Explosion-proof steel wire rope electric hoists are designed for use in hazardous environments (e.g., Zone 1/2 or Division 1/2 areas with flammable gases, vapors, or dust). Their construction prioritizes non-sparking materials and robust design to prevent ignition sources. Below are the main materials and components:

1. Structural Components

Frame/Housing:

Cast Iron or Nodular Cast Iron: Durable, corrosion-resistant, and non-sparking.

Stainless Steel: For corrosive environments (e.g., offshore or chemical plants).

Aluminum Alloys: Lightweight and non-ferrous, often used in enclosures.

Hooks/Load-Bearing Parts:

Forged Alloy Steel: High strength and impact resistance.

Stainless Steel: For hygiene or marine applications.

2. Motor & Gearbox

Motor Housing:

Cast Iron or Aluminum: With flameproof joints (e.g., Ex d enclosures) to contain sparks.

Bearings:

Bronze or Phenolic Resin: Non-sparking and self-lubricating.

Gears:

Case-Hardened Steel: For durability, with spark-resistant coatings.

3. Brake System

Brake Discs/Pads:

Ceramic or Asbestos-Free Composites: High-temperature resistance and non-sparking.

Actuators:

Stainless Steel or Aluminum: Corrosion-resistant and lightweight.

4. Wire Rope

Galvanized or Stainless Steel Wire Rope:

Resists corrosion and minimizes static buildup (coated options available for extra protection).

5. Electrical Components

Contacts/Switches:

Silver-Tungsten or Copper Alloys: Low electrical resistance and non-sparking.

Cable Glands:

Nickel-Plated Brass or Stainless Steel: For secure, spark-free connections.

6. Seals & Gaskets

Elastomers (e.g., Nitrile, Viton):

Resistant to oils, fuels, and extreme temperatures.

Metal-to-Metal Seals:

For high-pressure applications, ensuring no sparks escape.

7. Explosion-Proof Design Features

Flameproof Enclosures (Ex d):

Gaps between joints are designed to cool/quench sparks before they exit.

Increased Safety (Ex e):

Reduced spark energy via circuit design and component selection.

Pressurized Enclosures (Ex p):

Maintained overpressure to prevent hazardous gas entry.

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