AGENCEMENT DE DRAINS AGRICOLES

ARRANGEMENT RELATING TO A DRAINAGE PIPE

Abrégé anglais

Abstract of disclosure.
An arrangement relating to a drainage pipe provided with
inlet holes for water, said holes being positioned on
the upper half of the drainage pipe and the drainage
pipe being fully or partly covered by a jacket or ex-
terior plate. The lower edge or edges of the jacket
lies or lie substantially on the same level as the lo-
wer edge portion of the drainage pipe. The jacket may
possibly be smooth, whereas the drainage pipe is
corrugated. The water will then rise in the space bet-
ween the jacket and the pipe, which space serves for
deposition of possible particles, and thereafter will
enter into the pipe through the holes. The arrangement
may be used for simplified disposition of drainage
without particular necessity for draining masses above
the arrangement.
Fig. 8

Revendications

The embodiments of the invention in which an
exclusive property or privilege is claimed are defined
as follows:
1. An arrangement of a drainage pipe and an
exterior part, the drainage pipe being laid with its axis
generally horizontal and being provided with inlet openings
for water to be drained, said openings being in only a half,
which in use will be the upper half, of the pipe, and the
exterior part being located to cover but not close the open
ings of the drainage pipe at a distance from those parts
of the drainage pipe where the openings are located, such
that in use water may rise in the space between the exterior
part and pipe, wherein the exterior part extends downwards
at least to a position which in use is at substantially the
level of the lowermost portion of the drainage pipe, and
wherein, in use, there is an inlet opening or openings
from outside the arrangement in-to said space in the region
of said level of the lowermost portion.
2. The system according to claim 1, wherein the
exterior part is fixed to the drainage pipe by welding.
3. The system according to claim 1 or 2, wherein
the exterior part is fixed to the drainage pipe by snap-
action.
4. The system according to claim 1 or 2, wherein
the drainage pipe has corrugated surface and that the
exterior part has a smooth surface.
5. The system according to claim 1 or 2, wherein
the drainage pipe has a smooth surface and the exterior
part has a corrugated surface.
6. The system according to claim 1 or 2, wherein
both the drainage pipe and the exterior part are corruga-
ted, having different degrees of corrugation.
7. The system according to claim 1, wherein the
exterior part is provided with mutually spaced supporting
means, adapted in form to and facing the drainage pipe.
-5-

8. The system according to claim 1 or 2, wherein
the exterior part in cross-section has substantially
inverted U or V form.
9. The system according to claim 1 or 2, wherein
the drainage pipe and the exterior part are supported on
a filtering mat.
10. The system according to claim 1, wherein the
exterior part is a tube which encompasses the drainage
pipe, the inlet openings being in the lower half of the
exterior part.
11. The system according to claim 10, wherein the
tube has the water inlet openings in the form of a slit
being arranged in the longitudinal direction of the tube.
-6-

Description

~3~
1.~. .
The prese~t invention relates to an arrangement of a drain-
age pipe provided wi-th inlet holes for water.
It is common among drainage pipes that the inlet ~oles for
water may be clogged, and the presen-t invention has an
object by simple means to remedy this disadvantage.
According to the inven-tion the holes are positioned on the
upper half of the drainage pipe, the ~rainage pipe being
fully or partly covered by a jacket or ex-terior plate.
The present invention provides an arrangement of a drainage
pipe and an exterior part, the drainage pipe being laid with
its axis generally horizontal and being provided with inlet
openings for water to be drained, said openings being in
only a half, which in use will be the upper half, of the
pipe, and the exterior part being located to cover but not
close the openings of the drainage pipe at a distance from
those parts of the drainage pipe where the openings are
located, such that in use water may rise in the space be-
tween the exterior part and pipe, wherein the exterior part
extends downwards at least to a position which in use is
at substantially the level of the lowermost portion of the
drainage pipe, and wherein, in use, there is an inlet
opening or openings from outside the arrangement into said
space in the region oE said le-vel Df the lowermost portion.
Further characteristic features will appear from the at-
tached claims and the following description with reference
to the accompanying drawings.
Fiyure 1 shows a first embodiment of the arrangements ac-
cording to the invention.
.

- la~ 369~i
Fiyure 2 shows a second embodiment of the arrangement ac-
cording to the invention.
Figure 3 shows a third embodiment of the arrangement ac-
cording to the invention.
Figure 4 shows a fourth embodiment of the arrangement ac-
cording to the invention.
Figure 5 shows a modification of the embodiment in figure 4.
Figure 6 shows a further modification of the embodiment in
figure 4.
Figure 7 shows a modification of the embodiment in figure 5.
Figure 8 shows a modification of the embodiment in figure 3.
Figure 9 is a perspective view of an exterior plate intended
for use with the arrangement as illustrated in figures 6
and 7.

