The mining multi-stage pump is suitable for water supply and drainage in mines, factories and cities. It is used to transport clean water without solid particles or liquid with physical and chemical properties similar to clean water. The scope and area are very wide. The shaft seal of the equipment is generally sealed with packing, and mechanical seal can also be used according to user needs. The running direction of the device is viewed from the motor end to the pump as a clockwise rotation. How to use mine multi-stage pumps safely and efficiently? This is a problem that many first-time users often ask.
First of all, we introduce from the pump itself: the sealing of the pump is very good - the static joint between the inlet section, the middle section and the outlet section is sealed with molybdenum disulfide, and also sealed with a paper pad. It must be sealed with raw materials. To prevent water from entering the bearings at both ends, an "O" type apron and a water retaining ring are used for sealing. The rotating part of the pump and the fixed part are sealed by a sealing ring, a vane sleeve and a packing. A certain pressure of water is introduced into the filling chamber to provide water sealing and cooling. Always pay attention to the following points during the operation:
1. Observe the ammeter, listen to the sound, and judge whether the operation is normal;
2. Pay attention to observe whether the motor is overloaded, and prohibit the motor from running at over current;
3. Observe the leakage at the shaft seal and adjust it. Sometimes it is necessary to adjust the injection water to make a continuous drop shape.
4. Check if the oil ring of the sliding bearing rotates. The temperature of the rolling bearing should be less than 75 ° C;
5. Regularly check the gap between the two couplings, and replace the balancing device when approaching close;
6. Observe the water temperature of the balance pipe. When the water temperature rises quickly, the pump should be stopped to check whether the balance pipe is blocked.
7. Observe the pressure gauge and vacuum gauge. When there is an abnormality in the gauge pressure between the two, it is necessary to find out the cause in time;
8. Observe the water level to prevent no load;
9. When the water level is low, pay attention to whether the two shaft seals will inhale into the pump;
10. Pay attention to the operating conditions of the pump and the cooling water.
It should also be noted that the multi-stage pump should not be operated for a long time with the outlet valve fully closed; nor should it be operated at the hump in the performance curve. During operation, the valve on the inlet pipe should be fully opened. The valve closing time should not be long when starting. Not more than 2 to 3 minutes, otherwise, the temperature rise causes vaporization, which will damage the pump.
