In actual work, for a wear-resistant mining centrifugal water pump, head and flow are two important parameters. When the model of wear-resistant mining centrifugal water pump is determined, its power consumption is proportional to the actual flow rate of the pump. Proportional. The flow rate of the water pump will decrease with the increase of the head, so the higher the head, the smaller the flow and the lower the power consumption. Conversely, the lower the head, the greater the flow, and the greater the power consumed. In order to prevent the motor from overloading, it is generally required that the actual pumping head of the water pump should not be less than 60% of the calibrated head. When the high head is used for the drainage of too low head, the motor is easy to be overloaded and generate heat, and it can burn the motor in severe cases. In the operating procedures of the water pump post, gate valves are required to be installed on the outlet pipe. In order to reduce the motor load when the pump is started, the gate valve should be closed first, and then gradually open the gate valve after 1 to 2 seconds after the motor starts.
Lift selection of wear-resistant mining centrifugal water pump
The head of the wear-resistant mining centrifugal water pump is not the lifting height. It is particularly important to know this point for the selection of the water pump. The pump lift is approximately 1.15~1.20 times the lifting height. For example, the vertical height from a water source to the place where the water is used is 20 meters, and the required lift is about 23 to 24 meters. When selecting a water pump, the head on the nameplate of the pump should be close to the required head. In this case, the pump has the highest efficiency and will be more economical to use. But it is not necessarily required to be absolutely equal. Generally, as long as the deviation does not exceed 20%, the pump can work in a more energy-saving situation.
Selection of pump flow rate and pipeline arrangement of wear-resistant mining centrifugal water pump
Generally, the flow rate of wear-resistant mining centrifugal water pumps should not be too large, otherwise it will increase the cost of purchasing water pumps. Specific problems should be analyzed in detail, and various factors such as drainage volume should be considered comprehensively, and the flow rate should be appropriate to ensure the needs of normal production. When arranging the pipeline, the following items should be noted:
(1) Reasonably choose the pipe diameter, the pipe diameter is large, the liquid flow speed is small, the resistance loss is small at the same flow rate, but the price is high, and the pipe diameter is small, which will cause the resistance loss to increase sharply and increase the head of the selected pump. With the increase of the belt power, the cost and operating expenses are increased. The following is a table of pipes, flow rates and flow rates that are commonly seen in work.
(2) The discharge pipe and its pipe joints should consider the maximum pressure that it can withstand.
(3) The pipeline layout should be as straight as possible, minimize the accessories in the pipeline, and minimize the length of the pipeline. When it is necessary to turn, the bending radius of the elbow should be 3 to 5 times the diameter of the pipeline, and the angle should be as large as possible 90°C.
(4) Valves (ball valves or stop valves, etc.) and check valves must be installed on the discharge side of the pump. The valve is used to adjust the working point of the pump. The check valve can prevent the pump from reversing when the liquid flows backwards and prevent the pump from being hit by water hammer. (When the liquid flows backwards, it will produce huge reverse pressure and damage the pump).
