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Undisturbed soil sampling device

A soil sampling and undisturbed technology, applied in the direction of sampling devices, etc., can solve the problems of increasing the resistance of the drilling process and not being able to completely seal the bottom of the core tube, so as to ensure the integrity and undisturbed effect

Active Publication Date: 2017-08-18
NANJING CENT CHINA GEOLOGICAL SURVEY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But adopt similar method also can not play the effect of completely sealing the bottom of coring pipe, and also can increase the resistance of soil drilling process

Method used

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  • Undisturbed soil sampling device
  • Undisturbed soil sampling device
  • Undisturbed soil sampling device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Such as Figures 1 to 6 As shown, in the present embodiment, the undisturbed soil sampling device which can be closed at the bottom comprises:

[0026] Outer tube 1, coring inner tube 2, movable ring cutterhead 3, blade 4, rotating shaft 5, crank arm blade end connecting shaft 6, ring cutterhead inner ring frame 7, linkage crank arm 8, ring cutter head outer ring frame 9, crank arm outer ring connecting shaft 10, step 11.

[0027] Wherein, the coring inner tube 2 is located inside the outer tube 1, and the bottom is provided with a movable ring cutter head 3; the inner side of the movable ring cutter head 3 is provided with six double-edged blades 4; the double-edged blades 4 are provided with a rotating shaft 5 and a crank arm The blade end connection shaft 6, the double-edged blade 4 is connected with the linkage crank arm 8 through the crank arm blade end connection shaft 6; the rotation axis 5 is fixed on the inner ring frame 7 of the ring cutter head; the outer en...

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Abstract

The invention discloses an undisturbed soil sampling device. The undisturbed soil sampling device comprises an outer pipe, a coring inner pipe located in the outer pipe, and a movable annular cutterhead located at the bottom of the coring inner pipe, wherein the movable annular cutterhead rotates in the outer pipe back and forth, so that the movable annular cutterhead is controlled to be opened and closed; when the movable annular cutterhead is opened, the bottom of the coring inner pipe is in an open state; when the movable annular cutterhead is closed, the bottom of the coring inner pipe is in a sealed state. By adopting the device disclosed by the invention, the lower end of the coring inner pipe can be completely sealed, so that the sampling integrity and undisturbed property are ensured to the greatest extent.

Description

technical field [0001] The invention relates to an undisturbed soil sampling device, in particular to a sampling device with a double-layer structure and an inner tube for taking cores. Background technique [0002] In the known technology, common soil and rock core sampling devices can be divided into drilling type and direct push type according to the propulsion mode. As the name suggests, the drilling type uses a rotary drilling method to drill the soil sampling tube into the soil layer. The direct push type uses static pressure to press the soil sampling tube into the soil layer. In addition, there is a combination of drilling and direct pushing, drilling in the outer layer and direct pushing in the inner layer, but this is not the mainstream method. For all types of sampling devices mentioned above, the structural features of the core tube are open at both ends and a hollow tube with a knife edge at the lower end, and the material is mostly high-strength steel. When ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/08
CPCG01N1/08
Inventor 周迅
Owner NANJING CENT CHINA GEOLOGICAL SURVEY
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