Introduction
The grab consists of grab body (jaws), crossbeam, connecting rod mechanism, drive device (electric hoist/hydraulic cylinder/pneumatic cylinder) and lifting lugs. The jaws are welded from high-strength wear-resistant steel plates, and the cutting edges adopt high-manganese steel or wear-resistant alloy, wear-resistant and durable. During operation, the grab opens and descends to the bulk material pile, the drive device drives the two jaws to close through the connecting rod mechanism, grabbing the bulk material into the bucket; after lifting to the destination, the jaws open to unload the bulk material, completing one grabbing cycle. Double-jaw grabs are suitable for small and medium particle bulk materials such as coal, sand and grain; multi-jaw grabs (clamshell grabs) are suitable for irregular large block materials such as ore, scrap steel and large garbage; electric grabs have built-in motors and reducers, powered by cables; hydraulic grabs are equipped with hydraulic pump stations, with large grabbing force and stable action; pneumatic grabs are suitable for explosion-proof occasions. The grab can be used with bridge cranes, gantry cranes, ship unloaders, etc., serving as an efficient special sling for bulk material loading/unloading operations, widely used in bulk cargo loading/unloading at ports, ore and coal transfer at steel mill raw material yards, coal yard reclaiming at power plants, ore loading/unloading at mines, bulk grain transfer at grain depots, garbage grabbing at waste treatment plants.
Application
Our Advantage
Specially designed for bulk material grabbing, jaw opening and closing automatically completes grabbing and unloading, no manual loading and unloading needed, short single grabbing cycle time, loading/unloading efficiency over 10 times higher than manual handling, especially suitable for mass bulk material continuous loading/unloading operations at ports, steel mills and power plants.
Automatically controls jaw opening and closing through electric, hydraulic or pneumatic drive devices; operators only need to control grabbing, lifting and unloading actions in the crane cab, no manual assistance needed, simple operation and low labor intensity; can be linked with cranes to achieve automated operation, greatly reducing labor costs.
Double-jaw, multi-jaw, electric, hydraulic, pneumatic and other types optional; double-jaw suitable for small and medium particle bulk materials such as coal, sand and grain, multi-jaw suitable for large block irregular materials such as ore and scrap steel, can be flexibly selected according to material type, particle size and density, adapting to different industry needs such as ports, steel mills, power plants, mines, grain depots and waste treatment.
Jaws are welded from high-strength wear-resistant steel plates, cutting edges adopt high-manganese steel or wear-resistant alloy, with high hardness, wear resistance and impact resistance after heat treatment; connecting rod mechanism adopts alloy steel pins, flexible rotation and strong load capacity; normal service life over 5 years, suitable for continuous grabbing of highly abrasive bulk materials such as ore and coal, low maintenance cost.
Electric/hydraulic drive grabs amplify grabbing force through the connecting rod mechanism, jaws close tightly with high grabbing rate and less material spillage; hydraulic grab grabbing force can reach tens of tons, can grab dense and caked bulk materials; multi-jaw grab jaws can insert deep into the material pile, strong ability to grab large block and irregular materials, grabbing efficiency and filling rate far higher than manual and simple slings.
Specification
| Parameter | 0.5~2t | 3~5t | 10~16t | 20~32t |
| Rated Capacity | 0.5/1/2t | 3/5t | 10/16t | 20/32t |
| Opening | 20~50mm | 50~80mm | 80~120mm | 120~200mm |
| Hook Body Dia. | Φ15~Φ30mm | Φ30~Φ45mm | Φ45~Φ70mm | Φ70~Φ100mm |
| Shank Dia. | Φ20~Φ35mm | Φ35~Φ55mm | Φ55~Φ80mm | Φ80~Φ120mm |
| Curvature Radius | 30~60mm | 60~100mm | 100~150mm | 150~250mm |
| Safety Factor | ≥5 | ≥5 | ≥5 | ≥5 |
| Radiant Heat Temp. | ≤200°C | ≤200°C | ≤200°C | ≤200°C |
| Hook Body Material | 20CrMnTi/42CrMo | Same as Left | Same as Left | Same as Left |
| Heat Treatment | Normalizing + Tempering + Surface Hardening | Same as Left | Same as Left | Same as Left |
| Hook Body Hardness | HB220~260 | Same as Left | Same as Left | Same as Left |
| Anti-fall Device | Spring-reset Anti-Disengagement | Same as Left | Same as Left | Same as Left |
| Heat Insulation Device | Insulation baffle (Optional / Standard) | std | std | std |
| Rotation Function | Thrust bearing free rotation | Same as Left | Same as Left | Same as Left |
| Weight | 2~15kg | 15~40kg | 40~120kg | 120~300kg |
| Matching Hoist | 0.5~2t | 3~5t | 10~16t | 20~32t |
