Many large roofs such as factories, warehouses and public buildings now use roof siphon drainage systems. The design of the roof drainage system is key to the quality of the drainage. The key to the design is the following factors.
Weather strength
In general, the design of a roof siphon drainage system should be designed for a storm return period of not less than 5 years locally, and take 10 years mostly, although, of course, the specific circumstances may be appropriate due to the requirements of the building and will increase.
Catchment area
The calculation of the catchment area is the key to the initial design of a roof siphon drainage system. Only a more accurate calculation of the catchment area can ensure the normal operation of the whole system and the safety of the building. The collection area is the amount of rainfall collected. Finally the discharge can be carried out and the total area of the gutter can be calculated. Due to the climate and the intensity of storms in different areas due to climate and rainfall differences values are also different and each place has its own formula parameters. There is now a lot of shareware available to calculate the required rainfall storm intensity values for each area, simplifying the calculation steps and reducing the calculation time. The number of rainwater buckets can be determined after the corresponding rainwater bucket flow, roof siphon drainage system in too large flow and too small flow of rainwater buckets will cause waste, too large flow buckets will correspondingly make the pipe diameter increase, too small flow will increase the number of rainwater buckets.
the number of rainwater bucket model arrangement
After the flow calculation is completed, the number and model of rainwater buckets need to be determined. The number and type of rainwater bucket determinants not only depend on the total amount of water collected, but also the distance between two adjacent rainwater buckets in the drainage ditch must be less than or equal to 20 m, and the number of rainwater buckets must be met. This also meets the requirements for presence. Once the number of rainwater hoppers has been checked, the corresponding flow rate of the rainwater hopper can be determined. In a siphon system there is too much rainwater hopper flow and too little wasted flow. If the flow rate is too high, the pipes will increase accordingly. Too small a flow will increase the number of rainwater buckets.
System arrangement
According to the calculation data to determine the number of rainwater buckets and distribution position, in addition to the construction plan, draw the location of rainwater buckets and pipeline system layout design, but also need to carry out the system design.
