Manual winches (chain hoists) in operation may cause a series of problems due to mechanical failures, improper operation, environmental factors, or lack of maintenance. The following is a detailed explanation from four aspects:

1、 Mechanical malfunction related issues

Brake system failure

Reason: Brake friction plate wear, hydraulic brake oil leakage, spring fatigue, brake band bending and deformation, or electromagnetic coil burnout.

Consequence: Failure of the brake system can lead to accidents such as falling objects during lifting, and in severe cases, equipment overturning or personal injury.

Solution: Regularly check the brake and replace worn parts in a timely manner; Clean the oil stains and adjust the spring pressure; Ensure stable voltage and avoid burning out the electromagnetic coil.

Wire rope breakage

Reason: Overloading operation, wear and aging of steel wire rope, incorrect installation or loose fixation of rope clamp.

Consequence: A broken steel wire rope can cause heavy objects to fall, resulting in equipment damage or personal injury.

Solution: Strictly control the load to avoid overloading; Regularly inspect steel wire ropes and replace worn or aged ones in a timely manner; Ensure that the rope clamp is installed correctly and securely fixed.

Damaged drum or pulley

Reason: Chaotic rope arrangement leads to rope disorder, and excessive wear of the wheel groove causes rope detachment.

Consequence: Damage to the drum or pulley can affect the normal operation of the steel wire rope and increase the risk of accidents.

Solution: Keep the steel wire ropes arranged neatly to avoid disorderly ropes; Regularly check the wear of the wheel groove and replace severely worn pulleys in a timely manner.

2、 Improper operation related issues

Overloading operation

Reason: The operator exceeded the rated load capacity of the winch in pursuit of efficiency or ignored warnings.

Consequences: Overloading can cause equipment damage, wire rope breakage, or brake failure, leading to serious accidents.

Solution: Strictly adhere to the rated bearing capacity of the winch and prohibit overloading operations; Set up overload protection devices to ensure that the equipment automatically stops running when overloaded.

misoperation

Reason: The operator is not familiar with the equipment performance or operating procedures, resulting in misoperation.

Consequences: Improper operation may cause equipment failure, heavy object falling, or personal injury.

Solution: Strengthen operator training to ensure they are familiar with equipment performance and operating procedures; Develop detailed operating procedures and strictly implement them.

Signal command error

Reason: Poor communication between signal workers and operators or incorrect signal command.

Consequence: Signal command errors may lead to operator misoperation and cause accidents.

Solution: Strengthen communication and training between signal workers and operators to ensure accurate signal command; Set up a two-way communication system and signal indication system to improve communication efficiency.

3、 Environmental factors related issues

Unstable or overturned foundation

Reason: Improper anchor setting, failure to clamp the track of the track type winch, or incorrect design of the fixing point.

Consequences: Unstable or overturned foundations can cause equipment to shift, heavy objects to fall, or personnel to be injured or killed.

Solution: Ensure that the anchor is firmly and reliably set up; Rail mounted winches should be equipped with rail clamping devices; The design of fixed points should be scientifically reasonable and in line with the force characteristics of the equipment.

Adverse weather conditions

Reason: Adverse weather conditions such as thunderstorms, dense fog, or strong winds.

Consequences: Adverse weather conditions may affect the visibility and judgment of operators, increasing the risk of accidents.

Solution: Stop working under adverse weather conditions; Set up a sunshade and rain proof work shed to ensure good visibility for operators; Strengthen equipment protection measures to prevent equipment damage.

4、 Maintain missing related issues

Lack of regular inspections

Reason: Failure to regularly inspect various components of the winch, such as the motor, hydraulic system, wire rope, etc.

Consequence: Lack of regular inspections may result in equipment failure hazards not being detected and addressed in a timely manner, leading to accidents.

Solution: Develop a detailed regular inspection plan to ensure that all components of the equipment are inspected and maintained in a timely manner; Establish equipment maintenance records and document the maintenance status of the equipment.

Insufficient cleaning and lubrication

Reason: Failure to regularly clean the winch or provide appropriate lubrication.

Consequence: Insufficient cleaning and lubrication will increase the risk of equipment wear and failure, and shorten the service life of the equipment.

Solution: Regularly clean the winch to remove dust and dirt; Provide appropriate lubrication according to equipment requirements to reduce friction and wear.

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