Liquid sampling device

Abstract

The invention provides a liquid sampling device which comprises a liquid storage device, a liquid inlet one-way valve, a liquid inlet automatic piston, a liquid outlet one-way valve, a liquid outlet automatic piston, a horn-shaped liquid guide port, a round liquid inlet filter screen, a conical liquid outlet filter screen, a conical protection cover and an air bag, wherein a liquid outlet is formed on the upper end surface of the liquid storage device; the liquid outlet automatic piston, the liquid outlet one-way valve and the conical protection cover are sequentially arranged above the liquid outlet; the conical liquid outlet filter screen is arranged in the protection cover; the liquid inlet one-way valve, the liquid inlet automatic piston and the round liquid inlet filter screen are sequentially arranged at the lower end of the liquid storage device; the air bag is arranged between the liquid inlet automatic piston and the liquid inlet one-way valve; and the horn-shaped liquid guide port is formed below a round hole in the middle of the round liquid inlet filter screen. The liquid sampling device provided by the invention has the characteristics of better sample quality, simplicity in operation, relatively high practicability, relatively low cost and the like, and can be applied to the fields of sample acquisition and analysis and the like.

Description

technical field [0001] The invention relates to liquid extraction technology, in particular to a liquid sampling device. Background technique [0002] In practical applications, the size of the borehole drilled by the drilling equipment is relatively small, which makes sampling difficult. Sampling difficulties will cause a certain degree of interference in liquid detection and analysis in environmental protection, engineering and other industries; for example, fixed-depth sampling for isolated and extracted liquids at a certain depth. At present, there are mainly two methods for sampling at a fixed depth: one is to use a small water pump, and the other is to lower the container to a predetermined depth for sampling. The sampling depth is limited by using a small water pump, and the cost is high; when the container is lowered to a predetermined depth for sampling, the poor sealing makes the sample susceptible to interference, and the size of the drilling hole will impose cer...

AI Technical Summary

Problems solved by technology

The sampling depth of the small water pump is limited, and the cost is high; the sampling method of lowering the container to a predetermined depth has poor sealing performance, which makes the sample easily disturbed, and the size of the drilling hole will impose certain requirements on the shape and size of the container.

[0003] It can be seen that in the prior art, the sampling method has problems such as poor sample quality, complicated operation, poor practicability, and high cost.

Images