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321results about How to "Reduce distortion" patented technology

Anti-deformation assistive tool for welding thin-wall box bodies

An anti-deformation assistive tool for welding thin-wall box bodies comprises an inner fixing frame and an outer clamp. The inner fixing frame comprises a box body, movable pressing blocks and adjusting bolts. Two adjacent faces of the box body are respectively connected with one movable pressing plate through the adjusting bolts, and by means of adjusting the adjusting bolts, relative distance between the movable pressing blocks and connecting faces of the box body where the movable pressing blocks are located can be adjusted. The two movable pressing blocks and the other two faces of the box body jointly form supporting for two lateral walls of the inner cavity of a thin-wall box body. The outer clamp comprises a cramp frame and a movable handle pressing bolt, the cramp frame is clamped outside two opposite lateral walls of the thin-wall box body, the movable handle pressing bolt is connected on one clamping finger of the cramp frame, a bolt head part of the movable handle pressing bolt is pressed on the lateral wall of the thin-wall box body. The anti-deformation assistive tool for welding the thin-wall box bodies utilizes the adjustable supporting to fix shape and position of the inner cavity in the box body, enables size of a supporting face and the size of the inner cavity of the box body to be consistent through the adjusting bolts, and then utilizes the external clamping, thereby enabling the box body to be stable in structure, effectively reducing deformation during welding, overcoming the shortcomings that in the prior art, only external clamping is utilized, and deformation of shape dimension contracting during cooling after welding can not be controlled, and welding quality of products is improved.
Owner:重庆大江智防特种装备有限公司

Subway shield tunnel enlarging station special area and station structure connecting method

The invention provides a connecting method for connecting special duct pieces and a station structure in a subway shied tunnel extended station. The connecting method solves key problems that a station is built in subway regional shield extended construction process from aspects such as the constitution of the duct pieces, the assembly mode of the duct pieces, the connecting joint between the duct pieces and the station structure, etc. Through strengthening reinforcing bars, greater internal force born by the shield tunnel duct pieces in the process that the station is built by extension is satisfied, thereby guaranteeing the safety of the duct pieces; and after local duct pieces are removed, steel plates and steel reinforcement connectors are pre-embedded through straight-joint assembly and connected conveniently with the station structure, so that the connecting joint has enough rigidity to transfer axial force, bending moment and shearing force, the distortion of the joint is reduced, waterproofing processing to the joint can be effectively carried out, and the connection problem that the high-rigidity main structure of the station is connected with the high-flexibility structure of the duct pieces is solved. The shape of the special shield duct pieces are consistent with the shape of common subway regional tunnel shield duct pieces, so the same mould which is either applied to the special shield duct pieces or the common subway regional tunnel shield duct pieces can be used for production.
Owner:BEIJING URBAN CONSTR DESIGN & DEV GRP CO +2

Building displacement turning method

ActiveCN102720373AAvoid additional internal forceReduce distortionBuilding repairsEngineeringMechanical engineering
The invention discloses a building displacement turning method. The building displacement turning method comprises the following steps: (1) pouring and manufacturing a turning front displacement railway, a turning rear displacement railway and a turning front support exchanging beam before the displacement on a building which needs to turn; (2) cutting off a column or a wall from a foundation so as to transfer to the turning position through a traction or pushing gear; (3) paving steel rolling shafts on the turning rear displacement railway, and supporting a channel steel on a steel rolling shaft to be used as a bottom template to pour and manufacture the turning rear support exchanging beam; (4) cutting the channel steel adjacent to the rolling shaft arranged below the turning front support exchanging beam, taking out the rolling shafts, changing the transmission pipeline of the building load from the displacement front support exchanging beam, the displacement front rolling shafts and the displacement front railway to the displacement rear support exchanging beam, the displacement rear rolling shafts and the displacement rear railway; and (5) installing the traction or pushing gear after displacement, and continuing with the displacement. The building displacement turning method provided by the invention does not need a lifting jack to jack to complete the rolling shafts turning, thereby avoiding additional internal force generated by jack deformation; the rolling shafts are paved on a turning rear railway so as to manufacture a turning rear support exchanging beam, the beam bottom deformation is small, the flatness is high, and the building displacement turning method is beneficial for displacement.
Owner:SHANDONG JIANZHU UNIV
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