The use of explosion-proof manual hoist trolley to assist lifting operations must follow standardized operating procedures to ensure safety, compliance, and efficiency. Here is a specific step-by-step guide:

1、 Preparation before homework

Environmental Assessment

Detect the concentration of combustible gases (less than LEL 10%) using a four in one gas detector.

Confirm that there are no open flames or high-temperature surfaces (such as welding sparks) in the work area.

Equipment inspection

Visual inspection: Chain cracks, brake pad thickness (>3mm), wheel axle lubrication.

Functional test: Run 3 times without load to confirm the smoothness of braking and lifting.

Grounding verification: The measured value of the grounding resistance tester is ≤ 1 Ω.

Tool preparation

Explosion proof intercom and explosion-proof lighting (Ex d IIB T3 level).

Emergency equipment: fire blanket, static eliminator, first aid kit.

2、 Load mounting

Center of gravity calculation

Using formula L=

H

W×D

Calculate the load torque (W=weight, D=center of gravity offset distance, H=lifting height).

Ensure that the torque is less than the rated value of the equipment (e.g. a 1-ton hoist requires a torque of less than 1000N · m).

Fixed method

Use explosion-proof steel wire rope clamps (4 per end) or chain hoists.

Avoid sharp angle contact, and anti slip rubber pads should be placed on the contact surface of the load.

3、 Enhance operations

Station specifications

The operator stands on the side of the equipment and maintains a safe distance of>0.5m from the load.

The guardian is located at the emergency stop button position (distance<3m).

Action standards

Pull the handle: Pull at a constant speed (speed ≤ 0.3m/s), and sudden force is prohibited.

Brake application: Pause once every 1m to check the brake lock status.

Prohibited behaviors: Overloading, diagonal pulling (angle>3 °), and standing below.

4、 Exception handling

Dealing with lag

Immediately stop the operation and check for overloading or chain knots.

Forcefully pulling is strictly prohibited. It is necessary to slowly retract and readjust the load position.

Spark generation

Immediately stop the operation and use a static eliminator to spray the surface of the load.

Report to the security department to detect the concentration of environmental gases.

Equipment failure

Activate emergency plan: Cut off the power supply in the work area and evacuate personnel to a safe zone.

Use a spare explosion-proof hoist (certified to the same level) to complete the upgrade.

5、 Post homework maintenance

Clean and lubricate

Clean the chain groove with an explosion-proof vacuum cleaner and apply Kl ü ber Lubrication grease.

Check the corrosion of the explosion-proof surface (using a 30x magnifying glass).

Record archiving

Fill out the "Explosion proof Equipment Usage Record Card": including the operator, load weight, and environmental parameters.

Upload to the blockchain based device archive.

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