Submersible sewage pump is a kind of pump and motor connected, and at the same time submerged under the liquid pump products, compared with the general horizontal pump or vertical sewage pump, submersible sewage pump has obvious advantages in the following aspects:
1. Compact structure and small footprint. The submersible sewage pump can be directly installed in the sewage pool because it is submerged under the liquid. There is no need to build a special pump room to install the pump and the machine, which can save a lot of land and infrastructure costs.
2. Easy to install and maintain. Small submersible sewage pumps can be installed freely. Large submersible sewage pumps are generally equipped with automatic coupling devices for automatic installation and installation and maintenance are very convenient.
3. Long running time. Submersible sewage pump Because the pump and the motor are coaxial, the shaft is short and the rotating parts are light. Therefore, the load (radial) on the bearing is relatively small, and the service life is much longer than that of a general pump.
4. There are no problems such as cavitation damage and flooding. In particular, the latter point brings great convenience to the operators.
5. Small vibration and noise, low motor temperature rise, no pollution to the environment.
Due to the above advantages, submersible sewage pumps have attracted more and more attention from people, and the scope of use has also become wider and wider. From the original purely used to transport clean water to the present, various submersible sewage, industrial wastewater, and construction can be transported. Site drainage, liquid feed, etc.
It plays a very important role in various industries such as municipal engineering, industry, hospitals, architecture, restaurants, and water conservancy construction.
However, everything is divided into two parts. The most critical issue for submersible sewage pumps is the usability issue. Submerged sewage pumps are used under liquid conditions, and the transport medium is mixed liquid containing solid materials. Close to the motor, the pump is arranged vertically, and the weight of the rotating part is in the same direction as the impeller is subjected to the water pressure. These problems make the requirements of the submersible sewage pump in terms of sealing, motor bearing capacity, bearing arrangement and selection, etc. higher than that of a general sewage pump.
In order to improve the life of submersible sewage pumps, most domestic and foreign manufacturers are now thinking of ways to protect the pump system, that is, when the pump leaks, overload, over-temperature and other faults can be automatically alarmed, and automatically shut down for repair. However, we believe that it is necessary to set up a protection system in the submersible sewage pump, which can effectively protect the safe operation of the electric pump.
But this is not the crux of the problem. The protection system is only a remedy after the pump failure. It is a passive method. The key to the problem should be to start from the root and completely solve the problem of the pump in terms of sealing, overload, etc. This is a more proactive approach. For this purpose, we applied the sub-impeller fluid dynamic sealing technology and the pump's no-overload design technology to the submersible sewage pump, which greatly improved the pump sealing and carrying capacity, and prolonged the service life of the pump.
3. Selection of hose pump tubes
The key component of the hose pump is the tube, which is the only part of the pump that flows through. Only the hose meets the process requirements, the pump can work normally, so it should be selected according to the purpose of use and the nature of the medium being transported. Common tube grades are: Tygon (R3603, common type): inexpensive, non-corrosive, generally used in the laboratory, can be used as a good vacuum system pump; Tygon (special type): can transport hydrocarbon media, the most suitable For gasoline, fuel oil and lubricating oil; Viton: can transport special corrosive chemicals and reagents, but expensive, short life; Silicone: in line with UADA (rubber formulation testing solvent) standard and FDA (rubber formulation testing solvent) standard, Wide operating temperature range, hardened due to temperature influence, moderate price, long service life, when the pump head rotation speed is 200r/min, there is still some elasticity after working for 450h.
The selection of pipes mainly considers the following factors: corrosion resistance, operating conditions (pressure, temperature, flow, etc.), availability of toxicity, and price. These conditions affect each other and must be fully weighed before economic rationality can be achieved. Due to the long service life of the silicone tube, the continuous operation time can reach more than 1200h when the pump head speed is 50r/min, the elasticity is good, the chemical stability is high, the product is not toxic, the price is not expensive, and the supply is sufficient. widely used.
4. Hose pump application and effect
Hefei Sifang Phosphate Compound Fertilizer Co., Ltd. (formerly the Anhui Jianghuai Phosphate Mine) was originally used to transport slurry. It was four diaphragm pumps with a conveying distance of 30m and a gap of mm (2 units in parallel and 2 units in relay). Now after the process transformation, a hose pump with an inner diameter of hose of 65mm is used instead of the original diaphragm pump.
The hose pump has a one-time low investment, a long maintenance cycle, low maintenance costs, and reduced operating costs.
5. Conclusion
In the early 1980s, along with the rapid development of the rubber and plastics industry, new materials with good elasticity and corrosion resistance and new varieties of pipes continued to emerge, and a large number of hose pumps emerged. Its varieties and products were close to 1/1 of the same type of pumps. 3. Hose pumps have been used in the quantitative transport of laboratory fluids, spray granulation of chemical plants, transportation of concentrates, concentrated pulps, saturated brines, and transportation of sediment sludge from sewage treatment plants, especially in recent years. The application of fertilizers has achieved more obvious economic benefits and is worth promoting.
