For the operation protection and inspection methods of pneumatic hoist, it is necessary to comprehensively implement them from four dimensions: daily inspection, regular maintenance, safety operation norms, and professional testing, in order to ensure the safe operation of the equipment and extend its service life. Here are the specific methods:

1、 Daily inspection: the first line of defense against malfunctions

Appearance and structural inspection

Hulu body: Check the shell for cracks, deformation, or corrosion to ensure that no foreign objects are stuck in the moving parts.

Hook and chain: Confirm that the hook has no cracks or deformations, and the anti detachment device is intact; The chain is free from breakage, distortion, or excessive wear (such as chain ring deformation or surface corrosion).

Connectors: Check whether the fasteners such as wire rope clamps, bolts, and pin shafts are loose or missing to ensure reliable connections.

Pneumatic system inspection

Tracheal and connector: Check if the trachea is aging or cracked, if the connector is well sealed, and if there is no air leakage.

Pressure regulation: Confirm that the gas supply pressure meets the equipment requirements (usually 6kgf/cm ²) to avoid performance abnormalities caused by excessive or insufficient pressure.

Lubrication system: Check whether the lubricating oil (grease) is sufficient, whether the oil circuit is unobstructed, and ensure that the moving parts are fully lubricated.

Safety device testing

Limit switch: Test whether the upper and lower limit devices are sensitive to avoid overtravel operation.

Braking system: Check whether the brake is reliable and ensure that it can immediately stop running in case of power failure or air supply interruption.

Emergency stop button: Verify if the emergency stop function is functioning properly and ensure that the power or gas source can be quickly cut off in emergency situations.

2、 Regular maintenance: key to extending equipment lifespan

Cleaning and anti-corrosion

Regularly clean the surface and internal dust and oil stains of the gourd to prevent corrosive substances from corroding it.

Apply rust proof oil to metal parts and lubricate and maintain moving parts such as chains and gears.

Component replacement

Chain: Replace regularly according to the degree of wear to avoid the risk of breakage.

Hook: If cracks or deformations occur, replace immediately and repair welding is prohibited.

Seals: Regularly replace vulnerable seals such as air pipes and oil seals to prevent air or oil leakage.

System Calibration

Adjust the pressure control components to ensure sensitive and effective operation, and ensure that there is no air leakage in the pipelines and valves.

Calibrate the load sensor (if any) to ensure accurate weight display and avoid overloading.

3、 Safety Operation Standards: Prevention and Control of Human Factors

Pre-operation preparation

Confirm that the work environment is safe, the ground is flat and solid, and there are no obstacles or hazardous areas.

Check if the lifting equipment (such as hooks and slings) is intact and avoid using damaged or expired lifting equipment.

Ensure that operators are certified and familiar with equipment performance and operating procedures.

Precautions during operation

Overloading is prohibited: strictly use according to the rated load to avoid chain breakage or hoist overturning.

Avoid lateral loading: When lifting, maintain vertical lifting and prohibit diagonal or lateral traction.

Prevent impact: Avoid sudden starting or stopping to reduce the impact load on the equipment.

Personnel safety: Keep hands and clothing away from rotating parts during operation, and do not stay under suspended objects.

Post operation processing

Turn off the gas source, release residual pressure, and prevent the equipment from accidentally starting.

Park the gourd in the designated location to avoid prolonged hovering or exposure to harsh environments.

4、 Professional testing: in-depth investigation of hidden dangers

annual inspection

Entrust a professional organization to conduct a comprehensive inspection of the gourd, including structural strength, safety devices, pneumatic systems, etc.

The testing items can refer to the "Rules for Periodic Inspection of Lifting Machinery" to ensure compliance with national standards.

troubleshooting

If there is abnormal noise, vibration, or performance degradation, immediately stop the machine for inspection and troubleshoot before continuing to use.

Focus on monitoring frequently malfunctioning components and replace or upgrade them as necessary.

5、 Seasonal maintenance: responding to environmental changes

Winter maintenance

Replace the low-temperature lubricating oil to prevent the oil from solidifying and affecting performance.

Check if the trachea is frozen and cracked to ensure that the pneumatic system is working properly.

Summer maintenance

Clean the cooling system to prevent equipment from overheating.

Check whether the electrical components are damp to avoid the risk of short circuit.

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