Single-girder crane in the rolling mill: a "heavy-duty precision hand" in high-temperature dust, ensuring zero-stuttering hoisting of the rolling line
Single-girder overhead cranes in the rolling mill: "Heavy-load precision" in high-temperature dust, ensuring zero-stutter lifting during rolling mill installations
Amid the intense flames and swirling dust of the rolling mill, lifting steel is a life-or-death test. Traditional overhead cranes are prone to malfunction due to heat, dust can cause precision loss, and heavy-load swaying poses a significant safety threat. Billet unhooking and roll misalignment can lead to production downtime and the risk of accidents.
Single-girder overhead cranes specifically designed for rolling mills, with their core performance of "heat-resistant and dust-resistant, heavy-load stable and accurate," provide an "industrial-grade defense" for rolling mill installations.
Technical Parameters:
| Lifting Capacity | 5t, 10t, 15t, 20t (suitable for heavy-load lifting of steel billets, rolls, etc.) |
| Breaking Safety Factor | ≥4 times rated load (G80 hook + main beam collaborative protection) |
| Span | 7.5 m~22.5 m (matching the layout of the steel rolling workshop, customizable) |
| Lifting Speed | Fine-tuning mode: 0.5-3 m/min (roller alignment, hot billet lifting); High-efficiency mode: 3-10 m/min (bill transfer, finished product loading and unloading), supports variable frequency drive speed regulation |
1. No "Weakness" in High Temperatures: A "Steel Backbone" in 60°C Environments
The Q355B high-temperature-resistant manganese steel single-girder bridge frame, after high-temperature aging treatment, exhibits a mechanical performance degradation of ≤5% in environments above 60°C. Its deadweight is 30% lighter than traditional double-girder overhead cranes, making it easily adaptable to the complex layout of rolling mills, conveyor rollers, and other equipment. Retrofitting existing workshops requires no additional reinforcement of the steel beams.
The motor is equipped with a forced air cooling system, improving heat dissipation efficiency by 40%. It can operate continuously at full load for 8 hours without downtime, perfectly supporting the continuous pace of the rolling mill line.
2. No "Stuck" in Dust: Penetrating Heavy Pollution with Millimeter-Level Precision
The fully enclosed gearbox and dust-proof guide rail cover keep out dust such as iron oxide scale and iron powder, reducing operational failure rates by 60%, addressing the pain points of traditional overhead cranes, which often experience stuck every three days and need repairs every five days. Equipped with a variable-frequency anti-sway motor and laser positioning, the lifting speed is steplessly adjustable from 0.5 to 10 m/min, with a hoist swing of ≤3 mm. The alignment accuracy for billet docking at the mill entrance and roll replacement is ±2 mm, reducing rolling line downtime for roll changes by 40%.
III. No "swaying" under heavy loads: Rock-solid lifting of 20 tons
The main beam is shot-peened and coated with a wear-resistant coating, achieving a tensile strength of 500 MPa. Equipped with a G80-grade forged hook and a dual braking system, it has a rated lifting capacity of 5 to 20 tons and a breaking force of ≥4 times the rated load. It can lift 15 tons of billets and 8 tons of rolls without a ripple.
To address the urgent start-stop conditions of steel rolling, an overload warning device is installed. If the load exceeds 90%, the machine is automatically decelerated, and if it exceeds 110%, the machine is immediately locked, eliminating overload risks at the source.