The following is a detailed introduction and usage guide for the explosion-proof manual hoist trolley, covering its characteristics, operating steps, and safety regulations:

1、 Equipment definition and characteristics

Explosion proof manual hoist trolley is a lifting tool designed specifically for flammable and explosive environments, usually used in conjunction with explosion-proof manual monorail trolley to achieve heavy lifting and horizontal transportation. Its core features include:

Explosion proof material: made of copper alloys such as aluminum bronze and beryllium bronze, which do not produce sparks during friction and collision.

Structural principle: The gear transmission system is driven by dragging the hand chain to lift and lower heavy objects, equipped with a ratchet friction plate brake to ensure safe braking.

Application scenarios: Hazardous areas such as petroleum, chemical, and mining, in compliance with explosion-proof certification standards such as ATEX and IECEx.

2、 Pre use inspection

VISUAL INSPECTION

Check whether the gourd body, chain, and hook are deformed or cracked, and whether the bolt connections are loose.

functional testing

Pull the chain without load, confirm that the brake is sensitive, the gear mesh is smooth, and there is no jamming phenomenon.

Environmental confirmation

Ensure good ventilation in the work area and that the concentration of combustible gases is below 10% of the lower explosive limit (LEL).

3、 Standard Operating Procedures

1. Preparation for lifting

Load confirmation: Overloading is strictly prohibited, and the weight of the heavy object must be checked against the rated load of the hoist (such as lifting objects weighing more than 5 tons with a 5-ton hoist is prohibited).

Hanging point selection: Ensure that the hook is suspended vertically, the chain is not twisted, and the hook frame under the double row chain cannot be flipped.

2. Lifting execution

Positioning requirement: The operator should be located on the flat side of the hand chain wheel, avoiding standing under heavy objects or in the direction of chain force.

Tension control: evenly pull the hand chain, stop immediately when the tension increases abnormally, and check for overloading or chain jamming.

Brake test: After lifting 100mm off the ground and resting for 1 minute, confirm that the brake does not slip.

3. Lowering operation

Reverse pull: Slowly reverse pull the hand chain, and the heavy object descends steadily by its own weight.

Emergency braking: The brake should automatically take effect when the chain is released, and sudden release causing heavy objects to fall is prohibited.

4、 Safety precautions

Prohibited behavior

Overloaded use or inclined pulling of heavy objects

Strike the gourd with non explosion proof tools

Personnel standing under heavy objects or walking through the work area

Emergency Management

Chain jamming: Stop operation immediately and check for foreign objects or deformed chain links

Brake failure: Slowly release the chain, use auxiliary support to bear heavy objects, and prohibit forced pulling

Environmental limitations

Outdoor work is prohibited in rainy and snowy weather

When the ambient temperature exceeds -20 ℃ or+60 ℃, the material performance needs to be evaluated

5、 Maintenance and upkeep

Daily cleaning

After use, remove surface oil stains and apply rust proof oil (such as T921 rust inhibitor) to the chain

Stored in an explosion-proof cabinet with humidity controlled below 60%

Regular maintenance

Conduct no-load tests every quarter to check the wear of brake friction plates (if it exceeds 50%, it needs to be replaced)

Disassemble and inspect the gear meshing surface annually, and replace the aging lubricating grease (recommended Krupp LDS 18 Special A)

Chain management

When the elongation of the chain link exceeds 3% or the diameter wear exceeds 10%, it shall be scrapped

Do not weld repair chains or hooks

6、 Compliance management

Personnel qualifications

The operator must hold a Special Operation Certificate and receive specialized training on explosion-proof equipment.

Record retention

Establish equipment usage logs to record the load, environmental parameters, and maintenance status of each operation.

Spare parts Management

Reserve key components such as original explosion-proof certified chains and hooks to avoid the use of substitutes in emergency situations.

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