U.S. patent number 3,870,236 [Application Number 05/341,219] was granted by the patent office on 1975-03-11 for dripping irrigation tubing.
Invention is credited to Jaime Sahagun-Barragan.
United States Patent |
3,870,236 |
Sahagun-Barragan |
March 11, 1975 |
DRIPPING IRRIGATION TUBING
Abstract
A dripping irrigation tubing comprising a pipe line with a
channel member firmly attached all along the pipe line, said
channel member having bottom and side walls and being interiorly
closed at predetermined lengths constituting independent channel
member; said line having bores spaced at periodic distances along
its length, each of said bores communicating with a channel member
entrance constituted by an admission chamber for irrigation liquid
from the pipe line having a reduced height regarding the internal
height of the rest of the channel member so as to provide a filter
for particles of certain thickness, said channel member including a
plurality of alternated internal walls promoting a plurality of
impingements and changes in direction of the fluid that passes
through the channel lowering its pressure before the fluid leaves
the channel through an outlet bore.
Inventors: |
Sahagun-Barragan; Jaime
(Zamora, Michoacan, MX) |
Family
ID: |
23336689 |
Appl.
No.: |
05/341,219 |
Filed: |
March 14, 1973 |
Current U.S.
Class: |
239/542; 138/42;
405/48; 285/13 |
Current CPC
Class: |
A01G
25/02 (20130101); Y02A 40/22 (20180101) |
Current International
Class: |
A01G
25/02 (20060101); B05b 015/00 () |
Field of
Search: |
;138/42,40,105,111,178
;61/12-13,10-11 ;239/547,450,542 ;285/13,14 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Queisser; Richard C.
Assistant Examiner: Yasich; Daniel M.
Attorney, Agent or Firm: Ladas, Parry, Von Gehr, Goldsmith
& Deschamps
Claims
I claim:
1. A dripping irrigation tubing for distributing irrigation liquid,
comprising a pipe line having a plurality of spaced perforations
along its length through which irrigation liquid under pressure
emerges from the pipe line, and a one piece depressurizing channel
member outside the pipe line covering said perforations and
extending partly around the external circumference of said pipe
line, said channel member having a curved bottom wall corresponding
to the pipe line wall curvature and side walls of uniform height
extending around the edges of said bottom wall, said side walls
being firmly attached to the outside of the pipe line wall to space
the channel member from the pipe line, a plurality of cross walls
being provided projecting alternately from each of said side walls
and of the same height as said side walls and engaging with the
outside of the pipe line wall but not reaching the opposite side
wall and arranged to form passages providing a plurality of
obstacles to liquid flow, and reception chambers for incoming
liquid being provided in said channel member located respectively
under each pipe line perforation and of less height than said side
walls thereby filtering out large particles from the incoming
liquid, and including a plurality of spaced outlet holes in said
channel member at a preselected distance between said reception
chambers along its length to distribute liquid at a predetermined
lowered pressure after passing through said passages.
2. A dripping irrigation tubing for distributing irrigation liquid,
comprising a pipe line, and a one piece depressurizing channel
member inside the pipe line having a plurality of spaced
perforations along its length through which incoming irrigation
liquid from the pipe line under pressure emerges into the channel
member, said depressurizing channel member extending partly around
the internal circumference of said pipe line, said channel member
having a curved bottom wall corresponding to the pipe line wall
curvature and side walls of uniform height extending round the
edges of said bottom wall, said side walls being firmly attached to
the inside of the pipe walls to space the channel member from the
pipe line, a plurality of cross walls being provided projecting
alternately from each of said side walls and of the same height as
said side walls and engaging with the inside of the pipe line wall
but not reaching the opposite side wall and arranged to form
passages providing a plurality of obstacles to liquid flow, and
reception chambers for the incoming liquid being provided in said
channel member located respectively under each channel member
perforation and of less height than said side walls thereby
filtering out large particles from the incoming liquid, and
including a plurality of spaced outlet holes in said pipe line at a
preselected distance between said reception chambers along its
length to distribute liquid at a predetermined lowered pressure
after passing through said passages.
Description
BACKGROUND OF THE INVENTION
In the known dripping irrigation systems consisting of applying the
irrigation fluid in a controlled manner near the plants, in order
to preserve in same the moisture necessary for its growth with a
minimum consumption of liquid, use has been made of tubing laid
along the rows of plants and including perforations along the
tubing, spaced at periodic distances, with or without drippers
engaged in these perforations.
