According to the operation structure, the crawler crane can be divided into several functions, such as crawler travel, slewing, lifting and luffing. The crawler crane has good site operation performance, which exceeds that of the truck crane. The main risk factors affecting its safety are the stability of the foundation, whether it is overloaded or sudden gust, etc. its safety device requires torque limiter, weight limiter, hook height or depth limiter, etc. It is mainly used for engineering construction. Such as roads, bridges, buildings, emergency rescue, etc. General engineering teams are required for road and bridge construction and power installation departments.

Crawler crane is composed of power device, working mechanism, boom, turntable and chassis. It is a multi section assembled truss structure. The length can be changed after adjusting the number of sections. The lower end is hinged on the front of the turntable, and the top end is suspended and supported by a luffing wire rope pulley block to change its inclination.

There are also cases where the jib is installed at the top of the boom, and the jib and the boom form a certain angle. The lifting mechanism has two main and auxiliary winch systems. The main winch system is used for boom lifting and the auxiliary winch system is used for jib lifting.

Solution:

In order to enable the truck crane to work within the safe working load range, there must be a monitoring system to automatically and real-time monitor the lifting load of the crane, the telescopic length of the boom and the working angle of the boom, and give an alarm when the crane is in dangerous working conditions, and at the same time, output control signals to limit the crane to continue to move in the dangerous direction.

The WTL torque limiter produced by Weite Electronic Equipment Co., Ltd. can fully meet the torque limit of crawler crane for safe use.
1. Display function
The torque limiter can comprehensively display various parameters in the working process in the form of Chinese characters, graphics and characters.
Such as the lifting weight of the main hook, the lifting weight of the auxiliary hook, the working angle of the boom, the length of the boom, the working radius, etc;

2. Alarm function
It has sound and light alarm function: when the working range of the crane boom is close to the working limit, and when the lifting load and torque are close to the current allowable load limit of the equipment, the torque system will send out a slow warning buzzer. The warning indicator of the torque system flashes slowly.
When the working range of the crane boom reaches the working limit, and when the lifting load and torque reach the current allowable load limit of the equipment, the torque system will send out a rapid alarm buzzer. The alarm indicator red light of the torque system flashes rapidly.

3. Torque protection function
Control output function: when the working range of the boom is close to the working limit, when the lifting load and torque are close to the current allowable load limit of the equipment, the torque system outputs control signals to prevent the crane from continuing to run in the dangerous direction and allow the crane to move in the safe direction.

matters needing attention:
The crawler crane drive motor is mostly hydraulic, so the solenoid valve for controlling the oil circuit is an essential equipment component.
Before installing the torque limiter, check the oil circuit solenoid valve of the crane to make it work normally.