The advantage of vertical self - priming pump in low-level corrosive liquid transportation is that when the liquid is conveyed by centrifugal pump, when the liquid level is below, it needs to be pumped to the water. This required the installation of the pump inlet valve. For a long time, corrosion or bottom valve is a place for exchange or repair is needed, so it is not easy to use. The submersible pump is usually used to transport water and water, while the acid and alkali and other corrosive liquids are prone to motor corrosion and leakage, so it is unsafe. The pump must be pulled up to clean up when the pump is blocked, so it is very inconvenient, so it is rarely used in practical application. So people have created a liquid pump to carry down the low delivery, the liquid pump to solve the problem of low transport. However, because of the long axis and the unbalanced radial force of the impeller, the whole shaft is a cantilever structure, so there is a large deflection at the impeller end when it is rotated. The longer the axis, the greater the deflection. In order to solve this problem, a bearing is installed on the shaft. However, because the whole shaft is a flexible shaft, the bearings are constantly subjected to unilateral wear and wear, and the bearing is shaking vigorously, and the wear speed is accelerated. Therefore, the damage frequency of the submerged pump is relatively high. And the shaft should not be done too long, generally within 2 meters. The bearing of the pump is cooled and lubricated by the medium carried by the pump. If the medium is not refrigerated and lubricated by the pump, which will happen when the air pump is blocked with the imported material, it will burn and even burn the motor. And the repair and installation of the pump is very troublesome. In particular, there is no lifting tool that is difficult to complete when the corrosive medium is transported.
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