What is the torque limit of the tower crane?
As an indispensable large-scale mechanical equipment on construction sites, the safety performance of tower cranes has always attracted much attention. Recently, discussions about tower crane torque limits have become a hot topic, especially in the context of production safety month and safety inspections in the construction industry. This article will introduce in detail the definition, function, working principle and related data of tower crane torque limit to help readers fully understand this important safety device.
1. Definition of tower crane moment limit
Tower crane torque limiter, also known as torque limiter, is a safety protection device on the tower crane. Its main function is to monitor the torque changes of the tower crane during operation to prevent safety accidents caused by overloading or imbalance. The torque limiter monitors the load and arm length of the tower crane in real time, calculates the current torque value, and automatically cuts off the power or issues an alarm when the set threshold is exceeded to ensure that the tower crane operates within a safe range.
2. The function of tower crane moment limit
The torque limiter plays a vital role in the operation of the tower crane. Its specific functions include:
| function | Description |
|---|---|
| Prevent overloading | When the weight of goods lifted by the tower crane exceeds the rated load, the moment limiter will trigger the protection mechanism to prevent equipment damage or overturning. |
| Ensure balance | By monitoring changes in arm length and load, it is ensured that the tower crane maintains mechanical balance during operation. |
| Improve security | Reduce accidents caused by operating errors or equipment failures, and protect the safety of construction workers and the surrounding environment. |
3. Working principle of tower crane torque limiter
The working principle of the torque limiter is based on mechanical calculations and mainly includes the following steps:
| steps | Description |
|---|---|
| 1. Data collection | The load weight, arm length angle and other data of the tower crane are collected in real time through sensors. |
| 2. Moment calculation | According to the formula: moment = load × arm length, calculate the current moment value. |
| 3. Threshold comparison | Compare the calculated torque value with the set safety threshold. |
| 4. Trigger protection | If the torque exceeds the threshold, the power supply will be automatically cut off or an audible and visual alarm will sound. |
4. Relevant data of tower crane moment limit
The following are statistics related to tower crane moment limits in recent years, reflecting its importance in safe production:
| Statistics Project | data |
|---|---|
| Proportion of tower crane accidents due to overloading | about 35% |
| Accident rate of tower cranes equipped with torque limiters | Reduced by more than 60% |
| National standards for torque limiters | GB/T 5031-2019 "Tower Crane" |
5. Maintenance and inspection of tower crane moment limit
In order to ensure the normal operation of the torque limiter, regular maintenance and inspection are essential. The following are common inspection items:
| Check items | Frequency |
|---|---|
| Sensor sensitivity test | once a month |
| Electrical wiring inspection | Quarterly |
| threshold calibration | once a year |
6. Conclusion
The tower crane moment limit is a key device to ensure the safe operation of the tower crane, and its importance cannot be ignored. By understanding its definition, function, working principle and related data, the value of torque limiters in the construction industry can be better understood. At the same time, regular maintenance and inspection are also important means to ensure its effectiveness. I hope this article can provide readers with valuable information and promote the popularization of safe tower crane operation.
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