The composite hose can be used in high frequency and low amplitude vibration, but it is not suitable for low frequency and high amplitude vibration, such as piston compressor, diesel engine, etc., because this vibration will increase the maximum expansion joint. stress. In the case of satisfying the internal pressure, the wall thickness of the composite hose should be small to reduce the natural frequency, increase the flexibility, and reduce the load.
When installing the expansion joint on the pipe vibrating the machine, the end of the expansion joint should be as close as possible to the machine, and the pipe connected to the other end of the expansion joint should be fixed as close as possible to the expansion joint. Because the fixed point is too far away from the expansion joint, the tube between the expansion joint and the fixed point becomes a cantilever beam, which not only can not absorb vibration, but also increases the vibration and shortens its life.
The composite hose is the component that connects the pipe and it is also an important compensating component of the pipe. When the equipment is in operation, the equipment pipeline will be displaced due to external factors, mechanical deformation, vibration, etc., because the pipeline itself has no flexibility, and once the mechanical deformation or displacement occurs, the pipeline will be damaged. However, the composite hose can compensate for such displacement, mechanical deformation, vibration and other pressures for the equipment pipeline, thus effectively ensuring the healthy operation of the mechanical pipeline.
(1) When the composite hose is used to compensate for the positional deviation caused by the installation in the piping system, it is only necessary to have a life expectancy of only a few times.
(2) The composite hose is used in the thermostat controller with high switching rate, and its service life must reach 10,000 times to meet the requirements of use.
(3) When the composite hose is used as a vacuum seal as a vacuum seal, its life should reach 30,000 times to ensure normal operation. The length of life of a composite hose during operation depends mainly on the maximum stress generated during operation. In order to reduce the stress, it is generally achieved by reducing the working displacement of the composite hose and reducing the working pressure. In the general design, the working displacement of the composite hose is to be less than half of its allowable displacement, and its working pressure should be less than half of the pressure resistance of the composite hose. Tests on the currently produced composite hoses prove that if the composite hose is operated according to the above specifications, its service life can reach 50,000 times.
Application of composite hose in natural gas pipeline connection
Natural gas composite hoses are mainly made of soft PVC material, which forms a very good protective sleeve. Then the natural gas composite hose has a very large effect on its ageing and UV resistance. Nowadays, the natural gas composite hose meets the basic needs of customers under normal circumstances, and its installation method is also very much. Because the corrosion resistance of natural gas composite hoses is now very strong. So in general, its service life is more than 50 years under normal circumstances. Therefore, the natural gas composite hose pipe is generally not affected by any factors. Therefore, the installation of the natural gas composite hose is very convenient and is very popular among the people.
Oil is the blood of China's economic development and a strong backing and a powerful pillar for China's economic development. Faced with the increasingly fierce international technology competition and the limitations of China's oil exploration technology, China's oil production is far from being able to meet the current economy. Development needs. At present, nearly half of China's oil production comes from foreign imports. There are many ways to transport oil, railway transportation, road transportation and pipeline transportation. Relatively speaking, pipeline transportation is not subject to seasonal and environmental restrictions. The environment along the pipeline causes pollution and is widely used by all major oil importing countries. However, due to the large investment in oil hoses and more investment operators, oil hose operators have been pursuing profit maximization, which has many problems in the management of oil hose transportation, such as unregulated management, oil hose transportation. Problems such as the existence of safety risks have become increasingly prominent, which seriously affects the safety of China's oil hose transportation.