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Yongmao tower cranes are divided into several types according to their structures and hoisting mechanisms.
The QTZ series is a type of tower crane with a trolley, which is the most common type of tower crane. The QTZ series Yongmao tower crane has similar features. It has a horizontal jib, a trolley, a vertical tower, and a hoisting mechanism. The QTZ series tower crane has a flexible lifting height and a wide application range, which is very suitable for construction in high-rise buildings and large-scale infrastructure projects.
The PT series is a kind of tower crane with a luffing jib. The PT series Yongmao tower crane has a luffing jib system, a tower, a trolley, and a hoisting mechanism. Because of the luffing jib system, the PT series tower crane can be adapted to complex construction sites with limited space. It can also be used in projects with strict requirements on the radius of tower cranes, such as urban renewal projects.
The topless tower crane is a kind of tower crane without a top, which has smaller space occupation. The topless tower crane has a horizontal jib, a trolley, a tower, and a hoisting mechanism. The unique feature of the topless tower crane is that the upper part is directly fixed to the building formwork or steel structure. This feature makes the tower crane have better stability and efficiency during construction. The topless tower crane is suitable for high-rise building construction projects. It can also meet the needs of fast construction.
The self-erecting tower crane is a type of tower crane that can be installed and removed independently. The self-erecting tower crane has a horizontal jib, a trolley, a tower, and a hoisting mechanism. The tower crane is usually transported to the construction site in sections. Then, the tower crane can be assembled by itself with the help of an auxiliary hoisting mechanism. The self-erecting tower crane does not need an external crane to assist in assembly, which improves construction efficiency and reduces assembly time. The self-erecting tower crane is suitable for projects with frequent movement requirements, such as small- to medium-sized construction projects and urban infrastructure construction.
Yongmao tower cranes have various specifications. The following are some:
Yongmao tower cranes have different lifting capacities, ranging from a few tons to dozens of tons. In addition, the lifting capacity of tower cranes is also affected by factors such as the length of the jib and the working radius (distance between the center of the tower and the load).
The maximum working radius of Yongmao tower cranes refers to the farthest distance that the tower crane can reach. It is determined by the length of the jib and the height of the tower. The maximum working radius affects the coverage area and the maximum lifting height of the tower crane.
Yongmao tower cranes have a wide range of maximum lifting heights, from several tens of meters to hundreds of meters, which can meet various construction needs. The maximum lifting height is primarily determined by the height of the tower and can be increased by adding tower sections.
Yongmao tower cranes are used in various construction scenarios, such as the following.
Yongmao tower cranes are frequently used in high-rise building construction. Their ability to lift and move heavy materials makes them essential for efficiently transporting steel, concrete, pre-fabricated elements, and other materials to the construction site at height. They also help assembly work and equipment installation, which increases the productivity and safety of the construction project.
In bridge construction, Yongmao tower cranes are commonly used to transport and place large components like beams, columns, and precast segments. They are often positioned on bridge piers or abutments to assist with assembly work and material handling. Their precise control and high lifting capacity are essential for ensuring the quality and efficiency of bridge projects.
Yongmao tower cranes are widely used for material handling and equipment installation in mining and resource extraction. In open-pit mines, they can assist with ore excavation, transportation, and loading. At mining sites, they are valuable for their ability to handle heavy materials and equipment, supporting the overall mining operations.
Yongmao tower cranes are well-suited for the construction of industrial facilities, such as power plants, manufacturing plants, and warehouses. They can handle large equipment and prefabricated structures, and their efficient material handling accelerates project timelines. Yongmao tower cranes also provide flexibility for assembly and installation tasks in complex industrial environments.
In marine construction projects, such as ports, harbors, and offshore infrastructure, Yongmao tower cranes play a critical role in material handling and equipment installation. They are used for tasks like loading and unloading ships, assembling offshore platforms, and installing maritime structures. The stability and lifting capacity of Yongmao tower cranes are well-suited to the challenging marine environment, supporting efficient and safe construction operations.
When selecting a Yongmao tower crane for a construction project, there are several vital factors to consider to ensure that the right model is chosen for the job at hand. The first step is to assess the project's requirements, such as the crane's maximum lifting capacity, the required jib length, the lifting height, the working radius, and the expected loads. The project's site conditions should also be taken into account, such as the available space for the installation of the tower crane, the ground conditions for the crane's foundation, and any height restrictions that may limit the tower crane's use.
The project's duration and crane utilization should be considered to determine whether a self-erecting or topless model is more suitable for the job. Self-erecting tower cranes are ideal for projects with shorter durations and more frequent relocations, while topless models may be preferable for projects with longer durations and continuous use. The project's budget and cost of crane operation should also be evaluated to ensure that the selected tower crane model aligns with the project's financial constraints. It is also important to select a tower crane model that is compatible with any other cranes or equipment being used on the project to ensure seamless integration and efficient operations.
Finally, it is essential to choose a reputable supplier or manufacturer of tower cranes and to consider factors such as the supplier's track record, technical support, and after-sales service to ensure a smooth procurement process and reliable support throughout the project's duration.
Q1: What are the Yongmao tower crane models?
A1: The most commonly used models are QTZ63, QTZ80, QTZ125, QTZ160, QTZ315, and QTZ500. The model name indicates the maximum load capacity and jib length of the tower crane. For example, the QTZ80-5613 model has a maximum load capacity of 8 tons and a jib length of 56 meters.
Q2: How are Yongmao tower cranes fixed to the ground?
A2: Tower cranes are anchored to the ground using a foundation that is specifically designed for the type and size of the crane. Common foundation types include concrete base slabs, grillages, and mat foundations. Professional engineers calculate the dimensions and reinforcement of the foundation to ensure stability and safety.
Q3: How are Yongmao tower cranes assembled and disassembled?
A3: The assembly and disassembly process of a tower crane is complex and requires trained operators and a specialized crew. It involves sequentially adding or removing mast sections, connecting electrical components, and securing the crane to its foundation. Safety measures, such as fall protection systems and proper rigging techniques, must be followed at all times.
