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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Vasaris
Vasaris
Tam tikra įmonė ėmėsi projekto su 30 grindys virš žemės, 95 m pastato aukštis, ir statybos zona 32,000 kvadratiniai metrai. A QTZ125(ZX6016) Kūrėjo pateiktas bokšto kranas buvo naudojamas. Šis bokšto kranas nebuvo su atsitiktine veikimo vadovu. Jis buvo sumontuotas įterpiant 16-M36 varžtus įtempimui, […]
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Vasaris
Vasaris
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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Vasaris
Introduction With the rapid development of construction technology and the increasing demands for safety, efektyvumą, and energy conservation, tower cranes play an essential role in modern construction projects. Among the key components of tower cranes, the hoisting mechanism is crucial for lifting and lowering loads safely and efficiently. Traditional hoisting mechanisms typically rely on mechanical […]
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Vasaris
Vasaris
As a type of lifting and transportation machinery, large tower cranes are prone to rust and corrosion due to various unresolved issues. The steel structures of large tower cranes are particularly susceptible to rusting when exposed to air for extended periods without adequate protective measures. This corrosion occurs when the steel structure reacts chemically with […]
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sausio mėn
sausio mėn
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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sausio mėn
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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sausio mėn
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. Tačiau, due to prolonged usage, […]
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sausio mėn
aš. 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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sausio mėn
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. Todėl, 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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