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Triple-pipe single-acting pressure compensation type rotary soil sampler and soil sampling method

A soil borrower and dynamic pressure technology, which is applied to the sampling device and other directions, can solve the problems that the soil sample is not easy to enter the tube shoe, cannot cut the soil layer well, and the sampling efficiency is not high, so as to improve the sampling quality and efficiency, good sealing, The effect of improving sampling efficiency

Pending Publication Date: 2022-03-11
CHINA RAILWAY DESIGN GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the above-mentioned prior art also has the following deficiencies and defects. First, when sampling hard soil layers, the soil sample is not easy to enter the pipe shoe, causing the drill bit to be suspended, which cannot cut the soil layer well, and the sampling efficiency is not high; secondly, the valve is used to Design, complex structure, inconvenient loading and unloading

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  • Triple-pipe single-acting pressure compensation type rotary soil sampler and soil sampling method
  • Triple-pipe single-acting pressure compensation type rotary soil sampler and soil sampling method
  • Triple-pipe single-acting pressure compensation type rotary soil sampler and soil sampling method

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Embodiment Construction

[0045] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0046] see Figure 1 to Figure 8 , a triple-pipe single-action pressure-compensated rotary soil fetcher, comprising a drill pipe joint 1, and an outer pipe 2 that rotates with the drill pipe joint, and the outer pipe 2 includes an upper section 2-1 of the outer pipe and a lower section 2 of the outer pipe -2, wherein the upper section of the outer pipe is threaded to connect the drill pipe joint, the lower end of the upper section of the outer pipe is threaded to the upper end of the lower section of the outer pipe, and the lower end of the lower section of the outer pipe is threadedly connected with a drill bit 3; The inn...

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Abstract

The invention discloses a triple-pipe single-acting pressure compensation type rotary soil sampler and a soil sampling method, the triple-pipe single-acting pressure compensation type rotary soil sampler comprises a drill rod joint, an outer pipe and a drill bit which are connected in sequence, and further comprises a feed pressure compensation mechanism in the outer pipe and an inner pipe soil sampling mechanism doing linear motion; the feed pressure compensation mechanism is connected with the drill rod joint, and the feed pressure compensation mechanism is connected with the inner pipe soil sampling mechanism; a communicated water passing channel is formed among the outer pipe, the feeding pressure compensation mechanism and the inner pipe soil sampling mechanism; through the feeding pressure compensation mechanism, the length of the inner pipe advance drill bit is automatically adjusted according to the hardness degree of a soil layer; the feeding pressure compensation mechanism utilizes the cam principle to realize that the soil sampler provides circulating reciprocating axial propulsive force for the inner pipe soil sampling mechanism (not rotating) in the outer pipe rotary drilling process, so that the soil cutting capability of a pipe shoe is enhanced, the sampling quality is ensured, and the sampling efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of soil sampling equipment for geotechnical engineering reconnaissance, in particular to a triple-pipe single-action pressure-compensated rotary soil fetcher and a soil fetching method. Background technique [0002] Drilling and sampling is one of the important links in engineering geological survey. The quality of samples directly affects the test indicators and has an important impact on engineering design. The sampling quality of undisturbed soil is mainly affected by the soil extractor and sampling operation. At present, the common soil fetches on the market are 1. Thin-wall and thick-wall penetration soil fetches; 2. Double-tube single-action rotary soil fetchers from Denison and Pichel; 3. Double-tube double-action rotary soil fetchers and other types According to the requirements of the specification, only the thin-wall soil extractor and the rotary soil extractor can obtain the original state withou...

Claims

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Application Information

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IPC IPC(8): G01N1/08
CPCG01N1/08
Inventor 陈新军陈则连曹虎崔庆国李国和高敬
Owner CHINA RAILWAY DESIGN GRP CO LTD
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