Safety monitoring method and system for tower crane jacking system

Abstract

The invention belongs to the technical field of tower crane control information processing and discloses a safety monitoring method and system for a tower crane jacking system. Inclination state analysis and numerical simulation of the jacking system under a wind load, jacking sleeve frame numerical simulation modeling and analysis under multiple loads, jacking sleeve frame contact equilibrium dynamic detection and regulation thereof, and reliability assessment and a fault diagnosis method of the tower crane hydraulic jacking system are included. According to the safety monitoring method and system, sleeve frame contact equilibrium state detection technology of the tower crane jacking system under variable loads is analyzed, and real-time monitoring and early warning of an equipment operation state can be achieved. Dynamic characteristics analysis and operation stability enhancement technology of the tower crane jacking hydraulic system is analyzed, dangerous accidents can be avoided,and the service life of a tower crane can be prolonged. Reliability assessment and fault diagnosis technology of the tower crane jacking system is analyzed, and operation safety of the tower crane inan installation / disassembly link can be ensured effectively. Through the safety monitoring method and system, the stress condition analysis and dynamic monitoring problems of the sleeve frame under the operation condition of a jacking mechanism are solved.

Description

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

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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 temporarily applied 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 it is not allowed to carry out jacking operations 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 institutions to make a reasonable evaluation 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: 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 it is not allowed to carry out jacking operations 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) As an important part of tower crane jacking, the hydraulic system is likely to affect the dynamic characteristics of the circuit and cause failures due to changes in main parameters such as external loads and internal damping of hydraulic components during its work

[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 sleeve 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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