Clamping device for butt welding of steel pipes

Abstract

The invention relates to a metal pipe orifice butting device, in particular to a clamping device for the butt welding of steel pipes. The clamping device comprises a frame body, a nut, a screw rod, anupper clamping slot, a lower clamping slot, a motor, a lifting platform and walking wheels, wherein the nut is fixed at the upper end of the frame body; the lower clamping slot is fixed at the lowerend of the frame body; one end of the screw rod is connected with the motor; the other end of the screw rod is connected with the upper clamping slot; a screw thread is arranged at the middle of the screw rod; the middle of the screw rod is matched and connected with the nut through the screw thread; the motor is fixed on the frame body; the frame body is fixed on the lifting platform; the walkingwheels are arranged at the bottom of the lifting platform; the two steel pipes which need to be butt welded are placed between the upper clamping slot and the lower clamping slot; the screw rod and the upper clamping slot are driven by the motor to move down; and the steel pipes are clamped and fixed through the upper clamping slot and the lower clamping slot. By adoption of the clamping device,the equilibrium of staggered pipe welding joint gaps can be effectively improved; furthermore, the reasonable distribution of butt welding joint gaps can be guaranteed, and then the welding quality can be remarkably improved; and after the welding is finished, the steel pipes can be kept in one and the same straight line and protected against deformation.

Description

Technical field [0001] The invention relates to a butt-welding device for metal pipelines, in particular to a steel pipe butt welding clamping device. Background technique [0002] Pipe connection refers to the connection of prefabricated pipe sections into a complete system according to the requirements of the design drawings. During construction, different connection methods should be selected according to the material of the pipe used. Ordinary steel pipes have threaded connection, flange connection, welding connection, socket connection, pipe bonding connection and other methods. Welding connection is the most commonly used connection method in pipeline connection. The ports of two pipelines are aligned, and then the periphery of the counterpart is welded. [0003] "Industrial Metal Piping Engineering and Acceptance Specification" GB50235-2010 stipulates that the group of pipe butt welds should be flush with the inner wall, and the amount of inner wall deviation is 0.5MM~2MM....

AI Technical Summary

Problems solved by technology

At present, due to the lack of a special clamping device in the construction process of butt welding of steel pipes, the two steel pipes that need to be butt welded can only be fixed manually, which is time-consuming and laborious, and the pipes cannot be fixed effectively, and the gap between the joints cannot be uniform, so the welding quality Unable to guarantee, the misalignment of the inner wall is difficult to meet the acceptance standard

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