examine the water supply in frame cottage for example. In this example,
the introduction of predpologaetsya cold water.
Internal plumbing system, not only for private cottage on frame technology,
include entries into the building, water gauge assembly, distributing
network, standpipes, connections to the standpipes appliances, water-,
mixing, stop and control valves.
When making a decision - to choose which system should take into account
- the system of internal plumbing is subject to the technical and
economic feasibility, sanitation and fire protection requirements,
as well as the accepted system of outdoor plumbing.
For a frame cottage, cottage are advised to take dead-end system with
the lower wiring internal plumbing of cold water with one input.
In the designed cottage predpologaetsya to make the first floor under
the economic needs, therefore, input, water gauge assembly and pipelines
are located on the first floor.
The main pipelines are laid along the inner wall in 40 - 50 cm above
the floor. Attaching lines carried on brackets or hooks. Trunk pipelines
design with an emphasis 0.002 - 0.005 in the direction of entry for
the descent of water from the water system of the building.
Entering this section of the pipeline running from the city network
to the cottage. Entering try to patch up the shortest path and perpendicular
to the cottage, a place of maximum water riser location. The slope
of the input to the urban water supply 0.002-0.005. Setting the input
is usually mounted pipe made of steel pipes for vodogazoprovoda 20
mm in diameter.
Tube entry, in this example is carried out through the outer wall
of a frame cottage, after performing the preparatory work for the
wire. The horizontal distance in the clear water between inputs and
outlets of drainage networks - at least 1.5 m in diameter and 200
mm input. Clear distance between the vertical pipes at the intersection
of at least 0.4 m
gauge site. Selection of a water meter.
Hydrometer is used to account for the amount of water consumed in
frame cottage. For this set the water meter (water meters).
Hydrometric sites (according to the requirements of SNIP 2.04.01-85
*, p.11) should be set at the outer wall of a cottage in convenient
and easily accessible room with artificial or natural light and air
temperature not below 5 ° C (in our case - the first floor) .
Water meter provides a current permit water flow. Diameter of nominal
bore water meter should be chosen based on the average hourly flow
rate for the period of consumption, which should not exceed operational.
Hourly flow rate = 0.00175 Qttot m3 / h, in frame cottage is determined
by the formula: qutot • u, where:
Qttot = 1000 • 8
qutot - Nome flow, taken on assignment (l / person • day)
u - the number of residents
Accepted water meter: vaned VC - 20
the pressure loss in the counter:
Hb = S • q2 = 5,18 • (0,38) = 0.748 m 2 Where:
S - hydraulic resistance meter (m • s2/l2)
q - the estimated flow rate (l / s)
the pressure drop with acceptable (to water meter vane)
0.5 m Hb 2.5 m.
0.5 m 0.748 2.5 m
Adopted by the diameter of the meter: VC - 20 with the following parameters:
S = 5,18
ekspl.rashod water 2 m3 / h
Determine the total pressure loss in the internal water supply network
Hobsch = He + Hb = 26.9 + 0.75 = 27.65 m.
He - loss of pressure in the internal plumbing (as determined by field
12 Table 1)
HB - head loss in a selected gauge meter /
axonometric scheme of internal water supply network
After addressing the trace water to begin drawing axonometric scheme
of internal plumbing.
Axonometric scheme should include all the elements - the design of
the instrument to the city water wells: water gauge site, enter the
building. The diagram show-pipes, shut-off and relief valves, refer
to the floor marks the basement, first and upper floors, to mark the
entry and land in the place of entry into the building. Bear the number
of settlement sites along the calculated direction, from dictating
the (estimated) of (unit) - usually the most remote and highly placed
- to the place where the input to the city water supply (against the
flow of water).
Axonometric diagram is drawn so that the horizontal pipes along the
drawing sheet, were sent along the lower edge of the leaf, and located
across the drawing sheet (perpendicular to the bottom of the page)
were sent (the scheme) at 45 ° (on the same scale).
Axonometric scheme performed by hydraulic calculation of water supply
Hydraulic calculation of water supply network.
Hydraulic calculation of a water supply system for the selection of
running pipelines and their diameters, to create optimal conditions
for water cottage.
In the calculation take into account: the definition of the estimated
cost, the purpose of pipe diameters taken for installation (steel,
plastic), the definition of head loss in length and the local resistance.
Determining the cost of settlement areas and produce hydraulic calculation
in tabular form.