| 摘要 |
<p>The invention relates to a device formed by a casing and two expansion pipes. The casing remains fixed in the ground and the extension pipes are soldered to the ends of the piping, which piping can be a gas pipeline, oil pipeline or water pipeline. As well as the casing and the expansion pipes, the inside of the device is also provided with the following three essential components: the sealing assembly, the radial positioning means and the scraper aligning means. The inventiveness of the device rests on these three components and they are essentially what make it innovative. The invention provides a response to a technical problem to be solved associated with the structural protection of piping used in the transportation of hydrocarbons, in the form of a technological solution intended to mitigate breakages in pipes caused by movements of the ground due to geological faults. The main purpose of the device is to alleviate tension in buried piping conducting crude oil or natural gas, said tension being generated by the movement of the ground. This alleviation of tension is achieved by the ability of the device to extend or lengthen, since it is comprised of three pipes that are not in contact with one another. When the ground moves, the joint lengthens owing to the fact that the expansion pipes are not connected to one another. This extension occurs without gas escaping into the atmosphere. This is possible given the internal composition of the device.</p> |
