When using a lever chain hoist, it is necessary to strictly follow the four dimensions of safety core, standardized operation, environmental adaptation, and maintenance. Specific precautions are as follows:

1、 Safety core taboos

Overloading is prohibited: Strictly follow the rated lifting capacity (including safety factor ≥ 1.2), and the actual load shall not exceed 80% -90% of the rated value. For example, a 1.5-ton rated hoist is only allowed to lift a load of 1.2-1.35 tons to avoid brake failure or structural fracture.

Prohibit diagonal/side pulling: Non vertical lifting or diagonal pulling can cause chain derailment, hook misalignment, or torque imbalance. If non-linear work is required, models with 360 ° rotating hooks (such as Haklift VTS series) should be selected, and ensure that there are no obstacles within the rotation radius.

Prohibit personnel from being in hazardous areas: During operation, personnel must not be located directly below, above, or within the rotation radius of the load; When heavy objects are suspended, it is necessary to fix the hand zipper/handle to prevent self-locking failure and falling.

2、 Pre operation inspection standards

Equipment status check:

Chain: No breakage, rust, distortion, wear not exceeding 5% (tested every six months).

Brake: The dual brake claws and 4 spring device respond sensitively, and the braking effect is tested under no-load conditions.

Hook: The anti loosening device is intact, the rotating hook has no excessive wear, and the hook deformation detection point is normal.

Shell and coating: No cracks, complete anti-corrosion coating, working temperature range of -40 ℃ to 50 ℃.

Environmental confirmation:

Clear obstacles in the work area to ensure a flat ground.

Electric hoists need to check the stability of the power supply, while manual hoists need to confirm that the power source is sufficient.

Special environments (such as explosion-proof areas and high-temperature areas) require confirmation that the equipment meets ExIIBT4 or high-temperature resistance standards.

3、 Key monitoring points during operation

Uniform force application: When operating the manual hoist, avoid sudden pulling or releasing too quickly to prevent impact loads; Electric hoists should avoid pressing the lifting buttons simultaneously to prevent motor overload.

Direction control: The direction of the hand zipper should be consistent with the meshing direction of the sprocket to prevent detachment; When rotating, it is necessary to rotate slowly to avoid load shaking caused by emergency stop and start.

Real time status observation:

Observe the load status, and if any tilting, shaking, or abnormal noise is found, immediately stop the machine for inspection.

It is forbidden to adjust lifting points or chains during load movement.

Electric hoists need to monitor the effectiveness of limit switches and emergency stop buttons to prevent tipping or overtravel operations.

4、 Maintenance and upkeep after operation

Return and fixation: Cut off the power supply (electric hoist) and return the equipment to the designated safe position; Outdoor use requires a rain cover to prevent rainwater erosion.

Regular maintenance:

Lubricate transmission components (such as chains and gears) and replace lubricating oil every 2 months.

Check the wear of the chain every six months, and replace it if it exceeds 5%.

Conduct 25% rated load testing annually to verify the performance of brakes and limit switches.

Fault handling: When brake failure, chain breakage or other faults are found, immediately stop using and report for repair; It is prohibited to dismantle or modify safety devices (such as limit switches and brakes) without authorization.

5、 Environmental adaptation and special scenarios

Industrial scenario: During equipment installation and welding alignment, it is necessary to ensure that the lifting points are stable to avoid load shedding due to vibration; Special lifting equipment is required for bundling loose parts to prevent slipping.

Architectural scene: The lifting of precast concrete components requires matching the rotation radius and component size to avoid collisions; High altitude operations require wearing safety belts and setting up safety nets.

Logistics scenario: When loading, unloading, and stacking at the dock, it is necessary to plan the operation path based on the shelf layout to avoid excessive rotation; Explosion proof scenarios require the use of explosion-proof hoists that comply with ExIIBT4 standards and regular testing of their explosion-proof performance.

Special environment: High temperature environments require the use of high-temperature resistant lubricating oil; Stainless steel chains or anti-corrosion coatings are required for corrosive environments; Hand cranked hoists should be used in places without electricity, and backup power sources should be provided.

6、 Precautions for intelligent functions

RFID tracking: Regularly check the functionality of RFID chips to ensure accurate tracking of maintenance records.

Intelligent monitoring: Intelligent gourds (such as TOYO series) require regular calibration of IoT sensors to ensure accurate transmission of load and position data; When monitoring remotely, it is necessary to ensure network stability and prevent data delay or loss.

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