Large-specification bolt fastening device and fastening method

Abstract

The invention provides a large-specification bolt fastening device. The large-specification bolt fastening device comprises a chuck, force arms and a power unit, wherein a hole matched with a nut forfastening a bolt is formed in the center of the chuck; even number of force arms are uniformly distributed on the outer circumference of the chuck, and through holes are formed in the outer ends of the force arms; and a force arm lifting unit and a force arm pull-down unit are arranged around the chuck and located on the two sides of the outer ends of the pair of horizontal force arms respectively, and the outer ends of the force arms are connected to the power unit through flexible connecting bodies penetrating through the force arm lifting unit and the force arm pull-down unit. The inventionfurther provides a large-specification bolt fastening method. According to the large-specification bolt fastening device, the power unit is used for driving the force arms on the chuck to rotate to fasten the nut of the bolt, the device is simple in structure and can be suitable for narrow space operation and large-specification bolt fastening, the labor intensity of personnel is relieved, and the working efficiency is improved.

Description

technical field [0001] The invention belongs to the field of electromechanical equipment installation, and specifically relates to a large-size bolt fastening device and fastening method, which are suitable for industrial engineering in various industries. Background technique [0002] Bolts are common mechanical parts in electromechanical equipment. Larger specification bolt fastening work is also very common in electromechanical installation engineering. In the past, we mainly used three methods for bolt fastening: heating method, torque wrench and hydraulic tensioner. Among them, the heating method requires bolts to be designed and manufactured with heating holes. When heating on site, it is not only time-consuming, but also low in operating efficiency. ;Due to the limitation of the maximum torque, the torque wrench can basically only be used for tightening bolts below M80; the hydraulic tensioner has a wide range of applications in terms of bolt specifications, but beca...

AI Technical Summary

Problems solved by technology

In the past, we mainly used three methods for bolt fastening: heating method, torque wrench and hydraulic tensioner. Among them, the heating method requires bolts to be designed and manufactured with heating holes. When heating on site, it is not only time-consuming, but also low in operating efficiency. ;Due to the limitation of the maximum torque, the torque wrench can basically only be used for tightening bolts below M80; the hydraulic tensioner has a wide range of applications in terms of bolt specifications, but because of its heavy weight, when the operating space is narrow, use a crane Difficult to use when it cannot be hoisted in place or has no room to operate at all

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