Single-shaped pulling-pressing double-function creepmeter

Abstract

The invention discloses a single-shaft pulling-pressing double-function creepmeter, which comprises a working platform, a pulling-pressing force loading system and a creep data measuring system. The working platform comprises a base, a first support rod assembly, a second support rod assembly, a press bearing plate, a pulling bearing plate, a working plate and a loading plate. The pulling-pressing force loading system comprises an oil drainage oil cylinder, a large-diameter oil cylinder and a small-diameter cylinder and further comprises a pulley weight loading device. The creep data measuring system comprises a strain sensor, a data collector and a microcomputer. The single-shaft pulling-pressing double-function creepmeter can be used for conducting both compression creep experiments andpulling creep experiments. The pulling-pressing force loading system can amplify weight loading load through a pulley block, and pressure can be amplified after being transferred to the large-diameter oil cylinder from the small-diameter oil cylinder, so that the loading force can meet requirements of a large mount of rocks for creep experiments. Simultaneously, the loading load is convenient to adjust and capable of maintaining constant for a long time. The creepmeter is high in measuring accuracy, low in manufacture cost and low in experiment cost due to the fact that the creepmeter consumes no electric energy in the experiment process.

Description

technical field [0001] The invention relates to an experimental instrument, in particular to a creep test device for materials such as concrete and rock. Background technique [0002] Creep refers to the phenomenon that the material deformation increases continuously with the growth of the specimen under the continuous action of constant stress. A large number of field tests and indoor tests have shown that all concrete and rock materials have certain creep properties. The creep effect of materials is an important influencing factor and deformation response of long-term project stability. Therefore, it is of great significance to study the creep characteristics of materials such as rock and soil mass and concrete for engineering design, construction and safe operation. [0003] At present, most of the tensile or compressive creep test devices for concrete and rock materials use rigid hydraulic servo test machines for loading. Although these devices have superior performance...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the tensile or compressive creep test devices for concrete and rock materials use rigid hydraulic servo test machines for loading. Although these devices have superior performance in load size control and data acquisition, they also have obvious disadvantages: First, the cost of the instrument is very high; second, the instrument consumes a lot of power during the test, and the creep test takes a long time, so the test cost is greatly increased; third, the tension and pressure loaded by the servo system are not stable enough, resulting in insufficient experimental accuracy

And for some other simple test devices, its loading principle is mainly to utilize the pulley block, lever principle or to load with jacks, these devices are easy to move, and the cost is low, but the effect of the hydraulic jack in the simple test device to maintain a stable load is not ideal, and Instruments made of levers or pulley blocks cannot provide large compressive loads, and are mainly only suitable for compression creep of some weak rock and soil materials or similar materials with low elastic modulus

Moreover, the existing equipment for testing the tensile creep and compressive creep of materials are two independent sets of equipment, and the equipment functions are relatively single.

Images