阅读说明：本技术 螺旋软管 (Spiral hose ) 是由 K·伊尔马兹 D·辛格 S·卡拉亚吉兹 N·辛格 B·塞伯拉 N·阿拉斯 于 2019-12-10 设计创作，主要内容包括：本发明涉及一种螺旋软管(1),包括：-管(2),其具有第一壁厚度(t-I)；-第一强化封装(3),其围绕所述管(2)的圆周布置,包括第一橡胶层(8),所述第一橡胶层嵌入围绕所述管(2)以螺旋形路径卷绕的至少一组第一和第二导线层(6；7),其中所述第一层(6)的卷绕方向与所述第二层(7)的卷绕方向相反,所述第一强化封装(3)具有第一封装厚度(t-(R1))；-第二强化封装(4),其围绕所述第一强化封装(3)的圆周布置,包括第二橡胶层(11),所述第二橡胶层嵌入围绕所述第一强化封装(3)以螺旋形路径卷绕的至少第二组第三导线层(9)和第四导线层(10),其中所述第三层(9)的卷绕方向与所述第四层(10)的卷绕方向相反,所述第二强化封装(4)具有第二封装厚度(t-(R2))；以及-覆盖层(5),其围绕所述第二强化封装(4)的圆周布置、具有覆盖封装厚度(t-C),其中所述第二强化封装(4)中的所述导线(9；10)的直径小于所述第一强化封装(3)中的所述导线(6；7)的直径。(The invention relates to a spiral hose (1) comprising: -a tube (2) having a first wall thickness (t) I ) (ii) a -a first reinforced package (3) arranged around the circumference of the tube (2), comprising a first rubber layer (8) embedded in at least one set of first and second conductor layers (6; 7) wound in a helical path around the tube (2), wherein the winding direction of the first layer (6) is opposite to the winding direction of the second layer (7), the first reinforced package (3) having a first package thickness (t) t R1 ) (ii) a -a second reinforcement package (4) arranged around the circumference of the first reinforcement package (3), comprising a second rubber layer (11), the second rubber layerA rubber layer embedded in at least a second set of a third wire layer (9) and a fourth wire layer (10) wound in a spiral path around said first reinforced package (3), wherein the winding direction of said third layer (9) is opposite to the winding direction of said fourth layer (10), said second reinforced package (4) having a second package thickness (t) of R2 ) (ii) a And-a cover layer (5) arranged around the circumference of the second reinforcement package (4) with a cover package thickness (t) C ) Wherein the wires (9; 10) is smaller than the diameter of the wires (6; 7) of (c) is measured.)

1. A spiral hose (1) comprising:

-a tube (2) having a first wall thickness (t)_I)；

-a first reinforced package (3) arranged around the circumference of the tube (2), comprising a first rubber layer (8) embedded in at least one set of first and second conductor layers (6; 7) wound in a helical path around the tube (2), wherein the winding direction of the first layer (6) is opposite to the winding direction of the second layer (7), the first reinforced package (3) having a first package thickness (t) t_R1)；

-a second reinforced package (4) arranged around the circumference of said first reinforced package (3), comprising a second rubber layer (11) embedding at least a second set of a third wire layer (9) and a fourth wire layer (10) wound in a spiral path around said first reinforced package (3), wherein the winding direction of said third layer (9) is opposite to the winding direction of said fourth layer (10), said second reinforced package (4) having a second package thickness (t) t_R2) (ii) a And

-a cover layer (5) arranged around the circumference of the second reinforcement package (4) having a cover package thickness (t;)_C)，

Characterized in that the diameter of the wires (9; 10) in the second ruggedized package (4) is smaller than the diameter of the wires (6; 7) in the first ruggedized package (3).

2. The helical hose (1) according to claim 1, wherein the difference in diameter between said wires (6, 7; 8,9) in said first (3) and second (4) reinforcing layers is at least 0.09 mm.

3. The spiral hose (1) according to claim 1 or 2, wherein at least one and preferably all of the wire layers (9; 10) of the second reinforcement package (4) have a wire filling ratio between 50% and 80%.

4. A spiral hose (1) according to claim 1, 2 or 3, wherein is defined as (t)_I)/(t_I+t_R1+t_R2+t_C) The gauge of (a) is between 12% and 17%.

5. The helical hose (1) according to any one of the preceding claims, wherein at least one of said tube (2) and said cover layer (5) is made of rubber.

6. The spiral hose (1) according to any of the preceding claims, wherein at least one of the conductor layers (6,7,8,9) is made of steel wire.

Technical Field

The present invention relates to a spiral hose, comprising:

-a tube having a first wall thickness (t)_I)；

-a first reinforced package arranged around the circumference of the tube, comprising a first rubber layer embedded in at least one set of a first and a second wire layer wound in a spiral path around the tube, wherein the winding direction of the first layer is opposite to the winding direction of the second layer, the first reinforced package having a first package thickness (t) of_R1)；

-a second reinforced package arranged around the circumference of said first reinforced package, comprising a second rubber layer embedded in at least a second set of a third set of layers wound in a spiral path around said first reinforced packageA wire layer and a fourth wire layer, wherein the winding direction of the third layer is opposite to the winding direction of the fourth layer, and the second reinforced package has a second package thickness (t)_R2) (ii) a And

-a cover layer arranged around the circumference of the second reinforcement package having a cover package thickness (t)_C)。

Background

A coiled hose is used to transport fluid under pressure. In order to obtain a hose capable of withstanding the forces observed in high pressure applications, it is known to provide the hose with reinforcements in the hose wall, for example from US2011/290362a 1. The inner tube of such a hose is encapsulated by a reinforcing layer comprising a layer of wires embedded in rubber. These layers are covered by a cover layer to protect the strengthening layer from wear and abrasion.

