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Method for sealing sample with high hydraulic pressure

A technology of high water pressure and sealing ring, which is applied in measuring devices, analysis of suspensions and porous materials, scientific instruments, etc., to achieve the effect of simple method, good sealing effect and solving the problem of penetration

Inactive Publication Date: 2011-10-05
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heat-shrinkable sleeve is broken down, and it is often necessary to replace the heat-shrinkable sleeve and reload the sample

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0013] The method of this embodiment 2 is to use a conventional heat-shrinkable sleeve, first to preheat and dry the force transmission column, and then install the high-elastic and thickened sealing ring into the force transmission column slot. For the connection between the sample and the force transmission column, the purchased hot-melt gun glue made of ethylene-vinyl acetate copolymer (EVA) as the main material, adding a tackifier and other ingredients chemical reaction with water, which has no effect on the test results), and then wrap the hot-melt film around the contact between the force transmission column and the sample, and make the hot-melt film cover the sealing ring. If there are pores on the surface of the sample, it is necessary to wrap the sample as a whole with a hot melt adhesive film. Then put on the heat-shrinkable sleeve, and heat-shrink it with hot air from the middle to both ends. During the heat-shrinking process, the hot-melt film melts and automatica...

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PUM

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Abstract

The invention provides a sample sealing method under high water pressure, which comprises preheating and drying each tension transfer columns abutted with the sample, mounting a high-elasticity sealing ring into the chutes on the tension transfer columns, coating thermal-fusion adhesive on the inner wall of a heat shrinkable sleeve or coating thermal-fusion adhesive on the connection between the sample and the tension transfer columns, sheathing the heat shrinkable sleeve on the sample and tension transfer columns, heating and shrinking from middle to two ends to completely fuse the adhesive to stuff the seams between the sample and tension transfer columns or stuff the pore seams between the sample and tension transfer columns and the pore spaces on the sample surface. The invention has better sealing effect, which can effectively resolve the puncture problem of surrounding pressure and sample.

Description

Technical field: [0001] The invention relates to a sealing method mainly used in rock (body) permeability testing and rock (body) conventional triaxial test research under the action of high pore water to separate samples from confining pressure water. Background technique: [0002] Conventional triaxial tests generally use oil as the confining pressure liquid, and use heat shrinkable sleeves and sealing rings to separate the sample from the confining pressure liquid. Because the viscosity of the oil is relatively large, and the size of the sample is small (the diameter of the sample is generally less than 100mm), it is easy to isolate the confining pressure oil from the sample. For large-sized samples (φ100~φ300), it is difficult to achieve a good flatness at both ends of the sample. There are often small gaps between the upper and lower force transmission columns of the sample and the sample. When the confining pressure is increased, the Wearing heat shrink tubing failed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
Inventor 黄润秋徐德敏虞修竞付小敏
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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