Long-distance continuous lining pipe and short metal pipe composite device and preparation method

Abstract

The invention relates to a long-distance continuous liner pipe and short metal pipe composite device, which comprises a plurality of short metal pipes in the outer layer and a liner pipe in the inner layer, and the plurality of short metal pipes are connected end to end; it also includes a coupling. There are female threads inside the coupling mentioned above, male threads at both ends of the short metal pipes, the ends of two adjacent short metal pipes are screwed into the coupling and engaged with the female threads of the coupling through the male threads, and the two The ends of short metal pipes are tightly butted. The invention also provides a preparation method of the long-distance continuous lining pipe and short metal pipe composite device. The invention can overcome the problems of difficult alignment and deviation caused by welded pipes, resulting in stuck or scratched lining pipes, and can realize tight butt joints between short metal pipes; at the same time, because no welding technology is used, the The temperature of the pipeline is low, and the traction operation can be carried out section by section, which overcomes the disadvantages of long-distance traction, saves trouble and labor, and greatly improves the operating efficiency.

Description

technical field [0001] The invention belongs to the field of pipeline equipment, and relates to a long-distance continuous lining pipe and short metal pipe composite device and a preparation method. Background technique [0002] Metal pipes lined with plastic, rubber and other lining pipes have become more common pipes in municipal, petroleum, chemical and other industries. At present, the construction method of this kind of pipeline is mainly to weld short metal pipes one by one to connect long-distance pipes, and then use traction The method is to pull the lined pipe from one end to the other end, and then combine the lined pipe with the metal pipe through various treatment processes to complete the pipeline construction. This construction method has the following disadvantages: one is that the construction time required for welding connection is long, and at the same time, the welding joint must be aligned during welding. If there is a little deviation, it is easy to get ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a long-distance continuous lining pipe and short metal pipe composite device to solve the problems that the current metal pipes lined with plastic, rubber and other lining pipes are easy to cause deviation, and require long-distance traction and inconvenient construction.

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