The uncoiler, also known as the unwinding machine, is the core pre-supporting equipment for the spiral welded pipe production line. As the first process equipment of the spiral welded pipe machine unit, it is mainly used to steadily and uniformly unwind coiled hot-rolled steel strips, cold-rolled steel strips and other metal steel coils. It continuously supplies raw materials for the forming, welding, fixed-length cutting and other processes of spiral welded pipes. It is an indispensable starting unit of the complete spiral welded pipe production line of Taiyuan Jintong Heavy Industry, which directly determines the operation continuity of the entire spiral welded pipe machine unit and the quality of finished welded pipes.

            The uncoiler adopts a heavy welded box-type frame structure with high rigidity and strong impact resistance, which can bear the huge load brought by heavy steel coils and avoid deformation and vibration during long-term continuous operation. The core components of the equipment include an expanding reel, main transmission system, braking system, steel strip deviation correction mechanism, steel coil supporting device and supporting electric control system. All modules work together to ensure stable feeding of thespiral welded pipe production line. As the core bearing component, the expanding reel is hydraulically driven to expand and contract, which can adapt to steel coils with different inner diameters, firmly support the inner ring of steel coils, prevent steel strip slipping and shifting during production, and meet the strict requirements of the spiral welded pipe machine for steel strip feeding stability.

              In terms of working principle, the uncoiler matched with the spiral welded pipe machine by Taiyuan Jintong Heavy Industry adopts a variable-frequency speed regulating motor matched with a reduction gearbox to provide power, driving the main shaft and reel to rotate to complete steel strip uncoiling and feeding. Equipped with a closed-loop tension control system, the equipment cooperates with sensors to monitor the tightness of the steel strip in real time and automatically match the forming and conveying speed of the spiral welded pipe production line. When the forming section of the spiral welded pipe machine decelerates or stops temporarily, the braking system quickly locks the reel and offsets the inertia of the steel coil through braking force, avoiding excessive steel strip discharging and preventing steel strip slack, wrinkles and tensile deformation. During the normal continuous operation of the production line, the steel strip is discharged at a constant speed with constant tension and straight feeding, fundamentally reducing forming defects such as misalignment and pipe size deviation of spiral welded pipes.

               According to production capacity specifications, uncoilers supporting spiral welded pipe production lines are divided into semi-automatic hydraulic uncoilers and fully automatic heavy-duty uncoilers. Small and medium-sized spiral welded pipe machines mostly adopt semi-automatic models, which realize manual auxiliary coiling, hydraulic tensioning and variable-frequency speed regulating feeding, suitable for the production of small and medium-sized steel pipes. The fully automatic heavy-duty uncoiler has a higher degree of automation, supporting automatic feeding by hydraulic trolley, automatic reel expansion and contraction, automatic steel strip deviation correction and adaptive tension adjustment. It can carry heavy steel coils of dozens of tons and is suitable for large-scale production of large-diameter thick-wall spiral welded pipes. The side deviation correction device corrects the left and right offset of the steel strip in real time to ensure the steel strip is sent into the former of the spiral welded pipe machine at an accurate angle, which is a key link to control the forming quality of spiral welds.

              The uncoiler of Taiyuan Jintong Heavy Industry is specially designed for spiral welded pipe production lines, widely used in the production of spiral submerged arc welded pipes such as oil and gas transmission pipes, municipal water supply and drainage pipes and steel structure pipe piles. Relying on the continuous steel strip supply of the uncoiler, the entire spiral welded pipe machine unit replaces manual uncoiling and feeding, solving the problems of uneven feeding speed, steel strip scratches and high safety risks caused by manual operation, and improving the automation level and production efficiency of the whole spiral welded pipe production line.

             The uncoiler matched with the spiral welded pipe machine by Taiyuan Jintong Heavy Industry has strong bearing capacity, wide speed regulation range, low operating noise and durable structure, supporting long-term uninterrupted continuous production. Standardized models are compatible with steel strips of different widths and thicknesses, with strong compatibility, taking into account the uncoiling of thin-wall and thick-wall steel strips. It ensures stable discharging of the spiral welded pipe production line and serves as the key first equipment for manufacturing high-quality spiral welded pipes.