Precautions for lifting stainless steel lever hoist

1、 Operating standards and safety requirements

Overloading is strictly prohibited

It is necessary to confirm that the lifting weight does not exceed the rated load to avoid chain fatigue fracture (such as the 2022 Wuhu accident where one person died due to chain fracture caused by overloading).

Lesson learned from the case: In the 2024 Rizhao accident, the chain fatigue fracture caused the elevator car to fall, resulting in 2 deaths. The direct causes included overloading and failure to detect chain fatigue in a timely manner.

Apply even force

Avoid pulling the zipper forcefully to prevent it from getting stuck or slipping out of the slot; If it cannot be pulled, the cause must be identified (such as chain twist, brake failure), and forced operation is not allowed.

Special scenario: When lifting diagonally or horizontally, adjust the zipper direction to be consistent with the sprocket to prevent it from slipping out of the slot.

Personnel location

Operators are not allowed to stand directly under the hoist or on the path of lifting objects to prevent falling and injuring people.

When multiple gourds work together, a dedicated person commands synchronous lifting to avoid uneven load distribution.

Hovering and fixing

When lifting heavy objects and temporarily hovering, fix the hoist on the lifting chain to prevent the self-locking mechanism from malfunctioning.

It is strictly prohibited to hang heavy objects in the air, and warnings should be given during operation or when lowering the suspended objects. It is strictly prohibited for the suspended objects to pass over human heads.

2、 Equipment inspection and maintenance

1. Inspection before lifting

Chain and hook:

Confirm that the chain is not twisted or deformed, the hook anti loosening device is intact, and there are no cracks or excessive opening.

The lifting chain shall not be twisted and shall not be disassembled into single strands for use.

Braking system:

Check if the brake friction surface is clean and adjust the brake clearance to the standard range (usually 1.5mm).

The no-load test confirms that the braking is reliable, and the friction plate wear exceeds the limit and needs to be replaced.

Lubrication and Cleaning:

Add lubricating grease to worn parts such as gears and bearings, and apply anti rust oil to chains.

After use in the food/chemical industry, wipe off dirt and store in a dry place.

2. Monitoring during lifting

Running status:

Observe whether the chain is suspended vertically to avoid derailment or chain jamming caused by diagonal pulling.

Listen to the sound of equipment operation, abnormal noise may indicate gear or bearing failure.

Load management:

When lifting heavy tonnage objects, lift them slightly off the ground and confirm stability before raising them.

Overloading is strictly prohibited, and the weight of the goods shall not exceed the rated lifting capacity.

3. Maintenance after lifting

Regular testing:

Replace the chain immediately if the wear exceeds 10%, and evaluate fatigue cracks using nonlinear ultrasonic testing technology.

Conduct a comprehensive inspection every year, including electrical systems, limiters, and emergency stop functions.

Recording and archiving:

Record each inspection, maintenance, and replacement of components, establish equipment files for easy traceability.

3、 Environmental adaptability

Wet/corrosive environments (such as chemical and marine terminals):

Choose 316 stainless steel material and undergo regular anti-corrosion treatment.

Wipe off dirt and grime after use to avoid salt spray or chemical residue.

Food/Pharmaceutical Industry:

Ensure that the equipment is clean and stored in a dry location to prevent contamination of the product.

In the field of architecture/engineering:

Use aluminum alloy material in conjunction with magnetic environment to avoid magnetic field interference.

When multiple gourds work together, a dedicated person commands synchronous lifting.

4、 Special scenario handling

Chain handling:

Immediately stop the machine, cushion the heavy object before conducting maintenance to avoid sudden breakage.

emergency:

When encountering chain jamming or abnormal noise, press the emergency stop button, cut off the power, and troubleshoot.

Regulatory compliance:

According to the "Operation Regulations for Electric Hoist Cranes" (2025), operators must hold a certificate and conduct regular no-load tests and depth inspections.

5、 Industry standards and case analysis

national standard:

The Regulations on Safety Supervision of Special Equipment require that equipment must be operated by professionally trained personnel, and it is prohibited to work under the influence of alcohol or fatigue.

Before operating the crane, it is necessary to check the power lines, controllers, limiters, etc. to ensure their integrity.

Industry standards:

Chemical industry: Check the brakes every shift to avoid brake failure causing heavy objects to fall.

Food industry: Emphasize cleanliness and rust prevention, store in a dry place after use.

In the field of architecture, aluminum alloy material is anti magnetic, and collaborative operations require dedicated personnel to command.

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