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Regular Maintenance Guidelines for Small Flood-Control Water Pumps (e.g., QX-6S)
Regular maintenance of small flood-control water pumps (e.g., QX-6S) can significantly extend equipment service life and ensure stable performance during emergency drainage operations. Below are scenario-specific maintenance key points:
I. Post-Usage Maintenance (After Each Operation)
Clean the Pump Body
Timely remove sludge, weeds, oil stains and other debris from the pump surface to prevent residual impurities from corroding the pump casing. Disassemble the water inlet filter screen, rinse sand, gravel and fibers off the screen to avoid clogging that could reduce water intake efficiency in subsequent use.
Drain and Dry
Empty residual water from the pump body to prevent internal parts from rusting due to prolonged water retention. For submersible pumps, place them in a well-ventilated, dry area to air-dry naturally, avoiding moisture buildup inside the motor.
Inspect Cables and Connectors
Check for damage, aging or cracking on the power cord and looseness in the plug. Verify the waterproof connectors are properly sealed; replace the sealing rings promptly if they show signs of aging or deformation.
II. Short-Term Storage Maintenance (For 1–3 Months of Inactivity)
Lubricate Key Components
Apply an appropriate amount of lubricating oil (select the grade specified in the equipment manual) to the pump bearings to reduce friction and wear of metal parts. If the impeller rotates sluggishly, turn it manually to clear any jammed impurities inside.
Sealing and Protective Treatment
Spray anti-rust agent on the cast iron surface of the pump body to prevent corrosion. Seal the water inlet and outlet with plastic film to keep dust and insects from entering the pump chamber.
Storage Environment Requirements
Store the pump indoors in a dry, well-ventilated and dark place, away from acidic and alkaline corrosive substances. Never store the pump upside down, as this may cause displacement of internal seals.
III. Long-Term Storage Maintenance (For Over 3 Months of Inactivity)
In-Depth Disassembly and Inspection
Disassemble the connection part between the pump body and motor, and inspect the wear condition of mechanical seals. If scratches or damage are found on the sealing surfaces, replace the seals immediately (mechanical seals are core components for preventing water leakage). Check the impeller for cracks or deformation and replace it promptly if damaged.
Motor Maintenance
Use a multimeter to test the insulation resistance of the motor windings, ensuring the resistance value meets equipment requirements (usually ≥5MΩ). If the resistance is too low, conduct drying treatment or contact professional maintenance personnel. Verify that the motor overheat protection device is functioning sensitively.
Regular Test Runs
Power on the pump for a test run of 5–10 minutes every 1–2 months (short-term dry running is permissible, but avoid idling for more than 15 minutes). This prevents moisture damage to the motor windings and maintains proper lubrication of the bearings.
