QY Insulated Overhead Crane

Structurally similar to a standard hook-type bridge crane, this crane is equipped with insulation at key points—hook assembly, trolley frame, and trolley wheels (or beneath the trolley rails)—to prevent electrical current from charged equipment or lifted loads from endangering the operator. The insulating material is typically epoxy phenolic glass cloth laminated board.

The crane consists of a box-type frame, bridge travel mechanism, trolley, and electrical systems. To ensure operator safety, multiple insulation barriers (with a resistance ≥1 MΩ at 20–25°C and ≤85% humidity) are installed at three critical junctions:

Between the hook and pulley

Between the lifting system and trolley frame

Between the trolley frame and the main crane structure

Designed for heavy-duty service (A7 work grade), the main hoist is fitted with dual brakes for enhanced safety.

Mechanical Construction

Double-welded box girder with deflection complying with DIN/FEM standards

Steel materials: Q235B / Q345B (Chinese standards)

Trolley rail made of high-strength hot-rolled flat steel (16Mn)

Epoxy zinc-rich primer and finish coat (total 120μm) for durability and appearance

Main girder and end beams connected by high-strength bolts for structural integrity

End beams equipped with flat or double-flanged wheels, anti-friction bearings, buffers, and anti-derailment plates

Maintenance walkway on one side of the girder, with checkered plate and 1050 mm handrail

Control Systems

1.Pendant Control

36V safety voltage

Easy operation; follows crane movement

Two-speed buttons with emergency stop

IP65 protection; mechanical life ≥500,000 cycles

2.Remote Control

Yuding or other reputable brands

24V safety voltage; range ≥100 meters

Enables ground operation; multiple frequency channels prevent interference

Two-speed buttons or joystick with emergency stop

IP65 protection; mechanical life ≥500,000 cycles

3.Cabin Control

Joystick operation on linkage platform

Master controller with directional buttons, bridge light, and emergency stop

Adjustable swivel chair

Wide-view curved glass windows

Cabin manufactured in-house; air conditioning optional

Safety & Protection Systems

Overload limiter (only allows lowering when activated)

Travel limit switches (long/cross) or wireless anti-collision devices

Anti-fall protection for three-in-one travel motors

Emergency stop switch on all control stations

Polyurethane buffers at trolley and bridge travel ends

Safety hook latch to secure loads

Audible/visual travel alarms

Rain covers for outdoor hoist mechanisms, electrical cabinets, and drives

Standard protective earth conductor

Undervoltage and motor overload protection

Customization
To design a crane for your needs, please provide:

1.Lifting capacity

2.Span (including cantilever length if needed)

3.Lifting height (hook center to ground)

4.Power supply voltage

5.Rail requirement and travel distance

6.Working conditions: material type and ambient temperature

7.Plant layout drawings (if available)