Crane overload limiter

Environmental Suitability of Crane Overload Limiter

1. High and Low Temperature Environments:
   • Crane overload limiters are capable of operating reliably in a wide temperature range, typically from -40°C to +85°C, making them suitable for both high and low-temperature conditions.
2. Moist and Waterproof Environments:
   • These limiters typically have an IP65 or higher protection rating, preventing water and dust from entering the device. This makes them ideal for use in humid, dusty, or harsh weather conditions.

Main Functions of Crane Overload Limiter

1. Load Monitoring and Overload Prevention:
   • The overload limiter continuously monitors the load on the hook and compares it to the crane’s rated capacity. If the load exceeds the safe limit, the system automatically restricts further lifting operations.
2. Automatic Alarm:
   • When the load approaches or exceeds the safety threshold, the system triggers an alarm, including audible and visual signals, alerting the operator to take corrective action and preventing further overload.
3. Operational Protection:
   • The overload limiter can interact with the crane’s control system to automatically reduce the lifting speed or completely halt further lifting operations, preventing damage to the equipment or safety hazards caused by overloading.
4. Data Storage and Analysis:
   • The limiter is usually equipped with data storage capabilities, allowing it to record historical load data, alarm information, and other operational details. This helps with post-operation analysis, diagnostics, and maintenance. Some models also support remote monitoring and data downloading.
5. Remote Control and Alerts:
   • Some models offer remote monitoring and control functions, enabling operators or managers to view load data and alarm information from a distance, improving overall safety during crane operations.

Working Principle

1. Load Measurement:
   • The crane overload limiter uses sensors, such as pressure sensors, tension sensors, or displacement sensors, to measure the load on the hook in real-time. The sensors send this data to the control system for processing.
2. Data Processing and Comparison:
   • Once the control system receives the sensor data, it compares the current load with the preset safety limit. If the load exceeds the limit, the system immediately triggers the alarm and activates the protective mechanism.
3. Alarm and Protection Mechanism:
   • When the load exceeds the safe threshold, the system activates the audible and visual alarm to warn the operator. Simultaneously, it automatically takes actions such as slowing down the lifting speed or halting further lifting to prevent equipment damage or safety incidents.
4. Real-Time Monitoring and Recording:
   • The overload limiter displays real-time load data on a screen and records historical data for later review. Some advanced models can transmit data remotely to a monitoring center, allowing for continuous observation by the operator or management team.
5. Adjustment and Optimization:
   • Some high-end overload limiters feature intelligent adjustment capabilities. They automatically adjust the load limit based on the changing working conditions, ensuring the crane always operates within the safety range.