Pneumatic type sample loader

Abstract

The invention discloses a pneumatic type sample loader which comprises a pressure chamber, wherein a piston block is arranged inside the pressure chamber, and a piston rod is connected above the piston block and drives the piston block to make a downward and upward reciprocating motion in the pressure chamber; the lower end of the pressure chamber is connected with a first fixed pressing cap, and a storage chamber is connected below the first fixed pressing cap; the first fixed pressing cap is provided with a first taper groove and a second taper groove, wherein the first taper groove penetrates through the pressure chamber and the storage chamber, and a taper opening of the first taper groove faces towards the pressure chamber; the second taper groove is connected with an air passage, and a taper opening of the second taper groove faces towards the storage chamber; the first taper groove and the second taper groove are internally provided with a spring respectively, wherein a steel ball supports against the upper side of the spring in the first taper groove to form a one-way valve from the pressure chamber to the storage chamber; a steel ball supports against the lower side of the spring in the second taper groove to form a one-way valve from the pressure chamber to atmosphere; and a lower port of the storage chamber is provided with a second fixed pressing cap, and a rubber sleeve is clamped between the second fixed pressing cap and the storage chamber.

Description

technical field [0001] The invention relates to a tool for measuring physical and mechanical parameters of rock samples, and more particularly relates to a pneumatic sample loader to facilitate the assembly of rubber-sealed samples in the testing of physical and mechanical parameters of rock samples. Background technique [0002] In the fields of engineering, energy application and earth science research, it is often necessary to determine the physical and mechanical parameters of rock samples. In the physical and mechanical parameter testing experiments of rock samples under pressure, the samples need to be tightly wrapped with sealing materials to prevent the pressure transmission medium from entering the samples. From the perspective of convenience and economy, rubber sleeves are often used as sealing materials. In practice, when using rubber sleeves to wrap samples, the following problems must be encountered: [0003] 1) It is difficult to load the sample. The experimen...

AI Technical Summary

Problems solved by technology

[0003] 1) It is difficult to load the sample. The experimental test requires the rubber sleeve to be close to the sample, so the inner diameter of the rubber sleeve should be smaller than the outer diameter of the sample, so as to use the elasticity of the rubber sleeve to tightly wrap the sample.

This leads to the need to stretch the rubber sleeve when putting the sample into the rubber sleeve, often by squeezing in forcefully, but this method is more laborious

The rubber sleeve used in practice often needs a certain thickness to meet the requirements of maintaining certain physical and mechanical properties under temperature and pressure, so it will be more laborious to squeeze the sample into a thick rubber sleeve;

[0004] 2) If the structure of the sample is relatively weak, it is easy to crush the sample if the pressure is too large when loading the sample

Images