An automatic reset device and a butt joint method for welded liners at the butt joints of steel trusses

Abstract

The invention discloses an automatic reset device for a welding packing at a closure joint of a steel truss. The automatic reset device comprises a positioning plate, a welding backing and a welding backing positioning plate fixedly connected with the welding backing; a positioning rod press head is arranged at one end of the positioning rod; the other end of the positioning rod penetrates through the welding backing positioning plate and the positioning plate in sequence and is then fixedly locked by a nut; a spring sleeves the positioning rod; two ends of the spring are respectively abutted against the welding backing positioning plate and the positioning plate; a welding backing cylindrical pin is fixed on the welding backing positioning plate. The invention also discloses a jointing method for performing steel truss closure by using the automatic rest device for the welding backing at the closure joint of the steel truss. The automatic reset device is simple in structure, low in cost, convenient to operate and capable of ensuring the jointing welding quality of the steel pipe truss.

Description

technical field [0001] The invention relates to the technical field of building truss closing joints, in particular to an automatic reset device for welded liners at the joints of steel trusses, and also relates to a method for jointing joints of steel pipe trusses in the air, which is suitable for construction of steel pipe (round or square) trusses Aerial Helong Welded Pad Assembly. Background technique [0002] According to "Building Steel Structure Welding Technical Regulations JGJ81", the on-site butt welding of steel structure steel pipe members is generally full penetration groove welding (with welding backing), the welding gap is generally 6~10mm, and the groove angle is generally 30~45° , when a truss is finally closed, the assembly of the welded liner in the butt joint steel pipe becomes a difficult problem for the construction personnel on site. If it is assembled in place first, there will be no gap during installation, and the butt joint will be difficult; if no...

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Problems solved by technology

[0002] According to "Building Steel Structure Welding Technical Regulations JGJ81", the on-site butt welding of steel structure steel pipe members is generally full penetration groove welding (with welding backing), the welding gap is generally 6~10mm, and the groove angle is generally 30~45° , when a truss is finally closed, the assembly of the welded liner in the butt joint steel pipe becomes a difficult problem for the construction personnel on site. If it is assembled in place first, there will be no gap during installation, and the butt joint will be difficult; if not When the installation is in place, the welding liner in the steel pipe cannot be adjusted when it is closed. There is a certain gap, and the welding quality is not easy to guarantee.

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