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Self circulation variable head permeability test experimental instrument

A technology of permeation experiment and variable water head, which is applied in the field of self-circulating variable water head Darcy permeation test instrument, can solve the problems of low precision and complex structure, and achieve the effects of high precision, small volume and convenient operation.

Active Publication Date: 2018-06-29
XIAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a self-circulating variable head Darcy permeation test instrument, which solves the problems of complex structure and low precision in the prior art

Method used

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  • Self circulation variable head permeability test experimental instrument
  • Self circulation variable head permeability test experimental instrument
  • Self circulation variable head permeability test experimental instrument

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Embodiment Construction

[0054] The structure of the self-circulation variable head Darcy permeation test instrument provided by the present invention is as follows: figure 1 As shown, the self-circulating water head Darcy permeation tester includes a base 1 on which a support seat 3, a sand holding container 12 and a backboard 17 are arranged in sequence, and the backboard 17 is vertically arranged on the base 1.

[0055] The support seat 3 is fixed on the base 1, the upper part of the support seat 3 is a hollow cylinder, the hollow cylinder is provided with a bottom opening and a measuring cylinder 8 with a measuring ruler 9 on the outer wall,

[0056] The height of the sand container 12 is greater than the height of the measuring cylinder 8, and a rectangular cap 11 is arranged on the upper end, and one end of the rectangular cap 11 protrudes above the measuring cylinder 8, and a water outlet 10 is provided at a position directly above the measuring cylinder 8,

[0057]Also vertically fixed on the ...

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Abstract

The invention discloses a self circulation variable head permeability test experimental instrument, which comprises a base. A support seat, a sand container, and a back plate are arranged on the basein sequence. The back plate is vertically arranged on the base. The support seat is fixed on the base through a bolt. A measuring cylinder is arranged on the support seat. A rectangular cap is arranged on the upper end of the sand container. The lateral wall of the sand container is provided with at least two through holes, and the distances between two through holes are equal. Each through hole is connected to a pressure measuring pipe guiding to the vertical direction. The lower end of the back plate is fixedly provided with a pressure measuring row. The pressure measuring pipe is fixed on the pressure measuring row. A water stabilizing tank is fixed on the upper end of the back plate. A water level variable pipe, which is the same height of the water stabilizing tank, is also fixed on the upper end of the back plate. One side, which is far away from the water level variable pipe, of the back plate is provided with a water tank. The provided experimental instrument can measure powdery soil with small viscosity, is capable of measuring head loss and seepage discharge of a sand sample, and calculates the hydraulic gradient and permeability coefficient. The experimental instrument is made of an organic glass material and has the advantages of transparency, small volume, easy preparation, high precision, and convenient operation.

Description

technical field [0001] The invention belongs to the technical field of fluid mechanics, and relates to a self-circulating variable head Darcy permeation test instrument. Background technique [0002] The Darcy permeation experiment is one of the necessary experiments in the teaching of fluid mechanics (hydraulics), and the Darcy permeation tester is a special instrument for the seepage experiment. At present, the Darcy seepage test instruments on the market are all with constant water head, that is, the water head is kept constant during the experiment. These instruments mainly include the TST-55 permeability tester used to measure the soil permeability coefficient with high water head, and the TST-70 permeability test instrument used to measure the sandy soil and non-cohesive soil with sandy gravel. For the Darcy permeation tester used in experimental teaching, all universities and research institutes develop their own according to their own needs, but these testers are al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
CPCG01N15/08
Inventor 张建丰张志昌杨浩胡晖
Owner XIAN UNIV OF TECH
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