When using an electric winch, it is necessary to strictly control it from five dimensions: operation specifications, safety protection, equipment maintenance, environmental adaptation, and personnel training, to ensure stable operation of the equipment and avoid accidents. The following are specific precautions:

1、 Operation standard: Strictly follow the process to avoid misoperation

Pre startup inspection

Power supply and circuit: Confirm voltage matching (such as 380V three-phase electricity), check that the insulation layer of the cable is not damaged, and avoid short circuits or leakage.

Mechanical components: Check whether the drum, wire rope, brake, gearbox, etc. are intact, without looseness or cracks. For example, if the number of broken wires in a steel wire rope exceeds 10%, it needs to be replaced immediately.

Lubrication system: Ensure that the gearbox, bearings, and other parts have sufficient lubricating oil (such as using 55-7 lubricating oil) to reduce wear.

Load management

Overloading is strictly prohibited: the lifting capacity shall not exceed 90% of the rated value, and the dynamic load test shall exceed 10% of the rated load to verify stability. For example, the rated traction force of JD25 dispatching winch is 18kN, and the maximum static tension force during actual lifting should be controlled within 16.2kN.

Load balancing: The double lifting point electric winch needs to adjust the spacing between the hooks to ensure even load distribution and avoid tilting or shaking.

operation control

Uniform lifting: Avoid sudden acceleration or deceleration, prevent wire rope breakage or load shedding.

Prohibition of diagonal pulling: The steel wire rope must be lifted vertically, and a diagonal pulling angle exceeding 5 ° will cause the steel wire rope to wear more severely and even slip out of the groove.

Emergency braking: In case of any abnormality (such as abnormal noise or smoke) during operation, immediately press the emergency stop button, cut off the power, and check the cause.

2、 Security protection: Building multiple safeguards to reduce risks

personal protection

Operators need to wear protective equipment such as safety helmets, anti slip shoes, insulated gloves, etc. to avoid falling objects from high altitude or electric shock.

Do not stand or walk within the operating range of the winch, maintain a safe distance (at least 3 meters).

Equipment protection

Anti slip rope device: Ensure that the steel wire rope is arranged neatly on the drum to prevent accidents caused by slipping out of the groove.

Overload limiter: Install electronic or mechanical overload protection devices that automatically stop running when the load exceeds the rated value.

Limit switch: Set travel limits at both ends of the drum to prevent the wire rope from over winding or loosening.

Environmental protection

Rainproof and moisture-proof: When used outdoors or in humid environments, a rainproof cover should be installed to prevent electrical components from short circuiting.

Corrosion prevention: In corrosive environments such as chemical and marine environments, winches made of stainless steel or coated with anti-corrosion coatings are selected.

3、 Equipment maintenance: Regular maintenance to extend lifespan

routine inspection

Wire rope: Check for broken wires and wear daily, apply anti rust oil to maintain lubrication.

Brake: Test the brake shoe clearance (≤ 1.5mm) to ensure sensitive and reliable braking.

Electrical system: Check if the wiring terminals are loose and if the insulation resistance meets the standard (≥ 1M Ω).

regular maintenance

Monthly maintenance: Clean the gearbox and replace the lubricating oil; Check the temperature of the motor bearings (≤ 70 ℃).

Annual overhaul: Disassemble and inspect core components such as drums and gears, replace worn parts, and conduct load testing.

Spare Parts Management

Reserve commonly used spare parts (such as wire ropes, brake pads, contactors) to ensure quick replacement in case of malfunction.

4、 Environmental adaptation: Match working conditions to ensure stability

temperature control

When used in high temperature environments (>40 ℃), it is necessary to strengthen heat dissipation (such as adding fans or water cooling systems).

When used in low-temperature environments (<-10 ℃), low-temperature lubricating oil should be selected to avoid component jamming.

space constraints

In low rise factories (such as those with a height of less than 5 meters), use electric winches with low clearance design to avoid collisions.

In narrow spaces such as underground, choose explosion-proof winches to prevent gas explosions.

Special working conditions

Underwater operation: Use a winch with a waterproof rating of IP68, seal the motor and electrical box.

Explosion proof scenario: In places such as coal mines and oil depots, explosion-proof motors and explosion-proof control boxes are used.

5、 Personnel training: Enhance skills and standardize operations

Theoretical training

Learn the structural principles, safety regulations, and emergency response methods of electric winches.

Understand load calculation methods (such as static tension formula)F max=W⋅g⋅(sinα+f onecosα)）.

Practical training

Under the guidance of professional personnel, simulate operations and master the processes of starting, running, braking, etc.

Practice emergency situations such as wire rope breakage, motor overheating, etc.

Assessment and Certification

Operators must pass theoretical exams and practical assessments, and obtain operational qualification certificates before they can take up their posts.

6、 Emergency response: rapid response, reducing losses

Wire rope breakage

Immediately press the emergency stop button to cut off the power.

Use spare steel wire ropes to re secure the load and prevent it from falling.

Motor overheating

Stop running and check if the cooling system is blocked or if the load is too high.

After the motor cools down to room temperature, restart and reduce the load.

brake failure

Activate mechanical braking (such as handbrake) or manual lowering device to slowly release the load.

Check for brake oil or circuit faults, repair and perform load testing.

7、 Regulations and standards: compliant use, avoiding penalties

Comply with national standards

Electric winches must comply with mandatory standards such as GB/T 3811-2008 "Code for Design of Cranes".

Explosion proof winches must be certified by ATEX or IECEx to meet the requirements for use in explosive environments.

periodic inspection

Every year, a special equipment inspection agency conducts safety assessments and issues inspection reports.

Immediately stop using equipment that fails the inspection, and re inspect it after rectification.

Records Management

Establish equipment operation logs to record maintenance, repair, and troubleshooting information.

Save the inspection report and operator qualification certificate for inspection by regulatory authorities.

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