Simulation control system for testing environmental parameters of salt expansion tester

Abstract

The invention discloses a simulation control system for testing environmental parameters of a salt expansion tester. The simulation control system comprises a temprature regulating system; the temprature regulating system comprises a circulating liquid temperature control device A; the circulating liquid temperature control device A is circularly communicated with a peripheral circulating liquid chamber composed of a circulating liquid pipeline and a gap between an outer bucket and an inner barrel; the simulation control system is characterized in that a top circulating liquid chamber is adjacently formed above the top surface of an inner chamber of the inner barrel; the top circulating liquid chamber is circularly communicated with the circulating liquid temperature control device A through the circulating liquid pipeline; a bottom circulating liquid chamber is adjacently formed below the bottom surface of the inner chamber of the inner barrel and the bottom circulating liquid chamber is circularly communicated with a circulating liquid temperature control device B through a circulating liquid pipeline. The simulation control system has the advantages of realizing control on more environmental parameters, improving testing simulation effect, improving the testing precision and the like.

Description

technical field [0001] The invention relates to the field of research on salt expansion hazards of saline soil, in particular to an environmental parameter simulation control system of a salt expansion tester. Background technique [0002] saline soil is saline with 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 soi...

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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

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