Cryptomorphic shaft-valve type soil sampler
A technology of earth taker and shaft valve, which is applied in the field of foundation soil survey, construction, infrastructure engineering, etc., and can solve the problems of soft soil soil sample quality, inability to take soil samples, and narrow muddy water discharge pipes, etc.
Inactive Publication Date: 2004-03-10
王子平
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Problems solved by technology
[0003] The purpose of the present invention is to solve the problems of the lift valve type and ball valve type samplers in the prior art. The muddy water discharge pipe is narrow, which easily causes the back pressure of the muddy water to the soil sample when draining, causing the quality of the soft soil soil sample to be affected. During the sampling process, when the sediment in the upper discharge mud water sticks to the matching surface of the lifting valve or the matching surface of the steel ball and the ball seat surface, sometimes the sealing requirements for lifting the soil sample cannot be met, and the soil sample will fall during sampling. The problem of not being able to take soil samples
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[0005] In the figure, there are earth-borrower 1, earth-borrower head 2, shaft 3, and hollow drill pipe joint 4. It is characterized in that: there is shaft 3 under the drill pipe joint 4, the upper part of shaft 3 has axial hole 5, and the lower part of shaft 3 There is a radial through hole 6, the axial hole 5 of the shaft 3 communicates with the through hole 6 of the shaft 3, the lower end of the shaft 3 has a sealing ring 7, and the diameter of the lower half of the shaft 3 is larger than that of the upper half , a step 8 is formed in the middle of the shaft 3, the step 8 corresponds to the upper end step 9 of the inner hole of the soil-taking tool head 2, a key 10 is provided on the outside of the shaft 3, and the key 10 cooperates with the chute 11 in the soil-taking tool head 2, There is a counter-perforation 12 at the position corresponding to the customary through-hole 6 of the soil-taker head 2 and the shaft 3, the counter-perforation 12 of the soil-taker head 2 is a ...
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A hidden shaft valve type soil sampler is composed of soil sampling barrel, sampling head, shaft and hollow drilling rod jointer on said shaft which has axial hole in its upper part, radial through hole on its lower part and sealing ring at its lower end. Said axial hole is communicated with said radial through hole. Said shaft has also a step at its middle part for matching with the top step in the internal hole of sampling head which has through hole relative to the 8-shaped axial through hole. Its advantages are smooth discharge of sludge, reliable sealing and easy cleaning.
Description
technical field [0001] The invention relates to an earth taker, in particular to an invisible shaft valve type earth taker. Background technique [0002] The earth taker is a special tool for taking soil samples from the strata in engineering geological drilling. When pressing down to take soil samples from the stratum, the muddy water entering the earth taker needs to be discharged from the top of the earth taker, and when taking soil samples upwards, then It is necessary to form and maintain a seal on the soil sample to ensure that the soil sample is sucked by the negative pressure and does not fall, but some existing soil fetchers use such as figure 1 , 2 The raised valve type and the ball valve type shown have narrow muddy water discharge channels, which easily cause the backpressure of the muddy water on the soil sample when the muddy water is discharged, resulting in the quality of the soft soil soil sample being affected. When the silt sticks on the matching surface...
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IPC IPC(8): E02D1/04
Inventor 王子平王静艳
Owner 王子平