Testing device for testing temperature change of liquid nitrogen frozen soil

CN224176454UActive Publication Date: 2026-04-28BEIJING CHINA COAL MINE ENG CO LTD

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: BEIJING CHINA COAL MINE ENG CO LTD
Filing Date: 2025-06-03
Publication Date: 2026-04-28

AI Technical Summary

Technical Problem

Existing technologies are insufficient to accurately simulate and measure the freezing temperature variation under different parameter combinations in liquid nitrogen freezing methods in a laboratory environment. The systematic comparative test equipment and methods for influencing factors are also imperfect, resulting in low design accuracy and construction efficiency of freezing methods.

Method used

An experimental device for testing soil temperature changes by freezing with liquid nitrogen was designed, including an experimental chamber, a temperature measurement point arrangement plate, a freezing tube, and a temperature sensor. By flexibly adjusting the diameter of the freezing tube, the liquid nitrogen supply parameters, and the geological structure, combined with the arrangement of the turntable and sensor slots, multi-angle temperature measurement and real-time monitoring can be achieved.

Benefits of technology

It enables precise simulation and measurement of freezing temperature variation under laboratory conditions, improving the design accuracy and construction efficiency of freezing methods and adapting to the study of freezing effects under different engineering conditions.

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Abstract

The utility model discloses a testing device for testing temperature change of liquid nitrogen frozen soil. The device comprises a test box body, a temperature measuring point arrangement plate, a freezing pipe and a temperature sensor, the temperature measuring point arrangement plate is arranged in the test box body, and the plate surface of the temperature measuring point arrangement plate is parallel to the bottom wall of the test box body; the temperature measuring point arrangement plate is provided with at least two freezing pipe fixing holes, and the freezing pipes penetrate through the freezing pipe fixing holes. A plurality of hole groove structures are arranged on the temperature measuring point arrangement plate in the circumferential direction of each freezing pipe fixing hole, the hole groove structures penetrate through two plate surfaces of the temperature measuring point arrangement plate, and the temperature sensors are inserted into the hole groove structures. The device can flexibly adjust the diameter of the freezing pipe, liquid nitrogen supply parameters and geological simulation media under controllable conditions, and accurately simulate and measure freezing temperature change rules under different parameter combinations.

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