The furnace is the core component of the boiler in a thermal power plant, and the water-cooled wall and superheater tube bank are key heating elements inside the furnace. They operate under high temperature and high pressure conditions for a long time and are prone to problems such as wear, corrosion, or leakage, which require timely maintenance and replacement. In the welding operation of single or small batch tube rows in the furnace, the chain hoist, with its advantages of small size, flexibility, and controllable force, has become a key auxiliary tool for tube row suspension and alignment, ensuring accurate and efficient welding operations.
The internal space of the furnace is narrow and the working conditions are complex. The installation accuracy of the tube bank is extremely high, and the clearance and misalignment must strictly comply with the standards, otherwise it will affect the welding quality and the service life of the tube bank. The chain hoist can be flexibly fixed according to the job position, accurately suspending the pipe row. By adjusting the length of the chain, the pipe row can be adjusted to the appropriate height and angle, ensuring that the pipe row interface is aligned and the gap is uniform, effectively avoiding welding defects caused by pipe row offset.
During the homework process, the chain hoist needs to stably bear the weight of the pipe row, prevent the pipe row from shaking or falling, and provide a safe and stable operating environment for maintenance personnel. At the same time, the suspension points of the chain hoist can be flexibly adjusted for different positions of the tube bank in the furnace, adapting to narrow working spaces and making up for the shortcomings that large lifting equipment cannot enter.
When using, it is necessary to strictly control the selection and stress situation of the chain hoist, check the integrity of components such as chains and hooks, and avoid overloading. The reasonable application of chain hoists not only improves the accuracy and efficiency of pipe alignment welding, but also reduces the safety risks of furnace operations, providing reliable guarantees for the maintenance quality of furnace equipment in thermal power plants and assisting in the safe and stable operation of the unit.
