of the scale layer, wherein the positioning plate is provided with a hollow part, and the hollow part is used for selecting an area to be sampled; and a collecting tank, wherein the collecting tank is provided with an accommodating cavity with a top opening and is used for receiving the scale sample, the collecting tank is connected to the positioning plate through a telescopic structure, the end face, connected with the collecting tank, of the telescopic structure is kept in a horizontal state by adjusting the length of the telescopic structure, and then the collecting tank is always in a vertical state under the action of gravity. The positioning plate can adapt to a plane and a curved surface, the to-be-sampled area can completely correspond to the hollow part, secondary adjustment of the hollow part is avoided, and the sampling device can be suitable for sampling in a narrow space; the collecting tank adapts to to-be-sampled areas with different inclination angles by adjusting the telescopic structure, so that the collecting tank is always in a vertical state, and scale samples can fall into the collecting tank under the action of gravity.

Description

technical field [0001] The invention relates to the technical field of sampling, in particular to a sampling device for scale layers on metal surfaces. Background technique [0002] In order to check and grasp the corrosion, scaling or salt accumulation status of thermal power generating units, comprehensively inspect and evaluate the quality control and supervision of water, steam and other media during its operation cycle, and the protection methods during unit stop / standby periods, it is necessary to regularly follow the standards Sampling and analysis of the scale layer on the surface of power generation equipment such as the inner wall of the steam drum, the blade of the steam turbine, and the inner wall of the deaerator during the outage of the generator set. [0003] At present, the specific operation method for scraping and sampling the scale layer is: prepare multiple sheets of paper with holes dug in a certain area, stick the paper to the surface of the equipment t...

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the disadvantages of using paper for auxiliary sampling in the prior art, the paper is difficult to completely fit with the dirt layer, easy to slide and the dirt sample is poorly received, thereby providing a metal Sampling device for surface scale layer

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