Due to quality problems with specific blades in row 3, unplanned inspections of these components had to be performed. For significantly saving cost, a new tool was developed- to perform this task without removing the rotor
- Access Blade-row 3 from the exhaust area, by passing through Blade-row 4 and Vane-row 3
- Perform EC-scans to search for cracks on these bladesè Avoid removing the rotor (time-consuming, expensive, and risky)
-> Avoid removing the rotor (time-consuming, expensive, and risky)
GT26-BLADE3 was financed by ALSTOM-Power. The time between project start and first commercial inspection was only one year. Until now, more than 30 inspections have been performed.
- Segmented arm for scanner-deployment, operated with Bowden-wires
- Miniature x/y-scanner with remotely retractable probe-arm
- Camera-system to assist the deployment and monitor the scan
- Deployment: Simple and user-friendly deployment-system for a scanner – in an area that is very difficult to access
- Scanner: Very compact (25 x 80 x 200) and reliable XY-scanner for Eddy-current-inspections in narrow areas
- NDT: Reliable crack-detection on blades, with eddy-current
- Camera: Compact camera-system for operation between blades
ALSTOM Inspection Robotics and other partners in the ALSTOM R&D network
This project was done in collaboration with ALSTOM R&D (camera-system),
Sensima (NDT) and EPFL (scanner prototype). Alstom Inspection Robotics
was responsible for the technical project lead, the deployment arm and the
industrialization of the scanner and its probe holder.
Depending on the code, country and asset owner storage tank walls have to be inspected at a certain interval. Usually a visual inspection is the first type of inspection to be performed. Depending on ithe results further NDT methods have to be applied fully assess the condition of the tank.
In power plants the FAST RVI is used to inspect the condition of filter houses, stacks and silencers.
VISUAL INSPECTION IN GENERAL
The FAST RVI can be used for all visual inspections on ferromagnetic steel structures.
- oil rigs
- ship hulls
- steel factories
- steel bridges
FAST WELD FOLLOWING
This innovative technology is using an industrial camera to recognize a weld seam. Image processing algorithms constantly extract the weld features from the image stream and determine its center position. The information is sent to the on-board motor controllers which maneuver the robot precisely along the weld.
|Dimensions||Length 250 mm (9.9") x Width 490 mm (19.3") x Height 160 mm (6.3")"|
|Weight (without cables)||9.3 kg (20.5lb) without camera|
|Payload||15 kg (33lb)|
|Speed||fully adjustable, max. 60 mm/s (2.4"/s)"|
|Drive units||2 integrated drives with 48V brushless DC motors|
|Power Supply||48V via umbilical cable from external supply station|
|Motor controller||inspection robotics motor controller|
|Min outer pipe diameter||600 mm (23.6")"|
|Max inner pipe diameter||1200 mm (57.2")"|
|FAST vessel, min inner diameter||1800mm (70.9")"|
|Control||Built-in touchscreen and industrial Joystick|
|Power Supply||100-240 V AC 50/60Hz or 48V DC, max 200W|
|Dimensions||Length 340 mm (13.4") x Width 350 mm (13.8") x Height 130 mm (5.1")"|
|Weight||14kg (31lb) without cabeling|
|CONTENT BASIC SET|
|FAST RVI robot in a rugged transport box|
|Supply Station - built in a rugged hard shell box|
|40m cable from supply station to robot|
|Deployment tool for vessel inspection|
|Top view navigation camera, manway camera|
WHAT OUR PARTNERS SAY