Safety Precautions for Frequent Use of Group Hoist Electric Hoists Tow Crane

Group hoist electric hoists are widely used in construction, manufacturing, and maintenance for lifting and transporting heavy loads. While these tools greatly enhance efficiency, improper use can lead to equipment damage, accidents, or injuries. This guide outlines the critical safety measures and maintenance practices required for the frequent use of group hoist electric hoists.

1. Regular Inspection of Wire Ropes

လည်ပတ်နေစဉ်, operators must frequently check the wire ropes for issues such as:

Twisting or knotting: These can reduce the strength of the wire rope and lead to snapping.
Dislodgment or slipping: Ensure the rope remains properly aligned with the grooves of the drum.
Wear and tear: Inspect for fraying or corrosion and replace the rope immediately if any damage is detected.

ထို့ အပြင်, guide rope devices နှင့် limit switches should be checked regularly to ensure they are functioning reliably. Faulty components must be replaced promptly.

2. Avoid Side Lifting and Overloading

Group hoist electric hoists should never be used for side lifting or pulling loads at an angle. Always lift loads vertically to avoid excessive strain on the equipment. Overloading the hoist beyond its rated capacity is strictly prohibited, as it can lead to structural damage, wire rope failure, or motor burnout.

3. Pre-Operation Checklist

Before using the hoist, conduct a thorough inspection of the equipment and surrounding environment:

Clear Pathways: Ensure there are no obstacles in the operator’s walking area or the route the load will take.
Responsive Controls: Test the hand-held control buttons for accurate and sensitive responses.
Motor and Reducer Noise: Listen for unusual sounds in the motor or reducer, as these may indicate mechanical problems.
ဘရိတ်စနစ်: Verify that the brake system is responsive and reliable.
Rail Tracks: Ensure the tracks are free from foreign objects that could obstruct the hoist’s movement.
Limit Switches: Check that upper and lower limit switches operate accurately.
Hook Safety: Inspect that the hook’s stopper nut is securely tightened and that the hook can rotate freely both horizontally and vertically.
Pulley Operation: Confirm that pulleys move smoothly and are free from obstructions.

4. Proper Use of Limit Switches

Limit switches should not be used as a routine method for stopping load lifting or equipment operation. They are safety devices intended for emergency purposes only. Over-relying on them can result in mechanical wear and malfunctions.

5. Shutdown Procedures

After completing operations:

Turn off the main power switch to ensure the hoist is completely powered down.
Secure the hoist in a safe location, and if operating outdoors, cover the equipment with a protective rain shield.

6. Routine Maintenance and Weekly Inspections

Designate trained personnel to perform regular maintenance and safety checks:

Inspect critical components, including motors, brakes, and limit switches, at least once a week.
Address any identified issues immediately to prevent potential hazards.

7. Brake and Motor Maintenance

The brake ring on the motor fan or brake wheel must remain free from grease or debris to ensure reliable braking. The adjustment nuts on the brake should be securely tightened to prevent brake failure, which could result in accidents.

8. သင့်လျော်သောချောဆီ

Regular lubrication is essential to maintain the hoist’s performance:

Apply clean, impurity-free lubrication oil to all moving parts, including gears and bearings, approximately every two months.
Ensure the lifting reducer and traveling reducer are filled with sufficient lubricant before use.

9. Emergency Protocol for Faults

If a fault occurs during operation, immediately stop the hoist and cut off the main power supply. This minimizes further damage to the equipment and ensures the safety of nearby personnel.

10. Avoid Leaving Suspended Loads

When the hoist is not in use, never leave loads suspended in mid-air. This prevents permanent deformation of components and reduces risks associated with accidental load drops.

11. Storage and Environmental Protection

When the hoist is not in use:

Store it in a designated safe area.
Outdoor hoists should be equipped with rain covers to prevent exposure to harsh weather conditions.

12. Avoid Corrosive or Explosive Environments

Group hoist electric hoists are unsuitable for use in:

Environments with corrosive gases.
Areas with a relative humidity exceeding 85%.
Situations requiring explosion-proof capabilities.
Transporting hazardous materials, such as molten metals, toxic substances, or flammable materials.

13. Safe Disassembly During Repairs

When disassembling the lifting reducer, avoid using screwdrivers or chisels on joint surfaces. Use a wooden mallet to gently tap protruding parts of the casing to prevent damage to the sealing surfaces.

14. Operating Temperature Range

The recommended working temperature range for electric hoists is -25°C to +40°C. Operating outside this range may result in reduced performance or damage to the equipment.

15. Proper Use of Control Buttons

Never press two opposing direction buttons (ဥပမာ, up and down) simultaneously, as this could damage the control system. သို့သော်, simultaneous operation of compatible buttons is permitted.