A safety monitoring method and system for a tower crane jacking system

Abstract

The invention belongs to the technical field of tower crane control information processing, and discloses a method and system for monitoring the safety of a tower crane jacking system, analysis and numerical simulation of the inclination state of the jacking system under wind load, and the numerical value of the jacking frame under multiple loads. Simulation modeling and analysis, dynamic detection and adjustment of contact balance of jacking frame, reliability evaluation and fault diagnosis method of hydraulic jacking system of tower crane. The invention analyzes the contact balance state detection technology of the tower crane jacking system under variable load, and can realize real-time monitoring and early warning of the equipment running state. The dynamic characteristic analysis and operation stability enhancement technology of tower crane jacking hydraulic system are analyzed, which can avoid dangerous accidents and increase the service life of tower crane. The reliability assessment and fault diagnosis technology of the tower crane jacking system is analyzed, which can effectively guarantee the operation safety of the tower crane in the installation / disassembly process. The invention solves the problems of the force condition analysis and dynamic monitoring of the sleeve under the operation of the jacking mechanism.

Description

technical field [0001] The invention belongs to the technical field of tower crane control information processing, and in particular relates to a safety monitoring method and system for a tower crane jacking system. Background technique [0002] At present, due to the particularity and structure of its use, the safety hazards of tower cranes exist in many factors such as installation, disassembly, use, management, and natural environment. In tower crane accidents, safety accidents during jacking operations account for a relatively high proportion, and improving the safety performance of the tower crane jacking system can effectively curb the occurrence of tower crane accidents. [0003] The jacking mechanism of tower crane is mainly composed of jacking sleeve, jacking hydraulic cylinder, roller and standard section of tower body. Its main function is to meet the actual needs of construction by increasing the standard section of reducing tower body. In addition to illegal op...

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Problems solved by technology

[0004] (1) During the jacking process of the tower crane, the frame rollers are stuck, the tower is tilted, the upper load is unbalanced, and the wind load is temporarily applied, which causes damage to the frame or tower structure;

[0005] (2) Due to the poor working environment and heavy load, the hydraulic system is prone to component aging and seal damage. In addition, these faults are not easy to detect, and accidents are caused by failure to deal with them in time before jacking up or improper handling during jacking up

Due to the lack of effective dynamic monitoring and detection means, the labor intensity of workers is objectively caused, and there are a series of hidden safety hazards

2) Tower cranes are sensitive to wind loads during jacking operations, and jacking operations are not allowed under strong wind conditions above level 4. At present, domestic analysis and understanding of wind loads in the jacking process is relatively lagging behind. The foundation is still immature, and there is no effective method for the dynamic detection and adjustment method of the contact balance of the jacking sleeve under complex working conditions

The above problems make it difficult for engineering and technical personnel and special equipment inspection and testing agencies to make a reasonable assessment of the safety performance of tower cranes when they encounter emergencies and lack corresponding technical guidance.

[0010] Through the above analysis, the existing problems and defects of the prior art are as follows: 1) Most of the installation / disassembly of standard joints is carried out by manual operation, manual on-site inspection, and coordination by the general command

Due to the lack of effective dynamic monitoring and detection means, the labor intensity of workers is objectively caused, and there are a series of hidden safety hazards

[0011] 2) Tower cranes are sensitive to wind loads during jacking operations, and jacking operations are not allowed under strong wind conditions above level 4. At present, domestic analysis and understanding of wind loads in the jacking process is relatively lagging behind. The foundation is still immature, and there is no effective method for the dynamic detection and adjustment of the contact balance of the jacking sleeve under complex working conditions

[0012] 3) The hydraulic system is an important part of tower crane jacking. During the working process, due to changes in main parameters such as external loads and internal damping of hydraulic components, the dynamic characteristics of the circuit are easily affected and failures occur.

[0014] 1) At present, there is no comprehensive dynamic monitoring and detection method that considers the above factors in China, and it needs to be developed by itself

[0015] 2) There is a lack of theoretical support for the dynamic detection and adjustment methods of the contact balance of the jacking frame under complex working conditions

[0016] 3) When the hydraulic system is working, it is easy to affect the dynamic characteristics of the circuit and cause failures, and it is necessary to monitor various data of the hydraulic system at the same time

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