An expandable pressure-resistant pipe

Abstract

The invention relates to the technical field of pipelines, in particular to an expanded pressure-resistant pipe, which includes a hard outer sleeve and a flexible inner pipe; two ends of the inner pipe are respectively provided with a retaining ring, and the The outer surface is divided into a symmetrical left semi-arc surface and a right semi-arc surface along any plane passing through the axis line of the pipe, and the right semi-arc surface is provided with a raised part; the outer sleeve includes a left half-arc surface , the right half sleeve and the sliding sleeve; the right half sleeve is slidably connected to the outer wall of the left half sleeve along the direction around the axis of the pipe. The beneficial effect of the present invention is that the inner tube can adjust the internal pressure through adaptive expansion, and the outer sleeve has high corrosion resistance and hardness, which can prevent the inner tube from corroding and can evenly apply the external pressure to the The surface of the inner pipe prevents the inner pipe from being ruptured due to the inconsistency of internal and external pressure in a local area. The combination of the two can ensure that the pipe has high reliability and service life when used in the underground environment.

Description

technical field [0001] The invention relates to the technical field of pipes, in particular to an expansion pressure-resistant pipe. Background technique [0002] Existing pipes are generally laid on the ground or installed inside buildings, so the pipes often need to withstand pressure from the inside and outside of the pipes during use. [0003] When the temperature of the fluid inside the pipe increases or the ambient temperature increases, the pressure inside the pipe will increase. For flexible pipes, the overall expansion of the pipe can increase the internal space, thereby reducing the internal pressure. However, the corrosion resistance of the flexible pipe is poor, and it is not suitable for being buried in the ground. The pressure of the soil inside the ground is inconsistent. Therefore, if the flexible pipe is directly installed in the ground, it may be caused by the expansion of the pipe and the extrusion of the soil. The internal and external pressures are inco...

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Problems solved by technology

[0003] When the temperature of the fluid inside the pipe or the ambient temperature rises, the pressure inside the pipe will rise. For flexible pipes, the internal space can be increased by the overall expansion of the pipe, thereby reducing the internal pressure. However, the corrosion resistance of flexible pipes is poor, and it is not suitable for burying in the ground. The pressure of the soil inside the ground is inconsistent. The internal and external pressure of the pipe is inconsistent, which will cause the pipe to rupture

[0004] For the hard pipe, its material determines that its deformation cannot be too large, so the internal pressure cannot be relieved by expansion, and the brittleness of the hard pipe increases after long-term use, and there are also cases when the temperature changes greatly. In case of rupture

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