Tensioning elongation value measuring device for prestressed tensioning construction

Abstract

The invention discloses a tensioning elongation value measuring device for prestressed tensioning construction, which is mainly used for measuring a tensioning elongation value of a steel strand and measuring a piston elongation value of a tensioning jack in the prestressed tensioning construction. The tensioning elongation value measuring device comprises a graduated scale device and a pointer device, wherein the graduated scale device comprises a graduated scale and a base; the base is fixedly connected with the initial scale end of the graduated scale and is connected with a rear side end cover of the tensioning jack; the graduated scale is parallel to the axis of the tensioning jack; the pointer device comprises a pointer and a sleeve; one end of the pointer is fixedly connected with the outer side wall of the sleeve, and the pointer is perpendicular to the axis of the sleeve; the sleeve is sleeved at the exposed end of the steel strand to be tensioned, which penetrates through the tensioning jack; the pointer is contacted with the graduated scale; and a locking mechanism is arranged on the sleeve. The tensioning elongation value measuring device can be used for measuring the tensioning elongation value accurately and in real time, thus greatly improving the construction quality and the construction efficiency as well as the construction safety.

Description

technical field [0001] The invention relates to a tension elongation measuring device for prestress tension construction, which is mainly used for measuring the tension elongation and retraction value of steel strands in prestress construction, and measuring the piston elongation of tension jacks value. Background technique [0002] In the prior art, when prestressed products are stretched by jacks, there are often hidden dangers of accidents such as slipping wires or steel strands breaking due to improper operation or material reasons, oil cylinder explosion due to operating errors, and jack fixing bolts flying out and hurting people. Construction workers should stay away from the jack during tensioning, especially to avoid human hands or heads appearing at the rear end of the jack during tensioning. When the jack is stretched, a wooden or iron protective wall should be installed at the rear end of the jack to avoid clips, Steel strands, jack fixing bolts, etc. flew out an...

AI Technical Summary

Problems solved by technology

At present, the tensile elongation value is measured with a hand-held steel ruler, which is dangerous and cannot be measured in real time. It must wait until the tensioning stage is completed and the oil pump stops supplying oil before measurement can be performed. The tensioning construction efficiency is low and cannot be measured. Timely discover and deal with the out-of-tolerance phenomenon of elongation value, which will affect the construction quality

In addition, due to the inability to measure the elongation of the tensioning jack in real time in the prior art, if the frictional resistance on both sides is unequal or the oil supply speed of the oil pump is different during the tensioning process, it is easy to cause the jack cylinder at one end to elongate beyond the standard, resulting in The jack fell and was damaged, and there were safety and quality risks in the operation process

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