The following measures can be taken to prevent, detect, and respond to fatigue losses in the operation of chain hoists:

1、 Preventive measures

Select high-quality materials:

Select high-quality chain materials that have undergone quality inspection to ensure the strength and durability of the chain.

Select high-quality steel that meets the standards to reduce internal defects and impurities in the material.

Optimize design and manufacturing:

In the design phase, consider the stress and fatigue situations that the crane may encounter during use, and optimize the structural design.

Ensure quality control during the manufacturing process, reduce manufacturing defects and stress concentration points.

Reasonable use and maintenance:

Follow the operating procedures and safety precautions of the crane to avoid overloading and improper operation.

Regularly maintain the crane, check the wear of key components such as chains and bearings, and replace severely worn components in a timely manner.

2、 Testing method

Magnetic particle inspection:

The magnetic particle inspection method is very effective for detecting fatigue cracks near or on the surface of materials.

Before the inspection, it is necessary to remove debris on the surface of the crane, such as sand particles, oil stains, etc., to improve the detection sensitivity.

Magnetic particle inspection can accurately display the size, orientation, severity, and shape of fatigue defects.

Acoustic emission method:

The acoustic emission method is commonly used to detect structural fatigue using intermittent and continuous methods.

The intermittent method is suitable for long-term testing and fatigue testing with high noise components.

The continuous rule uses continuously emitted sound waves to detect the fatigue condition of the crane structure throughout the entire fatigue test.

3、 Response measures

Timely repair and replacement:

Once fatigue cracks or damage are found, the crane should be immediately stopped and repaired or damaged parts replaced.

The repair work should be carried out by professionals to ensure the quality and safety of the repair.

Strengthen monitoring and evaluation:

Regularly conduct fatigue assessments on cranes to understand their fatigue status and development trends.

Based on the evaluation results, develop corresponding maintenance plans and replacement strategies.

Training and Awareness Enhancement:

Train operators to enhance their safety awareness and operational skills.

Enable operators to understand the fatigue loss risks and preventive measures of cranes, in order to promptly identify and report potential issues.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment