Piping

The utility model relates to a water delivery, wet goods fluidic piping field disclose a piping, this piping include cement pipe (1) and suit in cement pipe (1) outer tubular metal resonator (2), cement pipe (1) with radial clearance has between tubular metal resonator (2), cement pipe (1) with the both ends of tubular metal resonator (2) are connected with at vacuole formation between the two, be formed with slip casting layer (3) in the cavity. Cement pipe (1) receives the extrusion of slip casting layer (3) and tubular metal resonator (2) forms circumferential pre -pressure. The utility model discloses a piping can bear high interior the pressure and high external pressure, has good anti -permeability and durability, and the cost is lower moreover. 本实用新型涉及用于输水、油等流体的管道领域，公开了种管道，该管道包括混凝土管(1)和套装于所述混凝土管(1)外的金属管(2)，所述混凝土管(1)与所述金属管(2)之间具有径向间隙，所述混凝土管(1)与所述金属管(2)的两端连接以在两者之间形成空腔，所述空腔内形成有注浆层(3)。所述混凝土管(1)受所述注浆层(3)和金属管(2)的挤压形成环向的预压应力。本实用新型的管道能够承受高内压和高外压，具有良好的抗渗性和耐久性，而且造价较低。