1. Undirbúningur grunns fyrir uppsetningu turnkrana Það eru tvær tegundir af undirstöðum fyrir turnkrana: brautargrunnur og steyptur grunnur. Bygging brautargrunnsins ætti að uppfylla eftirfarandi kröfur:(1) Burðargeta undirlags: Fyrir ljós – vakthafandi turnkranar (með lyftigetu minni en 30kN), það ætti að vera 60 – 100kPa; […]
27
Feb.
Feb.
Ákveðið fyrirtæki tók að sér verkefni með 30 hæðir yfir jörðu, byggingarhæð 95m, og byggingarsvæði af 32,000 fermetrar. QTZ125(ZX6016) var notaður turnkrani sem framkvæmdaraðili útvegaði. Þessi turnkrani fylgdi ekki handahófskenndri rekstrarhandbók. Það var sett upp með því að setja inn 16-M36 bolta til að spenna, […]
27
Feb.
Feb.
Sumir hratt – samsetning lægri – Sveigjanlegur turnkranar með sjónauka turni – líkamsbyggingar og láréttar bómur (eins og QT16 – gerð turnkrana) Ljúktu að mestu byggingu og uppsetningu samkvæmt þessari aðferð. Uppsetningarferlið er sem hér segir: (1) Uppsetning stoðfötanna Dragðu út stoðfötin fjögur og lækkuðu […]
18
Feb.
Feb.
Introduction With the rapid development of construction technology and the increasing demands for safety, efficiency, 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 […]
14
Feb.
Feb.
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 […]
20
Jan
Jan
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 […]
17
Jan
Jan
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 […]
17
Jan
Jan
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. Hins vegar, due to prolonged usage, […]
16
Jan
Jan
ég. 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 […]
12
Jan
Jan
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. Þess vegna, 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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