Metal hose is an important component in the connecting pipeline of modern industrial equipment. Metal hoses are used as wire and cable protection tubes for wires, cables, automatic instrument signals, and civilian shower hoses, with specifications ranging from 3mm to 150mm. Small-caliber metal hoses (inner diameter 3mm-25mm) are mainly used for the protection of sensing lines of precision optical scales and industrial sensor lines.
Pipeline installation stress
In complex piping systems, there are often various difficulties in installation due to the limitations of the space and location conditions: the formed pipe cannot be installed; bending, straight, and improvising the installed pipe will inevitably produce partial Cold correction. Depending on the pipe diameter and the specific situation of the site, the amount of cold correction ranges from a few millimeters to tens of millimeters, and some up to hundreds of millimeters. Practice has proved that the greater the amount, the higher the internal stress, and these remaining installation stresses in the pipeline system are undoubtedly extremely hidden.
A section of the bearing lubricating oil duct in a certain type of engine has broken accidents many times in actual operation because of excessive installation stress.
Because it can be bent at will and the internal stress generated by bending under the condition of the rated bending radius is very small, it can bring great convenience to the installation work and also play a certain role in guaranteeing the safe operation of the pipeline system. This is the main reason why metal hoses must be used in certain piping systems.
Due to the needs of loading and unloading molds, the movable cylinder on the vulcanizing machine will move upward and downward. After the copper serpentine tube reciprocates for many times, fatigue fracture will occur. Although it can be used after repairing, it will cause time loss if it is stopped and repaired. Although rubber hose has good soft properties and strong anti-fatigue ability, it is also a weak link in terms of pressure resistance, temperature resistance, and anti-aging. Generally, it cannot continue after a few months of use. The good comprehensive performance of the metal hose is fully embodied here. In general industrial fields, in addition to pressure and temperature, there are often harsh conditions such as fatigue, corrosion, vibration, compression, and impact. Under such circumstances, it is most appropriate to compensate for the positional movement of the pipeline. Of it.
