Jaw vice anchorage anchor device used for single-hole steel strand fatigue test

Abstract

The invention discloses a jaw vice anchorage anchor device used for single-hole steel strand fatigue test. The jaw vice anchorage anchor device comprises an oil cylinder; a fixed disc and a pressing disc are fixedly arranged on the upper part of a piston rod of the oil cylinder successively; the pressing disc is provided with a center circular hole used for accommodating steel strands and at least two installation holes used for accommodating vertical guide rods; the lower part of the pressing disc is provided with a radial opening groove; the installation holes are communicated with the radial opening groove; a vertical spring is arranged between each vertical guide rod and the fixed disc; each vertical guide rod and the corresponding spring are slidingly connected with an integral groove formed by the radial opening groove and a corresponding installation hole; a wedge-shaped head of each vertical guide rod is inserted into a gap of sub-jaws; a radial rod fixedly connected with the vertical guide rods is arranged in the radial opening groove, and is stretches out from the pressing disc; a cylinder body of the oil cylinder is fixedly arranged on a counterforce frame; the counterforce frame is provided with a pressing plate and limiting bolts; the lower end of the pressing plate is pressed against the upper end of an anchor ring; the pressing plate is penetrated by one end of a steel strand with a jaw vice anchorage, and the other end of the steel strand is arranged to be right above the center circular hole; and the limiting bolts are arranged right above one rod end of the radical rod stretched out from the pressing disc. The jaw vice anchorage anchor device is capable of realizing automatic anchoring of a jaw vice anchorage on single-hole steel strands.

Description

technical field [0001] The invention relates to an anchoring device of a clip-type anchor, in particular to a device for quickly assembling a clip-type anchor in a fatigue test of a single-hole steel strand and enabling the clip to clamp the steel strand so as to anchor the steel strand. Background technique [0002] Due to the advantages of low relaxation, high tensile strength, good stability, and long shelf life, steel strands are widely used in bridges, subways, railways, nuclear power and other public engineering technical fields. Among them, steel strands anchored by clip anchors are the most used. stranded wire. In order to ensure the quality of the project, the country has issued corresponding norms and standards to regulate the production, inspection, installation, use and maintenance of steel strands. There are special regulations that require steel strands to carry out fatigue performance tests before engineering applications. Assessment to ensure product quality...

AI Technical Summary

Problems solved by technology

[0003] At present, in the fatigue test of single-hole steel strands, clip anchors are usually used to anchor the steel strands. For the structure of clip anchors, see figure 1 , usually includes an anchor ring 20, two or more sub-clips assembled along the circumferential direction of the tapered clip 30, the outer surface of the clip 30 is tapered, with a cylindrical wire groove inside, each sub-clip There is a gap between them, the anchor ring 20 has a tapered hole, the taper of the tapered hole is the same as the taper of the clip 30, the clip 30 is sleeved in the anchor ring 20, and the single-hole steel strand 40 passes through the clip 30, thus completing the assembly of the clip-type anchor and the single-hole steel strand 40, and then anchoring the single-hole steel strand, the common anchoring method for anchoring the single-hole steel strand is to use a screwdriver to adjust the gap between the clips Uniform force, and then use a hammer to hit the sub-clip. During the anchoring process, according to the change in the gap of the sub-clip caused by the percussion, use a screwdriver to fine-tune the sub-clip and gradually tighten the sub-clip, thereby realizing the clamping of the single-hole steel The clamping of strands, this anchoring method has the following defects: first, manual operation is time-consuming and laborious; second, during the fatigue test of the anchored steel strands, the clip often slips out due to insufficient artificial percussion force , causing the fatigue test to fail; third, due to the unevenness of the sub-clamps due to the improper adjustment of the sub-clip gap, the uneven force on the steel strands caused the fracture of the meshing parts of the clips, resulting in the failure of the fatigue test

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