We use robotic crawler video inspection technology to perform video inspections of large municipal and commercial sewer mains and service lines. By making use of two different sized video crawlers and a sonde, we are able to inspect pipes to look for areas of concern, mark out problem areas in the field with paint and/or flags, and document the findings on a video recording and in a written report.
The P350 flexitrax, which is manufactured by SPX Corp. of Raymond, ME, is comprised of a computer; a compact self-contained powered drum with up to 1000 feet of cable; and two different sized robotic crawlers with a video camera, sonde, and light at their heads. This system is used to inspect pipes that are too large and deep to be inspected by the Push Rod Video Inspection System.
The P350 flexitrax system makes use of two different sized robotic crawlers and video cameras, which together enable us to inspect pipes and empty conduits of 4 inches or more in diameter up to a distance of 1,000 feet.
P354 Robotic Crawler
P356 Robotic Crawler
The robotic crawler is deployed into the line through a vault or a catch basin by dropping it in from an extension pole.
The P350 pendant controller is used to propel the robotic crawler through the line in question, and it enables us to pan and tilt the camera around to look around for and zoom in on any problem areas.
The video recording begins at a distance 0 feet, the start of the pipe run, and the robotic crawler is propelled along the entire section of pipe in question or until it meets resistance or loses traction. While moving the crawler forward, the computer screen is watched for any areas of concern. Comments are typed onto the screen to document any problem areas and record their distance from the starting point, 0 feet, along with taking still images of them for incorporation into a report (if one is requested).
Attached to the robotic crawler is a sonde, which can be located at the surface with a cable and pipe locator receiver. The sonde is turned on and pushed to the location of the problem area. At the surface, the sonde's location and depth is detected with a handheld receiver and documented in the field by marking the ground with paint and/or flags, showing exactly where excavation needs to be performed to expose the pipe for repair.
After the video inspection survey has been completed, the video files can be written onto a CD or flash drive and delivered to the client right in the field. Or when back at the office, they can be uploaded to a Google Drive public folder, where the client can download them from a link sent via email. In addition, if requested, still images of any problem areas can be incorporated into a written report documenting and discussing the results of the survey and, if necessary, making recommendations on how to repair them.