What we often refer to as submersible sewage pump and pipeline sewage pump is actually a meaning. Submersible sewage pump is a kind of pump and motor connected together, and at the same time submerged under the liquid pump products. Our common submersible sewage pumps are: JBWQ series automatic submersible sewage pump, WQ submersible sewage pump, JYWQ automatic mixing sewage submersible sewage pump, QW series submersible sewage submersible sewage pump. Its performance parameters are flow, flow rate, matching power, rated current and so on. Impeller forms include open, semi-open, closed. Here we give that to explain the use of the pipeline under the sewage pump and piping works and installation requirements for sewage pumps.
The purpose and working principle of the pipeline sewage pump
The use of pipeline sewage pump
Before the pipeline sewage pump is turned on, the pump inlet and the pump chamber are filled with liquid, that is, the irrigation pump. After starting, the drive machine drives the impeller to rotate at high speed. The liquid rotates under the rotation of the high-speed rotating impeller to generate centrifugal force. Under the action of the centrifugal force, the liquid pushes out along the flow path of the impeller, and the discharged liquid is under the action of the pressure in the pump chamber. , Drain from the pump outlet into the pipeline.
At this point, the center of the impeller is in a vacuum and low pressure area, there is neither gas nor liquid, and the surface of the water has the role of atmospheric pressure, the surface pressure is high, the inlet pressure of the pump inlet is low, the water is sucked into the pump chamber, and the centrifugal force The discharge under the effect. Reciprocating work continuously draws in water and discharges it to the point of suction. The submersible sewage pump is beautiful in appearance, simple in structure, convenient to install and use, and can be used in a mobile manner with flexibility.
Sewage pumps, also called sewage pumps, can be used to transport sewage containing organic, inorganic or mineral solids.
The sewage pump is mainly a single-stage centrifugal pump. Usually it does not have a self-priming function. It pumps the sewage through the impeller and is a kind of pump that can work in the transmission medium. The shaft seal of the pump uses a wear-resistant mechanical seal.
The use of sewage pumps: Sewage pumps can be widely used in food, construction, paper, sugar, metal (such as metal electrolysis), mining and water resources (such as cooling water, desalination and desalination) and other industries. According to the different requirements. The type of sewage pump can be divided into municipal sewage pump and industrial sewage pump. The municipal sewage pump is mainly used for the pumping of the following medium: municipal sewage (such as residential sewage, fecal sewage), wastewater (precipitation tank cleaning water), sludge (such as activated sludge, raw sludge, digested sludge, and inoculation Sludge): Rainwater.
Digested sludge refers to the sludge obtained after anaerobic digestion of raw sludge; inoculated sludge refers to the imported activated sludge under the new commissioning conditions. However, sludge-like liquids are best suited for sewage pumps.
For industrial sewage pumps. The choice of suitable materials is important because industrial wastewater may be highly corrosive or abrasive. The pump housing can be retrofitted with an easily replaceable pump body ring or a wear protection device made of high wear resistant material.
Pipeline sewage pump and its working principle
Sewage pump is a kind of pump and motor connected, and at the same time submerged into the liquid pump products, compared with the general horizontal pump or vertical sewage pump, sewage pump compact structure, small footprint. Easy installation and maintenance The small sewage pump can be installed freely. Large-scale sewage pump is generally equipped with an automatic coupling device for automatic installation and installation and maintenance are very convenient. Long running time. The sewage pump is coaxial with the pump and the motor. 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. There are no problems such as cavitation damage and flooding. In particular, the latter point brings great convenience to the operators. Small vibration and noise, low motor temperature rise, no pollution to the environment.
Sewage pump mechanical characteristics
1 The unique single-blade or double-blade impeller structure greatly improves the ability to pass through the dirt, effectively passing 5 times the fiber material of the pump bore and solid particles with a diameter of about 50% of the pump bore diameter.
2 The mechanical seal adopts a new type of hard and corrosion-resistant tungsten carbide material, and at the same time, the seal is modified into a double-end surface seal so that it can be operated in the oil chamber for a long time, and the pump can be continuously operated for more than 8,000 hours.
3 The overall structure is compact, small size, low noise, significant energy-saving effect, easy maintenance, no need to build a pump room, can work in the water, and greatly reduce the project cost.
4 The pump seal oil chamber is equipped with a high-precision anti-jamming leak detection sensor, and embedded in the stator winding thermal element, absolute protection of the pump motor.
