Fastening spanner for large-diameter and high-strength bolt and use method thereof

Abstract

The invention relates to the field of fastening members with heads or rods having special shapes when the connection of an object adopts a bolt connection mode, in particular to a fastening spanner for a large-diameter and high-strength bolt and a use method thereof. The fastening spanner for the large-diameter and high-strength bolt comprises a base plate (1) and is characterized in that a screw cap hole (2) is arranged at one end of the base plate (1) and is a regularly-hexagonal hole; and a connecting hole (3) is arranged at the other end of the base plate (1) and is a round hole. The use method of the fastening spanner for the large-diameter and high-strength bolt is characterized in that the screw cap hole (2) on the base plate (1) is sleeved outside the screw cap of the bolt and is screwed; a sleeve (4) is sleeved outside one end of the connecting hole (3) of the base plate (1) and is screwed; and the sleeve is taken down and a chain block (5) is started for continuously screwing the bolt. The invention has the advantages of wide application range, high construction quality, simpleness in operation, safety and reliability.

Description

technical field [0001] The invention relates to the field of fastening components with special-shaped heads or rods when objects are connected by bolts, in particular to a fastening wrench for large-diameter high-strength bolts and its use method. Background technique [0002] The wheel-spoke tension structure system is a fully tension structure derived from the concept of wheel spokes. The structure is composed of outer ring beams, support columns, flexible cable trusses and inner rings. The outer ring beam is a The space curved beam, the outer ring beam is connected by the compression ring box girder one by one through the flange. The support column under the outer ring beam bears the tensile force; the flexible cable truss is arranged in the upper and lower chords, which is concave in shape, and is composed of flying columns, upper and lower chord cables and vertical cables connecting the upper and lower chords. The flying columns adopt circular steel pipe cross-sections;...

AI Technical Summary

Problems solved by technology

A large number of high-strength bolts are needed in the spoke-type tension structure system. The high-strength bolts are all located at the flange end plate of the compression ring box girder. The high-strength bolts have large specifications, with a nominal diameter of up to 36mm. The construction torque is relatively large, and a high-standard torque wrench is required; The force between the flange end plates is mainly supported by high-strength bolts, so higher requirements are placed on the quality of production and installation of high-strength bolts; due to the high-altitude operation on site, the operating platform is limited, and conventional manual screwing is difficult and dangerous

At present, a torque wrench for testing is usually used. This kind of torque wrench has a large weight and a long length, and the connection of the flange end plate of the compression ring box girder is used for high-altitude operations. The screwing of bolts is difficult

At present, in the design stage of steel structure engineering, in order to reduce welding deformation and welding residual stress, the use of high-strength bolts has been increased. The application of super-large-diameter high-strength bolts is becoming more and more extensive. Most of them need to be installed at high altitudes, and the screwing is difficult. Big security risk

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