Siphon drainage is a drainage method of building roof drainage, which plays an important role in rainwater drainage of large buildings and artistic buildings. Siphon drainage is composed of siphon rainwater bucket, siphon drainage pipe and fixing system. The height of the building roof is used to make rainwater have potential energy, which makes the siphon effect when the pipe is full. The rainwater continuously flows through the rainwater suspension pipe and generates the maximum negative pressure when it is transferred to the rainwater riser. Next, Bian Xiao introduced the characteristics of siphon drainage pipe and the matters needing attention in siphon drainage installation.

Characteristics of siphon drainage pipe

1. The rainwater bucket is flexibly arranged on the roof, which can better adapt to the artistic modeling of modern buildings and easily meet the rainwater discharge of irregular roofs.

2. The single bucket has a large displacement and few openings in the roof, which reduces the probability of roof leakage, reduces the waterproof pressure of the roof and reduces the structural load.

3. The number of downpipes is small and the diameter is small, which meets the aesthetic requirements of modern buildings and the rainwater drainage of large-scale landmark buildings, various long-span roofs and high-rise buildings.

4. The system has high safety, and the pipeline direction can be set as required, which can meet the rainwater drainage of modern large-scale shopping malls, supermarkets, factories, warehouses and various metal roofs with grid structures without affecting the building function and use space.

5. Under the design flow, the system has no air vortex, high drainage efficiency and low noise, which can perfectly meet the acoustic requirements of modern cinemas, theaters, convention centers, old libraries, schools and hospitals.

Siphon drain pipe specification

Most siphon drains are hdpe pipes, so the specifications (mm) of siphon drains are usually 20, 25, 32, 40, 50, 63, 75, 90, 1 10, 125, 140,/kloc. In addition, the specifications (mm) of large-diameter siphon drainage pipes are 630, 7 10, 800, 900, 1000, etc. These specifications are usually rare.

Matters needing attention in siphon drainage installation

1, the connection end of the fused connection drain pipe should be cut flat, the connection end face and the axis of the drain pipe should be straight, and the dirt on the connection surface of the drain pipe and pipe fittings should be cleaned up.

2. The connection end of the drain pipe shall be marked according to the penetration length, and the entire outer circumference of the drain pipe joint shall be scraped off. The scraping length should not be less than the symbol specification, and should be marked twice after scraping.

3. Before the normal natural cooling time is reached, the fixture should not be removed, and no external force should be applied to the joint.

4. The welding parameters of electrofusion pipe fittings shall meet the requirements of drainage pipes and pipe fittings manufacturers.

5. After the electric fusion welding joint is connected, it should be visually inspected to meet the following requirements: otherwise, it should be reworked until it is qualified.