Portable fast detector for detecting bonding stress of steel bar

Abstract

The invention relates to the field of testing devices, in particular to a portable fast detector for detecting the bonding stress of a steel bar. The portable fast detector comprises a shell, a clamp, hydraulic supports, a movable plate, a flange plate, a hollow jack, hydraulic cylinders, a miniature hydraulic pump, a digital pressure gauge, an input panel, a display and a controller, wherein the shell adopts an annular structure; the clamp is mounted on a telescopic rod of the hollow jack; the hydraulic supports are mounted on the shell; at least three hydraulic supports are provided; the movable plate is mounted on the shell and is positioned below the shell; the flange plate is mounted on the movable plate through screws; the hollow jack is mounted on the flange plate; the hydraulic cylinders are connected and mounted on the shell through threads and are communicated with an oil trough in the shell; three hydraulic cylinders are provided; the miniature hydraulic pump is mounted inside the shell; the digital pressure gauge is mounted on the shell; and the digital pressure gauge, the input panel and the display are connected with the controller. The portable fast detector is applicable to measurement of different sections; through uniform stress of the steel bar, the measurement error is reduced.

Description

technical field [0001] The invention relates to the field of testing devices, in particular to a portable quick tester for gripping force of steel bars. Background technique [0002] The grip strength is the physical quantity of the concrete's ability to resist the slippage of steel bars. In general, the grip strength refers to the shear stress along the contact surface between the steel bar and the concrete, that is, the bond stress. In fact, the stress and deformation state of the concrete around the steel bar are relatively complicated. The grip force makes the stress of the steel bar change with the length of the steel bar. It is also related to the strength of concrete itself, that is, the higher the compressive strength of concrete, the greater the grip strength. [0003] Most of the existing testing equipment for the gripping force of reinforced concrete is to test the standard test block of reinforced concrete. The detection equipment has certain limitations; and m...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing testing equipment for the gripping force of reinforced concrete is to test the standard test block of reinforced concrete. The detection equipment has certain limitations; and most of the existing detection equipment is used in conjunction with tensile testing machines or pressure testing machines, which makes the detection equipment difficult to carry and further limits the use of reinforced concrete grip testing equipment; and with the With the development of the construction industry and the continuous emergence of buildings, when it is necessary to test the grip strength of reinforced concrete at the construction site, it is obvious that the existing testing equipment cannot meet the actual needs of use; further, when the weight of reinforced concrete is large, it is not easy to carry , it is still impossible to actually detect

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