Spinning purging device for inner wall of steel pipe

Abstract

The invention discloses a spinning purging device for the inner wall of a steel pipe. The spinning purging device comprises a lead screw lifting device, a three-way cavity and a spinning nozzle device; the spinning nozzle device is connected with the lead screw lifting device through the three-way cavity; the spinning nozzle device comprises a rotary sleeve, a turntable and a nozzle; the nozzle comprises an air spray head, an inner screw joint and a bent pipe rod; one end of the bent pipe rod is fixedly connected with the air spray head through the inner screw joint, and the other end of the bent pipe rod is provided with a thread matched with a mounting hole of the turntable; the included angle of two end faces of the bent pipe rod is 120 degrees; and the mounting included angle between the air spray direction of the nozzle and the axis of the turntable is 0 to 90 degrees. By reasonably arranging the number and the angle of the nozzle, using the purging reacting force of compressed air and adjusting the flow rate and the pressure of the compressed air, the spinning speed is controlled, and the purpose of full-area purging of the inner wall of the steel pipe is fulfilled; a power source such as an electromotor or a motor or the like is not needed, so the energy consumption is reduced; and the spinning purging device is simple in integral structure and light in weight, and reduces the load of a cantilever.

Description

technical field [0001] The invention relates to a purging device for the inner wall of a steel pipe, in particular to a spin-type purging device for the inner wall of a steel pipe to achieve spin purging through the reaction of compressed air. Background technique [0002] With the rapid development of oil and natural gas industry and urban pipeline network, various oil and gas pipelines have started construction one after another, and the requirements for steel pipes are also increasing. In the production enterprises of straight seam submerged arc welded pipes, welding quality is the key to the quality control of straight seam steel pipe products, and for the control of welding quality, in addition to the guarantee of welding equipment and welding process, the cleanliness of the weld groove is one of the key points of welding quality control important link. Since most domestic LSAW pipe enterprises are far away from steel mills, the required steel plates need to be transpo...

AI Technical Summary

Problems solved by technology

In the existing dust removal and blowing device for cleaning the inner wall of the steel pipe, the cleaning of the inner wall is not comprehensive enough, or due to the change of the inner wall of the steel pipe, the purging of the entire inner pipe wall cannot be achieved, so that some impurities on the inner wall of t...

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