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High-speed railway
2023-01-11
A bridge-erection machine is equipment used to place precast girders onto prefabricated piers. As a type of crane, its primary function is to lift the girders and then transport and lower them into position.
2023-01-07
Crane traveling mechanisms typically employ only four driving and idler wheels. When lifting very heavy loads, the number of wheels is usually increased to reduce wheel pressure. With more than four wheels, a hinged balancing frame must be used to ensure that the crane’s load is evenly distributed among all wheels.
2023-01-07
What are the precautions for operating a crane?
When the crane is operating on a clear, obstacle-free route, the bottom of the hook or lifting attachment and the lifted load must be kept at least 2 meters above the ground. If the crane needs to pass over an obstacle, it must clear the obstacle by at least 0.5 meters.
2023-01-07
Operation and Maintenance of Cranes
Prior to shipment, cranes shall be properly labeled and documented. Before equipment installation, a safety inspection and maintenance shall be conducted: verify the functional integrity of the main mechanisms; inspect visible defects in the primary steel structure, connections, pins, and bolts; assess the condition of the anti-corrosion coating on the equipment surface; document all findings; and issue installation recommendations.
2023-01-07
To ensure the safety and reliability of lifting operations, cranes are equipped with comprehensive safety devices that protect machine components and alert the operator in the event of an accident, thereby providing effective safety protection.
2023-01-07
A column-mounted jib crane consists of a jib that can rotate around a fixed column mounted on a base, or it may comprise a single column and a jib that is connected only to a rotating column and pivots about the vertical central axis of the base support. It is suitable for applications with limited lifting capacity and a service area that is circular or sector-shaped. Such cranes are typically used for gripping and handling workpieces, such as machine tools.
2023-01-07
A bridge-type crane is a type of overhead crane that operates on elevated tracks, also known as an overhead traveling crane. The crane bridge travels longitudinally along the tracks installed on both sides of the elevated bridge, while the hoisting trolley moves laterally along the tracks mounted on the bridge, thereby defining a rectangular working area. This configuration enables efficient lifting and handling of materials while making full use of the space beneath the bridge and avoiding interference from ground-level equipment.
2023-01-07
What are the classifications of cranes?
Crane equipment used in bridge construction is generally classified into four major categories based on their structure and performance: light and small lifting devices, bridge cranes, jib cranes, and cable cranes.
2023-01-07
Performance Parameters of Cranes
The main parameters of a crane are those that represent its primary technical performance characteristics; they form the basis for crane design and serve as an important reference for safety technical requirements.
2023-01-07
Current Market Situation of Cranes
In October 2011, overall sales in China’s construction machinery industry remained sluggish. Specifically, excavator sales fell by 29.92% year on year, while bulldozer sales declined by 21.34% year on year. Throughout 2011, macroeconomic regulatory measures implemented by the Chinese government led to credit tightening, which in turn slowed down some ongoing projects and postponed others that had originally been scheduled to commence. At the same time, consumers’ reduced purchasing power resulting from tighter credit conditions further dampened demand for construction machinery.
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