The selection of hydraulic multi-lobed grabs needs to be based on six core parameters: rated load, bucket capacity, closing pressure, number of lobes, material and manufacturing process, and drive method. Optimization should be performed in conjunction with the specific requirements of the operational scenario.
More detailed core hydraulic system specifications of the hydraulic orange peel grab bucket for reference
| Item | Core parameters | Industry benchmark range | Selection criteria and recommendations |
|---|---|---|---|
| Rated Loading |
Maximum gripping force(t) |
3.2 - 63T |
- Port scenarios: For handling bulk cargo (such as coal and ore), it is recommended to choose equipment with a capacity of ≥25 tons to ensure stability in strong winds and waves. - Metallurgical scenarios: For handling large scrap steel blocks (≥1.2 meters), it is recommended to choose equipment with a capacity of ≥40 tons to avoid overload risks. |
| Volume | Volume(m³) | 0.1 - 60m³ | - Coal loading and unloading: A bucket capacity of 4-8 m³ is preferred to balance the amount of material grabbed at one time with the equipment's own weight. - Scrap steel handling: A bucket capacity of 2-4 m³ is recommended to accommodate the grabbing density and operational flexibility of irregular materials. |
| Opening and closing pressure | Working system pressure(MPa) | 180 - 250MPa |
- High-density materials (such as iron ore and scrap steel): Require a pressure of ≥210MPa to ensure penetration and gripping strength. - Low-density materials (such as biomass and light ores): 180-200MPa is sufficient. |
| Bucket structure | Number of buckets | 4 - 8buckets |
- Bulk cargo handling (e.g., coal, sand, and gravel): The simplified 4-petal design reduces the failure rate. - Scrap steel handling: The 6-8 petal design increases gripping points and improves adaptability to irregular materials. |
| Material technology | Grab bucket body material | Q345B / Hardox 500 |
- For general applications: Q345B structural steel meets the basic wear resistance requirements. - For high-wear applications (such as mines and scrap yards): Hardox 500 high-strength steel must be used, increasing service life by 3-5 times. |
| The way of drive | Hydraulic / Electric/Electro-hydraulic | Hydraulic drive proportion 61.3% |
Traditional operating scenarios: Hydraulic drives are mature, reliable, and have low maintenance costs. - Automated terminals: Electro-hydraulic drives are preferred, supporting remote control and data interaction, and adapting to intelligent upgrade requirements. |
