Milling (150 – 600mm)

To overcome the serious problem of abandoned CCTV surveys, remediation activities and/or respond to an emergency – Interflow has acquired robotic milling machines to continue on from where the obstructions encountered.

Occasionally, conventional CCTV robots used to carry out condition assessments are unable to advance through a pipeline resulting in an incomplete or abandoned survey. In some of these circumstances an obstruction is preventing the CCTV robot from proceeding and extra treatment works are required.

To overcome such physical barriers, Interflow’s new hydraulic milling machine may be considered a possible option. The milling unit can reduce the occurrence of abandoned pipeline assessments by grinding away hard materials such as concrete, allowing the CCTV survey to continue.

The hydraulic milling machine is not limited to overcoming obstacles encountered during pipeline assessments but can also assist in the subsequent pipe remediation activities. During a pipeline assessment an intrusion may be discovered which is not necessarily blocking the entire pipeline cross section, however it could be limiting the flow capacity of the line. In such instances, the hydraulic milling robot is capable of removing the object and allows the pipe to achieve its full capacity.

Most water asset owners have dedicated teams for the ongoing maintenance of their pipe network. However, not all of these organisations have the available resources to remove difficult materials and typically engage contractors to undertake such work. Interflow is now able to offer its hydraulic milling machine as a possible solution in these circumstances.

Another important application for Interflow’s new hydraulic milling unit is in the event where an emergency response is required. Often water asset owners encounter the situation where concrete has been inadvertently discharged into a critical section of their pipe network due to nearby construction activities. The pipeline may be completely blocked and any period out of service is unacceptable. The hydraulic milling robot is able to remove the concrete and bring the network back on line much faster than conventional methods.

These hydraulic robots are self-propelled units and are intended for work inside sewer and stormwater pipes of diameters between 150 and 600mm. The hydraulic units are able to undertake work in larger diameter pipes with the aid of additional accessories.

The hydraulic milling machines are remote-controlled by means of the 140 metre long combination cable with integrated hydraulic lines. This cable supplies the hydraulic milling robots with electrical and hydraulic energy, and transmits the video signal of the camera at the work unit to the monitor in the operator‘s workstation. The axial movement is performed by the drive unit.

To allow a clear picture of pipe conditions during the operation of the hydraulic robots, a swivel head colour camera is included with the unit. The camera is mounted in front of the milling motor and can swivel entirely so that the movements are visible forward and the grinding performance of the motor can be observed backwards. A wiper in front of the camera lens guarantees an optimal camera picture.

For debris that is too difficult to remove through the standard milling operation of the hydraulic robots, a pneumatic chisel is also available. This chisel has the ability to penetrate concrete or other hard materials encountered within the pipe diameter. This chiselling function may increase the probability of a obtaining a complete CCTV survey.