Advantages of vertical self-priming pumps for conveying corrosive liquids
Advantages of vertical self-priming pumps for conveying corrosive liquids:
1. When a general centrifugal pump is transporting liquid, when the liquid level is lower, it needs to be pumped to discharge water. For this purpose, a bottom valve is required at the pump inlet. Over time, the bottom valve is corroded or stuck, and needs to be exchanged or repaired, so it is inconvenient to use.
2. Submersible pumps are generally used to transport clean water and river water. When used for the transportation of corrosive liquids such as acid and alkali, it is prone to motor corrosion and leakage, which is very unsafe. When the pump is blocked by garbage, it is necessary to pull the pump to clean it, which is very inconvenient, so it is rarely used in practical applications.
3. So people created a submerged pump for low-level transport, and the submerged pump solved the problem of low-level transport. However, due to the use of the long axis, and the impeller has an unbalanced radial force, the entire shaft is also a cantilever structure, so that the deflection causes a large deflection at the impeller end. The longer the shaft, the greater the deflection. In order to solve this problem, a bearing is mounted on the shaft. However, since the whole shaft is a flexible shaft, the bearing is continuously subjected to unilateral wear, the wear amount is large, the bearing sway is severe, and the wear speed is accelerated, so the frequency of the submerged pump is high. And the shaft should not be made too long, generally within 2 meters. The bearings of the submerged pump are cooled and lubricated by the medium transported by the pump. If the pumped medium does not refrigerate the bearing and is lubricated (this happens when the pump is empty and the inlet is clogged with debris), it can burn or even burn the motor. The repair and installation of the submerged pump is very troublesome. Especially when transporting corrosive media, it is difficult to complete without lifting tools. The submerged pump solves the problem of low-level transport, but it also brings a lot of troubles in use. Shanghai Pat Pump Manufacturing Co., Ltd. introduces the patented vertical self-priming pump produced by foreign advanced technology. It is designed for the low-level liquid transportation. It can replace the long-axis submerged pump on the ground, and the self-priming height can reach 8 meters. It can be used as a bottom pump or a sweeping pump on board.
First, the advantages of the vertical self-priming pump instead of the submerged pump:
1. The pump is a vertical structure. Compared with the submerged pump of the same parameters, the weight is greatly reduced and the land occupation is also small. Since the shaft is installed in the vertical direction, the shaft seal is not easily leaked.
2. The self-priming pump cancels the long shaft, and also eliminates the bearing problem, greatly prolongs the maintenance period, and also reduces the vibration.
3. The parts that may be damaged and need to be repaired are on the ground, which brings great convenience to the maintenance. The inlet of the pump is only a hollow tube and does not require a bottom valve. If the inlet is blocked by garbage, the hollow tube can be cleaned by pulling it out, while the submerged pump requires the entire pump to be lifted.
4. The submerged pump needs to determine the depth of pumping when purchasing. If the depth of the liquid does not match the length of the pump shaft, the pump needs to be replaced. The vertical self-priming pump can pump different depths as long as it is equipped with hollow tubes of different lengths. There is no need to exchange itself.
5. The operation of the empty pump can still be maintained for a long period of time, so as to facilitate detection and take measures to prevent damage to the motor and reduce the loss caused by misoperation, and the safety is good.
6. The submerged pump must be installed directly above the liquid. The self-priming pump can be installed at the top or beside it, and even a vacuum-resistant hose can be used to suck the liquid that cannot be reached by the straight pipe, and the mobility is very strong.
Second, save investment: due to the frequent maintenance of the submerged pump, generally one pool (slot) needs to set up two pumps, one pump for maintenance and backup, huge investment, large maintenance. The self-priming pump can realize multiple pools (slots) and share one pump in parallel, saving investment. The self-priming pump can be used for intermittent operation of gas and liquid. It is not afraid of pumping out. It can save some intermediate equipment in the process flow, such as high level tank or low level tank, which greatly simplifies the process and saves you money.
Third, the principle and application of the Shangkai vertical self-priming centrifugal pump: The self-priming pump principle uses a unique patented impeller and separation disc to force the gas-liquid separation to complete the inhalation process. Its shape, size, weight and efficiency are similar to those of pipeline pumps. Vertical self-priming pumps do not require auxiliary equipment such as bottom valves, vacuum valves, and gas separators. It does not need to be filled when the normal production starts, and has a strong self-priming ability. It can replace the currently widely used submerged pump (low-level liquid transfer pump) and can be used as an auxiliary device such as a separator. It does not need to be filled when the normal production starts, and has strong self-priming ability. It can replace the currently widely used submerged pump (low liquid pump), and can be used as circulating pump, tank truck, self-priming pump, motorized pump. And other uses.
Fourth, the material: reinforced polypropylene, F46, cast steel, stainless steel, 304, 316, 316L.
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