The strengthening layer improves the strength of the pipe so that higher pressures can be tolerated. However, the reinforcing layer also reduces the flexibility of the hose. Furthermore, if the reinforcement layer is reduced to provide greater flexibility, the service life of the hose is also reduced.

Disclosure of Invention

It is therefore an object of the present invention to mitigate or even eliminate the above-mentioned drawbacks of the prior art.

This object is achieved by a spiral hose according to the preamble, characterized in that the diameter of the wires in the second reinforcement package is smaller than the diameter of the wires in the first reinforcement package.

It has been found that selecting a diameter of the wires in the second reinforced package that is smaller than the diameter in the first reinforced package will result in an increase in the flexibility of the hose, which will tend to properly position the hose while maintaining a high burst strength and a low likelihood of abrasion.

The first reinforced package will typically include one or two sets, resulting in two or four layers of wires in the first reinforced package, respectively.

When wound around a tube, the first and second conductor layers are in opposite directions, e.g. the first layer is left-handed and the second layer is right-handed, or vice versa. Preferably, the direction of the outer conductor layer of the first reinforced package is also opposite to the direction of the inner conductor layer of the second reinforced package.

Thickness t of the tube_IPreferably greater than 1.1 mm to further prevent tube bursting.

In a preferred embodiment of the spiral hose according to the invention, the difference in diameter between the wires in the first and second reinforcement package is at least 0.09 mm.

It has been found that the above-mentioned effects are found in an in-depth manner in particular if the size difference is at least 0.09 mm.

In a further preferred embodiment of the spiral hose according to the invention, at least one and preferably all of the wire layers of the second reinforced package have a wire filling rate of between 50% and 80%.

A relatively low wire fill rate (i.e., 80% or less) results in a coiled hose with further increased flexibility. The filling rate of the wire is lower than 50%, and the strengthening effect of the wire is obviously reduced.

In this regard, the wire fill rate is a measure of the coverage of the surface by the wire. A surface completely covered by a wire will have a wire fill of 100%, whereas in the case of no wire layer present, the wire fill will be 0%.

In another embodiment of the spiral hose according to the present invention, is defined as (t)_I)/(t_I+t_R1+t_R2+t_C) The gauge of (a) is between 12% and 17%.

If the gauge is chosen smaller, the burst probability increases significantly, whereas in the case of larger gauges the practicality of the hose will increase due to the relatively larger wall thickness and thus larger outer diameter and increased stiffness.

In another embodiment of the spiral hose according to the present invention, at least one of the tube and the cover is made of rubber.

In a further embodiment of the spiral hose according to the invention, at least one of the conductor layers is made of steel wire.

Drawings

These and other features of the present invention will be described in conjunction with the appended drawings.

Fig. 1 shows a schematic cross-sectional view of a spiral hose according to the invention.

Fig. 2 shows a sectional side view of the spiral hose according to fig. 1.

Detailed Description

Fig. 1 and 2 disclose a spiral hose 1, which consists of: having a thickness t_IRubber tube 2 having a thickness t_R1First reinforcement package 3 having a thickness t_R2And a second reinforced package 4 having a thickness t_CAnd a rubber coating layer 5.

The first reinforced package 3 comprises a set of steel wires 6,7 embedded in rubber 2, 8. The wires 6,7 are wound in a helical path and have opposite winding directions with respect to each other.

The second reinforcement package 4 comprises steel wires 9, 10 also embedded in the rubber 5, 8, 11. The wires 9, 10 are also wound in a helical path and have opposite winding directions with respect to each other.

The diameter of the wires 9, 10 is 0.09 mm or more smaller than the diameter of the wires 6,7 and the windings of the wires 9, 10 are spaced apart from each other to obtain a wire filling ratio of between 50% and 80% of the adjacent rubber 11.

Example 1

A hose commercially available under the designation FC500-16 was compared to an example of a hose according to the present invention.

Hoses FC500-16 have two reinforcing layers each with two layers of wire, each having a diameter of 0.56 millimeters. The wire fill ratios of the first, second, third and fourth wire layers were 93%, 88%, 81% and 79%, respectively.

An embodiment of the hose according to the invention also has two reinforcing layers. The first ruggedized package has a set of wire layers with a thickness of 0.65 millimeters. The second ruggedized package has a set of wire layers with a thickness of 0.56 millimeters. The wire filling rates of the first, second, third and fourth wire layers are respectively 90%, 89%, 69% and 66%.

Both the FC500-16 hose and the embodiments according to the present invention were tested for burst strength and flexibility. FC500-16 has a burst strength of 1486 bar and a flexibility of 162 newtons. An embodiment according to the invention has a burst strength of 1541 bar and a flexibility of 127 newtons.