Double-layer expansion pipe
An expansion tube and double-layer technology, which is applied in the direction of expansion compensation devices, hoses, pipes, etc. for pipelines, can solve the problems of reduced surface strength, uneven density, uneven force on the surface of pipes, etc., to avoid rupture and prevent Corrosion, the effect of high corrosion resistance
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[0050] A double-layer expanded pipe, including a hard outer sleeve 1 and an inner pipe 2 formed by multi-layer composite;
[0051] Both ends of the inner tube 2 are respectively provided with a retaining ring 3, the outer sleeve 1 is sleeved outside the inner tube 2, and is located between the two retaining rings 3, the inner tube 2 is from the inside to the The outside includes an inner tube 22, a metal mesh sleeve 23 and a rubber outer tube 24, the inner tube 22 and the rubber outer tube 24 are connected by hot melting, and the metal mesh sleeve 23 is embedded between the inner tube 22 and the rubber outer tube 24 , the metal mesh cover 23 includes a plurality of metal collars 231, and the adjacent metal collars 231 are fixedly connected by wires 232;
[0052] The outer sleeve 1 includes an elastic connector 11, a sliding sleeve 12 and two mutually symmetrical half sleeves 13;
[0053] Both sides of the half sleeve 13 are respectively provided with a flange 131, and the adj...
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