1. Compact structure and small footprint. The submersible sewage pump can be directly installed in the sewage pool because it is submerged under the liquid. There is no need to build a special pump room to install the pump and the machine, which can save a lot of land and infrastructure costs.
2. Easy to install and maintain. Small submersible sewage pumps can be installed freely. Large submersible sewage pumps are generally equipped with automatic coupling devices for automatic installation and installation and maintenance are very convenient.
3. Long running time. Submersible sewage pump Because the pump and the motor are coaxial, the shaft is short and the rotating parts are light. Therefore, the load (radial) on the bearing is relatively small, and the service life is much longer than that of a general pump.
4. There are no problems such as cavitation damage and flooding. In particular, the latter point brings great convenience to the operators.
5. Small vibration and noise, low motor temperature rise, no pollution to the environment.
Due to the above advantages, submersible sewage pumps have attracted more and more attention from people, and the scope of use has also become wider and wider. From the original purely used to transport clean water to the present, various submersible sewage, industrial wastewater, and construction can be transported. Site drainage, liquid feed, etc.
It plays a very important role in various industries such as municipal engineering, industry, hospitals, architecture, restaurants, and water conservancy construction.
However, everything is divided into two parts. The most critical issue for submersible sewage pumps is the usability issue. Submerged sewage pumps are used under liquid conditions, and the transport medium is mixed liquid containing solid materials. Close to the motor, the pump is arranged vertically, and the weight of the rotating part is in the same direction as the impeller is subjected to the water pressure. These problems make the requirements of the submersible sewage pump in terms of sealing, motor bearing capacity, bearing arrangement and selection, etc. higher than that of a general sewage pump.
In order to improve the life of submersible sewage pumps, most domestic and foreign manufacturers are now thinking of ways to protect the pump system, that is, when the pump leaks, overload, over-temperature and other faults can be automatically alarmed, and automatically shut down for repair. However, we believe that it is necessary to set up a protection system in the submersible sewage pump, which can effectively protect the safe operation of the electric pump.
But this is not the crux of the problem. The protection system is only a remedy after the pump failure. It is a passive method. The key to the problem should be to start from the root and completely solve the problem of the pump in terms of sealing, overload, etc. This is a more proactive approach. For this purpose, we applied the sub-impeller fluid dynamic sealing technology and the pump's no-overload design technology to the submersible sewage pump, which greatly improved the pump sealing and carrying capacity, and prolonged the service life of the pump.
3. Selection of hose pump tubes
The key component of the hose pump is the tube, which is the only part of the pump that flows through. Only the hose meets the process requirements, the pump can work normally, so it should be selected according to the purpose of use and the nature of the medium being transported. Common tube grades are: Tygon (R3603, common type): inexpensive, non-corrosive, generally used in the laboratory, can be used as a good vacuum system pump; Tygon (special type): can transport hydrocarbon media, the most suitable For gasoline, fuel oil and lubricating oil; Viton: can transport special corrosive chemicals and reagents, but expensive, short life; Silicone: in line with UADA (rubber formulation testing solvent) standard and FDA (rubber formulation testing solvent) standard, Wide operating temperature range, hardened due to temperature influence, moderate price, long service life, when the pump head rotation speed is 200r/min, there is still some elasticity after working for 450h.
The selection of pipes mainly considers the following factors: corrosion resistance, operating conditions (pressure, temperature, flow, etc.), availability of toxicity, and price. These conditions affect each other and must be fully weighed before economic rationality can be achieved. Due to the long service life of the silicone tube, the continuous operation time can reach more than 1200h when the pump head speed is 50r/min, the elasticity is good, the chemical stability is high, the product is not toxic, the price is not expensive, and the supply is sufficient. widely used.
4. Hose pump application and effect
Hefei Sifang Phosphate Compound Fertilizer Co., Ltd. (formerly the Anhui Jianghuai Phosphate Mine) was originally used to transport slurry. It was four diaphragm pumps with a conveying distance of 30m and a gap of mm (2 units in parallel and 2 units in relay). Now after the process transformation, a hose pump with an inner diameter of hose of 65mm is used instead of the original diaphragm pump.
The hose pump has a one-time low investment, a long maintenance cycle, low maintenance costs, and reduced operating costs.
5. Conclusion
In the early 1980s, along with the rapid development of the rubber and plastics industry, new materials with good elasticity and corrosion resistance and new varieties of pipes continued to emerge, and a large number of hose pumps emerged. Its varieties and products were close to 1/1 of the same type of pumps. 3. Hose pumps have been used in the quantitative transport of laboratory fluids, spray granulation of chemical plants, transportation of concentrates, concentrated pulps, saturated brines, and transportation of sediment sludge from sewage treatment plants, especially in recent years. The application of fertilizers has achieved more obvious economic benefits and is worth promoting.
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