Urban Drainage Pumping Station is also the city's infrastructure. It is the forefront of sewage treatment. It pumps the collected sewage into the trapping pipeline by a pump and sends it to the sewage treatment plant for treatment and discharge to rivers and rivers. During this process, In the water pump, gate valve, grille decontamination machine plays an important role. So, what are the common drainage pump problems? What are the exclusions?
　　
1, no water after start-up: there is air or water in the pump to accumulate gas, or the bottom valve is not strict irrigating water dissatisfaction, serious leakage of vacuum pump packing, sluice gate or beat the door closed lax.
　　
Exclusion: remove debris, replace the damaged rubber pad, change the direction of the valve; press or replace the new packing, close the gate valve or pat the door; increase the filling amount until the deflation plug does not bubble up; replace Cracked pipe; lower head, the pump nozzle into the submerged 0.5 meters.
　　
2, the pump does not turn when starting: the packing is too tight or clogged with debris between the impeller and the pump body, or the pump shaft, bearings, leakage ring rust live, or serious bending of the pump shaft.
　　
Exclusion: Loose packing, clear diversion trough; open the pump to remove debris, rust; remove the pump shaft to correct or replace the new pump shaft.
　　
3, the pump heat bearing damage: Rolling bearing or bracket cover gap is too small; shaft bending or two axes are not heart; tape too tight; lack of oil or poor oil quality; impeller balance hole clogging, impeller out of balance, increase The thrust to the side.
　　
Exclude: replace the bearing; remove the back cover, install the gasket between the bracket and the bearing seat; adjust the pump shaft or adjust the concentricity of the two shafts; adjust the tightness of the tape properly; add clean butter and butter to the bearing 60% of the gap; remove the blockage in the balance hole.
　　
4, after the start of traffic shortage: speed is not complete or belt slip, the speed is low; axial pump blade mounting angle is too small; lack of lift; suction stroke is high; the end of the valve, pipe and impeller partial blockage or impeller defect; Water leakage is serious.
　　
Exclude: restore the rated speed, remove the belt grease, adjust the belt tightness; adjust the blade angle, lower the pump installation location; sealed pump leak, compaction packing; remove clogs, replace the impeller; Department.
　　
1, no water after start-up: there is air or water in the pump to accumulate gas, or the bottom valve is not strict irrigating water dissatisfaction, serious leakage of vacuum pump packing, sluice gate or beat the door closed lax.
　　
Exclusion: remove debris, replace the damaged rubber pad, change the direction of the valve; press or replace the new packing, close the gate valve or pat the door; increase the filling amount until the deflation plug does not bubble up; replace Cracked pipe; lower head, the pump nozzle into the submerged 0.5 meters.
　　
2, the pump does not turn when starting: the packing is too tight or clogged with debris between the impeller and the pump body, or the pump shaft, bearings, leakage ring rust live, or serious bending of the pump shaft.
　　
Exclusion: Loose packing, clear diversion trough; open the pump to remove debris, rust; remove the pump shaft to correct or replace the new pump shaft.
　　
3, the pump heat bearing damage: Rolling bearing or bracket cover gap is too small; shaft bending or two axes are not heart; tape too tight; lack of oil or poor oil quality; impeller balance hole clogging, impeller out of balance, increase The thrust to the side.
　　
Exclude: replace the bearing; remove the back cover, install the gasket between the bracket and the bearing seat; adjust the pump shaft or adjust the concentricity of the two shafts; adjust the tightness of the tape properly; add clean butter and butter to the bearing 60% of the gap; remove the blockage in the balance hole.
　　
4, after the start of traffic shortage: speed is not complete or belt slip, the speed is low; axial pump blade mounting angle is too small; lack of lift; suction stroke is high; the end of the valve, pipe and impeller partial blockage or impeller defect; Water leakage is serious.
　　
Exclude: restore the rated speed, remove the belt grease, adjust the belt tightness; adjust the blade angle, lower the pump installation location; sealed pump leak, compaction packing; remove clogs, replace the impeller; Department.
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