In engineering, crane rails are installed in an engineering field between mechanical and civil engineering. The track installation is often installed by the plant construction party, while the crane is installed by a unit with crane installation qualifications. The installation of track beams in engineering construction and the installation of agricultural machinery tracks are often completed by two majors(such as civil engineering and mechanical installation), and there is also a disconnect between the two majors. Therefore, it is difficult to ensure the quality of crane rail installation. The quality of crane track installation directly affects the running quality of the crane. Only by grasping the quality control from the source can the quality of crane track installation be guaranteed.
Analysis of the reason for the fracture of the port crane rail
There are problems with the rail material
One of the reasons for the fracture of the rails that can be delivered by port cranes is that the construction unit did not follow the relevant standards in the process of material selection or did not conduct in-depth inspections of the quality of the materials when purchasing them. In order to reduce the corresponding cost in the process of selecting rail materials, some port construction enterprises often choose raw materials with low quality, high impurities, or small cracks. The use process is the same as other normal materials, but as the service life of port cranes becomes longer, cracks will gradually spread in the cross-section of the rail, which will not only affect the cross-section stability of the rail but also cause severe rail breakage to occur.
Welding strength is low
Low welding strength is an important factor leading to the fracture of port crane rails. Usually, construction units use thermite welding or small air-pressure welding technology in the welding process of crane rails. It can also effectively improve the body efficiency of welding engineering, so it is widely used in the construction industry. However, with the relevant personnel in the process of rail welding, it is easy to cause the quality of the welding structure to decline due to the influence of the external environment, coupled with the construction personnel for welding work is relatively low, so that the port crane in the process of daily operation often appear rail fracture. Taking aluminothermic welding as an example, the rails welded by this technology cannot withstand low-temperature tension. Once the weld of the entire rail is damaged during construction in cold winter weather, the rail fracture will occur.
Poor line maintenance
Line maintenance is extremely important for the efficiency of the cranes in the entire port. As far as the rail life of the port crane is concerned, when the entire rail surface lacks flatness or problems occur in the ballast part, it will have a very serious impact on the rail quality of the entire port crane, and serious fractures will occur. This is because the relevant personnel did not strictly abide by the relevant standards and procedures in the line maintenance work, or there were operational failures due to insufficient staff quality, which would adversely affect the service life of the port crane rails. Because of this, in order to effectively improve the economic benefits of related enterprises, the construction unit needs to carry out reasonable maintenance on the port cranes on a regular basis, so as to improve the quality of the entire port construction project and avoid the occurrence of broken rails.
Prevention and control measures for rail breakage of port crane
Selection of rail models
In order to avoid the fracture of the rail structure of the port crane, it is necessary to select a model that meets the relevant requirements during the selection of rail materials. Before the construction of the port, the construction unit needs to conduct a strict review of the flatness and stability of the rail material. The relevant personnel needs to compare the quality of the rail manufacturers in advance. During this process, the relevant personnel needs to ensure the integrity of the entire rail. There will be no port situation around, so ensure that there will be no broken rails during the application process. Not only that, in order to ensure that the crane rails can be carried out smoothly during the construction process without affecting their own economic benefits, the construction party needs to select the rails that meet the requirements according to the actual situation on the site, and strictly review the model and structure of the rails to reduce the risk of rail fracture.
Selection of track support pads
In the process of selecting the rail support backing plate, the construction personnel needs to check the thickness of the rubber pad under the track according to the rail, so as to reduce the stress on the position of the entire track weld. In addition, the use of high-scale rubber pads can also improve the tensile performance of the entire rail, while improving the service life of the rail, it can also ensure that subsequent construction will not be affected by this. For the construction unit, in order to effectively improve the tensile strength of the welded part of the rail, it is necessary to increase the elastic modulus of the support plate, which can not only effectively avoid the occurrence of rail fracture, but also protect the entire port crane during daily maintenance. It plays the role of cushioning and shock absorption during operation.
Selection of track fastening device
In the selection process of the track fastening device, due to the relatively large number of options for the entire track, the construction unit needs to make a comprehensive selection according to the actual situation on the site and various conditions during the selection process, so as to ensure that the used track fixing device can meet the needs of current engineering construction. In addition, before construction, the construction unit needs to send professionals to conduct in-depth investigation and analysis on the construction site and adopt more advanced track fixing technology, so as to prevent the track fastening device from being unable to meet the needs of this port construction. Not only that, the construction unit can effectively combine BIM technology with traditional fastening devices, and analyze the operation process and risks of the entire port crane through the three-dimensional simulation and animation demonstration in BIM technology, so as to advance do a good job in prevention and fundamentally improve the construction efficiency and final quality of port construction.
Design of track foundation
The built crane tracks in port engineering are mainly divided into two types: open track and dark track. If the crane track of the entire port crane itself has been broken, the front track of the rear landside can be used as a bright track, and the rear landside can be used as a dark track, which can not only effectively meet the traffic requirements of surrounding vehicles, but also realize the re-measurement of the track to a great extent. The height difference between the bright rail and the dark rail can be adjusted through the drainage ditch between the two rails. Because of this, the construction unit needs to make reasonable planning and adjustments according to the actual situation of the site during the design process of the track foundation, so as to ensure that the economic benefits of the enterprises will not be adversely affected.