High Quality Clamshell Grab Bucket Overhead Crane Double Girder Bridge Crane with Grappler

double girder overhead crane with grab.webp

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Capacity:20t

Lifting Height:26m

Voltage/Hertz:customized

Brand Name: YUNTIAN

Place of Origin: Henan, China

Product manual

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Introduction

Technical Data (General Version)

Application

Features

PRODUCT INTRODUCTION

The Clamshell Grab Bucket Double Girder Overhead Crane is a heavy-duty bulk material handling solution designed for power plants, steel mills, ports, mining sites, and waste management facilities. Built on a robust double box-girder bridge structure, it is equipped with a four-rope mechanical clamshell grab bucket that is capable of opening and closing at any height, with strong gripping force and a high fill rate, effectively preventing material spillage during lifting and travel. The crane is engineered for continuous high-cycle operation with work duty classes from A6 to A8. It can be configured for manual, semi-automatic, and fully automatic control, with manual priority always available, making it suitable for environments requiring frequent, high-intensity handling of coal, ore, sand, grain, scrap metal, slag, and other loose bulk materials.

TECHNICAL DATA

APPLICATION

Coal-fired and thermal power plants

Steel mills and metallurgical processing facilities

Ports, docks, and bulk cargo terminals

Mining and mineral processing sites

Municipal solid waste incineration plants

Cement and construction material factories

FEATURES

Four-rope mechanical clamshell grab system — Two hoisting ropes and two closing ropes work together through independent drums. The grab opens and closes precisely at any height, delivers strong gripping force, and seals tightly to minimize material spillage. Applications range from 0.5 m³ to over 15 m³ bucket capacity, matched to material density and payload requirements.

Double box-girder structure for heavy-duty stability — Two parallel main girders provide superior load distribution, bending and torsional resistance. Compared with single-girder designs, this configuration ensures stable, low-deflection operation under continuous heavy loads across wider spans (10–35 m+).

Multi-mode control with manual, semi-automatic, and fully automatic operation — The crane supports three freely switchable control modes, with manual priority retained in all automatic modes. Fully automatic operation includes auto-grabbing, weighing, feeding, and return-to-position functions, substantially raising daily throughput.

Advanced safety and protection — Standard systems include overload limiters, upper and lower limit switches, emergency stop, phase sequence protection, travel limit switches, anti-collision devices, and polyurethane buffers to absorb impact energy. Protection levels range from IP44 to IP54 for harsh environments.

Flexible operator interface — Control options include pendant push-button station, radio remote control, and enclosed cabin operation. Remote and cabin configurations give operators clear visibility and safe working distance in dusty, high-temperature, or high-humidity conditions.