Sewage pump is a kind of centrifugal impurities, with many forms: such as submersible and dry two, the most commonly used submersible WQ submersible sewage pump, the most common dry sewage pumps such as W-type horizontal sewage pump And WL vertical sewage pump two. Mainly used to transport urban sewage, manure or liquid containing fibers, paper dust and other solid particles of media, the medium is usually the temperature is not more than 80 ℃. Due to the media being conveyed contain easily entangled or bunched fibers. Therefore, the kind of pump flow channel is easy to block, once the pump is blocked, the pump can not work normally, or even burn the motor, resulting in poor drainage. To urban life and environmental protection have a serious impact. How to extend the life of the sewage pump 1, prohibit the power supply voltage abnormal boot As the low-voltage power supply line is longer, the end of the line voltage is too low. When the phase voltage is lower than 198V and the line voltage is lower than 342V, the speed of the sewage pump motor will drop. When it reaches 70% of the rated speed, the start centrifugal switch will be closed, causing the starting winding to energize for a long time and even burn out Windings and capacitors. In contrast, overvoltages cause the motor to overheat and burn the windings. Therefore, the sewage pump operation, the operator must always observe the power supply voltage value, if less than 10% of the rated voltage below 10% above the rated voltage, the motor should be stopped to find out the cause and troubleshooting. 2, confirm the correct direction of motor rotation 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 the reversal of the small amount of water, the current is large, the reversal of a long time will damage the motor windings. 3, leakage protection installation Leakage protection, also known as lifeguard, its role from the "lifebinder" these three words can be understood. Because the sewage pump work under water, easy to leakage caused by loss of energy or even lead to electric shock accident. If leakage protector is installed, the leakage protector will cut off the power of the sewage pump to ensure safety as long as the leakage value of the sewage pump exceeds the operating current value of the earth leakage protector (usually not more than 30 milliamps), so as to avoid leakage and waste of electric energy. 4, cable installation and submersible pump insulation resistance requirements Install the sewage pump, the cable should be overhead, the power cord should not be too long. Sewage pump or put it out when the cable is not force, so as not to cause the power cord rupture. Do not sink into the mud when the sewage pump work, otherwise it will lead to poor motor cooling and motor windings burn. When installed, the insulation resistance of the motor should not be less than 0.5 megohms. 5, to avoid frequent switching Do not switch the sewage pump frequently, this is because the pump will stop when the return flow, if immediately start, the motor load will start, leading to the starting current is too large and burn the winding. As the start-up current, frequent start-up will also burn the sewage pump motor windings. 6, let the sewage pump long-term overload In order to avoid long-term overload of the sewage pump, do not pump large amounts of water and observe whether the current value is on the nameplate. If it is found that the current is too large, it should be shut down for inspection. In addition, the water pump running time should not be too long, so as not to overheat the motor and burned. 7, pay attention to routine maintenance Normally, always check the motor. If there is a crack in the lower cover or damage or failure of the rubber seal ring, it should be promptly replaced or repaired to prevent the infiltration of water into the sewage pump. Sewage pump precautions (1) Check the sewage pump pipe and joints with loose phenomenon. Turn the sewage pump by hand and see if the sewage pump is flexible. (2) Add bearing lubricating oil to the bearing body, observe the oil level should be at the center line of the oil standard, lubricating oil should be replaced or replenished promptly. (3) Unscrew the diversion plug of the sewage pump body, and pour the water (or slurry). (4) close the outlet valve and outlet pressure gauges and import vacuum gauge. (5) Move the motor to see if the motor is steered correctly. (6) start the motor, when the sewage pump is running, open the outlet pressure gauge and inlet vacuum pump as it shows the appropriate pressure, and gradually open the gate valve, while checking the motor load conditions. (7) try to control the sewage pump flow and head in the range indicated on the sign to ensure that the sewage pump at the highest efficiency point of operation, in order to get the maximum energy saving effect. (8) sewage pump during operation, the bearing temperature can not exceed the ambient temperature 35 ℃, the maximum temperature of not more than 80 ℃. (9) If it is found that the sewage pump has an abnormal sound, stop immediately to check the cause. (10) To stop using the sewage pump, first close the gate valve, pressure gauge, and then stop the motor. (11) sewage pump in the first month of work, after 100 hours to replace the oil, after each 500 hours, oil change time. (12) Often adjust the packing gland to ensure normal drip leakage in the packing room. (13) Regular inspection of the sleeve wear, wear and tear should be promptly replaced. (14) When sewage pump is used in winter season, after parking, it is necessary to unscrew the drain plug at the lower part of the pump to release the medium. Prevent cracking. (15) long-term disabled sewage pump, pump all the necessary open, dry the water, the rotating parts and joints coated with grease installed. Chevrolet Roller Shutter Covers
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