DE7137887U - Flexible drain pipe - Google Patents

Description

EJUH. Naue KGr Espelkamp, the *, 8,1971

New, flexible drain pipe

The task of a drain pipe is the quick discharge of surface water into a Sasarsler or Stream. In order to be able to fulfill this task, the outer skin must therefore be as porous as possible without the fine ones To let earth particles get into the pipe interior. The more passages there are, the faster it can be the surface water run off. On the other hand, these openings must be smaller than the fine earth particles

A second requirement is an endless length of the pipes with a high degree of flexibility in order to make laying so simple and easy to make cheap as possible

The third requirement concerns stability. It must be so large that it can be stressed by agricultural machinery Do not permanently deform the pipe at a depth of 4o to 5o cm or destroy, temporary deformations being desirable to loosen the soil around the pipe.

Last but not least, a drain pipe must be inexpensive if it is to be used in large quantities.

The drainpipes used up to now do not fulfill these four tasks or only very inadequately.

The clay pipes used in the past had a high percentage of breakage during transport and installation ;; laying the short pieces was not efficient. Breaks in the ground were uncontrollable. The water entry is $ 93> via the ÖT; öBfexe \ LlSn? S? E were too big and left

a lot of earth particles penetrate and settle in the pipe.

The plastic tubing that has become popular in recent years had to be cross-ribbed in order to be sufficiently stable and be punched. The holes are too few and too big.

Drainpipes have also become known that have a sieve-like fabric as a jacket, which with a Support core is attached by synthetic resin impregnation (Gbm. 7 o17 532).

The laid-open specification 2 008 351 describes a

coiled tube made of foamed plastic material, which

successively tangential between two carrier layers, of which at least one layer is still flowable, foamable plastic compound carries.

Such pipes are not sufficiently water-permeable, since it is known that they are not fully reacted synthetic foam collapses forming a film; when it is under pressure or collides with a boundary surface. Such Hoses have to be perforated again afterwards and have very little stability. If you use for Increased stability of rigid foam, only closed cells are formed that do not allow water to pass through,

The Gbm 7 o2o 888 describes a filter pipe for wells, in which the pipe is made of plastic reinforced with glass fibers exists, the inkchsächtung should form the filter slots by the distances to be observed during the fastening and the tubular shape to be formed by a core made of non-impregnated fiberglass rows, which in turn are glued on are based on a stiff, self-supporting core, which is also made of glass fibers impregnated with synthetic resin target·

713 788 710 2.72 _ _{3 Λ}

• ·

Such a filter pipe is unsuitable as a drain pipe because it is eteif, does not allow sufficient water to penetrate and has no space inside to drain off any water that may have entered. In addition, fiberglass is unsuitable for you such purpose as it is not water resistant.

The Offenlegungsschrift 1 9o2 453 has the production of flexible drain pipes made of plastic to the subject, which are characterized in that a plastic profile is preferably made of polyethylene wound into a spiral, with capillary wicks inserted between the walls which are welded to the plastic profile should.

Apart from the high work and material costs Experience has shown that the welding between polyolefin foam or profiles with other materials is extraordinary problematic. The required welding pressure condenses capillary wicks in such a way that there is sufficient water drainage can no longer be spoken.

The same must be said of the laid-open specification 1.9oo.193. Also the older Offenlegungsschrift 1,814,841 cannot be a solution to the problem, as polyolefin threads do not work well with glass thread or fiber enter.

One cannot speak of a weld at all, while a bond between glass threads and Polyolefins are not a resilient compound.

The Gbm 7.oo7.o32 describes a drainage pipe made up of three Elements: a corrugated plastic pipe with slots is provided, a Hygromull filter bar differences Licher grain that is placed around the drainage pipe with an outer coating made of a layer of mushroom or another, water-permeable fabric. Everything is then again surrounded by buckets tttfläe <f & d £ n-in the regular lay.

This expenditure of material and labor makes the drainage pipe so expensive that it no longer has any economic value

Also that disclosed in the Offenlegungsschrift 1.6o9.o34 The structure of the filter pipe is so expensive that it cannot be used as a »drainage pipe.

To the four demands that are made of a drain pipe be, namely

1. high water flow rate

2. endless lengths

3 · high pressure resistance 4. good value for money

meet su; According to the invention, an eMsbose spiral 1 made of hard plastic with a jacket is proposed To surround filter material 2 made of chemical threads, this jacket in the longitudinal direction of the spiral around this overlapping according to Fig. 1 or with a welding or Hähstuß according to Fig. or as two half-shells according to Fig. 4 as overlapping Winding according to FIGS. 3 and 3 'can be placed around the spiral.

The filter fabric consists of crimped man-made fibers laid into a tangled pile, which are produced according to Gbm 6.922.o53 and 7.Ο29.284 are needled through a weave fabric (2a) to form loops. This filter material has a very high water permeability with absolute retention of solid parts can be manufactured endlessly and is inexpensive. The plastic spiral 1 is sufficiently pressure-resistant, but still so flexible, so that it can give in to an overpressure from the outside to a limited extent in order to return to its original position as soon as the Overpressure ceases.

This fulfills all the requirements that a good and economical drainage pipe can be provided.

Claims (2)

Protection claims 1. Flexible "drainage pipe with high water permeability and high filter effect, characterized in that around a load-bearing Kimststoff spiral (O a filter mat made of chemical fibers according to Gbm. 6.922" o53 and? -029 * 284 in the longitudinal direction (according to Fig. 1.2.4 ) or as an overlapping roll (according to Fig. 3): .- ~~ ■ is attached with one or two shells. 2. Drainage pipe according to claim 1, characterized in that that the joints (1b, 3b) of the filter mat U) overlapped welded, sewn or waterproof, are stuck (Fig. 1 and 3a). 3 · Drainage pipe according to claim 1, characterized in that the joints are welded with overhang (2a, 4a), sewn or glued waterproof (Fig. 2 and 4)