MEASUREMENT TOOLS FOR HYDRAULIC GATE DIAGNOSIS

MEASUREMENT TOOLS FOR
HYDRAULIC GATE DIAGNOSIS
By measuring geometry above and underwater, the Tracker Toolkit and the WireScan
laser scanning system provide complete diagnostic data for hydraulic gates.
Roller path
Measure embedded parts:
Lintel
>> when motor current is abnormally high during a hoisting test
>> when seal leakage arises
Sealing
Avoid major costs by performing the right repairs at the right time.
Sill
Safer operations
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.
Embedded steel parts
Two new tools are now available to measure embedded parts.
WireScan
Laser scanning of embedded parts
1
CIGB-ICOLD (1995) - Dam Failures - Statistical Analysis, bulletin 99.
Tracker Toolkit
Points survey in the dry
Characteristics
Ideal for:
Points survey in the dry: Spillway gate
• Spillway gates embedded parts
• Hoisting systems
• Hydraulic Gates
Measurement by probing with a laser tracker:
• Deployment in about 1 hour (2 operators)
• Inspections in 1 or 2 days per opening
• Automatic charts
• Georeferenced data
• Precision of ± 0,1 mm
Access to vertical guides by rope access, ladder, bucket or scaffolding
Results available on site for immediate checking of measurements
Compact, hand-transportable in confined spaces
Possibility to deploy under a gate in upper position
WireScan
Underwater laser scanning
Avoid coffer dams and production losses.
Characteristics
Ideal for:
Underwater laser scanning: Stoplogs guides
• Stoplogs guides
• Water intakes embedded parts
• Draft tube embedded parts
• In calm water or in the dry
3D reconstruction using laser measurements:
• 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
Results available on site for immediate checking of measurements
Compact, hand-transportable in confined spaces
Possibility to deploy under a gate in upper position
Measurements obtained safely without divers
Cost savings
Apply a minor fix instead of going through a complete rehabilitation process.
Laser scanning survey: Roller marks on roller path
Monitoring of assets:
For information:
Research
Guillaume Boivin, Eng.
Telephone: 450 652-8699
E-mail: [email protected]
Business partner
EXACTAM, Richard Duchesne
Telephone: 438 396-4014
E-mail: [email protected]
www.exactam.com
April 2015
2015G120-A
>> 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).
$