1. Foundation Preparation before Tower Crane Installation There are two types of foundations for tower cranes: track foundation and concrete foundation. The construction of the track foundation should meet the following requirements:(1) Subgrade Bearing Capacity: For light – duty tower cranes (with a lifting capacity of less than 30kN), it should be 60 – 100kPa; […]
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A certain company undertook a project with 30 floors above the ground, a building height of 95m, and a construction area of 32,000 square meters. A QTZ125(ZX6016) tower crane provided by the developer was used. This tower crane did not come with a random operation manual. It was installed by embedding 16-M36 bolts for tensioning, […]
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فوریه
فوریه
Some fast – assembly lower – slewing tower cranes with telescopic tower – body structures and horizontal booms (such as the QT16 – type tower crane) mostly complete the erection and installation according to this method. The installation procedure is as follows: (1) Setting up the Outriggers Pull out the four outriggers and lower the […]
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فوریه
مقدمه با توسعه سریع فناوری ساخت و ساز و افزایش خواسته های ایمنی, کارایی, و حفظ انرژی, جرثقیل های برج نقش اساسی در پروژه های ساختمانی مدرن دارند. از جمله مؤلفه های اصلی جرثقیل برج, مکانیسم بالابر برای بلند کردن و کاهش بارهای با خیال راحت و کارآمد بسیار مهم است. مکانیسم های بالابر سنتی به طور معمول به مکانیکی متکی هستند […]
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فوریه
فوریه
به عنوان نوعی ماشین آلات بلند کردن و حمل و نقل, جرثقیل های برج بزرگ به دلیل مشکلات مختلف حل نشده مستعد زنگ زدگی و خوردگی هستند. سازه های فولادی جرثقیل های برج بزرگ به ویژه در هنگام قرار گرفتن در معرض هوا برای مدت طولانی بدون اقدامات محافظ کافی ، مستعد زنگ زدگی هستند. این خوردگی زمانی رخ می دهد که ساختار فولاد با شیمیایی واکنش نشان می دهد […]
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ژان
Tower crane operations involve significant risks, particularly during lifting tasks. To minimize accidents and ensure safe operation, the following preventive measures are recommended: 1. Enhancing Safety Awareness Objective: Strengthen workers’ awareness of safety protocols. Promote adherence to established regulations to reduce unsafe behaviors. Implementation: Conduct regular safety training sessions. Integrate safety drills into routine operations […]
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To adjust the rotational speed of an asynchronous motor, we can start with changing the following three parameters: the number of pole pairs of the stator winding, the slip ratio of the motor, and the frequency of the power supply. Changing the first parameter affects the synchronous speed. Changing the second parameter only enables speed […]
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Introduction to Tower Crane Reducer Housings The reducer housing of a tower crane serves as a critical structural component, providing support and protection to the gears and mechanical parts inside. Manufactured primarily from cast iron, typically of grade HT150, these housings are designed to withstand significant mechanical stress during operation. با این حال, due to prolonged usage, […]
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من. Purchase (Rental) of Tower Cranes 1. Purchase of Tower Cranes When purchasing a tower crane, it must be bought from a professional manufacturer with a valid production license. The manufacturer should provide technical documents such as the whole-machine certificate, quality guarantee for high-strength connecting bolts, quality guarantee for hoisting wire ropes, quality guarantees for […]
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Tower cranes are large-scale hoisting machinery commonly used in building construction. Due to the structural characteristics of tower cranes, the tower body bears relatively large eccentric bending moments. بنابراین, their installation and dismantling require strong technical skills, and safety management is rather difficult. A slight oversight can lead to major accidents with the destruction of […]
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