Sewage pump is a kind of centrifugal impurities, with a variety of forms: such as submersible and dry two, the most commonly used diving type for the WQ-type submersible sewage pump, the most common dry sewage pump, such as W-type horizontal sewage pump And WL type vertical sewage pump two. Mainly used for conveying urban sewage, feces or liquid containing fiber, paper dust and other solid particles of the medium, usually the temperature of the transmission medium is not greater than 80 ℃. Since the conveyed medium contains entangled or bundled fibers. So the pump flow channel is easy to plug, the pump once blocked will make the pump can not work properly, or even burn the motor, resulting in poor sewage. To the city life and environmental protection have a serious impact.
How to extend the service life of sewage pump:
1, disable the power supply voltage abnormal boot
As the low-voltage power supply line is relatively long, the end of the line voltage is too low is common. When the phase voltage is lower than 198 volts, the line voltage is lower than 342 volts, the sewage pump motor speed decreases, when the rated speed of 70%, start the centrifugal switch will be closed, resulting in a long time to start the winding power and even burn Windings and capacitors. Conversely, the voltage is too high to cause the motor to overheat and burn the windings. Therefore, the sewage pump in the operation, the operator must observe the power supply voltage value at any time, if less than 10% of the rated voltage, higher than the rated voltage of 10% or more, the motor should be stopped to find out the cause and troubleshooting.
2, to confirm the correct direction of rotation of the motor
Should find out the direction of rotation of the motor, there are many types of sewage pump forward and reverse when the water can be, but reverse the amount of water, the current is large, the reversal of a long time will damage the motor windings.
3, the installation of leakage protector
Leakage protector is also called the security device, its role from the "Paul the device" can understand the three words. Because the sewage pump work in the water, easy to leakage caused by electrical energy loss or even lead to electric shock. If the leakage protector is installed, as long as the sewage pump leakage value exceeds the operating current value of the leakage protector (generally not more than 30 mA), the leakage protection device will cut off the sewage pump power, to ensure safety, while avoiding leakage, waste of electricity.
4, cable installation and submersible pump insulation resistance requirements
When installing the sewage pump, the cable should be overhead and the power cord should not be too long. Do not allow the cable to force the pump when it comes into the water or to prevent the power cord from breaking. Do not sink into the mud when the sewage pump work, otherwise it will lead to poor motor cooling and burn the motor windings. When installed, the insulation resistance of the motor should not be less than 0.5 megohms.
5, to avoid frequent switching
Do not frequently switch the sewage pump, this is because the pump will stop when the return flow, if the boot immediately, will start the motor load, resulting in starting the current is too large and burn the winding. As the start of a large current, frequent start will burn the sewage pump motor windings.
6, Mo to long-term overload of sewage pump work
In order to avoid long-term overload of sewage pump work, do not smoke a large amount of water and observe the current value at any time on the nameplate on the specified value, if found that the current is too large, should stop checking. In addition, the pump dehydration operation time should not be too long, so as not to overheat the motor and burned.
7, pay attention to routine maintenance
Usually check the motor, such as found under the cover with cracks, rubber seal ring damage or failure, etc., should be replaced or repair, to avoid water into the sewage pump.