Explosion-Proof Overhead Crane

Explosion-proof cranes are specialized lifting solutions designed to operate safely in hazardous environments where flammable gases, vapors, liquids, or dust may be present. These cranes are commonly used in industries such as oil and gas, chemical manufacturing, and mining—where fire or explosion risks are high.

To minimize the risk of ignition, explosion-proof cranes are built with a variety of safety features, including spark-resistant materials, sealed electrical components and wiring, and flameproof enclosures around motors and key equipment. In addition, they are often equipped with sensors and safety systems that monitor environmental conditions and automatically shut down the crane in case of danger.

One of the key components is the explosion-proof motor. These motors are specially designed using non-sparking parts such as copper-alloy brushes and slip rings to prevent ignition. Available in both AC and DC versions, AC motors are generally used in medium-to-large cranes, while DC motors are suitable for smaller cranes or applications requiring variable speed control.

特性条件：

Key Features:

1. Explosion-Proof Performance

   • Explosion Protection Grade:

     Compliant with ExdbIICT4 Gb (or higher) standards. Critical components such as motors, electrical control boxes, and operating buttons are all designed with explosion-proof protection to prevent ignition from electric sparks or heat.

   • Applicable Environments:

     Suitable for Zone 1 and Zone 2 explosive gas atmospheres (e.g., methane, hydrogen, ethylene), and Zone 21 and Zone 22 combustible dust environments (e.g., coal dust, aluminum powder, flour).

2. Structure & Materials

   • Explosion-Proof Design:

     • Motor: Fully enclosed flameproof design to prevent internal sparks from leaking.

     • Electrical System: Explosion-proof control boxes, limit switches, and cables—all certified by national explosion-proof standards.

     • Mechanical Components: Gearboxes, brakes, and other key parts are made with non-sparking materials or sealed designs.

   • Metal Structure:

     Main girders and end beams are made from high-quality steel with anti-corrosion surface treatments (e.g., sandblasting, galvanizing, or corrosion-resistant coatings), suitable for humid or corrosive environments.

3. Safety Features

   • Multiple Protection Systems:

     • Overload Protection: Real-time monitoring with automatic shutdown when load exceeds safe limits.

     • Limit Protection: Dual lifting limit switches.

     • Emergency Stop Button: Explosion-proof emergency stop system for urgent situations.

     • Phase Failure Protection: Automatically cuts power if phase loss or imbalance is detected.

4. Hoisting Mechanism

   • Uses explosion-proof wire rope electric hoist as the hoisting mechanism, ensuring reliable performance and high cost-effectiveness.