Strengthened steel pipe with rib spirally wound as well as special equipment and method for manufacturing preparing strengthened steel pipe

Abstract

The invention belongs to the technical field of pipelines, and discloses a steel pipe reinforced with spirally wound ribs, special preparation equipment and a preparation method thereof. Its main technical scheme is: including a pipe body, the pipe body is composed of a large steel strip that is spirally rolled and welded, the outer wall of the pipe is spirally wound and welded with structural wall reinforcement ribs, and the structural wall reinforcement ribs are formed by rolling into a structural wall Constructed of small steel strips that are helically wound after the shape. During manufacture, the large steel strip is preformed into a pipe body, the small steel strip is preformed into a spiral reinforced rib, and the spiral reinforced rib is placed on the pipe body on the combined forming unit, and is pressed by a limit rolling wheel and continuously or Intermittent welding. Spiral welds, structural wall ribs, and welded joints greatly increase the ring stiffness and bearing strength of the pipe, and the wall thickness of the pipe body is significantly reduced. It is especially suitable for negative pressure pipelines and positive pressure liquid pipelines with low pressure bearing capacity. Can also be used in positive pressure gas delivery lines.

Description

technical field [0001] The invention belongs to the technical field of pipelines, and specifically discloses a steel pipe reinforced with spirally wound ribs and special preparation equipment and a preparation method thereof. Background technique [0002] At present, the pipes used for gas drainage underground in the coal mine industry mostly use steel mesh skeleton polyethylene pipes, steel pipes, steel plastic-coated pipes, and steel-lined plastic pipes. The use of steel mesh skeleton polyethylene pipes has been verified by the market. Since the raw materials used need to add materials such as carbon black and red phosphorus to achieve antistatic and flame retardant properties, brittle cracking of the pipes is more common. Now many mining bureaus It has been expressly prohibited to use; steel pipes, especially pipes with larger diameters, have thicker wall thicknesses, and their ring rigidity and strength performance indicators far exceed the performance required for their...

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Problems solved by technology

The use of steel mesh skeleton polyethylene pipes has been verified by the market. Since the raw materials used need to add materials such as carbon black and red phosphorus to achieve antistatic and flame retardant properties, brittle cracking of the pipes is more common. Now many mining bureaus It has been expressly prohibited to use; steel pipes, especially pipes with larger diameters, have thicker wall thicknesses, and their ring rigidity and strength performance indicators far exceed the performance required for their use, resulting in waste of materials, and Steel pipes are heavy, difficult to install, and expensive; plastic-coated steel pipes and plastic-lined steel pipes use steel pipes as the body material, which also has the problems of waste of materials, difficulty in installation, and high costs

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