Preparation device of steel-plastic composite pipe provided with stainless steel bushing

Abstract

The invention discloses a preparation device of a steel-plastic composite pipe provided with a stainless steel bushing. The preparation device comprises an oil supply device and an expansion device, wherein the expansion device comprises an oil pipe joint, an expansion drum core, an oil mold core embedded into the expansion drum core, an expansion sleeve installed on the expansion drum core and positioning devices installed on both ends of the oil mold core, during operation, the oil pipe joint is connected with an output joint of the oil supply device, an oil supply channel which is used for supplying oil to the expansion drum core is formed in the oil mold core, the input end of the oil supply channel is connected with the oil pipe joint, the output end of the oil supply channel is used for supplying oil to the expansion drum core through a mold core oil hole in the oil mold core, and the positioning devices are used for preventing the expansion drum core and the expansion sleeve from axially extending. The preparation device has the advantages of simple structure and low manufacturing cost. All points of the stainless steel bushing are uniformly stressed, and the stainless steel bushing is uniformly and tightly installed at an end opening of the steel-plastic composite pipe without dead points in an expansion manner.

Description

technical field [0001] The invention relates to the field of pipe material manufacturing, in particular to a preparation device for a steel-plastic composite pipe equipped with a stainless steel bushing. Background technique [0002] The existing plastic-lined groove type and external thread connection type steel-plastic composite pipes are easy to crack and rust at the two ends of the pipe, which seriously affects the service life of the pipe. Composite pipe with shedding stainless steel bushing. The stainless steel bushing plays a role of covering and protecting the pipe port, which solves the problem of cracking and rusting and improves the service life of the pipe. When installing stainless steel bushings for steel-plastic composite pipes, the problem of its adhesion to the wall is the key to product quality. If the wall is not well attached, the lining pipe may wrinkle, or there may be a gap between the stainless steel bushing and the steel-plastic composite pipe, whi...

AI Technical Summary

Problems solved by technology

The equipment for mechanical rolling is also more complicated and the cost is higher. These two methods also have a common disadvantage: the force at each point is inconsistent, which makes the stainless steel lined pipe fit unevenly.

However, this patent is aimed at the situation where the oil pipeline is equipped with a stainless steel liner. During the installation process, the high-pressure oil directly contacts the stainless steel liner, which is not suitable for water supply and drainage and other fields; and the device is aimed at adding stainless steel to the entire oil pipeline. In the case of the liner, it is not suitable for the case where only stainless steel bushings need to be added at both ends of the pipe

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