Before using an electric winch for lifting and lowering operations, a comprehensive inspection should be conducted from the four core dimensions of mechanical structure, electrical system, safety devices, and operational testing to ensure the safe operation of the equipment. The following are specific inspection points and analysis:

1、 Mechanical structure inspection

Stability of winch body

Check whether the anchor, bolt or foundation is firm to prevent accidents caused by equipment displacement during operation.

Basis: Loose anchor may cause the winch to overturn as a whole, which meets the requirements of the "Mine Safety Regulations" for the stability of lifting equipment.

Wire rope status

Check for wear, breakage, and corrosion to ensure that the number of broken wires does not exceed the limits specified in the Safety Regulations for Lifting Machinery.

Confirm that the steel wire ropes are arranged neatly without any twisting, knotting, or jamming.

Basis: Steel wire rope is a key load-bearing component, and damage may cause heavy objects to fall.

Lubrication of transmission components

Check the oil level or lubrication point of the oil mist device to ensure sufficient lubrication of components such as gears and bearings.

Basis: Insufficient lubrication can accelerate component wear and shorten equipment life.

Bolts and connectors

Check whether the connecting bolts and nuts of each component are tightened to prevent loosening and structural instability.

Basis: Loose bolts may cause equipment vibration or component detachment.

2、 Electrical system inspection

Power supply and wiring

Check if the power supply voltage is stable and use a Domit test to test the battery voltage (the electric winch needs to confirm that the battery is fully charged).

Check the insulation performance of electrical circuits to ensure no damage, aging, or corrosion, and prevent leakage or short circuits.

Basis: Electrical faults are a common cause of winch accidents and must comply with safety electrical regulations.

Control panel and signal device

Test whether the operation handle, switch, emergency stop button and other functions are normal.

Check the sensitivity of the sound and light warning device to ensure that personnel in the work area can receive signals in a timely manner.

Basis: Control failure may lead to misoperation, and the absence of warning devices can reduce operational safety.

3、 Safety device inspection

braking system

Check the wear of the brake strip to ensure good contact between the brake shoe and the brake wheel, and ensure that the braking force meets the requirements.

Test the braking response speed to ensure rapid shutdown in emergency situations.

Basis: Brake failure is the direct cause of winch accidents and requires regular calibration.

Limit protection device

Check if the upper and lower limit switches are sensitive to prevent the drum from over winding or the wire rope from slipping out of the groove.

Basis: The limit device can prevent equipment from overloading and protect the mechanical structure.

Safety protection device

Confirm that safety facilities such as protective covers and guardrails are in good condition to prevent personnel from coming into contact with rotating parts.

Basis: Lack of protection may lead to mechanical injury and must comply with safety protection standards.

4、 Run test

No load trial operation

Start the winch and observe if it runs smoothly and if there are any abnormal sounds or vibrations.

Check whether the arrangement of the steel wire rope on the drum is neat and there is no climbing or disorderly rope phenomenon.

Basis: No load testing can detect mechanical or electrical faults in advance and avoid working with problems.

Load testing (optional)

Conduct a small load test under safe conditions to verify whether the winch lifting capacity meets the rated value.

Basis: Load testing can confirm the actual performance of the equipment, but strict adherence to operating procedures is required.

5、 Environmental and operational inspections

Cleaning of homework area

Remove obstacles around the winch to ensure sufficient operating space and prevent collisions or jamming.

Basis: Interference from debris may cause obstruction of equipment operation or tripping of personnel.

Operator Qualification

Confirm that the operators have received professional training, are familiar with equipment performance and operating standards, and are strictly prohibited from working without certification.

Basis: Human error is an important cause of winch accidents, and training management needs to be strengthened.

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