DE20023604U1 - Hose for carrying media comprises inner and outer layers of elastomer material bracketing a load-carrying element, and a wear resistant foil strip helically wound onto the outer layer of elastomer material - Google Patents

Abstract

The hose (1) for carrying media comprises an inner layer of elastomer material, a load-carrying element of fibers running at an angle to the hose axis (X), an outer layer of elastomer material and a helically wound wear resistant foil strip (7) with a diffusion zone (8) left between adjacent strips.

Description

The Innovation concerns a delivery hose.

A delivery hose is a multilayer structure with the following basic structure. Between an inner layer (core) and outer layer (ceiling), both made of an elastomeric material, a strength member is embedded. The strength element is formed from threads which extend at an angle α to the tube axis. These threads are made in particular of textile materials and are also usually arranged crossed to each other. In this regard, reference is made in particular to German laid-open specification DE-A-33 33 522 ( 2 ).

For the purpose of Preventing the abrasion of the outer layer of delivery hoses, in particular in use cases, where the hoses rubbing each other by permanent movement is already suggested been such hoses with an additional Protective layer (abrasion protection) to be provided on the outer layer is applied.

The The object of the innovation is now to provide a protective layer, at the gaseous media components from the inside to the outside can diffuse through. Furthermore, the length change must the hose at operating pressure be such that the protective layer only very minimal stretched and thus as tension-free on the surface the hose is lying.

According to claim 1, this object is achieved that the protective layer is a foil strip made of abrasion-resistant material that's on the outside layer is applied and runs at a width a helical and under formation a distance b from turn to turn for the diffusion zone.

Advantageous embodiments of the new delivery hose are in the claims 2 to 15 called.

The Innovation will now be with reference to an embodiment with reference explained on schematic drawings. Show it:

1 a multi-layer hose construction;

2 a helical course of the film strip.

1

delivery hose

2

inner layer

3

first reinforcement with thread angle α ₁

4

spiral (Spring steel wire helix)

5

second reinforcement with thread angle α ₂

6

outer layer

7

helical foil strip with width a and distance b

8th

diffusion zone

X

hose axis

• – eine Innenschicht 2 aus elastomerem Werkstoff;
• – einen eingebetteten ersten Festigkeitsträger 3, der aus Fäden gebildet ist, die in einem Winkel α₁ zur Schlauchachse X verlaufen;
• – einen eingebetteten zweiten Festigkeitsträger 5, der ebenfalls aus Fäden gebildet ist, die in einem Winkel α₂ zur Schlauchachse X verlaufen;
• – wenigstens eine Spirale 4, die zwischen dem ersten und zweiten Festigkeitsträger angeordnet ist;
• – eine Außenschicht 6 aus elastomerem Werkstoff sowie
• – einen Folienstreifen 7 aus abriebfestem Werkstoff, der auf der Außenschicht 6 aufgebracht ist und bei einer Breite a wendelförmig verläuft, und zwar unter Bildung eines Abstandes b von Windung zu Windung für die Diffusionszone 8.

To 1 and 2 includes the delivery hose 1 following layer structure:

• - an inner layer 2 made of elastomeric material;
• - an embedded first strength member 3 formed by threads running at an angle α ₁ to the tube axis X;
• - An embedded second strength element 5 which is also formed of threads which extend at an angle α ₂ to the tube axis X;
• - at least one spiral 4 disposed between the first and second strength members;
• - an outer layer 6 made of elastomeric material as well
• - a foil strip 7 made of abrasion-resistant material, on the outer layer 6 is applied and extends at a width a helical, and to form a distance b from turn to turn for the diffusion zone 8th ,

The film strip consists in particular of a UHMwPE (Ultra High Molecular Weight Poly ethylene terephthalate) film. For this purpose, the short form UPE film is often used. It is black and also has a high level of UV protection and is anti-static.

Regarding the width a of the foil strip, the distance b from turn to Winding as well as the film thickness are expediently the following parameters:

What the thread angle α ₁ and α _{2 of} the first strength member 3 respectively. 5 is concerned, the following angle parameters, namely with respect to the tube axis X, are advantageous:
α ₁ , α ₂ 40 ° to <54 °, in particular 45 °

With these angular ranges, in particular with the angle of 45 °, it is achieved that the film strip 7 on the outer layer 6 tension-free rests and is exposed only to a minimum strain. This allows the film strip to take on the task of abrasion protection in an optimal way.

The spiral 4 is in particular a spring steel wire spiral.

The inner layer 2 and outer layer 6 are preferably made of an ethylene-propylene-diene copolymer (EPDM) or its blends.

Claims (15)

Delivery hose ( 1 ), comprising at least: - an inner layer ( 2 ) made of elastomeric material; - an embedded strength element ( 3 . 5 ) formed by threads extending at an angle (α) to the tube axis (X); - an outer layer ( 6 ) of elastomeric material and - a film strip ( 7 ) made of abrasion-resistant material, which on the outer layer ( 6 ) is wound and extends at a width (a) helical, with the formation of a distance (b) from turn to turn for the diffusion zone ( 8th ). Delivery hose ( 1 ) according to claim 1, comprising: - an inner layer ( 2 ) made of elastomeric material; - an embedded first strength element ( 3 ) formed of threads extending at an angle (α ₁ ) to the tube axis (X); An embedded second strength member ( 5 ), which is also formed of threads which extend at an angle (α ₂ ) to the tube axis (X); - at least one spiral ( 4 ) disposed between the first and second strength members; - an outer layer ( 6 ) of elastomeric material and - a film strip ( 7 ) made of abrasion-resistant material, which on the outer layer ( 6 ) is wound and extends at a width (a) helical, with the formation of a distance (b) from turn to turn for the diffusion zone ( 8th ). Delivery hose according to claim 1 or 2, characterized in that the film strip ( 7 ) consists of a UHMwPE foil. Conveying hose according to one of claims 1 to 3, characterized in that the film strip ( 7 ) is black. Conveying hose according to one of claims 1 to 4, characterized in that the width (a) of the film strip ( 7 ) Is 50 mm to 100 mm. Delivery hose according to claim 5, characterized in that the width (a) of the film strip ( 7 ) Is 50 mm. Delivery hose according to one of claims 1 to 6, characterized in that the distance (b) from Winding to winding is 5 mm to 15 mm. delivery hose according to claim 7, characterized in that the distance (b) of Turn to turn is 10 mm. delivery hose according to one of the claims 1 to 8, characterized in that the film thickness 0.2 mm 1 mm. delivery hose according to claim 9, characterized in that the film thickness 0.2 mm. Conveying hose according to one of claims 1 to 10, characterized in that the threads at an angle (α, α ₁ , α ₂ ) of 40 ° to <54 ° to the tube axis (X). Delivery hose according to claim 11, characterized in that the threads extend at an angle (α, α ₁ , α ₂ ) of 45 °. Conveying hose according to one of claims 2 to 12, characterized in that between the first and second reinforcing member ( 3 . 5 ) two spirals ( 4 ) are arranged. Conveying hose according to one of claims 2 to 13, characterized in that the spiral ( 4 ) is a spring steel wire spiral. Delivery hose according to one of claims 1 to 14, characterized in that the inner layer ( 2 ) and / or outer layer ( 6 ) consists of an ethylene-propylene-diene copolymer or its blends.