A hydraulic single cylinder tensioner

Abstract

The invention discloses a hydraulic single-cylinder tension device. The hydraulic single-cylinder tension device comprises a base, a connecting rod, a cylinder body, a piston, a support base, a top screw nut, a bottom screw nut and an anchor rod, wherein the base penetrates through the anchor rod and is arranged on surrounding rock; the upper end of the base is provided with a flange; the bottom part of the cylinder body is connected with the base through the flange in a matching way; the piston is arranged in the cylinder body; a cavity is formed between the piston and the cylinder body; the cylinder body is provided with an oil inlet, the piston is provided with an oil outlet, and the oil inlet and the oil outlet are respectively communicated with the cavity; the bottom screw nut is arranged on the anchor rod, the tail part of the anchor rod is fixedly connected with one end of the connecting rod, the other end of the connecting rod is fixedly connected with the support base, and the support base is positioned at the upper end of the piston; the connecting rod is tightened by the top screw nut. The hydraulic single-cylinder tension device has the advantages that the tension device is suitable for the quick tension of the anchor rods with different exposing lengths in the narrow operation space, the working efficiency is improved, the tension requirement of the anchor rod is decreased, and the transverse instability of the hydraulic double-cylinder tension device is avoided.

Description

technical field [0001] The invention relates to a bolt support tensioning device, in particular to a hydraulic single-cylinder tensioner. Background technique [0002] In the field of construction engineering, more and more prestressed anchors and high-strength bolts are directly prestressed by tensioning. This method of prestressing is more accurate and safer than torque wrench. It does not need to measure the torque coefficient. Moreover, it can be stretched and disassembled multiple times, reused, and is suitable for the prestressing of anchor rods and high-strength bolts of various specifications, especially large-diameter specifications. Most of the hydraulic tensioner patents that have been inquired are hydraulic double-cylinder tensioners. Once the prestress on both sides is different, lateral instability will occur, and the volume and structure are large. In some places where the operating space is narrow, it is impossible to control high-strength The bolt is tensio...

AI Technical Summary

Problems solved by technology

Most of the hydraulic tensioner patents that have been inquired are hydraulic double-cylinder tensioners. Once the prestress on both sides is different, lateral instability will occur, and the volume and structure are large. In some places where the operating space is narrow, it is impossible to control high-strength bolts in tension

The currently used bolt tensioner requires a longer exposed length of the bolt, resulting in a waste of bolt material and low economic efficiency

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