Dissolution-method sampling device for large-area surface

Abstract

The invention discloses a dissolution-method sampling device for a large-area surface. The dissolution-method sampling device comprises a dissolving chamber, an injection device, an eduction tube, a first release valve and a flexible sealing element, an opening is formed in the position where the dissolving chamber abuts against the surface of the sampling target, and a flexible sealing piece is arranged between the opening of the dissolving chamber and the surface of the sampling target; an injection device is arranged at the top of the dissolving chamber, an eduction tube is arranged at the lowest position of the bottom of the dissolving chamber, and a first release valve is arranged on the eduction tube. According to the invention, the problem of difficulty in sampling by a large-area surface dissolution method is solved, substances on the surface of the cargo hold can be conveniently extracted to the greatest extent, the sampling reliability is high, and the sampling is slightly influenced by manual operation differences. The device is not only suitable for chemical ship cabin inspection sampling, but also suitable for dissolving method sampling of other vertical or approximately vertical large-area surfaces.

Description

technical field

[0001] The invention relates to the field of sampling, in particular to a sampling device for a large-area surface by a dissolution method. Background technique

[0002] When chemical tankers change the type of cargo loaded, it is necessary to clean the inner wall of the cargo hold, and the cleaning effect must meet the cleanliness standards required by the planned cargo loading, so as to ensure the quality of the loaded cargo.

[0003] Among the existing methods for determining the tank cleaning effect, the dissolution method has the highest accuracy for the test results of sampling. Usually, the front, rear, left, and right bulkheads in the tank are selected as the sampling area, and the sample solvent is sprayed on the cargo tank bulkhead. The substances remaining on the bulkhead are rinsed and dissolved to form a certain area of ​​liquid flowing, and the lower end is attached to the bulkhead with the flat end of the funnel, and the remaining liquid is col...

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