Safety issues and solutions for European wire rope electric hoists

1、 Common security issues

Overload risk

The operator may make mistakes in experience judgment or neglect the rated load, resulting in overload of the crane, causing structural deformation or even collapse.

Hanging object falling

Due to loose binding, brake failure, or side pulling (wire rope deviating from the groove), the suspended object falls off, posing a threat to the safety of personnel below.

Brake system malfunction

The failure or insufficient dependence of the primary and secondary brakes may result in the loss of control of the suspended object during power outages.

Electrical safety hazards

Contact with live power lines or failure to maintain a safe distance may result in electric shock accidents.

Improper operation

The lifting/lowering speed is too fast, emergency stop and start cause the suspended object to shake, or communication is not smooth when multiple people cooperate, resulting in collision.

Equipment aging and lack of maintenance

Failure to timely inspect and repair issues such as wire rope wear, limit device malfunction, and loose bolts have created potential safety hazards.

2、 Targeted solutions

1. Operating standards and personnel management

Certified on duty: Operators must undergo professional training, familiarize themselves with equipment performance and safety regulations, and obtain operational qualification certificates.

Two person collaboration: The commander monitors the entire operation, and the operator reports the status in real time to ensure coordinated actions.

Speed control: lifting/lowering at a constant and stable speed, avoiding sudden stops and starts; Slow down when lifting precision equipment.

Load management: Overloading is strictly prohibited, and a load measurement system is used to monitor weight in real-time.

2. Equipment safety design

Multiple limit protection:

The European crane adopts four limit positions (upper three and lower one), including reverse upper limit pole, upper slow speed, upper fast speed, and lower limit position, to prevent the hook from hitting the top.

Turbine worm type limit switch, high stability and maintenance free.

Redundancy of braking system:

Equipped with primary and secondary brakes to ensure stable lifting during power outages.

Fault safe disc or drum brakes enhance reliability.

Anti pull design:

Optimize the steel wire rope guide device to avoid scratching or breaking caused by deviation from the groove.

Electrical safety:

Variable frequency drive technology reduces motor start-up shock and ensures smooth and vibration free operation.

Set up protective plates to isolate the sliding contact wire from the steel wire rope to prevent accidental contact.

3. Daily maintenance and inspection

Regular maintenance:

Weekly inspection of wire rope breakage and wear, brake pad thickness, and limit device sensitivity.

Monthly comprehensive inspection of steel structures, lifting mechanisms, operating mechanisms, and electrical systems.

Key component reinforcement:

Tighten the bolts at each connection point to prevent loosening.

Install safety ropes for auxiliary equipment such as electric hanging baskets, and reinforce them with square timber underneath.

Trial operation verification:

Conduct 3-5 tests at a height of 3 meters each time to verify safety performance.

After joint acceptance, sign the acceptance form to ensure that the equipment meets the standards.

4. Homework environment management

Site cleaning:

Remove track debris, ensure the ground is solid and flat, and prevent derailment.

Warning signs:

Set up stops at the end of the track to prevent the bridge from derailing.

Mark the live area and maintain a safe distance from the power line.

emergency measure:

Develop emergency plans and clarify accident handling procedures.

Equip with emergency equipment and organize regular drills.

5. Multi machine collaboration standards

Unified command: When two cranes are operating simultaneously, a dedicated person coordinates the lifting speed.

Load allocation:

The weight sharing of each machine shall not exceed 80% of the rated lifting capacity.

The total weight shall not exceed 75% of the rated sum of the two machines.

Synchronous operation: Ensure consistent walking speed and lifting action to avoid imbalance.

3、 Structural and material optimization

Lightweight design: using high-strength materials to reduce weight, enhance flexibility and work efficiency.

Modular construction: easy disassembly and assembly of components, convenient maintenance, and reduced failure rate.

Pre deformation design: The main beam design considers elastic deformation to ensure lifting strength and stability.

4、 Technical upgrade direction

Intelligent monitoring system: integrating sensors to monitor load, speed, and equipment status in real time, warning potential risks.

Remote operation technology: Reduce personnel's close range operations and lower the probability of accidents through remote control or automated systems.

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