Complete device of spiral corrugated steel pipe and method for producing spiral corrugated steel pipe

Abstract

The invention discloses a complete device of a spiral corrugated steel pipe and a method for producing the spiral corrugated steel pipe. In the existing method for making the spiral steel pipe, the widely-adopted steel pipe is a spiral steel pipe formed by welding, the general diameter of the spiral steel pipe is less than 630mm, and the plate thickness of the spiral steel pipe is 3-5mm. The complete device disclosed by the invention comprises a decoiling machine (1), the outlet of the decoiling machine (1) is connected with the inlet of a roll forming machine (2), the outlet of the roll forming machine (2) is connected with the inlet of a forming machine (3), the outlet of the forming machine (3) is connected with the inlet of a transition bracket (4), the outlet of the transition bracket (4) is connected with the inlet of a cutting saw (5), the outlet of the cutting saw (5) is connected with the inlets of four sets of turnover brackets (6), the outlets of the turnover brackets (6) are connected with the inlet of a conveying bracket (7), the outlet of the conveying bracket (7) is connected with the inlet of an end modification device (8), and all operations above are controlled by a control console (9). The complete device disclosed by the invention can be used in large-diameter and thick-walled corrugated pipes for drain pipes, sludge discharge pipes, shaft pipes, bridge / culvert pipes, and ventilation ducts.

Description

Technical field: [0001] The present invention relates to a kind of equipment and production method used in the production of drainage pipes, sewage pipes, wellbore pipes, bridge culvert pipes and ventilation pipes, in particular to a method for producing spiral corrugated steel pipes with the complete set of equipment for said spiral corrugated steel pipes. Background technique: [0002] The existing manufacturing methods of spiral steel pipes are widely used as welded spiral steel pipes, which are rolled and pushed by steel strips, spirally curled into circles, and formed by online welding. Generally, the diameter is less than 630mm, and the thickness is 3mm~ 5mm. [0003] The other is the spiral steel pipe formed by occlusion, which is a flat-walled spiral steel pipe formed by rolling the steel strip, spirally curled into a circle, and formed by occlusion, or spirally curled into a circle, and then pressurized and strengthened in a ring shape. The ribbed spiral steel pipe...

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Problems solved by technology

[0004] In the prior art method, when the diameter of the welded spiral steel pipe is more than 2000mm, the forming method and equipment are difficult to realize, and the increase in plate thickness leads to an increase in manufacturing cost; the plate thickness of the welded spiral steel pipe is less than 1mm. In the field of municipal engineering, large-diameter (2000mm or larger) sewage pipes and drainage pipes are required to be buried underground, and pipes are required to have high ring stiffness to resist external loads

[0005] The corrugation forming method and equipment introduced in the utility model patent ZL03214726.0 has such a problem. It processes and shapes the steel pipe first, and then uses a special corrugation forming machine to press the flat pipe wall of the steel pipe into a corrugated pipe wall. The shape of the wall structure is circular corrugation, this equipment can only be used as a secondary forming corrugation, and cannot be continuously produced simultaneously with the pipe online

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