Drainage pumping station design specification _ composition and classification of drainage pumping stations

drainage pumping stations, drainage pumping station design, drainage pumping station design specification

a, composition and classification of drainage pump station drainage pumping station includes: the basic component of the machine, pool, grille, auxiliary rooms, general also attach a substation. Machine set up between the pump unit and related accessories. Grille and suction pipe installation in collecting basin, collecting basin to some extent, can also adjust the nonuniformity of water, so that the water pump can work more evenly. Role is grille block bulky solid impurities in water, in order to prevent debris blocking and damage the pump. Drainage pump station according to its role in the drainage system, can be divided into midway pump stations and terminal station. Midway pump station is usually in order to avoid the main drain buried too deep. End pumping station is the entire town sewage or industrial enterprises of the pumped sewage wastewater treatment plant will be treated sewage irrigation or directly discharged into water body. According to the properties of drainage, generally can be divided into sewage ( Sewage and sewage) station, rainwater pumping station and pumping station of the confluence. Drainage pumping station pumping sewage water, water quality is poor, not only the water mixed with a lot of impurities. This is sewage and rainwater, pumping stations of the confluence of the universal, but their respective operation characteristics also is distinguishing. 1, sewage pumping station sewage pumping station is usually run (full-time Small sewage pumping station has run part-time) , should be determined according to the variation of water pump to start the work of the Numbers. Sewage pumping station sets pool key role to a certain extent, station operator can stop timing control set pool water level according to open pump. Because of the sewage pumping station demand flow is small, high lift, so often choose centrifugal pump. And a few large conveying pump station and asked for traffic is bigger, more choose mixed flow pump. Rainwater pumping station of rainwater pump station has to be determined according to the rainfall to start the number and size of the pump. Water pump for large flow, low head, usually choose submersible axial flow pump or mixed flow pump. Confluence confluence of the pump station and intercepting pump station, due to different intercepting facilities, adopts the way of river closure is different also, its operation mode and process are also different. Intercepting pump station with former intercepting and pump after closure in two forms. before intercepting pump station is on the inlet pipe of pump station by gravity flow will flow sewage into service within the scope of the drought connecting pipe of pump station, pump intercepting pump station is to point to by the pump will be dry after stream of people connecting pipe straight pumping station. Confluence pumping station not only undertake the daily sewage transportation, at the same time, also undertake the flood discharge, has the characteristics of sewage pumping station and rainwater pumping station, the difference is only a few more intercepting facilities. before intercepting pump station of intercepting facilities standing in front of the pump station set pool grille, well pump after intercepting pump station of intercepting facilities are located in Wells after the gate well pumping station. In addition, the confluence pumping station before open the rain water pump, must be approved by the central control room. Two drainage pumping stations, drainage pumping station design specification design depends on the inlet pipe buried depth of the channel, to the model of water flow, water pump unit and the Numbers of hydrological geological conditions and construction method etc. Choose the drainage pumping station design should from the cost, layout, construction, operation conditions into account. Here are several kinds of typical drainage pumping station shows its advantages and disadvantages and applicable condition. Figure 1 - Water pump is not more than four. Graphical structure condition is good, easy to use method of open caisson construction, can reduce the project cost, convenient pump start-up. According to the borehole water level automatic suction operation easily. Defect is: machine unit and accessory equipment layout is difficult, when the pump house is deep, workers and inconvenience, and the motor is easy to be affected with damp be affected with damp. Ventilation facilities should be taken into consideration because the motor deep underground, in order to reduce the temperature between the machine.

if this type horizontal instead of vertical centrifugal pump (pump in pumping station Or axial flow pump) , it can avoid the above shortcomings. Vertical centrifugal pump installation technology, however, the demand is higher, especially in the pump room is deeper, the shaft is too long, must set intermediate bearing and fixed bracket, so as to avoid the pump run time transmission shaft are disturbed. Due to this type pump can reduce the pump room area, reduce the engineering cost, and make electrical equipment operating conditions and operating conditions improve workers, so widely adopted in our country. Figure 1 - 3 is & type rectangular drainage pumping station, installed vertical pump, since the irrigation type work. Large pumping station with this type is more appropriate. stations for four or more long, use the rectangular between machines, in the aspect of the unit, the layout of pipe and accessories is relatively convenient, start the operation is simple, easy to realize automation. Electrical equipment in the upper, not easy be affected with damp be affected with damp, good condition of operation management. The high cost of defect is built. When the soil is poor, high underground water level, because of bad construction, unfavorable use.