It is said that the Ministry is developing the manufacturing industry 'going out' strategic planning, strengthen coordination and guidance on the classification of enterprises. In order to cope with the increasingly global industrial development, we are bound to have an understanding of the current situation and development trend of the international stainless steel pump and water pump station.
With the stainless steel pump design and manufacturing technology and application of technology to improve the manufacture and production of stainless steel pump along large-scale, high-capacity, high-speed, high lift seriation, generalization and standardization direction. The automatic control level of pumping station is also higher and higher.
1 、large-scale, high-capacity
In the past few years in 2009, the rapid development of large-scale stainless steel pump technology, giant axial flow pump impeller diameter has reached 7m, submersible pump impeller diameter has reached lm. China's largest production capacity of 6000kW, axial flow pump mixed flow pump, 7000kW centrifugal pump 8000kW; high pressure boiler feed pump unit capacity has reached 60000kW; new type submersible centrifugal pump flow has reached 1800m3/h, the maximum amount of water to meet the head of 110m, 28800m3/h, and then expand the trend. In the station, there are a number of large pump station with novel structure, such as the "egg" type structure of pumping station, water pipe, tank combined pumping station etc.. With the promotion of the submersible pump in drainage, also appeared in a number of small space, less investment, the new structure of the large and medium-sized pumping stations, such as steel or reinforced concrete structure into the wet well pump room structure.
2 、high lift and high speed
With the pump cavitation, material strength and other issues continue to improve, the pump speed is also faster and faster. In 1980s, the international level of multi-stage centrifugal pump speed of 7500r/min, has now increased to 10000r/min. Increase the speed of the pump will inevitably increase the lift. 2009, the boiler feed pump single head has broken the record of 1000m, multi-stage pump head can reach more than 2000m. In order to further realize the high lift, must improve the speed of the pump. Later, with the continuous development of technology, the speed of the pump is further to the direction of high-speed development. In the pump industry, the development trend of high speed is a worldwide.
3、 serialization, generalization and standardization
Serialization, generalization and standardization of products are the inevitable requirement of modern industrial production technology (three). In 1975, the International Association for Standardization (ISO2858-1975E) established the main dimensions and specifications of single stage centrifugal pumps rated pressure 720kPa. The performance range of this standard pump is: the flow is 6.3 ~ 400m3/h, the head is from 25 to 125m. In 2009, in Europe, where the specification of the pump has been sold as a standard pump. Since 1958, in a unified model, classification, setting size and other aspects have also done a lot of work, bracket, suspension, bearing frame and main components of pump were has a series of standards, the product "three" level continues to increase.
4 、pumping station automation level gradually increased
In recent years in 2009, the automation equipment of pumping station is more and more perfect, and the level of automatic control is higher and higher. The modernization of the pumping station from the monitoring unit starting, running and stopping to optimize scheduling can be multistage pumping station system to achieve automatic control, the application of computer network technology and automatic control system in pumping station has become increasingly widely, management level also gradually improve.
With the atomic energy and fuel industry, the development of science and technology, further development requires a variety of special pump products to high speed, high temperature and high pressure resistance, high efficiency and large capacity; but also constantly improve the quality and level of the existing conventional products. In order to achieve this goal, we must carry on the innovation in the basic theory, the computation technology, the model test, the measuring method as well as the material choice, the processing technology and so on a series of links. In the design and operation management of pumping station, measures should be taken to maximize the efficiency of the working water pump and improve the level of automatic control.