For the safe and efficient operation of emulsion lifting cranes (emulsion chain cranes), comprehensive considerations need to be made from four core dimensions: equipment selection, operation standards, maintenance, and safety protection. Specific recommendations are as follows:

1、 Equipment selection and adaptability

Load capacity matching

Select the machine model that is suitable for the rated load according to the actual job requirements (such as maximum lifting capacity and lifting height) to avoid overloading operation. For example, emulsion chain hoists used underground in coal mines usually need to meet explosion-proof requirements, with a rated load range of 1-10 tons.

Consider the work environment (such as space limitations, temperature range) and choose compact or high-temperature resistant models.

Compatibility of powertrain system

Confirm that the pressure of the emulsion pump station matches the requirements of the crane (usually 0.6-3MPa) to avoid power attenuation caused by insufficient pressure.

The concentration of emulsion should meet the standard (such as 3% -5% emulsified oil-water solution) to prevent corrosion or lubrication failure.

2、 Operating standards and safety guidelines

Operator Qualification

Operators need to undergo professional training and hold certification, familiarize themselves with equipment structure, signal system, and emergency response procedures.

Unauthorized personnel are prohibited from operating to avoid accidents caused by misoperation.

load management

Before lifting, confirm that the load weight does not exceed the rated value and use specialized lifting devices (such as chains and wire ropes) to secure it.

Do not pull diagonally or forcefully, keep the load lifted vertically to prevent tipping or chain derailment.

Signal and Communication

Designate a dedicated person to command and use standard gestures or walkie talkies to transmit signals, ensuring smooth communication between operators and commanders.

Stop the machine immediately when encountering a fuzzy signal, confirm its accuracy before continuing with the operation.

Control of homework area

Designate hazardous areas and prohibit personnel from standing or walking under loads.

During high-altitude operations, operators are required to wear safety belts and set up safety nets or guardrails.

3、 Maintenance and Fault Prevention

routine inspection

Pre start inspection: emulsion level, pipeline sealing, chain tension, and brake flexibility.

Observation during operation: Any abnormal phenomena such as abnormal noise, oil leakage, and load shaking should be immediately stopped for troubleshooting.

Maintenance after shutdown: clean the dirt on the chain, apply lubricating grease (such as lithium based grease), and check the electrical connections.

regular maintenance

Weekly: Check brake pad thickness, sprocket wear, and replace worn parts.

Monthly: Check the pressure of the emulsion pump station, clean the hydraulic filter element, and adjust the brake clearance to the standard value (such as 0.5-1mm).

Every year: Entrust professional institutions to conduct comprehensive testing, including structural strength testing and electrical system insulation inspection.

Emergency handling of faults

Brake failure: Immediately switch to emergency braking mode and start the backup power source (such as a manual pump) to reduce the load.

Chain breakage: Use a spare chain to secure the load and slowly release it to a safe area to avoid sudden drops.

Electrical malfunction: Cut off the power supply, use insulated tools to check the circuit, and prohibit live working.

4、 Safety protection and emergency measures

Personal Protective Equipment (PPE)

Operators are required to wear safety helmets, anti slip shoes, protective gloves, and safety belts when working at heights.

Maintenance personnel need to wear protective goggles and earplugs to prevent emulsion splashing or noise injuries.

environmental safety

In humid or corrosive environments, the equipment surface should be coated with anti rust paint (such as epoxy zinc rich primer) and regularly cleaned of dirt.

Install a cooling fan or cooling water jacket in high temperature environments to prevent the motor from overheating.

Emergency Response Plan

Develop emergency procedures for accidents such as fire, electric shock, and load falling, and regularly organize drills.

Fire extinguishers, first aid kits, and emergency stop buttons are provided at the work site.

5、 Compliance and Standard Compliance

Regulatory requirements

Compliant with OSHA 29 CFR 1910.179 (overhead cranes), 29 CFR 1926.550 (cranes and booms) and other standards.

Follow the ANSI/ASME B30 series specifications to ensure the safety of equipment design, manufacturing, and use.

Recording and Tracing

Establish maintenance records to record the time and content of each inspection, repair, and replacement of components.

Conduct root cause analysis of accidents or malfunctions, optimize operational processes or equipment design.

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