Analysis Of The Causes And Solutions Of Submersible Pump Failures (TWO)

Jun 13, 2024

FIVE.In the pipeline of a submersible pump, there is often obvious water leakage at the connection of the pipeline or flange, and the causes and treatment methods
① The pipeline itself has defects and has not undergone pressure testing;
② The gasket joint at the flange connection is not properly handled;
③ The flange bolts were not tightened in a reasonable manner; Defective pipes should be repaired or even replaced. If the center deviation of the connecting pipes is too large, they should be removed and rearranged. After alignment, the connecting bolts should be inserted and tightened in a basically free state. After all pipelines are installed, the system's pressure resistance strength and leakage test should be conducted. It must be replaced with a new one.
SIX.Internal leakage of submersible pump
When the submersible pump leaks, it causes insulation damage, bearing immersion, and alarm system alarm, forcing the unit to stop running.
The main reason is that the dynamic seal (mechanical seal) or static seal (cable inlet special seal, 0-type sealing ring) of the submersible pump is damaged, causing water seepage, and the power or signal cable is damaged, causing water seepage. Various alarm signals such as water immersion, leakage, humidity, etc. alarm shutdown; Before installation, the quality of each sealing component should be checked; Ensure good contact between the end faces of each sealing component during installation; Before operation, check the insulation resistance between phases and ground of the motor, as well as whether the sensing components of each alarm system are intact. When the above faults occur during operation, replace all damaged seals and cables and dry the motor. Seals and cables that have been disassembled must not be reused.
SEVEN.Reverse operation of submersible pump during shutdown
1. After the power outage of the water pump motor, the water pump will reverse, mainly due to the failure of the check valve or flap valve in the outlet pipeline.
2. Before installation, the troubleshooting measures should be checked. The installation direction of the check valve should be correct, the center of the tapping valve should be aligned, and the opening and closing should be flexible and flexible. Regularly inspect the check valve or flap door during operation, repair or replace the damaged parts with quality assurance check valves or flaps.
EIGHT.Wiring method for submersible pumps
Deep well submersible pumps usually only have outgoing cables when leaving the factory, and users need to install additional cables themselves. Therefore, when connecting cables, it is important to pay attention to the correct method, otherwise it will have a significant impact on the use of deep well submersible pumps.