DE2625900A1 - HOSE MADE OF ELASTOMER MATERIAL WITH REINFORCEMENT ELEMENTS - Google Patents

Description

Hose made of elastomeric material with reinforcing elements

The invention relates to hoses for suction and unloading for the transport of oil, water, petroleum, sand and Egg mortar, dredged spoil and many other liquids and slurries.

These hoses must have pressure loads as well as vacuum loads withstand and kink resistant when bent, but at the same time have a relatively small radius form.

Current designs usually have an inside diameter from 50 mm to 75 mm and are based on a rubber filling or a rubber tube, a rubber jacket and between there is reinforcement on the pipe and the jacket. Such hoses either withstand pressure or Vacuum. The reinforcement against pressure is generally used in cotton or synthetic yarn, which can either be woven or in cord form. However, wire threads can also be used for this

BORO MONKS: 8 MONKS 22 ST. ANNASTR. 11 TEL: 089/22 35 "

TELEX: 1-85844 INVEN d

609851/0386

TELEGRAM:

INVENTION

BERLIN

TELEPHONE: BERLIN 030/885 6037 030/886 23

BANK ACCOUNT: BERLINER BANK AG. BERLIN 31 3695716000

POST CHECK ACCOUNT: W. MEISSNER, BLN-W 122 82-109

be used. Reinforcement against vacuum is common. a single or multiple screw shape or a very strong wire to withstand the vacuum External pressure can still bend the hose. These hoses are usually made of rubber, metal and textiles and withstand pressure and vacuum without breaking.

In a special application, the hoses are provided with foam so that the hose floats on the water can when it's full of oil or dredging sludge. Thus, the high density of a hose with a helical one Wire reinforcement is a problem because it requires a large amount of foam.

Hoses that are only reinforced with a polyester high-denier egg thread material, as is particularly the case "from Imperial Ohemiecal Industries, Ltd." manufactured "macrofile" have also been proposed. (See UK patent application 1,293,200).
Such hoses are relatively light in weight.

The invention provides an improved, lightweight hose which, and preferably, can withstand pressure and vacuum operation is either pressure-resistant or can be easily restored in the event of breakage.

A! Peil of the invention consists of a hose made of reinforced elastomeric material, the reinforcement at least one layer of a wound single-thread reinforcement and has at least one layer of aramid fabric reinforcement.

The single-thread winding is preferably at an "angle between

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see 50 ° and 60 ° to Schiauchach.se applied. Furthermore two such layers are usually made with an intermediate layer of elastomeric material such as natural or synthetic rubber Mistake. One or more such layers contain several windings one on top of the other Polyester thread, e.g. made of polyethylene terephthalate, but other polymers, e.g. nylon, can also be used.

The fabric reinforcement is again preferably applied at an angle between 50 ^ to 60 to the hose axis and is a fabric made of an aramid yarn, e.g. a Gordstoff or a rectangular woven fabric. It is preferably applied in conjunction with a corresponding rubber adhesive layer one side used.

The reinforcement of the hose wall between the inner layer and the outer sheath consists in a preferred one Exemplary embodiment of an essential rubber lining with single-thread reinforcement on each surface where the fabric reinforcement is glued by rubber material. In such a case, the fabric layer can be the outermost or the innermost and the order of the layers is: single thread ply-rubber layer-single thread ply-adhesive layer-fabric ply.

However, it is intended to use a rubber adhesive layer on the fabric to glue on one of the layers of thread so that it is between two layers of thread and next to the considerable rubber layer is located. In such a case the order of the layers is e.g .:

Single thread layer-glue-fabric-rubber-thread layer. In any case, these individual layers or layers must therefore be used be included in the interior and exterior lining.

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The invention is described with the aid of the drawings. In these is:

FIG. 1 shows a section through part of the wall of a known hose; and the

Figures 2, 3 and 4 correspond to the sections through a Part of the wall of various embodiments of hoses according to the invention.

Figure 1 shows a hose made of an innermost rubber lining or a pipe 1, a pressure-resistant reinforcement 2 and a rubber jacket 3. The pressure-resistant reinforcement

2 can be made of a material or natural textile materials or of a material made of synthetic textile materials or consist of a layer of steel wires.

Around the reinforcement 2 is a screw 4- made of strong Wire wrapped and thus in the rubber coating layer

3 embedded. Such a hose is unbreakable, is of relatively high density, so that it can hold a large amount of Foam needed before it can swim on the water.

