WO1981001579A1

WO1981001579A1 - An arrangement relating to a drainage pipe

Info

Publication number: WO1981001579A1
Application number: PCT/NO1980/000039
Authority: WO
Inventors: J Bergsland
Original assignee: J Bergsland
Priority date: 1979-11-28
Filing date: 1980-11-28
Publication date: 1981-06-11
Also published as: NO150009B; NO150009C; NO793873L

Abstract

An arrangement relating to a drainage pipe (1) having inlet holes (2) for water and a separation wall (3) between an inlet and an outlet section of the pipe, the inlet section of the pipe having an array of said holes (2) in one half of the lower portion of the pipe. A portion of the separation wall has also an array of holes (4), said portion being horizontal or vertical. The drainage pipe can be made from a single folded and joined plate with said holes made in the plate before the pipe forming process. Alternatively the pipe is made through a process of extrusion, said holes being made thereafter by a rectilinear work operation.

Description

An Arrangement Relating to a Drainage Pipe.

The present invention relates to an arrangement of a drainage pipe provided with inlet holes, for. wate -

The characteristic features of the invention will appear from the attached claims and from the following description^* with reference to the attached drawing.

In figure 1 there is shown a drainage pipe 1 made on basis of a single planar plate which at respective longitudinal side edges is provided with holes 2 , 4. To form a separation wall 3 between an inlet..-.and outlet section of"the pipe, a portion of the plate, in the example shown, is folded twice for thereby to provide a vertical separation wall portion and horizontal separation wall portion, the free edge of the horizontal separation wall portion being adjacent the inner wall of the pipe 1. The side edge with the array of holes 2 is fixed, e.g. by welding, adhesive or the like to the remaining portion of the folded plate approximately where the vertical separation wall portion is commencing.

Drainage water will enter through the array of holes 2 and gradually _.rise in the inlet section being limited by the portion of the pipe wall 1 containing the said holes and the separation wall 3. When the inlet section is overfilled, the drainage water will flow out through the array of holes 4 and down into the outlet section, which on figure 1 to the right is limited by the separation wall and to the left is limited by the pipe wall 1. The horizontal portion of the separation wall 3 simultaneously serves to stiffen the separation wall when it is subjected to water pressure in the outlet section.

Figures 2 and 3 illustrate modifications of the embodiment according to figure 1.

Figure 3 is the emodiment which is closest to the embodiment of figure 1. The functioning is here identical to that just described in connection with figure 1, but the drainage pipe of figure 3 is in contrast to the drainag

figure 1 extruded. The arrangement of the holes 2 and 4 takes place through a rectilinear work operation by drilling first through the wall of the pipe and thereafter through the hό-r rizontal separation wall portion to provide the holes 2 and 4, respectively, as indicated by the arrow. In the alter¬ native embodiment of figure 2, which also illustrates an extruded drainage pipe, the said separation wall is denoted by reference numeral 6 and extends diagonally between the opposite walls of the pipe. As indicated by the arrow, there is first drilled from the outside a hole 2 and thereafter in a straight line a hole 5 for thereby to provide a passage between the inlet section of the pipe and the outlet section of the pipe. It is -thereby obtained in an effective manner a drainage pipe with separation walls, where the array of holes 2,.4 and 2, 5 respectively is very simple to arrange simultaneously with the consumption of material being kept at a minimum.

Claims

C i: a i m s

1. An arrangement of a drainage pipe provided with inlet holes for water, characterized in that the pipe is provided with a separation wall (3) between a inlet and .an outlet section of the pipe, that the inlet section of the pipe is provided with an array of said holes (2) in one half of the lower portion of the pipe (1) , and that in a portion of the separation wall there is arranged an array of holes (4; 5), said portion preferably being horizontal or vertical.

2. An arrangement according to ^'claim 1, characterized in that the drainage pipe is made from a single, folded and joined plate, .the plate before the pipe manufacturing exhi¬ biting arrays of holes (2, 4) along the longitudinal side edges of the plate.

3. An arrangement according to claim 1, characterized in that the drainage pipe is unitarily made by extrusion with two and two of the holes (2) of the inlet section and the holes (4; 5) in the said separation wall portion, respectively being aligned with a substantially similar diameter relative to a common axis and made by a rectilinear work operation.