5According to the needs of users, it can be equipped with a fully automatic safety protection control cabinet, which can absolutely protect the leakage, leakage, overload and over-temperature of the pump and improve the safety and reliability of the product.
6 The float switch can automatically control the start and stop of the pump according to the change of the required liquid, without special care, and it is extremely convenient to use.
7 It can be equipped with a dual-rail automatic coupling installation system according to the user's needs. It brings great convenience to installation and maintenance. People do not need to enter the sump for this purpose. 8 Can be used within the full head range to ensure that the motor will not be overloaded.
9 There are two different installation methods, fixed automatic coupling installation system, mobile free installation system.
Application scope of pipeline sewage pump
It is suitable for the effluent and wastewater containing fibrous dirt, sludge and solid particles of a certain size.
1) The submersible sewage pump imported from foreign countries and wholly foreign-owned brands can be used for the discharge of solid waste (20-φ80mm) and various long-fibre impurities and wastewater. Drained sewage, wastewater temperature does not exceed 60 °C (part of well-known foreign brand products up to 90 °C), pH value of 5 ~ 9 (part of the well-known foreign brand products for 6 ~ 13), suitable for construction of monomer and construction projects Project use.
2) AS and AV adopt vortex impellers, which are suitable for pumping sewage containing solid particles; QW (WQ) and JYWQ series adopt runner impellers, which are suitable for pumping fibrous sewage, sludge and other sewage and wastewater; AS, The AV, QW(WQ) series and foreign brands of common submersible sewage pumps are suitable for short residence time, less sediment, and waste water pumping; the JYWQ series automatically mixes submersible sewage pumps and can be used for impurities in the bottom of pump pits. A certain degree of stirring.
Pipeline sewage pump mechanical advantages
Submersible sewage pump is a 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, the sewage pump has obvious advantages in the following aspects:
1. Compact structure, small footprint. The sewage pump can be directly installed in the cesspool 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 installation and maintenance. The small sewage pump can be installed freely. The large sewage pump is generally equipped with an automatic coupling device for automatic installation and installation and maintenance are very convenient.
3. Long running time. The sewage pump is coaxial with the pump and the motor. 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.
Pipeline sewage pump installation requirements
The key to the installation technology of the pipeline sewage pump is to determine the installation height of the pipeline sewage pump that is the suction process. This height refers to the vertical distance from the source water surface to the centerline of the centrifugal pump impeller. It must not be confused with the allowable suction height. The vacuum height allowed on the water pump product specification or on the nameplate indicates that the suction height is the vacuum level at the inlet section of the water pump. In addition, the test was performed under the conditions of a standard atmospheric pressure and a water temperature of 20°C. It does not take into account the flow conditions of the suction piping. The installation height of the pump should be the part of the value remaining after allowing the vacuum height to be deducted after the loss of the suction line of the suction pipe. It should overcome the actual height of the topographic suction. The installation height of the pump must not exceed the calculated value. Otherwise, the centrifugal pump will not be able to pump water. In addition, the size of the influential calculated value is the resistance loss head of the suction pipe. Therefore, the shortest pipe layout should be adopted, and fittings such as the elbow should be installed as small as possible, and some water pipes with appropriate diameters can also be considered to reduce the flow rate in the pipe.
It should be pointed out that when the elevation and water temperature of the installation site of the Lishen Pipeline Sewage Pump differ from the test conditions, if the local elevation is more than 300 meters or the pumped water temperature exceeds 20 degrees Celsius, the calculated value shall be corrected. That is, the atmospheric pressure at different elevations and the saturation vapor pressure above the water temperature of 20°C. However, when the water temperature is below 20°C, the saturated steam pressure is negligible. From the installation technology of the Lishen Pipeline Sewage Pump, the suction pipe requires strict sealing and cannot leak or leak. Otherwise it will damage the vacuum at the inlet of the centrifugal pump, so that the centrifugal pump can reduce the amount of water, even when serious. Sheung Shui. Therefore, we must do a good job in the interface of the pipeline to ensure the construction quality of the pipeline connection.
Summary: The above is related to the purpose and working principle of the pipeline sewage pump and the installation requirements of the pipeline sewage pump. It is for reference only and hopes to help everyone. If you want to know more related information, you can pay attention to this website information.
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