The normal operation of the belt conveyor must make the conveyor belt have a certain tension. The equipment that provides the tension is the ratchet strap manufacturer. The so-called "tightening" has the meaning of absorbing the elongation of the conveyor belt and providing tension to the conveyor belt.

Make the conveyor with sufficient tension to ensure that sufficient driving force can be generated between the conveyor belt and the drive roller to prevent slippage; ensure that the tension at each point of the conveyor belt is not lower than a given value to prevent the conveyor belt from being between the rollers. Excessive slack in the space causes material spreading and increased running resistance; compensates for the elastic and plastic deformation of the conveyor belt; provides the necessary stroke for the conveyor belt to reconnect.

For long-distance, high-tension conveyors, it is necessary to consider providing different tensioning forces in different working conditions to improve the service life of the conveyor belt. When the conveyor starts and brakes, the tension required to ensure the transmission of the starting and braking force is different, and the tension distribution of the conveyor belt is also different. It is necessary to consider meeting the sag condition of the conveyor belt under these two working conditions. The required tension is also correspondingly increased, so it is required to have a greater tension during starting and braking than during normal operation. This requires the tensioning device to provide corresponding tensioning force under different working conditions.

In practical applications, a water tank has appeared as a tensioning device, and the water tank is filled with water before the start of the conveyor to increase the tension. When the conveyor reaches the normal operating state, the water is released, and the tension is reduced to meet the tension of normal operation. Generally, there is also a ratchet tie-down strap for use with fixed goods.