Note: Descriptions are shown in the official language in which they were submitted.
~99~13
This invention relates to the waste water out-
let sanitary plants comprising a siphon forming a water seal
to which is connected a waste pipe for connection with
sewers. As it is well known, a permanent water seal in si-
phons of sanitary equipments is one of the basic requiTements
for normal operation of a waste water outlet plant.
~ In a waste outlet system, siphons undergo
several influences the consequences of which may be flowing
of water from the apparatus itself by negative pressure in
the connecting line or sucking caused by flowing of water
coming from other devices.
The invention has for its object principally
to avoid lost of water in the siphons and also to obtain
improved hydraulic conditions.
With this object in view, the plant accor-
ding to the present invention is essentially characterised
~k
by the fae-t that with a cylindrical container in which is
dipping a pipe or other e~uivalent element connected to an
apparatus such as a sink, a basin, ete. or waste outlet with
formation of a wa-ter seal into the container, there is
combined an automatie valve system for a peripheral air
inlet, the whole acting so as to fulfil several funetions
which will be enumerated hereafter.
The accompanying drawings (figures 1 to 3) show as
non limitating examples how the invention can be put into
praetiee.
In Figure 1, there is represented a siphon ~ormed
of a eylindrieal body having two parts 11 and 12 eonnected
with one another by serewing at 2 and to whieh is connected
a pipe 3 in relation with the sewers.
In said eylindrical body with water seal 6 a pipe 4
is dipping and is conneeted to a waste outlet apparatus 5
(sink, basin, ete.).
At its upper end the valve body has a eonstrietion
in the form of a Venturi made of a frusto-eonieal neek 7
ending with a lip 8 for eooperating with a cover 9 to form an
air inlet through a peripheral entry duct 10 which ean be shut
off by an annular valve 11. The latter is loeated at the
exterior of the frusto-conieal neck and rests on a seat
formed by the lip 8 and by a lip 12 provided on the inner
periphery of the eover.
A deviee of that kind is deseribed and protected
as sueh in a separate patent applieation filed simultaneously
with the present patent applieation; this copending appli-
eation filed by applicant on Aug. 31, 1978 bears S.N. 310,38~.
When a negative pressure occurs ln the
waste outlet pipe 3 for example as a result of a dralnlng,
the valve 11 is lifted so that fresh air can penetrate
into the pipe 3 via the duct 10 ~figure lA). When the
pressure is equilibrated or when there is an overpressure,
the duct 10 is shut-off by the valve 11 so that contami-
nated air is prevented from escaping.
There i5 thus provided an apparatus in
which the automatic valve device 11 and a siphon are
combined~in one single apparatus so that their functions
are complementary to one another.
In such an assembly, when a negative pressure
occurs, sucking of the water seal 6 formed by the siphon
is prevented.
The water can nevex rise above the level N
corresponding to the upper part of the outlet 3, for
example upon jamming, by reason of the presence of an
air cushion in the cover 9 and this even if the level is
higher in the pipe 4 (level L).
On the other hand, an important point is
that the flow of water and the flow of air are separate
and independent in such a manner the water can flow through
the whole cross section of the pipes 3 and that in view
of the~absence of an air core so that, the sizes of the
pipes in relation with the sewers may be reduced and the
hydraulic conditions and yield are improved.
Such an assembly therefore fulfil simulta~
neously a plurality of functions :
1) maintenance of the water seal ;
2) water flow throughout the whole cross- :
section of the duct and flow of the air in an intermittent
way ;
- 3 -
L83
3) contaminated air is prevented from
escaping in inhabited places.
The height of the water seal 6 which nor~
mally is of 50 mm can be reduced since the valve 11 takes
over the negative pressure (figure lA). However care is
to be taken that the level remains such that it permits
the creation of a water column in the tube 4 sufficient
in case of overpressure (figure lB).
Thus the height of the whole pla~tmay be
reduced.
Figure 2 represents the application of the
invention to an outlet or grid for discharging waste water.
On figure 2 there is represented at 13 a
floor, a sub-basement or an arch having a hole which
receives a grid 14 being part of waste water outlet via
a pipe 15.
Said device comprises a vessel or container
16 in which a removable basket 17 is dipping and which
receives the waste water entering through the grid 14 while
forming therein a hydraulic seal or closure 18.
Xn accordance with the invention, there
is provided above the container or vessel 16 a valve 19
in the form of a ring cooperating with a seat made of O
a) a lip 20 formed by a fold 21 at the top
part of the basket 17 ;
b) a lip 22 formed by a part 23 fixed beneath
the sub-basement or arch 13.
Under these circumstances, when a negative
pressure occurs in the waste outlet pipe 15 for
example upon draining, the valve 19 is lifted so that
fresh air can penetrate into the pipe 15 through the grid
14 and the gap 24 between the basket 17 and the periphery
_ ~ _
33
of the hole formed by the sub-basement 13~
When the pressure is equilibrated or when
there is overpres~ure, the valve 19 is in shut-off position
so that contamined air is prevented from escaping.
The correct operation of tha valve 19 can
not be prevented because if the waterrises in the vessel 16
there is always an air cushion around the valve 19 so
that the valve cannot be forced back by the water.
An important advantage is that the vessel
16 containing the water seal can be constructed with a
very low height (for example less than 100 mm) which is
very important since arches and sub-basements may be made
in a more economical way.
Figure 3 shows a plant for ha~itations in
which a series of waste outlets 25 of the kind illustrated
in figure 2 are provided at the height of different floors
or sub-basements 131t 132, etc~
A pipe 26 is connected to each of these
devices 25 for connection with the waste water pipe 27.
The pipes 26 are connected with the pipe 27
through a vent pipe 28 provided with a fan 29 having an
outlet 30 for delivering the waste air tothe exterior.
With the pipe 28 there may be connected
pipes 31 which in their turn are connected with siphons
32 of the kind illustrated in figure 1 and with devices
3 such as sinks, etc.
be
It will/understood that the fan 29 when
in operation may act to create a negative pressure in all
.of the pipes 26-31 and lift the different valves which
correspond to each outlet 25 or apparatus 33. A waste
air outlet can thus occur, through the pipe 28 at 30,
while keeping the water seal 6 or 18 in all of the devices
without it being sucked away.
9~3
In that way the whole building may be ,
ventilated through the waste water pipes and waste air 1.
outlet pi.pes are no longer needed.
'
`
.
