Unitywater revolutionises pipe rehab using ROV Robots

These innovative new technologies have been adopted in a bid to save money and improve operations. Simon Taylor, Executive Manager of Infrastructure Planning & Capital Delivery said “The advantages of both of these innovations is that they allow us to monitor our assets from inside the pipe or reservoir, rather than attempting to draw conclusions from indirect, external clues. Plus the data collection is in real time and on the spot.” Key to the rehabilitation work is the submersible remote operated vehicle (ROV) robot, which Unitywater has dubbed “Rove”. Rove is a SmartBall™ leak detection and assessment device, which is disinfected, placed into a sewer or water main and allowed to “free swim” for up to 12 hours. The device consists of a small aluminium alloy ball containing an acoustic sensor and GPS tracker that can accurately detect sound leaks and gas pockets. This is encased in a foam outer shell to protect the device as it travels through the main. When submerged the SmartBall is able to perform an accurate condition assessment of reservoir interiors, taking note of any structural or safety issues. By using the SmartBall there is no longer a need for human divers to perform confined space entry and observation, meaning that water supplies and reservoirs do not have to be taken offline during leak detection. This improves safety and minimises inconvenience for utility users. Thus far Unitywater has used the SmartBall leak detection technology to inspect 8.9 km of pipeline in the Lander Shute-Woonbye region. This trial run took just over three hours and revealed at least three leaks – leaks that would have costed Unitywater approximately $A31,000 per annum if they remained undetected. “Leaks can be precursors to pipeline failure and the integrity of our reservoirs is critical. If we can discover leaks or reservoir defects early, we can take the immediate necessary action to repair them before they become a major problem. This helps us better target our maintenance priorities, minimise impacts to customers and reduce the strain on our maintenance crews and repair budgets,” Mr Taylor said. Unitywater plans to use the SmartBall to inspect a further 15 reservoirs and towers throughout 2015-16, prioritising assets in Narangba, Margate, Peregian Beach, Bli Bli and Mooloolah Valley. For further information visit the Unitywater website.