Potable liquid sampling device and liquid sampling method

Abstract

The invention relates to a liquid sampling device and a liquid sampling method. The liquid sampling device comprises a sampling pipe, wherein a top spherical valve and a bottom end spherical valve are arranged on the two ends of the sampling pipe respectively; a spherical core rotary shaft of the bottom end spherical valve is connected with the middle part of a handle of the bottom end spherical valve; the outer side wall of a pipe body is provided with two rows of opposite rope threading guide rails; each row of the rope threading guide rail comprises a plurality of rope threading circular rings which are arranged at intervals; the rope threading circular rings are arrayed in the length direction of the pipe body to form a straight-line-shaped rope threading guide rail which is parallel to the pipe body; the starting end of a steel wire rope is connected with one end of the handle of the bottom end spherical valve and the tail end of the steel wire rope sequentially penetrates through the rope threading circular rings of the two rows of the rope threading guide rails to be connected with the other end of the handle of the bottom end spherical valve. The liquid sampling device provided by the invention is small in volume, simple in structure, wide in applicable range, and accurate and convenient in sampling; in a sampling process, liquids on different layers are not easy to mix, so that the sampling for a full-liquid-level liquid sample can be realized and the sampling for a liquid sample of a fixed layer can also be realized; the sampling is convenient and rapid, and the practicability is strong.

Description

technical field [0001] The invention relates to a liquid sampling device and a sampling method, in particular to a portable heterogeneous liquid sampling device in a large tank or tank car. Background technique [0002] There are many kinds of liquid chemical products, including acidic liquids, alkaline liquids, petroleum, coal tar, benzene, toluene, o-xylene, methanol, ethylene glycol, etc. The composition of liquid chemical products increases with the prolongation of residence time in the tank. It will change, and the composition of the liquid at different depths in the tank changes very obviously, especially the change of the contained moisture is more prominent. Therefore, according to the position (depth) of the liquid chemical products in the tank, the liquid chemical products can be divided into surface products, upper products, middle products and bottom products. The moisture content of the surface product, the upper product, the middle product and the bottom produ...

AI Technical Summary

Problems solved by technology

Although the sampler can extract liquid samples at different depths in the wellbore and the liquid in the middle cavity is closed to take out samples from other depths that are not easy to mix, the length of the pipe body of the sampler is 830mm, while the common tank car Or the depth of the large tank is about 15m. Using this sampler to extract the liquid samples in the tank car or the large tank can only get a part of the liquid samples. For the liquid samples of the whole liquid level, it cannot be sampled all at once, and the sampling is limited. The setting of the normally closed self-returning liquid one-way valve under the bottom of the body makes it difficult to pour out the sampled liquid

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