FIG. 2 shows a section of a hose wall according to the invention, it consists in succession of (a) one innermost lining or a pipe 5 made of natural or Synthetic rubber, (b) a layer 6 of reinforcing fabric made of aramid yarn, which is attached to the larger axis of the reinforcement at an angle of 55 ° to the hose axis, (c) a rubber adhesive layer 7> (d.) a first single thread layer 8, which is again wound up with its larger axis at an angle of 55 ° to the hose axis, (e) a considerable one Rubber layer 9 »(f) of a second layer 10 of a single thread layer, those with 55 to the hose axis (usually opposite the former), and (g) a rubber

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miummantellage 11. The inner not shown and external protective materials can also be provided.

Figure 3 shows a hose construction in which the composition of the individual layers is as described in connection with FIG. 2, but with the sequence of the layers of the layers is different «, The layers are thus laid out in the order 5> 8,9,10., 7» 6, ll.

Although the layer 6 made of reinforcing fabric made of aramid yarn and If the thread layers 8 and 10 are shown as individual layers for purposes of illustration, they will in most cases each multiple layers, consisting of 2, 4, 6, or 8 layers exist in which the thread at 55 ° to the tube axis and each subsequent position in the opposite direction to the previous is created.

Although the fabrics are generally at an angle of 55 ° angles other than 55 ° can be used for special purposes, e.g. due to flexibility and buckling resistance for some or all of the single thread layers and / or aramid yarn layers be used.

Those skilled in the art can recognize that the relative thickness of the layers and that of the hose wall compared with the Hose diameters are not necessary, as in the Drawing is shown, but that common similar thicknesses or proportions are possible in the art, The rubber layer 9 will thus generally have a thickness of 5/6 to 10% of the hose diameter and not less than 6.5 mm.

While it is not intended to alter the theoretical iCr

609851/0386

to limit the invention, it appears that the Monofilament layers (which are preferably polyester monofilaments are) give a resistance to collapse under vacuum and that the position of the aramid fabric reinforcement gives strength to internal pressure. Furthermore, the hose has a relatively small Weight, in that all parts are organic and without influence a metallic reinforcement. The hose is also more flexible and break-proof than standard wire-reinforced tubing Tubing and can easily be restored after a break has occurred.

The layer 6 made of aramid thread material can, for example _, consist of a yarn with a tensile strength of 22 grams per denier and have an elongation between 2 and 4yo when broken. This yarn can be made from a cord fabric or a rectangular woven fabric and have a weight of 1,000 or 2,000 denier, for example.

The monofilament layer is preferably based on yarns in the range of 1,000 to 10,000 denier and is composed of single filaments in the range of 100 to 1,500 denier and of a tenacity of at least 6 grams per denier.

Table I shows the properties of the single thread layers and the aramid yarn in comparison with other materials, which are used for hose reinforcement. It shows the advantageous properties of the iiramide threads with regard to Strength and weight. But it does not show the advantageous stiffness properties of the single thread layer, since there is none appropriate test there.

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Table I.

Extension polyesterbe i break. Single thread

Steel aramid nylon polyester wire

Strength 13 GM / Decitex 6.25 Spec.GeWo 1.38

2-4- 13-16 11-17 2-4-

21 7.2-8.2 6.7-7.6 3.4--4-,

1.44 1.14 1.38 7.85

The preferred construction is shown in Figure 2 because it is best of the relative strengths and stiffnesses makes use of the components.

Table II compares the properties of hoses of the construction of Figure 2. These hoses are special Intended for oil suction and discharge purposes and especially for use as floating hoses therefor. Table III gives details of the tubing constructions to which the third and fourth columns of the Table III relates, while Tables IV and V indicate the properties of the monofilament and aramid materials that have been used with these hoses.

from Table II it can be seen that the single thread / aramid hose has all the good properties of all known hoses with many additional properties that this one Construction are unique:

a) Extensions are as good as steel thread tubes and better than pure single thread tubes;

b) the smallest bending radius and break are like the properties of single-thread hoses.

The specific weight is the same as that of single-thread hoses.

609851/0386

The thickness for single-thread layers / aramid tubes is lower than for the pure single-ply tubing while the specific weight is maintained. Thus the weight is lower than with any other hose, this combination of wall thickness and specific weight is the volume (or weight) of the foam, which must be added to the hose to make it buoyant with a buoyancy reserve of 33%, in the case of single-thread layers / aramid tubes compared to every other hose is greatly reduced.

It can be seen that the volume of the foam is large compared to the volume of the tubular body, i. 100 to 200%, so that the costs for the foam and for the application to the hose are considerable. Further be the susceptibility to damage and the importance of loss because of the reduced amount of buoyant material of buoyant material reduced.

Certain embodiments and details have been described in order to illustrate the invention, but these are A person skilled in the art can make changes without departing from the scope and spirit of the invention.