~83~9~
.
Figure 10 shows an exterior pla-~e according to the invention
for use with the arrangemen-t as shown in f,igure 3.
Fi,gure li shows a fiEth embodiment of the arrangement accor-
ding -to the invention.
Figure 12 is a mod:Lfied embodiment of the arran~ement accor-
ding to figure 11.
In figure 1 -there is shown a drainage pipe 2 which ln the
figure is corrugated and provided wi-th an array of inlet
holes 3. The drainage pipe is covered by an exterior plate
1 extending from base level over the top of the drainaye '
pipe and partly down on the opposi-te side of the drainage
pipe. Between the drainage pipe and the exterior plate there
is in the longitudinal direction a-t the -top arranged a
sealing between the drainage pipe and the plate. There is
thus formed an inle-t section for -the water and an outlet
section for the water consisting of the in-terior of the
pipe 2. In figure 2 there is shown a drainage pipe 2 with
an array of inlet holes 3, where the drainage pipe is com-
pletely covered by an ex-terior plate 5 placed on base level.
It will thereby immediately be seen that there,is :Eormed two
inlet sections and one outle-t section consisting,of the in-
terior of the pipe 2. In the example of figure 2 -the pipe
2 is corrugated.
Figure 3 shows an exterior plate 6 hav:i.ng ~upT?ortirlg rib~ 6',
said supportiny rihs beiny adapted in shape to the arainage
pipe and facing said pipe. There is thus in this case formed
,two inlet sections, i.e. between the plate 6 and the dxainage
pipe on both sides of the drainage pipe.
In sirnilar manner there is in figures ~ and 5 arranged an
ex-terior plate 7 with protruding legs 8 and in figure 5
there is in addition arranged a filtering mat 9 on which
both the exterior pla~e and the drainage pipe are placed.
In the embodiments shown in figures 1 to 5, the drainage pipe
,, is illustrated to be corrugated, whereas the ex-terior pla-te

~3~
has a smoot:h surface. However, the cdrainage pipe may as
well have a smoo-th surface and the exterior plate have a
corruga-ted form, such as indica-ted in the embodiments of
figures 6 and 7. In figure 6 there is shown a drainage pipe
ll with a corruya-ted e~terior plate lO. In the embodiment
of fiyure 7, the unit o:E figure 6 is placed on a filtering
mat 9. The ~i]terincJ mat 9 has as its object to ensure
effective filtering of the incoming water.
In figure 8, the exterior pla-te 12 is snapped over the drainage
pipe 2. In the illustrated form, -the exterior plate is smoo-th
and the pipe is corruga-ted, but this could of course be vice
versa, or both elements being corruya-ted with different degree
of corrugation.
In figures g and 10 there is shown as an example -the exterior
plates used ln the embodimen-ts of figures 5 and 7 and figure
3, respec-tively.
The holes may be made subs-tantially bigger than Eor common
drainage pipes. Because the water -to be drained rises slowly
upwards before it reaches the holes, sand, soil, par-ticles
etc. will be deposited and not en-ter into the clrainage pipe.
~nother considerable advantage of the syste-m consists in that
the earth masses may be put back into the clitch over the
drainage pipes after they with their covering plates or
the like have been placed on common filtering bed, sand,
gravel, sawdust or other material.
In figures ll and 12 there is indicated by arrows how the
drainage water flows into an inlet section of the arrange-
ment and down into a central outlet section of the arranye-
ment.
The arrangement according to fiyures ll and 12 consists of
two parts, where -the first part is made from an internal
pipe 13 with the said inlet openings 16 placed in the upper
half of the pipe. This pipe 13 thus forms the outlet section
.,
of the arrancJement. The o-ther portion consis-t of a pipe or

36~
a ~acke-t 14 surrounding the first par-t and having said openings
in the lower half of the pipe or jacket. As will appear from
figures 11 and 12, there may e.g. be one array of inlet ope-
nings 17 or two arrays of inle-t openings in the lower half
of the jacket, res~ec-tively. ~lternatively said one array
of openings may have the form of a slit arranged in the
longitudinal direction of -the jacket, such as in principle
for the embodiment of figure 8.
As shown in figures 11 and 12 the inner pipe 13 has a smooth
surface, ~7hereas -the outer pipe or jacket 14 has a corrugated
surface, the outer limits of -the corruga-tions being indicated
by the reference numeral 15. Conversely the first part 13
may have corrugated surface and the second par,~t 14 have
smoo-thed surface.
If there is used a jacket provided with said slit, the jacket
may possibly be snapr,ed over the inner tube ]3, such as in-
rlicated as an example in figure 8. Alterna-t:ively the first
part may of course be pushed into the second part.
.. . .
..
...: