measurement tools for hydraulic gate … tools for hydraulic gate diagnosis safer operations...
TRANSCRIPT
About 20% of dam failures are due to malfunctioning spillways1.
Evaluating hydraulic gate reliability requires geometric measurements:
> deformation of embedded parts • straightness deviations • losses in functional clearance • roller marks • corrosion
> hoist misalignment Presently, only trial-and-error repair of components is possible based on hoisting tests and motor current readings.
Two new tools are now available to measure embedded parts.
By measuring geometry above and underwater, the Tracker Toolkit and the WireScan laser scanning system provide complete diagnostic data for hydraulic gates.
Measure embedded parts:
> when motor current is abnormally high during a hoisting test
> when seal leakage arises
Avoid major costs by performing the right repairs at the right time.
MEASUREMENT TOOLS FOR HYDRAULIC GATE DIAGNOSIS
Safer operations
Embedded steel parts
1 CIGB-ICOLD (1995) - Dam Failures - Statistical Analysis, bulletin 99.
WireScanLaser scanning of embedded parts
Roller path
Lintel
Sill
Sealing
For information: ResearchGuillaume Boivin, Eng.Telephone: 450 652-8699E-mail: [email protected]
Business partnerEXACTAM, Richard DuchesneTelephone: 438 396-4014E-mail: [email protected]
April 20152015G120-A
CharacteristicsIdeal for:
Measurement by probing with a laser tracker:
Access to vertical guides by rope access, ladder, bucket or scaffoldingResults available on site for immediate checking of measurementsCompact, hand-transportable in confined spacesPossibility to deploy under a gate in upper position
• Spillway gates embedded parts• Hoisting systems• Hydraulic Gates• Deployment in about 1 hour (2 operators)• Inspections in 1 or 2 days per opening• Automatic charts• Georeferenced data• Precision of ± 0,1 mm
• Stoplogs guides• Water intakes embedded parts• Draft tube embedded parts• In calm water or in the dry• Deployment in about 2 hours (3 operators)• Inspections in 1 or 2 days per opening• Automatic charts• Georeferenced data• Precision of ±1 mm• Maximum depth: 30 m
CharacteristicsIdeal for:
3D reconstruction using laser measurements:
Results available on site for immediate checking of measurementsCompact, hand-transportable in confined spacesPossibility to deploy under a gate in upper positionMeasurements obtained safely without divers
WireScan
Tracker Toolkit
Underwater laser scanning
Points survey in the dry
Avoid coffer dams and production losses.
Points survey in the dry: Spillway gate
Underwater laser scanning: Stoplogs guides
Laser scanning survey: Roller marks on roller path
Cost savings
Apply a minor fix instead of going through a complete rehabilitation process.
Monitoring of assets:
> Supports condition-based maintenance for long-term operability of facilities.
> Avoids premature wear of mechanical and electrical components.
Refurbishment pre-projects:
> Investments are prioritized based on degradation.
> Major investments may be postponed (e.g., replacing embedded parts).
> Uncertainty is reduced for project cost control (contract amendments and work to be redone).
$