Construction Method For Spiral Silos

Construction Method for Spiral Silos

Lipp-type steel silos, also known as spiral steel silos, are constructed by spirally rolling the silo body using a spiral forming unit. Currently, domestic Lipp silos are manufactured by interlocking rolled plates with a spiral forming unit, which includes: a decoiler, a flanging machine, a forming machine, a triangular lifting boom, and electrical controls. The coil forming machine primarily comes in two specifications: SM30 and SM40. The SM30 is suitable for silo diameters ranging from 3 to 8 meters, while the SM40 is suitable for diameters ranging from 6 to 18 meters.

Construction Method for Spiral Flanged Steel Plate Silos

Determine the center point and circumference line;

Set up the forming machine and bending machine between silos;

Level the frame and support structure;

Feed the coil into the forming machine for shaping; Use the bending machine to form spiral ribs with a pitch equal to 5 times the silo wall thickness; When the silo reaches 2m in height, cut the coil flat using an automatic cutter; Fabricate and install the silo roof; Continue rolling the silo to full height using the bending and forming machines; Weld internal stiffeners according to the drawings; Cut the lower section of the silo flat using a cutter; Reverse-rotate the silo onto its foundation and lower it onto the embedded steel plates; connect the reinforcing ribs to the embedded plates for anchoring.

Steel plate silos feature light self-weight, minimal foundation requirements, compact footprint, labor savings, and low costs. They can also incorporate double-wall panels by integrating inner and outer walls with two distinct materials, further reducing construction expenses. Additionally, steel silo construction is largely unaffected by seasonal or weather conditions, enabling rapid economic returns for users. Actual calculations show that compared to reinforced concrete silos of equivalent capacity, steel silos require nearly the same amount of steel but consume approximately two-thirds less cement. while cement usage is reduced by approximately two-thirds. Concrete silos require higher foundation costs and total investment due to their weight and height requirements, typically exceeding steel silos by 15% to 40%. Prefabricated steel silos offer large storage capacity, high levels of mechanical automation, and management that tends toward scientific, rational, and networked approaches, effectively reducing operating costs. Additionally, they allow for partial disassembly and replacement, making operation convenient. For equivalent storage capacity, concrete silos feature smaller diameters, greater heights, and relatively higher grain layer depths, making grain management challenging. Issues include: difficulty in obtaining representative grain quality samples from various locations within the grain layer, etc.). Maintenance is challenging, particularly after prolonged use, as cracks and damage to insulation and moisture-proof layers often occur, making repairs difficult and maintenance even more arduous.