A dry humidity control system

Abstract

The invention discloses a dry and humidity control system. The system is characterized in that the system comprises a water adding container which is arranged outside a sample drum, and the water adding container is connected with the outer wall of an inner cylinder through a pipe and is communicated with the inner cylinder lumen. According to the invention, the dry and humidity control system can be used for the experiment of a salt expansion tester, and has the advantages of simple structure, convenient implementation, and convenient dry and humidity control; and the influence on the experiment process is reduced to ensure the experiment precision.

Description

technical field [0001] The invention relates to a salt expansion tester in the field of salt expansion hazard research of saline soil, in particular to a dry humidity control system of the salt expansion tester. Background technique [0002] saline soil is saline and alkaline earth and various salinization, alkaline soil the general term for. Saline soil refers to the soluble salt content in the soil that is significantly harmful to crop growth. Soil . Salt content indicators vary with different salt compositions. Alkaline soil refers to the soil containing a large amount of exchangeable sodium that harms plant growth and changes soil properties. Saline soil is mainly distributed in inland arid, Half arid area , There are also distributions in coastal areas. The area of ​​saline soil in the world is about 8.97 million square kilometers, accounting for about 6.5% of the world's total land area and 39% of the total area of ​​arid regions. The area of ​​saline so...

AI Technical Summary

Problems solved by technology

At present, the existing salt expansion tester still has the following shortcomings: ①It can only do the salt expansion test under the action of temperature (freeze-thaw cycle, temperature gradient) and load, and cannot realize the dry-wet cycle with continuous change of water content under constant temperature The salt expansion test cannot realize the salt expansion test coupled with the freeze-thaw cycle and the dry-wet cycle under load; ②The function is simple and the degree of integration is low; ③The sample bucket with an overall structure is used, and the sample size and height of the salt expansion test are relatively large , during the test, the sample bucket significantly constrains the vertical salt expansion of the sample, resulting in significantly smaller test results; ④ The height of the test bucket is fixed, resulting in limited adjustment of the sample height and size

[0007] But among them, how should the specific structure of the dry humidity control system be designed so that it has the characteristics of simple structure, easy implementation, convenient realization of dry humidity control, reduced impact on the test process and guaranteed test accuracy, has become a problem to be considered

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