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Lightweight Design and Manufacturing of Bridge Cranes — Lightweight Gantry Structures

Lightweight Design and Manufacturing of Bridge Cranes — Lightweight Gantry Structures

Bridge-type lifting machinery is widely used in key sectors of the national economy, including metallurgy, equipment manufacturing, transportation and logistics, and shipbuilding, playing an indispensable and vital role in economic development. As one of the crane's primary structural components, the lightweight design of the bridge girder is particularly critical—and represents a significant advancement in the evolution of bridge cranes. Modern lightweight crane bridge girders typically feature a four-beam structure, with the main beams constructed as narrow-flange, fully offset-girder welded box beams. This design ensures that the trolley wheel pressure is efficiently transferred directly through the track to the weld joint connecting the top flange plate to the main web plate.

2020-02-13

Sichuan's new type of crane trolley features low manufacturing costs and minimal energy consumption during operation.

Sichuan's new type of crane trolley features low manufacturing costs and minimal energy consumption during operation.

Traditional crane trolley frames typically feature an indeterminate structural layout, with component technologies and design arrangements that lack optimization. This results in a bulky and heavy overall machine. Most conventional trolley frames are constructed as indeterminate, rigid frameworks welded together from two end beams, multiple cross beams, and numerous reinforcing ribs—on top of which thick steel plates are often laid. As a result, the traditional trolley frame design not only suffers from drawbacks such as high weight, elevated costs, complex structure, intricate welding processes, and excessive rigidity, but it also tends to suffer from issues like three-point wheel contact, uneven wheel load distribution, and wheel flange wear on the rail. These problems significantly compromise both operational safety and the service life of the crane.

2020-02-13

Which is better, a bridge crane or an gantry crane—and how should you choose?

Which is better, a bridge crane or an gantry crane—and how should you choose?

Which is better—bridge cranes or gantry cranes? Choosing between them depends on your specific needs. Currently, bridge cranes and gantry cranes are the most widely used types of lifting equipment, with bridge cranes being the dominant choice. A bridge crane consists of a trolley that moves along fixed support pillars spanning across a building’s structure. It can be categorized into several types, including general-purpose bridge cranes, power plant bridge cranes, explosion-proof bridge cranes, electric single-beam bridge cranes, electric single-beam suspended bridge cranes, electric hoist bridge cranes, metallurgical bridge cranes, and insulated bridge cranes. These cranes are commonly employed for loading, unloading, and lifting heavy materials, both indoors and outdoors—though indoor applications are more prevalent. One key advantage of bridge cranes is that they don’t occupy valuable workspace during operation.

2020-02-13

Online inspection reporting for lifting equipment cuts inspection time in half; web-based inspections for lifting machinery are expected to be rolled out nationwide.

Online inspection reporting for lifting equipment cuts inspection time in half; web-based inspections for lifting machinery are expected to be rolled out nationwide.

Online inspection reporting for lifting equipment cuts inspection time in half; nationwide rollout expected starting August. Starting in August, special equipment such as cranes used by companies in the free trade zone will be subject to online inspection reporting, significantly reducing the time required for inspections—by up to 50%. Recently, a reporter learned from Xiamen’s Quality and Technical Supervision Bureau that the bureau will begin implementing online reporting for special equipment used by businesses within the zone. This move is set to halve inspection times while also enhancing data accuracy and efficiency. Currently, inspecting lifting equipment involves a cumbersome process: submitting multiple paper-based inspection applications and waiting for physical reports, often requiring organizations to make several round-trip visits. However, with the introduction of online reporting, these time-consuming steps will be streamlined, making the entire process far more convenient and less resource-intensive.

2020-02-13

Elevator "human-trapping" incidents are on the rise, underscoring the need for enhanced safety in lifting and machinery equipment.

Elevator "human-trapping" incidents are on the rise, underscoring the need for enhanced safety in lifting and machinery equipment.

Recent frequent incidents of elevators "swallowing" or "strangling" people have once again brought elevator safety—and, by extension, the safety of lifting equipment—into sharp focus. Today, cranes are used extensively across industrial societies; virtually anything too heavy for manual handling relies on lifting machinery. These devices encompass a wide range of types, including bridge cranes, gantry cranes, mobile cranes, tower cranes, jacks, stackers, winches, and more. Given their widespread application across diverse industries and operational environments, as well as their critical role in production and business activities, the safety performance of lifting equipment has become a top priority for industry professionals. Crane safety, however, goes beyond just the quality and reliability of the equipment itself—it also involves ensuring proper maintenance, operator training, and adherence to strict safety protocols.

2020-02-13

Crane wheels gnaw at the rails—crucial impact of crane trolley wheels

Crane wheels gnaw at the rails—crucial impact of crane trolley wheels

During operation, the crane's trolley wheels may experience lateral sliding against the rail due to certain factors, causing the wheel flanges to tightly press against the rail and significantly increasing running resistance. This phenomenon, which leads to wear on both the wheel flanges and the rails, is known as "rail biting." Rail biting drastically shortens the service life of both wheels and rails—and in severe cases, it can even cause the crane to derail, resulting in equipment damage, injuries, or even fatalities. Additionally, rail biting can cause varying degrees of damage to the rail fastenings as well as to the supporting beams (or subgrade). 1. Rail biting caused by inaccurate wheel installation: (1) Excessive horizontal deviation of the wheels. This is one of the most common reasons for rail biting in bridge crane trolley wheels.

2020-02-13

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Wind power equipment: Keep half your mind awake, and let the other half drift in a dreamy haze.

2020-02-13

The industry is experiencing explosive growth, reshaping the competitive landscape of the wind power equipment sector.

2020-02-13

The Ministry of Finance clarifies the detailed rules for the use of special funds allocated to the wind power equipment industry.

2020-02-13

Three Major Favorable Policies Supporting the Machinery Industry in 2009

2020-02-13

National Administration of Quality Supervision: Notice on Opinions Regarding the Rectification Work for Metallurgical Lifting Machinery

2020-02-13

A 4 trillion yuan investment boost fuels hopes for the lifting equipment industry's rebirth.

2020-02-13

Chengdu Chengde Heavy Forging Co., Ltd.

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