LMI for Crawler Cranes:
A Safety Essential
The LMI system in a crawler crane is like its own safety coach. It keeps an eye on how much weight the crane is lifting, the angle of the boom, and how far the boom is extended. Using ensors and a computer, it calculates if the crane is getting close to its safe limits. If it detects any danger of overloading, it sounds an alarm to warn the operator, helping to prevent accidents and keep everyone safe.
Features :
* Load Monitoring: Continuous measurement of load weight during lifting operations.
* Boom length Monitoring: Tracking the position and configuration of the crane's boom.
* Radius Monitoring: Measurement of the distance between the load and the crane's center of rotation.
* Safety Limit Enforcement: Automatic restriction of crane movements to prevent overloading.
* Real-time Alerts: Instant visual and audible warnings to the operator in case of approaching or exceeding safe limits.
* User-Friendly Interface: Intuitive interface for ease of use by crane operators.
* Emergency Stop Mechanism: Immediate halting of crane operations in emergency situations.
* Calibration Features: Ensures accurate load measurements and system calculations.
| Item Name |
Inclinometer |
| Working principle |
Digital sensing |
| Accuracy |
0.1 |
| Input Voltage |
DC24V |
| Working Current |
20-40mA |
| Output Mode |
RS232 / RS485 / TTL |
| Temp Sensor |
-40 to 85ºC |
| IP Rating |
67 |
Main Display Unit:
The main display unit of an LMI system provides real-time data on load weight, boom position, and distance. If it senses potential risks, it alerts the operator through visual signals and sound, ensuring safe and precise crane operations.
Angle Sensor:
The Angle sensor in the LMI system acts like the crane's monitor for it's lifting arm. It constantly observes the arm's position, ensuring safe lifting. If there's a chance of lifting too much, it sends a warning to the operator for caution.
Load sensor:
The load sensor measures load induced strain using strain gauges, converting it to an electrical signal. Integrated into the LMI system, it calculateds load moments, ensuring real-time monitoring and safety.
A2B Limit Switch:
An A2B switch is a safety feature in cranes and industrial machinery. It prevents collisions between the crane hook and its upper part. If the hook get too close to the top, the switch activates, stopping the crane or triggering alarms to avoid accidents.
Hammer With Chain:
A hoist hammer with precise weight, smooth hook operation, and automatic power cut-off for safe, efficient use.
Application :
The Load Moment Indicator (LMI) system in crawler cranes finds major applications in a variety of industries where heavy lifting is required. Some of the major applications include:
* Construction: Crawler cranes equipped with LMI systems are commonly used in construction projects for tasks such as lifting heavy materials like steel beams, concrete panels, and precast elements. They are also used for erecting structural steelwork, placing heavy machinery, and assembling large components.
* Infrastructure Development: LMI-equipped crawler cranes play a crucial role in infrastructure development projects, including the construction of bridges, highways, tunnels, and dams. These cranes are used to lift and position heavy elements such as bridge girders, tunnel segments, and dam components.
* Infrastructure Development: LMI-equipped crawler cranes play a crucial role in infrastructure development projects, including the construction of bridges, highways, tunnels, and dams. These cranes are used to lift and position heavy elements such as bridge girders, tunnel segments, and dam components.
* Power Generation: Crawler cranes equipped with LMI systems are utilized in the power generation industry for tasks such as erecting wind turbines, installing power plant equipment, and maintaining infrastructure at power generation facilities, including nuclear, thermal, and renewable energy plants.
* Shipbuilding and Ports: Shipbuilding yards and ports utilize crawler cranes with LMI systems for lifting heavy ship components, containers, and cargo. These cranes play a critical role in loading and unloading operations, as well as in the construction and repair of ships and maritime infrastructure.
* Mining and Extraction: In the mining and extraction industry, crawler cranes equipped with LMI systems are used for tasks such as lifting heavy equipment, excavating machinery, and materials handling in mining operations, quarries, and mineral processing facilities.
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