NL7905922A - Synthetic ribbed drainage pipes with wrapping - of slag fibres formed into mats or enclosing only rib troughs - Google Patents

Abstract

A wrapping of mineral wool fibre flocks held together by an open net of polyethylene or polypropylene, is used to clad synthetic drainage and irrigation pipes. The pipes have external ribs and holes for the passage of fluid and the cladding may be applied only in the troughs of the undulations or the wrapping may have the form of an actual mat of mineral wool fibres. The problems of bacterial attack of claddings of coconut matting and the expensive as well as the unattractiveness of glass fibres, are overcome. The mineral fibres selected must not have water repellent characteristics, and fibres from metallurgical slag are applied with success.

Description

- 1 - 7950 ^ 9 / vdV / bw

Applicant: ïlavin B.V. in Zwolle.

Title: "Plastic drainage corrugated pipe with fiber wrapping".

The applicant mentions the inventor as B.H. Cook.

The invention relates to a plastic drainage or irrigation corrugated pipe set of openings in the wall for allowing liquid to pass, at least partially wrapped with a wrapping of fiber-like material.

Such a plastic corrugated pipe, with a wrapping of coconut material in the form of a coconut fiber mat, is known. This known plastic corrugated pipe has the drawback that the wrapping consisting of coconut fibers has, over time, less favorable properties due to the growth of microbes on the wrapping made of coconut fiber.

Attempts to avoid such objections of a wrapping from coconut fibers, for example in the form of a coconut fiber mat, have so far been unsuccessful.

On the other hand, plastic corrugated pipes are known in which the grooves are covered with such a plastic corrugated pipe and a ribbon made of glass fibers, but these plastic corrugated pipes have the drawback that their cost price is very high, while in addition such glass fibers are in practice less attractive.

The object of the invention is now to provide a plastic drainage or irrigation corrugated pipe, with openings in the wall for allowing liquid to pass, whereby the aforementioned drawbacks do not occur and in particular a plastic corrugated pipe is obtained with a wrapping of much lower cost price. which, moreover, is not adversely affected over time.

This object is achieved according to the invention in that a plastic drainage or irrigation corrugated pipe with openings in the form for the passage of liquid is at least partly wrapped with a wrapping of a fibrous material, characterized in that the wrapping is made of stone. olvezine material 30 exists.

With particular advantage, the wrapping may consist of

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^ 790 5 9 22 * τ ^ wool fiber material flakes, which are efficiently held together around the plastic corrugated pipe by an open net, which advantageously consists of plastic material, such as a polyethylene net or polypropylene net.

Even more preferred is a wrapping of a mat of rock wool fiber material, since such a mat can be more easily fitted around a plastic corrugated pipe than the said rock wool fiber flakes, whereby an open net must always be present in order to keep the flakes together. When a mat of rock wool fiber material is used, such a plastic net can be omitted or when it is used, it can be applied more easily.

When the plastic drainage or irrigation corrugated pipe is provided with openings in the wall, which are only provided in the corrugated valleys, it may be recommended to carry out the wrapping of the plastic corrugated pipe only in the corrugated valleys of the plastic corrugated pipe.

It should be noted that one should not use stone wool fiber material which has been treated to obtain water-repellent properties as necessary for insulation purposes.

Very advantageously, the rock wool fiber material consists of slag material, such as, for example, obtained in the manufacture of iron, i.e. blast furnace slag and steel, such as steel furnace slag. Of course, one can also use snails from phosphorus ovens.

The invention will now be elucidated on the basis of an exemplary embodiment with the aid of the drawing, in which:

Fig. 1 a longitudinal section of a plastic drainage corrugated pipe with a winding in the corrugated valleys of rock wool fiber material;

Fig. 2 shows a similar wrapping of a plastic drainage corrugated pipe with a network for holding the rock wool fiber material together; and

Fig. 3 shows a plastic drainage corrugated pipe wrapped with a mat of rock wool fiber material,

Fig. 1 shows a plastic corrugated pipe 1 provided with wave crests 2 and wave troughs 3, wherein in the wave troughs 3 there are drainage openings Λ for the passage of water from the environment '] 790 5 9 22 -3 -' * in the tube 1.

In order to prevent the clogging of the drainage openings k quickly, the wave valleys 3 incorporate a ribbon of stone-fiber maberial 5, which guarantees good water permeability 5, but on the other hand does not have a high cost price.

Fig. 2 shows that a rock wool fiber material layer 5 arranged around the entire pipe 1 is used, which rock wool fiber material is held together in the form of rock wool fiber flakes by a polyethylene net 6.

Finally, FIG. 3 shows that the plastic drainage corrugated pipe is wrapped with a mat of rock wool fiber material.

This plastic drainage corrugated pipe has a very long service life, without deterioration in drainage properties and, moreover, a low cost due to the wrapping material used, consisting of inexpensive rock wool fiber material.

The rock wool fiber material preferably consists of slag wool obtained from blast furnace lacquers, steel furnace slalches or phosphorus furnace slags, however, preference is given to hoovoven slags.

t * 790 59 22

Claims (5)

1. Plastic drainage or irrigation corrugated pipe with openings in the wall for the passage of liquid, at least in part. enclosed with a wrap of fibrous material, characterized in that the wrap consists of rock wool fiber material. Plastic drainage or irrigation corrugated pipe according to claim 1, characterized in that the wrapping consists of rock wool fiber material flakes. Plastic drainage or irrigation corrugated pipe according to claim 1 or 2, characterized in that the rock wool fiber material or the rock wool fiber material flakes are held together by an open net. if. Plastic drainage or irrigation corrugated pipe according to claims 1-3, characterized in that the open network consists of a plastic net, preferably polyethylene or a polypropylene net. Plastic drainage or irrigation corrugated pipe according to one or more of the preceding claims, characterized in that the. wrapping is arranged exclusively in the wave valleys. 6. Plastic drainage or irrigation rib touis according to one or more of the preceding claims, characterized in that the wrapping consists of a mat of rock wool fiber material. f ƒ: - t 790 5 9 22