The protection and inspection methods for stainless steel lever cranes need to be comprehensively implemented from multiple dimensions such as daily maintenance, regular inspections, environmental adaptation, and operating standards to ensure safe and efficient operation of the equipment and extend its service life. The following is a systematic explanation of the specific methods:

1、 Protection methods

1. Anti corrosion measures

Rust treatment: Regularly use acid washing, manual polishing, or sandblasting processes to remove rust from metal surfaces, ensuring that the treated components meet the cleanliness standards required by the coating process.

Coating selection: Choose anti-corrosion coatings according to the working environment. For example, acid resistant phenolic resin paint is recommended for acidic environments, while epoxy resin paint is preferred for alkaline environments to form an effective protective layer.

Environmental optimization: In the manufacturing workshop, the concentration of corrosive gases is reduced by isolating the production process. When selecting the site, the direction of rainwater flow and wind direction are considered to reduce the corrosion impact of the environment on the equipment.

2. Daily maintenance

Lubrication management: Familiarize yourself with equipment lubrication charts, regularly add the same type of lubricating oil to key parts such as gears, bearings, chains, etc., keep the parts clean, ensure smooth hydraulic system oil circuit and normal oil pump pressure.

Cleaning and maintenance: Regularly remove oil and dirt from the surface of equipment, maintain the cleanliness of structural components, machine rooms, and the entire machine, and avoid the accumulation of dirt that may cause corrosion or performance degradation.

Tightening inspection: Regularly check whether the connecting parts (such as bolts and pin shafts) are loose to prevent structural deformation, abnormal wear, or system leakage caused by vibration.

3. Operating standards

Safe operation: Strictly abide by the "Ten No Lifting" principle, including not lifting under overload, not lifting under unclear command, not lifting if not securely tied, etc., to ensure that the operation process complies with safety regulations.

Equipment inspection: Before operation, conduct a comprehensive inspection of the brake, hook, wire rope, and safety device. If any abnormalities are found, handle them immediately and prohibit the equipment from running with faults.

Maintenance isolation: During maintenance, cut off the main power supply and hang warning signs or lock it to prevent safety accidents caused by misoperation.

2、 Inspection method

1. Daily inspection

Appearance inspection: visually inspect the equipment body, hook, and chain for cracks, deformations, or welding defects, and confirm that the connectors are not loose or missing.

Braking system test: Slowly release the lever in an unloaded state, observe whether the brake can immediately stop the chain movement, and check whether the clearance between the brake pad and the brake wheel meets the requirements.

Lubrication condition confirmation: Check the lubrication condition of key parts, supplement or replace lubricating oil if necessary, and ensure the effective operation of the lubrication system.

2. Regular inspections

Weekly inspection:

Check for brake shoe wear, contactor contact burnout, and transmission mechanism noise.

Detect the wear of steel wire ropes that have been used for more than six months, check the coupling key connection and double brake braking torque.

Confirm that all lubrication parts are in good condition and there is no oil leakage.

Monthly inspection:

Tighten the anchor bolts of the electric motor, reducer, etc., and check the wear of the carbon brush and the working surface of the steel wire rope.

Lubricate the limit switch shaft, check the lubrication of the reducer and the insulation layer of the wire conduit.

Half year inspection:

Replace the brake pads, check the electromagnetic pole surface and brake torque of the brake.

Check the gear engagement of the reducer, electrical components, and fastening of connecting bolts.

Evaluate the running condition of the wheels, insulation of electrical equipment, and the welding status of the main beam end beams.

3. Special environment inspection

Wet environment: A protective layer is formed on the metal surface by chrome plating. Before spraying anti-corrosion materials, the corroded parts need to be thoroughly treated to ensure a clean surface.

High speed rail and other humid scenarios: Choose anti-corrosion materials with excellent adhesion to avoid coating peeling caused by water vapor and extend the service life of equipment in extreme environments.

4. Special testing of chains

Appearance dimension inspection: Check whether the surface of the chain is smooth, without cracks, deformations, virtual welding or missing welding, and whether there is slag inclusion or burns at the welding points.

Net content testing: The allowable error for chains delivered in length units is ± 1%, while chains delivered in mass units must comply with the error range specified in Table 2.

Performance testing: The tensile strength, impact resistance, and total ultimate elongation of the chain are tested by a tensile testing machine to ensure that it meets the requirements for use.

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