Multi-purpose robot for rehabilitation of small diameter water pipes

TL;DR

This paper presents a modular robot designed for rehabilitating small-diameter water pipes, capable of detecting, locating, and reestablishing branch connections after lining, with a prototype validated in laboratory conditions.

Contribution

The paper introduces a novel modular robot system for small water pipe rehabilitation, including perception and machining capabilities, with a validated prototype for the first time.

Findings

Robot successfully detects and characterizes branch connections.

Prototype operates within 8-meter pipe sections in laboratory.

System demonstrates potential for in-situ pipe rehabilitation.

Abstract

Rehabilitating cast iron pipes through lining offers several advantages, including increased durability, reduced water leaks, and minimal disruption.This approach presents a cost effective and environmentally friendly solution by sealing cracks and joints, extending the pipeline's lifespan, and reducing water wastage, all while avoiding the need for trench excavation. However, due to the relining process, branch connections are sealed and need to be reestablished. To address the issue of rehabilitating small-diameter water pipes, we have designed a modular robot capable of traversing and working within 200 meter long, 100 mm diameter cast iron pipes. This robot is equipped with perception functions to detect, locate, and characterize the branch connections in cast iron pipes and relocate them after lining, as well as machining functions. A first prototype of this system has been developed and validated on an 8 meter long section, in a laboratory environment.