Detailed Introduction

The 30t 30m Electric Grab Crane is a marine crane installed on small bulk carriers and mounted on the ship's deck. It features both wire rope and hydraulic cylinder boom adjustments. This crane can rotate 360 degrees and adjust its boom length within its reach, powered entirely by hydraulic systems. Key components, including motors, hydraulic pumps, hydraulic motors, valve assemblies, oil tanks, and drums, are housed in a cylindrical rotating drum. This design creates a compact internal structure that maximizes deck space utilization while minimizing interference with bridge visibility. The crane boasts exceptional lifting capacity, user-friendly operation, impact resistance, and excellent braking performance. It ensures high safety and reliability while delivering efficient loading/unloading operations and flexible maneuverability.

No tedious preparation work is required before operation. The hook can be attached to the grab to load and unload bulk goods, offering good adaptability to various materials and making it widely applicable.

Core Features

Rated lifting weight: 1200T (including the self-weight of the grab).
Working radius (amplitude): Up to 120 meters (the actual load varies with the amplitude).
Power mode: Electric drive (motor + frequency conversion control).
Core components: Equipped with an electric grab, which can automatically open and close to pick up bulk materials.

Main Structure and Composition

Metal Structure
Main beam: Box or truss structure to ensure high strength (material is usually Q345B).
Cylindrical cylinder: Supports the entire machine.
Rotating mechanism (if rotating): Allows 360° rotation (some fixed boom models do not rotate).

Hoisting Mechanism
The motor drives the winch system and lifts the grab through the steel wire rope.
Usually equipped with a double drum (supporting a double rope grab) or a single drum (electric hydraulic grab).

Boom Luffing Mechanism
The working radius (maximum 30 meters) can be adjusted by driving the boom with a motor.

Walking Mechanism (if mobile)
Track walking or tire type (e.g., gantry crane).

Motor Grab
Type: Double rope grab (mechanical control) or electric hydraulic grab (more precise).
Capacity: 3-5m³ (depending on material density, e.g., coal ~0.8t/m³, iron ore ~2.5t/m³).

Core Performance Parameters

Parameter	Typical Value
Rated lifting capacity	30 tons (including grab)
Maximum working radius	30 meters
Lift height	20-30 meters on the track, 10-20 meters under the track (customizable)
Hoisting speed	10-15 m/min (full load), 20-30 m/min (empty load)
Luffing speed	5-10 m/min
Rotational speed (if applicable)	0.5-1.5 rpm
Motor power	30-50kW (main lifting)
Power supply	380V/50Hz or high voltage 6kV/10kV (high power models)

Typical Application Scenarios

Ports/wharves: Loading and unloading bulk goods such as coal, ore, and grain.
Power plants/steel mills: Raw material yard storage and retrieval operations.
Large storage facilities: Bulk warehouse transfer.
Construction sites: Handling materials like sand and cement.

Product Advantages for 30t 30m Electric Grab Crane
Compact structure with a small tail rotation radius, improving deck space utilization.
Lightweight, easy to inspect and maintain, with strong wind resistance.
Customizable lifting, rotation, and amplitude capabilities to fully meet customer needs.

Main technical parameters

Parameter	Unit	ZD3030	ZD3538	ZD4538	ZD5045
Hoisting capacity	t	30	35	45	50
Working hours	m	7.5～30	12~38	5~38	12~45
Lifting altitude	m	36	34	30	40
Swiveling speed	r/min	0.7	1.2	0.8	1.3
Amplitude speed	m/min	25.5	35	19	55
Rise rate	m/min	50	50	44	40
Installed capacity	Kw	545	500	715	960
Conduct oneself with dignity	t	~102	~135	~155	~235

Can be customized according to customer requirements

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