Exploration of inspection technology for elevator hoisting machinery

By | July 17, 2020

The purpose of inspection of elevator hoisting machinery is to ensure the safety of daily operation of elevator hoisting machinery. Therefore, relevant staff need to master scientific and effective elevator hoisting machinery related inspection technology to ensure the reliability and safety of elevator hoisting machinery operation.

Our country’s construction engineering industry is developing rapidly, and for residential buildings, shopping malls and other construction projects, especially high-rise or super-high-rise buildings, elevator installation is very important, which is also an important equipment to ensure the access of residents or commercial office personnel. However, in recent years, there have been many safety accidents caused by equipment such as elevators. From a safety point of view, it is necessary to strengthen the daily maintenance and inspection of elevators and lifting equipment. In view of this, the analysis and research around “relevant technology for testing elevator hoisting machinery” has certain value significance.

In order to make the inspection work of elevator and hoisting machinery smooth and orderly, it is necessary to understand the basic principles followed by the inspection work and further prepare for the preliminary inspection work. The summary includes the following points.

1. Principles to be followed when testing elevator hoisting machinery

Based on the analysis of elevator hoisting machinery applied in the current situation, there are more types, different elevator hoisting equipment, there are also differences in design, operating procedures and inspection methods are also different. Therefore, it is necessary to follow the basic principles of rational selection of inspection methods. For the parts where electrical cranes are prone to defects, the application of non-destructive inspection technology can be used to achieve effective inspection. Through the inspection, if cracks, bushing wear and spreader wear do not meet the controllable range, that is, the quality defect limit state is reached, it is necessary to take measures to replace the equipment in time. In addition, it is necessary to strictly implement the inspection standards, strengthen the inspection of the details of the elevator and hoisting machinery, and avoid the occurrence of problems such as missed or false detection.

2. Check the preparatory work of elevator lifting machinery

Lifting machinery is special equipment, and the production process is complicated. Its production cost and production technology are not affordable by ordinary units, not to mention, the country has strict regulations on the control of the production of lifting machinery. In order to ensure the smooth and orderly inspection of elevator hoisting machinery, it is necessary to prepare for the preliminary work of elevator hoisting machinery. On the one hand, complete the search of information files. The manufacturer of elevator hoisting machinery shall provide all the information about elevator hoisting machinery and equipment to the staff of the equipment inspection, so that the inspecting staff can understand the relevant information of the equipment and can inspect the equipment more comprehensively. Relevant inspection staff must maintain a serious and responsible working attitude, and find the corresponding data files for the faults of elevator and hoisting machinery, so that the follow-up maintenance work can be carried out smoothly and effectively. For example: prepare the product qualification certificate, model test report and safety component commissioning manual provided by the corresponding manufacturer of the equipment, prepare the electrical layout drawings and installation drawings provided by the production plant parts, and handle the accidents provided by the manufacturer Documents such as records, reports and self-inspection reports are ready to provide effective data and information support for subsequent maintenance work. On the other hand, strengthen the inspection of the details of elevator lifting equipment. For example, before the inspection of elevator hoisting machinery and equipment, it is very important to clarify the position of the elevator control power supply, and the power box needs to be consistent with the power supply requirements when wiring. During the commissioning and inspection of the equipment, it is necessary to choose to apply a formal power supply and ensure the stability of the power supply voltage; avoid current interference in the vicinity of the power supply box; ensure that the cables are ready to be arranged, and problems such as crossover of the line must be fully avoided. The staff conducting the inspection shall carefully check each part of the elevator hoisting machinery, make sure that the parts of the mechanical equipment are not loose, lubricate the various components, so that they can work normally, there will be no problems during the operation, and prevent the occurrence of elevator accidents . In addition, if safety problems are found during the inspection, they must be recorded in detail in order to provide effective record support for subsequent maintenance work.

3. Visual inspection technology

The visual inspection is also called visual inspection, which is to assist the inspector to understand the safety of the elevator and whether its quality meets the requirements. The visual inspection requires the inspector to inspect the entire structure of the elevator. Because of the overall understanding of the elevator, the inspector cannot carry out random inspections or general inspections of the elevator parts. The inspector needs to carefully examine each part of the elevator Check in order to grasp the overall situation of the elevator. The visual inspection needs to inspect the mechanical parts in the elevator. The size and quality of the metal structure and the quality of the mechanical devices all need to be inspected by the inspectors to make them meet the equipment requirements. Based on the overall analysis of the inspection work of elevator hoisting machinery, for visual inspection technology, it is a more traditional inspection technology method. The application of this technical method is mainly to judge the operation of elevator hoisting machinery. Find out the obvious fault problems, and then judge whether further maintenance work is needed. However, the visual inspection technology also has its own advantages, that is, the adoption of visual inspection technology does not require the help of other related inspection system equipment, and will not be restricted by time and place. It can achieve inspection anytime and anywhere, and can quickly find some major The failure can avoid the further development of the failure. However, for visual inspection methods, usually only the surface of elevator hoisting machinery equipment can be inspected, while for the internal conditions of elevator hoisting machinery equipment, it is difficult to perform effective inspection. Therefore, it is recommended that during the inspection of elevator hoisting machinery and equipment, first of all, through the application of visual inspection technology methods, further cooperate with other inspection technologies to ensure the effectiveness and scientificity of inspection. In other words, the visual detection technology can be used as an auxiliary detection technology. For example, use visual inspection technology to observe the shape of elevator lifting equipment, observe whether the parts of the key parts of the equipment are deformed by the influence of external forces, observe whether the parts have deep friction problems, and observe the safety Whether the device is in normal operation, etc. Through visual inspection at these levels, combined with the above-mentioned ray detection technology and penetration detection technology, the problem of potential safety hazards will be further clarified and resolved in time to ensure the elevator Hoisting machinery operates normally and safely.

In summary, in order to ensure the reliability and safety of the operation of elevator lifting equipment, it is very important to strengthen the inspection of elevator lifting equipment. Therefore, it is necessary to master some scientific and effective elevator lifting machinery inspection technology. Before the inspection work is carried out, understand the basic principles to be followed for the inspection of elevator hoisting machinery and equipment, and make further preparations for the inspection of elevator hoisting equipment, and then, in the process of actual inspection work, reasonably apply radiographic testing techniques , Penetration testing technology, visual testing technology and metal magnetic memory testing methods, etc. It is believed that in the inspection work of elevator hoisting machinery and equipment, if these detection techniques are used reasonably and scientifically, the quality and effect of the inspection work will be effectively improved, thereby providing the necessary technical support for the further maintenance work of elevator hoisting machinery and equipment.