Gravity hydraulic dead load energy-saving equipment and true triaxial creep experiment system

Abstract

The invention discloses a gravity hydraulic constant load energy storage device and a true triaxial creep experiment system. The gravity hydraulic constant load energy storage device comprises a fixed piston and a movable cylinder body, the outside of the cylinder body is provided with a carrier platform, when the carrier platform is provided with heavy objects with different weights, a hydraulic loading system is provided with constant loads of different sizes by a fluid infusion hole, and a sample is loaded by the fluid infusion hole and a line. The pressure produced by the heavy objects is balanced by a hand pump so as to supply liquid to the system and provide constant static pressure, and the constant pressure provided by the gravity hydraulic constant load energy storage device can also be changed into different pressures so as to be suitable for axial pressure and side pressure differences in a creep experiment and given pressure differences in a seepage test, thus reducing experimental cost caused by power consumption of the creep experiment.

Description

technical field [0001] The invention relates to a loading test technology, in particular to a gravity hydraulic constant load energy storage device and a true triaxial creep test system. Background technique [0002] In the prior art, there are two kinds of power devices for creep experiments, one is a device that uses a hydraulic pump to load, and the other is a device that relies on the weight of a heavy object to load through a mechanical transmission. [0003] The hydraulic pump provides high-pressure liquid for the creep sample device, and loads the coal rock sample through the clamping device. However, during the creep (or volume change) process of the sample, the load applied to the end face of the sample is always at a certain level. The load line fluctuates up and down, and the experimental results cannot reach the strict constant load of the creep test; at the same time, the creep test generally takes a relatively long time, and the hydraulic pump is always in the ...

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Problems solved by technology

[0003] The hydraulic pump provides high-pressure liquid for the creep sample device, and loads the coal rock sample through the clamping device. However, during the creep (or volume change) process of the sample, the load applied to the end face of the sample is always at a certain level. The load line fluctuates up and down, and the experimental results cannot reach the strict constant load of the creep test; at the same time, the creep test generally takes a relatively long time, and the hydraulic pump is always in the working state during the test, which causes a lot of energy consumption and increases Experiment fee

[0004] Using the principle of leverage or gear transmission to provide power for creep experiments with heavy objects, the load value (tonnage) and displacement are greatly limited, and it is difficult to provide horizontal loads, so only uniaxial compression creep experiments can be performed. The obtained results are very limited in the understanding of the creep mechanical properties of coal rock samples under complex conditions

[0005] The above-mentioned prior art has at least the following disadvantages: the structure is relatively complex, and it is difficult to provide the requirements for creep dead load

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