Anti-swinging control system of crane weight and control method of system

Abstract

The invention relates to the technical field of crane control, in particular to an anti-swinging control system of a crane weight and a control method of the system. The system comprises a steel wirerope length measuring unit, a pre-treatment module, an anti-swinging operation module and a frequency converter control unit, wherein the steel wire rope length measuring unit is used for accurately measuring the steel wire rope length in real time; a signal of an encoder is in communication through an optical fiber, a measuring signal is transmitted to a PLC, and communication with the PLC is achieved; the pre-treatment module and the anti-swinging operation module are used for calculating a set frequency parameter of a frequency converter according to the distance from the gravity center ofa steel wire rope length superposition gripper (or a lifting appliance) to a steel wire rope unloading buckle, data are output at right time in segments, large and small trolley speeds are controlled,and the large and small trolley speed decreasing anti-swinging purpose is achieved; and the frequency converter control unit achieves speed increasing or decreasing operation according to an output instruction of the PLC. According to the anti-swinging control system, due to production validation, swinging of a load crane during starting and stopping can be eliminated, stability and reliability are achieved, and the swinging reducing amplitude is larger than 95%.

Description

technical field [0001] The invention relates to the technical field of crane control, in particular to an anti-sway control system and a control method for crane weights. Background technique [0002] At present, with the continuous improvement of the national economic development and the continuous improvement of the demand in related fields, in the field of logistics and handling, due to the poor solution to the anti-swing problem, it seriously affects the production efficiency in the process of material handling. At the same time, for cranes that stop at the limit position In this situation, due to the large swing range, the gripper often collides with the wall. [0003] Especially in the field of environmental protection, with the acceleration of the country's urbanization process and the increase in the amount of urban garbage, the garbage grab crane is the core equipment of the waste incineration power plant. Due to the large swing of the garbage crane when it starts o...

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Problems solved by technology

[0002] At present, with the continuous improvement of the national economic development and the continuous improvement of the demand in related fields, in the field of logistics and handling, due to the poor solution to the anti-swing problem, it seriously affects the production efficiency in the process of material handling. At the same time, for cranes that stop at the limit position In this situation, due to the large swing range, the gripper often collides with the wall

[0003] Especially in the field of environmental protection, with the acceleration of the country's urbanization process and the increase in the amount of urban garbage, the garbage grab crane is the core equipment of the waste incineration power plant. Due to the large swing of the garbage crane when it starts or stops, the operating efficiency is reduced. , Excessive swing range may hit the wall of the garbage pool when grabbing materials, and excessive swing range will spill some garbage to areas other than the hopper when feeding materials. At the same time, the problem of anti-swing will seriously restrict garbage cranes or other The realization of the unmanned on-duty goal of industrial cranes

In order to solve the problem of anti-swing, some enterprises adopt complex mechanical structure to reduce the swing amplitude. Due to the complex structure, the manufacturing cost is increased, and the operation reliability is affected at the same time. In actual operation, failures occur frequently.

Some enterprises use frequency converter-based anti-swing, which has achieved certain results, but the production efficiency has been greatly reduced, and the effect is not good for high-speed cranes.

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