Operational Instructions for Hydraulic Elevator Dam (HED)

1. Pre-Operation Inspection

• Structural Components

• Inspect the water-retaining panel (gate leaf) for cracks, warping, or loose fasteners; tighten or replace components as needed.

• Clear guide rails of debris, sediment, or obstructions; check for rust, dents, or uneven surfaces that may impede movement.

• Examine sealing gaskets around the panel for wear, tearing, or hardening; replace if leaks are detected during visual checks.

• Hydraulic System

• Verify hydraulic oil level in the reservoir (must remain between "MIN" and "MAX" indicators).

• Check oil condition: no emulsification (cloudiness), discoloration (darkening), or visible particulates; drain and replace oil if contaminated (per manufacturer specifications).

• Inspect hoses, pipes, and fittings for leaks, bulges, or corrosion; tighten loose connections and replace damaged parts immediately.

• Ensure hydraulic cylinder rods are clean, free of scratches, and lightly lubricated (use recommended hydraulic grease).

• Control System

• Power on the PLC control cabinet; confirm no error codes or alarm indicators (resolve all faults via the troubleshooting guide before proceeding).

• Calibrate sensors: water level sensors (accuracy ±10mm), hydraulic pressure sensors (stable readings at idle), and position encoders (panel position matches display within ≤5mm).

• Test manual override buttons (up/down/stop) on the control panel to ensure responsiveness.

2. Startup Procedure

1. Power Activation

• Turn on the main power switch (located in the control cabinet); verify indicator lights for the hydraulic pump, PLC, and sensors illuminate.

• Allow the system to self-check (typically 2–3 minutes); wait for the "READY" signal on the control screen.

2. Mode Selection

• Automatic Mode: System adjusts panel height based on preprogrammed water level thresholds (set via PLC parameters).

• Manual Mode: Operated directly by the user via up/down buttons (for maintenance or emergency adjustments).

• Choose operation mode via the control panel:

3. Pre-Startup Confirmation

• In manual mode: Confirm the panel’s initial position (displayed on the screen) matches the physical position.

• In automatic mode: Verify preset water level targets (e.g., "High" = 5.0m, "Low" = 3.0m) are correctly configured.

3. Operation Control

3.1 Lifting/Lowering the Panel (Manual Mode)

• To raise the panel: Press and hold the "UP" button; monitor the position display and stop when the target height is reached (e.g., 4.5m).

• To lower the panel: Press and hold the "DOWN" button; ensure the panel moves smoothly along guide rails (no jamming or unusual noise).

• Speed Regulation: Adjust lifting/lowering speed via the control knob (range: 0.1–0.5m/min, per design limits).

3.2 Automatic Operation

• The system automatically activates when the upstream water level exceeds (raises panel) or falls below (lowers panel) preset thresholds.

• Monitor real-time data on the control screen: water level, hydraulic pressure (normal range: 10–15MPa), and panel position.

• Intervene manually via the "OVERRIDE" button if automatic adjustments deviate from expected behavior (e.g., slow response to rising water).

4. Shutdown Procedure

4.1 Normal Shutdown

1. Lower the panel to the fully closed position (if applicable) or a safe intermediate position (e.g., 0.5m above the foundation).

2. Press the "STOP" button on the control panel; confirm the hydraulic pump stops and the panel is stationary.

3. Turn off the main power switch; record operation duration, water level ranges, and any anomalies in the logbook.

4.2 Temporary Shutdown (Short Breaks)

• Keep the main power on but press "STOP" to halt panel movement; the system remains in standby for quick reactivation.

5. Emergency Handling

• Emergency Stop: Press the red "EMERGENCY STOP" button (located on the control panel and near the dam) to immediately cut power to the hydraulic system. Use this for jamming, leaks, or safety threats. After stopping, inspect the cause before resetting.

• Hydraulic Leak: Stop operation, isolate the leak (close relevant valves), and contact maintenance to replace damaged hoses/pipes. Do not operate with low oil levels.

• Sensor Failure: Switch to manual mode, verify panel position visually, and recalibrate or replace faulty sensors before resuming automatic operation.

• Overpressure Alarm: The system will auto-stop if pressure exceeds 1.2x the working limit. Check for blocked pipes or cylinder jamming; resolve before restarting.

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6. Daily Maintenance

• Hydraulic System: Check oil level and condition daily; replace oil every 6 months (or 500 operating hours).

• Structural Parts: Lubricate guide rails weekly (use anti-rust lubricant); inspect seals monthly for wear.

• Electrical Components: Dust control cabinet and sensors monthly; test emergency stop functionality weekly.

• Logkeeping: Record all inspections, operations, and faults in the maintenance log for traceability.

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