1
.Brief introduction
Quick Stream
System is a new type drainage system which totally
different from traditional Gravity Drainage
System. The whole system with large-scale composition,
each part links to each other as closely as
water molecule. To ensure the system function
properly, it needs to be guaranteed the water
to flow balance. There for the installation
for the system must compile with the designated
hydraulic software calculation.
With the
rapid development in science and technology
in the past ten years, in construction industry
also face the revolution of the great change
from the idea, technology to materials. People
raise the new requirement to building of its
usability, artistry, scientific. Appear some
big flat roofs, and roofs in various shape and
materials.Obviously, roof drainage system require
for the new technical system which is more effective
and advanced to reach the environment demand.
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2
.The principle of traditional gravity drainage
system
The principle of traditional gravity drainage
system is base on the slope on roofing structure.
rainwater flow into the gully on the roof naturally,
then water mix with air rely on action of gravity
drain off the roof along the stack pipe. The
hydraulic calculation of the whole system rely
on hand calculation, because it’s the flow pattern
of water mix with air, so the calculation in
pipe diameter is enlarged. At the same time
the roof drainage system require for a certain
of slope and restrict by the roof structure,
to make effective drainage have to increase
gullies and stack pipes, a lot of stack pipes
gather those rainwater together and flow into
in the city pipeline system. In China, traditional
gravity drainage system adopt the cast iron
pipe, and the asbestos cement pipe of tin plate,
the gully choose type 65 and type 75, primary
need more manpower in the whole installation.
In a word, the traditional gravity drainage
system consume more materials and manpower,
excavate the ground in large side, its installation
is extremely inconveniently.
3
. Quick Stream System
Quick Stream System is based on the principle
of siphonic full pressure flow, velocity of
flow, pressure of rainwater, etc. They can control
and balanced the Quick Stream System. The system
is make up with gully, pipe (union pipe, suspended
pipe, stack pipe, drainpipe), pipe fittings,
and fixed components. When the water level of
the roof reach the height of the requirement,
gully will obstruct air automatically and make
the drainage pipe be in full flowing pattern.
The system utilize the building height and potential
energy of rainwater, fall to form siphonic function
when rainwater flows into the stack pipe. Under
the function of the negative pressure in the
pipeline, rainwater is discharged to outdoors
for high velocity of flow. |
The principle
of traditional gravity drainage system
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