Grabs, as specialized equipment for material handling, can be classified into four main types based on their structural characteristics and application scenarios: double-jaw/ clamshell grabs, multi-claw/orange peel (lotus) grabs, hydraulic grabs, and specialized grabs.
Structure: Composed of two jaws that open and close to grab materials.
Application: Suitable for handling granular and powdered materials, such as coal, ore, and sand. When dealing with materials larger than 100mm or more solid substances, the jaws can be made with teeth to improve gripping ability.
Characteristics: Simple structure, easy operation, and wide application range.
Multi-Claw/ Clamshell Grabs
Structure: Typically has six or more claws, with the claw tips forming sharp angles.
Application: Designed for materials that are difficult for clamshell grabs to penetrate, such as large, hard ore, aluminum ingots, iron filings, and scrap steel.
Characteristics: Strong gripping force, suitable for handling large and irregularly shaped materials.
Structure: Driven by hydraulic cylinders to open and close the jaws, with shapes including shell-type and orange-segment-type.
Application: Widely used in hydraulic excavators, lifting towers, and other equipment for handling waste steel, dredging, garbage disposal, and other tasks.
Characteristics: High gripping force, precise control, and suitable for heavy-duty and complex working environments.
Specialized Grabs
Types: Include timber grabs, anti-leakage grabs, straw grabs, dredging grabs, and wireless remote-control grabs.
Application:
Timber grabs: For handling long logs and pipes.
Anti-leakage grabs: For handling grain, fertilizer, cement, and other powdered materials to prevent leakage.
Straw grabs: For handling agricultural straw and other loose materials.
Dredging grabs: For underwater dredging of mud, sand, and loose rocks.
Wireless remote-control grabs: For remote operation in hazardous or inaccessible environments.