These systems have proven to be economically undesirable, specially
for furrow crops in which the amount per hectare might be up to
100,000 or more in which the application of drippers would be
arduous and costly and the lacking of application of same would
promote a non-controlled irrigation and substantially without the
typical characteristics of the dripping irrigation system.
SUMMARY OF THE INVENTION
This invention relates to a new dripping irrigation tubing
including all along a main pipe line, a channel member attached
thereto having a plurality of integral alternated walls
constituting a liquid passage having a plurality of obstacles
promoting a depressurization in the irrigating liquid when the it
changes directions a great number of times before allowing exit of
same through an outlet bore located at the end of the passage or in
any other desired location. The pipe line communicates through a
hole with the channel member, generally at the beginning of same
and by means of a chamber having a reduced height as regards the
height of the rest of the channel member, in such a manner that, in
turn, prevents the passage of bodies of a given thickness that
might occlude the passage, that is, it acts like a filter for the
passage of harmful elements. The passage has a given length that is
continuously repeated all along the tubing.
The number of alternate walls promoting the changes in the
direction of the flow could be multiple, thereby obtaining
different and better results depending on the number of the changes
of direction that are imparted to the liquid in the least possible
length. The walls may be comprised merely of a straight plates or
else by a set of teeth tapered at its upper end and alternated to
allow a change in the direction of the flow. The main pipe would be
a semirigid cylindrical pipe or merely a pipe made up by a laminar
strip of flexible film sealed at its side edges to a wall of which
the channel member is attached all along or else the laminar film
could include the pressure reduction channel stamped in a
longitudinal enlargement thereof, said stamped channel member being
thereafter covered by a laminar film, all along its length.
These and other objects obtained by the practice of this invention
will be better understood and appreciated reading the following
description that makes reference to the attached drawings of the
preferred embodiments of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1, is a side elevational view of the dripping irrigation
tubing of this invention with details in section illustrating the
pressure reduction continuous channel member attached all along the
length of a pipe line.
FIG. 2, is a plan view of the tubing illustrated in FIG. 1, with a
lengthwise section at 2--2.
FIG. 3, is a view similar to that of FIG. 2, illustrating an
embodiment of the invention in which the channel member, instead of
being constituted of alternate straight walls, is constituted of a
plurality of alternate teeth or elements tapered at their upper
ends, forming the obstacles for the fluid passage.
FIG. 4, is a plan view of the passage, similar to FIGS. 2 and 3,
illustrating an embodiment of the alternate walls to multiply the
length of the passage.
FIG. 5, is a cross sectional view of an embodiment of the dripping
irrigation tubing of this invention in which the main pipe line is
manufactured of two strips of flexible film, sealed or joined by
its side edges with the channel member attached to the exterior of
the pipe.
FIG. 6, is a cross sectional view similar to that of FIG. 5, with
the difference that the channel member is attached to the interior
of the pipe.
FIG. 7, is a cross sectional view similar to that of FIGS. 5 and 6
in which the pipe is comprised of a single strip of flexible film
folded at its middle and joined or sealed at its side edges with
the channel member attached to the exterior of the pipe.
FIG. 8, is a view similar to that of FIG. 7 with the difference
that the channel member is attached to the interior of the
pipe.
FIG. 9, is a cross sectional view of the tubing for dripping
irrigation of this invention.
FIG. 10, is a fragmentary conventional perspective view of an
embodiment of the invention, in which the pipe line comprises a
strip of a flexible film folded and joined at its side edges
including the channel member attached at the exterior thereof.
FIG. 11, is a cross sectional view of an embodiment of the
invention in which the pipe is comprised of a strip of flexible
film having an enlargement all along the length of same in which
the channel member with the flow passage has been engraved or
stamped, same being merely covered by a film all along the length
of the pipe that is formed when joining the side edges of the strip
of the extended film shown in the figure.
FIG. 12, is a cross sectional view of the tubing embodiment shown
in FIG. 11 of the invention, once the side edges of the film have
been joined to constitute the tubing with the channel member
attached to the exterior thereof.
FIG. 13, is a view similar to that of FIG. 11, but inverted.
FIG. 14, is a view similar to that of FIG. 12 with the difference
that on joining the ends of the film for forming the tubing, the
channel member is located inside thereof.
