QY-PIPE

Self-Propelled Non-Tight-Fit (MSW-MT)

Within the host pipe designated for rehabilitation, a self-propelled winding machine is constructed and deployed. The PVC profile strips, which are prefabricated at the factory and transported to the construction site, are fed into the working shaft and then conveyed to the machine. Through the operation of this self-propelled unit, the profiles are spirally wound into a brand-new internal pipeline. A specific annular gap is intentionally maintained between the new liner and the host pipe; by injecting grout into this space, a high-strength composite structural system is formed in combination with the original pipeline. The self-propelled machine can be customized to match the shape of the pipe. Application: DN1200–DN5000 for circular, egg-shaped, rectangular, and irregular-shaped pipes.

Product Details

Technical Benefits and Features:

— It is capable of rehabilitating large-diameter pipes; this technology is suitable for various cross-sectional profiles, including circular, egg-shaped, rectangular, and irregularly shaped pipelines, with a diameter range of DN1200 to DN5000.

— Live-Flow Operation: Suitable for installations with water levels up to 70cm and flow velocities up to 1m/s.

— Operational Flexibility: Construction can be interrupted and resumed at any time. The PVC profiles can be cut or reconnected at any time, allowing for highly flexible construction scheduling and phased/interleaved operations. This minimizes the impact on public traffic to the greatest extent possible (providing an effective response to emergency repairs, rainfall, or the temporary restoration of traffic flow following road control measures).

— Stable Quality: Prefabricated profiles from the factory combined with onsite mechanical winding ensure consistent quality.

— Seismic Resistance: The mechanically wound pipe possesses an inherent seismic resilience.

— Cost-Effective: Superior to open-cut methods, saving on both investment costs and project duration.