Advantages and Disadvantages of Vertical Mixed Flow Pump

Between the centrifugal pump and axial flow pump is a pump is commonly referred to as the mixed-flow pump, in terms of speed, its order from large to small axial flow pump, mixed flow pump, centrifugal pump, under normal circumstances, Mixed flow pump than the speed of 300-500 between the vertical mixed flow pump is a mixed flow pump product type, its own advantages are many, but there are also some shortcomings, the following is to introduce you.

    First, the advantages of vertical mixed-flow pump

    Vertical mixed-flow pump operation is relatively simple, in general, the vertical pump impeller is submerged in the water, vertical mixed-flow pump is the case, so you can directly start, which is a vertical mixed flow pump Large features.

    Vertical mixed flow pump installation area is still relatively small. But also contains the driver, including, compared with the horizontal pump, its installation area is only half of the horizontal pump.

    In addition, the vertical mixed-flow pump is also conducive to prevent cavitation phenomenon. Since most of the vertical pump impeller is submerged in the water, so you can take a larger number of NPSH, so the pump running at a larger than the planning point of the flow will reduce the probability of cavitation phenomenon.

    Second, the vertical mixed flow pump shortcomings

    As the vertical mixed flow pump is vertical axis, so its vertical is relatively long, which makes it in the demolition, assembly time, lifting height is relatively high, so the top of the pump should have enough space to meet the smooth , Which is a vertical mixed flow pump a major drawback.

Prevention of submersible sewage pump motor water coup

Taking into account the submersible sewage pump motor diving work for a long time, so the prevention of motor water is particularly important, once the motor water is likely to damage the submersible axial pump bearing and winding insulation, burn the motor, not only increase the maintenance time and maintenance costs, Also delayed the normal work. It can be seen that the prevention of water intake is the key to ensuring that the motor is sealed. Reasonable prevention of submersible sewage pump motor water.
    (1) regularly check the pump motor winding on the ground insulation resistance. Regular inspection of the insulation resistance of the pump motor windings, the value should be greater than the different temperature of the submersible axial pump insulation value requirements, or should be disassemble maintenance, if the water to be dry, and should check whether the ground is strong.
    (2) check the oil chamber sealing situation. Sewage pump in the prescribed medium after six months, should check the oil chamber sealing situation, such as oil found in water submersible axial pump or milk emulsion, according to the provisions of cleaning the oil room, if necessary, replace the mechanical seal, Conditions of the poor use of the sewage pump should be routinely overhauled. If the oil after the operation of a very short time to leak the probe that alarm, mechanical maintenance should be overhauled, such as mechanical seal damage, should be replaced or overhaul.
    (3) Check whether there is a leak in the service seal. Submerged pump leakage failure, mostly due to the aging of the sealing device, due to wear, then replace the new seal can achieve the purpose of preventing water.
    (4) Check if the leaky probe is out of order. Leakage probe failure, generally because the drain probe wire blown, overhaul the first leaky probe diving axial pump copper tube filled with epoxy resin filler, and then put the lead wire connected to each lead wire conductive And insulated from each other, and finally in the copper tube pouring epoxy resin, so to re-create a leaky probe. The lead wire on the probe is firmly connected with bolts and leads to the external junction box with the motor power cord, which ensures effective monitoring of the water intake problem.

Submersible sewage pump used in the process of five "can not"

Submersible sewage pump in the course of the failure may be caused by the use of improper maintenance, such failures can be completely avoided, which requires you to use the process of diving axial flow pump to grasp the basic knowledge of the use of submersible sewage pump, as far as possible Reduce the human problem caused by the fault. Summed up the use of diving sewage pump in the five "no", I hope to help you.
    First, the submersible sewage pump can not be dehydrated operation. Submersible sewage pump in the anhydrous test run, the time shall not exceed 5 minutes. In the pumping process, if the water level is declining should pay attention to not let the pump body exposed to work.
    Second, the submersible sewage pump can not start immediately after shutdown. After the shutdown can not start immediately, you must wait for the tube after the return of water to start before starting. If the start diving axial pump can not be water, should immediately stop to identify the cause.
    Third, into the water or put forward the water can not pull the cable. Submersible sewage pump into the water or put forward the water, you must pull the rope, absolutely can not pull the cable. If you want to carry, disassemble or carry out maintenance should first cut off the power.
    Fourth, into the water when not lying. Diving sewage pump diving depth is generally 0.5 to 3.0 meters, when diving into the water should be vertical lifting, can not lie, but can not fall into the mud.
    Fifth, submersible sewage pump can not be used for irrigation and drainage of high water content. Submersible sewage pump should not be frequent start, not for drainage of sediment concentration Diving Axial pump higher water or mud water. Pumps can be used outside the bamboo mesh to prevent the water weeds plug the pump grid or catch the pump impeller.