The equipment requirements for explosion-proof chain hoists are as follows:

Explosion proof materials and structural design

Explosion proof treatment of key components: Components such as hooks, rollers, and chains that are prone to friction or impact should be made of copper alloy, bronze, or engineering plastics with surface resistance that meets regulations to prevent sparks from being generated. For example, the hook of a Class IIC explosion-proof crane needs to be additionally wrapped in copper alloy, and the wheel tread and rim need to use non sparking materials.

Sealing performance: The shell and connecting parts need to have good sealing to prevent flammable gases or dust from entering the interior and reduce the risk of explosion.

Static elimination: Eliminate static electricity accumulation through grounding devices, conductive shielding, and other measures to prevent explosions caused by static sparks.

Explosion proof requirements for electrical systems

Explosion proof motor and brake: An internal brake explosion-proof motor is used, and the brake wheels and brake shoes are usually designed in an open manner to reduce the risk of friction and collision.

Power supply system: The feeding device should adopt TN-S or TN-C system, equipped with cable conductive devices and traction ropes to ensure the safe isolation of the electrical system.

Explosion proof switches and control boxes: The operation control system must comply with explosion-proof standards, such as using explosion-proof switches, control boxes, etc., to prevent the generation of arcs or sparks during operation.

Mechanical Structure and Safety Devices

Metal component materials: Important welded structures such as main beams, end beams, and small frames require the use of killed steel to ensure structural strength and durability.

Anti collision and buffering device: When multiple explosion-proof cranes are running on the same span, non-metallic material buffers (with surface resistance in accordance with specifications) need to be installed to prevent static sparks from collision.

Wire rope anti groove device: made of copper alloy or other non sparking materials to prevent danger caused by wire rope groove detachment.

Operational safety and flexibility

Diversified operating methods: Supports manual control, remote control, or automated control to adapt to different hazardous environmental requirements. For example, in complex leakage scenarios, manual control or remote control can be used to improve flexibility.

Corrosion resistance: Components and casings should be made of corrosion-resistant materials to ensure long-term stable operation in hazardous material leakage environments.

Maintenance and repair requirements

Regular inspection: It is necessary to regularly maintain and repair explosion-proof equipment to ensure that its explosion-proof performance remains effective.

Safety operating procedures: During use, relevant safety operating procedures must be strictly followed to avoid human factors causing explosion-proof performance failure.

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