Noticias del sector
Dock portal cranes are mainly used at ports, docks, yards, and other places to complete loading, unloading, and transfer operations of ships and vehicles carrying goods. Its design, manufacturing, and inspection comply with advanced domestic and international standards such as DIN, FEM, IEC, AWS, GB, as well as the latest national standards.
Existen dos tipos de grúas pórtico de muelle en función de la estructura de la pluma:
Pluma única y enganche de cuatro barras. La grúa de pórtico de un brazo has a simple structure, a large lifting capacity, and a light self-weight. It has its boom at a certain angle to the column, and is driven up and down by hydraulic cylinders. Usually, the length of the boom is long and the covering area is small, but it has high rotational flexibility. It is suitable for small span operations, but can only achieve movement in a single direction.
The four-bar linkage portal crane adopts a combined boom system to achieve horizontal movement of goods during the amplitude change process. It has the characteristics of a small horizontal drop, smooth amplitude change, and low power consumption. This type of portal crane is mainly suitable for large-scale lifting operations. It has a wider support area, shorter relative arm frame, and can carry greater weight. Both types of portal cranes can meet the loading and unloading requirements of general cargo, bulk cargo, and containers. They both have the characteristics of a wide application range, high operational efficiency, and stable overall operation. Not only can it move horizontally and vertically, but it can also perform a rotation function, making it more flexible.
In addition, floating portal cranes, one is the elephant trunk type boom and the other is the truss type boom, are fixed on the ship, self-generating. And it can move at any time according to the usage situation, which is much more cost-effective.
To overcome the deficiencies in the background technology and solve existing technical problems. Weihua has disclosed a new type of portal crane with variable amplitude stability in 2023, which can improve the stability of the variable amplitude process for lifting heavy objects. By connecting the column and the flat arm frame through a pull rod, we can install the flat arm frame on the turntable in a horizontal position. The arm body can withstand a large suspension weight.
Therefore, a pulley traction mechanism can directly drive the lifting trolley to move along the axial direction of the flat arm frame, realizing the amplitude change action of the lifted object. In addition, a tension mechanism is set up to ensure the stability of the pulley traction mechanism's operation. Compared with traditional portal cranes, this portal crane has a simpler structure, a more stable amplitude change method, which is easy to maintain and provides precise control.
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