Nut pre-tightening machine for engineering construction

Abstract

The invention relates to the field of equipment application of engineering construction, and particularly relates to a nut pre-tightening machine for engineering construction. The nut pre-tightening machine comprises a bottom frame, a driving roller set, a driven roller set, a tensioning device, a supporting device, a transmission belt and a shell, wherein the driving roller set and the driven roller set are symmetrically arranged on the bottom frame; the tensioning device is arranged on the bottom frame and located between the driving roller set and the driven roller set; the supporting device is arranged on the portion, on one side of the tensioning device, of the bottom frame; the transmission belt sequentially penetrates the driving roller set, the driven roller set and the tensioningdevice; and the shell is connected to the bottom frame. According to the nut pre-tightening machine, a nut is extruded on a belt of the supporting device through the transmission belt, the transmission belt continuously moves so as to drive the nut to rotate downwards, and the nut can be automatically and rapidly tightened.

Description

technical field [0001] The invention relates to the equipment application field of engineering construction, in particular to a nut pre-tightening machine for engineering construction. Background technique [0002] It is inevitable that nuts will be used for assembly in engineering construction, such as the fixed installation of the base of the wind turbine. During construction, large-scale hoisting machinery and equipment are used for assembly. High-strength bolts are pre-buried on the base of the tower installation. After the tube is hoisted, move slowly and gradually align the bolt holes on the bottom flange of the tower with the bolts, and then drop the tower. After the bolts pass through the bolt holes, the nuts need to be screwed onto the bolt posts. Due to the distance between the bolts and the tower wall, Closer, it is difficult to tighten the nut with a traditional tool, and electric tools such as jackhammers cannot align the nut coaxially with the bolt due to insuf...

AI Technical Summary

Problems solved by technology

[0002] It is inevitable that nuts will be used for assembly in engineering construction, such as the fixed installation of the base of the wind turbine. During construction, large-scale hoisting machinery and equipment are used for assembly. High-strength bolts are pre-buried on the base of the tower installation. After the tube is hoisted, move slowly and gradually align the bolt holes on the bottom flange of the tower with the bolts, and then drop the tower. After the bolts pass through the bolt holes, the nuts need to be screwed onto the bolt posts. Due to the distance between the bolts and the tower wall, Closer, it is difficult to tighten the nut with a traditional tool, and electric tools such as jackhammers cannot align the nut coaxially with the bolt due to insufficient space. At the same time, the nut size of the tower is much larger than the general nut. There is no special nut tightening tool. The existing processing method is that the worker sticks a belt on the nut, and the worker pulls the belt back and forth with both hands to drive the nut down, and then tightens each bolt to the set value with a torque wrench. torque value

This kind of working method in which the operator uses the belt to rotate the nut not only has low work efficiency and a large workload, but also increases the labor intensity of the staff.

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