Single riser drainage system is one of the pipe fittings of sewage drainage system in building area, which is a new technology and is replacing the original double riser drainage pipe network system.
In architecture, the risers of water supply and drainage system of pipe network are divided into: ordinary single riser, ordinary double riser and special single riser system. Single riser drainage system: the drainage of building pipe network is realized by one pipe, and the drainage and ventilation in one pipe are realized by special pipe fittings. This new technology is mainly used in multi-storey and high-rise buildings with 10 floors and will replace the common double riser system. Special single riser system can be divided into two categories: Suvito system and enhanced cyclone system. Different from Suwito, cyclone separator is based on the idea that when water flows vertically in the pipeline, it flows along the inner wall of the pipeline. If the water flows into the cyclone, an air channel will naturally form in the center of the riser, which is beneficial to the smooth flow of air and drainage.
1) The special single riser system technology originated in Europe and has been used in Europe, America and Japan for 30 or 40 years. 1969 SOUBENTO technology imported from Switzerland has been continuously improved in practical use for many years. Special single riser drainage system is widely used in high-rise residential buildings, hotels, hospitals and other places in Japan, and it is in good condition. After it was introduced into China, according to the actual drainage situation, the internal diameter of the joint was increased and the blade angle was adjusted. Under the premise of not destroying the water seal of the appliance, the maximum water flow capacity of the riser was met, the water seal loss value was controlled below 25mm, and the positive and negative air pressure in the pipe was within 40mmAq, which was the maximum drainage within the allowable range and fully met the drainage requirements of super high-rise buildings.
2) The earliest domestic code was "Code for Design of Special Single Riser Drainage System" CESC 79: 96, and the new code only established the code for special single riser system in 2009. Therefore, the domestic single riser system has only recently been put on the market, and few domestic manufacturers have patents and produce single risers. The special single riser system has the advantages of saving materials and large drainage flow, which makes up for the shortcomings of ordinary single riser and ordinary double riser. This is the power of science and technology and the necessity of social development. Excellent systems will replace and eliminate backward systems, and the prospect of dedicated single riser system will contribute to the construction of social urbanization.