thediscussionofwater-savingtechnologyaboutwatersupplyanddrainageinbuilding-外文文獻(xiàn)-文庫吧資料
2025-05-21 12:30本頁面
【正文】 of water. Because the time of discharge of these sanitary appliances can be adjusted within a certain range. On the other hand, these sanitary appliances can operate by themselves to prevent spread of bacterium. B. Adopt watersaving sanitary ware The amount of water volume of the flushing toilet in residence occupies about 30% ~ 40% water volume of the whole day. In current toilet of residence, big and urination Share the same toilet stool and adopt the same flushing water, the flushes water volume is larger or equal 11L. Water consumption is large. This is obviously a waste. In addition to the toilet bowl whose volume of flushing water is less or equal 6L has been promoted to use, there is a kind of toilet stool which has two gears’ cistern [4]. The flushing water is 3L when flushing urination, while flushing water is 6L when flushing shit. V. PROMOTE THE UTILIZATION OF HIGHQUALITY PIPE AND VALVE Galvanized steel pipe has been widely used in drinking water supply system in the internal building as a water main pipe. However, corrosion of galvanized steel is easy to produce and breed bacteria, which can not only cause serious secondary pollution for water quality, but also the leakage of corrosion can lead to the waste of architectural environment and water resources. China39。 2020 IEEEDOI 669668Reducing Valve can reduce dynamic pressure, static pressure。Although the code makes certain restrictive provision for the maximum pressure of water supply fittings and service pipe, this is considered from preventing the damage caused by high pressure of water supply fittings not from the angle of preventing overpressure flow. An experimental result of a watersaving tap shows that the maximum flow rate is L/s when tap fully open, the corresponding dynamic pressure is MPa and hydrostatic pressure is MPa. According to the rated flow q = 0. 15 L/s which is regarded as the standard, the flow rate when watersaving tap fully open is 3 times of the rated flow. In another measured survey for 67 taps, there were 47 taps which exceeded the rated flow [2]. The overlimit ratio reaches 61%. Therefore, the problem of overpressure flow in water supply system is serious and following measures should be adopted. A. Reasonably determine the pressure of water supply The pressure of water supply subarea should be acted according to Code for Design of Building of Water Supply and Drainage, while the best use hydraulic pressure of sanitary wares is between MPa and MPa, most of them are in overpressure flow. In recent years, branch pipe depression was widely used in projects, which became an important measure for watersaving. In the lower part of water supply subarea, the hydrostatic pressure of water supply after depression should take low value as possible on the condition that it satisfies the demand of rated flow of sanitary wares’ water supply fittings. It is suggested that, in higher part of water supply subarea, depression measures should be taken when the lowest hydrostatic pressure of sanitary wares’ water distribution points is more than MPa. B. Adopt depression measures Properly allocating relief fitting in water supply system means that hydraulic pressure should be limited within limiting value and reduce the threat of overpressure flow. 2020 International Conference on Digital Manufacturing amp。 techniques. I. INTRODUCTION Water is a strategic resource which is related to human survival and development. The total water resources in our country ranks sixth in the world, but the per capita possession of water resources is only a quarter of world average. The distribution of water resources is extremely uneven in our country, and twothirds of cities nationwide have varying degrees water shortage. In recent years, ci
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