Why should a single beam bridge crane be installed with a height limiter?

Why should a single beam bridge crane be installed with a height limiter?

The height limiter is a safety device necessary for single-girder bridge cranes to limit the rise height of the pick-up device. When the spreader of the single-girder bridge crane rises to the upper limit position, the limiter will automatically cut off the power supply to prevent the lifting device such as the hook from continuing to rise, causing the crane to rush to the top, and after the wire rope is fully contracted, the electric hoist or the hoisting machine continues to work. Broken wire rope, causing a heavy object drop accident.

The height limiter device combines the stroke switch with the convex-concave brace structure, has a simple structure and is sensitive to action, and effectively suppresses the occurrence of a heavy object drop accident, thereby ensuring the safe production of the single beam crane work site. After several years of use, the effect is remarkable. Structure and installation: The travel switch is bolted to a semi-closed protective box made of sheet steel. The bottom of the protective box is welded with two slide seats, and the convex and concave pull strips can move left and right along the slide rails in the slide seat. A small hole is drilled at one end of the convex-concave brace to fix a thin wire rope or a nylon rope. Thin steel wire rope nylon rope is used to set the limit height.

The height limiter effectively protects the hoisting mechanism from excessive pulling. Therefore, single-girder bridge cranes must be equipped with height limiters.