The operation and maintenance of explosion-proof electric hoists require strict adherence to safety protocols to ensure reliable performance in hazardous environments. Below is a structured explanation of key precautions:

1. Pre-Operation Inspections

Environmental Check: Ensure the workspace is clear of obstacles and that the operating area meets explosion-proof requirements (e.g., gas/dust concentration below 25% LEL).

Equipment Inspection:

Verify the integrity of the explosion-proof enclosure, cables, and connectors.

Check for loose bolts, damaged wires, or signs of wear on critical components like hooks, chains, and limit switches.

Confirm that safety devices (e.g., overload limiters, emergency stops) are functional.

2. Safe Operation Practices

Load Handling:

Never exceed the rated load capacity. Perform load tests (10% overload dynamic test and 25% overload static test) before initial use.

Avoid side loading or using the hoist as a horizontal pulling tool.

Operator Qualifications:

Only trained personnel with knowledge of explosion-proof equipment should operate the hoist.

Operators must wear appropriate PPE (e.g., helmets, gloves, safety shoes).

Prohibited Actions:

Do not leave suspended loads unattended.

Avoid sudden starts/stops to prevent mechanical shock.

Never modify or bypass safety devices (e.g., limit switches).

3. Maintenance Requirements

Lubrication:

Regularly lubricate moving parts (e.g., chains, gears) with explosion-proof-compatible grease.

In cold environments, heat lubricants before application.

Electrical System:

Inspect cables for damage and ensure connections are tight.

Use a megohmmeter to test insulation resistance (≥5 MΩ under normal conditions).

Mechanical Components:

Check brake performance (brake slip distance S≤

100

V

, where V is the lifting speed in m/min).

Replace worn-out parts (e.g., wires, hooks, chains) immediately.

4. Post-Operation Procedures

Shutdown:

Park the hoist in a designated area with the hook raised ≥2 m above ground.

Turn off the main power supply and lock the control panel.

Cleaning:

Remove dust, debris, and corrosive substances from the hoist to prevent degradation.

Record-Keeping:

Document all inspections, maintenance, and repairs for traceability.

5. Emergency Response

Fault Handling:

Immediately stop operation if abnormal noise, vibration, or overheating is detected.

Do not restart until the issue is resolved by qualified personnel.

Accident Protocols:

Operators must be familiar with evacuation routes and emergency shutdown procedures.

Report incidents promptly and cooperate with investigations.

6. Compliance and Certification

Certification: Ensure the hoist has valid explosion-proof certificates (e.g., ATEX, IECEx, CNEX).

Regulations: Adhere to local safety standards (e.g., GB 3836 series in China) and manufacturer guidelines.

7. Environmental Restrictions

Prohibited Environments: Do not use in areas with:

Corrosive gases or high humidity (>85% RH).

Extreme temperatures (<-25°C or >+40°C).

Presence of molten metals, toxic, or highly flammable materials.

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