DETAILED DESCRIPTION OF THE INVENTION
The tubing for dripping irrigation of the present invention is made
up by a main pipe line 11, having attached all along its length a
channel member 12, said channel including a plurality of walls 13,
integrally attached to the bottom and each of the side walls of the
channel member in an alternate manner, forming a fluid passage 14,
with a plurality of obstacles, promoting the impingement of the
irrigation fluid a great number of times, thereby causing a
substantial reduction in its pressure; the continuous channel
member 12 includes a first liquid reception chamber 15, registering
with a perforation 16, of pipe 11; this reception chamber 15 of the
channel member has a reduced height as regards the normal height of
the rest of the interior of the channel member, thereby acting as a
filter to avoid the passage of certain particles that subsequently
occlude the passage of the liquid inside channel member 12. Said
liquid, once having lost a given pressure, flows out through a hole
17 of channel member 12 that is generally located at the end of the
liquid passage.
In FIGS. 1 and 2, the interior of the channel member is clearly
shown, and the passage of the liquid from the pipe through the
passage and to the exterior thereof is indicated with arrows.
On the other hand, an embodiment of the invention is shown in FIG.
3 with a modified channel member 12, in which instead of the
straight walls 13, a plurality of teeth 18 or bodies tapered
upwards are included, and these could end in a point and they are
attached to each of the side walls 19 of channel member 12,
alternately, promoting a plurality of obstacles in the flow of the
fluid passing from the inlet hole 16 to the outlet hole 17. This
embodiment is advantageous when using, in the manufacture of the
pressure reduction channel member 12 attached to the pipe, a pair
of gears that automatically produce in semiplastic material,
through a stamping operation, the aforementioned teeth 18.
In FIG. 4, an additional embodiment is shown with a modified
channel member 12 in which the inlet hole 16 of pipe 11 opening to
channel 12 is located in the central portion of each of the
depressurization lengths, and same may include an arrangement of
alternate multiple walls, including, for example a lengthwise
central wall 20, with a plurality of cross walls 21, spaced
parallel, alternating with walls 22 attached to the bottom and each
of the side walls 19. In this embodiment of the invention, the
outlet hole of said channel 12 is illustrated in dotted lines 23,
same being near the inlet hole 16 and this embodiment substantially
doubles the size of the passage.
With the above mentioned embodiment, other more desirable
embodiments can be obtained that increase the number of impacts and
changes in the least possible space. In the embodiments shown in
FIGS. 5-10, the channel member is indicated by 12'" and the
interior thereof may have any of the forms described with reference
to preceding FIGS. 1-4.
In the embodiment illustrated in FIG. 5, it can be seen that the
main pipe can be constituted by a pair of strips of a flexible film
24, sealed or joined at its side edges 25. Once the liquid is
introduced into the tubing, same will adopt its normal cylindrical
shape. This type of flexible pipes that can be employed with the
present invention allow easier winding of same for transportation
or storage, as well as facilitates the attachment of the channel
member 12 on same. In the embodiment shown in FIG. 5, channel 12 is
joined at the exterior to one of the films 24 and in contrast, in
FIG. 6, channel 12 is attached to the interior of one of the films
24.
In FIGS. 7 and 8 is shown an embodiment of the pipe line contituted
of a single strip of film 26 sealed at its ends 27 with the channel
member 12 attached either to the exterior (FIG. 7) or to the
interior (FIG. 8) of the pipe. In the further embodiments shown in
FIGS. 11 to 14 the pipe line is made of a strip of thin film 28 the
ends 31 of which are overlapped. The channel member is indicated by
12.sup.iv and the interior thereof may have any of the forms
described with reference to preceding FIGS. 1-4. However the
channel member 12.sup.iv instead of being attached to the pipe line
is formed integrally as an enlargement 29 of film strip 28 having a
curved bottom wall and side walls of uniform height. The channel
member 12.sup.iv is closed by a film strip 30 firmly attached to
the pipe line wall adjacent the side walls of the enlargement.
The side edges 31 of this strip of film can be joined either to one
side of the channel member 12, as illustrated in FIG. 12, or to the
other side as illustrated in FIG. 14, with the result that the
depressurization channel member 12 will be located outside the pipe
or inside the pipe, respectively.
All final embodiments are merely illustrative of the fact that any
change or amendment in the form and detail must be embodied within
the spirit and scope of the invention, such as the shape of the
passage for reducing the fluid pressure or else the kind of fluid
feeding pipe employed.
* * * * *