EN
The application scenarios of bulk material transfer are continuously expanding. They include port bulk cargo handling, mine ore grasping, scrap steel recycling sorting, riverbed dredging, power plant coal loading, and domestic waste disposal, etc. The hardness, density, shape, and working environment of the materials vary significantly. General-purpose grabs cannot adapt to various working conditions for long-term stable operation. In the past, industries mostly relied on a single general model to cover all requirements. The high-hardness materials were prone to wear and tear, the light-weight powder materials were prone to spillage during transportation, the corrosion speed in coastal conditions was accelerated, and the shortcomings of adapting to specific scenarios have long constrained the operation efficiency. Yantai Quansheng Machinery has divided multiple series of grab products based on material properties and working environments, adjusted the structure of the bucket body, the opening and closing power, and the configuration of the liner plates, promoting the manufacturing industry of grabs to shift from general mass production to scene-specific development.
The double-paddle grab has a stronger closed-sealing performance and a more regular internal space, suitable for the transportation of granular and powdery bulk materials such as coal, sand, and grains. The structure of the paddle blades is optimized to reduce the spillage of materials during loading and unloading, and is suitable for continuous operations such as port unloading and storage yard transportation. The multi-paddle grab has a large opening and closing range, and the independent paddle bodies can adapt to irregular block-shaped materials. It is widely used in scrap steel, stone, and construction waste recycling scenarios. The single-paddle design is independently stressed, and the force distribution of grasping irregular-shaped materials is uniform, reducing the impact loss of local steel plates. The two types of machine models have different structural design logic and cannot be used randomly. Using multi-paddle models for powder material transportation will result in gaps and material leakage, and using double-paddle models for grasping large scrap steel is prone to unstable clamping and sliding problems.
The hydraulic drive and mechanical steel wire rope traction grabs are adapted to different working conditions respectively. The mechanical grab relies on the linkage of steel wire ropes for opening and closing, with a simple overall structure and fewer daily maintenance parts, suitable for low-frequency and light-load storage yard operations; the hydraulic grab relies on the oil cylinder to provide continuous closing force, with stable grasping force output, and is more suitable for high-frequency, heavy-load mines, waste incineration plants, etc., and can be flexibly switched between operation positions by combining with vehicle-mounted or fixed lifting equipment. Some manufacturers only replace the driving parts, while the main bucket body retains the general structure, which cannot match the continuous closing force of the hydraulic system and causes the bucket body to deform under long-term high-pressure conditions. Quansheng has independently designed the load-bearing frame of the bucket body for the two driving systems, adding a thicker hinge seat and main beam structure for the hydraulic model, and matching it with continuous high-pressure opening and closing loads.
Outdoor coastal and underwater dredging scenarios require corrosion-resistant models of grabs. Long-term contact with seawater and silt is prone to rust and jamming. Quansheng has made multi-layer anti-corrosion coating for these models, adding waterproof and dustproof sealing structures at the hinge joints to block the invasion of mud and salt fog into the pin shaft gap. Indoor solid waste and chemical material transportation grabs are equipped with anti-tangling and anti-leakage structures to avoid fibers and soft waste from winding around the hinge mechanism and reduce the frequency of manual shutdown and cleaning. Most copycat manufacturers only change the appearance size, without substantive optimization of the internal load-bearing, sealing, and liner plate. They cannot solve the core pain points of specific scenarios.
The trend of refined operation in the material transportation industry is clear. Downstream enterprises pay more attention to loading and unloading losses and equipment maintenance hours. Special grabs adapted to specific working conditions can continuously optimize on-site operation efficiency. The demand in the port, mining, and recycled resource recovery industries in the Jiaodong region is stable, providing a broad application space for the development of grab sub-products. Quansheng has deeply engaged in the research and production of grabs for different scenarios, and has also provided dedicated wear-resistant liners, pin shafts, and easily worn materials for the bucket teeth to form an overall equipment and consumable matching solution. Customized development for specific scenarios will become the long-term development mainline of the grab industry. Adjusting the overall machine structure and supporting components to match various working conditions can continuously and stably connect with the long-term supporting orders of various enterprises.
