The production equipment for spiral welded pipe typically consists of an uncoiler, leveler, shearer, disc shear, feeder, guide plates, former, internal and external welding machines, plasma cutting machine, among others.
Uncoiler: During operation, the steel strip is placed on support rollers, which rotate to drive the steel strip. A cone head cylinder clamps the steel strip to stabilize it, and a shovel head opens the leading end of the strip, realizing the uncoiling process.
Leveler: It feeds and levels the steel strip from the uncoiler. The pinch rolls and leveling rolls are driven by a motor-powered gearbox connected via universal joints for fully automatic leveling. The leveling rolls are arranged in a four-above-three configuration. To enhance leveling capabilities, support rolls are placed above and below the leveling rolls. A clutch is installed in the drive motor section, which opens when the steel strip is fed to the feeder, enabling passive leveling.
Shearer: Primarily used to cut the head and tail sections of the steel strip. During continuous production, these sections often cannot be directly used for welding into spiral welded pipes due to various reasons (e.g., non-standard dimensions, poor surface quality). Therefore, the shearer accurately removes these defective parts to ensure smooth subsequent welding processes.
Disc Shear: Continuously shears the steel strip using the shearing force generated by two circular cutting blades, one above and one below.
Feeder: In the production of spiral seam double-sided submerged arc welded pipes, the feeder provides the driving force for the entire unit. It facilitates the entire process from uncoiling to forming of the steel strip.
Guide Plates: Their primary function is to stabilize and guide the steel strip. Through their design, guide plates ensure that the steel strip maintains a smooth trajectory during transportation, preventing deviations or fluctuations.
Former: Converts the steel strip into a spiral-shaped pipe billet. This is the first and most critical step in spiral welded pipe production. The former gradually winds and presses the steel strip into a spiral-shaped pipe billet through its specific structure and working principle.
Internal and External Welding Machines: The internal welding machine performs double-sided welding on the spiral seam of the pipe billet formed by the spiral winding process at ambient temperature.
Plasma Cutting Machine: Known for its speed and efficiency, the plasma cutting machine is used to sever the steel pipe from the continuous production line when it reaches a certain length (e.g., 8-12 meters). Plasma cutting swiftly accomplishes this task, ensuring production line continuity and efficiency.