Tables II, III, IV, and V follow.

609851/0386

1Ü 11 Simple-
layer Single thread
layer U.
uramid - 9
Tabel 2.5 Steel wire,
Steel wire
screw IO 7.5 Reinforcement synthetic fabrics
and
Steel s clir aube 3840 2.5 1 * 5 Pass by
de longevity
tion at Druckp
of 15.7 kg / cm
in 70 not 1.5 1220 1220 Permanent Ver
lengthening after
Easing of the
Pressure in% 78.5
1.9 1860 fully
constant fully
constant smallest bend
straight
(300 mm pipe)
in mm 42.5 not 78.5
1.50 78.5
1.50 Again
adjust
fracture 43 78.5
2.14 54.5 44.5 Fracture pressure min
in kg / cm ^
Spec. Weight
of the hoses
300 mm pipe 38.2 57.9 45.5 Wall thickness in
TTITTl 37.9 Material volume
per meter
Hose length
in dm *

Weight of the material per meter of hose length in kg

82

82

86

78.5

Foam (specific weight = 0.04) per 1 meter of tube length (Reserve buoyancy)

3.82

3.25

2.56

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Table III

Construction of the 300 mm pipe
(in mm)

Average diameter of the single-thread ski reinforcement

Single thread layer

31.28

Single thread layer and aramid

Pipe thickness 4-, 75 4.75 Protection-
inlay 0.14 0.14 Middle
Diameter or
.aramid reinforcement 304 Number of layers
of the aramid fabric 2

31.19

Number of layers of single-thread reinforcement

Sandwich rubber layer thickness

25.4

25.4

Kittlerer diameter of the second single thread layer reinforcement

396.0

383.0

Number of layers of
Single thread layer
Strengthening 6th 2 o protective insert 0.14 0.14 sheathing
thickness 3.03 3.03

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- 11 Table IV

chain

S _c huss

Ends at 100 mm

Aramid yarn I5OO denier 2 / ply / 3 cables Twist 5 tpi (double 2.5 tpi cable)

30's / 4 layer Eayon

80

Shooter strike to 100 mm

Strength per chain end 1,

kg

Table V

chain

Shot

Ends per 100 mm

Shooter strike to 100 mm

(Single thread and fabric) (7 single thread layers) 4620 dtex 9's cotton

100
8th

Strength per chain sounding 29 kg

- patent claims -

609851/0386 - 12 -

Claims (13)

Patent claims: (1 «J hose made of elastomer material with reinforcement elements, characterized by at least two radially distributed layers of wound thread layers and at least one layer of aramid fabric (6). 2. Hose according to claim 1, characterized in that the Layer of elastomeric material with a thickness of 5% to 10% of the hose diameter » 3 · hose according to claim 1, characterized in that one Layer of aramid fabric (6) directed radially inwards in the innermost layer of the wound single thread layer lies. 4. Hose according to claim 1, characterized in that this Layer made of aramid fabric (6) is located between the layers of the wound layers of thread (8, 10). 5 · Hose according to claim 1, characterized in that each wound thread layer contains several windings on top of each other. - 13 609851/0386 BORO MONKS: TELEX: TELEGRAM: PHONE: BANK ACCOUNT: CHECK ACCOUNT: 8 MONKS 22 1-856 44 INVENTION BERLIN BERLINER BANK AQ. W. MEISSNER, BLN-W ST. ANNASTR. 11 INVEN d BERLIN 030/885 60 37 BERLIN 31 122 82-109 TEL .: 089/22 35 44 030/886 23 82 3695716000 6. Hose according to claim 1, characterized in that in the case of several windings adjacent windings are directed in opposite directions. 7. Hose according to claim 1, characterized in that the aramid fabric (6) at an angle of 50 ° to 60 ° to the hose axis. 8. Hose according to claim 3 »characterized in that at least the layer of aramid fabric (6) several on top of each other Contains wrapped fabrics. 9. Hose according to claim 8, characterized in that the adjacent substances are directed in opposite directions are. 10. Hose according to claim 1, characterized in that the single thread layer is a (8,10) polyester. 11. Hose according to claim 10, characterized in that the polyester is polyethylene terephthalate. 12. Hose according to claim 1, characterized in that the single thread layer (8, 10) it is in the form of a yarn in a denier range from 1000 to 10000 and from single thread layers in the range from 100 to
1500 denier consists " 13. Hose according to claim 1, characterized in that the aramid fabric contains an aramid yarn of 1000 to 2000 denier _o Dipl.-Ing. H. J. Prestintf Patent attorney g 609851/0386 Blank page