Grit sampling apparatus

Abstract

This invention relates to the gravel sampling device, which includes: the steel sampling tube, the top closed and the bottom external having the spiral blade; the horizontal sample-out groove, cuttingat the tube wall of the steel sampling tube; the avoiding-light box, installed in the steel sampling tube; the tubular pressure bar, its top having pressure stalk and the first square pier in turn, and the bottom of the tubular pressure bar is fixed in the top center of the steel sampling tube; the spring, installed between the said steel sampling tube top and the bottom center of the avoiding-light box; the worm, its top having turbine stem and the second square pier in turn, and the worm passes top-down through the pressure stem, the square pier, the tubular pressure bar and the spring, tothe lower part of the steel sampling tube, and the tubular pressure bar bottom having blade group. The device can collect enough sand from the gravel under the avoiding-light condition of fieldwork, and can resolve samples lack problem of ray release and electron spin resonance dating, and it has simple structure, and convenient to operate. Simple structure, high performance, easy operation, and low price.

Description

technical field [0001] The invention relates to a gravel sampling device, more particularly to a gravel sampling device for collecting sand in the gravel under the condition of avoiding light in the field. Background technique [0002] It is necessary to collect loose sediment samples protected from light on the surface or on the section for analysis of the depositional environment and determination of sediment optical luminescence and electron spin resonance ages. The commonly used sampling method is: put one end of the cylindrical hollow metal tube against the sediment on the profile, and insert it into the sediment by hammering. Because the sediments in the profile are different from underwater sediments such as oceans, lakes and rivers, they are hard in texture and difficult to insert, especially the uneven size of gravel materials such as glacier deposits, collapse deposits and debris flow deposits, making it more difficult to collect. Since the collected samples requi...

AI Technical Summary

Problems solved by technology

Similar samplers currently in use require a drilling platform and mechanical power. It can continuously drill loess samples tens of meters thick in soft soil, but cannot take gravel samples.

Existing geological drilling equipment can collect undisturbed samples of sand and gravel, but this equipment is bulky, requires multiple people to operate, and requires a special drilling platform and power system

Expensive, priced at more than 100,000 to hundreds of thousands of RMB

The other type is the portable gravity sampler invented by the applicant, that is, the sampling tube is pressed into the mud by the weight of the sampler itself, but it can only be used to collect sediments under water bodies such as rivers, lakes and seas.

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