EP0040621B1

EP0040621B1 - An arrangement relating to a drainage pipe

Info

Publication number: EP0040621B1
Application number: EP19800902267
Authority: EP
Inventors: Jon Bergsland
Original assignee: Individual
Current assignee: Individual
Priority date: 1979-11-28
Filing date: 1980-11-28
Publication date: 1984-09-19
Also published as: DE3069236D1; WO1981001580A1; FI71807B; NL8020436A; GB2076927A; DK151108C; FI71807C; DK151108B; EP0040621A1; FI812327L; GB2076927B; DK335981A

Abstract

An arrangement related to a drainage pipe (2) provided with inlet holes (3) for water, said holes (3) being positioned on the upper half of the drainage pipe (2) and the drainage pipe being fully or partly covered by a jacket or exterior plate (12). The lower edge or edges of the jacket lies or lie substantially on the same level as the lower edge portion of the drainage pipe. The jacket may possibly be smooth, whereas the drainage pipe (2) is corrugated. The water will then rise in the space between 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.

Description

The present invention relates to an arrangement of a drainage pipe provided with inlet holes for water.
It is common among drainage pipes that the inlet holes for water may be clogged, and the present invention has as an object by simple means to remedy this disadvantage.
The British specification GB-A-267.817 discloses a drainage pipe provided with perforations in its upper part and with a loose cover fitting over the perforations with a space between the pipe and the cover. In the device of the British patent, the lower portion of the cover is not on the same level as the bottom portion of the drainage pipe. One drawback with said device is that there is not provided any sedimentation space and infiltrated water may therefore enter the drainage pipe. This is undesirable since the drainage water then must be further purified at the outlet of the drainage pipe. Further this prior art solution may yield a sedimentation within the pipe, thus causing gradual clogging of the pipe.
The present invention overcomes the above drawbacks and relates to an arrangement of a drainage pipe as defined in claim 1.
In a particular embodiment, the exterior part is fixed to the drainage pipe by welding, adhesion or the like.
Further characteristic features will appear from the attached claims and the following description with reference to the accompanying drawings.

Figure 1 shows a first embodiment of the arrangements according to the invention.
Figure 2 shows a second embodiment of the arrangement according to the invention.
Figure 3 shows a third embodiment of the arrangement according to the invention.
Figure 4 shows a fourth embodiment of the arrangement according 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.
Figure 10 shows an exterior plate according to the invention for use with the arrangement as shown in figure 3.
Figure 11 shows a fifth embodiment of the arrangement according to the invention.
Figure 12 is a modified embodiment of the arrangement according to figure 11.

In figure 1 there is shown a drainage pipe 2 which in the figure is corrugated and provided with 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 drainage pipe and partly down on the opposite side of the drainage pipe. Between the drainage pipe and the exterior plate there is in the longitudinal direction at the top arranged a sealing 4 between the drainage pipe and the plate. There is thus formed an inlet section for the water and an outlet section for the water consisting of the interior 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 completely covered by an exterior plate 5 placed on base level. It will thereby immediately be seen that there is formed two inlet sections and one outlet section consisting of the interior of the pipe 2. In the example of figure 2 the pipe 2 is corrugated.
Figure 3 shows an exterior plate 6 having supporting ribs 6', said supporting ribs being adapted in shape to the drainage pipe and facing said pipe. There is thus in this case formed two inlet sections, i.e. between the plate 6 and the drainage pipe on both sides of the drainage pipe.
In similar manner there is in figures 4 and 5 arranged an exterior plate 7 with protruding legs 8 and in figure 5 there is in addition arranged a filtering mat 9 on which both the exterior plate 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 exterior plate has a smooth surface. However, the drainage pipe may as well have a smooth surface and the exterior plate have a corrugated form, such as indicated in the embodiments of figures 6 and 7. In figure 6 there is shown a drainage pipe 11 with a corrugated exterior plate 10. In the embodiment of figure 7, the unit if figure 6 is placed on a filtering mat 9. The filtering mat 9 has as its object to ensure effective filtering of the incoming water.
In figure 8, the exterior plate 12 is snapped over the drainage pipe 2. In the illustrated form, the exterior plate is smooth and the pipe is corrugated, but this could of course be vice versa, or both elements being corrugated with different degree of corrugation.
In figures 9 and 10 there is shown as an example the exterior plates used in the embodiments of figures 6 and 7 and figure 3, respectively.
The holes may be made substantially bigger than for common drainage pipes. Because the water to be drained rises slowly upwards before it reaches the holes, sand, soil, particles, etc. will be deposited and not enter into the drainage pipe. Another considerable advantage of the system consists in that the earth masses may be put back into the ditch 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 11 and 12 there is indicated by arrows how the drainage water flows into an inlet section of the arrangement and down into a central outlet section of the arrangement.
The arrangement according to figures 11 and 12 consists of two parts, where the first part is made from an internal pipe 13 with the said inlet openings 1 6 placed in the upper half of the pipe. This pipe 13 thus forms the outlet section of the arrangement. The other portion consists of a pipe or a jacket 14 surrounding the first part 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 openings 17 or two arrays of inlet openings in the lower half of the jacket, respectively. Alternatively 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, whereas the outer pipe or jacket 14 has a corrugated surface, the outer limits of the corrugations being indicated by the reference numeral 15. Conversely the first part 13 may have corrugated surface and the second part 14 have smoothed surface.
If there is used a jacket provided with said slit, the jacket may possibly be snapped over the inner tube 13, such as indicated as an example in figure 8. Alternatively the first part may of course be pushed into the second part.

Claims

1. An arrangement of a drainage pipe formed so as to resist the pressure of the soil and provided with inlet holes (3) for the water to be drained, which are located only in the upper half of the drainage pipe (2) and where an exterior part, for example an exterior plate (1), is placed over the holes of the drainage pipe and at a distance from the drainage pipe such that water may rise in the space between the exterior part and pipe, characterized in that the exterior part (1) extends downwardly to the level of the lowermost portion of the drainage pipe (2), thereby locating the inlet or inlets to said space in the region of said level.

2. An arrangement according to claim 1, characterized in that the exterior part is fixed to the drainage pipe by welding, adhesion or the like.

3. An arrangement according to claim 1, characterized in that the exterior part is fixed to the drainage pipe by snap action.

4. An arrangement according to claim 1, characterized in that the drainage pipe has a corrugated surface and that the exterior part has a smooth surface.

5. An arrangement according to claim 1, characterized in that the drainage pipe has a smooth surface and the exterior part has a corrugated surface.

6. An arrangement according to claim 1, characterized in that both the drainage pipe and the exterior part are corrugated, but having different degrees of corrugation.

7. An arrangement according to one of the preceding claims, characterized in that the exterior part (6) is provided with mutually spaced supporting ribs (6') which are facing the drainage pipe.

8. An arrangement according to one of the preceding claims, characterized in that the exterior part (5, 7) has, in cross-section, a substantially inverted U or V form.

9. An arrangement according to claims 1, 3 or 4, characterized in that the exterior part is formed as a tube or a jacket (14) which encompasses the pipe (13) and is provided at or near its lowermost extremity with inlet openings (17).

10. An arrangement according to claim 3, characterized in that said jacket has said inlet openings in the form of a slit arranged in the longitudinal direction of the jacket.