Advances in the Inspection of Unpiggable Pipelines

Abstract

Abstract:The field of in-pipe robotics covers a vast and varied number of approaches to the inspection of pipelines with robots specialising in pipes ranging anywhere from 10 mm to 1200 mm in diameter. Many of these developed systems focus on overcoming in-pipe obstacles such as T-sections and elbows, as a result important aspects of exploration are treated as sub-systems, namely shape adaptability. One of the most prevalent methods of hybridised locomotion today is wall-pressing; generating traction using the encompassing pipe walls. A review of wall-pressing systems has been performed, covering the different approaches taken since their introduction. The advantages and disadvantages of these systems is discussed as well as their effectiveness in the inspection of networks with highly varying pipe diameters. When compared to unconventional in-pipe robotic techniques, traditional full-bore wall-pressing robots were found to be at a disadvantage.

An In-Pipe Inspection Robot with Permanent Magnets and Omnidirectional Wheels: Design and Implementation

“…These systems typically have good maneuverability and can be controlled easily. Wheeled systems are also extensively combined with other locomotion types [5]. Second, inchwormlike robots [6][7][8][9][10] can perform both horizontal and vertical locomotion, but still have difficulties in traveling along a curved pipe.…”

“…Second, inchwormlike robots [6][7][8][9][10] can perform both horizontal and vertical locomotion, but still have difficulties in traveling along a curved pipe. Third, wall-pressed robots [11][12][13][14][15][16] are the most popular system used for the application of in-pipe inspection robots [5]. These systems require a frictional force between the leg or wheel of the robot and the inner wall of the pipe to travel along the pipe.…”

Simulation of the behavior of biologically-inspired swarm robots for the autonomous inspection of buried pipes

“…Additionally, they are expensive and require complex enabling works. This limitation has lead to a number of alternative inspection platforms being proposed Mills et al (2017). Efforts have been made to introduce PIG-like commercially available devices into water and wastewater pipes, e.g.…”

Driving Mechanisms, Motion, and Mechanics of Screw Drive In-Pipe Robots: A Review

“…Global pipelines have a large number of safety hazards which can be managed by conducting the regular inspection and maintenance of pipelines [5]. In-pipe robots are electromechanical systems carrying instruments and working tools that can perform inspections and repairs in the pipeline [6,7]. At present, in-pipe robots are mainly divided into active and passive types.…”